СПОСОБЫ ПОЛУЧЕНИЯ СОПОЛИМЕРОВ ИЗ НЕНАСЫЩЕННОЙ МОНОКАРБОНОВОЙ КИСЛОТЫ И ПРОИЗВОДНОГО МОНОНЕНАСЫЩЕННОЙ КАРБОНОВОЙ КИСЛОТЫ И МАТЕРИАЛ, ПОЛУЧЕННЫЙ ДАННЫМИ СПОСОБАМИ

Изобретение относится к блочным полимерам, получаемым литьевым способом. Предложены варианты способа получения сополимеров из ненасыщенной монокарбоновой кислоты и производного мононенасыщенной карбоновой кислоты литьевым способом, при которых полимеризацию проводят в фазе сиропа, полученной добавлением полимеров, растворимых в смеси исходных мономеров, причем в качестве ненасыщенной монокарбоновой кислоты используют метакриловую кислоту, а в качестве производного мононенасыщенной карбоновой кислоты - метакрилнитрил. Получаемый материал может содержать до 400 масс. частей добавок в расчете на общую массу способных к полимеризации групп, которые нерастворимы в реакционной смеси, необходимой для получения материала. 3 н. и 9 з.п. ф-лы, 2 ил.

НЕПРЕРЫВНЫЙ СПОСОБ ПОЛУЧЕНИЯ ВОДОАБСОРБИРУЮЩИХ ПОЛИМЕРОВ

... 1. Способ получения частиц абсорбирующего воду полимера, включающий в себя стадии(i) получения водного раствора мономера, содержащего по меньшей мере частично нейтрализованные моноэтиленненасыщенные мономеры, несущие группы (α1) карбоновой кислоты, и по меньшей мере один сшивающий агент (α3);(ii) необязательного добавления мелких частиц водоабсорбирующего полимера или водных растворов солей к водному раствору мономера;(iii) добавления к водному раствору мономеров инициатора полимеризации или по меньшей мере одного компонента системы инициаторов полимеризации, которая содержит два или более компонента;(iv) понижения содержания кислорода водного раствора мономеров;(v) загрузки водного раствора мономеров в реактор-полимеризатор;(vi) полимеризации мономеров в водном растворе мономеров в реакторе-полимеризаторе;(vii) выгрузки стренги полимерного геля из реактора-полимеризатора и необязательного измельчения полимерного геля с получением таким образом частиц полимерного геля;(viii) высушивания ...

ФОРМУЕМЫЕ В ПЕНОМАТЕРИАЛ ПОЛИ(МЕТ)АКРИЛИМИДНЫЕ ЧАСТИЦЫ В ЗАКРЫТЫХ ФОРМАХ ДЛЯ ПОЛУЧЕНИЯ ЖЕСТКИХ ПЕНОПЛАСТОВЫХ ОСНОВ

СИСТЕМА И СПОСОБ ПОЛУЧЕНИЯ IN SITU-ПЕНОМАТЕРИАЛА

ПОГЛОЩАЮЩИЙ ЭЛЕМЕНТ, СОДЕРЖАЩИЙ ГИГРОСКОПИЧНУЮ СМОЛУ, ДЛЯ ИСПОЛЬЗОВАНИЯ В ГИГИЕНИЧЕСКИХ ПРОКЛАДКАХ

... 1. Поглощающий элемент для использования в одноразовых гигиенических прокладках, причем поглощающий элемент содержит модифицированную гигроскопичную смолу, выработанную согласно способу, содержащему этапы, на которых: а) смешивают гигроскопичную смолу и водорастворимый инициатор полимеризации радикалов без добавления этиленненасыщенного мономера и б) облучают полученную смесь высокоэнергетичными лучами. 2. Поглощающий элемент по п.1, в котором упомянутый водорастворимый инициатор полимеризации радикалов представляет собой по меньшей мере один элемент, выбранный из группы, состоящей из персульфата, перекиси водорода и водорастворимых азосоединений. 3. Поглощающий элемент для использования в одноразовых гигиенических прокладках, причем поглощающий элемент содержит модифицированную гигроскопичную смолу, выработанную согласно способу, содержащему этапы, на которых: а) смешивают гигроскопичную смолу и разлагаемый теплом инициатор полимеризации радикалов без добавления этиленненасыщенного мономера ...

ЭЛЕКТРООСАЖДАЕМЫЕ ВОДНЫЕ СМОЛОСОДЕРЖАЩИЕ ДИСПЕРСИИ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ

... 1. Электроосаждаемая водная смолосодержащая дисперсия, содержащая: ! (a) полимерный диспергатор, содержащий, по меньшей мере, частично нейтрализованный высокомолекулярный катионный акриловый полимер и ! (b) катионный акриловый полимер, который отличается от полимерного диспергатора. ! 2. Композиция электроосаждаемого покрытия, содержащая дисперсию по п.1. ! 3. Дисперсия по п.1, где дисперсией является стабильная дисперсия. ! 4. Дисперсия по п.3, где дисперсия, по существу, не содержит поверхностно-активного вещества. ! 5. Дисперсия по п.1, где полимерный диспергатор содержит катионный полимер, имеющий функциональные группы, содержащие активный водород. ! 6. Дисперсия по п.1, где полимерный диспергатор характеризуется Z-средней молекулярной массой в диапазоне от 200000 до 2000000. ! 7. Дисперсия по п.6, где полимерный диспергатор характеризуется Z-средней молекулярной массой в диапазоне от 450000 до 2000000. ! 8. Дисперсия по п.1, где акриловый полимер, который отличается от полимерного ...

АЭРОГЕЛИ, КАЛЬЦИНИРОВАННЫЕ ИЗДЕЛИЯ, ИЗДЕЛИЯ С КРИСТАЛЛИЧЕСКОЙ СТРУКТУРОЙ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ

... 1. Монолитный аэрогель, содержащий органический материал и частицы кристаллического оксида металла, при этом количество частиц кристаллического оксида металла находится в диапазоне от 3 до 20 объемных процентов, исходя из общего объема монолитного аэрогеля, причем, по меньшей мере, 70 мольных процентов кристаллического оксида металла представляют собой ZrO.2. Монолитный аэрогель по п. 1, отличающийся тем, что частицы кристаллического оксида металла содержат в диапазоне от 1 до 15 мольных процентов кристаллического оксида металла, представляющего собой YO.3. Монолитный аэрогель по п. 1, отличающийся тем, что частицы кристаллического оксида металла содержат первое множество частиц, и второе, отличное от него, множество частиц.4. Способ получения не содержащего трещин кальцинированного изделия из оксида металла, имеющего x, y и z размеры, по меньшей мере, 5 мм, плотность в диапазоне от 30 до 95 процентов от теоретической плотности, и средний размер соединенных пор в диапазоне от 10 нм до 100 ...

Wärmehärtbare wässrige Harzzusammensetzung und Verwendung derselben als Bindemittel für Mineralwolle

Es wird eine wärmehärtbare wässrige Harzzusammensetzung beschrieben, die als Bindemittel oder als Additiv zu einem Bindemittel für Mineralwolle und Glasfasern eingesetzt werden kann, und die wenigstens eine wärmehärtbare polymere Carbonsäure wie eine Polyacrylsäure mit einer Molekularmasse von 5.000 bis 250.000 D, wenigstens eine organische Aminbase wie ein Alkanolamin, wenigstens eine mit der polymeren Carbonsäure durch Ester- oder Amidbindung vernetzbare Phosphorverbindung wie ein Aminophosphonat, und wenigstens 0,5 bis 20 Masseteile, bezogen auf die polymere Carbonsäure, eines Metallsalzes wie eines Aluminiumsalzes, enthält. Die Summe aus Aminbase und Phosphorverbindung, bezogen auf 100 Masseteile polymere Carbonsäure, liegt im Bereich von 30 bis 100 Masseteile, wobei ein Masseverhältnis von Aminbase zu Phosphorverbindung im Bereich von 3:1 bis 1:3 vorliegt.

PMI-SIRUPPHASEN UND DEREN VERWENDUNG ZUR STABILISIERUNG NICHT LÖSLICHER ADDITIVE

WÄSSRIGES GEL UND HERSTELLUNGSVERFAHREN UND VERWENDUNG DES WÄSSRIGEN GELS

BESCHICHTETE KOERNCHEN AUS ALKALIMETALLSALZEN DER POLYACRYLSAEURE UND VERFAHREN ZU IHRER HERSTELLUNG

A PROCESS FOR THE PREPARATION OF A SODIUM POLYACRYLATE GEL

PROCESS FOR PRODUCING POLYACRYLIC ACID SALT GRANULES EASILY SOLUBLE IN WATER

Gels and hydrogels

Flocculant compositions containing silicon-containing polymers

Method to generate and disperse nanostructures in a composite material

Porous gels and uses thereof

GELS AND HYDROGELS

Flocculant compositions containing silicon-containing polymers

Gels and hydrogels

Method to generate and disperse nanostructures in a composite material

Method to generate and disperse nanostructures in a composite material

Porous gels and uses thereof

Porous gels and uses thereof

Gels and hydrogels

AQUEOUS GEL AND MANUFACTURING PROCESS AND USE OF THE AQUEOUS GEL

PMI SIRUPPHASEN AND THEIR USE FOR STABILIZATION NOT SOLUBLE ADDITIVES

PROCEDURE FOR THE PRODUCTION OF MOLDED ARTICLES

PROCEDURE FOR THE PRODUCTION OF WATER-ABSORBING RESIN AND USE OF IT

PROCEDURE FOR THE PRODUCTION OF ABSORBING COMPOUND MATERIALS

PROCEDURE FOR THE PRODUCTION OF INTERLACED COPOLYMERS OF METHACRYLSÄUREANHYDRID

Methods to produce polymer nanoparticles and formulations of active ingredients

Methods to produce polymer nanoparticles and formulations of active ingredients

The present invention provides a composition including a polymer nanoparticle and at least one agricultural active compound incorporated with the nanoparticle, wherein the nanoparticle are less than 100 nm in diameter, and the polymer includes a polyelectrolyte.

High-capacity macromolecular polymer hydrogen storage material and preparation method thereof

Provided is a high-capacity macromolecular polymer hydrogen storage material, comprising a linear macromolecular polymer as a main chain, and a borane ammonia derivative grafted on the side chain and/or end of the linear macromolecular polymer after a side-chain group and/or end group of the linear macromolecular polymer is aminated by a polyamine compound and reacts with a borohydride. Also provided is a preparation method for the high-capacity macromolecular polymer hydrogen storage material.

System and method for producing in-situ foam

The invention relates to a system and a method for producing an in-situ foam comprising the components 50 to 98 wt.% of one or more inorganic fillers A), 1 to 48 wt.% of one or more cationic or amphoteric polymers B), 0.5 to 48 wt.% of one or more surfactants C), 0.01 to 5 wt.% of one or more crosslinking agents D) which are reactive with the polymers B), 0.5 to 10 wt.% of one or more cell regulators E), selected from silicones, siliconates, and carbon, and 0 to 20 wt.% of one or more additives F), wherein the percentage weights of the components A) to F) are nonaqueous components, and the sum of A) to F) equals 100 wt.%.

COMPOSITION COMPRISING AN ANIONIC POLYMERIC MATERIAL AND THE SALT OF A SATURATED MONOCARBOXYLIC ACID HAVING 6 TO 22 CARBON ATOMS

The invention relates to a coating composition for the coating or binding of pharmaceutically, nutraceutically or cosmetically active ingredients, comprising (a) an anionic polymeric material, and (b) one or more salts of saturated monocarboxylic acids having 6 to 22 carbon atoms, characterized in that the amount of the salts of the monocarboxylic acids in the composition corresponds to 3 to 50 mol percent of the amount of anionic groups in the polymeric material. The invention also relates to a process for preparing a dispersion out of the composition, as well as the use of said composition in enteric-coated solid dosage forms.

PRO-ANGIOGENIC POLYMER SCAFFOLDS

A pro-angiogenic porous polymer scaffold is disclosed. The polymer has at least 20 mol-% monomeric subunits containing acidic functional groups, and has a porosity of at least 40%. The pores in the scaffold are interconnected. A method of making such a scaffold using a novel adaptation to the traditional solvent casting/particulate leaching technique technique is also disclosed. The scaffold may be used for tissue regeneration.

ION EXCHANGE MEMBRANE THROUGH UV INITIATED POLYMERIZATION

Methods of producing an ion exchange membrane support are disclosed. The methods include saturating a polymeric microporous substrate with a charged monomer solution comprising at least one functional monomer, a cross-linking agent, and an effective amount of at least one photopolymerization initiator and polymerizing the at least one functional monomer by exposing the saturated polymeric microporous substrate to ultraviolet light under conditions effective to cross-link the at least one functional monomer and produce the ion exchange membrane support. Methods of producing a monovalent selective ion exchange membrane are also disclosed. The methods include functionalizing an exterior surface of the ion exchange membrane support with a charged compound layer, drying the ion exchange membrane support and soaking the ion exchange membrane support in a solution comprising an acid or a base for an amount of time effective to produce the monovalent selective ion exchange membrane.

PMI SYRUP PHASES AND THEIR USE FOR STABILIZING NON-SOLUBLE ADDITIVES

The use of a high-molecular PMMA or PMMI syrup phase allows for distribution of fillers in the polymerization batch in such a manner that the distribution of the fillers remains homogeneous during polymerization, thereby producing a homogeneous foamed material.

AN ABSORBENT MEMBER COMPRISING A MODIFIED WATER ABSORBENT RESIN

This invention is to provide an absorbent member and a method for making such an absorbent member. The absorbent member comprises modified water absorbent having good production efficiency, good absorbency against pressure, good absorption speed, gel strength, good liquid permeability, and the like. The modified water absorbent resin is made by a method, which comprises (i) a mixing step comprising mixing a water absorbent resin, water, and a water-soluble radical polymerization initiator without addition of an ethylenically unsaturated monomer, to obtain a water absorbent resin composition, and (ii) an irradiating step comprising irradiating said water absorbent resin composition obtained in the mixing step with active energy rays, wherein the surface water content of said water absorbent resin in said water absorbent resin composition at least at any point of time in the irradiating step (ii) is controlled to a level of not lower than 3.0% by weight based on 100% by weight of the water ...

WATER-ABSORBENT RESIN AND ABSORBENT ARTICLE

The following are provided: a water-absorbent resin in which, in the formation of an absorbent material forming an absorbent article, dispersion is satisfactory even in a moisture absorption state, which prevents the occurrence of troubles at the time of manufacturing of the absorbent article and which allows efficient manufacturing; and an absorbent article using an absorbent material containing the water-absorbent resin. The water-absorbent resin according to the present invention is obtained by polymerizing a water-soluble ethylenically unsaturated monomer and performing post-crosslinking thereon with a post-crosslinking agent, and the water-absorbent resin satisfies the requirements below: (A) yellow index is 5.0 or less; and (9) gel strength is 1800 Pa or less.

POLYMERIC WEB COMPOSITIONS HAVING IMPROVED ALKALINE SOLUBILITY

The properties of (meth)acrylic ester/(meth)acrylic acid copolymer webs, such as films and nonwovens, are improved by blending the ester/acid copolymer with a modified polyolefin, such as an ethylene/(meth)acrylic acid copolymer and/or a styrene/butadiene block copolymer, and a polyether block amide copolymer. The copolymer blend provides a polymeric material which is useful for making personal care products such as diapers and feminine pads in that it can be made water-soluble in alkaline solutions while exhibiting other properties which are necessary for adequate product performance. Such materials are also useful for packaging products, such as film for plastic bags and the like.

PROCESS FOR THE PREPARATION OF A SODIUM POLYACRYLATE GEL

A process for the preparation of a sodium polyacrylate gel It comprises treating sodium polyacrylate with water in a proportion of 1 to 10 g/l of water, for a time between 1 and 300 seconds and at a temperature between 10 and 40.degree. C to obtain the gel. The main uses of the gel is to extinguish fires and to be a means for furnishing moisture in agricultural use.

NOVEL DEGRADABLE POLYMERS

A hot alkaline liquid soluble or dispersable composition made from an ethyleneacrylic acid copolymer having an acrylic acid portion, an ethylene-methacrylic acid copolymer having a methacrylic acid portion, an Ionomer-type copolymer having an acrylic acid portion, a methacrylic acid portion, or a combination thereof, or a mixture of these copolymers. The composition further includes additional polymers. Methods of making articles from such compositions. Methods of disposing of such compositions in hot liquid and alkaline conditions. Laminates including the compositions.

Verfahren zur Umwandlung von durch Polymerisation mindestens eines Monomeren der Acrylsäurereihe gewonnenen Polymerisaten in salzartige Produkte.

Elektrischer Schalter mit Lichtbogenlöschung durch ein strömendes Mittel.

Einrichtung zur Messung der Intensität einer Neutronenstrahlung.

Verfahren zur Herstellung von Latices

Composite fabric - includes mixture of waste leather fibres and textile fibres impregnated with resin

A mixt. of waste leather fibres (1-33 mm long) and textile fibres (e.g. natural or synthetic, polyester, polypropylene, polyacrylonitrile) in the ratio 10:90% - 90:10% in mixed e.g. by air jets and formed into aq. suspension having a density of 0.1-0.5 gm/litre. The suspension is filtered to produce a non-woven web which is dried by hot gas at 100 degrees C and then impregnated with an elastomeric material (e.g. water-resistant polyacrylate). A thickening agent (e.g. methylcellulose) together with polysaccharides may be added to the dispersion and the pH may be controlled to be 4-7 by Al2(SO4)3. The fabric is water-proof, cheap to produce and has a high elasticity and extensibility.

FOR THE ORAL ADMINISTRATION CERTAIN GRANULATES OF A DRUG.

PRODUCTION OF MONOMER WITH EXCESS NEUTRALIZATION FOR PRODUCTION OF VODOABSORBIRUYuShchIKh POLYMER PARTICLES

СПОСОБ МОДИФИЦИРОВАНИЯ ПОЛИАКРИЛАТОВ ДЛЯ ПОЛУЧЕНИЯ ВЫСОКОМОЛЕКУЛЯРНЫХ ПОЛИМЕРОВ

Настоящее изобретение относится к области акриловых полимеров и, в особенности, к их модифицированию в целях получения соединений, характеризующихся еще более высокими молекулярными массами. В качестве материала исходного сырья можно использовать пластические материалы, относящиеся к типу акрилового универсального полимера (PAU), например, продаваемого под торговым наименованием "POLYGOR". После этого материал акрилового исходного сырья модифицируют при использовании подходящих соединений модификаторов. Таким образом, модифицированные полимеры могут характеризоваться молекулярными массами в диапазоне от 2х105 до 15х107 а.е.м. и быть растворимыми в воде. Это делает возможным их использование в качестве средств для флоккулирования, коагулирования, ионного обмена и в качестве добавок к поверхностно-активным веществам, предназначенных для увеличения их моющей и пенообразующей способностей.

DISPERSING POLYMERS WITH IMPROVED THERMAL STABILITY

POLYMER DISPERSERS WITH IMPROVED TEMPERATURE STABILITY

MUCH STADIINOE GRINDING PRODUCTION OF VODOABSORBIRUYuShchIKh POLYMER PARTICLES

Crosslinked aramid polymer

The invention pertains to a crosslinked aramid polymer comprising a first aramid backbone which is crosslinked through a poly(meth)acrylic acid with a second aramid backbone. The crosslinked aramid polymer is obtained by polymerizing a monomeric aromatic diamine with a monomeric aromatic diacid, or halide or ester thereof in the presence of poly(meth)acrylic acid, followed by a curing step. The crosslinked aramid polymer is crosslinked through its amide bonds and can be made to a fiber, film or fibrid.

Polyacrylic (polyacrylate) series water absorption resin powder as well as products of same

PMI-浆相及其在稳定不溶性添加剂方面的用途

... 通过使用PMMA或PMMI的高分子量浆相实现了，填料在聚合反应配料中的分布使得在聚合反应期间填料的分布保持均匀。得到了均匀的泡沫塑料。 ...

Conductive carbon material dispersant and conductive carbon material dispersion

Granular water-absorbent resin composition and method of producing the same

POWDERS SUPERABSORBANTES HAS STRONG ABSORPTION AND STRONG CAPILLARY SUCION

DISPERSIONS OF THICKENING AGENTS, PROCESSES FOR THEIR PREPARATION AND THEIR USE.

INFLATABLE AND INSOLUBLE NANOFIBERS AND THEIR USE IN THE TREATMENT OF EFFLUENTS PREDOMINATELY WATER

La présente invention concerne des nanofibres insolubles et gonflables dans un effluent essentiellement aqueux, une méthode de préparation de ces nanofibres et l'utilisation de ces nanofibres pour l'extraction dans un effluent des métaux, notamment les sels métalliques issus des métaux lourds, des terres rares, des métaux alcalins, des alcalinoterreux ou des actinides, dans leurs formes isotopiques stables ou instables.

ABSORBENT CORES HAVING ZONES ARE FREE OF ABSORBENT MATERIAL

L'invention concerne une âme absorbante (28), utilisable dans un article absorbant, comprenant une enveloppe d'âme (16, 16') enfermant un matériau absorbant (60) comprenant des particules de polymère superabsorbant. L'enveloppe d'âme comprend un côté supérieur (16) et un côté inférieur (16'), et l'âme absorbante comprend une ou plusieurs zone(s) (26) essentiellement dépourvue(s) de matériau absorbant à travers lesquelles le côté supérieur de l'enveloppe d'âme est fixé au côté inférieur de l'enveloppe d'âme, de sorte que lorsque le matériau absorbant gonfle, l'enveloppe d'âme forme un ou plusieurs canaux (26') le long de la ou des zone(s) (26) essentiellement dépourvue(s) de matériau absorbant. Les particules de polymère superabsorbant présentent un temps pour atteindre une absorption de 20 g/g (T20) inférieur à 240 s tel que mesuré selon le procédé de test de K(t).

FLAME-RETARDANT FILAMENTS

PREPARATION METHOD OF SUPER ABSORBENT POLYMER

... 본 발명은 고흡수성 수지의 제조 방법에 관한 것이다. 본 발명의 일 측면에 따른 고흡수성 수지의 제조방법은, 고흡수성 수지를 제조하는 과정에서 분쇄된 함수겔상 중합체를 얻은 다음, 상기 분쇄된 중합체에 표면 가교제, 알코올, 및 이온성 액체를 포함하는 표면가교액을 분사하여 상기 분쇄된 중합체의 표면을 가교하는 단계를 포함한다. 이러한 고흡수성 수지의 제조방법은 이온성 액체를 사용하여 저급 알코올을 사용하지 않거나 함께 사용되는 경우 그 양을 최소로 할 수 있어 비용절감 및 추가적인 건조처리를 줄일 수 있는 효과가 있고, 겔의 팽윤을 조절하여 제품 물성이 우수한 고흡수성 수지를 제조할 수 있다.

고흡수성 수지

... 본 발명은 보수능, 가압 흡수능, 통액성 및 겔 강도가 최적화되어, 전체적으로 균형 있고 보다 우수한 물성을 나타내는 고흡수성 수지에 관한 것이다. 이러한 고흡수성 수지는 적어도 일부가 중화된 산성기를 갖는 수용성 에틸렌계 불포화 단량체를 중합시킨 분말 형태의 베이스 수지를 표면 가교시킨 가교 중합체를 포함하는 고흡수성 수지로서, 원심분리 보수능(CRC), 가압 흡수능(AUP), 겔 강도(G') 및 생리 식염수 흐름 유도성(SFC) 등이 소정의 관계식을 충족할 수 있다.

Optical film comprising primer layer comprising polyester-resin and polarizing plate using the same

... 본 발명은 기재 필름; 및 상기 기재 필름의 적어도 일면에 폴리에스테르 수지 및 수분산성 미립자를 함유하고, 상기 기재 필름과 굴절률 차가 0.03 이하인 프라이머층을 포함하는 광학 필름에 있어서, 상기 폴리에스테르 수지는 방향족 카르복시산 화합물 및 지방족 카르복시산 화합물이 1:9 내지 9:1의 몰비로 포함되는 다염기산과 폴리올의 반응에 의해 형성되는 폴리에스테르글리콜을 포함하는 것인 광학 필름에 관한 것으로, 광학 필름과 기능성 코팅층 사이의 접착력이 우수하며, 작은 굴절률 차로 인하여, 레인보우 현상이 적고, 광학 물성이 우수하다.

SUPER ABSORBENT POLYMER

고흡수성 수지의 제조 방법 및 이를 통해 제조된 고흡수성 수지

... 본 발명은 고흡수성 수지의 제조 방법에 관한 것으로, 본 발명에 따른 고흡수성 수지의 제조 방법은 3종의 중합 개시제를 사용함으로써 고흡수성 수지 내의 미반응 단량체의 함량을 낮출 수 있다는 특징이 있다.

A PROCESS FOR PRODUCING SURFACE-POSTCROSSLINKED WATER-ABSORBENT POLYMER PARTICLES

ACTIVE ENERGY RAY-CURABLE COMPOSITION, LAMINATE, AND METHOD FOR PRODUCING LAMINATE

폴리아크릴산(염)계 흡수제의 제조 방법 및 그 흡수제

... 본 발명은, 고물성(특히 고통액성이나 안티-케이킹성)의 흡수제의 제조에 있어서, 표면 가교 공정이 율속으로 되기 쉬운 현 상황에서, 흡수제의 생산성의 향상이나 잔존 표면 가교제를 저감(이나 그 안티-케이킹성 향상)하는 흡수제의 제조 방법을 제공하는 것을 목적으로 한다. 상기 흡수제의 제조 방법은, 다가 금속 양이온 함유 화합물, 수불용성 무기 미립자, 양이온성 고분자 화합물에서 선택되는 첨가제를 사용하고, 또한 열처리계 내의 온도를 100 내지 300℃, 노점을 45℃ 미만으로 제어해서 표면 가교, 특히 알킬렌카르보네이트 화합물로 표면 가교하는 방법이다.

우레아 유도체를 포함하는 열 팽창성 조성물

... 본 발명은 하나 이상의 퍼옥사이드성 가교 중합체, 하나 이상의 퍼옥사이드 및 하나 이상의 흡열성 화학 발포제 (상기 발포제는 하나 이상의 고형의, 임의로 관능화되는, 폴리카르복실산 또는 이의 염, 및 본원에서 정의하는 바와 같은 하나 이상의 화학식 (I) 에 따른 우레아 유도체를 포함함) 를 함유하는 열 팽창성 조성물, 상기 조성물을 함유하는 성형체, 및 이 유형의 성형체를 사용하여 구성 요소에서의 공극을 밀봉 및 충전시키는 방법, 구성 요소, 특히 중공 구성 요소를 보강 또는 강화시키는 방법 및 가동성 구성 요소를 결합시키는 방법에 관한 것이다.

SUPER ABSORBENT POLYMER AND PREPARATION METHOD THEREOF

WATER-ABSORBENT POLYMER STRUCTURE WITH IMPROVED PERMEABILITY AND ABSORPTION UNDER PRESSURE

The invention relates to a method for producing water-absorbent polymer structures, comprising the following steps: i) an untreated, water-absorbent polymer structure is provided; ii) the untreated, water-absorbent polymer structure is brought into contact with a salt comprising a divalent or higher-valent cation of a metal and at least one organic base as an anion. The invention also relates to water-absorbent polymer structures that can be obtained using said method, to water-absorbent polymers, to a composite containing a water-absorbent polymer structure and a substrate, to a method for producing a composite, to the composite obtained using said method, to chemical products such as foams, moulded bodies and fibres containing water-absorbent polymer structures or a composite, to the use of water-absorbent polymer structures or a composite in chemical products and to the use of a salt for treating the surface of water-absorbent polymer structures. © KIPO & WIPO 2009 ...

process for preparing water-absorbing polymeric particles

PRODUCTION METHOD AND METHOD FOR ENHANCING LIQUID PERMEABILITY OF WATER-ABSORBING RESIN

PRODUCTION METHOD AND METHOD FOR ENHANCING LIQUID PERMEABILITY OF WATER-ABSORBING RESIN5A method for the production of a water-absorbing resin is to be provided which permits enhancement and stabilization of property, for example, liquid permeability, of a water-absorbing resin by a simple and convenient method10 without requiring change of raw materials or expensive facility investment. The method comprises a polymerization step for polymerizing an aqueous solution of acrylic acid (or salt thereof) to obtain a hydrogel cross-linked polymer; a drying step for drying the hydrogel cross-linked polymer15 to obtain a water-absorbing resin powder; a classification step for classifying the water-absorbing resin powder; and a surface cross-linking step for surface cross-linking the water-absorbing resin powder before or after the classification step, wherein electricity is eliminated in20 the classification step.[No suitable figure] ...

AQUEOUS LIQUID ABSORBING RESIN, AQUEOUS LIQUID ABSORBING COMPOSITION, AND ABSORBENT BODY AND ABSORBENT ARTICLE USING SAME

An absorbent resin and absorbent composition that use a large amount of material derived from plants, have excellent aqueous liquid absorbing capability, and have excellent absorbing capability in a compressed state due to having a favorable gel elastic modulus. An absorbent resin made by bonding a polysaccharide oxide (A1) having a carboxyl group that may be neutralized by a neutralizing agent, and/or a cross-linked compound thereof (A2), with a poly(meth)acrylic acid (B1) where at least one of the carboxyl groups may be neutralized by a neutralizing agent, and/or a cross-linked compound thereof (B2); or an absorbent composition made by blending (A1) and/or (A2) and (B1) and/or (B2); wherein the weight average molecular weight of (A1) is 2000 to 10,000,000, the acid value of (A1) is 65 to 524 mg KOH/g, and if (A1) has a carboxyl group that has been neutralized by a neutralizing agent, the acid value prior to neutralizing is 65 to 524 mg KOH/g.

METHOD FOR MANUFACTURING A WATER-ABSORBING RESIN

The disclosed continuous manufacturing method for a water-absorbing resin includes a plurality of connected continuous steps. Said method includes: a polymerization step in which an unsaturated monomer in an aqueous solution is polymerized; a drying step in which a water-containing cross-linked granular polymer gel, obtained in a microgranulation step during or after polymerization, is dried; a post-drying pulverization step; a post-drying sorting step; and a surface-treatment step, after the sorting step, in which a water-absorbing resin powder is subjected to a surface treatment. Said method is characterized in that, with some of the above steps kept running, the other steps are halted, and subsequently all steps are restarted.

WATER-ABSORBENT RESIN POWDER AND ABSORBER AND ABSORBENT ARTICLE USING THE SAME

To provide an absorber that has a high absorption speed, is unlikely to cause a liquid to remain on a skin-contacting surface, has excellent dry feeling, and is unlikely to cause excreted body fluid to return, and a water-absorbent resin powder that can be suitably used in the absorber. A water-absorbent resin powder of the present invention is characterized by meeting the following requirements (a) to (d): (a) a bulk density: 0.45 g/ml to 0.62 g/ml; (b) an absorption speed by a vortex method: 20 seconds to 50 seconds; (c) a liquid-passing speed under load: 10 seconds or less; and (d) a moisture absorption blocking ratio: 5% or less. An absorber of the present invention uses the water-absorbent resin powder of the present invention. An absorbent article of the present invention includes the absorber of the present invention.

CONTROLLED RELEASE POLYACRYLIC ACID GRANULES AND A PROCESS FOR PREPARING THE SAME

La présente invention porte sur un procédé de préparation de granulés d'acide polyacrylique et sur les granulés ainsi élaborés. Ces granulés sont coulants et ont une densité apparente accrue par rapport aux acides polyacryliques polymérisés et une faible quantité de poussière, qui est en général caractérisée par des particules traversant un tamis à maille 325. Les granulés élaborés par le procédé de la présente invention peuvent être utilisés pour préparer des comprimés à libération régulée, notamment des comprimés pharmaceutiques à libération régulée. Les comprimés élaborés à partir de granulés préparés selon le procédé de la présente invention possèdent des propriétés à libération régulée meilleures que celles des comprimés préparés à partir de granulés élaborés par d'autres procédés de granulation connus.

PRECIPITATION POLYMERIZATION OF COPOLYMERS OF A VINYL LACTAM AND A POLYMERIZABLE CARBOXYLIC ACID AND SOLUBILIZATION THEREOF

A precipitation polymerization process for making copolymers of a vinyl lactam and a polymerizable carboxylic acid in a cosolvent mixture of an aliphatic hydrocarbon solvent, preferably, heptane or cyclohexane, and a secondary alcohol, preferably isopropanol. Copolymers obtained thereby, and others normally insoluble in water, can be solubilized in a mixture of water and an aliphatic oxygen-containing compound.

Carboxyvinyl polymer having Newtonian viscosity

A carboxyvinyl polymer having Newtonian viscosity, ophthalmic preparations containing the polymer, a process for preparing the polymer, and a vehicle for ophthalmic preparations containing the polymer. By using the polymer in a vehicle, an ophthalmic preparation having a low viscosity and a desirable permeability of a drug can be obtained.

Process for production of water-absorbing resin particles, water-absorbing resin particles, water-stopping material, and absorbent article

The present invention provides a method for producing water-absorbing resin particles having high equilibrium swelling capacity, a high water-absorption rate or high initial swelling capacity, and an appropriate particle size that achieves good handling performance; water-absorbing resin particles obtained by the method; and a water blocking material and an absorbent article which include the water-absorbing resin particles. The present invention is a method for producing water-absorbing resin particles, which comprises: preparing a hydrogel polymer by reversed-phase suspension polymerization of a water-soluble ethylenically unsaturated monomer in a hydrocarbon solvent in the absence of an internal crosslinking agent but in the presence of a surfactant with an HLB of 8 to 12; carrying out a post-crosslinking reaction of the hydrogel polymer whose moisture content is adjusted to 30 to 110 mass % based on a water-soluble ethylenically unsaturated monomer component that composes the hydrogel ...

AQUEOUS AGROCHEMICAL SUSPENSION COMPOSITION AND DISPERSAL METHOD THEREFOR

The present invention is an aqueous suspension agrochemical composition characterized by containing pyribencarb which is an agrochemically active component, a polyacrylic acid salt, a surfactant, a thickener, and water. The present invention is a method for aerial spraying of an aqueous suspension agrochemical composition, which comprises spraying a diluted solution onto agricultural land or non-agricultural land at an amount of 8 to 32 kg/ha from an aircraft equipped with an agricultural preparation spraying function, the diluted solution being prepared by diluting the aqueous suspension agrochemical composition in water for spraying in an amount of 31 times or less the total amount of the composition on mass basis.

Water-absorbing resin particles, absorber comprising same, and absorbent article

Provided are the following: water-absorbing resin particles with which an absorber can be manufactured, the absorber enabling ample anchoring to be obtained without compromising on water absorbency; and an absorber obtained by anchoring together the water-absorbing resin particles and a fibrous base material. The present invention is: core-shell water-absorbing resin particles constituted of a core layer (P) containing a water-absorbing resin (A) and a shell layer (Q), the shell layer (Q) containing a thermoplastic resin (B) having a melting point of 50 to 180° C., and the thermoplastic resin (B) being a polymer having a hydrophobic block comprising a polyolefin; an absorber obtained by anchoring the water-absorbing resin particles to a fibrous base material (F); and an absorbent article made using such absorber.

Method For Producing Super Absorbent Polymer And Super Absorbent Polymer

The present invention relates to a super absorbent polymer having more improved absorbency under pressure and liquid permeability, and a method for producing the same. The super absorbent polymer comprises a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included on the surface cross-linked layer.

SUPER ABSORBER

In an improved superabsorbent complexed with aluminum ions, the aluminum ions are applied in the form of an aqueous solution comprising aluminum ions, which has the feature that it comprises aluminum ions in a proportion within the range of 0.5%-15% by weight (converted if appropriate to Al3+), based on the total mass of the solution, and further comprises anions of lactic acid (lactate ions) and phosphoric acid (phosphate ions), where the molar proportion of the lactate ions is within the range of 0.01-2.99 times the molar amount of Al3+ and the molar proportion of the phosphate ions is within the range of 0.01-2.99 times the molar amount of Al3+.

METHOD FOR PRODUCING WATER-ABSORBING POLYMER PARTICLES

SUPER-ABSORBING POLYMERS WITH RAPID ABSORPTION PROPERTIES AND METHOD FOR PRODUCING THE SAME

METHOD FOR THE CONTINUOUS PRODUCTION OF WATER-ABSORBENT POLYMER PARTICLES

METHOD FOR PRODUCING WATER-ABSORBING POLYMER PARTICLES

METHOD FOR PREPARING SUPERABSORBENT RESIN, AND SUPERABSORBENT RESIN

ПОРОШКОВАЯ ГИГРОСКОПИЧЕСКАЯ ПОЛИМЕРНАЯ КОМПОЗИЦИЯИ СПОСОБ ЕЕ ПОЛУЧЕНИЯ

Изобретение относится к порошковым гигроскопическим полимерным композициям и способам их получения. Задача изобретения - разработка порошковой гигроскопической полимерной композиции, имеющей низкое содержание тонкого порошка и обладающей превосходной проницаемостью для жидкостей и способностью поглощать жидкость. Предложена порошковая гигроскопическая полимерная композиция, содержащая влагопоглощающий полимер (А) с поперечно сшитой структурой, получаемой полимеризацией содержащего кислотную группу ненасыщенного мономера, включающего в качестве главного компонента акриловую кислоту и/или ее соль, причем композиция имеет такой размер частиц, что частицы в пределах от менее 850 до 150 μм (но не включая 850 μм) составляют не менее 90 мас.% от всего материала, и содержит тетра- или более высоко функциональный и немодифицированный полиол (В), представляющий собой сахарный спирт с функциональностью от 4 до 30, по крайней мере, на поверхностях, взятый в количестве от 0,01 до 20 мас.%. Предложены ...

ЭЛЕКТРООСАЖДАЕМЫЕ ВОДНЫЕ СМОЛОСОДЕРЖАЩИЕ ДИСПЕРСИИ И СПОСОБЫ ИХ ПОЛУЧЕНИЯ

Изобретения относятся к электроосаждаемым водным смолосодержащим дисперсиям и способам их получения. Данные смолосодержащие дисперсии содержат полимерный диспергатор, содержащий, по меньшей мере, частично нейтрализованный высокомолекулярный катионный акриловый полимер и катионный акриловый полимер, который отличается от полимерного диспергатора. Их можно использовать в электроосаждаемых композициях и для нанесения, по меньшей мере, частично на электропроводящую подложку. Способ нанесения покрытия из таких композиций на электропроводящую подложку включает электрофоретическое осаждение композиции электроосаждаемого покрытия и нагревание подложки с нанесенным покрытием до температуры и в течение периода времени, достаточных для отверждения электроосажденного покрытия на подложке. Способ получения электроосаждаемой водной смолосодержащей дисперсии для покрытий включает диспергирование композиции полимеризуемых мономеров с ненасыщенностью этиленового типа и свободно-радикального инициатора в ...

Water absorbent resin production method, water absorbent resin, and usage thereof

A method for producing a water absorbent resin by (i) polymerizing a monomer including an unsaturated monomer containing a carboxyl group, in the presence of an internal cross-linking agent (A) having two or more radical polymerizable unsaturated groups and in the presence of a non-polymeric internal cross-linking agent (B) having two or more functional groups each allowing formation of an ester bond or an amide bond by reacting with a carboxyl group, while crushing a cross-linked polymer hydrogel; and (ii) drying the cross-linked polymer hydrogel of step (i), wherein: an amount of the internal cross-linking agent (A) is 0.01 mol % or more and 0.2 mol % or less relative to an amount of the unsaturated monomer containing a carboxyl group, and a molar ratio (B)/(A) of the internal cross-linking agent (A) and the non-polymeric internal cross-linking agent (B) is 0.01 or more and 1.8 or less.

Methods to produce polymer nanoparticles and formulations of active ingredients

The present invention provides a composition including a polymer nanoparticle and at least one agricultural active compound incorporated with the nanoparticle, wherein the nanoparticle are less than 100 nm in diameter, and the polymer includes a polyelectrolyte.

Particulate water absorbent and process for production thereof

A particulate water absorbing agent of the present invention is a water absorbing agent containing a water absorbing resin as a main component, the particulate water absorbing agent containing a polyvalent metal cation and satisfying: (1) the polyvalent metal cation is contained in an amount between 0.001 wt % and 5 wt % relative to the amount of the water absorbing agent; (2) an absorbency without pressure (CRC) is not less than 28 (g/g) and an absorbency against pressure (AAP 4.83 kPa) is not less than 10 (g/g); (3) the absorbency against pressure and the absorbency without pressure satisfy 77≦AAP (4.83 kPa)+1.8×CRC≦100; and (4) a moisture content of the water absorbing agent is between 5 wt % and 20 wt %. This provides a water absorbing agent which has blocking resistance after moisture absorption, is excellent in stability to shock and suppresses Re-Wet when used in a diaper.

Method for re-wetting surface post-cross-linked, water-absorbent polymer particles

A process for producing water-absorbing polymer particles, wherein surface postcrosslinked water-absorbing polymer particles are remoisturized and classified, and wherein the time between remoisturization and classification is at least 15 minutes.

Low molecular weight phosphorus-containing polyacrylic acids and use thereof as dispersants

An aqueous solution of acrylic acid polymers having a total phosphorus content of organically and possibly inorganically bound phosphorus, wherein (a) a first portion of the phosphorus is present in the form of phosphinate groups bound within the polymer chain, (b) a second portion of the phosphorus is present in the form of phosphinate and/or phosphonate groups bound at the polymer chain end, (c) possibly a third portion of the phosphorus is present in the form of dissolved inorganic salts of phosphorus, wherein at least 76% of the total phosphorus content is present in the form of phosphinate groups bound within the polymer chain.

Technique for stabilizing solutions of titanium dioxide nanoparticles in acrylate polymers by means of short-pulsed uv laser irradiation

A method for preparing a colloid solution of titanium dioxide nanoparticles in a solution of acrylic resin in organic solvent includes mixing titanium dioxide nanoparticles with a solution of acrylic resin in organic solvent, so as to obtain the colloid solution. The colloid solution is subjected to a stabilization treatment suitable for preventing or reducing nanoparticle aggregation, the treatment includes irradiating the colloid solution with pulsed coherent light having a wavelength substantially comprised in the ultraviolet absorption band of the titanium dioxide nanoparticles.

Process for Producing Surface Postcrosslinked Water-Absorbing Polymer Particles

A process for producing surface postcrosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated, before, during or after the surface postcrosslinking, with at least one salt of a trivalent metal cation and a glycinate anion.

Method for the Continuous Production of Water Absorbent Polymer Particles

A process for continuously preparing water-absorbing polymer beads, comprising the drying of a polymer gel on a forced-air belt dryer, the water content of the polymer gel being used to control the forced-air belt dryer during or after the drying.

Process For Producing Thermally Surface Postcrosslinked Water-Absorbing Polymer Particles

A process for producing thermally surface postcrosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated before, during or after the thermal surface postcrosslinking with at least one complex consisting of a polyvalent metal salt and a 2-hydroxycarboxamide.

Process for producing water-absorbing polymer particles

The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization, drying the resulting polymer gel on a through circulation belt dryer, crushing the dried polymer gel, pre-grinding, separating of incompletely dried particles with a perforated plate, grinding and classifying the resulting polymer particles.

BIAXIALLY ORIENTED POLYAMIDE-BASED RESIN FILM

The invention provides a biaxially oriented polyamide-based resin film containing a polyamide-based resin together with a polyolefin-based elastomer and/or a polyamide-based elastomer. The film has the characteristics that (1) the number of Gelbo pinhole defects is not more than 5 when a twist and bend testing is carried out at 1° C. 1000 times using a Gelbo Flex tester; (2) the impact strength is not less than 0.9 J; (3) the total transmission haze value is not more than 5.0%; (4) the coefficient of static friction at a temperature of 23° C. and a relative humidity of 50% is not more than 0.7; and (5) the laminate strength of the laminated film obtained by laminating the biaxially oriented polyamide-based resin film and an unstretched polyethylene-based resin film is not less than 5.0 N/15 mm. 1. A biaxially oriented polyamide-based resin film comprising a polyamide-based resin together with a polyolefin-based elastomer and/or a polyamide-based elastomer and satisfying the following conditions (1) to (5):(1) that the number of Gelbo pinhole defects is not more than 5 when a twist and bend testing is carried out at 1° C. 1000 times using a Gelbo Flex tester;(2) that the impact strength is not less than 0.9 J;(3) that the total transmission haze value is not more than 5.0%;(4) that the coefficient of static friction at a temperature of 23° C. and a relative humidity of 50% is not more than 0.7; and(5) that the laminate strength of the laminated film obtained by laminating the biaxially oriented polyamide-based resin film and an unstretched polyethylene-based resin film is not less than 5.0 N/15 mm.2. The biaxially oriented polyamide-based resin film according to claim 1 , wherein the maximum dispersion particle diameter of the polyolefin-based elastomer and/or the polyamide-based elastomer is 0.7 to 2 μm.3. The biaxially oriented polyamide-based resin film according to claim 2 , wherein the biaxially oriented polyamide-based resin film contains 0.05 to 0.30% by mass ...

Polylactic acid resin composition

A polylactic acid resin composition containing a polylactic acid resin, glass fibers having an average aspect ratio (average fiber length/average fiber diameter) of 5 or more, and a metallic pigment, wherein the glass fibers are contained in an amount of from 2 to 35 parts by mass, and the metallic pigment is contained in an amount of from 0.1 to 8 parts by mass, based on 100 parts by mass of the polylactic acid resin. Since the polylactic acid resin composition of the present invention has excellent moldability, and is capable of providing a molded article with high designability, including a transparent surface layer and an inner layer with a lamellar texture in the nashiji patterns, the polylactic acid resin composition can be suitably used in various industrial applications, such as daily sundries, household electric appliance parts, packaging materials for household electric appliance parts, and automobile parts.

WATER-SOLUBLE FILM AND METHOD FOR MANUFACTURING SAME

The present invention provides a water-soluble film having excellent solubility in cold water, high strength, and excellent hard-water resistance. The present invention also provides a method for simply producing such a water-soluble film. One aspect of the present invention relates to a water-soluble film including a polymer containing an anionic group other than a sulfonic acid (salt) group, and a water-soluble resin. The anionic group-containing polymer excludes an acrylic acid homopolymer. Another aspect of the present invention relates to a method for producing a water-soluble film that includes a polymer containing an anionic group other than a sulfonic acid (salt) group, and a water-soluble resin. The method includes mixing a polymer containing an anionic group other than a sulfonic acid (salt) group and a water-soluble resin. 2. (canceled)3. The water-soluble film according to claim 1 ,wherein the anionic group is a carboxyl group and/or a salt thereof.4. The water-soluble film according to claim 1 ,wherein the anionic group-containing polymer has a weight average molecular weight of 2000 to 200000.5. The water-soluble film according to claim 1 ,wherein the water-soluble resin is a polyvinyl alcohol-based polymer.6. The water-soluble film according to claim 1 ,wherein the proportion of the anionic group-containing polymer is 1% by mass or more of 100% by mass of the total amount of the water-soluble resin and the anionic group-containing polymer.7. The water-soluble film according to claim 1 ,wherein the proportion of the anionic group-containing polymer is 99% by mass or less of 100% by mass of the total amount of the water-soluble resin and the anionic group-containing polymer.8. The water-soluble film according to claim 1 ,wherein the water-soluble film has a thickness of 5 to 300 μm.9. The water-soluble film according to claim 1 ,wherein the water-soluble film is used to package a chemical and/or a detergent.12. The method for producing a water-soluble ...

Absorbent cores having material free areas

An absorbent core, for use in an absorbent article, including a core wrap enclosing an absorbent material and including superabsorbent polymer particles. The core wrap includes a top side and a bottom side, and the absorbent core includes one or more area(s) substantially free of absorbent material through which the top side of the core wrap is attached to the bottom side of the core wrap, so that when the absorbent material swells the core wrap forms one or more channel(s) along the area(s) substantially free of absorbent material. The superabsorbent polymer particles have a time to reach an uptake of 20 g/g (T20) of less than 240 s as measured according to the K(t) test method.

MODIFIED SUPERABSORBENT POLYMER CONTAINING A FERTILIZER

A modified superabsorbent polymer (SAP) comprises a SAP matrix and urea in the form of crystals that is integrated into the SAP matrix. The SAP matrix and the urea are interpenetrated. A method for producing the modified SAP may comprise a) preparing a mixture comprising at least one urea solution and at least one SAP, b) swelling the SAP in the mixture, c) crystallizing the urea in the mixture obtained upon completion of step b), d) recovering the modified SAP in the mixture, and e) optionally, forming the modified SAP recovered at step d). 1. A modified superabsorbent polymer (SAP) comprising a SAP matrix and urea in the form of crystals that is integrated into the SAP matrix , the SAP matrix and the urea being interpenetrated.2. The modified SAP according to claim 1 , obtained by a method that comprises:a) preparing a mixture comprising at least one urea solution and at least one SAP;b) swelling the SAP in the mixture;c) crystallizing the urea in the mixture obtained upon completion of step b);d) recovering the modified SAP in the mixture; ande) optionally, forming the modified SAP recovered at step d).3. The modified SAP according to claim 1 , wherein the SAP is obtained from at least one compound selected from the group consisting of cellulose derivatives claim 1 , alginate and glycosaminoglycans.4. The modified SAP according to claim 1 , wherein the SAP is obtained from at least one compound from the group consisting of acrylic polymers claim 1 , methacrylic polymers claim 1 , vinyl polymers claim 1 , polyacrylamides and salts thereof claim 1 , acrylamide/acrylic acid copolymers and salts thereof claim 1 , and polyacrylonitriles.57-. (canceled)8. The modified SAP according to claim 2 , wherein the crystallization step c) is carried out by a cooling claim 2 , drying claim 2 , evaporation or lyophilization technique.9. A method of using the modified SAP according to claim 1 , comprising retaining water with the modified SAP and restituting the water to plants in ...

METHOD FOR PRODUCING GEL

Method for producing a gel having a desired strength, by performing a step of removing a part or all of a solvent. Method for producing a gel containing a water-soluble organic polymer (A), a silicate salt (B), and a dispersant (C) for the silicate salt, including a desolvation step of removing a part or all of one or more solvents selected from the group consisting of water and a water-soluble organic solvent in the gel, or gelling a gel-forming composition containing the water-soluble organic polymer (A), the silicate salt (B), the dispersant (C) for the silicate salt, and one or more solvents selected from the group consisting of water and a water-soluble organic solvent and removing a part or all of the solvent in the composition. 1. A method for producing a gel containing a water-soluble organic polymer (A) , a silicate salt (B) , and a dispersant (C) for the silicate salt , comprisinga desolvation step ofremoving a part or all of one or more solvents selected from the group consisting of water and a water-soluble organic solvent in the gel, orgelling a gel-forming composition containing the water-soluble organic polymer (A), the silicate salt (B), the dispersant (C) for the silicate salt, and one or more solvents selected from the group consisting of water and a water-soluble organic solvent and removing a part or all of the solvent in the composition.2. The method for producing a gel according to claim 1 , wherein the water-soluble organic polymer (A) is a fully or partially neutralized polyacrylate salt having a weight average molecular weight of 1 claim 1 ,000 claim 1 ,000 to 10 claim 1 ,000 claim 1 ,000.3. The method for producing a gel according to claim 1 , wherein the silicate salt (B) is water-swellable silicate salt particles selected from the group consisting of smectite claim 1 , bentonite claim 1 , vermiculite claim 1 , and mica.4. The method for producing a gel according to claim 1 , wherein the dispersant (C) is one or more selected from the ...

SUPER ABSORBENT POLYMER AND METHOD FOR PREPARING THE SAME

The present invention relates to a super absorbent polymer and a method for preparing the same. The present invention has features that it is possible to prepare a super absorbent resin that can have an improved centrifuge retention capacity (CRC) and a high absorbency under load (AUL) by controlling the shape and size of the chopper die holes during coarse pulverization of a hydrous gel phase polymer. 1. A super absorbent polymer comprising a crosslinked polymer , the crosslinked polymer being obtained by surface-crosslinking a base polymer prepared by polymerizing a water-soluble ethylene-based unsaturated monomer including an acidic group in which at least a part of the acidic group is neutralized , wherein the super absorbent polymer hasa centrifuge retention capacity (CRC) of more than 20 g/g,an absorbency under 0.9 psi load (AUL) of more than 18 g/g, and {'br': None, 'ARUL=0.3AUL(5 min)/0.3AUL(60 min)\u2003\u2003[Equation 1]'}, 'ARUL shown in the following Equation 1 of 60% to 85%in Equation 1, {'br': None, 'i': Wb', 'Wa, '0.3AUL(g/g)=[(g)−(g)]/weight(g) of the absorbent polymer\u2003\u2003[Equation 2]'}, '0.3AUL (5 min) and 0.3AUL (60 min) are the values of absorbency under load (AUL) at 5 minutes and 60 minutes shown in the following Equation 2, respectively,'}in Equation 2,Wa(g) is the sum of the weight of the absorbent polymer and the weight of the device capable of providing a load for the absorbent polymer, andWb(g) is the sum of the weight of the absorbent polymer in which moisture is absorbed after supplying water for the absorbent polymer under a load (0.3 psi) for 5 minutes or 60 minutes, and the weight of the device capable of providing a load for the absorbent polymer.2. The super absorbent polymer according to wherein {'br': None, 'sub': '1', 'sup': '1', 'R-COOM\u2003\u2003[Chemical Formula 1]'}, 'the water-soluble ethylene-based unsaturated monomer is a compound represented by the following Chemical Formula 1in Chemical Formula 1,{'sub': 1', '1', ...

Super Absorbent Resin For Absorbing Blood Or High Viscosity Liquid And Method For Preparing Same

Disclosed herein is a method for preparing a superabsorbent polymer for absorbing blood or highly viscous liquid including a) providing a superabsorbent resin; b) pre-treating the superabsorbent resin of step a) by mixing a water-soluble polyvalent cationic salt in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a); and c) surface treating the pre-treated superabsorbent resin of step b) by mixing a polycarbonic acid-based copolymer in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a). 1. A method for preparing a superabsorbent polymer for absorbing blood or highly viscous liquid , comprising:a) providing a superabsorbent resin;b) pre-treating the superabsorbent resin of step a) by mixing a water-soluble polyvalent cationic salt in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a); andc) surface treating the pre-treated superabsorbent resin of step b) by mixing a polycarbonic acid-based copolymer in an amount of 0.001 to 5.0 parts by weight, based on 100 parts by weight of the superabsorbent resin provided in step a).2. The method of claim 1 , wherein the superabsorbent resin is a superabsorbent polymer product or a superabsorbent base resin.3. The method of claim 1 , wherein the water-soluble polyvalent cationic salt comprise a cationic ion selected from the group consisting of Al claim 1 , Zr claim 1 , Sc claim 1 , Ti claim 1 , V claim 1 , Cr claim 1 , Mn claim 1 , Fe claim 1 , Ni claim 1 , Cu claim 1 , Zn claim 1 , Ag claim 1 , Pt claim 1 , Au claim 1 , and a combination thereof claim 1 , and an anion selected from the group consisting of sulfate (SO) claim 1 , sulfite (SO) claim 1 , nitrate (NO) claim 1 , metaphosphate (PO) claim 1 , phosphate (PO) claim 1 , and a combination thereof.4. The method of claim 3 , wherein the water-soluble polyvalent cationic ...

SUPER ABSORBENT POLYMER AND METHOD FOR PRODUCING SAME

The present invention relates to an olefin polymer and a method for producing the same. The super absorbent polymer can exhibit excellent absorbent properties even in a swollen state and thus exhibit excellent anti-rewetting effects. Accordingly, when the super absorbent polymer is used, it is possible to provide a sanitary material such as a diaper or a sanitary napkin which can give a smooth touch feeling even after the body fluid is discharged. 2. The super absorbent polymer of claim 1 , wherein it has a centrifuge retention capacity for a physiological saline solution of 30 to 40 g/g.3. The super absorbent polymer of claim 1 , wherein it has an absorbency under load under 0.9 psi for a physiological saline solution of 19 to 25 g/g.4. The super absorbent polymer of claim 1 , wherein it has a free swell gel bed permeability for a physiological saline solution of about 50 darcy to about 100 darcy.7. The method for producing a super absorbent polymer of claim 6 , wherein the epoxy-based surface crosslinking agent include at least one polyglycidyl ether selected from the group consisting of ethylene glycol diglycidyl ether claim 6 , propylene glycol diglycidyl ether claim 6 , butanediol diglycidyl ether claim 6 , hexanediol diglycidyl ether claim 6 , diethylene glycol diglycidyl ether claim 6 , triethylene glycol diglycidyl ether claim 6 , polyethylene glycol diglycidyl ether claim 6 , dipropylene glycol diglycidyl ether claim 6 , tripropylene glycol diglycidyl ether claim 6 , polypropylene glycol diglycidyl ether claim 6 , and glycerol triglycidyl ether.8. The method for producing a super absorbent polymer of claim 6 , wherein claim 6 , in the step of forming the surface crosslinked layer claim 6 , the surface of the base polymer powder is subjected to a first surface crosslinking at a temperature of 120 to 160° C. for 5 to 40 minutes using an epoxy-based surface crosslinking agent.9. The method for producing a super absorbent polymer of claim 6 , wherein the non- ...

AQUEOUS POLYOLEFIN DISPERSION

The invention relates to an aqueous polyolefin dispersion comprising from 50 to 100 wt. % of a aqueous dispersion A comprising the following ingredients: from 30 to 90 wt. % of A1, a copolymer of polyethylene and (meth)acrylic acid [E(M)AA] or a mixture of different copolymers of polyethylene and (meth)acrylic acid, from 10 to 70 wt. % of A2, another polymer, not being a copolymer of polyethylene and (meth)acrylic acid, or a mixture of other polymers, and from 0-15 wt. % of additive from 0 to 50 wt. % of a compound B, where compound B is a material dispersable or soluble in water and different from any of the ingredients of dispersion A wherein the wt. % of A and B is based on the solid content of the whole aqueous polyolefin dispersion and the wt % of the ingredients of dispersion A is based on the solid content of dispersion A, the sum of the wt. % of ingredients i to iii of dispersion A is 100%. 1. An aqueous polyolefin dispersion comprising a. from 30 to 90 wt. % of A1, a copolymer of polyethylene and (meth)acrylic acid [E(M)AA] or a mixture of different copolymers of polyethylene and (meth)acrylic acid,', 'b. from 10 to 70 wt. % of A2, another polymer, not being a copolymer of polyethylene and (meth)acrylic acid, or a mixture of other polymers, and', 'c. from 0-15 wt. % of additive,, 'a. from 50 to 100 wt. % of an aqueous dispersion A comprising the following ingredientsb. from 0 to 50 wt. % of a compound B, where compound B is a material dispersable or soluble in water and different from any of the ingredients of dispersion A, the wt. % of aqueous dispersion A and compound B is based on the solid content of the whole aqueous polyolefin dispersion,', 'the wt % of the ingredients of dispersion A is based on the solid content of dispersion A,', 'the sum of the wt. % of ingredients a.-c. of dispersion A is 100%, and', 'A2 comprises one or more of copolymers of ethylene and vinyl acetate (EVA), copolymers of ethylene and vinyl acetate (EVA) modified with maleic ...

CROSSLINKING AGENT COMPOSITION FOR WATER-ABSORBING RESIN

The present invention aims to provide a crosslinking agent composition for water-absorbing resins with which it is possible to produce a water-absorbing agent having a high water absorption capacity. The present invention also aims to provide a water-absorbing agent produced by crosslinking a water-absorbing resin with the crosslinking agent composition for water-absorbing resins. The present invention may include a crosslinking agent composition for water-absorbing resins containing a crosslinking agent (A) and a water absorption improver (B), wherein the water absorption improver (B) is a halohydrin compound (b1) represented by the formula (1) below or a compound (b2) containing at least one selected from the group consisting of carbonate, carbamide, carbamate, and ureide groups: 3. The crosslinking agent composition for water-absorbing resins according to claim 1 ,wherein the crosslinking agent (A) and the water absorption improver (B) are present in a weight ratio of A:B of 50:50 to 99:1.4. A water-absorbing agent claim 1 , produced by adding the crosslinking agent composition for water-absorbing resins according to to a water-absorbing resin containing a carboxylic acid group and/or a carboxylate group claim 1 , followed by heating to effect crosslinking.5. A method for producing a water-absorbing agent claim 1 , the method comprising{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'adding the crosslinking agent composition for water-absorbing resins according to to a water-absorbing resin containing a carboxylic acid group and/or a carboxylate group, followed by heating to effect crosslinking.'} The present invention relates to a crosslinking agent composition for water-absorbing resins with which it is possible to produce a water-absorbing agent having a high water absorption capacity. The present invention also relates to a water-absorbing agent produced by crosslinking a water-absorbing resin with the crosslinking agent composition for water-absorbing ...

COOLING NEUTRALIZED ACRYLIC ACID BY MEANS OF AN ABSORPTION CHILLER

The invention relates to a process for the preparation of water-absorbent polymer particles, comprising the process steps of preparing an aqueous monomer solution comprising at least partially neutralized, monoethylenically unsaturated monomers bearing carboxylic acid groups (α1) and at least one crosslinker (α3), and at least partially neutralizing acrylic acid by mixing acrylic acid with an aqueous solution of sodium hydroxide, thereby obtaining an aqueous solution of the at least partially neutralized acrylic acid; cooling the aqueous solution with a cooling liquid in a heat exchanger, wherein the cooling liquid used in the heat exchanger has been cooled in an absorption chiller in which at least a part of the heat of the heated cooling liquid obtained in the heat exchanger is consumed by the evaporation of a refrigerant liquid in a vacuum that is created by the absorption of a refrigerant vapor into an absorbent. 1. A process for the preparation of water-absorbent polymer particles , comprising the process steps of(i) preparing an aqueous monomer solution comprising at least partially neutralized, monoethylenically unsaturated monomers bearing carboxylic acid groups (α1) and at least one crosslinker (α3);(ii) optionally adding fine particles of a water-absorbent polymer to the aqueous monomer solution;(iii) adding a polymerization initiator or a at least one component of a polymerization initiator system that comprises two or more components to the aqueous monomer solution;(iv) decreasing the oxygen content of the aqueous monomer solution;(v) charging the aqueous monomer solution into a polymerization reactor;(vi) polymerizing the monomers in the aqueous monomer solution in the polymerization reactor thereby obtaining a polymer gel;(vii) discharging the polymer gel out of the polymerization reactor and optionally comminuting the polymer gel thereby obtaining polymer gel particles;(viii) drying the polymer gel particles;(ix) grinding the dried polymer gel ...

HIGH-PERFORMANCE ELECTRODES WITH A POLYMER NETWORK HAVING ELECTROACTIVE MATERIALS CHEMICALLY ATTACHED THERETO

High performance electrodes for electrochemical devices having a polymer network with an electroactive material chemically attached to a crosslinked polymer matrix are disclosed. A method includes mixing an electrode slurry and forming a polymer network within the electrode slurry. The electrode slurry includes an electroactive material, an electrically conductive filler, a plurality of polymer chains, and a plurality of chemical crosslinking precursors. Each chemically crosslinking precursor is configured to (i) chemically crosslink the plurality of polymer chains and (ii) chemically attach the electroactive material to the plurality of polymer chains. 1. A method comprising:mixing an electrode slurry including an electroactive material, an electrically conductive filler, a plurality of polyacrylic acid polymer chains, and a plurality of isocyanate chemical crosslinking precursors, each of the chemical crosslinking precursors chemically crosslinking the plurality of polymer chains and chemically attaching the electroactive material to the plurality of polymer chains; andforming a polymer network within the electrode slurry.2. The method of claim 1 , further comprising:applying the electrode slurry having the polymer network suspended therein to a current collector; anddrying the electrode slurry to thereby form an electrode.3. The method of claim 1 , further comprising grafting the plurality of chemical crosslinking precursors to the plurality of polymer chains claim 1 , the grafting including:mixing the plurality of chemical crosslinking precursors with the plurality of polymer chains to thereby form a grafting solution; andresting the grafting solution for at least about ten minutes prior to forming the polymer network such that substantially all of the plurality of chemical crosslinking precursors is grafted to the plurality of polymer chains.4. The method of claim 1 , wherein the plurality of chemical crosslinking precursors is selected from a group consisting ...

Method and apparatus for producing polyacrylic acid (salt)-based water absorbent resin

The purpose of the present invention is to provide a method for producing a water absorbent resin in which a water absorbent resin having excellent properties can be obtained effectively. The present invention relates to a method for producing a polyacrylic acid (salt)-based water absorbent resin, which includes a polymerization step of polymerizing an aqueous monomer solution containing a polymerization inhibitor, acrylic acid (salt) and an internal cross-linking agent to produce a water-containing gel-like cross-linked polymer, a gel-crushing step of performing the gel-crushing of the water-containing gel-like cross-linked polymer simultaneously with or subsequent to the polymerization to produce a particulate water-containing gel-like cross-linked polymer, and a drying step of supplying the particulate water-containing gel-like cross-linked polymer to a continuous through-flow belt-type dryer by a traverse conveyor to dry the particulate water-containing gel-like cross-linked polymer, in which the belt temperature of the traverse conveyor is 40 to 120° C. and/or the water soluble component in the particulate water-containing gel-like cross-linked polymer on the traverse conveyor is 10% by weight or less and the water soluble component is increased after the drying step.

POLYLACTIC ACID-BASED RESIN EXPANDED BEADS AND MOLDED ARTICLE THEREOF

Polylactic acid-based resin expanded beads obtained by releasing a softened, pressurized foamable resin composition, which has a polylactic acid-based resin and a physical blowing agent, to a low pressure atmosphere to foam and expand the resin composition, where the polylactic acid-based resin satisfies the conditions (1) to (3) shown below, and exhibits excellent secondary expansion properties and fusion bonding properties. A polylactic acid-based resin expanded beads molded article obtained by in-mold molding of the polylactic acid-based resin expanded beads exhibits excellent mechanical properties. 15-. (canceled)6. A process for producing polylactic acid-based resin expanded beads , comprising the steps of:dispersing polylactic acid-based resin particles in a dispersing medium contained in a pressure resisting vessel in the presence of a physical blowing agent with heating under a pressure to obtain blowing agent-impregnated foamable resin particles, andreleasing the foamable resin particles together with the dispersing medium from the pressure resisting vessel into an atmosphere having a lower pressure than that in the pressure resisting vessel to foam and expand the foamable resin particles, [{'br': None, 'MT≦30 mN\u2003\u2003(1)'}, {'br': None, 'log MT≦0.93 log η−1.75\u2003\u2003(2)'}, {'br': None, 'sub': '1/2', '4,000 sec≧CT≧600 sec\u2003\u2003(3)'}], 'wherein the polylactic acid-based resin satisfies the following conditions (1) to (3){'sup': '−1', 'sub': '1/2', 'where MT represents a melt tension [mN] of the polylactic acid-based resin at 190° C., η represents a melt viscosity [Pa·s] of the polylactic acid-based resin at 190° C. and a shear speed of 20 sec, and CTrepresents a half crystallization time [sec] of the polylactic acid-based resin at 110° C.'}7. The process as recited in claim 6 , wherein the polylactic acid-based expanded resin beads claim 6 , when measured by the below-mentioned heat flux differential scanning calorimetry claim 6 , give a ...

METHOD FOR PRODUCING WATER-ABSORBING POLYMER PARTICLES BY SUSPENSION POLYMERIZATION

A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the agglomerated base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 140 to 220° C. 1. A process for continuously producing water-absorbing polymer particles by polymerizing a monomer solution comprisinga) at least one ethylenically unsaturated monomer which bears an acid group and may have been at least partly neutralized,b) optionally one or more crosslinker,c) at least one initiator,d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer mentioned under a) ande) optionally one or more water-soluble polymer,the monomer solution suspended in a hydrophobic organic solvent during the polymerization being agglomerated during or after the polymerization in the hydrophobic organic solvent, and thermally surface postcrosslinking the resultant agglomerated polymer particles by means of an organic surface postcrosslinker, wherein the amount of crosslinker b) is selected such that the agglomerated polymer particles before the surface postcrosslinking have a centrifuge retention capacity of less than 37 g/g and the thermal surface postcrosslinking is conducted at 140 to 220° C.2. The process according to claim 1 , wherein agglomeration is effected in the hydrophobic organic solvent after the polymerization.3. The process according to claim 1 , wherein the polymerization is conducted in the presence of a chain transfer reagent.4. The process according to claim 1 , wherein the amount of crosslinker b) is selected such that the polymer particles before the surface postcrosslinking have a centrifuge retention capacity of less than 34 g/g.5. The process according to claim 1 , wherein the thermal surface postcrosslinking is conducted at 160 to 200° C.6. The process according to claim 1 , wherein the ...

KARST CHANNEL TYPE WATER INRUSH EFFICIENT-BLOCKING ULTRA-HIGH EXPANSION GROUTING MATERIAL AND PREPARATION AND USING METHODS AND APPLICATION THEREOF

A karst channel type water inrush efficient-blocking ultra-high expansion grouting material, preparation, methods and application thereof, the grouting material includes macromolecule polymer particles A and a cross-linking solidifying fluid B, wherein the macromolecule polymer particles A are an inlaid type core-shell structure, primary macromolecule water-absorbent resin serves as an inner core, part of a gelling catalyzer is attached to an the inner core surface forming a shell, and the gelling catalyzer permeates the inner core forming an inlaid structure; before use, the macromolecule polymer particle A and the cross-linking solidifying fluid B are stirred; and then obtained mixed liquid is used as the grouting material to be injected into a fracture of a rock mass fracture zone. By means of the grouting material, high-pressure large-flow karst water inrush can be efficiently treated, the blocking efficiency of water inrush is improved, and major underground engineering construction of China is further facilitated. 115-. (canceled)16. A preparation method of a karst channel type water inrush efficient-blocking ultra-high expansion grouting material , the method comprising:(1) adding a cross-linking agent into an acrylic acid solution, and then adding an active substance containing a hydrophilic group for polymerization reaction to obtain a precursor;(2) adding an initiator into the precursor obtained in step (1), heating for reaction to obtain a colloidal polymer, and smashing and drying the colloidal polymer to obtain primary macromolecule water-absorbent resin particles; and(3) uniformly spraying a gelling catalyzer onto the primary macromolecule water-absorbent resin particles, then performing drying, thus forming a shell structure with gel formed by catalyzing a cross-linking solidifying fluid B on a surface of the gelling catalyzer through cross-linking, and making part of the gelling catalyzer permeate into the primary macromolecule water-absorbent resin ...

SUPER ABSORBENT RESIN HAVING IMPROVED SOLIDIFICATION RESISTANCE, AND METHOD FOR PREPARING SAME

Disclosed are a superabsorbent polymer having improved anti-caking properties and a method of preparing the same, and the superabsorbent polymer having improved anti-caking properties includes a superabsorbent polymer, microparticles, and water, and to improve anti-caking properties of the superabsorbent polymer, the temperature of the superabsorbent polymer or water upon addition of water or the aging time upon stirring is adjusted, thereby preventing caking of the particles. 1. A method of preparing a superabsorbent polymer having improved anti-caking properties , comprising:{'sup': '2', 'a) adding a superabsorbent polymer (A) with 0.0001˜15.0 parts by weight of particles (B) having i) a BET specific surface area of 300˜1500 m/g and ii) a porosity of 50% or more, based on 100 parts by weight of the superabsorbent polymer (A); and'}b) adding the superabsorbent polymer (A) and the particles (B) obtained in a) with 0.1˜20.0 parts by weight of water (C), based on 100 parts by weight of the superabsorbent polymer (A) and the particles (B), and performing at least one of heating treatment and aging time control treatment, yielding the superabsorbent polymer having improved anti-caking properties.2. The method of claim 1 , wherein the heating treatment in b) is performed by heating claim 1 , to 26˜95° C. claim 1 , at least one selected from the group consisting of the superabsorbent polymer (A) and the particles (B); a stirrer; and water.3. The method of claim 1 , wherein the aging time control treatment in b) is performed by adding the superabsorbent polymer (A) and the particles (B) with water (C) at 15˜25° C. and then conducting aging with stirring at 5˜1500 rpm at 26˜95° C. for 1˜120 min.4. The method of claim 1 , wherein the heating treatment and the aging time control treatment in b) are performed by heating claim 1 , to 26˜95° C. claim 1 , at least one selected from the group consisting of the superabsorbent polymer (A) and the particles (B); a stirrer; and water ...

Water-absorbent resin particles

Disclosed are water-absorbent resin particles comprising a crosslinked polymer comprising a monomer unit derived from a water-soluble ethylenically unsaturated monomer, wherein an initial swelling force as measured according to a swelling force test conducted by a predetermined method is 8 N or more, and further, a ratio of the particles having a particle diameter of more than 250 μm and 850 μm or less is 70% by mass or more and a ratio of the particles having a particle diameter of 250 μm or less is 20% by mass or less, with respect to the total amount of the water-absorbent resin particles.

Super Absorbent Polymer And Preparation Method Thereof

The present invention relates to a super absorbent polymer and a preparation method thereof, the super absorbent polymer including: surface cross-linked polymer particles prepared by surface cross-linking particles of a base resin, the base resin polymerized from a monomer composition including water-soluble ethylene-based unsaturated monomers having at least partially neutralized acidic groups; and a water-soluble component, wherein the water-soluble component has a weight average molecular weight of 150,000 to 300,000 g/mol. The super absorbent polymer may have high centrifuge retention capacity and excellent permeability at the same time, while having low content of the water-soluble component. 15-. (canceled)6. A preparation method of a super absorbent polymer , comprising:preparing a monomer composition including a water-soluble ethylene-based unsaturated monomers have un-neutralized acidic groups, and a polymerization initiator, wherein the polymerization initiator has a content of 40 to 300 ppm based on the amount of water-soluble ethylene-based unsaturated monomers;adding a neutralizing agent to the monomer composition to neutralize at least some of the un-neutralized acidic groups of the water-soluble ethylene-based unsaturated monomers;preparing a hydrogel polymer by polymerizing the monomer composition, wherein a polymerization temperature ranges from 20 to 45° C.;drying the hydrogel polymer;pulverizing the dried polymer to form particles; andsurface cross-linking the particles in the presence of a surface cross-linking agent to form surface cross-linked polymer particles of the super absorbent polymer, wherein the surface cross-linking agent is present in an amount ranging from 0.15 to 0.7 wt % based on an amount of the particles.7. The preparation method of claim 6 , wherein the super absorbent polymer includes a water-soluble component included in the super absorbent polymer has a weight average molecular weight of 150 claim 6 ,000 to 300 claim 6 ,000. ...

Super Absorbent Polymer and Method for Producing Same

The present invention relates to an olefin polymer and a method for producing the same. The super absorbent polymer can exhibit excellent absorbent properties even in a swollen state and thus exhibit excellent anti-rewetting effects. Accordingly, when the super absorbent polymer is used, it is possible to provide a sanitary material such as a diaper or a sanitary napkin which can give a smooth touch feeling even after the body fluid is discharged.

REDOX STIMULATED VARIABLE-MODULUS MATERIAL

A material having a first non-zero elastic modulus capable of reversibly changing the first non-zero elastic modulus to a second non-zero elastic modulus in response to a redox reaction occurring in the material. A method of producing a material that is reversibly cyclable between a first non-zero elastic modulus and a second non-zero elastic modulus, comprising: preparing a polymer comprising both crosslinks that do not depend on metal binding and functional groups capable of having oxidation-state specific binding constants to a metal ion; and doping the polymer with a solution containing the metal ion. 1. A material having a first non-zero elastic modulus capable of reversibly changing the first non-zero elastic modulus to a second non-zero elastic modulus in response to a redox reaction occurring in the material.2. The material of wherein the redox reaction is caused by an electric potential applied across the material or by exposing the material to an oxidant or reductant.3. The material of wherein the first non-zero elastic modulus or second non-zero elastic modulus is maintained by the material after abatement of the redox reaction.4. The material of wherein the material claim 1 , in-whole or in-part claim 1 , may reversibly change from substantially the first non-zero elastic modulus to substantially the second non-zero elastic modulus and vice versa upon successive redox reactions occurring in the material claim 1 , in-whole or in-part.5. The material of wherein the material has a minimum elastic modulus and a maximum elastic modulus claim 1 , wherein each of the first non-zero elastic modulus and the second non-zero elastic modulus may consist of a value at the minimum elastic modulus claim 1 , the maximum elastic modulus or a value therebetween wherein the first non-zero elastic modulus is greater than the second non-zero elastic modulus or the first non-zero elastic modulus is less than the second non-zero elastic modulus.6. The material of wherein the ...

COMPOSITE POWDER HAVING INORGANIC POWDER IMPREGNATED WITH POROUS POLYMER, COSMETIC COMPOSITION CONTAINING SAME, AND METHOD FOR PREPARING SAME

The present invention relates to composite powder having enhanced water repellency and oil absorbency by means of even impregnation of inorganic powder particles with a super-water-repellent porous polymer. The composite powder prepared by means of a one-step spraying procedure of electro-spraying or spray drying, according to the present invention, shows super water repellency and maximized oil absorbency by means of increased porosity of porous polymethyl methacrylate (PMMA) and even impregnation with titanium dioxide (TiO) nanoparticles. 1. A composite powder having a porous polymer impregnated with an inorganic powder ,wherein the porous polymer comprises one or more selected from the group consisting of poly(methyl methacrylate) (PMMA), poly(vinyl pyrrolidone) (PVP), poly(caprolactone) (PCL), and poly(L-lactic acid) (PLLA), and{'sub': '2', 'the inorganic powder comprises one or more selected from the group consisting of titanium dioxide (TiO), zinc oxide, sericite, and iron oxide.'}2. The composite powder of claim 1 , wherein the composite powder has porous poly(methyl methacrylate) impregnated with titanium dioxide nanoparticles.3. The composite powder of claim 2 , wherein the titanium dioxide is impregnated at a content of 30 to 70% by weight claim 2 , based on the total weight of the composite powder.4. The composite powder of claim 3 , wherein the titanium dioxide is impregnated at a content of 50% by weight claim 3 , based on the total weight of the composite powder.5. The composite powder of claim 2 , wherein the titanium dioxide has an average particle diameter of 200 to 300 nm.6. The composite powder of claim 2 , wherein the porous poly(methyl methacrylate) has a specific surface area of 10 to 200 m/g.7. The composite powder of claim 2 , wherein the porous poly(methyl methacrylate) has an average pore diameter of 15 to 500 nm.8. The composite powder of claim 2 , wherein the porous poly(methyl methacrylate) has a porosity of 50 to 70%.9. A cosmetic ...

A Process for Producing Surface-Postcrosslinked Water-Absorbent Polymer Particles by Polymerizing Droplets of a Monomer Solution

The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution, wherein water-absorbent polymer particles having an average particle diameter from 420 to 700 μm, an amount of water-absorbent polymer particles having a particle size of less than 300 μm of less than 5% by weight and an amount of water-absorbent polymer particles having a particle size of more than 800 μm of less than 5% by weight are coated with at least one surface-postcrosslinker and thermal surface-postcrosslinked. 1. A process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution , comprisinga) at least one ethylenically unsaturated monomer which bears an acid group and may be at least partly neutralized,b) optionally one or more crosslinker,c) at least one initiator,d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer mentioned under a),e) optionally one or more water-soluble polymer, andf) water,in a surrounding heated gas phase or in a surrounding hydrophobic solvent, coating the water-absorbent polymer particles with at least one surface-postcrosslinker and thermal surface-postcrosslinking of the coated water-absorbent polymer particles, wherein the water-absorbent polymer particles are optionally classified prior to the coating, the water-absorbent polymer particles have an average particle diameter from 420 to 700 μm prior to the coating and after the optional classification, an amount of water-absorbent polymer particles having a particle size of less than 300 μm prior to the coating and after the optional classification is less than 5% by weight and the amount of water-absorbent polymer particles having a particle size of more than 800 μm prior to the coating and after the optional classification is less than 5% by weight.2. The process according to claim 1 , wherein the ...

GEL COMPOSITIONS, SHAPED GEL ARTICLES AND A METHOD OF MAKING A SINTERED ARTICLE

Reaction mixtures, gel compositions that are a polymerized product of the reaction mixtures, shaped gel articles that are formed within a mold cavity and that retain the size and shape of the mold cavity upon removal from the mold cavity, and sintered articles prepared from the shaped gel articles are provided. The sintered article has a shape identical to the mold cavity (except in regions where the mold cavity was overfilled) and to the shaped articles but reduced in size proportional to the amount of isotropic shrinkage. Methods of forming the sintered articles also are provided. 1. A gel composition comprising a polymerized product of a reaction mixture comprising:{'sub': '2', 'a. 20 to 60 weight percent zirconia-based particles based on a total weight of the reaction mixture, the zirconia-based particles having an average particle size no greater than 100 nanometers and comprising at least 70 mole percent ZrO;'}b. 30 to 75 weight percent of a solvent medium based on the total weight of the reaction mixture, the solvent medium comprising at least 60 percent of an organic solvent having a boiling point equal to at least 150° C.;c. 2 to 30 weight percent polymerizable material based on the total weight of the reaction mixture, the polymerizable material comprising (1) a first surface modification agent having a free radical polymerizable group; andd. a photoinitiator for a free radical polymerization reaction.2. The gel composition of claim 1 , wherein the solvent medium comprises at least 80 weight percent of the organic solvent having the boiling point equal to at least 150° C.4. The gel composition of claim 1 , wherein the zirconia-based particles are crystalline and wherein at least 80 weight percent of the zirconia-based particles have a cubic structure claim 1 , tetragonal structure claim 1 , or a combination thereof.5. The gel composition of claim 1 , wherein the first surface modification agent having a free radical polymerizable group further has a ...

METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBING AGENT, AND WATER ABSORBING AGENT

The present invention relates to an absorbent suitable for use in a thin sanitary material/absorbent article having a high absorbent content and not prone to gel blocking, the absorbent having excellent liquid diffusibility (e.g. SFC) and minimal decrease in absorption ratio under pressure (e.g., AAP or PUP) even when a liquid permeation enhancer is added, and to a method for manufacturing the high-performance absorbent stably during actual production. The method is a method for manufacturing a polyacrylic acid (salt)-based absorbent, having a surface-crosslinking agent addition step for adding a solution of a surface-crosslinking agent, and a liquid permeation enhancer addition step for adding a liquid permeation enhancer, the liquid permeation enhancer addition step being performed after and/or at the same time as the surface-crosslinking agent addition step, the method characterized in that a surface crosslinking step for performing heat treatment in an atmosphere having a dew point of 45° C. to 100° C. is performed after or at the same time as the surface-crosslinking agent addition step. 1. A method for producing a polyacrylic acid (salt)-based water absorbing agent , comprising:a surface crosslinking agent addition step of adding a surface crosslinking agent solution;a liquid permeability enhancer addition step of adding a liquid permeability enhancer, the liquid permeability enhancer addition step being performed simultaneously with and/or after the surface crosslinking agent addition step; anda surface crosslinking step of carrying out a heat treatment in conditions in which an atmospheric dew point is at least in a range of 45° C. to 100° C., the surface crosslinking step being performed simultaneously with or after the surface crosslinking agent addition step.2. The method as set forth in claim 1 , whereinduring the heat treatment in the surface crosslinking step, an upper limit of a temperature of a water absorbent resin powder is 175° C. to 300° C.3. The ...

A PROCESS FOR PRODUCING SURFACE-POSTCROSSLINKED WATER-ABSORBENT POLYMER PARTICLES BY POLYMERIZING DROPLETS OF A MONOMER SOLUTION

The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution, wherein water-absorbent polymer particles having an average particle diameter from 150 to 400 μηη, an amount of water-absorbent polymer particles having a particle size of less than 100 μηη of less than 5% by weight and an amount of water-absorbent polymer particles having a particle size of more than 500 μηη of less than 5% by weight are coated with at least one surface-postcrosslinker and thermal surface-postcrosslinked. 1. A process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution , comprisinga) at least one ethylenically unsaturated monomer which bears an acid group and optionally is at least partly neutralized,b) optionally one or more crosslinker,c) at least one initiator,d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer mentioned under a),e) optionally one or more water-soluble polymer, andf) water,in a surrounding heated gas phase or in a surrounding hydrophobic solvent, coating the water-absorbent polymer particles with at least one surface-postcrosslinker and thermal surface-postcrosslinking of the coated water-absorbent polymer particles, wherein the water-absorbent polymer particles are optionally classified prior to the coating, the water-absorbent polymer particles have an average particle diameter from 150 to 400 μm prior to the coating and after the optional classification, the amount of water-absorbent polymer particles having a particle size of less than 100 μm prior to the coating and after the optional classification is less than 5% by weight and the amount of water-absorbent polymer particles having a particle size of more than 500 μm prior to the coating and after the optional classification is less than 5% by weight.2. The process according to claim 1 , ...

Super Absorbent Resin Having Improved Solidification Resistance, And Method For Preparing Same

Disclosed are a superabsorbent polymer having improved anti-caking properties and a method of preparing the same, and the superabsorbent polymer having improved anti-caking properties includes a superabsorbent polymer, microparticles, and water, and to improve anti-caking properties of the superabsorbent polymer, the temperature of the superabsorbent polymer or water upon addition of water or the aging time upon stirring is adjusted, thereby preventing caking of the particles. 1. A method of preparing a superabsorbent polymer having improved anti-caking properties , comprising:performing heating treatment on at least one of a superabsorbent polymer, particles, or water to form heated components, wherein the superabsorbent polymer, the particles, and the water are components; andmixing the heated components together, or mixing the heated components with the remaining unheated components, to prepare a superabsorbent polymer having improved anti-caking properties,{'sup': '2', 'wherein the particles are present in an amount of 0.0001 15.0 parts by weight, based on 100 parts by weight of the superabsorbent polymer, and wherein the particles have a BET specific surface area of 300 1500 m/g and a porosity of 50% or more, and'}wherein the water is present in an amount of 0.1 20.0 parts by weight based on 100 parts by weight of the superabsorbent polymer and the particles.2. The method of claim 1 , wherein the heating treatment is performed by heating claim 1 , to a temperature ranging from 26° C. 95° C.3. (canceled)4. The method of claim 1 , further comprising:adding the particles to the superabsorbent polymer to form a composition;performing the heating treatment on at least one of the composition or the water to a temperature ranging from 26° C. 95° C.; andthen mixing the water with the composition to form the superabsorbent polymer having anti-caking properties.5. The method of claim 1 , wherein the particles are present in an amount of 0.001 20 parts by weight based on ...

SUPER ABSORBENT POLYMER AND PREPARATION METHOD THEREOF

The present invention relates to a super absorbent polymer and a preparation method thereof, the super absorbent polymer including: surface cross-linked polymer particles prepared by surface cross-linking particles of a base resin, the base resin polymerized from a monomer composition including water-soluble ethylene-based unsaturated monomers having at least partially neutralized acidic groups; and a water-soluble component, wherein the water-soluble component has a weight average molecular weight of 150,000 to 300,000 g/mol. The super absorbent polymer may have high centrifuge retention capacity and excellent permeability at the same time, while having low content of the water-soluble component. 1. A super absorbent polymer , comprising:surface cross-linked polymer particles prepared by surface cross-linking particles of a base resin, the base resin polymerized from a monomer composition including water-soluble ethylene-based unsaturated monomers having at least partially neutralized acidic groups; anda water-soluble component, wherein the water-soluble component has a weight average molecular weight of 150,000 to 300,000 g/mol.2. The super absorbent polymer of claim 1 , wherein the water-soluble component has a content of 5 to 20 wt % claim 1 , based on the total weight of the super absorbent polymer claim 1 , as measured by the EDANA WSP 270.2 method.3. The super absorbent polymer of claim 1 , wherein a centrifuge retention capacity is 20 to 35 g/g as measured by the EDANA WSP 241.2 method.4. The super absorbent polymer of claim 1 , wherein an absorbency under load is 20 to 30 g/g as measured by the EDANA WSP 242.2 method.5. The super absorbent polymer of claim 1 , wherein a permeability of the super absorbent polymer measured according to the following Equation 1 is 10 to 150 seconds:{'br': None, 'i': T', 'B, 'Permeability (sec)=1−\u2003\u2003[Equation 1]'}T1 represents a time required for decreasing a liquid level height from 40 ml up to 20 ml under a load of ...

METHOD TO GENERATE AND DISPERSE NANOSTRUCTURES IN A COMPOSITE MATERIAL

A method of making a nanostructure-reinforced composite comprises providing matrix particles in a reactor; fluidizing the matrix particles; introducing a nanostructure material into the reactor; homogeneously dispersing the nanostructure material; uniformly depositing the nanostructure material on the matrix particles to form a composite powder; generating a nanostructure on the matrix particles from the nanostructure material; and processing the composite powder to form the nanostructure-reinforced composite having a matrix formed from the matrix particles. The nanostructures are evenly distributed in the matrix of the nanostructure-reinforced composite. 1. A method of making a composite powder comprising:providing matrix particles in a reactor, the matrix particles comprising a metal oxide, metal carbide, polymer, ceramic, plastic, glass, graphene, graphite, or a combination thereof;fluidizing the matrix particles;introducing a nanostructure material into the reactor;homogeneously dispersing the nanostructure material; anduniformly depositing the nanostructure material on the matrix particles to form the composite powder.2. The method of claim 1 , wherein the matrix particles are the polymer selected from polyphenylene claim 1 , polyacetylene claim 1 , polypyrrole claim 1 , polythiophene claim 1 , polyester claim 1 , polyethylene claim 1 , polyacrylate claim 1 , polypropylene claim 1 , polyamide claim 1 , polyimide claim 1 , polybenzoxazole claim 1 , poly(amino acid) claim 1 , epoxy claim 1 , polystyrene claim 1 , polybutadiene claim 1 , polycarbonate claim 1 , or a combination thereof.3. The method of claim 1 , wherein the matrix particles are the ceramic selected from an oxide-based ceramic claim 1 , nitride-based ceramic claim 1 , carbide-based ceramic claim 1 , boride-based ceramic claim 1 , silicide-based ceramic claim 1 , or a combination thereof.4. The method of claim 1 , wherein the matrix particles are about 0.5 μm to about 500 μm.5. The method of claim 1 ...

Water-absorbing polymer particles

Water-absorbing polymer particles are formed from crosslinked polymer chains comprising predominantly polymerized units of at least partly neutralized acrylic acid. They have a) a proportion of particles having a particle size of 150 to 300 μm of at least 20% by weight, b) a free swell rate of the entirety of the polymer particles FSRof at least 0.25 g/g·s, c) a difference ΔFSR of at least 0.15, d) a centrifuge retention capacity CRC of at least 25.0 g/g, and e) a permeability of the swollen gel bed SFC of at least 90×10cm·s/g. ΔFSR is defined as =ΔFSR=FSR−FSR 1. Water-absorbing polymer particles formed from crosslinked polymer chains comprising predominantly polymerized units of at least partly neutralized acrylic acid , characterized bya) a proportion of particles having a particle size of 150 to 300 μm of at least 20% by weight,{'sub': 'overall', 'b) a free swell rate of the totality of the polymer particles FSRof at least 0.25 g/g·s,'} {'br': None, 'sub': 150-300 μm', 'overall, 'ΔFSR=FSR−FSR'}, 'c) a difference ΔFSR of at least 0.15, where ΔFSR is defined as'}{'sub': '150-300 μm', 'in which FSRrepresents the free swell rate of the polymer particles having a particle size of 150 to 300 μm,'}d) a centrifuge retention capacity CRC of at least 25.0 g/g, and{'sup': −7', '3, 'e) a permeability of the swollen gel bed SFC of at least 90×10cm·s/g.'}2. Polymer particles according to claim 1 , characterized by a proportion of particles having a particle size of 150 to 300 μm of at least 25% by weight.3. Polymer particles according to claim 1 , characterized by a proportion of particles having a particle size of 150 to 300 μm of at most 80% by weight.4. Polymer particles according to claim 1 , characterized by a proportion of particles having a particle size of less than 150 μm of at most 5% by weight.5. Polymer particles according to claim 1 , characterized by a proportion of particles having a particle size of more than 710 μm of at most 5% by weight.6. Polymer particles ...

ATTRITION-RESISTANT SUPERABSORBENT POLYMER AND METHOD FOR PRODUCING SAME

Disclosed is an attrition-resistant superabsorbent polymer, including a superabsorbent polymer, porous superhydrophobic microparticles, and water, thus increasing moisture content of the superabsorbent polymer and a method of manufacturing the attrition-resistant superabsorbent polymer is also provided. 1. An attrition-resistant superabsorbent polymer , comprising:{'sup': '2', 'a superabsorbent polymer (A), particles (B) having i) a BET specific surface area of 300˜1500 m/g and ii) a porosity of 50% or more, and water (C),'}wherein the particles (B) are contained in an amount of 0.0001˜15 parts by weight based on 100 parts by weight of the superabsorbent polymer (A), and the water (C) is contained in an amount of 0.1˜20.0 parts by weight based on 100 parts by weight of the superabsorbent polymer (A) and the particles (B).2. The attrition-resistant superabsorbent polymer of claim 1 , wherein the particles (B) are contained in an amount of 0.001˜2.0 parts by weight based on 100 parts by weight of the superabsorbent polymer (A).3. The attrition-resistant superabsorbent polymer of claim 1 , wherein the particles (B) are contained in an amount of 0.05˜0.15 parts by weight based on 100 parts by weight of the superabsorbent polymer (A).4. The attrition-resistant superabsorbent polymer of claim 1 , wherein the water (C) is contained in an amount of 1.0˜10.0 parts by weight based on 100 parts by weight of the superabsorbent polymer (A) and the particles (B).5. The attrition-resistant superabsorbent polymer of claim 1 , wherein the water (C) is contained in an amount of 2.5˜7.5 parts by weight based on 100 parts by weight of the superabsorbent polymer (A) and the particles (B).6. The attrition-resistant superabsorbent polymer of claim 1 , wherein the particles (B) have a particle size ranging from 2 nm to 50 μm.7. The attrition-resistant superabsorbent polymer of claim 1 , wherein the particles (B) have superhydrophobicity with a water contact angle of 125° or more.8. The ...

DEPOLYMERIZATION OF POLYMERS

Provided herein is technology relating to depolymerization of polymers and particularly, but not exclusively, to methods and systems for de-crosslinking polyacrylate salt-based polymers and other polymers and compositions made from de-crosslinking polyacrylate salt-based polymers and other polymers. 1. A method for producing polyacrylic acid (PAA) from a superabsorbent polymer (SAP) , said method comprising sonicating an aqueous SAP hydrogel to produce said PAA.2. The method of further comprising adding base to said aqueous SAP hydrogel.3. The method of further comprising adding NaOH to said aqueous SAP hydrogel.4. The method of wherein said sonicating provides an ultrasonic frequency.5. The method of wherein said sonicating provides a frequency of 20 kHz.6. The method of wherein said method recovers at least 85% of said SAP as PAA.7. The method of wherein said aqueous SAP hydrogel comprises at least 0.50% claim 1 , 1.0% claim 1 , 2.5% claim 1 , or 5.0% weight per volume SAP.8. The method of wherein said PAA has a Mof approximately 50 to 2500 kg/mol.9. The method of wherein said PAA has a dispersity of approximately 1.0 to 10.0.10. The method of wherein the maximum specific energy of said sonicating is less than or equal to 50 MJ/kg SAP.11. The method of wherein said sonicating is performed for at least 1 to 25 minutes.12. The method of further comprising obtaining said SAP from a post-consumer source or a post-industrial source.1334-. (canceled)35. A method for recycling superabsorbent polymer (SAP) claim 1 , said method comprising:a) obtaining SAP from a post-consumer and/or post-industrial source; andb) sonicating said SAP to produce polyacrylic acid (PAA).36. The method of further comprising adding NaOH to said SAP.37. The method of further comprising producing a new SAP from said PAA.38. The method of further comprising producing an adhesive from said PAA.39. The method of wherein said post-consumer source comprises a personal disposable hygiene product. This ...

Recycling of Superabsorbent Polymer Via Hydrothermal Microwave Processing

Poly(acrylic acid)-based superabsorbent polymer (SAP) and HOin a feed is converted with microwave (MW) irradiation into poly(acrylic acid) (PAA) in the product. The MW total energy used to convert SAP into PAA is less than 50 MJ/kg SAP. 1. A method for degrading a superabsorbent polymer (SAP) to poly(acrylic acid) (PAA) comprising placing a feed into a reactor , irradiating said feed with microwave (MW) at a temperature , and producing a product comprising said PAA at a carbon yield; wherein said feed comprises said SAP at a concentration greater than about 3 wt % and hydrogen peroxide (HO) at a concentration greater than about 0.5 wt % of said SAP concentration; wherein said feed has a residence time in said reactor between about 2 min and about 9 min; wherein said temperature is about 200° C.; wherein said carbon yield is greater than about 90%; and wherein said MW used to convert SAP to PAA requires a MW total energy of less than about 50 MJ/kg SAP.2. The method of claim 1 , wherein said residence time is between about 4 min and about 6 min.3. The method of claim 1 , wherein said residence time is about 5 min.4. The method of claim 1 , wherein said SAP concentration is greater than about 5 wt %.5. The method of claim 1 , wherein said SAP concentration is greater than about 10 wt %.6. The method of claim 1 , wherein said MW total energy is less than about 12 MJ/kg SAP.7. The method of claim 1 , wherein said MW total energy is less than about 6 MJ/kg SAP.8. The method of claim 1 , wherein said SAP has degree of neutralization (DN) greater than about 50%.9. The method of claim 1 , wherein said SAP has DN between about 65% and about 75%.10. The method of claim 1 , wherein said carbon yield is greater than 95%.11. The method of claim 1 , wherein said carbon yield is about 98%.12. The method of claim 1 , wherein said PAA has a weight-average molecular weight less than about 1 claim 1 ,000 claim 1 ,000 g/mol.13. The method of claim 1 , wherein said PAA has a weight- ...

DEGRADATION OF SUPERABSORBENT POLYMER VIA OXIDATIVE DEGRADATION

A method for degrading crosslinked and poly(acrylic acid)-based superabsorbent polymer (SAP) into soluble polyacrylic acid polymers is disclosed. Degradation is achieved with an oxidative water-soluble salt comprising at least one cation and at least one anion. 1. A method for degrading crosslinked and poly(acrylic acid)-based superabsorbent polymer (SAP) into soluble polyacrylic acid polymers , comprising:a) providing SAP;b) providing an oxidative water-soluble salt comprising at least one cation and at least one anion;c) providing an aqueous carrier;d) mixing the SAP with the oxidative water-soluble salt and the aqueous carrier; ande) heating the mixture to a temperature of from about 30° C. to about 200° C. to degrade the SAP into soluble polyacrylic acid polymers.2. The method of claim 1 , wherein the oxidative water-soluble salt is dissolved in the aqueous carrier prior to method step d) or in method step d).3. The method of claim 2 , wherein at least about 50 weight-% of the aqueous carrier claim 2 , with the oxidative water-soluble salt dissolved therein claim 2 , is absorbed into the SAP in method step d) and/or e).4. The method of claim 3 , wherein the SAP has absorbed a total amount of liquid of from about 5 g to about 25 g per about 1 gram of SAP claim 3 , wherein the total amount of liquid is the sum of the amount of liquid comprised in the SAP provided in step a) and the amount of aqueous carrier absorbed in method steps d) and e).5. The method of claim 1 , wherein the amount of aqueous carrier provided in method step c) enables the SAP provided in step a) to swell to at least about 20% claim 1 , of the SAP's CRC upon absorption of all aqueous carrier provided claim 1 , wherein the CRC is measured according to EDANA method NWSP 241.0.R2.6. The method of claim 1 , wherein the at least one anion is selected from the group consisting of: peroxydisulfate claim 1 , peroxymonosulfate claim 1 , peroxydicarbonate claim 1 , peroxydiphosphate claim 1 , ...

SUPER ABSORBENT RESIN

The present invention relates to a super absorbent resin, and the super absorbent resin can exhibit a fast absorption rate and high gel strength even in a partially swollen state through the size optimization of partially swollen gel particles. Therefore, the use of the super absorbent resin can effectively prevent a rewetting phenomenon. 1. A superabsorbent polymer having an average particle size of 300 μm to 600 μm , wherein a gel , which is obtained by swelling 1 g of the superabsorbent polymer in 20 g of 0.9% by weight of a sodium chloride aqueous solution for 10 minutes , has an average particle size of 600 μm to 1000 μm.2. The superabsorbent polymer of claim 1 , wherein a particle having a particle size of 300 μm to 600 μm is 45% by weight to 85% by weight.3. The superabsorbent polymer of claim 1 , wherein a particle having a particle size of more than 0 μm and 300 μm or less is 15% by weight to 25% by weight.4. The superabsorbent polymer of claim 1 , wherein a fraction of a gel having a particle size of more than 0 μm and 600 μm or less is 5% by weight to 30% by weight.5. The superabsorbent polymer of claim 1 , wherein centrifuge retention capacity in a physiological saline solution is 28 g/g to 35 g/g claim 1 , absorbency under load of 0.9 psi in the physiological saline solution is 14 g/g to 22 g/g claim 1 , free swell gel bed permeability in the physiological saline solution is 40 darcy to 100 darcy claim 1 , and a vortex time is 20 seconds to 60 seconds.6. A preparation method comprising the steps of: performing crosslinking polymerization of a monomer mixture in the presence of an internal crosslinking agent to form a water-containing gel polymer claim 1 , the monomer mixture including water-soluble ethylene-based unsaturated monomers having acidic groups which are at least partially neutralized claim 1 , a foaming agent claim 1 , a foam promoter claim 1 , and a surfactant; drying claim 1 , pulverizing claim 1 , and size-sorting the water-containing gel ...

Superabsorbent Polymer And Preparation Method For The Same

A method of preparing a superabsorbent polymer includes preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked; and heating the base resin in the presence of a surface crosslinking agent to carry out surface modification of the base resin, wherein the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent weight of 100 g/eq or more to less than 130 g/eq, and a second epoxy crosslinking agent having an epoxy equivalent weight of 130 g/eq or more. A superabsorbent polymer having improved rewetting property liquid permeability is also provided. 1. A method of preparing a superabsorbent polymer comprising:preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked; andheating the base resin in the presence of a surface crosslinking agent to carry out surface modification of the base resin,wherein the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent weight of 100 g/eq or more to less than 130 g/eq, and a second epoxy crosslinking agent having an epoxy equivalent weight of 130 g/eq or more.2. The method of claim 1 , wherein the second epoxy crosslinking agent has an epoxy equivalent weight of 150 g/eq to 400 g/eq.3. The method of claim 1 , wherein the first epoxy crosslinking agent and the second epoxy crosslinking agent are included in an amount of 0.01 part by weight to 0.5 parts by weight claim 1 , respectively claim 1 , with respect to 100 parts by weight of the acrylic acid-based monomer.4. The method of claim 1 , wherein a weight ratio of first epoxy crosslinking agent:second epoxy crosslinking agent is 1:1 to 30:1.5. The method of claim 1 , wherein the first epoxy crosslinking agent is ethylene glycol diglycidyl ether claim 1 , diethylene glycol ...

Method for Producing Water-Absorbing Polymer Particles

A process for producing water-absorbing polymer particles is provided, comprising a) a polymerization step in which an aqueous monomer solution comprising at least one ethylenically unsaturated monomer M which bears acid groups and may have been at least partly neutralized and at least one crosslinker is polymerized to obtain an aqueous polymer gel; b) a pelletization step in which the aqueous polymer gel having a solids content of 35 to 70% by weight and a temperature of 75 to 125° C. is forced from a high-pressure zone through a die plate into a low-pressure zone and pellets are obtained, the pressure differential between the high-pressure zone and the low-pressure zone being 4 to less than 14 bar and the orifice ratio of the die plate being 30 to 80%; c) a drying step in which the pellets are dried to a moisture content of less than 10% by weight; d) a grinding step and a classifying step to obtain water-absorbing polymer particles; and e) surface crosslinking of the water-absorbing polymer particles. The water-absorbing polymer particles have a high swell rate and a high retention capacity combined with a favorable ratio of permeability of the swollen gel bed SFC to centrifuge retention capacity CRC. 1. A process for producing water-absorbing polymer particles , comprisinga) a polymerization step in which an aqueous monomer solution comprising at least one ethylenically unsaturated monomer M which bears an acid group and optionally has been at least partly neutralized and at least one crosslinker are polymerized to obtain an aqueous polymer gel;b) a pelletization step in which the aqueous polymer gel having a solids content of 35 to 70% by weight and a temperature of 75 to 125° C. is forced from a high-pressure zone through a die plate into a low-pressure zone and pellets are obtained, the pressure differential between the high-pressure zone and the low-pressure zone being 4 to less than 14 bar and the orifice ratio of the die plate being 30 to 80%;c) a drying ...

Method For Separating And Purifying Polymers From Reclaimed Product

A method for separating and purifying polymers of a reclaimed product (rP) is disclosed. The rP is contacted at an elevated temperature and pressure, with an extraction solvent to produce an extracted rP (erP). A solvent, at conditions sufficient to solubilize the first polymer, contacts the erP to produce a solution, which is purified at an elevated temperature and pressure by contacting it with a solid medium to produce a purified solution of the first polymer. The purified polymer is then separated from the purified solution, and the method steps are repeated until all polymers are separated and purified. 2. The method of claim 1 , wherein said rP is a reclaimed film (rF).3. The method of claim 2 , wherein said rF comprises at least 2 polymers.4. The method of claim 1 , wherein said rP is a reclaimed absorbent hygiene product (rAHP).5. The method of claim 4 , wherein said method comprises:a. obtaining an rAHP; wherein said rAHP is selected from the group consisting of post-consumer use products, post-industrial use products, and combinations thereof;b. extracting said rAHP with an extraction solvent at a temperature greater than about 100° C. and at a pressure greater than about 150 psig (1 MPa); wherein said extraction solvent has a standard boiling point less than about 70° C.; whereby an extracted rAHP (erAHP) is produced; and wherein said extractable materials have a concentration in said erAHP which is lower than said concentration of said extractable materials in said rAHP;c. dissolving a first dissolvable base polymer of said rAHP by contacting said erAHP with a dissolving step solvent at a temperature range and a pressure range sufficient to cause said first dissolvable base polymer to solubilize in said dissolving step solvent; whereby producing an initial suspension; wherein said initial suspension comprises a suspension of said particulate additives associated with said first dissolvable polymer, and domains of all remaining polymers in a first ...

RESIN BINDER COMPOSITION AND FILTER MEDIUM COMPRISING THE RESIN BINDER COMPOSITION

The present invention relates to a resin binder composition, a filter medium comprising the resin binder composition as well as related methods and uses. 1. A resin binder composition comprising:i) at least one resin P containing in the form of polymerized units at least one ethylenically unsaturated monomer M, wherein the monomer M optionally comprises further functional groups,ii) at least one aminoplast resin and/or at least one phenoplast resin,iii) at least one urea derivate and/or urea, andiv) optionally at least one additive.2. The resin binder composition according to claim 1 , wherein the ethylenically unsaturated monomer M is selected from the group consisting of acrylic acid claim 1 , methacrylic acid or the salts thereof claim 1 , acrylamide or mixtures thereof.3. The resin binder composition according to or claim 1 , comprising:i) 8 to 98.5% by weight of at least one resin P,ii) 1 to 62% by weight of at least one aminoplast resin and/or at least one phenoplast resin, andiii) 0.5 to 30% by weight of at least one urea derivative and/or urea, based on the total weight of the dry solid content of the resin binder composition.4. The resin binder composition according to any of the to claim 1 , wherein the at least one aminoplast resin is selected from the group consisting of urea formaldehyde resins claim 1 , melamine formaldehyde resins claim 1 , melamine polyesters and melamine phenol formaldehyde resins.5. The resin binder composition according to any of the to claim 1 , wherein the at least one phenoplast resin is selected from the group consisting of resole resins and novolac resins.6. The resin binder composition according to any of the to claim 1 , wherein the at least one ethylenically unsaturated monomer M is acrylic acid.7. The resin binder composition according to any one of to claim 1 , wherein the at least one additive comprises a flame retardant.8. A filter medium comprising:a) at least one layer L, and{'claim-ref': [{'@idref': 'CLM-00001', ' ...

Hard coat film

A high-hardness hard coat film having a reduced degree of curling and an ionizing ray polymerizable resin composition for forming the hard coat layer of such a hard coat film are provided. The hard coat film includes a resin film and a hard coat layer disposed on the surface of the resin film. The hard coat layer is formed of a cured product of a photopolymerizable composition containing an acrylic component, a hyperbranched acrylate resin, a silicone component, and silica particles. The cured product is produced by exposure to ionizing rays.

ANODE FOR NONAQUEOUS ELECTROLYTE SECONDARY CELL

An anode for a nonaqueous electrolyte secondary cell that can improve the cycle characteristics. In the anode for a nonaqueous electrolyte secondary cell, by modifying the surface of an active material with a polymer containing a carboxyl group, followed by bonding to a crosslinking binder, a stable SEI layer is formed and thus a mixture layer with high mechanical strength is provided, thereby better preventing detachment of the active material due to a volume change caused by charging and discharging, and thus providing an electrode for a secondary cell with good cycle characteristics. 1. An anode for a nonaqueous electrolyte secondary cell , comprising:an active material layer of an electrode, including a binder containing: an aqueous polysaccharide polymer having a carboxyl group, and an aqueous polymer having a carboxyl group with a number average molecular weight of 300,000 or less; andwherein crosslinking treatment is applied to the aqueous polysaccharide polymer having a carboxyl group.2. The anode for a nonaqueous electrolyte secondary cell of claim 1 , wherein:the aqueous polysaccharide polymer having a carboxyl group is completely neutralized, andthe aqueous polymer having a carboxyl group is an acidic polymer.3. The anode for a nonaqueous electrolyte secondary cell of claim 1 , wherein:the aqueous polysaccharide polymer having a carboxyl group is a sodium alginate.4. The anode for a nonaqueous electrolyte secondary cell of claim 1 , wherein:the aqueous polymer having a carboxyl group is a polyacrylic acid.5. The anode for a nonaqueous electrolyte secondary cell of claim 1 , wherein:{'sub': 'x', 'the active material in the active material layer of the electrode contains SiO.'} This application is a continuation application filed under 35 U.S.C. §111(a) claiming the benefit under 35 U.S.C. §§120 and 365(c) of International Application No. PCT/JP2016/064466, filed May 16, 2016, which is based upon and claims the benefit of priority of Japanese Patent ...

ORGANIC POLYMERIC PARTICLES, PAPER COATING COMPOSITIONS AND METHODS

A method of forming an organic polymeric particle, comprising (i) forming a core of an organic hydrophilic polymer with monomers that contains an acid group, a latent acid group, or a combination thereof; (ii) forming a shell that comprises an organic polymer with monomers that contains an acid group, a latent acid group, or a combination thereof to encapsulate the core, where the shell has an initial size; expanding the core to form a hollow porous structure from the shell, where the hollow porous structure has an expanded size larger than an initial size of the shell; and (iii) hydrolyzing the acid group, the latent acid group or the combination thereof of the hollow porous structure and the organic hydrophilic polymer to give the organic polymeric particle a void volume fraction of 40 percent to 85 percent. 1. A method of forming an organic polymeric particle , comprising:(i) forming a core of an organic hydrophilic polymer with monomers that contains an acid group, a latent acid group, or a combination thereof;(ii) forming a shell that comprises an organic polymer with monomers that contains an acid group, a latent acid group, or a combination thereof to encapsulate the core, where the shell has an initial size; expanding the core to form a hollow porous structure from the shell, where the hollow porous structure has an expanded size larger than an initial size of the shell; and(iii) hydrolyzing the acid group, the latent acid group or the combination thereof of the hollow porous structure and the organic hydrophilic polymer to give the organic polymeric particle a void volume fraction of 40 percent to 85 percent.2. The method of claim 1 , where hydrolyzing the acid groups claim 1 , latent acid groups or the combination thereof of the hollow porous structure forms pores in the hollow porous structure.3. The method of claim 2 , including adjusting a size of the pores in the hollow porous structure by adjusting an amount of the acid group claim 2 , the latent acid ...

HYDROGEL-ENCAPSULATED BETA CELLS, BETA-CELL ENCAPSULATION PROCESS, AND USES THEREOF

Embodiments of the present disclosure generally relate to compositions comprising hydrogel-encapsulated/dispersed beta cells, compositions comprising hydrogel-encapsulated/dispersed beta-cell spheroids, processes for forming such compositions, and uses of the compositions. In an embodiment, a composition is provided that includes a first component comprising a hydrogel, the hydrogel comprising, in polymerized form, one or more photoreactive monomers and a thiol linker. The composition further comprises a second component comprising a plurality of beta cells dispersed or encapsulated within the hydrogel. 1. A composition , comprising:a first component comprising a hydrogel, the hydrogel comprising, in polymerized form, one or more photoreactive monomers and a thiol linker; anda second component comprising a plurality of beta cells dispersed or encapsulated within the hydrogel.2. The composition of claim 1 , wherein at least a portion of the plurality of beta cells are in the form of beta-cell spheroids claim 1 , beta-cell spheroid-like structures claim 1 , or a combination thereof.3. The composition of claim 1 , wherein:the hydrogel is in the form of a microparticle; andan average diameter of the microparticle is about 2,000 μm or less.4. The composition of claim 1 , wherein the one or more photoreactive monomers comprise a methylene functional group claim 1 , an acid functional group claim 1 , or combinations thereof.5. The composition of claim 4 , wherein claim 4 , when the one or more photoreactive monomers comprise the methylene functional group claim 4 , the one or more photoreactive monomers comprise polyethylene glycol norbornene claim 4 , polyethylene glycol diacrylate claim 4 , derivatives thereof claim 4 , or combinations thereof.6. The composition of claim 4 , wherein claim 4 , when the one or more photoreactive monomers comprise the acid functional group claim 4 , the one or more photoreactive monomers comprise polylactic acid claim 4 , derivatives ...

HIGHLY-SWELLABLE POLYMERIC FILMS AND COMPOSITIONS COMPRISING THE SAME

Highly-swellable polymeric films are provided. Aspects also include ingestible compositions that include the highly-swellable polymeric film and an ingestible component. Aspects further include methods of making and using the compositions. 139.-. (canceled)40. A device comprising:a framework;a control device coupled to the framework;a partial power source coupled to the control device and configured to provide power to the control device when activated, the partial power source comprising an anode material and a cathode material; anda highly-swellable polymeric film that rapidly swells without disintegrating upon contact with an aqueous medium external to the device, and covers at least one of the anode material and the cathode material;{'claim-text': ['in a first mode of operation, increase shelf-life stability of the device by inhibiting reaction of at least one of the anode material and the cathode material with ambient moisture while the device is in storage; and', {'claim-text': ['swell upon contact with the aqueous medium; and', 'upon swelling, provide conduction between the aqueous medium and at least one of the anode material and the cathode material that the highly-swellable polymeric film is covering.'], '#text': 'in a second mode of operation:'}], '#text': 'wherein the highly-swellable polymeric film is pre-fabricated to:'}41. The device according to claim 40 , wherein the highly-swellable polymeric film rapidly swells to ten times or greater in volume upon contact with the aqueous medium.42. The device according to claim 41 , wherein the highly-swellable polymeric film swells to ten times or greater in volume within one minute or less upon contact with the aqueous medium.43. The device according to claim 40 , wherein the highly-swellable polymeric film is configured to absorb ten grams or more of water per gram of film upon contact the aqueous medium.44. The device according to claim 40 , wherein the highly-swellable polymeric film comprises an ionic ...

A SUPERABSORBENT POLYMER AND A PREPARATION METHOD THEREOF

The present invention relates to a superabsorbent polymer that has more improved gel strength and is improved in both water retention capacity (centrifuge retention capacity, CRC) and absorption ability under pressure (AUP) because of an optimized cross-linked structure of a base resin powder inside a cross-linked surface layer, and a preparation method thereof. The superabsorbent polymer includes a base resin powder including a 1st cross-linked polymer of a water-soluble ethylenic unsaturated monomer having acid groups of which at least a part is neutralized, and a cross-linked surface layer that includes a 2nd cross-linked polymer further cross-linked from the 1st cross-linked polymer and is formed on the base resin powder, wherein an inorganic particle is chemically bonded to the 1st cross-linked polymer by the medium of a cross-linking bond, an oxygen-containing bond (—O—), or a nitrogen-containing bond (—NR—, where R is hydrogen or a C1-C3 alkyl or an amide bond). 1. A superabsorbent polymer , including: a base resin powder including a 1st cross-linked polymer of a water-soluble ethylenic unsaturated monomer having acid groups of which at least a part is neutralized; and a cross-linked surface layer that includes a 2nd cross-linked polymer further cross-linked from the 1st cross-linked polymer and formed on the base resin powder , wherein an inorganic particle is chemically bonded to the 1st cross-linked polymer by the medium of a cross-linking bond , an oxygen-containing bond (—O—) , or a nitrogen-containing bond (—NR— , where R is hydrogen or a C-Calkyl or amide bond).2. The superabsorbent polymer according to claim 1 , wherein the water-soluble ethylenic unsaturated monomer includes one or more monomers selected from the group consisting of: an anionic monomer of acrylic acid claim 1 , methacrylic acid claim 1 , maleic anhydride claim 1 , fumaric acid claim 1 , crotonic acid claim 1 , itaconic acid claim 1 , 2-acryloyl ethane sulfonic acid claim 1 , 2- ...

Absorbent cores having material free areas

An absorbent core ( 28 ), for use in an absorbent article, comprising a core wrap ( 16, 16 ′) enclosing an absorbent material ( 60 ) comprising superabsorbent polymer particles. The core wrap comprises a top side ( 16 ) and a bottom side ( 16 ′), and the absorbent core comprises one or more area(s) ( 26 ) substantially free of absorbent material through which the top side of the core wrap is attached to the bottom side of the core wrap, so that when the absorbent material swells the core wrap forms one or more channel(s) ( 26 ′) along the area(s) ( 26 ) substantially free of absorbent material. The superabsorbent polymer particles have a time to reach an uptake of 20 g/g (T20) of less than 240 s as measured according to the K(t) test method.

CARBOXYL GROUP-CONTAINING POLYMER COMPOSITION AND METHOD FOR PRODUCING SAME

Provided is a carboxyl group-containing polymer composition which has little odor and excellent dispersibility in water, and which additionally has excellent transparency and excellent thickening properties for alcohol gels. A carboxyl group-containing polymer composition according to the present invention contains: a carboxyl group-containing polymer (A) which is a copolymer of a monomer that contains an α,β-unsaturated carboxylic acid (a-1) and a compound (a-2) that has at least two ethylenically unsaturated groups in each molecule; and a nonionic surfactant (B). An alcohol gel A prepared by the process described below has a viscosity of 5,000 mPa·s or more at 25° C.; and the alcohol gel A has a light transmittance of 95% or more at a wavelength of 425 nm. (Preparation of alcohol gel A) First, 0.75 part by mass of the carboxyl group-containing polymer composition, 51.70 parts by mass of an ion exchange water and 96.0 parts by mass of ethanol are uniformly mixed with each other. Subsequently, an ethanol solution of triethanolamine having a concentration of 50% by mass is added thereto until the pH reaches 7.0, and the resulting mixture is stirred until the mixture becomes uniform, thereby preparing an alcohol gel A. 1. A carboxyl group-containing polymer composition comprising:a carboxyl group-containing polymer (A) that is a copolymer of monomers containing an α,β-unsaturated carboxylic acid (a-1) and a compound (a-2) having at least two ethylenically unsaturated groups in its molecule; anda nonionic surfactant (B),wherein an alcohol gel A prepared by the following preparation method has a viscosity of 5,000 mPa·s or more at 25° C.,the alcohol gel A has a light transmittance of 95% or more at a wavelength of 425 nm, andthe preparation method of the alcohol gel A includes homogeneously mixing 0.75 parts by mass of the carboxyl group-containing polymer composition, 51.70 parts by mass of ion exchange water, and 96.0 parts by mass of ethanol with each other, and then ...

Preparation Method For Super Absorbent Polymer Sheet

A method of preparing a superabsorbent polymer sheet by polymerization of monomers in the presence of an encapsulated foaming agent and an inorganic foaming agent is provided. According to the method of preparing the superabsorbent polymer sheet of the present invention, a porous and flexible superabsorbent polymer sheet may be prepared. 1. A method of preparing a superabsorbent polymer sheet , comprising:preparing a monomer composition by mixing an acrylic acid-based monomer having acidic groups which are at least partially neutralized, a comonomer including poly(ethylene glycol) methyl ether (meth)acrylate, an internal crosslinking agent, an encapsulated foaming agent, an inorganic foaming agent having an average particle diameter of 1 μm to 100 μm, and a polymerization initiator;forming a water-containing gel polymer by performing thermal polymerization or photopolymerization of the monomer composition; andforming the superabsorbent polymer sheet by drying the water-containing gel polymer,wherein the encapsulated foaming agent and the inorganic foaming agent are included at a weight ratio of 3:1 to 1:1.2. The method of claim 1 , wherein the poly(ethylene glycol) methyl ether (meth)acrylate is included in an amount of 5 parts by weight to 40 parts by weight with respect to 100 parts by weight of the acrylic acid-based monomer.3. The method of claim 1 , wherein the encapsulated foaming agent has an average particle diameter of 2 μm to 50 μm.4. The method of claim 1 , wherein the encapsulated foaming agent has an expansion ratio of 3 times to 15 times in air.5. The method of claim 1 , wherein the encapsulated foaming agent has a structure including a core which contains a hydrocarbon and a shell which surrounds the core and is formed using a thermoplastic resin.6. The method of claim 5 , wherein the hydrocarbon is one or more selected from the group consisting of n-propane claim 5 , n-butane claim 5 , iso-butane claim 5 , cyclobutane claim 5 , n-pentane claim 5 , ...

A Method For Preparing Superabsorbent Polymer, And Superabsorbent Polymer

The present invention relates to a method for preparing superabsorbent polymer that introduces a plate type and rod-shaped clay additive in the superabsorbent polymer, and thus exhibits basic properties of a superabsorbent polymer equivalent to or much better than the existing superabsorbent polymer through multi-crosslinking, and particularly, can improve absorbency under pressure (AUP), and a superabsorbent polymer obtained thereby. 1. A method for preparing a superabsorbent polymer comprising the steps of:mixing water-soluble ethylenically unsaturated monomers having acid groups of which at least a part are neutralized, an internal crosslinking agent, a polymerization initiator, and additives to prepare a monomer composition;polymerizing the monomer composition to form a hydrogel polymer comprising a multi-crosslinked polymer; anddrying, grinding, and sieving the hydrogel polymer to form a base polymer powder,wherein the additives comprise a plate type and rod-shaped clay that is modified by an amine-based organic compound and has an amine group introduced on the surface thereof.2. The method for preparing a superabsorbent polymer according to claim 1 , wherein the content of the amine-based organic compound is 5 to 50 parts by weight claim 1 , based on 100 parts by weight of the clay before being modified.4. The method for preparing a superabsorbent polymer according to claim 1 , wherein the plate type and rod-shaped clay includes one or more nanoparticles selected from the group consisting of montmorillonite claim 1 , saponite claim 1 , nontronite claim 1 , laponite claim 1 , beidelite claim 1 , hectorite claim 1 , vermiculite claim 1 , magadiite claim 1 , kaolin claim 1 , serpentine claim 1 , and mica.5. The method for preparing superabsorbent polymer according to claim 1 , wherein the plate type and rod-shaped clay include plate type and rod-shaped clay having an average size of 0.025 to 10 p.m.6. The method for preparing a superabsorbent polymer according to ...

Superabsorbent polymer production using certain carriers

A process is described for production of superabsorbents, comprising conveying steps for transporting the particulate material obtained, with use of a conveying machine from the group of the mechanical continuous conveyors with traction means in at least one of the conveying steps. Conveying machines used with preference are tubular drag conveyors and/or bucket conveyors.

METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER-ABSORBENT RESIN

A method is disclosed for inexpensively and stably producing, with high productivity, water absorbent resin having excellent damage resistance. A method for producing a polyacrylic acid (salt)-based water absorbent resin, the method comprising a surface-crosslinking step, the surface-crosslinking step including a reaction step, the reaction step involving using a reactor having (i) an inner wall surface having a temperature within a range of 100° C. to 250° C. and (ii) an inside atmosphere having a dew point within a range of 60° C. to 100° C., the reaction step including heat-treating a water absorbent resin mixture so as to produce water absorbent resin powder having a temperature within a range of 90° C. to 130° C. 1. A method for producing a polyacrylic acid (salt)-based water absorbent resin ,the method comprising a surface-crosslinking step,the surface-crosslinking step including a reaction step,the reaction step involving using a reactor having (i) an inner wall surface having a temperature within a range of 100° C. to 250° C. and (ii) an inside atmosphere having a dew point within a range of 60° C. to 100° C.,the reaction step including heat-treating a water absorbent resin mixture to control a powder temperature so that the powder temperature is 90° C. to 130° C.2. The method according to claim 1 ,whereinthe inside atmosphere has a temperature within a range of 100° C. to 150° C.3. The method according to claim 1 ,whereina powder relative humidity during the reaction step is from 15% to 100%.4. The method according to claim 1 ,whereinthe heat treatment during the reaction step is carried out for 5 minutes to 60 minutes.5. The method according to claim 1 ,whereinthe surface-crosslinking step involves using, as a surface-crosslinking agent, at least one compound selected from the group consisting of an epoxy compound, a haloepoxy compound, and an oxetane compound.6. The method according to claim 5 ,wherein:the surface-crosslinking agent is added in a form of ...

Method for producing water-absorbent resin particle

Provided is a method for producing water-absorbent resin particles suitable for use in absorbent article and the like, the water-absorbent resin particles having better water-absorbent performance, a suitable particle size, and a narrow particle-size distribution. A method for producing water-absorbent resin particles by reversed-phase suspension polymerization of a water-soluble ethylenic unsaturated monomer in a carrier fluid, wherein the method for producing water-absorbent resin particles comprises conducting the reversed-phase suspension polymerization reaction in the presence of an organic acid monoglyceride.

REDOX STIMULATED VARIABLE-MODULUS MATERIAL

A material having a first non-zero elastic modulus capable of reversibly changing the first non-zero elastic modulus to a second non-zero elastic modulus in response to a redox reaction occurring in the material. A method of producing a material that is reversibly cyclable between a first non-zero elastic modulus and a second non-zero elastic modulus, comprising: preparing a polymer comprising both crosslinks that do not depend on metal binding and functional groups capable of having oxidation-state specific binding constants to a metal ion; and doping the polymer with a solution containing the metal ion. 1. A material having a first non-zero elastic modulus capable of reversibly changing the first non-zero elastic modulus to a second non-zero elastic modulus in response to a redox reaction occurring in the material.2. The material of wherein the redox reaction is caused by an electric potential applied across the material or by exposing the material to an oxidant or reductant.3. The material of wherein the first non-zero elastic modulus or second non-zero elastic modulus is maintained by the material after abatement of the redox reaction.4. The material of wherein the material claim 1 , in-whole or in-part claim 1 , may reversibly change from substantially the first non-zero elastic modulus to substantially the second non-zero elastic modulus and vice versa upon successive redox reactions occurring in the material claim 1 , in-whole or in-part.5. The material of wherein the material has a minimum elastic modulus and a maximum elastic modulus claim 1 , wherein each of the first non-zero elastic modulus and the second non-zero elastic modulus may consist of a value at the minimum elastic modulus claim 1 , the maximum elastic modulus or a value therebetween wherein the first non-zero elastic modulus is greater than the second non-zero elastic modulus or the first non-zero elastic modulus is less than the second non-zero elastic modulus.6. The material of wherein the ...

Nanostructured polyelectrolytes for ion-selective membranes

Nanostructured polyelectrolyte bilayers deposited by Layer-by-Layer deposition on nanoporous membranes can be selectively crosslinked to modify the polyelectrolyte charge density and control ionic selectivity independent of ionic conductivity. For example, the polyelectrolyte bilayer can comprise a cationic polymer layer, such as poly(ethyleneimine), and an anionic polymer layer, such as poly(acrylic acid). Increasing the number of bilayers increases the cation selectivity when the poly(ethyleneimine) layer is crosslinked with glutaraldehyde. Crosslinking the membranes also increases the chemical and mechanical strength of the polyelectrolyte films. This controllable and inexpensive method can be used to create ion-selective and mechanically robust membranes on porous supports for a wide range of applications. 1. A method to fabricate an ion-selective membrane , comprising the steps of:providing a nanoporous membrane; andlayer-by-layer depositing at least one polyelectrolyte bilayer on at least one side of the nanoporous membrane, wherein the polyelectrolyte bilayer comprises a cationic polymer layer and an anionic polymer layer.3. The method of claim 1 , further comprising crosslinking or charge-neutralizing the cationic polymer claim 1 , thereby decreasing a cationic fixed charge in the polyelectrolyte bilayer.4. The method of claim 1 , further comprising crosslinking or charge-neutralizing the anionic polymer claim 1 , thereby decreasing an anionic fixed charge in the polyelectrolyte bilayer.5. The method of claim 1 , further comprising crosslinking the cationic polymer with the anionic polymer claim 1 , thereby decreasing both a cationic fixed charge and an anionic fixed charge in the polyelectrolyte bilayer.6. The method of claim 1 , wherein the cationic polymer comprises an amine group.7. The method of claim 6 , wherein the amine group comprises a primary or quaternary amine group.8. The method of claim 6 , further comprising crosslinking the amine groups of ...

Superabsorbent Polymer And Preparation Method For The Same

A method of preparing a superabsorbent polymer includes preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked in the presence of a sodium polycarboxylate surfactant; and heating the base resin in the presence of a surface crosslinking agent to carry out surface modification of the base resin, wherein the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent weight of 100 g/eq or more to less than 130 g/eq, and a second epoxy crosslinking agent having an epoxy equivalent weight of 130 g/eq or more. The superabsorbent polymer provides improved rewetting property and liquid permeability. 1. A method of preparing a superabsorbent polymer , comprising:preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked in the presence of a sodium polycarboxylate surfactant; andheating the base resin in the presence of a surface crosslinking agent to carry out surface modification of the base resin,wherein the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent weight of 100 g/eq or more to less than 130 g/eq, and a second epoxy crosslinking agent having an epoxy equivalent weight of 130 g/eq or more.2. The method of claim 1 , wherein the sodium polycarboxylate surfactant is included in an amount of 0.01 part by weight to 1 part by weight with respect to 100 parts by weight of the acrylic acid-based monomer.3. The method of claim 1 , wherein the sodium polycarboxylate surfactant has a density of 1.07 g/ml to 1.13 g/ml claim 1 , and a weight average molecular weight of 500 g/mol to 1 claim 1 ,000 claim 1 ,000 g/mol.4. The method of claim 1 , wherein the second epoxy crosslinking agent has an epoxy equivalent weight of 150 g/eq to 400 g/eq.5. The method of claim 1 ...

GELS AND HYDROGELS AND SEED

Gels and gel-containing materials, including hydrogels, are described. A gel can be formed by blending polyacrylic acid (PAA) and a polyglycol, such as polytetramethylene ether glycol (PTMEG) at room temperature and, in some cases, without using a catalyst. The blend material can be used to form soft or hard materials, films and particles. The blend material can be combined with vinyl monomers and polymerize to form a hydrogel. The hydrogel can have a high mechanical strength and high water absorbency. The materials may coat a plant seed. 1. A coated seed comprising:a plant seed; and a first polymeric material having polyacrylic acid;', 'a second polymeric material comprising polytetramethylene ether glycol; and', 'one or more species having a vinyl functionality., 'a coating of a hydrogel comprising2. The coated seed of claim 1 , wherein at least one of the first polymeric material and the second polymeric material is substantially a homopolymer.3. The coated seed of claim 1 , wherein at least one of said one or more species having a vinyl functionality is selected from the group consisting of: acrylamide claim 1 , acrylic acid claim 1 , methylacrylic acid claim 1 , vinyl alcohol claim 1 , vinyl acetate claim 1 , butyl acrylate claim 1 , vinyl acrylate claim 1 , vinylbenzoic acid claim 1 , vinylbenzyl alcohol claim 1 , vinylboronic acid dibutyl ester claim 1 , vinylformamide claim 1 , vinyl methacrylate claim 1 , vinylpyridine claim 1 , 1-vinyl-2-pyrrolidone claim 1 , vinylsulfonic acid claim 1 , and vinyltrimethoxysilane.4. The coated seed of claim 1 , wherein the hydrogel further comprises a cross-linker selected from the group consisting of: di(ethyleneglycol) divinyl ether claim 1 , di(ethylglycol) diacrylate claim 1 , and N claim 1 ,N′-methylene bis(acrylamide).5. The coated seed of claim 1 , wherein at least one of said one or more species having a vinyl functionality is covalently bonded to the first polymeric material.6. The coated seed of claim 1 , wherein ...

METHOD OF PREPARING SUPER ABSORBENT POLYMER

The present invention relates to a method of preparing a super absorbent polymer (SAP). The preparation method for SAP according to the present invention includes: preparing a first polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition comprising a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; preparing a second polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition comprising a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the first polymer; milling the dried first polymer; and mixing the milled first polymer with the second polymer in the free swelling state using the crosslinking solution to cause a crosslinking reaction of the first and second polymers. According to the present invention, it is possible to obtain a super absorbent polymer (SAP) having high centrifuge retention capacity and high absorption under pressure. 1. A method of preparing a super absorbent polymer , comprising:preparing a first polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition comprising a water-soluble ethylene-based unsaturated monomer and a polymerization initiator;preparing a second polymer by carrying out a thermal polymerization or photo polymerization of a monomer composition comprising a water-soluble ethylene-based unsaturated monomer and a polymerization initiator;drying the first polymer;milling the dried first polymer; andmixing the milled first polymer with the second polymer in the free swelling state using the crosslinking solution to cause a crosslinking reaction of the first and second polymers.2. The method as claimed in claim 1 , wherein the crosslinking solution comprises water and a crosslinking agent.3. The method as claimed in claim 2 , wherein the crosslinking agent comprises at least one selected from the group consisting of a polyhydric alcohol compound; ...

Mineral wool insulation

Mineral wool insulation products are provided. The mineral wool insulation includes a plurality of mineral wool fibers and a wax emulsion applied to the mineral wool fibers. The wax emulsion imparts excellent water resistance and thermal performance properties to the mineral wool insulation.

TEMPERATURE-RESPONSIVE GEL HAVING LCST WITH NO VOLUME PHASE TRANSITION, AND PRODUCTION METHOD THEREFOR

A temperature-responsive hydrogel which contains a carboxyl group-bearing polymer and a divalent-metal salt of an organic acid is provided. The carboxyl group-bearing polymer may be a homopolymer of a carboxyl group-bearing monomer or a copolymer of a plurality of monomers including the monomer. A method for producing the temperature-responsive hydrogel involves immersing a carboxyl group-bearing polymer in an aqueous solution of a divalent-metal salt of an organic acid. The concentration of the divalent-metal salt of an organic acid in the aqueous solution may be 50 mM to the saturation concentration. It is possible to provide a temperature-responsive gel having an LCST with no volume phase transition and a method for producing the temperature-responsive gel. 1. A temperature-responsive hydrogel comprising a carboxyl group-bearing polymer and a divalent metal salt of an organic acid.2. The temperature-responsive hydrogel according to claim 1 , wherein the carboxyl group-bearing polymer is a homopolymer of a carboxyl group-bearing monomer or a copolymer of a plurality of monomer species that includes the carboxyl group-bearing monomer.3. The temperature-responsive hydrogel according to claim 2 , wherein the carboxyl group-bearing monomer is at least one selected from the group consisting of acrylic acid claim 2 , methacrylic acid claim 2 , itaconic acid claim 2 , maleic anhydride claim 2 , maleic acid claim 2 , fumaric acid claim 2 , and crotonic acid.4. The temperature-responsive hydrogel according to claim 3 , wherein the homopolymer of a carboxyl group-bearing monomer is a polyacrylic acid or a polymethacrylic acid.5. The temperature-responsive hydrogel according to claim 2 , wherein the copolymer is a copolymer of a carboxyl group-bearing monomer and a monomer other than a carboxyl group-bearing monomer claim 2 , and the monomer constituting the copolymer other than a carboxyl group-bearing monomer is at least one selected from the group consisting of acrylate ...

Super absorbent polymer

The present invention relates to a super absorbent polymer. According to the present invention, provided is a super absorbent polymer which includes (meth)acrylated polyalkylene glycol on an internally crosslinked polymer inside a surface modified layer, thereby exhibiting more improved absorbency and retention capacity.

ABSORBENT CORE HAVING WATER-ABSORBING POLYMER PARTICLES

A method for making water-absorbing polymer particles is provided and includes providing crosslinkers, polymerizable monomers and inorganic solid particles. The average closest distance between two neighboring crosslinkers (R) in a water-absorbing polymer particle for a specific X-load of the water-absorbing polymer particle is calculated via the formula below: 2. The absorbent core according to claim 1 , wherein the average closest distance between two neighboring crosslinkers (RXL) at 20 g/g X-load of the water-absorbing polymer particle is from 3 nm to 100 nm.3. The absorbent core according to claim 1 , wherein the average closest distance between two crosslinkers (R) at 20 g/g X-load of the water-absorbing polymer particle is from 3 nm to 50 nm.4. The absorbent core according to claim 1 , wherein a concentration of crosslinkers (C) in the water-absorbing polymer particle is from 0.01 mol % to 0.5 mol %.5. The absorbent core according to claim 1 , wherein an average range of size of the inorganic solid particles is from 3 to 100 nm.6. The absorbent core according to claim 1 , wherein the crosslinkers comprise acrylate or acrylamide groups.7. The absorbent core according to claim 1 , wherein the polymerizable monomers are selected from the group consisting of ethylenically unsaturated carboxylic acids or their salts claim 1 , ethylenically unsaturated phosphonic acids or their salts claim 1 , ethylenically unsaturated sulfonic acids or their salts claim 1 , or mixtures thereof.8. The absorbent core according to claim 1 , wherein the water-absorbing polymer particles comprise crosslinked polymers of polyacrylic acids or their salts or polyacrylates or derivatives thereof.9. The absorbent core according to claim 1 , wherein the inorganic solid particles in the water-absorbing polymer particles are clay platelets.10. The absorbent core according to claim 9 , wherein the clay platelets are laponite.11. The absorbent core according to claim 1 , wherein a concentration ...

PARTICULATE WATER ABSORBING AGENT AND WATER ABSORBENT ARTICLE

A water absorbent resin (water absorbing agent) and method for producing it are provided which improve, in a water absorbent article (in particular, a diaper) including a water absorbent resin as a water absorbing agent, the absolute absorption amount (g), liquid absorbing times (in particular, liquid absorbing times at the second instance and later), re-wet (g), and diffusion distance (%) of the water absorbent article. 1. A particulate water absorbing agent , comprising:a polyacrylic acid (salt)-based water absorbent resin as a main component,the polyacrylic acid (salt)-based water absorbent resin being a surface-crosslinked water absorbent resin containing an internal crosslinking agent in an amount of 0.04 mol % or more to 0.07 mol % or less relative to a monomer,the particulate water absorbing agent having a swelling rate (CRC) of 32 g/g to 50 g/g relative to 0.9-mass % saline,the particulate water absorbing agent including, at a proportion of 80 mass % or more, a particle having a size of 600 μm to 150 μm as defined through a standard-sieve classification,the particulate water absorbing agent having a second-instance pure-water 50-fold swelling time (SST (in seconds)) of 70 seconds or less,a difference (DST=SST−FST) between a first-instance pure-water 50-fold swelling time (FST (in seconds)) and the second-instance pure-water 50-fold swelling time (SST (in seconds)) being+10 seconds or less,the particulate water absorbing agent including, at 3 mass % or less, a particle that passes through a 150 μm mesh as defined through a standard-sieve classification.2. The particulate water absorbing agent according to claim 1 , further comprising:a water-insoluble inorganic fine particle as a liquid permeability improving agent.3. The particulate water absorbing agent according to claim 2 ,wherein:the water-insoluble inorganic fine particle is contained in an amount of 0.05 part by mass to 5.0 parts by mass relative to 100 parts by mass of the particulate water absorbing ...

PARTICULATE WATER-ABSORBING AGENT

The present invention provides a particulate water-absorbing agent which has an excellent fluid retention capacity under pressure and an excellent liquid permeability. Each of the following values of the particulate water-absorbing agent of the present invention falls within a certain range: a ratio represented by “centrifuge retention capacity/Ln (water-soluble component amount)”; a molecular weight distribution of the water-soluble component; a weight average molecular weight after a hydrolysis treatment; and a branching density after the hydrolysis treatment. 1. A particulate water-absorbing agent comprising a polyacrylic acid (salt)-based water-absorbing resin as a main component , said particulate water-absorbing agent satisfying (a) through (d) below: {'br': None, 'EXI=centrifuge retention capacity/Ln(water-soluble component amount)\u2003\u2003(1),'}, '(a) EXI represented by the following Formula (1) is not less than 11.5 {'br': None, 'Molecular weight distribution=weight average molecular weight/number average molecular weight\u2003\u2003(2),'}, '(b) a molecular weight distribution, represented by the following Formula (2), of a water-soluble component is 1.0 to 4.8(c) a weight average molecular weight after a hydrolysis treatment is 450,000 Da to 1,800,000 Da, and(d) a branching density after the hydrolysis treatment is not more than 0.100,said hydrolysis treatment being a treatment carried out by allowing said particulate water-absorbing agent to swell in a 0.9 weight % aqueous sodium chloride solution, removing the water-soluble component so as to obtain a gel, and allowing 600 mg of the gel to stand still in 10 mL of a 0.1 N aqueous sodium hydroxide solution at 80° C. for 3 weeks.2. The particulate water-absorbing agent according to claim 1 , whereinsaid weight average molecular weight of the water-soluble component is 200,000 Da to 1,000,000 Da.3. The particulate water-absorbing agent according to claim 1 , whereina fluid retention capacity under ...

SURFACE-MODIFIED SUPER ABSORBENT RESIN AND METHOD FOR PREPARING SAME

Disclosed herein is a superabsorbent polymer with a surface modified with both a water-soluble polyvalent cationic salt and a polycarbonic acid-based copolymer, wherein an improvement is brought about in processability without significant degradation of other properties and a method is provided for preparing the surface-modified superabsorbent polymer. 1. A surface-modified superabsorbent polymer , having a surface modified with a water-soluble polyvalent cationic salt and a polycarbonic acid-based copolymer.2. The surface-modified superabsorbent polymer of claim 1 , wherein the water-soluble polyvalent cationic salt is contained in an amount of 0.001 to 5.0 parts by weight claim 1 , based on 100 parts by weight of a superabsorbent resin.3. The surface-modified superabsorbent polymer of claim 1 , wherein the water-soluble polyvalent cationic salt comprise a cationic ion selected from the group consisting of Al claim 1 , Zr claim 1 , Sc claim 1 , Ti claim 1 , V claim 1 , Cr claim 1 , Mn claim 1 , Fe claim 1 , Ni claim 1 , Cu claim 1 , Zn claim 1 , Ag claim 1 , Pt claim 1 , Au claim 1 , and a combination thereof claim 1 , and an anion selected from the group consisting of sulfate (SO) claim 1 , sulfite (SO) claim 1 , nitrate (NO) claim 1 , metaphosphate (PO) claim 1 , phosphate (PO) claim 1 , and a combination thereof.4. The surface-modified superabsorbent polymer of claim 3 , wherein the water-soluble polyvalent cationic salt is aluminum sulfate (Al(SO)) or zirconium sulfate (Zr(SO)).5. The surface-modified superabsorbent polymer of claim 1 , wherein the polycarbonic acid-based copolymer is contained in an amount of 0.001 to 5.0 parts by weight claim 1 , based on 100 parts by weight of the superabsorbent polymer.6. The surface-modified superabsorbent polymer of claim 1 , wherein the polycarbonic acid-based copolymer contains an alkoxypolyalkylene glycol mono(meth)acrylic acid ester monomer and a (meth)acrylic acid monomer.8. The surface-modified superabsorbent ...

HEAT-TREATMENT OF WATER-ABSORBING POLYMERIC PARTICLES IN A FLUIDIZED BED

The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature in the range of from 100 to 250° C. in a fluidized bed dryer under specifically adapted apparatus and method conditions, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention. 1. A method for heat-treating water-absorbing polymeric particles at a temperature Tin the range of from 100 to 250° C. in a fluidized bed dryer by contacting said water-absorbing polymeric particles with at least one hot gas stream having a temperature Tin the range of from 100 to 320° C. inside the fluidization chamber of a drying compartment in a fluidized bed dryer , said drying compartment comprising at least one fluidization chamber , opening downwardly in at least one lower plenum chamber through at least one gas distribution bottom plate having openings formed there through for upward gas flow from said lower plenum chamber into said fluidization chamber , wherein the superficial gas velocity of said hot gas stream in the fluidized bed is in the range of from 0.1 to 0.57 m/s.2. A method according to claim 1 , wherein said water-absorbing polymeric particles are obtained by polymerising a monomer mixture comprising acrylic acid present at least partly in form of a salt claim 1 , at least one type of cross-linker and at least one type of initiator.3. A method according to claim 1 , wherein said water-absorbing polymeric particles comprise an residual amount of water being less than 12 wt. % claim 1 , based on the composition claim 1 , as determined by the EDANA standard test method WSP 203.3(10).4. A method according to claim 1 , wherein said water-absorbing polymeric particles in the fluidized bed are moved along an essentially horizontal longitudinal axis of the fluidization chamber during heat-treating and wherein ...

Manufacturing Method Of Super Absorbent Polymer And Super Absorbent Polymer

The present invention relates to a super absorbent polymer and a manufacturing method thereof. More particularly, the present invention relates to a manufacturing a fine powder reassembly in which excellent physical properties are maintained. 1. A super absorbent polymer in which a fine powder reassembly , which is obtained by mixing fine powder with sodium hydroxide and performing reassembly , is subjected to surface cross-linking , wherein the fine powder has a particle diameter of less than 150 μm in the super absorbent polymer obtained by polymerizing a water-soluble ethylenically unsaturated monomer in which an acidic group is included and at least one portion of the acidic group is neutralized ,wherein a centrifugal retention capacity (CRC) measured according to EDANA method WSP 241.3 is 33.0 to 39.0 g/g;a 0.7 psi absorption under pressure (AUP) measured according to EDANA method WSP 241.3 is 20.0 to 25.0 g/g; andan absorption speed by a vortex method is 100 seconds or less.2. The super absorbent polymer of claim 1 , wherein:the sodium hydroxide is mixed in a content of 0.1 to 20 parts by weight with respect to 100 parts by weight of the fine powder. This application is a divisional of U.S. application Ser. No. 15/765,092, filed on Mar. 30, 2018, which is a national phase entry under 35 U.S.C. § 371 of International Application No. PCT/KR2016/010375, filed on Sep. 13, 2016, which claims the benefit of Korean Patent Application No. 10-2016-0029840, filed in the Korean Intellectual Property Office on Mar. 11, 2016, and Korean Patent Application No. 10-2016-0101900, filed in the Korean Intellectual Property Office on Aug. 10, 2016, the entire contents of which are incorporated herein by reference.The present invention relates to a super absorbent polymer and a manufacturing method thereof. More particularly, the present invention relates to a super absorbent polymer capable of manufacturing a fine powder reassembly exhibiting excellent absorption characteristic ...

Super Absorbent Polymer

The present invention relates to a superabsorbent polymer exhibiting excellent heat stability. 2. The superabsorbent polymer according to claim 1 , wherein the Pis 60 to 85 g/g.3. The superabsorbent polymer according to claim 1 , wherein the Pis 55 to 85 g/g.4. The superabsorbent polymer according to claim 1 , wherein Rin the Chemical Formula 1 claim 1 , is methane-1 claim 1 ,1-diyl claim 1 , propane-1 claim 1 ,3-diyl claim 1 , propane-1 claim 1 ,2-diyl claim 1 , propane-1 claim 1 ,1-diyl claim 1 , n-butane-1 claim 1 ,4-diyl claim 1 , n-butane-1 claim 1 ,3-diyl claim 1 , n-butane-1 claim 1 ,2-diyl claim 1 , n-butane-1 claim 1 ,1-diyl claim 1 , 2-methylpropane-1 claim 1 ,3-diyl claim 1 , 2-methylpropane-1 claim 1 ,2-diyl claim 1 , 2-methylpropane-1 claim 1 ,1-diyl claim 1 , 2-methylbutane-1 claim 1 ,4-diyl claim 1 , 2-methylbutane-2 claim 1 ,4-diyl claim 1 , 2-methylbutane-3 claim 1 ,4-diyl claim 1 , 2-metylbutane-4 claim 1 ,4-diyl claim 1 , 2-methylbutane-1 claim 1 ,3-diyl claim 1 , 2-methylbutane-1 claim 1 ,2-diyl claim 1 , 2-methylbutane-1 claim 1 ,1-diyl or 2-methylbutane-2 claim 1 ,3-diyl.5. The superabsorbent polymer according to claim 1 , wherein Rin the Chemical Formula 1 claim 1 , is propane-1 claim 1 ,3-diyl or propane-1 claim 1 ,2-diyl.6. The superabsorbent polymer according to claim 1 , wherein the base resin powder comprise crosslinked polymer formed by the crosslinking polymerization of water soluble ethylenically unsaturated monomers having acid groups of which at least a part are neutralized claim 1 , in the presence of an internal crosslinking agent comprising a compound represented by the following Chemical Formula 1 in the content of 80 wt % or more claim 1 , based on the total weight of the internal crosslinking agent claim 1 , and inorganic material.7. The superabsorbent polymer according to claim 6 , wherein the inorganic material is montmorillonite claim 6 , saponite claim 6 , nontronite claim 6 , laponite claim 6 , beidelite claim 6 , ...

Super Absorbent Polymer And Method For Producing Same

A super absorbent polymer according to the present invention has an excellent discoloration resistance characteristic even under high temperature/high humidity conditions, while maintaining excellent absorption performance, and is preferably used for hygienic materials such as diapers, and thus can exhibit excellent performance. 1. A super absorbent polymer comprising:a base polymer powder comprising a first cross-linked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; anda surface cross-linked layer formed on the base polymer powder and comprising a second cross-linked polymer in which the first cross-linked polymer is further cross-linked via a surface crosslinking agent, a sulfonate derivative and a sulfinate derivative,wherein a vortex time measured according to the measurement method of Vortex is 25 to 50 seconds,wherein an extractable content measured according to EDANA method No. WSP 270.2 is 15% by weight or less,wherein in a CIE 1976 colorimetric system, an L value is 90 or more and a b value is 8 or less, andwherein in a CIE 1976 colorimetric system measured after the super absorbent polymer is left under a condition of a temperature of 90° C. and a relative humidity of 90% for 48 hours, an L value is 80 or more and a b value is 9 or less.2. A super absorbent polymer comprising:a base polymer powder comprising a first cross-linked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; anda surface cross-linked layer formed on the base polymer powder and including a second cross-linked polymer in which the first cross-linked polymer is further cross-linked via a surface crosslinking agent,wherein a vortex time measured according to the measurement method of Vortex is 25 to 50 seconds,wherein an extractable content measured according to EDANA method No. WSP 270.2 is 15% by weight or less,wherein in a CIE 1976 colorimetric system, an L ...

WATER-ABSORBENT RESIN AND ABSORBENT ARTICLE

The following are provided: a water-absorbent resin in which, in the formation of an absorbent material forming an absorbent article, dispersion is satisfactory even in a moisture absorption state, which prevents the occurrence of troubles at the time of manufacturing of the absorbent article and which allows efficient manufacturing; and an absorbent article using an absorbent material containing the water-absorbent resin. The water-absorbent resin according to the present invention is obtained by polymerizing a water-soluble ethylenically unsaturated monomer and performing post-crosslinking thereon with a post-crosslinking agent, and the water-absorbent resin satisfies the requirements below: 2. (canceled)3. An absorbent article that uses an absorbent material comprising the water-absorbent resin according to . The present invention relates to a water-absorbent resin and an absorbent article, and more particularly relates to a water-absorbent resin forming an absorbent material suitably used for hygienic materials such as sanitary articles and disposable diapers and to an absorbent article using its resin.In recent years, water-absorbent resins have been widely used in the fields of hygienic materials such as sanitary articles and disposable diapers.For water-absorbent resins as described above, crosslinked products of partially neutralized polymers of acrylic acid are preferred because they have many advantages, including the followings: they have excellent water-absorption performance; their raw materials such as acrylic acid has easy industrial availability, and therefore they can be produced with stable quality and low cost; and they show no shortcomings such as in which decomposition is likely to occur.In the fields of hygienic materials such as sanitary articles and disposable diapers, such a water-absorbent resin is used to form an absorbent material, and by the means that the absorbent material is held between a liquid permeable sheet (top sheet) through ...

METHOD OF MANUFACTURING WATER-ABSORBENT RESIN, WATER-ABSORBENT RESIN, WATER-ABSORBING AGENT AND ABSORBENT ARTICLE

With respect to water-absorbent resins, there are provided a method of manufacturing a water-absorbent resin having an appropriate BET specific surface and a water-absorption rate and a water-absorbing agent and an absorbent article that are formed by using the water-absorbent resin. In a first aspect of the present invention, when reverse phase suspension polymerization of two steps or more is performed on a water-soluble ethylenically unsaturated monomer in a hydrocarbon dispersion medium in the presence of at least an azo compound, a peroxide and an internal-crosslinking agent, the used amount of the internal-crosslinking agent at the time of the polymerization of a first step is adjusted to fall within a range of 0.015 to 0.150 mmol per mole of the water-soluble ethylenically unsaturated monomer used at the time of the polymerization of the first step and he polymerization is performed such that, the BET specific surface area of secondary particles formed by agglomeration of primary particles obtained is controlled. 1. A method of manufacturing a water-absorbent resin , wherein when reverse phase suspension polymerization of two steps or more is performed on a water-soluble ethylenically unsaturated monomer in a hydrocarbon dispersion medium in presence of at least an azo compound , a peroxide and an internal-crosslinking agent ,the polymerization at each step being performed in the presence of an azo compound and a peroxide,a used amount of the internal-crosslinking agent at the time of the polymerization of a first step for 1 mole of the water-soluble ethylenically unsaturated monomer used at the time of the polymerization of the first step is adjusted to fall within a range of 0.015 to 0.150 mmol and the polymerization is performed such that a BET specific surface area of secondary particles formed by agglomeration of primary particles obtained is controlled.2. The method of manufacturing a water-absorbent resin according to claim 1 , wherein a used amount ( ...

ABSORBENT POLYMERIC FOAM FOR SHOE INSOLES

The present invention relates to a polymeric foam, and a process for making the polymeric foam comprising the steps of a) providing a monomeric solution consisting of a polymerizable, ethylenically unsaturated monomer containing one or more acid groups, water and one or more crosslinkers having more than one polymerizable group per molecule; b) introducing a blowing agent to the monomer solution; c) treating the monomer solution with an ultrasonic treatment; d) introducing one or more initiation agents to the monomer solution; and e) polymerizing the monomer solution. 1. A process for making a polymeric foam comprising the steps ofa) providing a monomeric solution consisting of a polymerizable, ethylenically unsaturated monomer containing one or more acid groups, water and one or more crosslinkers having more than one polymerizable group per molecule;b) introducing a blowing agent to the monomer solution;c) treating the monomer solution with an ultrasonic treatment;d) introducing one or more initiation agents to the monomer solution; ande) polymerizing the monomer solution.2. The process of further comprising polymerizing the monomer solution into a polymeric foam sheet.3. The process of further comprising cutting or forming the polymeric foam sheet into a shoe sole insert shape.4. The process of further comprising comminuting the polymeric foam sheet into particles.5. The process of wherein the blowing agent is a carbonate or a bicarbonate based compound or carbon dioxide6. The process of wherein treating the monomer solution with an ultrasonic treatment comprises introducing energy by an ultrasonic probe or an ultrasonic transducer driven surface.7. The process of wherein the blowing agent is further applied prior to gelation of the monomer solution during polymerization.8. The process of wherein ultrasonic radiation is further applied prior to gelation of the monomer solution during polymerization.9. The process of wherein the ultrasonic treatment produces one or ...

METHOD FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES WITH IMPROVED PROPERTIES

The present invention relates to a process for producing water-absorbing polymer particles having an improved profile of properties, comprising thermal surface postcrosslinking in the presence of a salt of a polyvalent metal cation and a complexing anion and subsequent aftertreatment, the aftertreatment comprising coating with a salt of a polyvalent metal cation and a non-complexing anion, and remoisturization with further drying. 1. A process for producing water-absorbing polymer particles comprising polymerizing a monomer solution or suspension comprisinga) at least one ethylenically unsaturated monomer which bears an acid group and may be at least partly neutralized,b) at least one crosslinker,c) at least one initiator,d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer mentioned under a) ande) optionally one or more water-soluble polymer,drying, grinding, and classifying a resulting polymer gel, and thermally surface postcrosslinking the classified polymer particles withf) at least one covalent surface postcrosslinker, andg) at least one salt of a polyvalent metal cation and a complexing acid anionwhich comprises subsequently aftertreating the surface postcrosslinked polymer particles, the aftertreatment comprisingi) coating with at least one salt of a polyvalent metal cation and a non-complexing acid anion,ii) increasing the moisture content by 1 to 150% by weight, andiii) drying after the increase in the moisture content.2. The process according to claim 1 , wherein step ii) is conducted before step i).3. The process according to claim 1 , wherein the complexing acid anion is selected from the group of glycolate claim 1 , glycinate claim 1 , lactate claim 1 , alanate claim 1 , citrate claim 1 , tartrate claim 1 , tartronate claim 1 , and glycerate.4. The process according to claim 1 , wherein the classified polymer particles are coated with 0.02 to 0.8% by weight of the polyvalent metal cation.5. The process according ...

ABSORBENT ARTICLES AND METHODS OF MAKING

Described herein are absorbent articles and methods of making such articles. The articles are made by bonding a copolymer onto a substrate to form a core. The absorbent articles are particularly useful in personal care product, e.g., disposable hygiene products. 2. The absorbent article of claim 1 , wherein the polymeric porogen has a molecular weight of at least 200.3. The absorbent article of claim 1 , comprising 1 wt % of the polymeric porogen.4. The absorbent article of claim 1 , comprising the polymeric porogen is selected from polyethyleneglycol and polypropyleneglycol and copolymers thereof.5. The absorbent article of claim 1 , wherein the polymerizable solution further comprises a third monomer claim 1 , wherein the third monomer is selected from at least one of 2-hydroxyethylmethacrylate claim 1 , 2-hydroxypropyl(meth)acrylate claim 1 , 3-hydroxypropyl(meth)acrylate claim 1 , N claim 1 ,N-dimethylacrylamide claim 1 , and acrylamide.6. The absorbent article of claim 1 , wherein the second monomer is selected from at least one of methylenebisacrylamide and polyethyleneglycoldiacrylate.7. The absorbent article of claim 1 , further comprising a second layer claim 1 , wherein the second layer is a liquid pervious layer.8. The absorbent article of claim 7 , wherein the second layer is selected from polyester claim 7 , polyolefin claim 7 , rayon claim 7 , cotton claim 7 , and combinations thereof.9. The absorbent article of further comprising a third layer claim 7 , wherein the third layer is a liquid impervious layer and the core sandwiched between the second layer and the third layer.10. The absorbent article of claim 9 , wherein the third layer is selected from a polyolefin.11. The absorbent article of claim 1 , wherein the first substrate is selected from at least one of a thermoplastic and a fabric.12. The absorbent article of claim 1 , wherein the first substrate is selected from at least one of a polypropylene claim 1 , polyethylene claim 1 , polyamide ...

PERFORATED HYDROGEL CONFIGURATIONS AND METHODS OF PRODUCTION AND USE THEREOF

Improved hydrogel configurations for use with a TTField-generating system is disclosed. Also disclosed are kits containing the improved hydrogel configurations and methods of producing and using the improved hydrogel configurations. 1. A hydrogel , comprising:a polymerized conductive hydrogel for application to a patient's skin and for placement between the patient's skin and at least one transducer array that generates an alternating electric field having a frequency in a range of from about 50 kHz to about 500 kHz, wherein the polymerized conductive hydrogel comprises a top surface and a bottom surface, further wherein the polymerized conductive hydrogel comprises at least one perforation extending from the top surface to the bottom surface through the polymerized conductive hydrogel.2. The hydrogel of claim 1 , wherein at least one perforation is circular in shape.3. The hydrogel of claim 2 , wherein the at least one perforation has a diameter of about 3.175 millimeters.4. The hydrogel of claim 1 , wherein the at least one perforation is hexagonal in shape.5. A hydrogel claim 1 , comprising:a polymerized conductive hydrogel for application to a patient's skin and for placement between the patient's skin and at least one transducer array that generates an alternating electric field having a frequency in a range of from about 50 kHz to about 500 kHz, wherein the polymerized conductive hydrogel comprises a top surface and a bottom surface, further wherein the polymerized conductive hydrogel comprises at least one protrusion extending from the bottom surface of the polymerized conductive hydrogel.6. The hydrogel of claim 5 , wherein the hydrogel is sterile.7. The hydrogel of claim 5 , wherein the hydrogel a polyacrylic acid gel claim 5 , a povidone gel claim 5 , or a cellulose gel.8. The hydrogel of claim 5 , wherein the hydrogel comprises at least one of chitosan claim 5 , alginate claim 5 , agarose claim 5 , methylcellulose claim 5 , hyaluronan claim 5 , collagen ...

HYDROGEL-FORMING COMPOSITION AND HYDROGEL PRODUCED FROM THE SAME

TASK It is an object of the present invention to provide a hydrogel having excellent mechanical properties and capable of being produced simply by using and mixing an industrially easily obtainable polymer having high versatility and clay particles, and to provide a method of producing the hydrogel. 1a polyelectrolyte (A),clay particles (B), anda dispersant (C) for the clay particles,wherein a product formed from the hydrogel-forming composition in a form of a column having a diameter of 6 mm and a length of 2 cm is stretchable 2 times or more in a length direction.. A stretchable hydrogel which is produced from a hydrogel-forming composition comprising: The present invention relates to a hydrogel. More in detail, the present invention relates to a polymer/nano fine particle composite hydrogel-forming composition and a polymer/nano fine particle composite hydrogel produced from the composition and having excellent mechanical properties. In addition, the present invention relates to a polymer/nano fine particle composite hydrogel having excellent stretching properties.A polymer hydrogel contains water as a main component, so that it is highly safe and it can be inexpensively produced. The polymer hydrogel places a low burden on the environment, so that it is attracting attention as a material for a soft material and it is utilized for an aromatic, a jelly, a paper diaper, and the like.However, many types of polymer hydrogels have a heterogeneous structure in which the crosslinkage density has a distribution, and they are mechanically brittle.To compensate for such a drawback on the mechanical properties, a polymer/nano fine particle composite-type hydrogel has been attracting attention.As a polymer/nano fine particle composite hydrogel having excellent mechanical properties, there is disclosed a nano composite gel obtained by radically polymerizing an acrylamide-based monomer in the presence of delaminated clay particles in water (Patent Document 1 and Non-patent ...

PREPARATION METHOD AND APPLICATION OF POROUS HYDROGEL ADSORBENT BASED ON RADIX ASTRAGALI RESIDUE

The present disclosure provides a preparation method of a porous hydrogel adsorbent based on Radix Astragali residues, including the following steps: subjecting residues of Chinese herbal medicine Radix Astragali as a precursor to bleaching with NaClO, alkaline washing with KOH, and high power ultrasonic treatment, thereby obtaining a precursor solution of uniformly dispersed cellulose nanofibers (CNFs); adding the precursor solution of CNFs to a mixed solution of N,N′-methylene bisacrylamide (MBA), acrylic acid (AA) and ammonium persulfate (APS), shaking evenly, and initiating a polymerization reaction at a predetermined temperature to form a monolithic gel; and cleaning the monolithic gel, putting the cleaned monolithic gel into a dimethyl sulfoxide (DMSO) solution containing epichlorohydrin to allow reaction, and transferring the product of the reaction to an aqueous sodium hydroxide solution containing triethylene tetramine to allow reaction, thereby finally obtaining an amino-functionalized porous hydrogel adsorbent. 1. A preparation method of a porous hydrogel adsorbent based on Radix Astragali residues , comprising the following steps:{'sub': '2', 'subjecting residues of Chinese herbal medicine Radix Astragali as a precursor to bleaching with NaClO, alkaline washing with KOH, and high power ultrasonic treatment, obtaining a precursor solution of uniformly dispersed cellulose nanofibers (CNFs);'}adding the precursor solution of CNFs to a mixed solution of N,N′-methylene bisacrylamide (MBA), acrylic acid (AA) and ammonium persulfate (APS), shaking evenly, and initiating a polymerization reaction at a predetermined temperature to form a monolithic gel; andcleaning the monolithic gel, putting the cleaned monolithic gel into a dimethyl sulfoxide (DMSO) solution containing epichlorohydrin to allow reaction, and transferring the product of the reaction to an aqueous sodium hydroxide solution containing triethylene tetramine to allow reaction, thereby finally ...

RECYCLING OF SUPERABSORBENT FIBERS VIA UV IRRADIATION IN FLOW SYSTEM

Superabsorbent fibers (SAF) in a feed stream is converted with UV irradiation into soluble polymers in a flow system. The UV total energy used to convert SAF into soluble polymers is less than about 50 MJ/kg SAF. 1. A method for degrading superabsorbent fibers (SAF) to soluble polymers , wherein the soluble polymers comprise from 5 weight-% to 75 weight-% of polymerized acrylic acid monomer units based on the total weight of the soluble polymers , the method comprising:flowing a feed stream comprising the SAF into a UV irradiation zone, irradiating the feed stream with UV, and producing a product stream comprising the soluble polymers at the end of the irradiation zone; wherein the feed stream comprises the SAF at a concentration greater than about 1 wt %; wherein the feed stream has a residence time in the UV irradiation zone of less than about 120 s; and wherein the UV used to convert SAF to the soluble polymers requires a UV total energy of less than about 50 MJ/kg SAF.2. The method of claim 1 , wherein the residence time is less than about 60 s.3. The method of claim 1 , wherein the UV total energy is less than about 16 MJ/kg SAF.4. The method of claim 1 , wherein the feed stream comprises SAF and water.5. The method of claim 1 , wherein the feed stream comprises SAF and hydrogen peroxide.6. The method of claim 1 , wherein the SAF has a sodium level as amount of Na of more than 8 wt %.7. The method of claim 1 , wherein the SAF has a sodium level as amount of Na of between about 10 wt % and about 20 wt %.8. The method of claim 1 , wherein the feed stream has a viscosity; wherein the product stream has a viscosity; wherein the ratio of the viscosity of the product stream to the viscosity of the feed stream is the viscosity ratio; and wherein the negative decadic logarithm of the viscosity ratio is less than about 6.9. The method of claim 1 , wherein the feed stream has a viscosity; wherein the product stream has a viscosity; wherein the ratio of the viscosity of ...

Recycling of Superabsorbent Polymer With a Hybrid Oxidative Degradation and High Shear Mixing

New process for recycling of poly(acrylic acid)-based superabsorbent polymer (SAP) using a synergistic combination of high shear mixing device and oxidative degradation of SAP to produce poly(acrylic acid) (PAA) useful to recycle pre- and post-consumer SAP. 1. A process for degrading acrylic acid based superabsorbent polymer (SAP) to poly(acrylic acid) PAA comprising:a. Forming a solution, wherein the solution comprises an oxidizer soluble salt in water at a dissolution temperature and a dissolution concentration;b. Dispersing SAP into the solution, forming an SAP dispersion having a viscosity, using a mixer with power input NP/M greater than about 20 W/kg solution; andc. Reacting said oxidizer with said SAP at a reaction temperature and for a reaction time to produce a PAA solution having a viscosity.2. The process according to wherein said reaction time is from about 10 min to about 240 min.3. The process according to wherein said reaction time is from about 10 min to about 180 min.4. The process according to wherein said reaction time is from about 10 min to about 90 min.5. The process according to wherein said reaction temperature is from about 60° C. to about 120° C.6. The process according to wherein said reaction temperature is from about 70° C. to about 110° C.7. The process according to wherein said reaction temperature is from about 70° C. to about 90° C.8. The process according to claim 1 , wherein said viscosity of said PAA solution and said viscosity of said SAP dispersion form a viscosity ratio; and wherein the negative logarithm of said viscosity ratio is greater than about 3 and less than about 5.9. The process according to claim 1 , wherein said PAA has a molecular weight from about 1 to about 1 claim 1 ,000 kDa.10. The process according to claim 1 , wherein said PAA has a molecular weight from about 50 to about 500 kDa.11. The process according to claim 1 , wherein the SAP concentration is from about 1% to about 30%.12. The process according to ...

Coating powdered polymer with a water-soluble dye as an indicator for polymer hydration state

A method for determining hydration of a polymer includes mixing a water-soluble, powdered dye with a powdered polymer and introducing the mixed water-soluble, powdered dye and powdered polymer into a water-based fluid. Full hydration of the powdered polymer is determined when the mixed water-soluble, powdered dye, powdered polymer and water-based fluid comprises substantially no internal optical contrast.

Water-absorbing agent and method for producing same, and absorbent article produced using water-absorbing agent

Provided is a water-absorbing agent having an excellent ability to absorb and retain liquid and an excellent liquid suction power. The water-absorbing agent contains a polyacrylic acid (salt)-based water-absorbing resin as a main component and satisfies all of the following physical properties (a) to (e): (a) a weight average particle diameter (D50) is 300 μm or more and less than 400 μm; (b) a proportion of particles with a particle diameter of 600 μm or more and less than 850 μm is less than 10 weight %; (c) an average gap radius is 100 μm or more and less than 180 μm; (d) a CRC is 28 g/g or more and less than 34 g/g; and (e) an AAP is 24 g/g or more.

ANISOTROPIC AND AMPHIPHILIC PARTICLES AND METHODS FOR PRODUCING AND USING THE SAME

A method for producing an amphiphilic particle or an anisotropic particle includes combining seed particles with a monomer emulsion to obtain monomer-swollen seed particles, polymerizing the monomer-swollen seed particles to obtain polymerized monomer-swollen particles, and hydrolyzing the polymerized monomer-swollen particles. An amphiphilic particle is adapted to stabilize a first type of multiphasic mixture comprising a first aqueous phase having a first pH and a second type of multiphasic mixture comprising a second aqueous phase having a second pH. 1. An amphiphilic particle adapted to stabilize a first type of multiphasic mixture comprising a first aqueous phase having a first pH and a second type of multiphasic mixture comprising a second aqueous phase having a second pH.2. The amphiphilic particle of adapted to cause a phase inversion of the first type of multiphasic mixture into the second type of multiphasic mixture by adjusting the first pH of the first aqueous phase to the second pH.3. The amphiphilic particle of wherein the first type of multiphasic mixture is a water in oil emulsion and the second type of multiphasic mixture is an oil in water emulsion.4. An amphiphilic particle adapted to stabilize a water in oil in water emulsion comprising encapsulated water droplets and an aqueous phase having a first pH claim 1 , and further adapted to cause the release of the encapsulated water by adjusting the aqueous phase to a second pH.5. A collection of amphiphilic particles which are shape- and amphiphilicity-tunable by varying pH values.6. A method for inverting a first type of multiphasic mixture comprising a first aqueous phase and having a first pH into a second type of multiphasic mixture comprising a second aqueous phase and having a second pH comprising the steps of:adding an amphiphilic particle to the first type of multiphasic mixture; andadjusting at least one of a volume fraction of a component phase of the first type of multiphasic mixture and a ...

SUPER ABSORBENT POLYMER AND PREPARATION METHOD THEREOF

The super absorbent polymer according to the present invention has reduced 3-hour saline solution re-wet while having a high absorption rate and absorption against pulp, and thus can be used for hygienic materials such as diapers, thereby exhibiting excellent performance. 1. A super absorbent polymer comprising:a base polymer powder containing a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having an acidic group in which at least a part thereof is neutralized; anda surface crosslinked layer formed on the base polymer powder and containing a second crosslinked polymer in which the first crosslinked polymer is additionally cross-linked via a surface crosslinking agent,wherein the super absorbent polymer has an absorption rate (vortex) of 50 seconds or less,an absorption against pulp of 15 g/g or more, anda 3-hour saline solution re-wet of 1.0 g or less.2. The super absorbent polymer of claim 1 , wherein it has an absorption rate of 45 seconds or less.3. The super absorbent polymer of claim 1 , wherein it has an absorption against pulp of 18 g/g or more.4. The super absorbent polymer of claim 1 , wherein it has an absorbency under pressure at 0.9 psi (0.9 AUP) of 9 g/g or more.5. The super absorbent polymer of claim 1 , wherein it has a gel bed permeability (GBP) of 9 Darcy or more.6. The super absorbent polymer of claim 1 , wherein it has a centrifuge retention capacity (CRC) of 28 g/g or more.7. A method for preparing a super absorbent polymer comprising the steps of:crosslinking a water-soluble ethylenically unsaturated monomer having an acidic group in which at least a part thereof is neutralized in the presence of an internal crosslinking agent to form a hydrogel polymer containing a first crosslinked polymer;drying, pulverizing and classifying the hydrogel polymer to form a base polymer power; andheat-treating and surface-crosslinking the base polymer powder in the presence of a surface crosslinking solution to form a super ...

GEL COMPOSITIONS, SHAPED GEL ARTICLES AND A METHOD OF MAKING A SINTERED ARTICLE

Reaction mixtures, gel compositions that are a polymerized product of the reaction mixtures, shaped gel articles that are formed within a mold cavity and that retain the size and shape of the mold cavity upon removal from the mold cavity, and sintered articles prepared from the shaped gel articles are provided. The sintered article has a shape identical to the mold cavity (except in regions where the mold cavity was overfilled) and to the shaped articles but reduced in size proportional to the amount of isotropic shrinkage. Methods of forming the sintered articles also are provided. 1. A method of making a sintered article , the method comprising:providing a mold having a mold cavity;positioning a reaction mixture within the mold cavity, the reaction mixture comprising:{'sub': '2', 'a. 20 to 60 weight percent zirconia-based particles based on a total weight of the reaction mixture, the zirconia-based particles having an average particle size no greater than 100 nanometers and comprising at least 70 mole percent ZrO;'}b. 30 to 75 weight percent of a solvent medium based on the total weight of the reaction mixture, the solvent medium comprising at least 60 percent of an organic solvent having a boiling point equal to at least 150° C.;c. 2 to 30 weight percent polymerizable material based on a total weight of the reaction mixture, the polymerizable material comprising (1) a first surface modification agent having a free radical polymerizable group and a surface modifying group, the first surface modification agent being a first monomer; andd. a photoinitiator for a free radical polymerization reaction;polymerizing the reaction mixture to form a shaped gel article that is in contact with the mold cavity;removing the shaped gel article from the mold cavity, wherein the shaped gel article retains a size and shape identical to the mold cavity (except in regions where the mold cavity was overfilled);forming a dried shaped gel article by removing the solvent medium; ...

MULTISCALE POROUS POLYMER FILMS

Porous polyelectrolyte multilayer (PEM) films with pore size control ranging from nano- to micro-scale. A layer-by-layer (LbL) technique is used to fabricate PEMs, and the built up PEMs are subject to subsequent porous treatment under acidic conditions. Besides shortening the processing time, polyelectrolytes with high molecular weight are used for the first time. Multi-scale porous structures are provided with either micro-sized porous structure on top of nano-sized porous structure or the other way around. 1. A polyelectrolyte multilayer thin film having pores in the film , wherein at least some of the pores have a diameter of 20 to 50 nm.2. The film of claim 1 , wherein the film comprises alternating layers of polycation and polyacrylic acid.3. The film of claim 2 , wherein the polyacrylic acid has a weight average molecular weight over 100 claim 2 ,000 g/mole.4. A polyelectrolyte multilayer thin film claim 2 , having a hydrophobic surface characterized by a contact angle with water of greater than 150°.5. The film of claim 4 , wherein the contact angle is 160° or greater.6. The film of claim 4 , wherein the film comprises alternating layers of polycation and of polyacrylic acid.7. A polyelectrolyte multilayer thin film comprising built up alternating layers of polycation and polyanion claim 4 , wherein the polyanion comprises poly acrylic acid having a weight average molecular weight of greater than 100 claim 4 ,000 g/mole.8. The polyelectrolyte multilayer thin film according to claim 7 , wherein the polyacrylic acid has a weight average molecular weight of about 225 claim 7 ,000 g/mole.9. The polyelectrolyte multilayer thin film according to claim 8 , wherein the film has a smooth morphology.10. The polyelectrolyte multilayer thin film according to claim 8 , wherein the film has a microporous morphology.11. A method of making a polyelectrolyte multilayer thin film using layer by layer assembly of alternating polycation and polyanion claim 8 , the method ...

Superabsorbent Polymer and Preparation Method Thereof

Provided are a superabsorbent polymer and a preparation method thereof. According to the present invention, a superabsorbent polymer having high centrifuge retention capacity and absorption rate may be prepared by using a specific foam stabilizer. 1. A superabsorbent polymer comprising a base polymer resulting from polymerization and internal crosslinking of a monomer composition including acrylic acid-based monomers having acidic groups which are at least partially neutralized; and a surface crosslinking layer formed on the surface of the base polymer , wherein the base polymer has centrifuge retention capacity (CRC) of 35 g/g or more as measured in accordance with EDANA WSP 241.3 , absorption rate of 40 seconds or less as measured by a vortex method , and bulk density of 0.51 g/mL to 0.70 g/mL.2. The superabsorbent polymer of claim 1 , wherein the acrylic acid-based monomer is represented by the following Formula 1:{'br': None, 'sup': 1', '1, 'R—COOM\u2003\u2003[Formula 1]'}{'sup': '1', 'wherein Ris an alkyl group containing an unsaturated bond and having 2 to 5 carbon atoms, and'}{'sup': '1', 'Mis a hydrogen atom, a monovalent or divalent metal, an ammonium group, or an organic amine salt.'}3. The superabsorbent polymer of claim 1 , wherein the acrylic acid-based monomer includes one or more selected from the group consisting of acrylic acid claim 1 , methacrylic acid claim 1 , and monovalent metal salts claim 1 , divalent metal salts claim 1 , ammonium salts claim 1 , and organic amine salts thereof.4. The superabsorbent polymer of claim 1 , wherein the base polymer is internally crosslinked by one or more internal crosslinking agents selected from the group consisting of N claim 1 ,N′-methylenebisacrylamide claim 1 , trimethylolpropane tri(meth)acrylate claim 1 , ethylene glycol di(meth)acrylate claim 1 , polyethylene glycol (meth)acrylate claim 1 , polyethylene glycol di(meth)acrylate claim 1 , propylene glycol di(meth)acrylate claim 1 , polypropylene glycol ( ...

METHOD FOR PREPARING SUPER ABSORBENT RESIN

The present invention relates to a method for preparing a superabsorbent polymer including a) preparing a hydrogel phase polymer by thermopolymerizing or photopolymerizing a monomer composition including a water-soluble ethylenically unsaturated monomer and a polymerization initiator; b) chopping the hydrogel phase polymer; c) adding particles having properties of the following i) and ii) to the chopped hydrogel phase polymer; d) chopping the particle-added hydrogel phase polymer again; e) drying the hydrogel phase polymer; f) milling the dried hydrogel phase polymer; g) adding a surface crosslinking agent to the milled hydrogel phase polymer; and h) carrying out a surface crosslinking reaction. 1. A method for preparing a superabsorbent polymer comprising:a) preparing a hydrogel phase polymer by thermopolymerizing or photopolymerizing a monomer composition including a water-soluble ethylenically unsaturated monomer and a polymerization initiator;b) chopping the hydrogel phase polymer;c) adding particles having properties of the following i) and ii) to the chopped hydrogel phase polymer;d) chopping the particle-added hydrogel phase polymer again;e) drying the hydrogel phase polymer;f) milling the dried hydrogel phase polymer;g) adding a surface crosslinking agent to the milled hydrogel phase polymer; andh) carrying out a surface crosslinking reaction,{'sup': 2', '2, 'wherein i) BET specific surface area of 300 m/g to 1500 m/g and ii) porosity of 50% or greater.'}2. The method for preparing a superabsorbent polymer of claim 1 , wherein the particles have particle sizes of 2 nm to 50 μm.3. The method for preparing a superabsorbent polymer of claim 1 , wherein the particles have superhydrophobicity with a contact angle of 125° or greater for water.4. The method for preparing a superabsorbent polymer of claim 1 , wherein the particles have particle sizes of 2 nm to 50 μm and have superhydrophobicity with a contact angle of 125° or greater for water.5. The method for ...

Method Of Preparing Superabsorbent Polymer

A superabsorbent polymer according to the present invention has excellent initial absorption properties, and thus it may be used in sanitary materials such as diapers, etc., thereby exhibiting excellent performances. 1. A method of preparing a superabsorbent polymer , the method comprising the following steps of:performing crosslinking polymerization of a water-soluble ethylene-based unsaturated monomer having acidic groups which are at least partially neutralized in the presence of an internal crosslinking agent and a surfactant to form a hydrogel polymer containing a first crosslinked polymer (Step 1);drying, pulverizing, and size-sorting the hydrogel polymer to form a base polymer powder (Step 2); andperforming surface-crosslinking of the base polymer powder by heat treatment in the presence of a surface crosslinking solution to form superabsorbent polymer particles (Step 3),wherein a maximum foaming point reaches within 100 seconds from a polymerization initiation point of the water-soluble ethylene-based unsaturated monomers in Step 1.2. The method of claim 1 , wherein Step 1 is performed additionally in the presence of a foaming agent.3. The method of claim 2 , wherein the foaming agent is one or more selected from the group consisting of sodium bicarbonate claim 2 , sodium carbonate claim 2 , potassium bicarbonate claim 2 , potassium carbonate claim 2 , calcium bicarbonate claim 2 , calcium carbonate claim 2 , magnesium bicarbonate claim 2 , magnesium carbonate claim 2 , 2 claim 2 ,2′-azobis(2-methylpropionamidine) dihydrochloride claim 2 , azodicarbonamide claim 2 , dinitroso pentamethylene tetramine claim 2 , p claim 2 ,p′-oxybisbenzenesulfonylhydrazide claim 2 , and p-toluenesulfonyl hydrazide.4. The method of claim 1 , wherein the surfactant is a compound represented by the following Chemical Formula 2 or sugar ester:{'br': None, 'sub': '3', 'R—SONa\u2003\u2003[Chemical Formula 2]'}in Chemical Formula 2,R is an alkyl group having 8 to 16 carbon atoms.5. ...

Process for Producing Surface Postcrosslinked Water-Absorbing Polymer Particles

A process for producing surface postcrosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated, before, during or after the surface postcrosslinking, with at least one basic salt of a trivalent metal cation and a monovalent carboxylic acid anion. 1. A process for producing water-absorbing polymer particles by polymerizing a monomer solution or suspension comprisinga) at least one ethylenically unsaturated monomer which bears acid groups and may be at least partly neutralized,b) at least one crosslinker,c) at least one initiator,d) optionally one or more ethylenically unsaturated monomer copolymerizable with the monomer specified under a), ande) optionally one or more water-soluble polymer, comprising drying, grinding, classifying and surface postcrosslinking, which comprises coating the water-absorbing polymer particles, before, during, or after the surface postcrosslinking, with at least one basic salt of a trivalent metal cation and a monovalent carboxylic acid anion,wherein the at least one basic salt comprises one or more non-eliminable hydroxyl anion,and wherein a molar ratio of metal cation to carboxylic acid anion in the basic salt is from 0.6 to 1.2 and the amount of trivalent metal cation is from 0.0008 to 0.2 mol per 100 g of the water-absorbing polymer particles.2. (canceled)3. The process according to claim 1 , wherein the trivalent metal cation is an aluminum cation.4. The process according to claim 1 , wherein the monovalent carboxylic acid anion is an acetate anion.5. The process according to claim 1 , wherein the basic salt comprises at least one stabilizer.6. The process according to claim 5 , wherein the stabilizer is boric acid.7. The process according to claim 1 , wherein the basic salt is used as an aqueous solution.8. Water-absorbing polymer particles prepared by the process according to .9. Water-absorbing polymer particles comprisingi) at least one polymerized ethylenically unsaturated monomer ...