Closed-Loop Recycled Polyurethane Foam, Methods Of Manufacture and Products Therefrom

The present disclosure relates to the production of molded products containing recycled content, and more particularly polyurethane foam which includes polyol recovered from chemical recycling of polyurethane foam scrap, which polyol has been treated to optimize viscosity and/or reactivity characteristics.

Two component polyurethane adhesives

The invention relates to mixtures with a long shelf life containing relatively high-molecular-weight polyhydroxyl compounds and short-chain polyols, to their use for the preparation of polyurethanes, and to their use in two-component polyurethane adhesives.

ポリエチレン微多孔膜の製造方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Water absorbent powder and process for the production thereof

A manufacturing method of water-absorbent agent powders of the present invention is a method of reducing an amount of a residue of an epoxy crosslinking agent remaining therein by adding a nucleophilic reagent in a form of powder to surface region crosslinked water-absorbent resin powders having a carboxyl group under an applied heat in which the residue of the crosslinking agent remains. Since the method permits an amount of the residue of the crosslinking agent to be reduced by adding a nucleophilic reagent to the heated water-absorbent resin powders, the water-absorbent agent powders exhibiting well-balanced properties which are mutually negatively correlated from one another, i.e., high absorbency under pressure, a reduced amount of a residue of the epoxy crosslinking agent and a high absorbing rate compared with the conventional surface region crosslinked water-absorbent resin powders can be achieved. Such water-absorbent agent powders are suitably used in sanitary materials such as disposable diaper, sanitary napkin, etc.

Sinterable semi-crystalline powder and article formed therewith

A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 νm, provided further that the number average ratio of particles smaller than 53 νm is greater than 80 %, the remaining larger particles being in the size range from 53 νm to 180 νm. A powder with slow recrystallization rates, as evidenced by non-overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10 °C to 20 °C per minute, will also result in sintered parts that are near-fully dense, with minimal dimensional distortion.

Foams having increased heat distortion temperature made from blends of alkenyl aromatic polymers and alpha-olefin/vinyl or vinylidene aromatic and/or sterically hindered aliphatic or cycloaliphatic vinyl or vinylidene interpolymers

The present invention pertains to improved alkenyl aromatic polymer foams (and processes for their preparation) having increased heat distortion temperature and improved dimensional stability while maintaining good tensile/tear, creep and environmental dimensional change properties. The closed cell low density alkenyl aromatic polymer foams exhibit increased heat distortion temperature, when substantially random interpolymers of about 21 to about 65 mol % styrene are blended in. When these same alkenyl aromatic polymer foams are made without these interpolymers, the heat distortion temperature is not improved.

Foams made by photopolymerization of emulsions

The invention discloses methods for making foams by photopolymerizing emulsions comprising a reactive phase and a phase immiscible with the reactive phase components. Foams made from water-in-oil emulsions, including high internal phase emulsion are disclosed. Articles and uses for the foams are also described.

Concrete cleaning composition

A water and oil absorbant concrete cleaning composition is disclosed comprising shreds of a hydrophilic, open-celled, solids-loaded polyurethane foam. Methods are also disclosed to bind the solids to the cellular foam matrix.

Patent JPS5022064B1

Nonextruded dispersions and concentrates of additives on olefin polymers

A dispersion of one or more additives to be used in the processing of olefin polymers or copolymers, said dispersion comprising nonextruded particles of olefin polymers containing at least two immiscible polyolefinic phases and having internal voids partially or totally filled by the said additive or additives.

Espuma de poliisocianurato

La presente invención se refiere a una espuma de poliisocianurato, que comprende el producto de reacción, en presencia de un agente de soplado y un catalizador de (a) un quasi-prepolímero terminado en un grupo isocianato, preparado mediante la reacción de un poliisocianato orgánico con un compuesto orgánico que tiene por lo menos dos átomos de hidrógeno activos, (b) una cantidad menor de un compomente de poliol.

Composition based on propylene polymer, process for its obtention, use for the manufacture of expanded granules and cellular articles

A composition for expanded granules based on semi-crystalline propylene polymer comprising, per 100 parts by weight, less than 0.025 part by weight of volatile compounds and processes for its preparation.

Expanded polypropylene granule composition

Expanded granules or a moulded article made therefrom, based on semicrystalline propylene polymer comprising, per 100 parts by weight, less than 0.035 parts by weight of volatile compounds and processes for its preparation.

Process for the preparation of polypropylene resin foams

A process for the preparation of a polypropylene resin foam having closed cells by irradiating high energy rays onto a mixture of a polypropylene resin, a foaming agent, and a crosslinking promotor to cause cross-linking of the polypropylene resin and thereafter heating the mixture to a temperature higher than the decomposition temperature of the foaming agent.

Low density microcellular carbon foams and method of preparation

A low density, open-celled microcellular carbon foam is disclosed which is prepared by dissolving a carbonizable polymer or copolymer in a solvent, pouring the solution into a mold, cooling the solution, removing the solvent, and then carbonizing the polymer or copolymer in a high temperature oven to produce the foam. If desired, an additive can be introduced in order to produce a doped carbon foam, and the foams can be made isotropic by selection of a suitable solvent. The low density, microcellular foams produced by this process are particularly useful in the fabrication of inertial confinement fusion targets, but can also be used as catalysts, absorbents, and electrodes.

Method of curing a solution of rubber and of foamed rubber

Patent JPS5720970B2

A process for preparing permeable membranes which comprises kneading in the molten state two different kinds of thermoplastic synthetic resins which are partly compatible with each other, fabricating the molten mixture into a sheet, film or hollow article, treating the fabricated article with a solvent which is a good solvent for one of the component resins but is a poor solvent for the other to dissolve and remove the former resin, drying the fabricated article, and then stretching it. In place of the resin to be removed by the solvent, rubbers or oligomers having partial compatibility with the resin which remains undissolved can be used.

Thermoplastic polymer composition

A thermoplastic polymer composition comprises a thermoplastic polymer and a nucleating agent. The nucleating agent comprises a compound conforming to the structure of Formula (I) or Formula (II).

Thermoplastic polymer composition

A thermoplastic polymer composition comprises a thermoplastic polymer and a nucleating agent. The nucleating agent comprises a compound conforming to the structure of Formula (I) or Formula (II)

Thermoplastic polymer composition

A thermoplastic polymer composition comprises a thermoplastic polymer and a nucleating agent. The nucleating agent comprises a compound conforming to the structure of Formula (I) or Formula (II)

Insoluble porous polymeric-phenolic complexes

Phenolic complexes of water-insoluble but water-swellable crosslinked N-vinyllactam or N-alkyl-N-vinylamide polymers in the form of porous beads or granules and a process of preparing same. The complexes are particularly suited for use in situations wherein phenolic materials in limited quantities are desired such as, for example, in canisters or columns which are used to treat liquids or water. The novel complexes are prepared by adsorbing a phenolic material onto the porous granular or porous bead-like crosslinked N-vinyllactam or N-alkyl-N-vinylamide polymers.

Cell regulators in structural foams

Cellular structure of blown structural polyphenylene oxide resins is regulated by incorporation of certain acrylamide polymers in the molding compositions thereof. The cell regulating acrylamide polymers may be homopolymers or co-polymers of acrylamide, or of substituted acrylamides or interpolymers of such acrylamide compounds with compounds containing a vinyl group.

Sinterable semicrystalline powder and products formed using it

분체를 선택적인 레이저 소결기에서 소결시켜 거의 충분히 치밀한 소결된 부재를 형성하는 특수한 특성을 갖는 레이저 소결 간능한 분체 생성물이 제조된다. 대부분의 목적에 있어서, 소결된 부재는 분체를 등방성으로 성형함으로써 동일한 치수를 갖는 또다른 부재와 구별 불가능하다. 연화점 근처의 온도에서 자유 유동성인 것외에 유용한 분체는 평균 직경이 180㎛ 이상인 기본 입자가 실질적으로 존재하지 아니하며, 단 크기가 53㎛ 미만인 입자들의 수의 평균 비율이 80% 이상이며, 나머지 큰 입자들의 크기는 53 내지 180㎛인 2 줄 분포를 갖는 것으로 공개되어 있다. 10 내지 20℃/분의 등급에서 스캐닝 속도에 대한 차동 주사 열량계 특성에서 발열 및 흡열 특성의 오버랩이 없는 것으로 입증된 재결정화 속도가 느린 분체는 또한 치수 변형이 최소화되는 거의 충분히 치밀한 부재를 생성한다. A laser sintered compact powder product is produced having the special property of sintering powder in an optional laser sintering machine to form a sintered member that is nearly sufficiently dense. For most purposes, the sintered member is indistinguishable from another member having the same dimensions by molding the powder isotropically. Aside from being free flowing at temperatures near the softening point, useful powders are substantially free of basic particles having an average diameter of at least 180 μm, provided that the average proportion of the number of particles having a size of less than 53 μm is at least 80%, It is known that the size has a two-row distribution of 53 to 180 μm. Slow recrystallization powders that have proven to have no overlap of exothermic and endothermic properties in differential scanning calorimetry properties for scanning speeds at grades of 10 to 20 ° C./min also produce nearly sufficiently dense members with minimal dimensional deformation.

Method of preparing fireproof elastic polyurethane foam

FIELD: thermoinsulating materials. SUBSTANCE: at preparing elastic polyurethane foam by reaction of polyol and polyisocyanate in the presence of swelling graphite, amine activating agent, stabilizer and water swelling graphite is mixed preliminary with melamine at the mass ratio (1.5-2):3, respectively, at the total graphite and melamine concentration 20-40% of reaction mixture mass. Graphite and melamine were added first to polyol part, and amine activating agent, stabilizer and water were added to the second part of polyol. Also, fireproofing agent is added to polyol containing graphite and melamine. Swelling graphite particle size can be from 0.2 to 100 mm. EFFECT: improved method of polyurethane foam preparing. 2 dwg, 3 tbl $ 9ЗО0ОУтО0с ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2 040 531 ' С 0$ С 18/40//С 08 С 18/40, С 13) СЛ 08 С 101:00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 4894914/05, 02.04.1991 (30) Приоритет: 03.04.1990 ОЕ Р 4010752.3 (46) Дата публикации: 25.07.1995 (56) Ссылки: Патент Англии М 2168706, кл. С 08К 304, опублик. 1988. (71) Заявитель: Метцелер Шаум ГмбХ (0Е) (72) Изобретатель: Ульрих Хайтманн[0Е], Хериберт Россель ОЕ] (73) Патентообладатель: Метцелер Шаум ГмбХ (ОЕ) (54) СПОСОБ ПОЛУЧЕНИЯ ОГНЕСТОЙКОГО ЭЛАСТИЧНОГО ПЕНОПОЛИУРЕТАНА (57) Реферат: Использование: для изготовления термоизоляции. Сущность: при получении эластичного пенополиуретана по реакции полиола и полиизоцианата в присутствии вспучивающегося графита, — аминного активатора, стабилизатора и ВОДЫ, вспучивающийся графит предварительно смешивают с меламином при массовом соотношении (1,5 2) 3 соответственно, при суммарном количестве графита и меламина, равном 20 40% от массы реакционной смеси. Графит и меламин сначала примешивают к части полиола, а во вторую часть полиола вводят аминный активатор, стабилизатор и воду. В ту часть полиола, в которую введены графит и меламин, вводят также огнезащитное средство. Размер ...

Polyurethane having acrylic polyol and method for preparing the same

푸란계 폴리에스터폴리올; 아크릴릭 폴리올(Acrylic polyol); 및 환형 지방족 디이소시아네이트계 화합물의 반응 생성물을 포함하는, 아크릴릭 폴리올을 포함하는 폴리우레탄이 제공된다. 이에 따라, 다양한 분야에 본 발명의 폴리우레탄을 적용할 수 있으며, 특히 코팅재로 활용할 수 있다. 또한, 바이오매스로부터 푸란계 폴리에스터폴리올을 얻어 환경오염을 줄이고, 생물자원의 효율성을 높일 수 있다. Furan-based polyester polyols; Acrylic polyol; And a reaction product of a cyclic aliphatic diisocyanate-based compound, and a polyurethane containing an acrylic polyol. Accordingly, the polyurethane of the present invention can be applied to various fields, and particularly, it can be utilized as a coating material. In addition, furan-based polyester polyols can be obtained from biomass to reduce environmental pollution and increase the efficiency of biological resources.

焼結性半晶質粉体及びこの粉体で形成した物品

(57)【要約】 独特の性質を持つレーザー焼結性粉体製品を調製する。この粉体により、選択的レーザー焼結機で焼結を行い、ほぼ完全に緻密な焼結部品を形成することができる。多くの目的について、焼結部品は、粉体を等方性に型成形することによって製作した同じ寸法の別の部品と区別できる。軟化温度近くの温度で自由に流動できることに加え、１８０μｍ以上の平均粒径を持つ粒子が実質的になく、５３μｍよりも小さい粒子の数平均比が８０％以上で、残りの大径粒子の粒径が５３μｍ乃至１８０μｍの２段分布の有用な粉体が開示されている。毎分１０℃乃至２０℃程度の走査速度についての示差走査熱分析特性において吸熱ピークと発熱ピークが重ならないことによって、ゆっくりとした再結晶速度を持つことが証明された粉体もまた、寸法上の歪を最小にしてほぼ完全に緻密な焼結部品を形成できる。

Procedimiento para la obtencion de espumas de moldeo blandas, de poliuretano, endurecibles en frio.

Espumas de moldeo blandas de poliuretano endurecibles en frío preparadas mediante reacción.

Automotive molded roof material and process for producing the same

A process for producing an automotive molded roof material is provided which comprises sheeting a foamable sheet forming composition comprising a specified propylene resin, a glass fiber, a radical initiator, a crosslinking auxiliary and a foaming agent in specific proportions into a foamable sheet, lining one side of the foamable sheet with a backing sheet so as to integrate these and irradiating the foamable sheet with ionizing radiation to thereby crosslink the propylene resin, followed by heating the foamable sheet so as to cause the foamable sheet to foam, placing a cover sheet on the other side of the foamed sheet before the sheet cools to solidify and press molding the cover sheet on the foamed sheet to cover. There is also provided an automotive molded roof material produced by the above process. An automotive molded roof material is obtained which can be recycled, is lightweight and has high rigidity.

Polypropylene microporous membrane for battery separator

A battery separator is a polypropylene microporous membrane, made from a beta-nucleated precursor, and having an electrical resistance of less than 30 ohms-inches per mil, and a puncture strength of greater than 400 grams-force per mil. mil.

High melt index microporous films

Microporous films having improved permeability and heat stability are prepared from a precursor film which is based upon a polymer having a melt index of about 5 to about 50 and a weight average molecular weight of about 100,000 to 240,000. Such films are useful as filters, flow control devices and in other areas where improved heat stability and permeability and increased pore sizes are desired.

発泡剤組成物

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

赤外線減衰剤を含む微小気泡発泡体及びその使用方法

(57)【要約】 赤外線減衰剤（ＩＡＡ）を含む排気された及び未排気の微小気泡発泡体が開示される。この排気された発泡体は70マイクロメートル以下の平均気泡径を有する。この未排気の発泡体は1.0マイクロメートル以下の平均気泡径を有する。ＩＡＡは、大きな気泡径を有する発泡体におけるよりもこれらの発泡体において、発泡体の熱伝導率を大きく低下させる。この発泡体を用いる方法も開示される。

防振材料

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Nonextruded dispersions and concentrates of additives on olefin polymers

A dispersion of one or more additives to be used in the processing of olefin polymers or copolymers, said dispersion comprising nonextruded particles of olefin polymers containing at least two immiscible polyolefinic phases and having internal voids partially or totally filled by the said additive or additives.

Material and manufacturing method of plastic parts

직경이 0.018 내지 0.102 cm(0.007 내지 0.040 in)인 구상 입자는 육안으로 관찰가능한 한계 미만의 다공성을 갖는 제품으로서 가열 모울드면 상에서 캐스팅시키고, 용융시켜 표시 두께가 0.102 cm(0.040 in)인 재료의 박층을 형성하고, 냉각시키고 모울드면으로부터 제거하기에 적합한 용융 압출시킨 열가소성 재료로부터 제조한다. 이 방법은 열가소성 수지, 가소제(필요시) 및 블렌드의 5 중량% 미만으로 구성된 안료 첨가제를 블렌딩하고, 용융 압출시켜서 형성된 미소구를 평활한 구상 입자의 형상으로 제공하는 단계; 가열 캐스팅 표면을 제공하고 가열 캐스팅 표면에 대해 상기 미소구의 소정량의 충전물을 분배하는 단계; 미소구를 다공도가 0.008 cm(0.003 in) 미만인 열가소성 재료의 층으로 용융시킨 후, 비다공성 층을 냉각시키고 캐스팅 표면으로부터 제거하는 단계로 이루어지며, 이 방법의 한 실시태양에서는 미소구를 가공물과 실질적으로 동일한 중량을 갖는 상기 미소구로 이루미진 고정량의 충전물로서 제공하는 단계; 미소구를 미소구가 박층으로 용융 유동되는 가열 모울드 상으로 원심적으로 캐스팅시키고, 냉각시키고 모울드로부터 제거하는 단계로 이루어지며, 이 방법의 또다른 실시태양에서는 미소구를 가공물의 중량보다 큰 중량으로 제공하고, 미소구를 박층으로 용융 유동시킴으로서 가열 모울드면에 대한 미소구 재료의 정지 압력을 유지하기 위하여 가열 모울드면에 넣는 것 Spherical particles with a diameter of 0.018 to 0.102 cm (0.007 to 0.040 in) are products having a porosity below the visually observable limit, cast on a heating mold surface and melted to produce a thin layer of material with a display thickness of 0.102 cm (0.040 in). It is made from a melt extruded thermoplastic material suitable for forming, cooling and removing from the mold surface. The method comprises the steps of blending a pigment additive consisting of less than 5% by weight of a thermoplastic, a plasticizer (if necessary) and a blend and melt extruding to provide the microspheres formed in the shape of smooth spherical particles; Providing a heating casting surface and dispensing a predetermined amount of charge of the microspheres with respect to the heating casting surface; The microspheres are melted into a layer of thermoplastic material having a porosity of less than 0.008 cm (0.003 in.), Followed by cooling and removing the nonporous layer from the casting surface. In one embodiment of the method, the microspheres are substantially free from the workpiece. Providing as a fixed amount of filler comprising said microspheres having the same weight; Centrifugally casting, cooling and removing from the mold the microspheres onto a heating mold ...

Process for producing permeable membranes

A process for preparing permeable membranes which comprises kneading in the molten state two different kinds of thermoplastic synthetic resins which are partly compatible with each other, fabricating the molten mixture into a sheet, film or hollow article, treating the fabricated article with a solvent which is a good solvent for one of the component resins but is a poor solvent for the other to dissolve and remove the former resin, drying the fabricated article, and then stretching it. In place of the resin to be removed by the solvent, rubbers or oligomers having partial compatibility with the resin which remains undissolved can be used.

POROUS CRYSTALLIZED AROMATIC POLYCARBONATE PREPOLYMER, A POROUS CRYSTALLIZED AROMATIC POLYCARBONATE AND METHOD FOR PRODUCING THE SAME

Automotive molded roof material and process for producing the same

특정의 프로필렌 수지, 유리섬유, 래디컬 개시제, 가교조제 및 발포제로 된 발포성 시트형성 조성물을 소정의 비율로 발포성 시트로 시트화하고, 이 발포성 시트의 한쪽에 배면시트를 붙여 일체화하고, 이 발포성 시트에 전리 방사선을 조사하여 프로필렌 수지(A)를 가교한 후, 발포성 시트를 가열하여 발포성 시트를 발포하고, 이 시트를 고체화하기 위한 냉각전에 발포화 시트의 표면에 표피시트를 재치하고 표피시트가 덮인 성형물을 프레스성형하는 공정으로 된 자동차용 성형 루프재의 제조방법을 제공한다. 이렇게 하여 재생이용이 가능하고, 경량이며 고 경도의 자동차용 성형 루프재를 얻는다. A foamable sheet forming composition comprising a specific propylene resin, glass fiber, radical initiator, crosslinking aid, and foaming agent is sheeted into a foamable sheet at a predetermined ratio, and a back sheet is attached to one side of the foamable sheet to integrate the foam sheet. After crosslinking the propylene resin (A) by irradiating with ionizing radiation, the foam sheet is heated to foam the foam sheet, and the skin sheet is placed on the surface of the foam sheet before cooling to solidify the sheet, and the molded article is covered with the skin sheet. Provided is a method for manufacturing a molding roofing material for an automobile, which is subjected to press molding. In this way, it is possible to recycle and obtain a lightweight and high hardness molded roofing material for automobiles.

Process for producing porous crosslinked polymer

Expandable styrene polymers

Expandable styrene polymers containing   a) a styrene polymer,   b) from 0.05 to 3 % by weight, based on a), of water,   c) from 0.001 to 1 % by weight, based on a), of a finely divided organic polymer having a water-absorption capacity of at least 10 g/g,   d) from 0.5 to 8 % by weight, based on a), of a C3- to C6-hydrocarbon, and optionally   e) conventional additives in effective amounts, are distinguished by good flow properties and a low degree of clumping during prefoaming.

Styrene polymers containing blowing agents

Patent JPH0238100B2

Patent SU365895A3

Absorbent foam materials for aqueous body fluids and absorbent articles containing such materials

Disclosed are absorbent foam materials suitable for use as or in the absorbent cores of absorbent articles, such as diapers which absorb and retain aqueous body fluids. Such foam materials comprise hydrophilic, flexible open-celled structures which are preferably prepared by polymerizing high internal phase (HIPE) water-in-oil emulsions. Such foam materials have a pore volume of from about 12 to 100 mL/g, and a capillary suction specific surface area of from about 0.5 to 5.0 m 2 /g. These materials also exhibit a resistance to compression deflection such that a confining pressure of 5.1 kPa produces after 15 minutes a strain of from about 5% to 95% compression when the material is saturated at 37° C. to its free absorbent capacity with synthetic urine.

Novel compositions and process

Polyurethanes having a two phase morphology and characterized by high impact strength and, optionally, high modulus are obtained by reaction of 4,4'-methylenebis(phenyl isocyanate) and modified forms thereof with an aliphatic glycol extender and a blend of at least two polyoxypropylene-polyoxyethylene polyols both of which have average functionalities in the range of 2 to 4, one of which has a molecular weight in the range of about 3000 to 10,000 and contains at least 23 percent by weight of ethylene oxide residues and the other has a molecular weight in the range of about 750 to about 2000 and contains at least 45 percent by weight of ethylene oxide. The two or more such polyols are employed in proportions such that the aliphatic glycol extender is completely miscible with said polyols if blended together.

Smoke retardant compositions

1. AS A COMPOSITION OF MATTER, A POLYVINYL HALIDE ADMIXED WITH A SMOKE RETARDANT AMOUNT OF A COPPER OXIDEMOLYBDENUM OXIDE MIXTURE.

ポリイソシアヌレ−トフォ−ム用触媒混合物

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Microporous polylactide powders and a process for their preparation

Microporous polylactide powders having an intrinsic isotropic structure being spherical in a shape and containing interconnecting hollow spaces or openings i.e., micropores are obtained by the steps of heating a polylactide in xylene until substantially complete solution is reached; cooling the resultant clear solution; and separating off the xylene. The microporous powder form powders can have active substances such as a medicament introduced therein i.e. unto the pores and the resultant powder can be used for controllably dispensing the medicament i.e., as a prolonged release form.

Method producing a color coded, cellular thermoplastic resin coated wire and the materials necessary for the coating

A particulate concentrate, for example pellets, is provided comprising predetermined amounts of a pigment and a blowing or foaming agent in a polymer matrix. The concentrate can be added to an extruder together with a polymer insulating material for the formation of color-coded cellular insulation on a conductor wire of a cable, for example a communication cable. The composition of the concentrate is so determined that different color-coded, cellular, insulating coatings can be produced which are dielectrically matched, as required.

Process for the production of expanded particles of a polypropylene resin

A process for the production of expanded particles, which comprises providing an aqueous dispersion containing expandable particles which are formed of a polypropylene resin and which contain a blowing agent and an expansion aid and maintained at a temperature higher than the softening point of the resin and under a pressurized condition, and subjecting the dispersion to a lower pressure so that the expandable particles are expanded. The expansion aid is organic or inorganic solids having a particle size of 0.1 to 150 μm and a melting point higher than the temperature at which the expansion of the expandable particles is performed and serves to improve the expansion ratio.

Flammhemmende Latexmischungen

Foamable polyolefin particles

Processo per la preparazione di manufatti in polipropilene espanso mediante produzione di granuli pre-espansi e termoformatura per sinterizzazione degli stessi

Manufatti in polipropilene espanso vengono preparati mediante termoformatura per sinterizzazione di granuli pre-espansi sostanzialmente costituiti da polimeri propilenici aventi melt strenght da 5 a 40 cN.

Process for preparing foamed and crosslinked shaped articles having improved heat-sealability and foamable and crosslinkable polyethylene resin composition used therefor

A process for preparing a foamed and crosslinked polyethylene resin shaped article having improved heat-sealability, which comprises melt-kneading (a) a silane-modified polyethylene resin, (b) a heat-decomposable blowing agent, (c) a silanol condensation catalyst, and (d) an organic peroxide at a temperature lower than the decomposition temperature of the heat-decomposable blowing agent (b), shaping the mixture, and heating the resulting foamable and crosslinkable shaped articles to the decomposition temperature of the heat-decomposable blowing agent or to a higher temperature thereby to foam and crosslink it; and a foamable and crosslinkable polyethylene resin composition used therefor.

Polypropylene composition and foamed polypropylene sheet therefrom

A polypropylene composition consisting essentially of from 30 to 80 parts by weight of a crystalline polypropylene, from 10 to 40 parts by weight of a non-crystalline polypropylene, and from 10 to 40 parts by weight of a low density polyethylene. A foamed polypropylene sheet made of the polypropylene composition has excellent impact resistance and a good texture.

Novel open-celled microporous film

OPEN-CELLED MICROPOROUS POLMER FILMS CHARACTERIZED BY HAVING A REDUCED BULK DENSITY AS COMPARED TO THE BULK DENSITY OF THE CORRESPONDING POLYMER FILMS HAVING NO OPEN-CELLED STRUCTURE, A CRYSTALLINITY OF ABOVE ABOUT 30 PERCENT, A PORE SIZE OF LESS THAN 5000 ANGSTROMS AND A NITROGEN FLUX OF GREATER THAN 35.4, ARE PREPARED BY THE CONSECUTIVE STEPS OF COLD STRETCHING, HOT STRETCHING AND HEAT SETTING A NON-POROUS, CRYSTALLINE, ELASTIC FILM.

Composition for a crosslinked polyolefin foam

A composition for a crosslinked polyolefin foam is prepared from 20 to 75% by weight of a crystalline propylene copolymer containing 1 to 15% by weight of ethylene and having a crystallinity higher than 50% and 80 to 25% by weight of polyethylene.

RIGID EXPANDED POLYPROPYLENE MATERIALS AND PROCESS FOR THEIR PREPARATION

EXPANDED POLYPROPYLENE FILMS AND PROCESS FOR PREPARING THE SAME

高透过性聚丙烯微孔膜及其制法

本发明是一种高透过性聚丙烯微孔膜。它是由高β晶型含量均匀的聚丙烯原始膜片经双轴拉伸制得的。其流量平均孔径是200～800A。90%流量孔径与流量平均孔径的比值＜2。孔隙率30～35%，25℃氮气透过系数为1-5×10 -3 毫升/厘米·秒·大气压。膜面内各方向力学性能均匀：拉伸强度为60-150Mpa，断裂伸长30-200%，杨氏模量为0.40-1.2Gpa。可用于气体分离膜、反渗透膜膜底；无菌包装、无菌帐等医用功能材料；电池隔膜；透气性防水材料；一次性防护服；气、液超净过滤等。

Foamed and oriented blends of low density polyethylene and polypropylene

A blend is made of a low density polyethylene and polypropylene. The blend is foamed with a blowing agent. A colorant can be incorporated into the polyethylene and/or into the polypropylene whereupon the two polymers are then blended and foamed, as by extruding with a foaming or expanding agent in the final blend. Sheets, films, rods, ribbons, filaments tows, and other shapes can be extruded. The extrudate is oriented to yield a product having increased opacity and improved sheen.

Production of low density polypropylene foam

A method of producing a foamed product having a density less than 0.2 g/cm 3 , which comprises foaming a composition comprising a major proportion of a low viscosity polypropylene component having a melt viscosity (at 190° C. and a shear rate of 1000 sec -1 ) of less than 2×10 3 poise and a minor proportion of a high viscosity polypropylene component having a melt viscosity (at 190° C. and a shear rate of 1000 sec -1 ) of greater than 2.5×10 3 poise.

Polypropylene microporous film

Polypropylene microporous films characterized by having a porosity of 30-35%, an average pore size of 200-800 Angstroms, a permeation coefficient for nitrogen of 1-5x10-3 ml/cm sec atm and a tensile strength of greater than 60 MPA in all directions within the film plane are prepared by the consecutive steps of biaxial stretching a non-porous starting film of high beta -crystal content and heat setting the stretched film.

Method of making foamed thermoplastic adhesive materials and adhesive process therefor

Foamed thermoplastic materials such as coatings, adhesives and structural bodies are made by a method which offers significant advantages and economies. The method involves the steps of stabilizing a dispersion of gas in a molten thermoplastic material by adding a surfactant to the molten material in a sufficient stabilizing amount and subsequently pressurizing the stabilized dispersion to form a hot solution. Thereafter, the hot solution is dispensed under lower pressure whereby the gas is released from solution to form a foamed material. The method is especially advantageous in making hot melt thermoplastic adhesives which are very useful in bonding substrates with efficiency and superior bond strengths. Continuous and reliable foaming operations are achieved with a uniform quality and output of foamed materials. Thermoplastic materials are also capable of being foamed with relatively simple mechanical apparatus and under conditions which provide considerable savings of energy. The number of thermoplastic materials which can be foamed employing the present technique in a controlled manner is unlimited. The method of stabilization is conducted at low or ambient pressures and resulting stabilized hot thermoplastic-gas dispersions may then be pumped with pressurization and dispensed with immediate foaming.

Apparatus and method for dispensing foamable compositions

Pressure vessels are disclosed for containing a foamable mixture of liquid and a blowing agent for incrementally or continuously dispensing a foam of constant foam-volume ratio. Liquid compositions having coating or polymeric solids are capable of being foamed and dispensed with the apparatus. The method and apparatus are especially advantageous in dispensing foamed coatings, paints or adhesives with superior control.

High molecular weight polyolefin porous film and its manufacturing method

본 발명은 여과재, 수계 전지용 세퍼레이터, 전지용 세퍼레이터 필름, 전해 콘덴서용 세퍼레이터 필름, 통기성 필름의 용도, 종이 기저귀나 하우스 랩등의 투습 방수용도, 기타 의류ㆍ포장ㆍ인쇄 분야의 용도에 적합한 강도 및 투기도가 우수한 고분자량 폴리올레핀 미세 다공 필름 및 그 제조방법에 관한 것으로, 그 특징으로 하는 것은 상기 필름이 연신 쇄결정과 판상 결정으로 되는 파이브럴(fibril) 및/또는 나선상 결정으로 되는 파이브럴로 구성되는 점이다. 이 고분자량 폴리올레핀 미세 다공 필름은 가소제 및/또는 용제를 실질적으로 포함하지 않는 극한점도[

Hydrophobic microporous materials and process for producing same

A normally hydrophilic microporous material having a polymeric matrix and a filler dispersed throughout the matrix wherein the filler contains active polar groups, is rendered hydrophobic by exposing the material to a reactive compound. In one preferred embodiment of the invention the reactive compound is a silane or a silazane whereas in another preferred embodiment the reactive compound is a Werner-type complex of fatty acids coordinated with a metal. The treated microporous material is rendered impervious to water-based liquids but remains pervious with respect to vapors or gases.

Method of making magnesium oxychloride cement cofoamed with synthetic resin

A method of making a foamed fireproof product of magnesium oxychloride cement and the resulting product. A porous substrate is impregnated with a foaming mixture of magnesium chloride, magnesium oxide, and frothing agent in water. The mixture hardens with small voids throughout the porous substrate, thus providing a fireproof product of low density. The cement mixture may be co-foamed with polyurethane foam. The fireproof products of relatively low density are particularly valuable for building and construction purposes. Magnesium powder is the preferred frothing agent which, in combination with a surfactant, induces a large volume of small bubbles that remain in the composition as it is set.

Fireproof product using magnesium oxychloride cement

A method of making a foamed fireproof product of magnesium oxychloride cement and the resulting product. A porous substrate is impregnated with a foaming mixture of magnesium chloride, magnesium oxide, and frothing agent in water. The mixture hardens with small voids throughout the porous substrate, thus providing a fireproof product of low density. The foamed product may be formed in a mold with fibrous elements inroduced into the foaming mixture. The fireproof products of relatively low density are particularly valuable for building and construction purposes. Magnesium powder is the preferred frothing agent which, in combination with a surfactant, induces a large volume of small bubbles that remain in the composition as it is set.

Lightweight concrete

Method of controlling the pyrolysis rate of a plastic foam

The thermal shrinkage and pyrolysis rate of plastic foam moldings are successfully controlled by coating the expandable plastic beads used in the preparation of the moldings with varying amounts of substantially water-insoluble inorganic siliceous materials. The plastic foam moldings are useful as patterns in an evaporative casting process, wherein the molding is vaporized and replaced by molten metal.

Composite foams of low thermal conductivity

A composite foam of low thermal conductivity comprises a) 20-80% by volume of silica aerogel particles having a mean diameter of from 0.1 to 20 mm and a density of from 0.08 to 0.40 g/cm3, b) 20-80% by volume of a styrene polymer foam which surrounds the particles of component a) and binds them to one another and has a density of from 0.01 to 0.15 g/cm3, and, if desired, c) conventional additives in effective amounts.

Microporous film with improved properties

A microporous, hydrophilic polymer film has a morphology composed of distinctively interconnected pores, which are desirably surface-open. In particular aspects, the film can provide for a water vapor transmission rate (WVTR) value of at least about 1000 grams per square meter per 24 hours per mil (0.00254 cm) of film thickness. The film can exhibit a modulus of not less than about 1 MPa, and may also exhibit an elongation strain at break of at least about 100% in both its machine and transverse directions. The film can also provide for a water contact angle of not more than about 80 degrees. In other aspects, the porous film can also include other properties or characteristics, such as a desired tensile strength at break, a desired elongation-at-break, and voids or pores having distinctive shapes, sizes, distributions and configurations.

Materials and methods for manufacturing plastic parts

Viscoelastic sound insulating foam having an adhesive surface and method of using the same

Flexible polyurethane foam production process

FIELD: polymer production. SUBSTANCE: flexible polyurethane foam with NCO index 70-120 is prepared by interaction of (i) polyisocyanate composition containing 5-20 wt. parts toluenediisocyanate and 80-95 wt. parts diphenylmethanediisocyanate and its homologues with (ii) polyol composition containing polyoxyethylene- polyoxypropylene polyol with 5-25 wt.% ethylene oxide groups, 2-7 wt. parts water, 2-10 wt. parts - polyol based on polyether with at least 60 wt.% ethylene oxide groups, and 1-15 wt. parts particulate material representing product of reaction of polyisocyanate with compound having a number of hydroxyl, primary and/or secondary amino groups and having equivalent weight up to 400, said material being dispersed in polyol composition. Foamed plastics prepared by method provided herein are also described as well as composition of prepolymer or semi- or quazi-prepolymer having 8-38 wt. % of free NCO groups. EFFECT: enabled production of foamed plastics with low density, high elasticity, durability, good attitude toward loading, rupture and stretching resistance. 6 cl, 2 tbl, 2 ex ЗЕ 3з6гс ПЧ сэ (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ” 2198 187‘ (51) МПК? 13) С2 С 08 С 18/10, 18/40, 18/76 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 99122340/04, 16.02.1998 (24) Дата начала действия патента: 16.02.1998 (30) Приоритет: 25.03.1997 ЕР 97200886.6 (46) Дата публикации: 10.02.2003 (56) Ссылки: 4$ 5436277 А, 25.07.1995. ЕР 0439792 А, 07.08.1991. 5Ц 1275018 А\, 07.12.1986. (85) Дата перевода заявки РСТ на национальную фазу: 25.10.1999 (86) Заявка РСТ: ЕР 98/00867 (16.02.1998) (87) Публикация РСТ: \М/О 98/42763 (01.10.1998) (98) Адрес для переписки: 129010, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Н.Г. Лебедевой рег. № 0112 (71) Заявитель: ХАНТСМЭН ИНТЕРНЭШНЛ ЛЛС (4$) (72) Изобретатель: ХАЙДЖЕНС Эрик (ВЕ) (73) Патентообладатель: ХАНТСМЭН ИНТЕРНЭШНЛ ЛЛС (4$) (74) ...

Laminates of aluminum and polypropylene foam and method therefor

Degradable polydioxaneone-based materials

Disclosed are degradable materials including molded products, laminates, foams, pellets, nonwoven materials, adhesives, coatings and films, and particularly packaging films. The materials are made using polydioxaneone polymers comprising at least two different dioxaneone-based repeating units. Preferred polymers are polydioxanediones. First repeating units have less carbon atoms in constituent groups extending from the polymer backbone than second repeating units. Physical characteristics and degradation of the materials can be varied by varying the choice and/or relative proportions of first and second repeating units in the polydioxaneone polymers.

Degradable polydioxaneone-based materials

Disclosed are degradable materials including molded products, laminates, foams, nonwoven materials, adhesives, coatings and films, and particularly packaging films. The materials are made using polydioxaneone polymers comprising at least two different dioxaneone-based repeating units. Preferred polymers are polydioxanediones. First repeating units have less carbon atoms in constituent groups extending from the polymer backbone than second repeating units. Physical characteristics and degradation of the materials can be varied by varying the choice and/or relative proportions of first and second repeating units in the poldioxaneone polymers. Methods for preparing polydioxaneone polymers that can be used in the manufacture of the materials are also discussed, as are suitable monomers and methods for preparing such monomers.

Degradable polydioxaneone-based materials

Disclosed are degradable materials including molded products, laminates, foams, nonwoven materials, adhesives, coatings and films, and particularly packaging films. The materials are made using polydioxaneone polymers comprising at least two different dioxaneone-based repeating units. Preferred polymers are polydioxanediones. First repeating units have less carbon atoms in constituent groups extending from the polymer backbone than second repeating units. Physical characteristics and degradation of the materials can be varied by varying the choice and/or relative proportions of first and second repeating units in the polydioxaneone polymers. Methods for preparing polydioxaneone polymers that can be used in the manufacture of the materials are also discussed, as are suitable monomers and methods for preparing such monomers.

Degradable polydioxaneone-based materials

Disclosed are degradable materials including molded products, laminates, foams, nonwoven materials, adhesives, coatings and films, and particularly packaging films. The materials are made using polydioxaneone polymers comprising at least two different dioxaneone-based repeating units. Preferred polymers are polydioxanediones. First repeating units have less carbon atoms in constituent groups extending from the polymer backbone than second repeating units. Physical characteristics and degradation of the materials can be varied by varying the choice and/or relative proportions of first and second repeating units in the polydioxaneone polymers. Methods for preparing polydioxaneone polymers that can be used in the manufacture of the materials are also discussed, as are suitable monomers and methods for preparing such monomers.

Degradable polydioxaneone-based materials

Disclosed are degradable materials including molded products, laminates, foams, nonwoven materials, adhesives, coatings and films, and particularly packaging films. The materials are made using polydioxaneone polymers comprising at least two different dioxaneone-based repeating units. Preferred polymers are polydioxanediones. First repeating units have less carbon atoms in constituent groups extending from the polymer backbone than second repeating units. Physical characteristics and degradation of the materials can be varied by varying the choice and/or relative proportions of first and second repeating units in the polydioxaneone polymers. Methods for preparing polydioxaneone polymers that can be used in the manufacture of the materials are also discussed, as are suitable monomers and methods for preparing such monomers.

Biocompatible, antithrombogenic materials suitable for reconstructive surgery

Biocompatible, highly antithrombogenic material for reconstructive surgery, which is based on poly (L-lactic acid) and or poly (dL-lactic acid) and segmented polyester and urethanes or polyether urethanes.

Ultramicrocellular structures of crystalline organic polymer

Perforated foams

Thermoplastic polymer foams having sound deadening properties satisfactory for demanding applications are provided which have mechanical strength, which are economical to manufacture, and which are hydrolytically stable. Methods of preparing these foams are also provided. The foams are useful in sound management, cushion packaging, filtering, and fluid absorption and exhibit one or more of the following properties: 1) average cell size greater than about 2 mm; 2) substantially open-cell structure and 3) relatively large pores connecting the cells. In order that the foam be acoustically active, the foam should possess a substiantially open-cell structure and a relatively low airflow resistivity. Foams with substantially open-cell structure and relatively low airflow resistivity are prepared by mechanically opening a foam having an average cell size greater than about 2 mm. In most cases, such mechanical opening creates relatively large pores connecting the cells.

Foamable molding compound and process for the production of a propylene polymer foam sheet

Crosslinked chlorinated polyethylene foam

A crosslinked, soft, flexible, closed-cell foam of chlorinated high density polyethylene and a process for the preparation thereof, comprising admixing a high density chlorinated polyethylene with a thermally decomposable chemical foaming agent at a temperature below the decomposition temperature of said foaming agent, molding the chlorinated high density polyethylene into desired form at a temperature below the decomposition temperature of the foaming agent, subjecting the molded chlorinated high density polyethylene to irradiation cross-linking at a temperature below the decomposition temperature of said foaming agent and contacting, in a substantially oxygen-free environment, the crosslinked chlorinated high density polyethylene with a heat transfer medium maintained at a temperature of from about 150° C. to about 350° C. for a period sufficient to form the desired product.

Process for the production of highly absorbent polymers.

Process for producing porous polystyrene gel

A porous polystyrene gel is produced by a suspension polymerization in an aqueous system under an incorporation of more than 5 mole % of a radical polymerization catalyst to a total amount of styrene and divinyl benzene with an inert organic solvent.

Process for producing polypropylene foam

The invention relates to the process of the invention provides a radiation-crosslinked polypropylene foam by extrusion at a low temperature (about 170° C.) below the decomposition point of the blowing agent. The resulting foamed item has by far better heat resistance than conventional ones. The raw resin can be prepared by mixing a resin in the pellet form and a blowing agent in the powder form on account of the low-temperature flowability. Heretofore, such mixing was impossible because the blowing agent does not disperse completely. This outstanding effect of the invention was not expected at all from the known prior arts.

Method for producing foamed article from polypropylene

A method of producing a foamed article having a uniform cellular structure using a modified polypropylene produced by irradiating polypropylene with an ionizing radiation of from 0.1 to 5.0 megarad and graft-copolymerizing the irradiated polypropylene with from 0.5 - 6 percent by weight divinyl benzene or with from 0.5 - 6 percent by weight of divinyl benzene and not more than 10 percent by weight of an acrylic acid ester.

Melamine-formaldehyde foaming process

Gear throttle as a nucleation device in a continuous microcellular extrusion system

Expandable resinous particles

Polyolefin foam for sound and thermal insulation

Process for the production of moldings from particles of a foamed thermoplastic material

CELLULAR THERMOPLASTIC BODIES

METHOD FOR PRODUCING FOAM BODIES

Heat-foamable olefinic resin composition and process for production of olefinic resin foam from said composition

A heat-foamable olefinic resin composition comprising (a) an ethylenic polymer, (b) a propylene/alpha-olefin copolymer having a melting point of 130° to 160° C., (c) a propylene polymer having a melting point at least 10° C. higher than the melting point of the propylene/alpha-olefin copolymer, and (d) a blowing agent, and optionally (e) a crosslinking agent and/or a crosslinking promoting agent; and a process for producing an olefinic resin foam comprising crosslinking and heat-foaming the aforesaid heat-foamable olefinic resin composition.

Use of Schiff bases as cross-linking agents for high resilience polyurethane foam

Selected Schiff bases of aromatic and alkylsubstituted aromatic ortho diamines are employed as cross-linking agents in the preparation of high resilience polyurethane foam.