СПОСОБ ПОЛУЧЕНИЯ МОДИФИЦИРОВАННОГО ПОЛИТЕТРАФТОРЭТИЛЕНА, СПОСОБ ПОЛУЧЕНИЯ ПОРОШКА МОДИФИЦИРОВАННОГО ПОЛИТЕТРАФТОРЭТИЛЕНА И СПОСОБ ПОЛУЧЕНИЯ РАСТЯНУТОГО ПОРИСТОГО МАТЕРИАЛА

Изобретение относится к способам получения модифицированного политетрафторэтилена. Предложен способ получения модифицированного политетрафторэтилена, который включает проведение сополимеризации тетрафторэтилена и мономера, имеющего полярную группу, в дисперсии 1, содержащей полимер, содержащий звенья на основе нефторированного мономера, и водную среду,при таких условиях, что количество используемого мономера, имеющего полярную группу, составляет самое большее 0,150% мас. относительно всего количества тетрафторэтилена, подаваемого в систему полимеризации,причём мономер, имеющий полярную группу, представляет собой мономер, представленный формулой (3), где заместители R31 и R32, каждый независимо, представляют собой атом водорода или атом фтора, заместитель R33 означает атом водорода, атом фтора или алкильную группу, которая может быть замещена атомом фтора, L3 означает простую связь или двухвалентную связующую группу, и заместитель R34 представляет собой полярную группу -SO3M или группу – ...

СПОСОБЫ ПРОИЗВОДСТВА ВОДНОЙ ЭМУЛЬСИИ, ТОНКОДИСПЕРСНОГО ПОРОШКА И РАСТЯНУТОГО ПОРИСТОГО ТЕЛА ИЗ МОДИФИЦИРОВАННОГО ПОЛИТЕТРАФТОРЭТИЛЕНА

FIELD: chemistry. SUBSTANCE: present invention relates to a method of producing an aqueous emulsion of modified polytetrafluoroethylene, a method of producing a fine powder of modified polytetrafluoroethylene and a method of producing a stretched porous body of modified polytetrafluoroethylene. Method of producing an aqueous emulsion of modified polytetrafluoroethylene is a method of producing an aqueous emulsion of non-molten particles of modified polytetrafluoroethylene, having an average primary particle diameter of 0.10–0.30 mcm, in which tetrafluoroethylene and perfluoroalkylethylene, represented by following formula (1), are subjected to emulsion polymerisation in an aqueous medium using a polymerisation initiator in the presence of a fluorinated anionic surfactant having LogPOW of 2.4 to 3.4, where fluorinated anionic surfactant is a fluorinated surfactant having 6 or 7 carbon atoms, 0 or 1 hydrogen atom, 0 or 1 to 4 oxygen atoms in form of ether groups, -COOA group, where A is H, NH 4 or an alkali metal atom, and the remaining atoms are fluorine atoms, and said fluorinated anionic surfactant is used in amount of 0.2 to 2 wt. % with respect to final obtained amount of modified polytetrafluoroethylene, wherein the amount of the perfluoroalkylethylene used is from 120 to 3000 ppm (by weight) based on the final obtained amount of the modified polytetrafluoroethylene, when initiating the emulsion polymerisation, the presence of the entire amount of perfluoroalkylethylene, and the polymerisation initiator used is either one or both combinations of a combination of bromate and bisulphite or sulphite and a combination of permanganate and oxalic acid: CH 2 = CH-Rf (1), where Rf is C 1-6 a perfluoroalkyl group, wherein the polymerisation initiator is added such that either the reducing or oxidising reagent is previously present in the polymerisation reaction system, and then adding another reagent continuously or intermittently, reducing reagent or oxidising reagent ...

СПОСОБ ОЧИСТКИ ФТОРИРОВАННОГО СОЕДИНЕНИЯ

Изобретение относится к эффективному способу очистки фторированного соединения, который включает перегонку жидкости, содержащей по меньшей мере один член, выбранный из группы, состоящей из фторированного соединения, представленного следующей формулой (1), и фторированного соединения, представленного следующей формулой (2), удерживая ее при температуре нагрева не более 150°C, где температура нагрева является внутренней температурой котла перегонной колонны:в которых Rпредставляет собой фторированную алкильную группу, которая может иметь простой эфирный атом кислорода в своей основной цепи, Rпредставляет собой перфторалкиленовую группу, и Rпредставляет собой C-Cалкильную группу, и в котором жидкость представляет собой жидкость, полученную из любого жидкого отхода после того как водная эмульсия фторполимера коагулировала и фторполимер отделен, водную жидкость, полученную отмывкой отходящего газа на стадии сушки и/или стадии термической обработки отделенного фторполимера, или жидкость, полученную ...

СПОСОБ КОАГУЛЯЦИИ СУЛЬФИРОВАННЫХ БЛОК-СОПОЛИМЕРОВ

Настоящее изобретение относится к способу коагуляции сульфированного блок-сополимера из его раствора в органическом растворителе. Описан способ коагуляции сульфированного блок-сополимера из раствора, содержащего блок-сополимер и один или несколько органических растворителей, и способ включает: (а) стадию эжектирования, которая включает эжектирование раствора сополимера в или на умеренно перемешиваемую воду с образованием коагуляционной смеси, где эжектированный раствор сополимера по существу не содержит водяной пар; и вода находится при рабочем давлении и при рабочей температуре ниже ее температуры кипения; и (б) стадию выдерживания, которая включает умеренное перемешивание коагуляционной смеси, полученной на стадии (а), при давлении выдерживания и при температуре выдерживания ниже температуры кипения воды в течение периода, достаточного, чтобы по существу полностью испарить один или несколько органических растворителей. Технический результат – предложенный способ коагуляции прост при реализации ...

СПОСОБ КОАГУЛЯЦИИ МЕЛКОДИСПЕРСНЫХ ПОРОШКОВ ПОЛИТЕТРАФТОРЭТИЛЕНА

ПОЛУЧАЕМЫЙ МНОГОСТАДИЙНОЙ ПОЛИМЕРИЗАЦИЕЙ ПОЛИМЕР, ЕГО СОСТАВ, СПОСОБ ЕГО ПОЛУЧЕНИЯ, ЕГО ПРИМЕНЕНИЕ И СОДЕРЖАЩАЯ ЕГО КОМПОЗИЦИЯ

КОМПОЗИЦИИ АГРЕГИРОВАННЫХ ЧАСТИЦ

... 1. Коагулированная порошкообразная композиция, включающая привитой полимер (А), содержащий, по меньшей мере, одну эластичную полимерную фазу и, по меньшей мере, одну жесткую полимерную фазу, причем наиболее удаленная от центра часть привитого полимера (А) включает жесткую полимерную фазу; водорастворимое полимерное соединение (В), обладающее свойством физического гелеобразования; и гелеобразующий агент (С) для него, причем содержание водорастворимого полимерного соединения (В), обладающего свойством физического гелеобразования, составляет от 0,01 до 3,0 частей по массе на 100 частей по массе привитого полимера (А) и содержание жесткой полимерной фазы, служащей самой удаленной от центра частью привитого полимера (А), составляет от 0,5 до 10 мас.%. 2. Коагулированная порошкообразная композиция по п.1, дополнительно включающая от 0,05 до 3,0 частей по массе антиадгезива (D) на 100 частей по массе привитого полимера (А). 3. Коагулированная порошкообразная композиция по п.1, в которой содержание ...

СПОСОБЫ ПРОИЗВОДСТВА ВОДНОЙ ЭМУЛЬСИИ, ТОНКОДИСПЕРСНОГО ПОРОШКА И РАСТЯНУТОГО ПОРИСТОГО ТЕЛА ИЗ МОДИФИЦИРОВАННОГО ПОЛИТЕТРАФТОРЭТИЛЕНА

СПОСОБ ПОЛУЧЕНИЯ ПОЛИМЕРНЫХ КОМПОЗИТОВ С ТЕРМОПЛАСТИЧНЫМИ СВОЙСТВАМИ

... 1. Способ получения композитного материала, включающий следующие стадии ! (а) коагулирование одной или более водных дисперсий полимера для получения коагулированной полимерной дисперсии со средневзвешенным размером частиц, составляющим от примерно 1 до примерно 1000 мкм; ! (б) соединение частиц одного или более сшитых каучуков с трехмерной структурой с коагулированной водной полимерной дисперсией с образованием смеси водных дисперсий в водной дисперсии; ! (в) твердофазное измельчение нарезкой водной дисперсионной смеси; и ! (г) снижение содержания влаги в смеси. ! 2. Способ по п.1, дополнительно включающий замешивание смеси перед формованием изделия. ! 3. Способ по п.1, в котором коагулирование одной или более водных полимерных дисперсий проводят в присутствии частиц одного или более сшитого каучука с трехмерной структурой с образованием смеси в водной дисперсии. ! 4. Способ по п.1, в котором ситовый размер частиц сшитого каучука с трехмерной структурой составляет 150 мкм (80 меш) или более ...

СПОСОБ КОАГУЛЯЦИИ ФТОРПОЛИМЕРОВ И КОМПОЗИЦИИ

... 1. Способ получения пергалогенированного полимера, заключающийся в коагуляции латекса, содержащего частицы полимеров с использованием ониевого соединения в качестве коагулирующего агента, где частицы полимеров состоят, в основном, из сополимеризованных звеньев, представленных одним или несколькими пергалогенированным(и) сомономером(ами), и, по крайней мере, одного мономера с участком сшивки, причем полимер содержит мономер с азотсодержащим участком сшивки и полимер способен к отверждению без добавления дополнительных компонентов, и коагуляция осуществляется, по существу, в отсутствии ионов металлов или солей металлов, и факультативно латекс может быть получен в системе, по существу, не содержащей фторированного эмульгатора. 2. Способ по п.1, отличающийся тем, что включает также промывание полимера и факультативную сушку полимера. 3. Способ по п.1, отличающийся тем, что ониевое соединение соответствует формуле RkQ(+)X(-), где каждый R может независимо являться водородом или замещенной либо ...

Verfahren zum Koagulieren von durch Polymerisation erhaltenen waessrigen Emulsionen von Vinylpolymerisaten

Herstellungsverfahren mikroskopisch feiner, gefärbter Teilchen und elektrophotographische Toner die die Teilchen umfassen

Verfahren zur Tonerherstellung

Improvements in and relating to the Treatment of Rubber Latex.

... 24,342. Lange, W. G. ten H. de. Oct. 27. Latex, coagulating.-Rubber is graded as to quality during coagulation of the latex. In a smoke-chamber 6 provided with furnace 18 and baffles 22, a series of rollers 7, 8, 9 are arranged vertically one above the other, preferably increasing in diameter towards the bottom, and geared so as to rotate in opposite directions. Latex is led by a pipe 3 to the upper roller 7. The best rubber coagulates on this roller, and the rest of the latex flows on to the roller 8, where the second quality coagulates, and so on, water collecting in a tank 17. When a sufficient thickness of rubber is coagulated, it is removed through doors 23.

Dispersions of fluorine-containing polymers

Dilute aqueous dispersions of polytetrafluorethylene are concentrated and stabilized by adding a surface-active agent to the dilute dispersion, flocculating the polymer by insolubilizing the surface agent, separating the flocculated polymer from the bulk of the aqueous phase and forming a concentrated dispersion by peptization of the polymer floc. The surface agent may be ionic or non-ionic. Specified ionic agents are ammonium pentadecane-8 sulphonate, sodium dodecylbenzene sulphonate, C-cetylbetaine, stearyltrimethyl-ammonium bromide, polyammonium styrene/maleamate, saturated long chain alkyl sodium sulphate, dioctyl ester of sodium sulphosuccinate, or a polyglycol ether. The non-ionic surface agents may be poly-N-vinyl caprolactam, polymethylvinyl ether, or polyethyl vinyl ether. The flocculating of the polymer may be effected by physical, e.g. salts or a thermal change, or chemical methods such as change in pH. Suitable salts are ammonium carbonate, ammonium nitrite, sodium sulphate, ...

Fluoropolymers with very low amounts of a fluorinated alkanoic acid or its salts

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE CONTINUOUS AGGLOMERATION OF PVC DISPERSIONS

PROCEDURE FOR THE PRODUCTION OF DRYING FINE POWDERS FROM FUSIONPROCESSABLE OR NICHTSCHMELZVERARBEITBAREN TFE (CO) POLYMERS

PROCEDURE FOR THE PRODUCTION OF A COPOLYMER FROM ALPHA METHYL STYRENE.

EMULSIONSCOPOLYMERISATION OF META OR PARAISOPROPENYL ALPHA, ALPHA DIMETHYLBENZYLISOCYANAT

PROCEDURE FOR THE HEAT SENSITIZING OF ANIONI AND NICHTIONI AQUEOUS ONE POLYMER DISPERSIONS

TWO-STAGE PROCEDURE FOR THE DRAINAGE OF PLASTIC DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

PROCEDURE FOR THE SALT-FREE COAGULATION OF POLYMER DISPERSIONS

Emulsion styrene-butadiene rubber

METHOD OF COAGULATING LATICES

PROCESS FOR THE COAGULATION OF AN AQUEOUS POLYMER LATEX

PATENT APPLICATION OF: Ju-Ming Hung Docket No. 83-48 For: COAGULATION PROCESS A process for the coagulation of an aqueous polymer latex comprises contacting the aqueous polymer latex with an effective amount of an aqueous solution of a water soluble non-nucleophilic, non-oxidative salt of an alkaline earth metal and removing the coagulated polymer from the aqueous medium. The polymer prepared by the process has a unique combination of properties.

COMPACTED AGGLOMERATES OF POLYMER LATEX PARTICLES

The present invention provides polymer latex grains having latex particles which compose each coagulated grain compacted therein in the state of not being mutually fused; said grains are obtained by the following steps of (A)-(E): (A) into a polymer latex manufactured by emulsion polymerization or suspension polymerization, a coagulant is added at a temperature lower than the temperature (softening temperature) at which latex particles are adhered by fusion, to be dispersed and scattered in said polymer latex as minute volumes of said coagulant, before said coagulant has been dissolved and diffused into said polymer latex; (B) by letting said coagulant dissolve and diffuse into said latex from the scattered minute volumes of said coagulant, the latex particles are coagulated on the outer surfaces of the minute volumes of said coagulant as the centers, to have coagulated grains grow from inside out, thereby forming spherical grains of an arbitrary range of sizes regularly filled with the ...

HEAT-SENSITIZATION OF ANIONIC AND NON-IONIC AQUEOUS POLYMER DISPERSIONS

AQUEOUS EMULSION POLYMERIZATION OF FLUORINATED MONOMERS IN THE PRESENCE OF A PARTIALLY FLUORINATED OLIGOMER AS AN EMULSIFIER

The present invention relates to a method for making a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in the presence of an oligomer that comprises one or more ionic groups, has a partially fluorinated backbone, a number average molecular weight of not more than 2000 g/mol and that has a combination of repeating units different from that of the fluoropolymer that is being produced by the polymerization of said one or more fluorinated monomers. Since the polymerization of the one or more fluorinated monomers to produce the desired fluoropolymer is carried out in the presence of the oligomer, the resulting dispersion will contain the oligomer in addition to the fluoropolymer. Thus, in a further aspect, the invention relates to an aqueous dispersion of a fluoropolymer comprising the oligomer.

Procédé de coagulation de dispersions de substances de poids moléculaire élevé.

Procédé de coagulation de dispersions de substances de poids moléculaire élevé.

Procédé de coagulation de dispersions de substances de poids moléculaire élevé.

Procédé de coagulation d'émulsions aqueuses de polymères vinyliques

VERFAHREN ZUM WAERMESENSIBILISIEREN VON ANIONISCHEN UND NICHTIONISCHEN WAESSRIGEN POLYMER-DISPERSIONEN.

Method of recovering fluorochemical surfactant

Methods for making composites having thermoplastic properties from recycled crosslinked polymer

The present invention relates to methods for making composites having thermoplastic properties from recycled crosslinked polymer and provides methods of making shapeable composites in the form of finely divided materials or articles and the materials and articles produced by the methods. The methods comprise forming mixtures by (i) treating an aqueous thermoplastic acrylic or vinyl polymer to increase the particle size thereof to a weight average particle size of 1 [mu]m or more, and, optionally, dewatering to form a crumb mixture; and (ii) combining a thermoplastic acrylic or vinyl polymer with one or more waste rubber vulcanizate having a sieve particle size ranging from 10 to 600mu m in the amount of from 15 to 95 wt.%, based on the total weight of polymer and rubber to form a crumb slurry, such that (ii) can take place before, during, after (i) but before any dewatering, or after any dewatering; and (iii) thermoplastic processing the mixture. Thermoplastic processing can directly form ...

RUBBER GRAFT COPOLYMER, AND THERMOPLASTIC RESIN COMPOSITION CONTAINING RUBBER GRAFT COPOLYMER

Polyelectrolyte and process for producing the polyelectrolyte

PROCESS FOR THE PRODUCTION OF POLYMERS OF ACRYLONITRILE AND STYRENE AND OF ACRYLONITRILE STYRENE AND BUTADIENE

Polymer recovery from dispersions or solns. - by mixing dispersions with coagulant and surfactant and solns. with steam

Process of coagulation and coalescence of fibres and films

METHOD OF PREPARATION OF LATEX OF RUBBERS CLERK'SS OFFICE FREE FROM COAGULATS, AND NEW PRODUCTS THUS OBTAINED

PROCESS AND APPARATUS TO CARRY OUT CHEMICAL REACTIONS

PROCESS FOR the COAGULATION Of a FLUORINATED ELASTOMER STARTING FROM an AQUEOUS DISPERSION

THERMOPLASTIC COMPOSITION MODIFIEE SHOCK AMELIOREE

La présente invention concerne des compositions thermoplastiques comprenant en tant que modifiant choc un élastomère contenant un polymère greffé préparé par le procédé de polymérisation en émulsion et récupéré par un procédé spécial en contrôlant et en ajustant la valeur de pH, l'utilisation des compositions thermoplastiques dans la production de corps moulés, et les corps moulés eux-mêmes. La présente invention concerne en outre des compositions thermoplastiques comprenant un modifiant choc polymère avec une structure cœur-écorce fabriqué par un procédé multi-étapes et récupéré par un procédé spécial en contrôlant et en ajustant la valeur de pH comprenant au moins un polymère à gradient, l'utilisation des compositions thermoplastiques dans la production de corps moulés, et les corps moulés eux-mêmes.

폴리카보네이트 수지용 강화제, 폴리카보네이트 수지 조성물 및 성형품

... 과제: 폴리카보네이트 수지에, 우수한 내충격성, 내열착색성 및 내습열성을 부여하는 것이 가능한 수지용 강화제를 제공한다. 해결수단: 고무질 그래프트 중합체로 이루어지는 폴리카보네이트 수지용 강화제로서, 해당 수지용 강화제 3질량부와 점도 평균 분자량 24,000의 방향족 폴리카보네이트 수지 97질량부를 특정한 조건 하에서 성형하여 얻어지는 성형체에 대하여 측정되는, 온도 140℃에서의 12시간의 열처리에 의한 YI값의 증가량이 36 이하이며, 온도 120℃, 상대 습도 100%의 조건 하에서의 60시간 열처리에 의한 MFR값의 증가량이 3 이하인, 수지용 강화제. 해당 수지용 강화제와 폴리카보네이트 수지를 포함하는 수지 조성물.

METHOD FOR OBTAINING HIGH PURITY EMULSION POLYMERS

PURPOSE: A method for obtaining high purity emulsion polymers is provided to realize an ecological and economic process for the emulsion polymers with both high purity and good product quality. CONSTITUTION: Monomers are polymerized in the presence of an emulsifier. The polymer obtained from unreacted monomers is fed. The polymer is treated with an acid and optionally the addition of additional precipitants. The acid has a pH≤6. The resulting polymer suspension is adjusted to a pH≧11. The polymer is removed from suspension. The polymer is sheared until the residual moisture level is ≤20%. The emulsifier is an alkali metal salt of a fatty acid, a resin acid or a mixture there of. The fatty acid salt is an alkali metal salt of oleic acid. © KIPO 2004 ...

METHOD OF REDUCING METAL CONTENT IN FLUOROELASTOMER

A method of producing a fluoroelastomer reduced in the content of metallic ingredients; and a molded article comprising a fluoroelastomer sufficiently reduced in the content of metallic ingredients. The method comprises producing a fluoroelastomer without using a metal oxide through fluoromonomer polymerization, coagulation, and drying, wherein at least one of the starting materials excluding gaseous monomers contains substantially no metallic ingredients. The fluoroelastomer obtained by this method has a metal content of 50 ppm or lower. © KIPO & WIPO 2007 ...

METHOD FOR PRODUCING THERMOPLASTIC MOLDING MATERIALS CONTAINING RUBBER

The invention relates to a method for producing thermoplastic molding materials containing rubber, according to which at least one rubber- elastic polymerizate A and at least one thermoplastic polymer B are produced by polymerization and are mixed together. After polymerization, the rubber-elastic polymerizate A exists while dispersed in an aqueous phase. The invention is characterized in that at least one pH buffer system is added to the aqueous phase after the polymerization of constituent A is completed. © KIPO & WIPO 2007 ...

Method of preparing resin powder and integrated coagulator for the same

Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.

METHOD FOR PRODUCING ACRYLIC RUBBER

METHOD FOR PRODUCING ACRYLIC RUBBER The present invention provides a method for producing an acrylic rubber, comprising an emulsion polymerization step of emulsion polymerizing monomers for forming the acrylic rubber in the presence of a nonionic emulsifier and an anionic emulsifier to prepare a polymer emulsion; and a coagulation step of coagulating the polymer emulsion through addition of a coagulant thereto to yield hydrous crumbs. The present invention can provide a method for producing an acrylic rubber which can appropriately reduce fouling generated in a polymerization apparatus during polymerization, and can effectively prevent mutual adhesion between hydrous crumbs. [No Suitable Figure] ...

METHOD FOR PRODUCING POLYTETRAFLUOROETHYLENE FINE POWDER

Provided is a method for producing a PTFE fine powder having high bulk density and low concentration of non-flocculated PTFE in flocculent drainage. In the present invention, a PTFE emulsion is produced by emulsion-polymerization of TFE in the presence of an aqueous medium, one or more types of fluorine-containing emulsifiers selected from the group consisting of fluorine-containing carboxylic acids and salts thereof having 4-7 carbon atoms and 1-4 etheric oxygen atoms in the main chain thereof, and a radical polymerization initiator, the resultant PTFE emulsion is adjusted to a PTFE concentration of 10-25 mass%, flocculent agitation is performed at a flocculation temperature of 5-18°C, a non-dried PTFE fine powder is separated out, and the obtained non-dried PTFE fine powder is dried to produce a PTFE fine powder.

HIGH PURITY TRANSPARENT PERFLUOROELASTOMER PARTS AND A PROCESS TO PRODUCE THE SAME

Crosslinkable perfluoroelastomer compositions having low metal content and low compression set when crosslinked, and processes for producing the same, are provided. Compositions comprising terpolymers of TFE, PAVE, and CNVE having a metal content of less than 3000 ppb may be formed into high purity transparent perfluoroelastomer parts.

FLUOROPOLYMER DISPERSION TREATMENT EMPLOYING HIGH PH AND OXYGEN SOURCE TO REDUCE FLUOROPOLYMER RESIN DISCOLORATION

Process for reducing thermally induced discoloration of fluoropolymer resin produced by polymerizing fluoromonomer in an aqueous dispersion medium to form aqueous fluoropolymer dispersion and isolating said fluoropolymer from said aqueous medium to obtain said fluoropolymer resin. The process comprises: adjusting the pH of the aqueous medium of the aqueous fluoropolymer dispersion to greater than about 8.5; and exposing said aqueous fluoropolymer dispersion to an oxygen source.

Continuous production process of particulate polymer and control method of the particle size of said polymer

The invention discloses a process for the production of a particulate polymer which contains few fine particles and has a narrow particle size distribution and a controlled bulk specific gravity. Characteristic features of the process of this invention reside in that a polymer latex obtained by emulsion polymerization is successively processed through the following steps (I) and (II): Step (I) The polymer latex is coagulated into a slurry in which particles thus coagulated are dispersed in water. Step (II) The slurry obtained in Step (I), an organic liquid almost insoluble in water and incapable of dissolving the polymer and water are mixed for granulation under the conditions that (a) The proportion of water in the whole mixture is 50-85 wt. %, (b) The amount of the organic liquid is 15-150 parts by weight per 100 parts by weight of the polymer in the polymer latex, and (c) The temperature T (°C.) of the whole mixture is maintained for 0.5 minute to 1 hour on average within the range of ...

PROCESS FOR RECOVERING NITRILE POLYMER SOLIDS FROM LATEX

Process for the removal of residual monomers from ABS polymers

Process for the removal of residual monomers from ABS polymers prepared by emulsion polymerization, wherein from 0.1 to 10% by weight, based on the solids content in the latex, of an electrolyte such as an acid or a salt are added to a latex containing an ABS polymer, and the mixture is at the same time heated to a temperature of from 55 DEG to 120 DEG C. while the residual monomer and part of the water are removed by distillation.

PRODUCTION METHOD AND PRODUCTION DEVICE FOR POLYMER

A production method for a polymer comprises: a step (A) of polymerizing a raw material monomer to obtain a polymer-containing liquid containing a polymer; a step (B) of separating a collection target component-containing fluid containing a collection target component composed of at least one of a solvent and a residual monomer, from the polymer-containing liquid; a step (C) of supplying the collection target component-containing fluid to a three-product distillation column, and separating a fraction containing an impurity higher in boiling point than the collection target component and a fraction containing an impurity lower in boiling point than the collection target component, to obtain a fraction containing the collection target component of high purity; and a step (D) of performing polymerization using the fraction containing the collection target component of high purity.

Tire member manufacturing method and tire manufacturing method

In Formula (I), R1 and R2 each indicates a hydrogen atom, an alkyl group having 1 to 20 carbons, an alkenyl group having 1 to 20 carbons, or an alkynyl group having 1 to 20 carbons, R1 and R2 may be the same or different, and M+ indicates sodium ion, potassium ion, or lithium ion.

ELECTROLYTE EMULSION AND PROCESS FOR PRODUCING SAME

A method for producing an electrolyte emulsion, the method including: Step (1) in which an ethylenic fluoromonomer and a fluorovinyl compound having an SO2Z1 group, wherein Z1 is a halogen element, are copolymerized at a polymerization temperature of 0° C. or higher and 40° C. or lower to provide a precursor emulsion containing a fluoropolymer electrolyte precursor; and Step (2) in which a basic reactive liquid is added to the precursor emulsion and the fluoropolymer electrolyte precursor is chemically treated, whereby an electrolyte emulsion with a fluoropolymer electrolyte dispersed therein is provided, wherein the electrolyte emulsion has an equivalent weight (EW) of 250 or more and 700 or less.

ACRYLIC POLYMER COAGULATES

The present invention provides a multilayered acrylic polymer coagulate characterized in that the coagulate has a bulk density of 0.3 to 0.6 g/cmand a median diameter of 50 to 400 μm and contains particles having a particle diameter of 75 or less in a proportion of 50% or less, and the amount of alkali metal and alkaline earth metal contained in the coagulate satisfies the following formula (1): 1. A multilayered acrylic polymer coagulate having a bulk density of 0.3 to 0.6 g/cmand a median diameter of 50 to 400 μm and comprising particles having a particle diameter of 75 μm or less in a proportion of 50% or less , wherein amounts of an alkali metal and an alkaline earth metal contained in the multilayered acrylic polymer coagulate satisfies formula (1):{'br': None, 'i': N/a', '−Tg, 'Σ()×(120)≤100 \u2003\u2003(1)'}whereinN represents the amount amounts of the alkali metal and the alkaline earth metal contained in the multilayered acrylic polymer coagulate (mmol/kg),Tg represents a glass transition temperature (° C.) of an acetone-soluble matter of the multilayered acrylic polymer coagulate, anda represents a valency of the alkali metal and the alkaline earth metal contained in the multilayered acrylic polymer coagulate.2. The multilayered acrylic polymer coagulate according to claim 1 , wherein the multilayered acrylic polymer coagulate is obtained by a salting-out coagulation method.3. The multilayered acrylic polymer coagulate according to claim 1 , whereina multilayered acrylic polymer in the multilayered acrylic polymer coagulate consists of the acetone-soluble matter and an acetone-insoluble matter;{'sub': 1', '8, 'the acetone-soluble matter comprises 80 to 99 mass % of a structural unit derived from methyl methacrylate and 1 to 20 mass % of a structural unit derived from alkyl acrylate having a C-Calkyl group, and has a glass transition temperature of 80 to 100° C.; and'}{'sub': 1', '8, 'the acetone-insoluble matter comprises 20 to 60 mass % of a structural ...

Hairy polymeric nanoparticles

This invention discloses a process for synthesizing a hairy polymer particle which comprises the steps of (1) polymerizing a vinyl aromatic monomer by emulsion polymerization in an aqueous medium to produce core particles, (2) recovering the core particles from the aqueous medium, (3) dispersing the core particles in an organic solvent, (4) adding an organo-lithium compound to the dried core particles in the organic solvent to produce the hairless core initiator, and (5) utilizing the hairless core initiator to initiate the anionic polymerization of a conjugated diolefin monomer in an organic solvent to produce a solution of the hairy polymer particles. The hairy polymer nanoparticles can then be recovered from the organic solvent. These hairy polymer particles are comprised of (1) a core which is comprised of a polymer of a vinyl aromatic monomer and (2) hairs which are polymer chains of a conjugated diolefin monomer, wherein the hairs are covalently bonded to the core. The core is typically ...

Recycled thermoplastic composition comprising waste thermoset material and methods of making

The present invention provides methods for making shapeable composite materials or shaped articles from recycled materials comprising forming a crumb slurry by, in any order, increasing the particle size of a composition comprising white water waste from one or more emulsion or dispersion polymer and combining the white water waste polymer with one or more waste thermoset material, preferably, ground tire rubber (GTR), and, then processing the combined material wet or dry as a thermoplastic to form the composite material or article. Additionally, shaped articles and composite materials can be made from substantially all recycled waste materials, such as white water waste from acrylic or vinyl polymer emulsions and waste rubber vulcanizates. The composite materials can consist essentially of reshapeable materials, i.e. without crosslinking agents, thermosettable compositions or compatibilizers to provide reshapeable or recyclable articles.

Process for coagulating fluoroelastomers

In a process for the manufacture of fluoroelastomers, a coagulant is employed that is a water-soluble polymer having at least 2 quaternary onium centers. Specific examples of such coagulants include, but are not limited to poly(diallyldimethylammonium chloride), poly(epichlorohydrin-co-dimethyl amine), and poly(acrylamide-co-diallyldimethylammonium chloride).

Method for manufacturing rubber-reinforced styrenic resin powder and rubber-reinforced styrenic resin powder

A method for manufacturing a rubber-reinforced styrenic resin powder comprising 40% by mass or more of a rubbery polymer, satisfying the following conditions (1) to (4): (1) at least first and second coagulation baths are provided; (2) the first and second coagulation baths are connected; (3) an emulsified dispersion of fatty acid amide is supplied to the connecting part in an amount of 0.2 parts by mass to 2.0 parts by mass (solid content) with respect to 100 parts by mass (solid content) of a slurry; and (4) a temperature in the second coagulation bath is equal to or higher than a temperature in the first coagulation bath.

PROCESS FOR PRODUCTION OF AQUEOUS POLYTETRAFLUOROETHYLENE DISPERSION FOR COAGULATION PROCESSING, AND AQUEOUS POLYTETRAFLUOROETHYLENE DISPERSION FOR COAGULATION PROCESSING

To provide a process for producing an aqueous PTFE dispersion for coagulation processing, whereby it is possible to efficiently produce an aqueous PTFE dispersion for coagulation processing excellent in coagulation properties of PTFE microparticles, and such an aqueous PTFE dispersion for coagulation processing. A synthetic adsorbent having a specific surface area of from 100 to 2,000 m2/g, is added to an aqueous PTFE dispersion containing from 45 to 70 mass% of PTFE microparticles having an average particle size of from 0.10 to 0.50 µm and from 2.2 to 6 mass%, based on the mass of the PTFE microparticles, of a nonionic surfactant, in a proportion of from 0.5 to 15 mass%, based on the mass of the PTFE microparticles, followed by stirring or shaking and then by separation into a liquid phase and a solid phase, and recovering an aqueous PTFE dispersion for coagulation processing which contains from 45 to 70 mass% of PTFE microparticles having an average particle size of from 0.10 to 0.50 ...

METHOD FOR THE PRODUCTION OF POLYMER POWDERS

METHOD FOR PRODUCING THERMOPLASTIC MOLDING MATERIALS CONTAINING RUBBER

Stabilisation of fluoropolymers

ФТОРСОДЕРЖАЩИЙ ПОЛИМЕР С НИЗКИМ ОСТАТОЧНЫМ СОДЕРЖАНИЕМ ФТОРИРОВАННОГО ЭМУЛЬГАТОРА И СПОСОБ ЕГО ПОЛУЧЕНИЯ

Изобретение имеет отношение к фторсодержащему полимеру и способу его получения. Фторсодержащий полимер получают эмульсионной полимеризацией фторированного мономера в водной среде, содержащей фторированный эмульгатор формулы XCF2CF2(O)mCF2CF2OCF2COOA, где Х представляет собой атом водорода или фтора, А представляет собой атом водорода, ион щелочного металла или NH4 и m является целым числом от 0 до 1, и коагуляцией полученной водной эмульсии с последующей сушкой при температуре не более чем 230°С. Остаточное количество фторированного эмульгатора составляет самое большее 10 миллионных долей. Технический результат - получение фторсодержащего полимера с низким остаточным количеством фторированного эмульгатора и фактически не содержащего перфтороктановой кислоты или ее соли. 2 н. и 6 з.п. ф-лы, 3 табл.

СПОСОБ ПОЛУЧЕНИЯ КОМПОЗИЦИИ, СОДЕРЖАЩЕЙ МНОГОСТУПЕНЧАТЫЙ ПОЛИМЕР (ВАРИАНТЫ), И ПРИМЕНЕНИЕ ЭТОЙ КОМПОЗИЦИИ В КАЧЕСТВЕ МОДИФИКАТОРА УДАРНОЙ ПРОЧНОСТИ ТЕРМОПЛАСТИЧНЫХ ПОЛИМЕРОВ

Изобретение относится к способу получения композиции, содержащей многоступенчатый полимер (варианты), к применению композиции. Способ получения полимерной композиции, содержащей многоступенчатый полимер, включает стадии: а) полимеризации посредством эмульсионной полимеризации мономера или смеси мономеров (А) для получения во время этой стадии одного слоя (А), содержащего полимер (A1) с температурой стеклования, составляющей от -120 до 0°C, b) полимеризации посредством эмульсионной полимеризации в присутствии полимера, полученного на стадии а), мономера или мономерной смеси (В) для получения на этой последующей стадии слоя (В), содержащего полимер (В1), имеющий температуру стеклования, составляющую от 45 до 150°C, с) коагуляции многоступенчатого полимера с солью щелочного металла, d) промывки многоступенчатого полимера, e) регулировки значения рН после коагуляции в диапазоне от 5 до 10, f) добавления водного раствора или дисперсии, содержащей фосфорсодержащее соединение, где фосфор имеет ...

ПЕРФТОРЭЛАСТОМЕРНЫЕ ГЕЛИ

FIELD: chemistry. ^ SUBSTANCE: there is described a perfluoroelastomer gel which contains TFE based perfluoroelastomers with at least another (per) fluorinated comonomer having at least one ethylene-type unsaturated bond, and having the following properties: appearance: transparent gelatinous solid; water content between 10% and 90 wt %; density between 1.1 and 2.1 g/cm3; the said gel satisfies the following test: the gel dried in a drying chamber at 90C until a constant weight, gives a curable perfluoroelastomer and the gel is obtained using a method which involves the following steps, beginning with polymerisation perfluoroelastomer latex: C. preparing an aqueous solution containing an electrolyte, the obtained solution C. has freezing point which is lower or equal to glass transition point Tg (C) of the perfluoroelastomer latex; D. cooling the polymerisation latex to temperature T1 below or equal to glass transition point of the perfluoroelastomer latex; E. cooling aqueous solution C to temperature T2 below or equal to glass transition point of perfluoroelastomer latex, T2 is virtually equal to T1; F. formation of the gel by injecting the mixture D into the solution E. Described also are cross linked perfluoroelastomers obtained from the perfluoroelastomer gel; cured perfluoroelastomers obtained by cross linking perfluoroelastomers; industrial articles which contain cured perfluoroelastomers and use of the gel to coat the industrial articles. ^ EFFECT: simplification of the method. ^ 38 cl, 6 ex, 2 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 394 043 (13) C2 (51) МПК C08F 14/18 (2006.01) C08F 214/18 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (30) Конвенционный приоритет: 22.06.2004 IT MI 2004 A 001251 (73) Патентообладатель(и): СОЛВЕЙ СОЛЕКСИС С. п. А. (IT) (43) Дата публикации заявки: 27.12.2006 2 3 9 4 0 4 3 (45) Опубликовано: 10.07.2010 Бюл. № 19 Адрес для переписки: 121087, Москва, ...

Способ получения бутадиен-стирольного каучука

Настоящее изобретение относится к способу получения бутадиен-стирольных каучуков эмульсионной (со)полимеризацией. Способ включает сополимеризацию бутадиена со стиролом в эмульсии в присутствии радикальных инициаторов, стопперирование процесса, дегазацию, введение антиоксиданта и выделение каучука из латекса методом коагуляции. В качестве коагулирующего агента используют неионогенный полиакриламид в интервале температур 0-20°С. Предлагаемый способ получения бутадиен-стирольного каучука позволяет стабилизировать процесс коагуляции, снизить загрязнение окружающей среды, уменьшить расход коагулирующего агента, уменьшить себестоимость получаемого продукта, снизить водопотребление и создать замкнутый технологический цикл. 3 табл., 3 пр. РОССИЙСКАЯ ФЕДЕРАЦИЯ ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) (19) RU (11) (13) 2 760 489 C1 (51) МПК C08F 236/10 (2006.01) C08F 236/06 (2006.01) C08F 36/06 (2006.01) C08C 1/14 (2006.01) C08C 1/15 (2006.01) C08F 2/22 (2006.01) C08F 6/22 (2006.01) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C08F 236/10 (2021.08); C08F 236/06 (2021.08); C08F 36/06 (2021.08); C08C 1/14 (2021.08); C08C 1/15 (2021.08); C08F 2/22 (2021.08); C08F 6/22 (2021.08) (21)(22) Заявка: 2021111520, 22.04.2021 22.04.2021 Дата регистрации: 25.11.2021 (45) Опубликовано: 25.11.2021 Бюл. № 33 2 7 6 0 4 8 9 R U (54) Способ получения бутадиен-стирольного каучука (57) Реферат: Настоящее изобретение относится к способу получения бутадиен-стирольных каучуков эмульсионной (со)полимеризацией. Способ включает сополимеризацию бутадиена со стиролом в эмульсии в присутствии радикальных инициаторов, стопперирование процесса, дегазацию, введение антиоксиданта и выделение каучука из латекса методом коагуляции. В качестве коагулирующего агента используют Стр.: 1 (56) Список документов, цитированных в отчете о поиске: КИРПИЧНИКОВ П.А., АВЕРКОАНТОНОВИЧ Л.А., АВЕРКОАНТОНОВИЧ Ю.О. ХИМИЯ И ТЕХНОЛОГИЯ СИНТЕТИЧЕСКОГО КАУЧУКА: УЧЕБНИК ДЛЯ ВУЗОВ. 3-Е ИЗД., ПЕРЕРАБ.- Л.: ХИМИЯ, 1987, 424 ...

ФТОРСОДЕРЖАЩИЙ ПОЛИМЕР С НИЗКИМ ОСТАТОЧНЫМ СОДЕРЖАНИЕМ ФТОРИРОВАННОГО ЭМУЛЬГАТОРА И СПОСОБ ЕГО ПОЛУЧЕНИЯ

... 1. Фторсодержащий полимер, который получают эмульсионной полимеризацией фторированного мономера в водной среде, содержащей фторированный эмульгатор формулы (1): ! XCF2CF2(O)mCF2CF2OCF2COOA, ! где Х представляет собой атом водорода или атом фтора, ! А представляет собой атом водорода, ион щелочного металла или NH4, и m является целым числом из числа 0 или 1, ! и коагуляцией полученной водной эмульсии с последующей сушкой, ! в котором остаточное количество фторированного эмульгатора формулы (1) составляет не более, чем 10 миллионных долей. ! 2. Фторсодержащий полимер по п.1, где фторированный эмульгатор формулы (1) представляет собой CF3CF2OCF2CF2OCF2COONH4. ! 3. Фторсодержащий полимер по п.1, где вышеуказанный фторированный мономер представляет собой, по меньшей мере, один мономер, выбираемый из группы, состоящей из тетрафторэтилена, винилиденфторида, гексафторпропилена, простого перфтор(алкилвинилового эфира), хлортрифторэтилена, полифторалкилэтилена, перфтор(2,2-диметил-1,3-диоксол)а, ...

СПОСОБ ПОЛУЧЕНИЯ ВОДНОЙ ПОЛИТЕТРАФТОРЭТИЛЕНОВОЙ ДИСПЕРСИИ ДЛЯ ПРОЦЕССА КОАГУЛЯЦИИ И ВОДНАЯ ПОЛИТЕТРАФТОРЭТИЛЕНОВАЯ ДИСПЕРСИЯ ДЛЯ ПРОЦЕССА КОАГУЛЯЦИИ

... 1. Способ получения водной дисперсии политетрафторэтилена для процесса коагуляции, который включает добавление синтетического адсорбента, имеющего удельную площадь поверхности от 100 до 2000 м/г, в водную дисперсию политетрафторэтилена, содержащую от 45 до 70% масс. микрочастиц политетрафторэтилена, имеющих средний размер частиц от 0,10 до 0,50 мкм и от 2,2 до 6% масс. в расчете на массу микрочастиц политетрафторэтилена, неионогенного поверхностно-активного вещества, в пропорции от 0,5 до 15% масс. в расчете на массу микрочастиц политетрафторэтилена с последующим перемешиванием или встряхиванием и затем разделением на жидкую фазу и твердую фазу, и извлечение жидкой фазы.2. Способ получения водной дисперсии политетрафторэтилена для процесса коагуляции по п.1, где после добавления синтетического адсорбента в водную дисперсию политетрафторэтилена проводят перемешивание или встряхивание в течение 1-100 часов и затем осуществляют разделение, что приводит к тому, что концентрация неионогенного ...

ПЕРФТОРЭЛАСТОМЕРНЫЕ ГЕЛИ

ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2005 119 134 (13) A (51) ÌÏÊ C08K 5/14 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2005119134/04, 21.06.2005 (71) Çà âèòåëü(è): ÑÎËÂÅÉ ÑÎËÅÊÑÈÑ Ñ. ï. À. (IT) (30) Êîíâåíöèîííûé ïðèîðèòåò: 22.06.2004 IT MI 2004 A 001251 (43) Äàòà ïóáëèêàöèè çà âêè: 27.12.2006 Áþë. ¹ 36 A 2 0 0 5 1 1 9 1 3 4 R U ãäå R'Fn ðàâåí RFn, èëè ORFn, ãäå RFn ïðåäñòàâë åò ñîáîé ëèíåéíûé èëè ðàçâåòâëåííûé ïåðôòîðàëêèëüíûé ðàäèêàë ñ 1-5 àòîìàìè óãëåðîäà, ïðåäïî÷òèòåëüíî R'Fn=OCF3; X1n è X2n, îäèíàêîâûå èëè îòëè÷íûå äðóã îò äðóãà, ïðåäñòàâë þò ñîáîé F, CF3; (ïåð)ôòîðâèíèëîâûå ýôèðû (MOVE) îáùåé ôîðìóëû CFXAI=CXAIOCF2ORAI (A-1), ãäå RAI ïðåäñòàâë åò ñîáîé Ñ2-Ñ6 ëèíåéíóþ, ðàçâåòâëåííóþ èëè C5-C6 öèêëè÷åñêóþ ïåðôòîðàëêèëüíóþ ãðóïïó, èëè Ñ2-Ñ6 ëèíåéíóþ, ðàçâåòâëåííóþ ïåðôòîðîêñèàëêèëüíóþ ãðóïïó, ñîäåðæàùóþ îò îäíîãî äî òðåõ àòîìîâ êèñëîðîäà; RAI íåîá çàòåëüíî ñîäåðæèò îò 1 Ñòðàíèöà: 1 RU A (57) Ôîðìóëà èçîáðåòåíè 1. Ïåðôòîðýëàñòîìåðíûé ãåëü, èìåþùèé ñëåäóþùèå ñâîéñòâà: âíåøíèé âèä: ïðîçðà÷íîå ãåëåîáðàçíîå òâåðäîå âåùåñòâî; ñîäåðæàíèå âîäû îò 10 äî 90% ïî âåñó; ïëîòíîñòü îò 1,1 äî 2,1 ã/ñì 3; óêàçàííûé ãåëü óäîâëåòâîð åò ñëåäóþùåìó èñïûòàíèþ: âûñóøåííûé â ñóøèëüíîé êàìåðå ïðè 90°Ñ äî ïîñòî ííîãî âåñà ãåëü äàåò îòâåðæäàåìûé ïåðôòîðýëàñòîìåð. 2. Ïåðôòîðýëàñòîìåðíûé ãåëü ïî ï.1, ñîäåðæàùèé ïåðôòîðýëàñòîìåðû, îñíîâàííûå íà TFE, ñ, ïî êðàéíåé ìåðå, äðóãèì (ïåð)ôòîðèðîâàííûì ñîìîíîìåðîì, èìåþùèì, ïî êðàéíåé ìåðå, îäíó íåíàñûùåííóþ ñâ çü ýòèëåíîâîãî òèïà. 3. Ïåðôòîðýëàñòîìåðíûé ãåëü ïî ï.2, ãäå ñîìîíîìåð â ïåðôòîðýëàñòîìåðàõ âûáðàí èç ñëåäóþùèõ: - CF2=CFORf (ïåð)ôòîðàëêèëâèíèëîâûå ýôèðû (PAVE), ãäå Rf ïðåäñòàâë åò ñîáîé C1-Ñ6 (ïåð)ôòîðàëêèë; - CF2=CFOX (ïåð)ôòîðîêñèàëêèëâèíèëîâûå ýôèðû, ãäå Õ ïðåäñòàâë åò ñîáîé C1-Ñ12 (ïåð)ôòîðîêñèàëêèë, ñîäåðæàùèé îäíó èëè áîëåå ïðîñòûõ ýôèðíûõ ãðóïï; ïåðôòîðäèîêñîëû ôîðìóëû 2 0 0 5 1 1 9 1 3 4 (54) ÏÅÐÔÒÎÐÝËÀÑÒÎÌÅÐÍÛÅ ÃÅËÈ R U Àäðåñ äë ïåðåïèñêè: ...

WÄSSRIGE EMULSIONSPOLYMERISATION FLUORIERTER MONOMERE IN ANWESENHEIT EINES TEILWEISE FLUORIERTEN OLIGOMERS ALS EMULGATOR

VERFAHREN ZUR KONTINUIERLICHEN KOAGULATION VON WÄSSRIGEN PFROPFKAUTSCHUKDISPERSIONEN UND VORRICHTUNG DAFÜR

METHOD FOR TREATING EMULSIFIED LATEX

VERFAHREN ZUR HERSTELLUNG VON EINEM ULTRAREINEN FLUORPOLYMER

IN-LINE COAGULATION PROCESS FOR FLUOROELASTOMER EMULSIONS

VERFAHREN ZUR HERSTELLUNG VON HOCHREINEN DURCHSCHEINENDEN PERFLUORELASTOMER-GEGENSTÄNDEN

Process for core-shell impact modifiers and impact modified thermoplastic composition with enhanced hydrolytic resistance

The present invention relates to a process for producing impact modifiers, impact modified thermoplastic molding compositions and in particular impact modified polycarbonate or polycarbonate/polyester blends having improved resistance to degradation. More particularly the present invention relates to a process for producing polymeric impact modifiers with a core-shell structure made by a multistage process comprising a control and adjustment if necessary of the pH value before and during the recovery step.

Perfluoroelastomer gels

Perfluoroelastomeric gel having the following properties: appearance: transparent gelatinous solid; water content between 10% and 90% by weight; density between 1.1 and 2.1 g/cm 3 ; said gel satisfies the following test: dried in a stove at 90° C. until a constant weight gives curable perfluoroelastomers.

POLYCHLOROPRENE SOLID HAVING THIXOTROPIC PROPERTIES

The invention relates to a polychloroprene solid on the basis of a polychloroprene dispersion, said solid having thixotropic properties. 1. Solid polychloroprene based on a polychloroprene dispersion , characterized in that it has thixotropic properties.2. Solid polychloroprene according to claim 1 , characterized in that a solution of solid polychloroprene pretreated by shearing has a decrease in structural order and claim 1 , at rest claim 1 , an increase in structural order of the same solution of solid polychloroprene.3. Solid polychloroprene according to claim 2 , characterized in that the thixotropic property (change in viscosity) occurs over the course of time.4. Solid polychloroprene according to claim 3 , characterized in that the thixotropic property is determined by means of the Brookfield viscosity method.5. Solid polychloroprene according to claim 4 , characterized in that it is obtained from a polychloroprene dispersion which has been produced by means of an emulsion polymerization at a polymerization temperature greater than 30° C. claim 4 , preferably between 35° C. and 50° C.6. Solid polychloroprene according to claim 5 , characterized in that the pretreatment decreases the melt viscosity (Mooney 1+4 at 100° C. claim 5 , ASTM D 1646).7. Solid polychloroprene according to claim 6 , characterized in that the pretreatment for the melt viscosity is performed by means of a roller.8. Process for isolating and obtaining solid polychloroprene according to any of the preceding claims claim 6 , characterized in that an aqueous polychloroprene dispersion is contacted with water vapour comprising coagulant claim 6 , which coagulates the solid polychloroprene.9. Process according to claim 8 , characterized in that the solid polychloroprene is separated from the coagulation suspension.10. Process according to claim 9 , characterized in that the solid polychloroprene is dewatered by means of a dewatering apparatus.11. Process according to claim 10 , characterized ...

Acrylic resin powder, resin composition, hot melt adhesive composition containing acrylic resin powder and method for producing same

An acrylic resin powder soluble in acetone, including a multi-stage polymer (M) that includes a polymer (B) obtained by polymerizing a monomer mixture (b) containing methyl methacrylate and an alkyl (meth)acrylate ester (mb) in the presence of a polymer dispersion that contains a polymer (A) obtained by polymerizing a monomer mixture (a) containing an alkyl (meth)acrylate ester (ma), in which an alkyl group in the alkyl (meth)acrylate ester (ma) has 4 to 8 carbon atoms, an alkyl group in the alkyl (meth)acrylate ester (mb) has 4 to 8 carbon atoms, a glass transition temperature of the polymer (A) is 20° C. or lower, a glass transition temperature of the polymer (B) obtained by polymerizing the monomer mixture (b) is 55° C. or higher, and a mass average molecular weight of the multi-stage polymer (M) is 10,000 or more and 300,000 or less.

METHOD OF PREPARING VINYL CYANIDE COMPOUND-CONJUGATED DIENE COMPOUND-AROMATIC VINYL COMPOUND GRAFT COPOLYMER, AND THERMOPLASTIC RESIN COMPOSITION INCLUDING GRAFT COPOLYMER

A copolymer is prepared by graft-polymerizing 20 to 40% of an aromatic vinyl compound and 1 to 20% of a vinyl cyanide compound onto 50 to 70% of conjugated diene rubber latex having a solids content of 30 to 65% by weight, coagulating the latex by adding 0.04 to 0.27 parts by weight of a first nonionic polymer coagulant, and 0.47 to 1.65 parts by weight of a second cationic polymer coagulant or 0.73 to 3.35 parts by weight of a second anionic polymer coagulant to 100 parts by weight (based on solids) of the prepared graft copolymer latex. When the second coagulant is the cationic polymer coagulant, the total weight of coagulant is 0.7 to 1.7 parts by weight, and when the second coagulant is the anionic polymer coagulant, the total weight of coagulant is 0.97 to 3.37 parts by weight. 1. A method of preparing a vinyl cyanide compound-conjugated diene compound-aromatic vinyl compound graft copolymer , the method comprising:preparing graft copolymer latex by graft-polymerizing 20 to 40% by weight of an aromatic vinyl compound and 1 to 20% by weight of a vinyl cyanide compound onto 50 to 70% by weight of conjugated diene rubber latex having a solids content of 30 to 65% by weight; andcoagulating and aging the prepared graft copolymer latex by adding 0.04 to 0.27 parts by weight of a nonionic polymer coagulant as a first coagulant, and 0.47 to 1.65 parts by weight of a cationic polymer coagulant or 0.73 to 3.35 parts by weight of an anionic polymer coagulant as a second coagulant to 100 parts by weight (based on solids) of the prepared graft copolymer latex,wherein, when the second coagulant is the cationic polymer coagulant, a total weight of the nonionic polymer coagulant and the cationic polymer coagulant is 0.7 to 1.7 parts by weight, and when the second coagulant is the anionic polymer coagulant, a total weight of the nonionic polymer coagulant and the anionic polymer coagulant is 0.97 to 3.37 parts by weight.2. The method according to claim 1 , wherein the cationic ...

METHODS FOR IMPROVING THE BASE COLOR OF PLASTIC BY REDUCING BIOLOGICAL GROWTH IN THE LATEX SYSTEM

Disclosed herein are methods of preparing a polymeric latex as the intermediary of a polymerization process. The disclosed methods further provide treatments for preventing biological growth on latex during storage extended storage at elevated temperatures. 1. A method comprisingcombining, in a reactor or a reactor vessel, monomers, an emulsifier or surfactant, and an initiator in solution at a temperature of from 48.9° C. (120° F.) to 82.2° C. (180° F.) to form a polymeric latex;directing the polymeric latex into a storage system comprising a storage vessel;subjecting the polymeric latex to an aging time in the storage vessel, such that the polymeric latex exhibits less than 1000 CFU/ml of biological growth according to ASTM D 5465-93 (2012) upon completion of the aging time, optionally comprising a treatment for reducing biological growth; andcoagulating the polymeric latex, wherein the polymeric latex is exposed to a mixture of water and a coagulant and filtered to provide a resin.2. The method of claim 1 , wherein the aging time in the storage vessel is ≦18 hrs.3. The method of claim 1 , wherein the temperature in the storage vessel is ≦60° C.4. The method of claim 1 , further comprising combining the monomers claim 1 , emulsifier claim 1 , and initiator with a chain transfer agent and/or a crosslinking agent.5. The method of claim 1 , further comprising grafting the polymeric latex with unsaturated monomer to yield a polymeric material comprising a rigid phase and a grafted latex phase.6. The method of claim 1 , wherein the monomers comprise a mixture of styrene acrylonitrile claim 1 , butadiene claim 1 , butyl acrylate claim 1 , methyl methacrylate claim 1 , or a combination thereof.7. The method of claim 1 , wherein the polymeric latex comprises acrylonitrile-butadiene-styrene claim 1 , acrylonitrile styrene acrylate claim 1 , styrene acrylonitrile claim 1 , styrene encapsulated polytetrafluoroethylene claim 1 , methyl methacrylate modified acrylonitrile ...

Rubber graft copolymer, and thermoplastic resin composition containing rubber graft copolymer

The present invention relates to a thermoplastic resin composition comprising a rubber graft copolymer comprising a core layer containing a rubber copolymer and a shell layer grafted on the core layer and a thermoplastic resin comprising a polycarbonate resin and an aliphatic polyester resin in the mass ratio of the rubber graft copolymer/the thermoplastic resin of 3/100 or more, wherein the shell layer is obtained by polymerizing or copolymerizing a (meth)acrylate monomer having an epoxy group, and the amount of the (meth)acrylate monomer having an epoxy group is 3 parts by mass or more and less than 29 parts by mass based on 100 parts by mass of the rubber graft copolymer. The thermoplastic resin composition of the present invention can be utilized in various applications.

Process for preparing an aqueous dispersion of polymeric microspheres

The present invention relates to composition comprising an aqueous dispersion of microspheres and a class of a nonionic polyalkylene oxide of a distyryl or tristyryl phenol or an anionic polyalkylene oxide salt of a distyryl or tristyryl phenol and a process for preparing the composition. The microspheres have an average particle size in the range of from 1 μm to 25 μm, as well as a low coefficient of variation and low gel concentration; the composition is useful in coatings applications, especially where a matte finish is desired.

TIRE MEMBER MANUFACTURING METHOD AND TIRE MANUFACTURING METHOD

A first tire member manufacturing method includes an operation in which a pre-coagulation rubber latex containing carbon black, for which a ratio of specific surface area as determined by nitrogen adsorption NSA (in units of m/g) to an amount of iodine absorption IA (in units of mg/g) is not less than 1.00, is coagulated to obtain a coagulum; an operation in which a compound according to Formula (I), below, is added to the water-containing coagulum; and an operation in which the compound according to Formula (I), below, is dispersed within the coagulum. 2. The tire member manufacturing method according to whereinthe operation in which the compound is dispersed within the coagulum is an operation in which the compound is dispersed within the coagulum as the coagulum is being dewatered.3. The tire member manufacturing method according to wherein claim 1 ,at the operation in which the compound is added to the coagulum, taking the amount of water in the coagulum for every 100 parts by mass of rubber within the coagulum to be Wa, and taking the amount of the compound that is added for every 100 parts by mass of rubber within the coagulum to be Wb, Wa/Wb, being the ratio of Wa to Wb, is in a range that is 1 to 8100.4. A tire manufacturing method comprising the tire member manufacturing method according to .6. A tire manufacturing method comprising the tire member manufacturing method according to . The present invention relates to a tire member manufacturing method and a tire manufacturing method.Patent Reference No. 1 discloses a method in which (2Z)-4-[(4-aminophenyl)amino]-4-oxo-2-butene acid sodium and carbon black are placed in a Banbury mixer and kneaded with rubber (hereinafter “prior manufacturing method”). Regarding (2Z)-4-[(4-aminophenyl)amino]-4-oxo-2-butene acid sodium, Patent Reference No. 1 further discloses that the terminal nitrogen functional group bonds to carbon black and that the carbon-carbon double-bond portion bonds to polymer.PATENT REFERENCE NO. 1 ...

Fluorinated elastic copolymer and method for its production, fluorinated elastic copolymer composition, and crosslinked rubber article

To provide a fluorinated elastic copolymer having a low content of metal elements and being excellent in crosslinkability. This fluorinated elastic copolymer has iodine atoms and has units a based on tetrafluoroethylene, units b based on a monomer having one polymerizable unsaturated bond (but excluding tetrafluoroethylene), and units c based on a fluorinated monomer having at least two polymerizable unsaturated bonds, wherein the metal content is at least 0.3 ppm by mass and at most 20.0 ppm by mass.

ACRYLIC RUBBER BALE EXCELLENT IN STORAGE STABILITY AND PROCESSABILITY

An acrylic rubber bale excellent in storage stability and processability, a method for producing the same, a rubber mixture obtained by mixing the acrylic rubber bale, and a rubber cross-linked product of the rubber mixture are provided. The acrylic rubber bale according to the present invention includes an acrylic rubber having a reactive group and a weight average molecular weight (Mw) of 100,000 to 5,000,000, wherein an amount of gel insoluble in methyl ethyl ketone is 50% by weight or less, and pH is 6 or less. 1. An acrylic rubber bale , comprisingan acrylic rubber having a reactive group and a weight average molecular weight (Mw) of 100,000 to 5,000,000, whereinan amount of gel insoluble in methyl ethyl ketone is 50% by weight or less, and pH is 6 or less.2. The acrylic rubber bale according to claim 1 , wherein the amount of gel insoluble in methyl ethyl ketone is 10% by weight or less.3. The acrylic rubber bale according to claim 1 , wherein all of 20 values of the amount of gel of the acrylic rubber bale measured at arbitrary 20 points fall within the range of (average value −5) to (average value +5) % by weight.4. The acrylic rubber bale according to claim 1 , wherein a ratio (Mz/Mw) of a Z-average molecular weight (Mz) to a weight average molecular weight (Mw) is 1.3 or more.5. The acrylic rubber bale according to claim 1 , wherein a complex viscosity ([η] 100° C.) at 100° C. is in the range of 1 claim 1 ,500 to 6 claim 1 ,000 Pa·s.6. The acrylic rubber bale according to claim 1 , wherein a ratio ([η] 100° C./[η] 60° C.) of a complex viscosity ([η] 100° C.) at 100° C. to a complex viscosity ([η] 60° C.) at 60° C. is 0.5 or more.7. The acrylic rubber bale according to claim 1 , wherein a ratio ([η] 100° C./[η] 60° C.) of a complex viscosity ([η] 100° C.) at 100° C. to a complex viscosity ([η] 60° C.) at 60° C. is 0.8 or more.8. The acrylic rubber bale according to claim 1 , wherein a specific gravity is in the range of 0.7 to 1.5.9. The acrylic rubber bale ...

PROCESS FOR RECOVERY OF RESIDUAL HYDROGENATION CATALYST FROM HYDROGENATED NITRILE RUBBER SOLUTION

Residual hydrogenation catalyst produced from reduction of nitrile rubber is recovered by a chelation step using a chelating agent and a series of extraction using semi-coagulation with polar solvents and an optional washing steps for the separation of catalyst-chelating agent complex from hydrogenated nitrile rubber solution. The chelating agent is selected from xanthate, dithiocarbamate, and trithiocarbonate compounds. 1. A process for recovering a metal catalyst from hydrogenated nitrile rubber solution comprising: a chelation step using a chelating agent; an extraction step using semi-coagulation; andan optional washing step using an organic solvent.2. The process of wherein the metal catalyst is selected from a palladium claim 1 , platinum claim 1 , rhodium claim 1 , or ruthenium catalyst.3. The process of wherein the hydrogenated nitrile rubber solution is composed of hydrogenated nitrile rubber claim 1 , metal catalyst claim 1 , and an organic solvent.4. The process of wherein the extraction step using semi-coagulation is obtained by a polar solvent to separate a metal catalyst-chelating agent complex from the hydrogenated nitrile rubber solution.5. The process of wherein the hydrogenated nitrile rubber contained in the solution is from about 1% to about 20% by weight.6. The process of wherein the extraction step using semi-coagulation claim 1 , washing step claim 1 , and the second extraction step using semi-coagulation are conducted in order to improve recovery of metal catalyst.7. The process of wherein the extraction step using semi-coagulation and washing step are simultaneous.8. The process of wherein the polar solvents for the semi-coagulation are selected from water claim 1 , methanol claim 1 , ethanol claim 1 , and isopropanol.9. The process of wherein the organic solvent for the hydrogenated nitrile rubber solution is selected from a ketone or an ether.10. The process of wherein the ketone is selected from acetone claim 9 , methyl ethyl ketone claim ...

Polytetrafluoroethylene aqueous dispersion

A PTFE aqueous dispersion having low viscosity at high temperature. The PTFE aqueous dispersion contains PTFE and a nonionic surfactant, has a PTFE solid concentration of 50 to 70% by mass, is substantially free from a fluorine-containing surfactant, and has a viscosity at 55° C. of 50 mPa·s or lower. Also disclosed is a method for producing the PTFE aqueous dispersion, a coating film obtained by applying the PTFE aqueous dispersion, an impregnated film obtained by impregnating the PTFE aqueous dispersion, and a coated article containing a coating film obtained by applying the PTFE aqueous dispersion.

Method for producing fluoropolymer, method for producing polytetrafluoroethylene, method for producing perfluoroelastomer, and composition

The present disclosure provides a method for producing a fluoropolymer, the method includes polymerizing a fluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the polymer (1) is a polymer of a monomer (1) represented by the general formula (1) below, in which the content of a dimer and a trimer of the monomer (1) is 1.0% by mass or less based on the polymer (1): CF 2 ═CF—R—CZ 1 Z 1 -A 0   ( 1 ) wherein R is a linking group; Z 1 and Z 2 are each independently F or CF 3 ; and A 0 is an anionic group.

METHOD FOR MANUFACTURING RUBBER-REINFORCED STYRENIC RESIN POWDER AND RUBBER-REINFORCED STYRENIC RESIN POWDER

A method for manufacturing a rubber-reinforced styrenic resin powder comprising 40% by mass or more of a rubbery polymer, satisfying the following conditions (1) to (4): 1. A method for manufacturing a rubber-reinforced styrenic resin powder comprising 40% by mass or more of a rubbery polymer , satisfying the following conditions (1) to (4):(1) at least first and second coagulation baths are provided;(2) the first and second coagulation baths are connected;(3) an emulsified dispersion of fatty acid amide is supplied to the connecting part in an amount of 0.2 parts by mass to 2.0 parts by mass (solid content) with respect to 100 parts by mass (solid content) of a slurry; and(4) a temperature in the second coagulation bath is equal to or higher than a temperature in the first coagulation bath.2. A rubber-reinforced styrenic resin powder comprising 40% by mass or more of a rubbery polymer , and having more than 4.0% by mass of the powder passing through a 200-mesh plain weave wire mesh (according to JIS G3555-2004) made of stainless steel wire with a wire diameter of 0.10 mm , wherein a fatty acid amide is present on 50% or more of the surface of the powder. The present invention relates to a method for manufacturing a rubber-reinforced styrenic resin powder and the rubber-reinforced styrenic resin powder.As an improvement in the storage stability (ease of sticking) of a rubbery polymer-containing resin powder, for example, Patent Literature 1 discloses a method of adding an anticaking agent through a specific step.Patent Literature 1: Japanese Unexamined Patent Publication No. H10-279640However, the method described in Patent Literature 1 is still insufficient from the viewpoint of continuous productivity. The present invention makes it a first object to provide a manufacturing method for a rubber-reinforced styrenic resin powder which is excellent in continuous productivity and antisticking property.Moreover, Patent Literature 1 describes that a powder having few ...

PRODUCTION METHODS FOR AQUEOUS EMULSION, FINE POWDER AND STRETCHED POROUS BODY OF MODIFIED POLYTETRAFLUOROETHYLENE

To provide a production method for an aqueous emulsion of modified polytetrafluoroethylene which is environmentally friendly and which is suitable for producing a stretched porous body having excellent breaking strength. A production method for an aqueous emulsion of modified polytetrafluoroethylene, which is a method to obtain an aqueous emulsion of modified polytetrafluoroethylene particles having an average primary particle diameter of from 0.10 to 0.30 μm, by subjecting tetrafluoroethylene and a perfluoroalkyl ethylene to emulsion polymerization in an aqueous medium, using a polymerization initiator, in the presence of a fluorinated anionic surfactant having a LogPOW of from 2.4 to 3.4, wherein the amount of the perfluoroalkyl ethylene to be used, is from 120 to 3,000 ppm to the final production amount of the modified polytetrafluoroethylene; at the initiation of the emulsion polymerization, the entire amount of the perfluoroalkyl ethylene is permitted to be present, and, as the polymerization initiator, either one or both of a combination of a bromate and a bisulfite or sulfite, and a combination of a permanganate and oxalic acid, are used. 2. The production method for an aqueous emulsion of modified polytetrafluoroethylene according to claim 1 , wherein the fluorinated anionic surfactant is a fluorinated surfactant having 6 or 7 carbon atoms claim 1 , 0 or 1 hydrogen atom claim 1 , 0 or from 1 to 4 etheric oxygen atoms claim 1 , a group represented by —COOA (A is H claim 1 , NHor an alkali metal atom) and the rest of atoms being fluorine atoms.3. The production method for an aqueous emulsion of modified polytetrafluoroethylene according to claim 1 , wherein the perfluoroalkyl ethylene is CH═CH(CF)F claim 1 , CH═CH(CF)F or CH═CH(CF)F.4. The production method for an aqueous emulsion of modified polytetrafluoroethylene according to claim 1 , wherein the fluorinated anionic surfactant is used in an amount of from 0.2 to 2 mass % to the final production amount of ...

Method of preparing abs graft copolymer and method of preparing thermoplastic resin composition

The present invention relates to a method of preparing an ABS graft copolymer and a method of preparing a thermoplastic resin composition including the ABS graft copolymer. More specifically, the present invention relates to a method of preparing an ABS graft copolymer, in which a predetermined amount of a vinyl aromatic compound and a predetermined amount of a vinyl cyanide compound are grafted to a small-diameter rubber latex before enlarging particle size of the small-diameter rubber latex is performed, and then enlarging particle size of the small-diameter rubber latex is performed by adding a certain amount of a polymer coagulant, and to a method of preparing a thermoplastic resin composition including the ABS graft copolymer. According to the present invention, latex stability may be improved, and an ABS graft copolymer having excellent impact resistance may be prepared.

METHOD FOR MANUFACTURING HYDROGENATED NITRILE RUBBER

A method produces a hydrogenated nitrile rubber having an iodine value of 120 or less, the method having a first coagulation step of adding a halogen atom-free metal salt as a coagulant to a nitrile rubber latex to form a nitrile rubber coagulum; a solution preparation step of dissolving the nitrile rubber coagulum in an organic solvent to prepare a nitrile rubber solution; a hydrogenation step of subjecting the nitrile rubber solution to a hydrogenation reaction to afford a hydrogenated nitrile rubber solution; and a second coagulation step of adding a divalent metal salt as a coagulant to the hydrogenated nitrile rubber solution to form a hydrogenated nitrile rubber coagulum. 1. A method for producing a hydrogenated nitrile rubber having an iodine value of 120 or less , the method comprising:a first coagulation step of adding a halogen atom-free metal salt as a coagulant to a nitrile rubber latex to form a nitrile rubber coagulum;a solution preparation step of dissolving the nitrile rubber coagulum in an organic solvent to prepare a nitrile rubber solution;a hydrogenation step of subjecting the nitrile rubber solution to a hydrogenation reaction to afford a hydrogenated nitrile rubber solution; anda second coagulation step of adding a divalent metal salt as a coagulant to the hydrogenated nitrile rubber solution to form a hydrogenated nitrile rubber coagulum.2. The method for producing a hydrogenated nitrile rubber according to claim 1 ,wherein the halogen atom-free metal salt is a metal sulfate.3. The method for producing a hydrogenated nitrile rubber according to claim 2 ,wherein the halogen atom-free metal salt is magnesium sulfate or aluminum sulfate.4. The method for producing a hydrogenated nitrile rubber according to claim 1 ,wherein the divalent metal salt is a divalent metal chloride.5. The method for producing a hydrogenated nitrile rubber according to claim 4 ,wherein the divalent metal salt is calcium chloride or magnesium chloride.6. The method for ...

Composition comprising functionalized rubber and graphene, processes and applications thereof

The present disclosure generally relates to the field of tyre technology and pertains to compositions employed for manufacturing tyre treads. More particularly, the present disclosure provides a composition comprising functionalized styrene butadiene polymer (SBR) and graphene as a reinforcing filler, and processes for preparation and applications thereof. The reinforcement of functionalized SBR with graphene filler shows homogeneous dispersion of graphene via chemical bonding with functionalized SBR, reduces particle-particle interactions of graphene filler, reduces filler-filler interaction and hence increases in filler-graphene interaction which shows the improvement in properties such as wet grip, rolling resistance, modulus, hardness and tensile properties, rheological properties etc. A tyre tread made of the present composition is superior to a tyre tread manufactured using a composition comprising traditional fillers, such as carbon black.

PROCESS FOR THE PRODUCTION OF POLYMERS VIA EMULSION POLYMERISATION

The present invention relates to a process for the production of a polymer comprising the steps of: a) polymerisation of an emulsion comprising a reaction mixture to obtain a polymeric latex; and b) coagulating the polymeric latex by exposing the polymeric latex to one or more coagulant, and isolating the coagulated product to obtain a polymer; wherein the polymeric latex obtained under a) is stored prior to coagulation step b) for at most such a time that the polymeric latex contains ≤500 CFU/ml of pigment-producing organisms as determined in accordance with ASTM D 5465-93 (2012) when subjecting the polymeric latex to coagulation step b). Such process allows for the production of a polymer having a reduced discoloration. The polymers may have a desirable appearance such as an opaque, white appearance. 1. A process for the production of a polymer comprising the steps of:a) polymerisation of an emulsion or suspension comprising a reaction mixture to obtain a polymeric latex; andb) coagulating the polymeric latex by exposing the polymeric latex to one or more coagulant, and isolating the coagulated product to obtain a polymer;wherein the polymeric latex obtained under a) is stored prior to coagulation step b) for at most such a time that the polymeric latex contains ≤500 CFU/ml of pigment-producing organisms as determined in accordance with ASTM D 5465-93 (2012) when subjecting the polymeric latex to coagulation step b).2. The process according to claim 1 , wherein the reaction mixture comprises one or more reactants selected from styrene claim 1 , acrylonitrile claim 1 , butadiene claim 1 , polybutadiene claim 1 , butyl(meth)acrylate claim 1 , poly(butyl acrylate) claim 1 , methyl(meth)acrylate claim 1 , or combinations thereof.3Bacillus, Microcossus, Serratia, FlavobacteriumPseudomonas.. The process according to claim 1 , where the pigment-producing organisms are bacteria selected from the genera or4Bacillus Lentus, Bacillus Subtilis Serratia MarcencensPseudomonas ...

PROCESS FOR THE ISOLATION OF SULFONYL FLUORIDE POLYMERS AND POLYMERS OBTAINED THEREFROM

The invention relates to a process for the isolation of (per)fluorinated polymers containing sulfonyl fluoride functional groups from a polymerization latex. The process comprises adding the polymerization latex to an aqueous electrolyte solution under high shear stirring at a temperature equal to or lower than the glass transition temperature of the polymer. The invention further relates to the (per)fluorinated polymers containing sulfonyl fluoride functional groups isolated by the process and characterised by a loss of weight at 200° C. lower than 1% as determined by thermogravimetric analysis. 1. A polymer comprising recurring units derived from at least one ethylenically unsaturated (per)fluorinated monomer (A) containing at least one sulfonyl fluoride group , wherein said polymer exhibits a loss of weight at 200° C. lower than 1% as measured by thermogravimetric analysis according to ASTM E1131-86 and wherein said polymer exhibits a melt flow rate measured according to ASTM D1238-04 at 200° C./5 kg of less than 50 g/10 min.2. The polymer according to further comprising recurring units of at least one ethylenically unsaturated (per)fluorinated monomer (B).3. The polymer according to wherein monomer (A) is present in an amount such that the equivalent weight of the polymer when converted into its acid form is less than 750 g/eq.4. The polymer according to wherein the equivalent weight of the polymer when converted into its acid form is at least 400 g/eq.5. (canceled)6. The polymer according to wherein monomer (A) is CF═CFOCFCF—SOF and monomer (B) is tetrafluoroethylene.7. A process for the isolation of a polymer of from a polymerization latex claim 1 , the process comprising adding said latex under high shear stirring to an aqueous electrolyte solution held at a temperature equal to or lower than the glass transition temperature of the polymer.8. The process of wherein the rate of stirring is such that the Reynolds number Re=ρ·N·d/μ wherein ρ is the density of ...

Method of preparing graft copolymer powder

The present invention relates to a method of preparing a graft copolymer powder, which includes: preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor and carrying out polymerization; preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and preparing a graft copolymer latex in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization; adding an alkyl methacrylate-based polymer to the graft copolymer latex and carrying out coagulation, and more particularly, to a method of preparing a graft copolymer powder that is excellent in weather resistance, fluidity, mechanical properties, surface gloss and appearance quality.

Cycloolefin rubber and method of production of same and rubber composition, cross-linked rubber, and tire

A cycloolefin rubber having a weight average molecular weight of 100,000 to 800,000, having a silyl group at the polymer chain end, and containing a fatty acid ester of a polyvalent alcohol. A cycloolefin rubber excellent in processability at the time of blending and kneading and excellent in low heat buildup property can be provided.

CONTINUOUS OR SEMI-CONTINUOUS FREEZING COAGULATION METHOD FOR AQUEOUS POLYMER DISPERSIONS

The present invention relates to a continuous or semi-continuous freeze coagulation process for aqueous polymer dispersions, wherein said process comprises a freezing step and a solid-liquid separation step and is further characterized in that it comprises the further step of admixing water and/or water vapor between the freezing step and the solid-liquid separation step. 3. The process according to claim 1 , wherein the freezing is effected on a cooled rotating roll claim 1 , wherein the roll dips into the aqueous polymer dispersion to be frozen.4. The process according to claim 1 , wherein at least 90% by weight of the total weight of the aqueous polymer dispersion is in a frozen state after the freezing.5. The process according to claim 1 , wherein the aqueous polymer dispersion is an aqueous polymer dispersion based on (meth)acrylate.6. The process according to claim 1 , wherein the aqueous polymer dispersion after the admixing has a weight-specific solid fraction in the range of 10%-99.5% of the weight-specific solid fraction of the aqueous polymer dispersion before the admixing.7. The process according to claim 1 , wherein the process further comprises thawing claim 1 , or thawing and sintering.8. The process according to claim 1 , wherein the process further comprises sintering claim 1 , wherein the sintering is effected at a sintering temperature T in the range of T≧T−50 K claim 1 , wherein Trepresents a glass transition temperature of a polymer of the aqueous polymer dispersion.9. The process according to claim 1 , further comprising compounding under optional admixing of a further additive after performing the solid-liquid separation;wherein the further additive if admixing is selected from the group consisting of (co)polymers based on (meth)acrylate, UV stabilizer packages, lubricants, dyes, processing aids, antioxidants, stabilizers, and mixtures thereof.10. The process according to claim 9 , further comprising drying claim 9 , compacting claim 9 , or ...

CORE-SHELL GRAFT COPOLYMERS WITH IMPROVED SURFACE PROPERTIES

Disclosed herein is a core-shell graft copolymer produced by coagulation of an aqueous latex comprising a quantity of particles of the copolymer and a quantity of a fatty acid surfactant, wherein the coagulation involves the addition of a quantity of a multivalent metal salt, preferably a bivalent or trivalent metal salt. Such copolymer provides in an improvement of the surface properties of moulded articles produced from such copolymers, as demonstrated by a reduction of the content of gels in the surface layer. 1. A core-shell graft copolymer , preferably a core-shell acrylonitrile-butadiene-styrene graft copolymer , produced by coagulation of an aqueous latex comprising ≥10.0 wt % and <40 wt % of particles of the copolymer and a quantity of a surfactant , wherein the coagulation involves the addition of a quantity of a lithium salt or a multivalent metal salt , preferably a bivalent or trivalent metal salt.2. The core-shell graft copolymer according to claim 1 , wherein the core-shell graft copolymer is an acrylonitrile-butadiene-styrene graft copolymer claim 1 , a methyl methacrylate-butadiene-styrene graft copolymer claim 1 , or an acrylonitrile-styrene-acrylate rubber graft copolymer.3. The core-shell graft copolymer according to claim 1 , wherein the core-shell graft copolymer is an acrylonitrile-butadiene-styrene graft copolymer.4. The core-shell graft copolymer according to claim 1 , wherein the surfactant is a fatty acid or a salt thereof claim 1 , or a mixture of fatty acids or salts thereof.5. The core-shell graft copolymer according to claim 1 , wherein the metal comprises at least one selected from beryllium claim 1 , magnesium claim 1 , calcium claim 1 , strontium claim 1 , barium claim 1 , radium claim 1 , aluminium claim 1 , or zinc; preferably at least one selected from magnesium claim 1 , aluminium claim 1 , zinc claim 1 , or calcium.6. The core-shell graft copolymer according to claim 1 , wherein the salt is a halogenide (preferably a chloride) ...

Aqueous Coagulatable Polymer Dispersion and Use Thereof as an Adhesive

The invention relates to an aqueous coagulatable polymer dispersion comprising at least one polymer which is dispersed in an aqueous phase, thermoplastic micro-spheres which contain a propellant, and at least one additional component which is selected from the group consisting of polyols, polyamines, and thermoplastic polymers. The invention further relates to a coagulate which can be obtained by the thermal and/or mechanical and/or ultrasonically-initiated coagulation of the aqueous polymer dispersion according to the invention, to an adhesive comprising or consisting of the coagulate, to a substrate which is completely or partly coated with said coagulate, to a method for producing such a coated substrate, and to coated substrates which can be obtained using said method. The coagulate can be used as an adhesive or as a binder in 3D-printing methods. 116-. (canceled)17. A coagulate obtainable by a thermal and/or mechanical and/or ultrasound-initiated coagulation of an aqueous polymer dispersion , comprising:{'sub': 2', '8, '(i) at least one polymer dispersed in an aqueous phase and selected from the group consisting of polyurethane, vinyl acetate/ethylene copolymers, poly(vinyl acetate) (PVAc), polyacrylate, poly(styrene/acrylate), styrene/butadiene (block) copolymer, styrene/isoprene (block) copolymer, polyisoprene copolymer, polychloroprene, polyolefin homopolymers and copolymers of C-Calkenes, polyepoxide and polylactic acid,'}(ii) thermoplastic microspheres containing a blowing agent, and(iii) at least one additional component selected from the group consisting of polyols, polyamines and thermoplastic polymers selected from the group consisting of polyamide, polyester and polystyrene.18. The coagulate according to claim 17 , wherein said polyol is selected from the group consisting of (poly)propylene glycol claim 17 , (poly)ethylene glycol claim 17 , glycerol claim 17 , and starch claim 17 , wherein said polyamine is urea claim 17 , and wherein said ...

METHOD FOR PRODUCING CARBOXYLATED NITRILE RUBBER

A method for producing a carboxyl group-containing nitrile rubber including the steps of: polymerizing a monomer mixture including an α,β-ethylenically unsaturated nitrile monomer and a carboxyl group-containing monomer in a solvent; terminating a polymerization reaction by adding a nitrous acid salt and a water-insoluble hydroquinone as polymerization terminators to the polymerization system, thereby obtaining a dispersion of the carboxyl group-containing nitrile rubber having a pH of 7 or below; and coagulating the dispersion of the carboxyl group-containing nitrile rubber, thereby obtaining the carboxyl group-containing nitrile rubber in the solid state, wherein the amount of the nitrous acid salt to be used is 0.15 parts by weight or less relative to 100 parts by weight of the monomer mixture used in the polymerization reaction. 1. A method for producing a carboxyl group-containing nitrile rubber , comprising the steps of:polymerizing a monomer mixture comprising an α,β-ethylenically unsaturated nitrile monomer and a carboxyl group-containing monomer in a solvent;terminating a polymerization reaction by adding a nitrous acid salt and a water-insoluble hydroquinone as polymerization terminators to the polymerization system when a predetermined polymerization conversion ratio is achieved, thereby obtaining a dispersion of the carboxyl group-containing nitrile rubber having a pH of 7 or below; andcoagulating the dispersion of the carboxyl group-containing nitrile rubber, thereby obtaining the carboxyl group-containing nitrile rubber in the solid state,wherein the amount of the nitrous acid salt to be used is 0.15 parts by weight or less relative to 100 parts by weight of the monomer mixture used in the polymerization reaction.2. The method for producing a carboxyl group-containing nitrile rubber according to claim 1 , wherein the water-insoluble hydroquinone is added in the form of a dispersion in which the water-insoluble hydroquinone is dispersed in water.3. The ...

METHOD FOR PRODUCING PARTICULATE POLYMER

A method for producing a particulate polymer includes polymerizing a monomer having a vinyl group in an aqueous solvent in the presence of a surfactin salt and a polymerization initiator, wherein a concentration of the surfactin salt in a polymerization reaction liquid is adjusted depending on a target particle diameter of the particulate polymer. 2. The method according to claim 1 , wherein the concentration of the surfactin salt in the polymerization reaction liquid is adjusted to 0.0005 mass % or less.3. The method according to claim 1 , wherein a ratio of the surfactin salt to 100 parts by mass of the monomer is adjusted to 20 parts by mass or less.4. The method according to claim 1 , further comprising:separating the produced particulate polymer from a liquid phase;adding a multivalent metal ion to the liquid phase to coagulate the surfactin salt; andseparating the coagulated surfactin salt.5. The method according to claim 4 , further comprising adding an alkali metal ion to the polymerization reaction liquid after the polymerizing and before the separating the produced particulate polymer to coagulate the particulate polymer.6. The method according to claim 2 , further comprising:separating the produced particulate polymer from a liquid phase;adding a multivalent metal ion to the liquid phase to coagulate the surfactin salt; andseparating the coagulated surfactin salt.7. The method according to claim 3 , further comprising:separating the produced particulate polymer from a liquid phase;adding a multivalent metal ion to the liquid phase to coagulate the surfactin salt; andseparating the coagulated surfactin salt.8. The method according to claim 6 , further comprising adding an alkali metal ion to the polymerization reaction liquid after the polymerizing and before the separating the produced particulate polymer to coagulate the particulate polymer.9. The method according to claim 7 , further comprising adding an alkali metal ion to the polymerization reaction ...

MULTISTAGE POLYMER, ITS COMPOSITION, ITS METHOD OF PREPARATION, ITS USE AND COMPOSITION COMPRISING IT

The present invention relates to a multistage polymer, its composition, its process of preparation, and its use as impact modifier in thermoplastic compositions. More particularly the present invention relates a process for manufacturing a multistage polymer, a multistage polymer in thermoplastic compositions, which provides the composition having satisfying thermal stability. 2. The polymer composition according to claim 1 , wherein the composition comprises phosphorous in form of a phosphorous containing compound at least 360_ppm.3. The polymer composition according to claim 1 , wherein the composition comprises phosphorous in form of a phosphorous containing compound of at most 2000_ppm.4. The polymer composition according to wherein the composition comprises phosphorous in form of a phosphorous containing compound between 350 ppm and 2000 ppm of phosphorous that has the oxidation stage of +III or +V.5. The polymer composition according to wherein the phosphorous containing compound is chosen from the group consisting of organophosphorous compound claim 1 , a phosphate salt claim 1 , phosphoric acid claim 1 , phosphonate salts claim 1 , phosphonic acid and their respective esters and mixtures thereof.6. The polymer composition according to wherein the composition comprises no voluntary added multivalent cations chosen from the group consisting of earth alkali metal.7. The polymer composition according to wherein the composition comprises less than 30 ppm of multivalent cations chosen from the group consisting of earth alkali metals.8. The polymer composition according to wherein the composition comprises less than 9_ppm of multivalent cations chosen from the group consisting of earth alkali metals.9. The polymer composition according to wherein the multivalent cation is chosen from the group consisting of Ca2+ and Mg2+.10. The polymer composition according to wherein the multivalent cation present less than 40_ppm of the composition comprising the multistage ...

Process of manufacturing a multistage polymer, its composition, its use and composition comprising it

The present invention relates to a multistage polymer, its composition, its process of preparation, and its use as impact modifier in thermoplastic compositions. More particularly the present invention relates to a process for manufacturing a polymer composition comprising a multistage polymer and its use as impact modifier in thermoplastic compositions.

THERMOPLASTIC MOLDING COMPOSITION AND ARTICLES MADE THEREOF HAVING IMPROVED SURFACE QUALITY

The present invention relates to a process for producing a thermoplastic molding composition and articles made thereof having improved surface quality, in particular improved surface quality after exposure to warm-humid environmental conditions. The thermoplastic molding composition comprises a thermoplastic polymer A, a graft copolymer B obtained by emulsion graft polymerization and optionally a further polymer component P, as well as optional further components/additives K, wherein at least one crystallization additive C, selected from phosphate compounds having 1 to 25 phosphate units, organic acids and salts thereof, is added during or after the preparation of the graft copolymer B. 118-. (canceled)19. A process for the preparation of a thermoplastic molding composition comprising:A: 5 to 95% by weight, based on the total molding composition, at least on thermoplastic polymer A, which comprises at least one vinylaromatic monomer A1 and optionally at least one further ethylenically unsaturated monomer A2; [ B11: 70 to 100% by weight, based on the graft base B1, at least one ethylenically unsaturated monomer B11;', 'B12: 0 to 10% by weight, based on the graft base B1, at least on polyfunctional cross-linking monomer B12, different from B11; and', 'B13 0 to 30% by weight, based on the graft base B1, at least one further copolymerizable monoethylenically unsaturated monomer B13 different from B11 and B12;', 'and optional addition of', 'B14: 0 to 5% by weight, based on the graft base B1, at least one agglomerating component B14,', 'wherein the sum of B11, B12, B13, and B14 is 100% by weight; and, 'B1: 5 to 95% by weight, based on the graft copolymer B, at least one graft base B1, obtained by emulsion polymerization of, B21 50 to 100% by weight, based on the graft shell B2, at least one vinylaromatic monomer B21; and', 'B22 0 to 50% by weight, based on the graft shell B2, at least one ethylenically unsaturated monomer B22,, 'B2: 5 to 95% by weight, based on the graft ...

METHOD FOR MANUFACTURING LIGHTWEIGHT FOAMED RECYCLED LEATHER AND RECYCLED LEATHER PRODUCED BY THE METHOD THEREOF

A method of making a lightweight foamed recycled leather, the method includes pulverizing the collagen fiber waste generated in a controlling a thickness of the leather during a leather process; neutralizing the resultant of step (a) by a soda ash with a water; (c) dyeing and fat-liquoring process treating the resultant of the step (c); (d) mixing a latex, a dispersant, a coagulant, and a thermally expandable microspheres with the resultant of step (c); (e) coagulating a collagen fiber powder and the latex by adding a coagulant into the resultant of step (d); (f) dehydrating and drying the resultant of step (e); and (g) heat treating the resultant of step (f) to foam thermally expandable microspheres, thereby to impart functionality to the recycled leather. 1. A method of making a lightweight foamed recycled leather ,(a) pulverizing the collagen fiber waste generated in a controlling a thickness of the leather during a leather process;(b) neutralizing the resultant of step (a) by a soda ash with a water;(c) dyeing and fat-liquoring process treating the resultant of the step (c);(d) mixing a latex, a dispersant, a coagulant, and a thermally expandable microspheres with the resultant of step (c);(e) coagulating a collagen fiber powder and the latex by adding a coagulant into the resultant of step (d);(f) dehydrating and drying the resultant of step (e);(g) heat treating the resultant of step (f) to foam thermally expandable microspheres, thereby to impart functionality to the recycled leather.2. The method according to claim 1 , wherein the step (d) is processed after mixing 1 to 30% by weight of thermally expandable microspheres based on the total weight and the latex with the resultant of the fat-liquoring process claim 1 ,wherein the (g) process is wherein the step (g) heat-treating the dried product of step (f) at 80 to 130° C. to foam the recycled leather.3. A lightweight foamed recycled leather produced by the produced by the method of .4. A lightweight foamed ...

Method of recovering resinous polymer from latex

Degradable particulate generation and associated methods

Herein provided are methods for producing degradable particulates at a drill site, and methods related to the use of such degradable particulates in subterranean applications. In one embodiment, the present invention provides a method comprising: providing a treatment fluid, the treatment fluid comprising degradable particulates, the degradable particulates having been made by an emulsion method at a drill site; and introducing the treatment fluid into a well bore penetrating a subterranean formation at the drill site.

Olefin polymerization process

Disclosed is a method for reducing fouling in an apparatus and process for separating polyolefin from a slurry in a slurry polymerization reactor system comprising contacting in a reactor at a pressure of at least 2000 kPa a catalyst composition and α-olefin monomers to form a polyolefin reaction mixture; transferring the polyolefin reaction mixture to a high pressure separator, wherein the pressure in the high pressure separator is within the range of from 200 to 2500 kPa; and contacting the polyolefin reaction mixture with an organic amine prior to its entering the high pressure separator.

Process for producing powdery linear polymer having improved powder properties

A powdery linear polymer having a narrow particle size distribution with little dusting and excellent in anti-blocking property is recovered from a latex of a linear polymer containing a large proportion (35 - 75 wt.%) of soft polymer (S) component through a two-step coagulation process including a first (moderate coagulation) step causing 70 - 98 wt.% of the coagulation. The linear polymer in the latex has a multilayer structure comprising a linear polymer (S) having a glass transition temperature below 40°C and a linear polymer (H) having a higher glass transition temperature disposed in totally at least two layers and containing 35 - 75 wt.%, as a whole, of the linear polymer (S) with the proviso that the linear polymer (S) cannot be contained in excess of 30 wt.% in an outermost layer of the multilayer structure.

Aqueous dispersion of low molecular weight polytetrafluoroethylene, low molecular weight polytetrafluoroethylene powder, and method for producing low molecular weight polytetrafluoroethylene

Disclosed is an aqueous dispersion of a low molecular weight polytetrafluoroethylene, which contains an easily removable surfactant, while having good dispersion stability. Specifically disclosed is an aqueous dispersion of a low molecular weight polytetrafluoroethylene [PTFE] containing a tetrafluoroethylene [TFE] unit, or containing a TFE unit and a modified monomer unit copolymerizable with the TFE unit. This aqueous dispersion of a low molecular weight PTFE is characterized in that a fluorine-containing compound represented by the general formula (1) below is contained in an amount of 70-9000 ppm relative to the aqueous dispersion, and the average primary particle diameter of the low molecular weight PTFE is 100-350 nm. X-(CF2)m-Y (1) (In the formula, X represents H or F; m represents an integer of 3-5; and Y represents -SO3M, -SO4M, -SO3R, -SO4R, -COOM, -PO3M2 or -PO4M2 (wherein M represents H, NH4 or an alkali metal, and R represents an alkyl group having 1-12 carbon atoms).)

Perfluoroelastomer gels

Perfluoroelastomeric gel having the following properties: appearance: transparent gelatinous solid; water content between 10% and 90% by weight; density between 1.1 and 2.1 g/cm 3 ; said gel satisfies the following test: dried in a stove at 90°C until a constant weight gives curable perfluoroelastomers.

Acrylic emulsion

The present invention addresses the problem of providing an emulsion having excellent emulsion stability and excellent coagulability (salting-out properties) in manufacturing of an acrylic rubber. The present invention provides an acrylic emulsion containing an acrylic polymer having an average particle diameter of 150-300 nm in a step for emulsion-polymerizing a monomer in manufacturing of an acrylic rubber.

COMPRESSION TYPE DEHYDRATOR

Disclosed is a compression type dehydrator including: an upper plate that includes a pressurizing portion and a first guide adjacent to the pressurizing portion and spaced apart from the pressurizing portion, and performs a vertical movement by a hydraulic cylinder; a feed plate that includes a hollow portion and a first guide groove surrounding the hollow portion and guiding the vertical movement of the first guide, and is positioned on a lower portion of the upper plate; a slurry supply line connected to the feed plate; a lower plate positioned on a lower portion of the feed plate and having a plurality of holes formed therein; and a dehydration means including a filtration belt positioned in close contact with an upper portion of the lower plate. 1. A compression type dehydrator comprising:an upper plate that comprises a pressurizing portion and a first guide adjacent to the pressurizing portion and spaced apart from the pressurizing portion, and performs a vertical movement by a hydraulic cylinder;a feed plate that comprises a hollow portion and a first guide groove surrounding the hollow portion and guiding the vertical movement of the first guide, and is positioned on a lower portion of the upper plate;a slurry supply line connected to the feed plate;a lower plate positioned on a lower portion of the feed plate and having a plurality of holes formed therein; anda dehydration means comprising a filtration belt positioned in close contact with an upper portion of the lower plate.2. The compression type dehydrator of claim 1 , wherein a slurry is disposed in the upper portion of the lower plate and the hollow portion of the feed plate claim 1 , through the slurry supply line claim 1 , andfiltered moisture is introduced into the holes of the lower plate while the disposed slurry is compressed by a downward movement of the upper plate.3. The compression type dehydrator of claim 2 , further comprising a drain pipe connected to the plurality of holes and discharging ...

Method for treating emulsion polymers

Polyolefin/(meth)acrylic composite polymer composition and method of preparing same

A composite polymer composition comprising: the emulsion polymerization product of: (i) an aqueous polyolefin dispersion comprising the melt kneading product of one or more polyolefins, from 0.5 to 25 wt% of one or more dispersion stabilizing agents and water, and (ii) one or more (meth) acrylic monomers; wherein the one or more polyolefins have a Tg equal to or less than 50 °C; wherein the melt kneading product (i) comprises polymer particles having a volume average particle size between 50 nm and 2000 nm dispersed in the water; wherein the one or more dispersion stabilizing agents comprises a fatty acid or fatty acid salt stabilizing agent; and wherein the one or more (meth)acrylic monomers graft onto the polymer particles form composite polymer particles is provide. Also provided is a method of making the composition and impact modifiers comprising the composition.

Method of reducing metal content in fluoroelastomer

A method of producing a fluoroelastomer reduced in the content of metallic ingredients; and a molded article comprising a fluoroelastomer sufficiently reduced in the content of metallic ingredients. The method comprises producing a fluoroelastomer without using a metal oxide through fluoromonomer polymerization, coagulation, and drying, wherein at least one of the starting materials excluding gaseous monomers contains substantially no metallic ingredients. The fluoroelastomer obtained by this method has a metal content of 50 ppm or lower.

从聚合物的乳状液中回收聚合物的方法

本发明提供了一种从聚合物的乳状液中回收聚合物的方法。该方法包括向乳状液中加入第一凝聚剂进行破乳，得到凝聚浆液；在第二凝聚剂的作用下，使凝聚浆液进行熟化，并回收聚合物；第一凝聚剂和第二凝聚剂不同。在不改变物料停留时间的基础上，第二凝聚剂的加入能够促进凝聚浆液中的粒子的碰撞粘连，并改善粒子形态。采用本申请提供的聚合物回收方法，不仅能够明显提高凝聚过程聚合物的分离效率，降低废水中聚合物粉料的含量，改善熟化后乳液聚合物的形态，并有利于下游生产工序的稳定运行。同时还能够提高聚合物产品的收率，降低废水处理费用，在经济方面具有显著效益。

Method for preparation for thermoplastic resin composition, thermoplastic resin composition prepared by the same

본 발명은 a) 방향족 비닐 화합물, 공액디엔계 고무, 및 비닐 시안 화합물을 유화제를 첨가하여 유화중합하여 공중합체 라텍스를 제조하는 단계; 및 b) 상기 공중합체 라텍스에 3가 금속염 및 산을 포함하는 응집제를 투입하여 응집하고 숙성시키는 단계를 포함하며, 상기 응집제는 3가 금속염 및 산을 0.3:1.7 내지 0.6:1.4의 중량비로 포함하고, 상기 응집이 이루어지는 온도는 75℃ 내지 83℃인, 열가소성 수지 조성물의 제조방법 및 이에 따라 제조된 잔류 단량체의 총량이 중량 기준으로 280 ppm인 열가소성 수지 조성물에 관한 것이다. The present invention comprises the steps of: a) preparing a copolymer latex by emulsion polymerization of an aromatic vinyl compound, a conjugated diene-based rubber, and a vinyl cyanide compound by adding an emulsifier; and b) adding a coagulant containing a trivalent metal salt and an acid to the copolymer latex to coagulate and aging, wherein the coagulant contains a trivalent metal salt and an acid in a weight ratio of 0.3:1.7 to 0.6:1.4, , The temperature at which the agglomeration is made is 75 ° C to 83 ° C. The method for producing a thermoplastic resin composition and the total amount of residual monomers prepared accordingly relates to a thermoplastic resin composition of 280 ppm by weight.

由回收的交联聚合物制备热塑性复合材料的方法

本发明涉及由回收的交联聚合物制备热塑性复合材料的方法，提供了制备呈细分散的材料或制品形式的可成形的复合材料或制品的方法，以及由该方法制得的材料和制品，该方法包括通过下列步骤形成混合物：(i)处理水性热塑性丙烯酸或乙烯基聚合物来增大所述聚合物的粒径至重均粒径为1微米或更大；和任选脱水以形成碎屑混合物；和(ii)各热塑性丙烯酸或乙烯基聚合物与一种或多种废橡胶硫化产品进行结合以形成碎屑淤浆，所述废橡胶硫化产品的筛网粒径为10-600微米，用量占所述聚合物和橡胶的总重量的15-95wt％；其中，所述(ii)可以在(i)之前、(i)期间、(i)之后脱水之前、或脱水之后进行；和(iii)热塑加工所述混合物。热塑加工可直接形成制品，例如片材或薄膜。所述可成形的复合材料具有与其它材料的优秀粘合性。在一个实施方式中，所述片材和薄膜可以被形成为层压物。

개선된 표면 특성을 가지는 코어-쉘 그래프트 공중합체

공중합체의 입자의 양 및 지방산 계면활성제의 양을 포함하는 수성 라텍스의 응집에 의해 생성되며, 여기서 응집은 다가 금속 염, 바람직하게는 2가 또는 3가 금속 염의 양의 첨가를 포함하는, 코어-쉘 그래프트 공중합체가 본원에 개시된다. 이러한 공중합체는, 표면 층에서의 겔 함량의 감소에 의해 입증되는 바와 같이, 이러한 공중합체로부터 제조된 성형 용품의 표면 특성의 개선을 제공한다.

Method for producing fluorine-containing elastomer

Method of reducing metal content in fluoroelastomer

불소함유 엘라스토머 제조에서 불소함유 엘라스토머의 금속성분 함유량을 저감화시키는 방법을 제공하고, 또 금속성분 함유량이 충분히 저감된 불소함유 엘라스토머로 이루어진 성형품을 제공하는 것이다. 금속산화물을 사용하지 않은 불소함유 엘라스토머 제조에서 불소함유 단량체의 중합, 응석 (凝析), 건조에 사용되는 가스형의 단량체를 제외한 원재료 중 하나 이상의 원재료를 실질적으로 금속성분을 함유하지 않은 원재료로 하는 불소함유 엘라스토머의 금속함유량 저감화 방법 및 이로써 수득되는 금속함유량이 50 ppm 이하의 불소함유 엘라스토머. The present invention provides a method for reducing the metal component content of a fluorine-containing elastomer in the production of a fluorine-containing elastomer, and to provide a molded article made of a fluorine-containing elastomer having a sufficiently reduced metal component content. In the manufacture of fluorine-containing elastomers that do not use metal oxides, at least one of the raw materials other than gaseous monomers used for polymerization, coagulation, and drying of fluorine-containing monomers is used as a raw material that is substantially free of metal components. A method of reducing the metal content of a fluorine-containing elastomer and a fluorine-containing elastomer having a metal content of 50 ppm or less.

Low molecular weight polytetrafluoroethylene aqueous dispersion, low molecular weight polytetrafluoroethylene powder and method for producing low molecular weight polytetrafluoroethylene

本発明は、除去が容易な界面活性剤を含有し、かつ、分散安定性の良い低分子量ポリテトラフルオロエチレン水性分散液を提供する。本発明は、テトラフルオロエチレン〔ＴＦＥ〕単位、又は、ＴＦＥ単位と上記ＴＦＥ単位と共重合可能な変性モノマー単位とを含む低分子量ポリテトラフルオロエチレン〔ＰＴＦＥ〕の水性分散液であって、下記一般式（１）Ｘ−（ＣＦ２）ｍ−Ｙ （１）（式中、ＸはＨ又はＦを表し、ｍは３〜５の整数を表し、Ｙは−ＳＯ３Ｍ、−ＳＯ４Ｍ、−ＳＯ３Ｒ、−ＳＯ４Ｒ、−ＣＯＯＭ、−ＰＯ３Ｍ２、−ＰＯ４Ｍ２（ＭはＨ、ＮＨ４又はアルカリ金属を表し、Ｒは炭素数１〜１２のアルキル基を表す。）を表す。）で表される含フッ素化合物を水性分散液に対して７０〜９０００ｐｐｍ含有し、低分子量ＰＴＦＥの平均一次粒子径が１００〜３５０ｎｍであることを特徴とする低分子量ＰＴＦＥ水性分散液である。 The present invention provides a low molecular weight polytetrafluoroethylene aqueous dispersion containing a surfactant that can be easily removed and having good dispersion stability. The present invention is an aqueous dispersion of low molecular weight polytetrafluoroethylene [PTFE] containing tetrafluoroethylene [TFE] units, or TFE units and modified monomer units copolymerizable with the TFE units. Formula (1) X- (CF2) mY (1) (wherein X represents H or F, m represents an integer of 3 to 5, Y represents -SO3M, -SO4M, -SO3R, -SO4R) , —COOM, —PO 3 M 2, —PO 4 M 2 (M represents H, NH 4 or an alkali metal, and R represents an alkyl group having 1 to 12 carbon atoms). It is a low molecular weight PTFE aqueous dispersion characterized by containing 70 to 9000 ppm and having an average primary particle diameter of low molecular weight PTFE of 100 to 350 nm.

Method for preparing large particle sized rubber latex, and method for preparing abs graft copolymer

본 기재는 대구경 고무 라텍스의 제조방법 및 ABS계 그라프트 공중합체의 제조방법에 관한 것으로, 보다 상세하게는 평균입경 500 내지 1,500 Å인 공액디엔 고무 라텍스 100 중량부 및 코어-쉘 구조의 고분자 응집제 1 내지 3 중량부를 투입하여 대구경 고무 라텍스를 제조하는 단계를 포함하되, 상기 고분자 응집제는 중량평균분자량이 130,000 내지 200,000 g/mol이고 코어와 쉘의 중량비가 40 내지 60 : 40 내지 60 인 대구경 고무 라텍스의 제조방법 및 ABS계 그라프트 공중합체의 제조방법에 관한 것이다. 본 기재에 따르면, 상기와 같은 방법으로 제조되는 경우 대구경 고무 라텍스의 안정성이 우수하며 응고물 생성이 감소되고 또한 이러한 대구경 고무 라텍스를 포함하는 ABS계 그라프트 공중합체는 충격강도, 유동성 및 물성 밸런스가 우수한 효과가 있다. The present disclosure relates to a method for producing a large-diameter rubber latex and a method for producing an ABS-based graft copolymer, and more particularly, 100 parts by weight of a conjugated diene rubber latex having an average particle diameter of 500 to 1,500 Å, and a core-shell structure polymer coagulant 1 to 3 parts by weight to prepare a large-diameter rubber latex, wherein the polymer coagulant has a weight average molecular weight of 130,000 to 200,000 g/mol and a weight ratio of a core to a shell of 40 to 60: 40 to 60 of a large-diameter rubber latex It relates to a manufacturing method and a manufacturing method of an ABS-based graft copolymer. According to the present disclosure, when manufactured by the above method, the stability of the large-diameter rubber latex is excellent, the formation of coagulation is reduced, and the ABS-based graft copolymer containing the large-diameter rubber latex has impact strength, fluidity and balance of physical properties. It has an excellent effect.

Emulsion styrene-butadiene rubber

본 발명은 용액 스티렌-부타디엔 고무(용액 SBR)로 제조한 타이어 트레드 제형물과 유사하지만 견인 특성이 개선된, 구름 저항(rolling resistance) 및 트레드마모 특성(treadwear characteristics)을 갖는 타이어 트레드 제형물의 제조에 사용될 수 있는 에멀젼 스티렌-부타디엔 고무(SBR)에 관한 것이다. 따라서, 본 발명의 에멀젼 SBR은 종래의 용액 SBR 및 종래의 에멀젼 SBR에 비해 타이어 트레드 복합물에 사용하기에 다양한 측면에서 탁월하다. 본 발명은 보다 특히 열장유동분별법(thermal field flow fractionation)에 따라 측정한 스티렌-부타디엔 고무 조성물의 수평균분자량이 약 50,000 내지 150,000이고 스티렌-부타디엔 고무가 1.8 내지 3.9 범위의 광산란 대 굴절 지수비를 갖는, 스티렌 및 1,3-부타디엔으로부터 유도된 반복 단위로 이루어진 스티렌-부타디엔 고무 조성물에 관한 것이다. 본 발명에 따르는 스티렌 및 1,3-부타디엔으로부터 유도된 반복 단위로 이루어진 스티렌-부타디엔 고무 조성물은 추가로, 스티렌-부타디엔 고무 조성물의 저장 탄성률에 대한 로그 주파수의 플롯이, 스티렌 부타디엔 고무의 동력학적 발진 주파수 쓸기(dynamic oscillation frequency sweep)에서 평행판 입체를 사용하여 120℃에서 수행하는 경우 0.001 내지 100rad/sec 범위의 주파수에서, 스티렌-부타디엔 고무 조성물의 손실 탄성률에 대한 로그 주파수의 플롯과 교차하는 것으로 밝혀졌다. The present invention is directed to the preparation of tire tread formulations having rolling resistance and treadwear characteristics, similar to tire tread formulations made from solution styrene-butadiene rubber (solution SBR) but with improved traction characteristics. It relates to an emulsion styrene-butadiene rubber (SBR) which can be used. Thus, the emulsion SBR of the present invention is superior in various aspects to use in tire tread composites compared to conventional solution SBR and conventional emulsion SBR. The present invention more particularly relates to the light scatter to refractive index ratio of the number average molecular weight of the styrene-butadiene rubber composition measured according to the thermal field flow fractionation and the styrene-butadiene rubber of 1.8 to 3.9. Styrene-butadiene rubber composition consisting of repeating units derived from styrene and 1,3-butadiene. The styrene-butadiene rubber composition consisting of repeating units derived from styrene and 1,3-butadiene according to the present invention further comprises a plot of the logarithmic frequency for the storage modulus of the styrene-butadiene rubber composition, the dynamic oscillation of the ...

manufacturing method of resin powder using synthetic latex

The present invention relates to a preparation method for polymer resin powder using a synthetic rubber latex. More specifically, the present invention relates to a preparation method for polymer resin powder using a synthetic rubber latex, in which butadiene acrylonitrile synthetic rubber latex is dispersed using an inorganic dispersant, and subsequently subjected to liquid coagulation in a high solid concentration to produce polymer resin powder with excellent particle distribution, excellent powder flowability, and high apparent volume. The preparation method for polymer resin powder using a synthetic rubber latex comprises: a dispersion step in which 20-60 parts by weight of an inorganic dispersant with respect to 100 parts by weight of a latex polymerization liquid are introduced into a reservoir, and stirred; a coagulation step in which 20-80 parts by weight of a coagulant and 5-10 parts by weight of an organic dispersant with respect to 100 parts by weight of a latex polymerization liquid discharged from the reservoir are introduced into a coagulation tank, and stirred to be coagulated; an aging step in which latex slurry discharged from the coagulation tank is introduced into an aging tank, and aged; a dehydration step in which the latex slurry discharged from the aging tank is dehydrated to reduce water content; and a drying step in which polymer particles obtained in the dehydration step are dried.

Method for treating emulsion polymers

A) 염화나트륨, 염화칼슘, 염화마그네슘, 염화알루미늄, 황산나트륨, 황산마그네슘, 황산알루미늄 또는 이들의 혼합물로부터 선택된 하나 이상의 염 수용액, B) 차아인산 (H 3 PO 2 ), 아인산 (H 3 PO 3 ) 또는 아스코르브산의 염 또는 이들의 혼합물로부터 선택된 하나 이상의 염 수용액, 및 임의적으로, C) 황산, 인산 또는 아세트산으로부터 선택된 묽은 산 수용액 A) one or more aqueous salt solutions selected from sodium chloride, calcium chloride, magnesium chloride, aluminum chloride, sodium sulfate, magnesium sulfate, aluminum sulfate or mixtures thereof, B) hypophosphorous acid (H 3 PO 2 ), phosphorous acid (H 3 PO 3 ) or ascorbic Aqueous solution of one or more salts selected from salts of acids or mixtures thereof, and optionally, dilute acid aqueous solution selected from C) sulfuric acid, phosphoric acid or acetic acid 의 조합을 사용하여 수행함을 특징으로 하는, 에멀션 중합에 의해 제조된 중합체 성분의 후처리 방법. A process for the post-treatment of a polymer component produced by emulsion polymerization, characterized in that it is carried out using a combination of. 에멀션 중합체, 라텍스 응고제 Emulsion polymer, latex coagulant

Composition comprising functionalized rubber and graphene, processes and applications thereof

The present disclosure generally relates to the field of tyre technology and pertains to compositions employed for manufacturing tyre treads. More particularly, the present disclosure provides a composition comprising functionalized styrene butadiene polymer (SBR) and graphene as a reinforcing filler, and processes for preparation and applications thereof. The reinforcement of functionalized SBR with graphene filler shows homogeneous dispersion of graphene via chemical bonding with functionalized SBR, reduces particle- particle interactions of graphene filler, reduces filler-filler interaction and hence increases in filler-graphene interaction which shows the improvement in properties such as wet grip, rolling resistance, modulus, hardness and tensile properties, rheological properties etc. A tyre tread made of the present composition is superior to a tyre tread manufactured using a composition comprising traditional fillers, such as carbon black.

Emulsion-produced styrene-butadiene rubber

Emulsion styrene-butadiene rubber

This invention discloses an emulsion styrene-butadiene rubber (SBR) that can be employed in manufacturing tire tread formulations that have rolling resistance and treadwear characteristics that are similar to those made with solution SBR but with improved traction characteristics. Thus, the emulsion SBR of this invention is superior in many respects for use in tire tread compounds to conventional solution SBR and conventional emulsion SBR. This invention more specifically discloses a styrene-butadiene rubber composition which is comprised of repeat units which are derived from styrene and 1,3-butadiene, wherein the styrene-butadiene rubber composition has a number average molecular weight as determined by thermal field flow fractionation which is within the range of about 50,000 to 150,000, and wherein the styrene-butadiene rubber has a light scattering to refractive index ratio which is within the range of 1.8 to 3.9. The subject invention further reveals a styrene-butadiene rubber composition which is comprised of repeat units which are derived from styrene and 1,3-butadiene, wherein a plot of log frequency versus storage modulus of the styrene-butadiene rubber composition crosses over a plot of log frequency versus loss modulus of the styrene-butadiene rubber composition at a log frequency within the range of 0.001 radians per second to 100 radians per second when conducted at 120°C using parallel plate geometry in the dynamic oscillation frequency sweep of the styrene-butadiene rubber.

乳液丁苯橡胶

本发明公开了一种可用于生产轮胎胎面配料的乳液丁苯橡胶(SBR),该配料具有改进的引力性能。本发明还公开了一种丁苯橡胶组合物,它含有来自苯乙烯和1,3－丁二烯的重复单元,该组合物的数均分子量为约50,000～150,000且丁苯橡胶的光散射与折射指数的比为1.8～3.9。本发明还公开了一种丁苯橡胶组合物,其中在120℃下,在该丁苯橡胶的动态振动频率扫描中使用几何平行板时,丁苯橡胶的log频率对储能模量的曲线与log频率对损失模量的曲线相交,相交点的频率范围为0.001—100弧度/秒。

Emulsion styrene-butadiene rubber

This invention discloses an emulsion styrene-butadiene rubber (SBR) that can be employed in manufacturing tire tread formulations that have rolling resistance and treadwear characteristics that are similar to those made with solution SBR but with improved traction characteristics. Thus, the emulsion SBR of this invention is superior in many respects for use in tire tread compounds to conventional solution SBR and conventional emulsion SBR. This invention more specifically discloses a styrene-butadiene rubber composition which is comprised of repeat units which are derived from styrene and 1,3-butadiene, wherein the styrene-butadiene rubber composition has a number average molecular weight as determined by thermal field flow fractionation which is within the range of about 50,000 to 150,000, and wherein the styrene-butadiene rubber has a light scattering to refractive index ratio which is within the range of 1.8 to 3.9. The subject invention further reveals a styrene-butadiene rubber composition which is comprised of repeat units which are derived from styrene and 1,3-butadiene, wherein a plot of log frequency versus storage modulus of the styrene-butadiene rubber composition crosses over a plot of log frequency versus loss modulus of the styrene-butadiene rubber composition at a log frequency within the range of 0.001 radians per second to 100 radians per second when conducted at 120° C. using parallel plate geometry in the dynamic oscillation frequency sweep of the styrene-butadiene rubber.

Method For Preparing Graft Copolymer, Graft Copolymer Having Improved Impact Resistance Prepared Therefrom, And Thermoplastic Resin Composition Comprising Thereof

본 발명은 디엔계 중합체에 평균입경 1200Å 이상의 고분자 응집제를 투입하고 응집하는 단계; 및 응집된 공액디엔계 중합체, 방향족 비닐계 단량체 및 비닐시안계 단량체를 유화 중합하는 단계를 포함하는 그래프트 공중합체의 제조 방법, 이로부터 제조된 내충격성이 우수한 그래프트 공중합체 및 이를 포함하는 열가소성 수지 조성물을 제공한다. The present invention comprises the steps of adding a polymer coagulant having an average particle diameter of 1200 Å or more to a diene-based polymer and agglomeration; And a method for preparing a graft copolymer comprising emulsion polymerization of the aggregated conjugated diene-based polymer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer, a graft copolymer having excellent impact resistance prepared therefrom, and a thermoplastic resin composition comprising the same provides

Process to minimize yellowness in articles formed from acrylonitrile-styrene compositions

The development of yellowness in an article formed from an acrylonitrile-styrene (or styrene derivative) polymer composition is minimized by 1. COAGULATION OF THE POLYMER IN A PH environment of 6.0 to 7.5; and 2. MELT PROCESSING OF THE POLYMER COMPOSITION (AT A TEMPERATURE OF 200*C. to 260*C.) with moisture controlled in the composition either A. IN AN INITIAL RANGE OF 0.2 TO 1.5 WEIGHT PERCENT AND A FINAL RANGE OF 0.15 TO 0.4 WEIGHT PERCENT IMMEDIATELY PRIOR TO SOLIDIFICATION IN EQUIPMENT THAT PROVIDES EXTRACTION OF VOLATILES DURING PROCESSING, OR B. IN THE RANGE OF 0.15 TO 0.4 WEIGHT PERCENT IN EQUIPMENT THAT DOES NOT PROVIDE EXTRACTION OF VOLATILES. The formed article which is essentially free of bubbles is useful where barrier properties to oxygen or carbon dioxide are desirable, e.g., bottles for holding carbonated beverages.

乳液聚合物的后处理方法

本发明涉及处理通过乳液聚合制备的聚合物组分的方法。本发明方法的特征在于在乳液聚合后存在的水性聚合物胶乳的凝固结合使用以下组分来进行：A)选自氯化钠，氯化钙，氯化镁，氯化铝，硫酸钠，硫酸镁，硫酸铝或它们的混合物中盐的至少一种水溶液，B)次磷酸(H 3 PO 2 )，亚磷酸(H 3 PO 3 或HPO 2 )或抗坏血酸的盐或它们的混合物的至少一种水溶液和任选的C)选自硫酸，磷酸或乙酸中的含水稀酸。

Method for producing emulsion polymer

PROCESS FOR THE CONTINUOUS COAGULATION OF AQUEOUS DISPERSIONS OF GRAFT RUBBER, APPARATUS FOR THE SAME AND USE OF THE LAST

Un porceso para la coagulacion continua de dispersiones acuosas de cauchos de injerto apropiados para endurecer termoplásticos. En el proceso se deplazanlas dispersiones a través de un aparato que contiene por lo menos un elemento proveedor de esfuerzo de corte con un estator ranurado y la rotacion del rotordentro del estator, de modo tal que dichas dispersiones pasan radialemnte desde el interior al exterior como resultado de la rotacion del rotor dentro delelemento proveedor del esfuerzo decorte y se someten a un cizallamiento suficientemente fuerte como para coagularse, lo que produce coágulos de cauchode injerto que pueden elaborarse con facilidad aun con un contenido de solidos del 50% en peso de los elastomeros. A process for the continuous coagulation of aqueous dispersions of graft rubbers suitable for thermoplastic hardening. In the process dispersions are displaced through an apparatus containing at least one shear stress supplying element with a slotted stator and rotor rotation within the stator, such that such dispersions pass radiantly from inside to outside as a result Rotation of the rotor within the shear stress-providing element is subjected to shear strong enough to coagulate, resulting in graft rubber clots that can be easily processed even with a solids content of 50% by weight of elastomers.

Method for dehydrating a two-phase liquid mixture comprising a thermoplastic melt and an aqueous phase

Process for recovering graft copolymer latex solids

In-line coagulation process for fluoroelastomer emulsions

In-line continuous coagulation and agglomeration of fluoroelastomers produced by emulsion polymerization permits direct processing of fluoroelastomer latex into mechanical dewatering devices. Coagulant is injected into the fluoroelastomer latex countercurrent and under high pressure atomization and residence time prior to mechanical dewatering is controlled.

Process for working up emulsion polymers

A process for working up polymer components prepared by emulsion polymerization is disclosed. The process is characterized in that coagulation of the aqueous polymer latex present after emulsion polymerization is performed using a combination of A) an aqueous solution of at least one salt selected from the group consisting of sodium chloride, calcium chloride, magnesium chloride, aluminum chloride, sodium sulfate, magnesium sulfate and aluminum sulfate, B) an aqueous solution of at least one salt of an acid selected from the group consisting of hypophosphorous acid (H 3 PO 2 ), phosphorous acid (H 3 PO 3 or HPO 2 ) and ascorbic acid and optionally C) an aqueous dilute acid selected from the group consisting of sulfuric acid, phosphoric acid and acetic acid.

Method for preparing vinylcyan compound-conjugated diene compound-aromatic vinyl compound graft copolymer and thermoplastic resin composition containing the same

본 기재는 그라프트 공중합체 및 이 그라프트 공중합체를 포함하는 열가소성 수지 조성물의 제조방법에 관한 것으로, 보다 상세하게는 공액디엔 고무 라텍스에 방향족 비닐 화합물 및 비닐시안 화합물을 그라프트 중합시킨 그라프트 공중합체 라텍스 100 중량부(고형분 기준)에 대하여 산 응집제를 투입하여 응집한 후 다시 염 응집제를 투입하여 응집시키는 단계를 포함하는 그라프트 공중합체의 제조방법에 관한 것이다. 본 기재에 따르면, 상기와 같은 방법으로 제조되는 경우 응집효율이 우수하면서 광택도가 높고 헌터랩 칼라미터를 사용하여 측정한 b값 및 250℃에서 15분간 체류 후 측정한 b값아 낮아 색상이 우수하고 가열감량이 낮고 스코치 타임이 길어서 가공특성이 우수한 효과가 있다. The present disclosure relates to a graft copolymer and a method for producing a thermoplastic resin composition comprising the graft copolymer, and more particularly, to a graft copolymer obtained by graft polymerization of an aromatic vinyl compound and a vinyl cyanide compound to a conjugated diene rubber latex. It relates to a method for producing a graft copolymer comprising the step of agglomeration by adding an acid coagulant to 100 parts by weight of the coalescing latex (based on solid content) and then adding a salt coagulant again to coagulate. According to the present description, when manufactured by the above method, the cohesive efficiency is excellent, the gloss is high, and the b value measured using a Hunter Lab color meter and the b value measured after staying at 250° C. for 15 minutes are low, and the color is excellent. It has a low heating loss and a long scorch time, resulting in excellent processing characteristics.

그라프트 중합체의 제조방법

본 발명은 카르복시산 단량체 및 메틸 아크릴레이트를 포함하되, 상기 카르복시산 단량체를 1.5 내지 2.5 중량%로 포함하는 단량체 혼합물을 중합하여 평균입경이 60 내지 70 ㎚인 아크릴계 응집제를 제조하는 단계; 상기 화학식 1로 표시되는 화합물의 염을 포함하는 유화제의 존재 하에, 디엔계 단량체를 중합하여 제1 디엔계 고무질 중합체를 제조하는 단계; 상기 제1 디엔계 고무질 중합체를 상기 아크릴계 응집제로 비대화하여 제2 디엔계 고무질 중합체를 제조하는 단계; 및 상기 제2 디엔계 고무질 중합체에 방향족 비닐계 단량체 및 시안화 비닐계 단량체를 그라프트 중합하여 그라프트 중합체를 제조하는 단계를 포함하는 그라프트 중합체의 제조방법에 관한 것이다.

Method for preparing nitrile based rubber

본 발명에서는 공액디엔계 단량체에 대해 에틸렌성 불포화 니트릴계 단량체를 2회 이상 분할 투입하여 중합반응시켜 중합체를 준비하는 단계 및 상기 중합체에 유황계 응고제를 첨가하여 중합체를 응고시키는 단계를 포함하는, 에틸렌성 불포화 니트릴의 함량이 34중량% 이하인 니트릴계 고무의 제조방법 및 이에 따라 제조되어 우수한 가공성 및 저온 특성과 함께 개선된 기계적 물성을 갖는 니트릴계 고무를 제공한다. In the present invention, there is provided a process for preparing a polymer, comprising the steps of preparing a polymer by subjecting a conjugated diene monomer to an addition polymerization of an ethylenically unsaturated nitrile monomer two or more times, and adding a sulfur type coagulant to the polymer to solidify the polymer. A nitrile rubber having an unsaturated nitrile content of 34% by weight or less, and a nitrile rubber having excellent processability and low temperature characteristics and improved mechanical properties.

Thermoplastic Resin Composition And Molded Article Comprising The Same

A thermoplastic resin composition comprising a polylactic acid polymer (A), an acrylic polymer (B) containing units of methyl methacrylate monomer, and a graft copolymer (C) obtained by graft-polymerizing a vinyl monomer onto a rubbery polymer, wherein the refractive index, Rc, of the graft copolymer (C) and the total refractive index, Rab, of the polylactic acid polymer (A) and the acrylic polymer (B) satisfy the following formula (1). −0.004≦− Rc−Rab ≦+0.008   (1)

Thermoplastic resin composition and molded article comprising the same

A thermoplastic resin composition comprising a polylactic acid polymer (A), an acrylic polymer (B) containing units of methyl methacrylate monomer, and a graft copolymer (C) obtained by graft-polymerizing a vinyl monomer onto a rubbery polymer, wherein the refractive index, Rc, of the graft copolymer (C) and the total refractive index, Rab, of the polylactic acid polymer (A) and the acrylic polymer (B) satisfy the following formula (1) −0.004≦ Rc−Rab ≦+0.008  (1).

그래프트 공중합체의 제조 방법, 이로부터 제조된 내충격성이 우수한 그래프트 공중합체 및 이를 포함하는 열가소성 수지 조성물

본 발명은 디엔계 중합체에 평균입경 1200Å 이상의 고분자 응집제를 투입하고 응집하는 단계; 및 응집된 공액디엔계 중합체, 방향족 비닐계 단량체 및 비닐시안계 단량체를 유화 중합하는 단계를 포함하는 그래프트 공중합체의 제조 방법, 이로부터 제조된 내충격성이 우수한 그래프트 공중합체 및 이를 포함하는 열가소성 수지 조성물을 제공한다.

Thermoplastic resin composition and molded article comprising the same

본 발명의 요지는 폴리락트산계 중합체(A), 메틸 메타크릴레이트 단량체 단위를 함유하는 아크릴계 중합체(B), 및 고무질 중합체에 바이닐계 단량체를 그래프트 중합하여 수득된 그래프트 공중합체(C)를 함유하고 있고, 그래프트 공중합체(C)의 굴절률 Rc 및 폴리락트산계 중합체(A)와 아크릴계 중합체(B)의 합계 굴절률 Rab가 이하의 수학식 1을 만족하는 열가소성 수지 조성물에 있다. 수학식 1

Method for preparing Polyvinyl Chloride paste resin composition

본 발명은 염화비닐계 페이스트 수지 조성물의 제조방법에 관한 것이다. 보다 구체적으로, 분말 상태가 아닌 에멀젼 상태의 염화비닐 페이스트 수지 라텍스와 NBR 라텍스를 블렌딩 함으로써, 분말을 이용한 제품보다 우수한 기계적 물성과 더불어 내후성, 내오존성, 난연성, brabender Torque Value 감소 및 표면광택성 증가 등의 효과가 있는 염화비닐계 페이스트 수지 조성물의 제조방법이 제공된다.

Process for producing a resin for controlling brightness

내용 없음.

Method for preparing graft copolymer complex, graft copolymer complex and thermoplastic resin composition comprising the graft copolymer complex

본 발명은 공액 디엔계 중합체, 방향족 비닐계 단량체 및 알킬 (메트)아크릴레이트계 단량체를 유화 중합하여 그래프트 공중합체 라텍스를 제조하는 단계; 및 상기 그래프트 공중합체 라텍스에 이미다졸계 이온성 화합물을 투입하고 응집하는 단계를 포함하는 그래프트 공중합체 복합체의 제조방법, 공중합체 복합체 및 이를 포함하는 열가소성 수지 조성물에 관한 것이다. The present invention comprises the steps of preparing a graft copolymer latex by emulsion polymerization of a conjugated diene-based polymer, an aromatic vinyl-based monomer, and an alkyl (meth)acrylate-based monomer; And it relates to a method for producing a graft copolymer composite, a copolymer composite, and a thermoplastic resin composition comprising the same, comprising the step of adding and agglomerating an imidazole-based ionic compound into the graft copolymer latex.

Preparing method of non-yellowing and high retractive bead

본 발명은 무황변 고굴절 비드의 제조방법에 관한 것으로, 특히 a) ⅰ)아크릴레이트계 단량체, ⅱ)스티렌계 단량체, ⅲ)안정제 및 ⅳ)개시제를 ⅴ)용매에 녹여 중합반응시켜 비드를 제조하는 단계; b) 상기 a)단계에서 중합된 비드를 세척하는 단계; 및 c) 상기 세척된 비드를 비드의 유리 전이온도보다 낮은 온도에서 건조하는 단계를 포함하는 것을 특징으로 하는 무황변 고굴절 비드의 제조방법 및 상기 방법에 의하여 제조된 무황변 고굴절 비드에 관한 것이다. 본 발명의 무황변 고굴절 비드의 제조방법은 1.5 이상의 높은 굴절률을 가지면서도 황변현상이 나타나지 않는 유기 폴리머 비드의 제조를 가능하게 하며, 본 발명에 따라 제조된 무황변 고굴절 비드는 광확산 필름 등 디스플레이 분야에 적용하기에 특히 적합하다.

Continuous coagulation process of polytetrafluoroethylene or modified polytetrafluoroethylene finely divided powder, polytetrafluoroethylene or modified polytetrafluoroethylene finely divided powders prepared by this method

FIELD: polymers, chemical technology. SUBSTANCE: invention relates to the continuous method for preparing polytetrafluoroethylene (PTFE) or modified PTFE finely divided powders. The continuous method for preparing PTFE or modified PTFE finely divided powders involves the following steps: (a1) dilution of PTFE-latex of modified PTFE-latex prepared in polymerization in the dispersion-emulsion to the concentration from 5 to 25 wt.-% of PTFE or modified PTFE with possible filtration of the prepared diluted latex; (b1) molding latex with inert gas to the relative pressure with respect to atmosphere pressure in the range 3-40 kg/cm 2 (0.3-4 MPa); (c1) addition of acid electrolyte solution to latex in the line-flow mixer at pH value 1-4; (d1) feeding the latex flow from the mixer through capillary tube under condition of turbulent current with the Reynolds number above 3000; (e1) gel prepared at step (d1) is coagulated onto granules at mechanical stirring with the specific power 1.5-10 kWt/m 3 and stirring is maintained up to flotation of finely divided powder; (f1) below water is separated from the finely divided powder. PTFE of modified PTFE finely divided powders that can't be processed by thermal method prepared by abovementioned method show the following indices: apparent density is ≥ 470 g/l; average diameter of particles (D 50 ) is above 200 mcm; distribution of particles by diameter determined as ratio between particles mass with diameter from 0.7 to 1.3 times with respect to average particles diameter and the total particles mass above 50%. Invention provides preparing powders without using the complex and expensive equipment, and powders possess the improved fluidity and show the apparent density and narrow distribution of particles by the diameter index. EFFECT: improved preparing method. 9 cl, 1 tbl, 1 dwg, 6 ex ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 283 321 (13) C2 (51) ÌÏÊ C08J 3/16 (2006.01) C08F 6/22 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ...

Prepare method, graft copolymer compound and the thermoplastic resin composition comprising it of graft copolymer compound

本发明涉及制备接枝共聚物复合物的方法、通过该方法制备的共聚物复合物、和包含该共聚物复合物的热塑性树脂组合物，其中该方法包括乳液聚合共轭二烯类聚合物、芳族乙烯基类单体和(甲基)丙烯酸烷基酯类单体以制备接枝共聚物胶乳；并向该接枝共聚物胶乳中添加咪唑类离子化合物并使其凝固。

Polymer manufacturing method and manufacturing equipment

Stabilisation of fluoropolymers

A method for the stabilisation and isolation of a fluoropolymer bearing carboxylic acid (-C0 2 H) groups and prepared as an aqueous dispersion using a dispersion polymerisation process which employs a dispersing agent whose dispersion-stabilising effect is removable by heating the dispersion and an initiator (or initiator system) which yields carboxylic acid groups on the fluoropolymer, which method comprises, after preparing an aqueous dispersion of the fluoropolymer using dispersion polymerisation, converting the carboxylic acid groups on the fluoropolymer in the aqueous dispersion to carboxylate anion groups (-C0 2 -) using a base and then heating the so-modified fluoropolymer dispersion to cause simultaneously: 1) substantial removal of carboxylate anion groups, thereby to yield stable groups in their place, and 2) isolation of the fluoropolymer from the dispersion by coagulation (agglomeration) of the fluoropolymer dispersion.

Copolymeric resin binder powders

Powders of physiologically-tolerable copolymers of vinyl and vinylidene monomers, said copolymers being useful as fast-dissolving resin binders for the preparation of pharmaceutical coatings, having a residual monomer content of less than 0.05 percent by weight, and having a primary particle size less than one micron; a method of preparing such powders by spray drying an aqueous dispersion of a copolymer under non-sintering temperature conditions; a method for preparing solutions for coating orally-ingestible dosage unit forms with said copolymers; and such dosage unit forms coated with said copolymers.

A kind of cohesion washing methods of fluorine resin F2314

本发明涉及一种一种含氟树脂F2314乳液的凝聚洗涤方法，其特征在于，包括如下步骤：1)用去离子水调节氟树脂F2314的乳液的比重为1.05～1.12，得稀乳液；2)将所述稀乳液在温度为‑15～‑5℃的条件下凝聚5～8h；3)将所述凝聚处理后的乳液在温度为30～70℃的条件下解冻10～15h，析出氟树脂F2314粗品；4)用去离子水对所述氟树脂F2314粗品进行洗涤，得含氟树脂F2314。本发明所述的方法仅通过对乳液聚合的氟树脂F2314乳液的冷冻凝聚，即可实现对氟树脂F2314的成功破乳，得到的粉末状的氟树脂F2314，增加了物料与洗涤水的接触面积，用较少的洗涤次数和用水量就能得到合格的产物。

Easy-to-process opaque and high-strength methyl methacrylate-butadiene-styrene polymer for polyvinyl chloride and its preparation method

FIELD: chemistry.SUBSTANCE: present invention relates to the field of technology for the production of additives for polyvinyl chloride (PVC), in particular to an easy-to-process opaque and high-strength methyl methacrylate-butadiene-styrene (MBS) polymer for PVC and a method for its production. An easy-to-process opaque and high-strength methyl methacrylate-butadiene-styrene (MBS) polymer for polyvinyl chloride (PVC) is described, having a core-inner layer-shell structure (three-layer structure), where MBS includes the following components by weight: 1-20% core, 70-85% inner layer and 5-20% shell; the core is a copolymer of a styrene (ST) monomer and an acrylate monomer; the ratio of the ST monomer to the acrylate monomer is from 95:5 to 5:95; the ST monomer includes ST or methyl styrene; the acrylate monomer includes one or more of the following acrylates: methylacrylate, ethylacrylate, butylacrylate, and 2-ethylhexylacrylate; the inner layer is a low-temperature glass transition butadiene (BD)-ST polymer, and the ratio of BD to ST is from 100:0 to 80:20; the shell is a copolymer of ST, butylacrylate and methyl methacrylate (MMA) with a high glass transition temperature; the content of ST, butylacrylate and MMA is 0.2-5%, 0.2-2% and 13-20% by weight, respectively. A method for obtaining an easy-to-process opaque and high-strength MBS for PVC is also proposed.EFFECT: technical result is improved impact resistance of the three-layer structure in comparison with the existing core-shell structure.10 cl, 1 tbl, 15 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C08F 212/08 (2006.01) C08F 257/02 (2006.01) C08F 220/14 (2006.01) C08F 220/18 (2006.01) C08F 285/00 (2006.01) C08F 236/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА C08K 5/57 (2006.01) ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ C08K 5/098 (2006.01) C08K 3/26 (2006.01) C08K 3/22 (2006.01) (12) (13) 2 750 936 C1 C08K 13/02 (2006.01) C08L 51/04 (2006.01) C08L 27/06 (2006.01) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C08F 212/08 (2021.01); ...

Method for reducing the polymer content of effluent during the drainage of polymer/water mixtures

본 발명은 열가소성 중합체 용융물과 수성상으로 이루어진 2상 액체 혼합물을 탈수시키는 동안 유출되는 폐수 중의 중합체 함량을 감소시키기 위한 방법에 관한 것이다. 상기 방법에 따라, 중합체 용융물은 응고되고, 물은 압출기 관에서 용융물 케이크로부터 배출시킨다. 상기 방법은 2상 액체 혼합물을 압출기 관으로 공급한 직후에 280℃ 이상의 온도로 과열된 수증기를 도입함을 특징으로 한다. The present invention relates to a method for reducing the polymer content in effluents flowing out during dehydration of a two-phase liquid mixture consisting of a thermoplastic polymer melt and an aqueous phase. According to the method, the polymer melt is solidified and water is withdrawn from the melt cake in an extruder tube. The method is characterized by introducing superheated steam to a temperature of at least 280 ° C. immediately after feeding the biphasic liquid mixture into the extruder tube. 열가소성 중합체, 수성상, 용융물 케이크, 과열된 수증기, 2상 액체 혼합물. Thermoplastic polymer, aqueous phase, melt cake, superheated steam, two-phase liquid mixture.

Acryl multilayer polymer powder and its manufacturing method

본 발명은 아크릴 다층 고분자의 유화 라텍스를 응고한 분말을 함유하는 아크릴 다층 고분자 분말에 관한 것으로, 아크릴 다층 고분자는 압력탈수 압출기등을 사용하는 건조방법에 적합하며 건조 후 212μm 이하의 입자 크기를 갖는 미세입자가 40wt%를 초과하지 않고 건조 후 수은 압력법으로 측정시 5μm이하의 세공크기를 갖는 틈의 부피가 단위중량당 0.7cc를 초과하지 않는 것으로 필요로 하는 단랑체를 유화중합하여 아크릴 다층 고분자의 유화 라텍스를 얻고 이를 응고용 응고용액에 주입하여 제조한다. The present invention relates to an acrylic multilayer polymer powder containing a powder solidified emulsified latex of the acrylic multilayer polymer, the acrylic multilayer polymer is suitable for a drying method using a pressure dewatering extruder and the like and has a fine particle size of 212 μm or less after drying The volume of the gap having a pore size of 5 μm or less as measured by the mercury pressure method after drying does not exceed 40 wt%, and the emulsion is polymerized to form a monolayer which requires the emulsion. It is prepared by obtaining an emulsion latex and injecting it into a coagulation solution for coagulation.

Diene based rubber latex, preparation method thereof and core-shell structured graft copolymer comprising the same

본 발명은 고분자 응집체를 포함하는 초대구경의 디엔계 고무 라텍스, 이의제조방법 및 이를 포함하는 충격강도 및 표면특성이 우수한 코어-쉘 구조의 그라프트 공중합체에 관한 것으로, 불포화 카르복실산 또는 이의 에스테르 단량체 유래 단위 및 관능기를 갖는 공단량체 유래 단위를 포함하고, 평균입경이 230 nm 내지 300 nm인 고분자 응집체에 의해 비대화된, 평균입경이 600 nm 내지 800 nm인 디엔계 고무 라텍스를 제공한다.

Manufacture of alpha methylstyrene

Method for preparing graft copolymer, graft copolymer and resin composition comprising the copolymer

본 발명은 그라프트 공중합체 제조방법에 관한 것으로, 고무질 중합체를 포함하는 고무질 중합체 라텍스에, 고분자 응집제를 포함하는 고분자 응집제 라텍스를 투입하고 응집시켜, 비대화된 고무질 중합체를 포함하는 비대화 고무질 중합체 라텍스를 제조하는 단계(S10); 및 상기 (S10) 단계에서 제조된 비대화 고무질 중합체 라텍스에, 방향족 비닐계 단량체 및 비닐시안계 단량체를 투입하고 그라프트 중합하여 그라프트 공중합체를 포함하는 그라프트 공중합체 라텍스를 제조하는 단계(S20)를 포함하고, 상기 고분자 응집제는 중량평균 분자량이 550,000 g/mol 내지 750,000 g/mol인 산기 함유 공중합체를 포함하며, 상기 (S20) 단계에서 투입되는 비닐시안계 단량체의 함량은 방향족 비닐계 단량체 및 비닐시안계 단량체 전체 함량에 대하여 15 중량% 내지 24 중량%인 그라프트 공중합체 제조방법, 이로부터 제조된 그라프트 공중합체 및 이를 포함하는 수지 조성물에 관한 것이다.

Fluoropolymers

Curable fluoroelastomer compositions having improved compression set after curing are provided, as well as compositions that are of relatively high purity. These compositions include a hydrogen-containing fluoroelastomer having interpolymerized units derived from a cure-site monomer, a curative (optionally with a co-agent), and an organo-onium. When the fluoroelastomer contains units derived from vinylidene fluoride, the composition is essentially free from an inorganic acid acceptor. Methods of improving the compression of cured fluoroelastomer and cured fluoroelastomers having improved compression set are also provided.

Ultra-clean fluoropolymers

High purity fluoropolymers are obtained by the emulsion polymerization process, removing essentially all ions and coagulating the polymer essentially without adding ions. These polymers are useful in the field of electronic devices.

Fluoropolymer coagulation method and composition

本发明提供了一种生产全卤化弹性体的方法，该方法包括采用鎓类化合物来凝聚含有聚合物胶粒的胶乳的步骤，所述聚合物胶粒基本上由一种或多种全卤化共聚单体和至少一种硫化点单体的共聚单元构成，其中所述的凝聚步骤基本上在没有金属离子和金属盐的条件下进行。本发明还提供了一种弹性体组合物，该弹性体组合物包含可硫化的全卤化弹性体，所述弹性体含有衍生自含氮硫化点单体的共聚单元，并且所述弹性体是采用鎓类化合物凝聚的，其中所述的弹性体不用再添加其它组分就能进行硫化，并且其中所述的组合物基本上不含金属离子和金属盐。本发明还提供了含氟聚合物制品以及制备含氟聚合物组合物及其制品的方法。