СПОСОБ ПОЛУЧЕНИЯ ПЕН НА ОСНОВЕ ТЕРМОПЛАСТИЧНЫХ ПОЛИУРЕТАНОВ

Изобретение относится к способу получения разбухших гранул из расплава полимера, содержащего вспенивающий агент. Способ получения вспененных частиц термопластичного полиуретана включает следующие стадии. Стадия плавления термопластичного полиуретана, осуществляемая в первом экструдере E1. Стадия впрыскивания газообразного вспенивающего агента, осуществляемая во втором экструдере E2. Стадия гомогенного пропитывания вспенивающего агента в расплав термопластичного полиуретана, осуществляемая в третьем экструдере E3. А также стадия экструзии пропитанного расплава термопластичного полиуретана через профилирующую планку и грануляции расплава в подводном устройстве для грануляции в условиях температуры и давления с образованием вспененных частиц термопластичного полиуретана. Технический результат изобретения заключается в повышении контроля технологических параметров. 4 з.п. ф-лы, 6 табл.

СШИТАЯ ЭЛАСТОМЕРНАЯ КОМПОЗИЦИЯ И ПРОДУКТ, СОДЕРЖАЩИЙ ТАКУЮ КОМПОЗИЦИЮ

Изобретение относится к применению продукта, полученного экструзией, и содержащего сшитую эластомерную композицию, в качестве уплотнительных прокладок, например, в транспортных средствах. Сшитая эластомерная композиция содержит мультиблок-сополимер этилена с альфа-олефином, содержащий полимеризированные звенья этилена и альфа-олефина, эластомер, содержащий блок-сополимер, представляющий собой по меньшей мере два ароматических одинаковых или разных блока, разделенных по меньшей мере одним эластомерным блоком, и сшиваемый полимер, представляющий собой трехблочный сополимер стирол-бутадиен-стирола(SBS). Мультиблок сополимера этилена с альфа-олефином имеет определенный индекс распределения молекулярных масс. Мультиблок сополимера этилена с альфа-олефином имеет определенную объемную массу и точку плавления, и цифровые значения этих изменяемых величин выражены приведенными определенными отношениями. Изобретение обеспечивает получение экономичной композиции, позволяющей достигать улучшенного компромисса ...

КАУЧУКОВАЯ КОМПОЗИЦИЯ ДЛЯ ПРОТЕКТОРА ШИНЫ

Изобретение относится к каучуковой композиции для протектора шины, способу изготовления ее, а также к нешипованной шине. Каучуковая композиция содержит диеновый каучук, от 1 до 20 весовых частей вальцуемого кремнекаучукового компаунда, от 0,2 до 20 весовых частей термически расширяемых микрокапсул и от 10 до 100 весовых частей наполнителей, содержащих кремнезем и углеродную сажу, на 100 весовых частей диенового каучука. Композиция также содержит от 3 до 15 вес.% силанового связывающего агента относительно общего количества кремнезема, введенного в вулканизированную каучуковую композицию. При этом вальцуемый кремнекаучуковый компаунд содержит кремнезем, а твердость каучука вальцуемого кремнекаучукового компаунда составляет от 10 до 50. Изобретение обеспечивает улучшенные характеристики трения шин на льду, превосходя обычные показатели. 3 н. и 4 з.п. ф-лы, 1 ил., 5 табл., 25 пр.

СИСТЕМА И СПОСОБ ПОЛУЧЕНИЯ IN SITU-ПЕНОМАТЕРИАЛА

ОСУЩЕСТВЛЯЕМЫЙ С ПОМОЩЬЮ ВАКУУМА СПОСОБ ИЗГОТОВЛЕНИЯ ЗАКРЫТОПОРИСТЫХ ЖЕСТКИХ ПЕНОПОЛИУРЕТАНОВ С ИСПОЛЬЗОВАНИЕМ СМЕШАННЫХ ПОРООБРАЗОВАТЕЛЕЙ

ПОЛУЧЕНИЕ ПЕНОМАТЕРИАЛА НА ОСНОВЕ PMMA С ПРИМЕНЕНИЕМ СШИВАЮЩИХ СРЕДСТВ, РЕГУЛЯТОРОВ И ПОРООБРАЗУЮЩИХ СРЕДСТВ

EIN- UND MEHRSCHICHTIGE POLYOLEFIN-SCHAUMSTOFFROHRE

Fluoropolymer foams,process to make them and applications thereof

Phenolic foam

Composition for forming polyurethane foam having flame retardancy and yellowing resistance

Laminated sheet and method for producing the same

Provided is a laminated sheet: that includes a top paper layer, which includes a synthetic paper and an adhesive layer, and a release-sheet layer, wherein the synthetic paper, the adhesive layer, and the release-sheet layer are provided in this order; that is configured such that the adhesive layer is a resin-composition foam sheet that contains a crosslinked reaction product of 1-20 parts by mass of a carbodiimide-based crosslinking agent and 100 parts by mass of (meth)acrylate ester copolymer resin having an N-methylol group and a glass-transition temperature of -10ºC, the release-sheet layer is formed of a thermoplastic resin sheet, the tensile elastic modulus ratio calculated on the basis of the tensile elastic modulus of the top paper layer and the tensile elastic modulus of the release-sheet layer is 0.1-10, and the release/adhesion strength between the adhesive layer and the release-sheet layer is 5-30 N/m; and that is also configured such that the release sheet and the adhesive ...

Molded foam article, foamed sole, and shoe

Provided is a molded foam article which includes a foam obtained by foaming a formation material comprising a resin component, the Asker C hardness of the foam being 10 or higher and the ratio (E40/E0) of the modulus of elasticity (E40) at 40% strain in relation to the modulus of elasticity (E0) at 0% strain for the foam being 0.5 or higher. This molded foam article is suitably soft and has little change in hardness under compressive deformation.

System and method for producing in-situ foam

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

Improving the properties in PMMA foams by using methacrylic amides

The present invention relates to novel PMMA foams and to their production. Here, polymers, obtained by copolymerizing methacrylic amides, such as for example N-isopropyl methacrylamide, and without styrol, are foamed. It has been surprisingly found that, according to the invention a stable, simple to produce PMMA foam with very good properties, such as very high compressive strength can be obtained, which in particular, can be bound much easier to cover layers compared to known PMMA foams.

Polyfunctional alcohols as cross-linkers in PMI foams

Abstract The invention relates to the production of PMI foams, more particularly to their formulating ingredients, which lead to particular facility in adjusting the density at given foaming temperature.

TWO-PART PHOSPHATE ESTER ELASTOMERIC EPOXY COMPOSITION AND METHOD OF USE THEREOF

The present teachings provide for a two-part system and a method of using the two-part system, the two-part system comprising: a first component including one or more epoxy resins; a second component including one or more phosphate esters; and wherein, upon mixing the first component and second component a cured elastomeric composition is formed in a temperature of about 0 °C to about 50 °C.

DUAL COMPOSITION BLOCK COPOLYMERS

Dual composition block copolymers made from conjugated diene and monovinyl aromatic monomers in batch organolithium initiated polymerization show advantageous performance in the production of crosslinked microcellular rubber compounds and pressure sensitive hot melt adhesives. The dual composition block copolymers are partially coupled with a coupling agent linking inner monovinyl aromatic blocks. Their un-coupled low molecular weight fraction has greater monovinyl aromatic repeating unit content than their coupled high molecular weight fraction. Crosslinked microcellular rubber articles made from these copolymers exhibit lower density, smaller and more homogeneous cell size, higher softness and higher resiliency than prior art block copolymers. Rubber compounding of formulations comprising the copolymers proceed at slightly lower torque and slightly lower temperature than with prior art block copolymers. Pressure sensitive hot melt adhesives formulated with the dual composition block copolymers ...

IMPROVING THE PROPERTIES IN PMMA FOAMS BY USING METHACRYLIC AMIDES

The present invention relates to novel PMMA foams and to their production. Here, polymers, obtained by copolymerizing methacrylic amides, such as for example N-isopropyl methacrylamide, and without styrol, are foamed. It has been surprisingly found that, according to the invention a stable, simple to produce PMMA foam with very good properties, such as very high compressive strength can be obtained, which in particular, can be bound much easier to cover layers compared to known PMMA foams.

COMPRESSIBLE FIRE RETARDANT FOAM

The present invention relates to a material for thermal and/or acoustic insulation which consists of at least 300 phr, preferably at least 400 phr, but less than 1200 phr, preferably less than 1000 phr, especially preferred less than 800 phr ingredients in total, comprising 100 phr of at least one polymer, of which at least 60 phr, preferably at least 70 phr, especially preferred at least 80 phr is chlorinated polyethylene (CPE), the process of manufacturing such material, wherein the polymeric material is expanded by decomposition of a chemical blowing agent.

POROUS CELLULOSIC MATERIALS AND PROCESS FOR THEIR PREPARATION

The invention relates to a process for preparing a cellulosic sponge comprising treating an aqueous suspension of cellulose fibers with periodate; adjusting the pH of the resulting dialdehyde cellulose fibers suspension to 2.5 to 5.5; freezing the suspension obtained and thawing the three dimensional structure to render the cellulosic sponge. The process may further comprise a step of drying to render a cellulosic foam. Both the new sponge and the new foam of the invention may also be further chemically modified obtaining a broad variety of derivatives with tailored properties which useful in many different applications.

FOAMED, OPACIFYING ELEMENTS AND METHODS OF MAKING

A foamable aqueous composition is used to form foamed, opacifying elements with one or more dry foamed layers. The composition contains: (a) 0.5 to 20 weight % of porous particles comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase. The porous particles have a mode particle size of 2 to 50 ¡.tm; (b) at least 20 weight % of a binder material; (c) 0.1 to 30 weight % of a combination of various additives including dispersants, plasticizers, inorganic or organic pigments and dyes, flame retardants, biocides, fungicides, optical brighteners, tinting colorants, metal flakes, and inorganic or organic fillers; (d) water; and (e) at least 0.001 weight % of an opacifying colorant different from (c). The foamable aqueous composition is suitably aerated, disposed on a porous substrate, dried, and crushed on the porous substrate to form a foamed, opacifying element.

METHOD FOR PREPARING POROUS SCAFFOLD FOR TISSUE ENGINEERING, CELL CULTURE AND CELL DELIVERY

The present invention relates to a method for preparing a porous scaffold for tissue engineering. It is another object of the present invention to provide a porous scaffold obtainable by the method as above described, and its use for tissue engineering, cell culture and cell delivery. The method of the invention comprises the steps consisting of: a) preparing an alkaline aqueous solution comprising an amount of at least one polysaccharide, an amount of a cross-linking agent and an amount of a porogen agent b) transforming the solution into a hydrogel by placing said solution at a temperature from about 4°C to about 80°C for a sufficient time to allow the cross-linking of said amount of polysaccharide and c) submerging said hydrogel into an aqueous solution d) washing the porous scaffold obtained at step c).

ELECTRET SHEET

Provided is an electret having high piezoelectric properties. An electret sheet of the invention is characterized in that it comprises a synthetic resin sheet is electrified by injecting electric charges thereinto, that the synthetic resin sheet comprises two types of synthetic resins incompatible with each other, and that these synthetic resins form a phase separated structure and are cross-linked through a polyfunctional monomer. Therefore, positive and negative charges in an apparently polarized state are present in the interfacial portions between the two types of synthetic resins incompatible with each other. By applying an external force to the electret sheet to deform it, the relative positions of these positive and negative charges are changed, and these changes cause a favorable electrical response. Therefore, the electret sheet has high piezoelectric properties.

NON-ISOCYANATE RIGID POLYMER FOAMS BY CARBON-MICHAEL ADDITION, AND FOAMING PROCESS

Polymer foam is made from a two-component foam system. The foam system includes an A-side component which contains a multifunctional Michael acceptor and a blowing agent that has a boiling temperature in the range -40°C to +100°C. The system also includes a B-side component that contains a multifunctional carbon-Michael donor, a surfactant and a blowing agent that has a boiling temperature in the range -40°C to +100°C. The viscosities of each of the components are 2,500 cPs or lower. Foam is made by separately pressurizing the components, then separately depressurizing them so they each at least partially expand. The partially expanded materials are then combined in the presence of a carbon-Michael reaction catalyst to form a reaction mixture which is cured to form the polymer foam.

Procédé de fabrication d'un produit cellulaire rigide réticulé à base de polychlorure de vinyle

Fabrics with flame protection function.

Die Erfindung betrifft Flammschutz-Schaumbeschichtungen für textile Flächen-Produkte, wobei die Beschichtungen plättchenförmigen Blähgraphit mit einem mittleren Durchmesser von mindestens 0,5 mm, mindestens ein Bindemittel und mindestens einen Schaumstabilisator umfassen sowie Verfahren zu deren Herstellung, deren Verwendung zur Herstellung von textilen Flächenprodukten sowie textile Flächenprodukte mit solchen Flammschutz-Schaumbeschichtungen.

A method for producing a foamed granules and its use.

Die Erfindung betrifft ein Verfahren, bei dem eine Polyesterschmelze enthaltend einen oder mehrere Polyester hergestellt wird, die Polyesterschmelze durch ein Treibmittel geschäumt wird und aus der geschäumten Polyesterschmelze ein geschäumtes Granulat hergestellt wird. Die intrinsische Viskosität (IV) der Polyesterschmelze wird dabei durch das Treibmittel um mindestens 0.05 dl/g, gemessen nach ASTM D4603, reduziert und die IV des geschäumten Granulats wird danach mittels einer Festphasenpolykondensation (SSP) erhöht.

METHOD OF FORMING SHOE SOLE FROM A VULCANIZED FOAM RUBBER AND CORRESPONDING SHOE SOLE FROM A VULCANIZED FOAM RUBBER

Modified silicone resin foamed body

Highly crystalline and frothed polyolefin foam

HIGH INTERNAL PHASE EMULSION FOAM HAVING CELLULOSE NANOPARTICLES

Cold-soft polyurethane formulation

PNEUMATIC VEHICLE OF WHICH THE TREAD COMPRISES A RUBBER COMPOSITION THERMALLY EXPANDABLE

CROSSLINKED ELASTOMER COMPOSITION, AND PRODUCT COMPRISING THE SAME

METHOD OF PREPARATION OF FOAM CONTAINING POLYOLEFIN

HEAT EXPANDABLE RUBBER COMPOSITION AND TIRE WITH COMPONENT THEREOF

Composition de caoutchouc thermo-expansible, utilisable notamment en bande de roulement de pneumatique, comportant au moins : - un élastomère diénique ; - une charge renforçante ; - entre 2 et 25 pce d'un agent d'expansion ; - entre 2 et 25 pce d'un acide carboxylique dont la température de fusion est comprise entre 60°C et 220°C ; - un système de réticulation à base de soufre et de 5 à 15 pce d'un accélérateur de vulcanisation ; - le ratio pondéral (acide carboxylique / accélérateur) étant inférieur à 2,0. Procédé d'obtention d'une telle composition et pneumatique la comportant. Cette composition permet de réduire le bruit de roulage des pneumatiques sans pénaliser leur résistance au roulement.

미세발포성 나노복합체 및 이의 제조방법

... 본 발명은 고분자 탄성체, 나노충진제, 적어도 2종의 양친성 분산제, 화학발포제, 발포 촉진제, 및 가교제를 포함하는 미세발포성 나노복합체(microcellular foaming nanocomposite) 및 이의 제조방법에 관한 것이다.

카르벤-유형 촉매의 존재 하에서 탈수소 축합 반응에 의해 가교될 수 있는 실리콘 조성물

... 본 발명은 ≡SiH/≡SiOH 기를 가진 성분들을 포함하는 실리콘 조성물에 관한 것으로, 상기 조성물은 용액 형태 카르벤-유형 촉매의 존재 하에서 탈수소 축합 반응을 통해 중합/가교될 수 있다.

COMPOSITIONS FOR HEAT-RECOVERABLE FOAM TUBING

Provided is a melt composition for a heat shrinkable foam structure that includes at least one base polymer and a blowing agent made from at least one heat-activated chemical compound encapsulated by a plurality of polymeric shells. The melt composition may also include a crosslinking promoter or other additives. Also provided is a method for making a heat- shrinkable polymer foam tubing. A melt composition containing at least one base polymer material having a melt temperature and a blowing agent having an activation temperature is provided. The melt composition is mixed at an elevated temperature. The melt composition is then extruded through a die at a high temperature. The extruded foam tube is then processed, often heat-processed. Additionally provided is a heat shrinkable foamed polymer tube containing an inner layer and an outer layer of an extruded foamed polymer tube, where each layer is made from at least one base polymer and a blowing agent and the blowing agent includes a heat-activated ...

포말화된 퍼옥사이드 개질된 선형 저밀도 폴리에틸렌 조성물, 및 그 포말화된 조성물의 제조 방법

... 포말성 중합체 조성물은 퍼옥사이드와 선형 저밀도 폴리에틸렌의 반응 생성물 및 발포제를 포함하는 퍼옥사이드-개질된 선형 저밀도 폴리에틸렌을 포함한다. 퍼옥사이드-개질된 선형 저밀도 폴리에틸렌은 열가소성이다. 이러한 포말성 중합체 조성물로부터 제조된 포말화된 중합체 조성물과 이러한 포말화된 중합체 조성물을 제조하기 위한 방법을 또한 개시한다. 본원에 기재된 포말화된 중합체 조성물은 다양한 제조 물품, 특히 와이어 및 케이블 산업 분야에서 사용하기에 적합하다.

촉매 수지

... (a) 모노비닐 방향족 모노머, 멀티비닐 방향족 모노머, 및 포로겐(porogen)을 포함하는 반응 혼합물을 제공하는 단계, (b) 상기 반응 혼합물 상에 수성 현탁 중합을 수행하여 수지 비드를 형성하는 단계, 및 (c) 상기 수지 비드를 술폰화하는 단계를 포함하는 복수의 수지 비드를 제조하는 방법이다. 또한 복수의 수지 비드가 제공되는데, 상기 수지 비드는 모노비닐 방향족 모노머의 중합된 단위 및 멀티비닐 방향족 모노머의 중합된 단위를 포함하고, 상기 수지 비드는 15 내지 38 ㎡/g의 BET 표면적 및 0.7 이상의 용적 용량을 가진다. 또한 하나 이상의 반응물의 화학적 반응의 생성물을 제조하는 방법이 제공되는데, 상기 방법은 상기 하나 이상의 반응물을 상기 복수의 수지 비드의 존재에서 서로 반응시키는 단계를 포함한다.

우레아 유도체를 포함하는 열 팽창성 조성물

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

신발창, 조성물, 및 이들의 제조 방법

... 신발창 조성물 및 신발창의 제조 방법이 제공된다. 상기 신발창은, 0.50 g/cm3 미만의 밀도를 갖는 발포된 실란-가교결합된 폴리올레핀 엘라스토머를 포함하는 조성물을 포함한다. 상기 신발창은 ASTM D 395 (6 시간 @ 50℃)에 따라 측정시 약 5.0 % 내지 약 20.0 %의 압축 변형을 나타낸다. 상기 실란-그래프팅된 폴리올레핀 엘라스토머는, 밀도가 0.86 g/cm3 미만인 제 1 폴리올레핀, 결정화도가 40 % 미만인 제 2 폴리올레핀, 실란 가교결합제, 그래프팅 개시제, 축합 촉매 및 발포제를 포함하는 블렌드로부터 제조될 수 있다.

균형화된 변형 경화, 용융 강도, 및 전단 박화를 갖는 폴리프로필렌

... 50 몰% 이상의 프로필렌을 포함하고, 6 초과의 분자량 분포(Mw/Mn), 0.97 이상의 분지화 지수(g'vis), 및 190℃에서 신장형 레오미터를 사용하여 결정되는 10 cN 초과의 용융 강도를 갖는 폴리프로필렌; 및 폴리프로필렌 및 유기 과산화물의 중량 기준으로 0.01 내지 3 중량%의 1종 이상의 유기 과산화물의 반응 생성물을 포함하는 조성물. 이러한 과분지화 폴리프로필렌은 필름, 발포된 물품, 및 열성형 물품에서 유용하다.

에틸렌/알파-올레핀의 인터폴리머로부터 제조된 가교된 발포체

... 발포체 조성물은 적어도 에틸렌/α-올레핀 인터폴리머를 포함한다. 본 개시내용의 에틸렌/α-올레핀 인터폴리머는 적어도 1종의 연질 블록 및 적어도 1종의 경질 블록을 포함하는 멀티-블록 코폴리머이다. 발포체 조성물은 발포제 및 가교제를 추가로 포함할 수 있다. 발포체 조성물의 제조 방법 및 발포체 조성물로 제조된 발포 물품이 또한 기재된다.

열 팽창성 제형

... 본 명세서는 하기를 포함하는 열 팽창성 제형에 관한 것이다: (a) 비닐 아세테이트, (메트)아크릴산 및 이의 유도체로부터 선택되는 하나 이상의 단량체 단위를 함유하는 하나 이상의 과산화적 가교성 이원 공중합체, 상기 이원 공중합체는 190 ℃ 의 시험 온도 및 2.16 kg 의 시험 로드와 함께 DIN EN ISO 1133 에 따라 측정되는 3 g/10분 이하의 용융 흐름 지수를 가짐; (b) 하나 이상의 과산화물; (c) 하나 이상의 화학적 취입제; (d) 하나 이상의 디엔 단량체 기반의 하나 이상의 중합체; 및 (e) 단일 또는 다중 불포화 탄화수소로부터 선택되는 하나 이상의 제 1 단량체 및 (메트)아크릴산 및 이의 유도체로부터 선택되는 하나 이상의 제 2 단량체 기반의 하나 이상의 삼원중합체.

3D PRINTING OF COMPOSITION-CONTROLLED COPOLYMERS

CLOSED-CELL FOAMED RUBBER-BASED RESIN OBJECT

A closed-cell foamed rubber-based resin object that comprises a rubber-based resin portion which has an acrylonitrile component content of 30 mass% or higher and which contains carbon black, wherein the carbon black has a total nitrogen-adsorption specific surface area of 600-2,400 m2 per 100 parts by mass of the rubber-based resin.

METHOD FOR PRODUCING POROUS EPOXY RESIN SHEET

Provided is a porous epoxy resin sheet produced by cutting a cured epoxy resin body to a predetermined thickness, the porous epoxy resin sheet having a large surface area and a uniform in-plane pore size distribution. A method for producing a porous epoxy resin sheet by forming a cylindrical or columnar cured resin body from a resin mixture containing an epoxy resin, a curing agent, and porogen, cutting the surface of the cured resin body at a predetermined thickness to make an epoxy resin sheet, and then removing the porogen to render the sheet porous, is characterized in that when the cured resin body is formed from the resin mixture, curing is performed in a state where the viscosity of the mixture is at least 1,000 mPa·s.

THERMOSET FOAM SHEET AND MANUFACTURING METHOD THEREFOR

The present invention pertains to a thermoset foam sheet characterized by comprising a composition containing a blowing agent, a vulcanizing agent, and an unvulcanized diene rubber. Said thermoset foam sheet is further characterized in that at least part of the surface thereof is exposed to electromagnetic radiation and said part of the surface is cured. The present invention makes it possible to provide a thermoset foam sheet that exhibits less or no exudation of components, such as the vulcanizing agent, onto the surface, even if the sheet is stored for a long period of time.

THERMOPLASTIC RESIN FOAM AND FOAM SEALANT

The purpose of the present invention is to provide a thermoplastic resin foam and a foam sealant that enable indentations to be sufficiently and rapidly restored. The thermoplastic resin foam is characterized in that the indentation recovery rate defined below is at least 50%, and the foam sealant is characterized by containing the thermoplastic resin foam (in particular, it is preferable an adhesive layer positioned on one or both sides of the thermoplastic resin foam be provided). Indentation recovery rate: After compressing the thermoplastic resin foam at 23°C with a jig having a 90 degree blade angle to the lowest point in the thickness direction of the foam for 15 seconds, and then releasing the compressed state, the indentation recovery rate is the ratio of the thickness of the indented portion with respect to the initial thickness 60 seconds after the compressed state has been released.

Methods of producing foam structures from recycled metallized polyolefin material

A physically crosslinked, closed cell continuous foam structure derived from recycled metallized polyolefin material; polypropylene, polyethylene, or combinations thereof, a crosslinking agent, and a chemical blowing agent is obtained. The foam structure is obtained by extruding a structure comprising a foam composition, irradiating the extruded structure with ionizing radiation, and continuously foaming the irradiated structure.

Method of Preparing Superabsorbent Polymer

Provided is a method of preparing a superabsorbent polymer. More specifically, provided is a method of preparing a superabsorbent polymer capable of exhibiting improved initial absorbency and a rapid absorption rate by polymerizing monomers having acidic groups, of which part is neutralized with a basic material including potassium hydroxide, in the presence of an encapsulated foaming agent.

Expansion system for flexible insulation foams

A flexible material for thermal and acoustical insulation comprising an expanded polymer (blend) based on at least one elastomer, wherein expansion is achieved by decomposition of a mixture of at least two chemical blowing agents, comprising the exothermic chemical blowing agent 4,4′-Oxybis(benzenesulfonyl hydrazide) (OBSH) and at least one endothermic blowing agent.

FOAMED SHEET

... where the impact absorption rate a is an impact absorption rate (%) of a test piece A and the impact absorption rate b (%) after high-temperature compression is an impact absorption rate (%) acquired by storing the test piece A at 80° C. for 72 hours in the state of being compressed by 60% with respect to the initial thickness of the test piece A, thereafter releasing the compression state, and thereafter conducting measurement after a lapse of 24 hours at 23° C.

Complex, Preparation Methods and Application Thereof

The invention is directed to a complex, including: a porous composite carrier including: a porous organic foam material containing open pores, each pore comprising a wall defining the pore; and a crosslinked product having aldehyde groups and immobilized on the surface of the walls of one or more pores of the porous organic foam materials, and a protein, polypeptide, or oligopeptide immobilized onto the porous composite carrier through a reaction between an amino group of the protein, polypeptide or oligopeptide and an aldehyde group of the composite carrier. The immobilized product has high specific surface area and high specific activity. The immobilization is simple and in low cost, and is suitable for industrial application.

Sealing material and method of foaming application thereof

The method of foaming and applying a sealing material is characterized by comprising the steps of hot-melting the sealing material; mixing nitrogen gas into the melted sealing material under a predefined pressurization; discharging the resultant mixture at a predefined pressure into the air to thus foam the mixture and simultaneously apply it to a place necessary to seal, thus making a sealing foam; and curing this sealing foam by ultraviolet rays. By this method, the sealing material does not involve flowing after applied, and shows an excellent sealing performance even under severe heat resistance conditions, and also can make good independent cells inside even when used in a foamed condition.

METHOD FOR PRODUCING FOAM-MOLDED ARTICLE, AND FOAM-MOLDED ARTICLE

Even when a mixture resin of virgin resin and recovered resin material is used as a resin material for molding, a stable, high-quality foam-molded article with excellent impact resistance is produced at low cost. For this, the resin material that is used includes a mixture resin of recovered resin material obtained by pulverizing a resin material solidified after melting, and virgin resin without thermal history of melting, and a foaming agent added to the mixture resin. The resin material is a mixture of a polypropylene-based resin and a polyethylene-based elastomer.

POLYURETHANE FOAMS HAVING REDUCED ALDEHYDE EMISSIONS

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, at least one aminoalcohol compound and least one antioxidant. Foams so produced emit low levels of both formaldehyde and acetaldehyde.

Polyimide aerogels with reduced shrinkage from isothermal aging

A polyimide aerogel and method of making the aerogel is disclosed. The polymer backbone of the aerogel includes a cardo-diamine. The disclosed polyimide aerogel is less susceptible to temperature induced shrinkage than a polyimide aerogel that does not include a cardo-diamine.

RUBBER-BASED RESIN CLOSED-CELL FOAM SHEET AND MANUFACTURING METHOD THEREFOR

The present invention provides a rubber-based resin closed-cell foam sheet with its sealing capability being unlikely to be lowered even for a prolonged period of use, and with its excellent waterproofing capability. The inventive rubber-based resin closed-cell foam sheet is characterized in that the foam sheet includes a rubber-based resin containing a nitrile group, and exhibits an excellent adhesion. When used as a waterproof sealing material, the foam sheet can adhere, in a tightly close contact, to the interface of a portion to be sealed. Therefore, the inventive rubber-based resin closed-cell foam sheet can be advantageously used as a waterproof sealing material having high sealing capability and excellent waterproofing capability.

LOW ODOR HEAT-EXPANDABLE MATERIALS

ПОЛИМЕТАКРИЛИМИДНЫЕ (PMI) ПЕНОПЛАСТЫ С УЛУЧШЕННЫМИ МЕХАНИЧЕСКИМИ СВОЙСТВАМИ, В ЧАСТНОСТИ С ПОВЫШЕННЫМ УДЛИНЕНИЕМ ПРИ РАЗРЫВЕ

Изобретение относится к составам для получения полиметакрилимидных пенопластов (PMI-пенопластов), используемых в формованных изделиях, в частности в трубах, громкоговорителях, антеннах, рентгеновских столах, деталях машин, автотранспортных средствах, рельсовых транспортных средствах, плавучих, воздушных и космических транспортных средствах. Описан способ получения вспениваемых сшитых полимеров, характеризующийся тем, что полимеризации подвергают смесь, содержащую (мет)акриловую кислоту, (мет)акрилонитрил и сложный диэфир (мет)акриловой кислоты полиэтиленгликоля, где полиэтиленгликоль имеет молекулярный вес по меньшей мере 250 г/моль, в присутствии вспенивающего агента и возбудителей полимеризации при температуре от 150 до 250°С. Описаны также поли(мет)акрилимидный пенопласт, слоистый материал и формованная деталь. Технический результат - высокое удлинение при разрыве в температурном диапазоне -60°С до 200°С в сочетании с заметно улучшенными механическими свойствами. 4 н. и 4 з.п. ф-лы, ...

ОРГАНИЧЕСКИЕ КСЕРОГЕЛИ С ПОНИЖЕННОЙ ПЛОТНОСТЬЮ НА ОСНОВЕ ИЗОЦИАНАТОВ

Настоящее изобретение относится к способу синтеза органического ксерогеля на основе изоцианатов, применяемому для получения пенопластов и изготовления композиционных материалов. Способ включает следующие стадии: а) получение полиизоцианатной композиции, b) необязательное получение композиции, реагирующей с изоцианатными группами, с) необязательное получение по меньшей мере одного каталитического соединения, способствующего образованию полиизоцианурата, d) получение органической нереакционноспособной композиции растворителя, е) необязательное получение дополнительных добавок, f) объединение композиций/соединений а), d) и необязательно b), и/или c), и/или е) с образованием геля и g) необязательное удаление непрореагировавших молекул, h) замена органического растворителя водой, i) сушка пористой сетки в докритических условиях с целью удаления воды и получения органического ксерогеля. Способ позволяет избежать или значительно снизить усадку геля во время удаления растворителя, в результате ...

КОМПОЗИЦИЯ ПОЛИПРОПИЛЕНА, ПОДХОДЯЩАЯ ДЛЯ ВСПЕНЕННЫХ ЛИСТОВЫХ МАТЕРИАЛОВ И ИЗДЕЛИЙ

Изобретение относится к композиции полипропилена, предназначенной для получения вспененного материала. Композиция содержит (a) от 85,0 до 99,90 частей по массе полипропилена с высокой прочностью расплава (HMS-PP) и (b) от 0,10 до 5,0 частей по массе талька в качестве нуклеирующего агента с размером частиц d50 в пределах от 5 μм до 15 μм, определенным с помощью анализа методом осаждения; (c) необязательно от 1 до 20 частей по массе дополнительного полипропилена с высокой прочностью расплава (HMS-PP'). При этом общее количество полипропилена с высокой прочностью расплава (HMS-PP) составляет по меньшей мере 85 мас.% от общей массы композиции полипропилена. HMS-PP представляет собой линейный гомополимер пропилена, который химически модифицирован бифункциональным(и) ненасыщенным(и) мономером(ами) и/или мультифункциональным(и) ненасыщенным(и) с низкомолекулярной массой полимером(ами), при этом мультифункциональный ненасыщенный с низкомолекулярной массой полимер(ы) имеет среднечисловую молекулярную ...

КОМПОЗИЦИЯ ДЛЯ ОБОЛОЧКИ КАБЕЛЯ, ОБОЛОЧКА КАБЕЛЯ И КАБЕЛЬ, НАПРИМЕР, КАБЕЛЬ ПИТАНИЯ ИЛИ КАБЕЛЬ СВЯЗИ

Настоящее изобретение относится к композиции оболочки кабеля, способу получения кабеля, оболочке кабеля и кабелю, например кабелю низкого напряжения или кабелю питания, или коммуникационному кабелю связи. Композиция оболочки кабеля содержит смесь расширяющейся и сшиваемой оболочки из композиции полимера, содержащего полиолефиновый материал, где полиолефиновый материал несет силановые фрагменты, и вспенивающую систему. Смесь оболочки содержит по меньшей мере 0,1% по массе и не более 1% по массе вспенивающего агента от общей массы полиолефинового материала. Изобретение обеспечивает получение оболочки кабеля, которая легко удаляется и имеет повышенную гибкость. 5 н. и 10 з.п. ф-лы, 1 ил, 1 табл.

ЗВУКОДЕМПФИРУЮЩАЯ КОМПОЗИЦИЯ

РЕЗИНОВАЯ СМЕСЬ, ВУЛКАНИЗИРОВАННАЯ РЕЗИНА И ШИНА, ИЗГОТОВЛЕННАЯ С ИХ ИСПОЛЬЗОВАНИЕМ

... 1. Резиновая смесь, включающая каучуковый компонент; и волокно, выполненное из гидрофильной смолы, в которой волокно сформировано слоем покрытия на его поверхности, слой покрытия выполнен из смолы, имеющей сродство к каучуковому компоненту.2. Резиновая смесь, включающая каучуковый компонент; и гидрофильную смолу, в которой резиновая смесь включает комплекс, комплекс сформированный нанесением покрытия, по меньшей мере, на часть гидрофильной смолы, смолы, имеющей сродство к каучуковому компоненту, так что в комплексе формируется полость.3. Резиновая смесь по п.2, дополнительно включающая пенообразователь, в которойрезиновая смесь, включающая пенообразователь вспенивается перемешиванием и вулканизацией, исмола, имеющая сродство к каучуковому компоненту является смолой с низкой температурой плавления, температурой плавления ниже, чем максимальная температура вулканизации.4. Резиновая смесь по п.2, в которой по всей окружности гидрофильная смола покрыта смолой, имеющей сродство к каучуковому ...

ПОЛИФУНКЦИОНАЛЬНЫЕ СПИРТЫ В КАЧЕСТВЕ СШИВАЮЩИХ СРЕДСТВ В PMI-ПЕНОМАТЕРИАЛАХ

СПОСОБ ИЗГОТОВЛЕНИЯ ЖЕСТКИХ ВСПЕНЕННЫХ ИЗДЕЛИЙ, ИЗГОТОВЛЕННЫХ ИЗ ПОЛИМЕРНЫХ МАТЕРИАЛОВ

НЕИЗОЦИАНАТНЫЕ ЖЕСТКИЕ ПОЛИМЕРНЫЕ ПЕНЫ, ПОЛУЧАЕМЫЕ ПО РЕАКЦИИ ПРИСОЕДИНЕНИЯ УГЛЕРОДА ПО МИХАЭЛЮ, И СПОСОБ ПЕНООБРАЗОВАНИЯ

... 1. Способ изготовления полимерной пены, включающий в себя стадииполучения, по меньшей мере, частично вспененной реакционной смеси смешением при температуре, по меньшей мере, 10˚C (1) многофункционального акцептора в реакции Михаэля, который содержит множество в расчете на одну молекулу являющихся акцепторами в реакции Михаэля функциональных групп, с (2) многофункциональным донором углерода в реакции Михаэля в присутствии (3) поверхностно-активного вещества, (4) катализатора реакции присоединения углерода по Михаэлю и (5) композиции вспенивающего реагента, содержащей вспенивающий реагент, температура кипения которого находится в диапазоне от -40˚C до +100˚C,дозирования частично вспененной реакционной смеси иотверждения дозированной реакционной смеси для получения полимерной пены,где, по меньшей мере, частично вспененную реакционную смесь готовят путем(a) получения находящегося под давлением компонента А, содержащего многофункциональный акцептор в реакции Михаэля и растворенную в компоненте ...

VERFAHREN ZUM FORMEN VON KUNSTHARZSCHAUMPELLETS AUS POLYOLEFIN IN EINER FORM

Kautschukzusammensetzung für Reifenlauffläche, Verfahren zum Herstellen der Kautschukzusammensetzung, vulkanisiertes Produkt und dessen Verwendung in einem Laufflächenabschnitt

Kautschukzusammensetzung für eine Reifenlauffläche, umfassend:einen Dienkautschuk, von 1 bis 20 Gewichtsteile einer fräsbaren Silikonkautschukverbindung und von 0,2 bis 20 Gewichtsteile einer thermisch expandierbaren Mikrokapsel, pro 100 Gewichtsteile des Dienkautschuks, wobei die fräsbare Silikonkautschukverbindung Silica enthält, eine durchschnittliche Glasübergangstemperatur des Dienkautschuks bei -50 °C oder niedriger liegt und eine Kautschukhärte der fräsbaren Silikonkautschukverbindung von 10 bis 50 beträgt.

Luftreifen

Luftreifen (1), der ein Links-Rechts-Paar Reifenwulstabschnitte (2), einen mit den Reifenwulstabschnitten (2) kontinuierlichen Seitenwandabschnitt (3) und einen Laufflächenabschnitt (4), der mit dem Seitenwandabschnitt (3) verbunden ist, eine Karkassenschicht (5), die zwischen den linken und rechten Reifenwulstabschnitten (2) angeordnet ist, aufweist, wobeieine Schaumkautschukschicht (6), die in Reifenradialrichtung verläuft, in mindestens einem Abschnitt des Seitenwandabschnitts (3) angeordnet ist, unddie Wärmeleitfähigkeit bei 23 °C der Schaumkautschukschicht (6) von 0,05 bis 0,20 W/mK beträgt;gekennzeichnet dadurch, dassein tanδ bei 60 °C der Schaumkautschukschicht (6) nicht mehr als 0,17 beträgt und ein Expansionsverhältnis Q, wie in Formel (I) unten definiert, von 50 bis 160 % beträgt:wobei D0 ein spezifisches Gewicht der Schaumkautschukschicht (6) vor dem Aufschäumen ist und D1 ein spezifisches Gewicht nach dem Aufschäumen ist, unddass die Schaumkautschukschicht (6) aus einer schäumenden ...

Improvements in and relating to expanded rubber articles

Polymer process

Foamed latex products

Sponge rubber articles are manufactured from foamed rubber latex containing zinc oxide and a delayed-action gelling agent by gelling the foamed latex in the presence of an organic hydroxy compound which contains the hydroxyl group in a carbocyclic nucleus in an amount producing an increase in the gelling pH of the system of the order of 0.3 pH unit or more. The hydroxy compound may be phenol, alpha-naphthol, beta-naphthol, p-nitroso-phenol, 2-naphthol-1-sulphonic acid, 2-naphthol-3-sulphonic acid, cyclohexanol, methyl cyclohexanol and hydroquinone, and they may be used in a quantity of up to 5 per cent, and preferably 0.5 to 2.0 per cent based on the dry weight of rubber. In examples, an electro-decanted latex or a latex preserved with sodium pentachlorphenate was matured in the presence of zinc diethyl dithiocarbamate, mercaptobenzthiazole and a water-soluble soap and then alpha-or beta-naphthol or cyclohexanol added and then zinc oxide and finally sodium silicofluoride to produce gelling ...

MANUFACTURE OF CROSSLINKED FOAMABLE MOULDINGS FROM OLEFIN POLYMERS

FOAM MATERIAL SYSTEMS, KITS AND THEIR USE

PROCEDURE FOR THE PRODUCTION INTERLACED PVC OF A FOAM MATERIAL BODY

ZUSAMMENSETZUGEN FOR HEATRESET-CASH FOAM MATERIAL HOSES

FOAM-CASH MIXTURES

Shoe sole member and shoe

Provided is a shoe sole member that is fully or partially formed by a crosslinked foam, wherein the crosslinked foam demonstrates particular measurement results from pulsed NMR.

POLYOLEFIN ELASTOMER COMPOSITIONS AND METHODS OF MAKING THE SAME

An elastomeric article is provided that includes a composition having a silane-crosslinked polyolefin elastomer with a density less than 0.90 g/cm3. The elastomeric article can exhibit a compression set of from about 5.0 % to about 35.0 %, as measured according to ASTM D 395 (22 hrs P 70 °C). The silane-crosslinked polyolefin elastomer can include a first polyolefin having a density less than 0.86 g/cm3, a second polyolefin having a crystallinity less than 40 %, a silane crosslinker, a grafting initiator, and a condensation catalyst.

THERMALLY EXPANDABLE COMPOSITIONS

The present application relates to a thermally expandable composition, which contains at least one peroxide cross-linking polymer, which does not contain glycidyl methacrylate as a polymerized monomer, contains at least one polymer which is polymerized with glycidyl methacrylate as a monomer to a portion of 2 to 20 wt.% relative to the respective polymer, contains at least one peroxide and at least one endothermic chemical blowing agent, moulded bodies containing said composition, and a method for sealing and filling cavities in components in order to reinforce or stiffen components, in particular, hollow components, and for the bonding of movable components using such a moulded body.

METHOD FOR PREPARING EXTRUDED POLYAMIDE FOAMS

A continuous method of producing polyamide foams by an extrusion foaming process is disclosed. The polyamide foam includes a polyamide resin compounded with a composite chain extender including an epoxy chain extender and a maleic anhydride grafted polypropylene (MAPP) wax. The produced polyamide foams have improved properties, including a smooth surface, low density, and small cell size.

FOAMABLE, INSULATING-LAYER-FORMING MULTI-COMPONENT COMPOSITION AND USE OF THE SAME

Disclosed is a foamable multicomponent composition which forms an insulation layer, said composition comprising: at least one alkoxysilane-functional polymer having along the polymer chain alkoxy-functional silane terminal and/or side groups of general formula (I) -Si(R1)m(OR2)3-m (I), in which R1 represents a linear or branched C1-C16 alkyl group, R2 represents a linear or branched C1-C6 alkyl group and m represents a whole number between 0 and 2; at least one fire retardant additive which forms an insulation layer; a blowing agent mixture; and comprising a cross-linking agent. Also disclosed is the use of said composition as an in-situ foam or for producing moulded bodies.

COLD FLEXIBLE POLYURETHANE FORMULATION

The invention relates to a method for producing a cold flexible polyurethane insulation in which (a) polyisocyanates are mixed with (b) compounds with groups which are reactive towards isocyanates, (c) propellants, (d) catalysts, (e) plasticizers and optionally (f) other additives in order to form a reaction mixture, which is applied onto a surface and is cured in order to form an insulation. The compounds with groups (b) which are reactive towards isocyanates contain at least one polyetherol (b1) with a nominal functionality of 4 or more, a content of propylene oxide, based on the total weight of alkylene oxide in the polyetherol (b1), of more than 60 wt.%, and an OH number of at least 300 mg KOH/g, at least one polyetherol (b2) with a nominal functionality of 3.5 or less, a content of prim. OH groups of more than 50%, and an OH number of less than 300 mg KOH/g, at least one polyesterol (b3), and chain extenders and/or crosslinking agents (b4). The invention additionally relates to a polyurethane ...

SYSTEM AND METHOD FOR PRODUCING IN-SITU FOAM

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

METHOD OF MAKING A FOAM

A method of making a foam comprising the following steps. A mixture is created comprising (i) a first reactant comprising triglyceride having acrylate functionality, (ii) a second reactant comprising diacrylate, and (iii) a blowing agent. The mixture is expanded to create a froth. The first and second reactants of the froth are reacted to create the foam.

TEXTILE, SHOWING FIRE-PROOFING FUNCTION

PRODUCTION OF VODOABSORBIRUYuShchIKh POLYMER PARTICLES WITH APPLICATION OF CARBONATE FOAMING AND BAND DRYING

Antimicrobial foam

A resilient foam material having an active antimicrobial bound to, incorporated within, and projecting from its surface is provided for incapacitating or destroying microbes. The antimicrobial has an atomic structure that is capable of mechanically piercing or lysing a microbe thereby incapacitating or destroying the microbe. The resilient antimicrobial foam material may be manufactured into a resilient antimicrobial foam product for drawing across a surface and mechanically incapacitating or destroying microbes on the surface. The resilient antimicrobial foam material may be manufactured into a membrane for providing a sterile barrier for a surface. The resilient antimicrobial foam material is manufactured by combining the antimicrobial with a foam polymer material, heating the foam polymer material under pressure to a temperate that does not deactivate the antimicrobial, incorporating a blowing agent, cooling the material, and extruding the material.

Crosslinked Flame Retardant Thermoplastic Elastomer Gels

Crosslinked flame retardant thermoplastic elastomer gels are provided. The crosslinked flame retardant thermoplastic elastomer gels comprise a char catalyst, a char former, a maleic anhydride-modified styrene ethylene/butylene styrene polymer, and a softener oil. Methods are provided of making crosslinked flame retardant thermoplastic elastomer gels.

Process for texturing materials

Provided are methods for making textured implantable materials made from two part RTV silicone foams and having a desired color or tone without the need for dyes or colorants.

Polyvinyl-Amine Acid Gas Adsorption-Desorption Polymers, Processes for Preparing Same, and Uses Thereof

This disclosure involves an adsorption-desorption material, e.g., crosslinked polyvinyl-amine material having an M w from about 500 to about 1×10 6 , total pore volume from about 0.2 cc/g to about 2.0 cc/g, and a CO 2 adsorption capacity of at least about 0.2 millimoles per gram of crosslinked material, and/or linear polyvinyl-amine material having an M w from about 160 to about 1×10 6 , total pore volume from about 0.2 cc/g to about 2.0 cc/g, and a CO 2 adsorption capacity of at least about 0.2 millimoles per gram of linear material. This disclosure also involves processes for preparing the crosslinked polyvinyl-amine materials and linear polyvinyl-amine materials, as well as selective removal of CO 2 and/or other acid gases from a gaseous stream using the polyvinyl-amine materials.

Resin foam and process for producing the same

Provided is a resin foam which has satisfactory strain recovery, is particularly resistant to shrinkage of its cell structure caused by the resinous restitutive force at high temperatures, and exhibits superior high-temperature strain recovery. The resin foam according to the present invention is obtained from a resin composition including an elastomer and an active-energy-ray-curable compound. The resin composition gives an unfoamed measurement sample having a glass transition temperature of 30° C. or lower and a storage elastic modulus (E′) at 20° C. of 1.0×10 7 Pa or more, each determined by a dynamic viscoelastic measurement.

Crosslinked organic porous particles

Crosslinked organic porous particles are non-swellable in propyl acetate and have a crosslinked organic solid phase and discrete pores dispersed within the crosslinked organic solid phase, which discrete pores are isolated from each other. The discrete pores have an average size greater than or equal to 0.1 μm and the crosslinked organic porous particles have a mode particle size of at least 3 μm and up to and including 100 μm. The discrete pores can contain a marker material.

Thermally foamable resin composition, thermally foamable resin sheet, foam, and production method thereof

A thermally foamable resin composition includes a base resin, foamable resin particles, and a cross-linking agent, wherein each of the foamable resin particles contains a solid resin and a thermally expandable substance contained in the solid resin.

Propylene-based copolymer, propylene-based copolymer composition, molded product thereof and foamed product thereof, and production process therefor

To provide a propylene-based copolymer and a propylene-based copolymer composition, each of which has a high melt tension because it has a long-chain branched structure, exhibits excellent molding processability during molding, such as inflation molding, extrusion molding, blow molding, injection molding or vacuum forming, and is capable of favorably providing a foamed product having an excellent expansion ratio and excellent cell uniformity in the foaming stage. The propylene-based copolymer (A) of the present invention comprises 50 to 95% by mol of constituent units [i] derived from propylene, 4.9 to 49.9% by mol of constituent units [ii] derived from an α-olefin of 2 to 10 carbon atoms other than propylene and 0.1 to 10% by mol of constituent units [iii] derived from a non-conjugated polyene (with the proviso that the total amount of the constituent units [i], [ii] and [iii] is 100% by mol), and is characterized by satisfying specific requirements (a) and (c).

Electret sheet

Provided is an electret having high piezoelectric properties. An electret sheet of the invention is characterized in that it comprises a synthetic resin sheet is electrified by injecting electric charges thereinto, that the synthetic resin sheet comprises two types of synthetic resins incompatible with each other, and that these synthetic resins form a phase separated structure and are cross-linked through a polyfunctional monomer. Therefore, positive and negative charges in an apparently polarized state are present in the interfacial portions between the two types of synthetic resins incompatible with each other. By applying an external force to the electret sheet to deform it, the relative positions of these positive and negative charges are changed, and these changes cause a favorable electrical response. Therefore, the electret sheet has high piezoelectric properties.

Foamed Silicone in Wound Care

The present invention relates to a silicone foam that is produced in-situ at a wound site, e.g. in a wound cavity, through a multi-component system, based on a physical foaming process, wherein the gas required to form the foam structure is provided through the blowing agent independently of the curing reaction of the polyorganosiloxane components of the multi-component system. Therefore, in accordance with the present invention, the blowing agent is provided as a distinct entity of the multi-component system that is, in particular, not the result of any chemical reaction taking place in the multi-component system. The present invention also relates to a device for producing the foam and the corresponding negative pressure wound therapy kit. 1. A multi-component system for producing a silicone foam , said system comprising: a first component comprising a first polyorganosiloxane , said first polyorgano-siloxane comprising at least two silicon-bonded hydrogen atoms;a second component comprising a second polyorganosiloxane, said second poly-organosiloxane comprising at least two alkenyl- and/or alkynyl groups, and at least one hydrosilylation catalyst; said multi-component system further comprising at least one blowing agent.3. The multi-component system according to claim 2 , wherein R10 and R9 is a C2-C3 alkenyl or C2-C3 alkynyl claim 2 , and wherein R1 and R2 claim 2 , independently claim 2 , are selected from monovalent or functionally substituted C4-C12 hydrocarbon group.4. The multi-component system according to claim 2 , wherein R1 and R2 are independently selected from the group consisting of C5-C12 aryl claim 2 , preferably phenyl or diphenyl claim 2 , C4-C12 alkyl claim 2 , C4-C12 alkenyl claim 2 , C4-C12 alkynyl claim 2 , and C4-C12 alkoxy.5. The multi-component system according to claim 2 , wherein R3 to R8 are independently selected from the group consisting of C1-C3 alkyl claim 2 , C2-C3 alkenyl claim 2 , C2-C3 alkynyl claim 2 , and C1-C3 alkoxy claim 2 ...

Silicone foam sheet and method of producing the same

Provided is a silicone foam sheet that expresses excellent bubble removability, that has satisfactory adhesiveness with an adherend and satisfactory sealability, that maintains the expression of these effects even when its thickness is reduced, that preferably expresses a stable modulus of elasticity over a region from a low-temperature region to a high-temperature region, and that suppresses both of its compression set in the low-temperature region and its compression set in the high-temperature region to low levels. Also provided is a method of producing such silicone foam sheet. The silicone foam sheet comprises an open-cell structure having a thickness of from 10 μm to 3,000 μm, wherein wherein an open-cell ratio is 90% or more, an average cell diameter of the silicone foam sheet is from 1 μm to 50 μm, and 90% or more of all cells therein has a cell diameter of 80 μm or less.

Phenolic resin foam board, and method for manufacturing same

The present invention is a phenolic resin foam board having a thickness of 40 mm or more to 300 mm or less, when the phenolic resin foam board is sliced into n pieces (n≧5) at approximately equal intervals of 8 mm or more to 10 mm or less, a density of an n-th specimen is d n , an average density of n pieces of specimens is d ave , a lowest density among the densities of n pieces of specimens is d min , 0≦(d ave −d min )/d ave ≦0.12 is established, and when values for D i =(d i +d (i+1) )/2 are calculated, D i values are plotted and points corresponding to the D i values are connected, resulting in a density distribution curve, no straight line parallel to the horizontal axis intersects the density distribution curve at four points.

Foamable particle and method of use

A physically crosslinked foamable particle comprises a polyolefin resin and a chemical foaming agent, the foamable particle having a volume of at least about 0.002 mm 3 .

Polymer foam and preparation method thereof

The present disclosure relates to a polymer foam and a preparation method thereof. The polymer foam is obtained by physically foaming a thermoplastic elastomer or a polyolefin material, and has an apparent density of 0.30 g/cm3 or less and a rebound degree of 50% or more as measured according to ASTM D2632.

METHOD FOR PHYSICALLY FOAMING A POLYMER MATERIAL AND FOAMED ARTICLE

The present disclosure relates to a method for physically foaming a polymer material and a foamed article. The method for physically foaming a polymer material comprises: (1) making a thermoplastic elastomer or a polyolefin material into a blank with an injector, an extruder, or a molding press; (2) subjecting the polyolefin blank to a crosslinking reaction to obtain a crosslinked polyolefin blank; (3) subjecting the thermoplastic elastomer blank or the crosslinked polyolefin blank to a high pressure impregnation with a supercritical fluid in an autoclave, then releasing the pressure to a normal pressure to obtain a supercritical fluid-impregnated blank; and (4) placing the supercritical fluid-impregnated blank into an end-product mold to perform an 1:1 in-mold foaming to obtain a finished foam article. 1. A method for physically foaming a polymer material , comprising:(1) making a thermoplastic elastomer or a polyolefin material into a thermoplastic elastomer blank or a polyolefin blank with an injector, an extruder, or a molding press;(2) subjecting the polyolefin blank to a crosslinking reaction to obtain a crosslinked polyolefin blank;(3) subjecting the thermoplastic elastomer blank or the crosslinked polyolefin blank to a high pressure impregnation with a supercritical fluid at a pressure of 10-50 MPa in an autoclave, then releasing the pressure to a normal pressure to obtain a supercritical fluid-impregnated blank; and(4) placing the supercritical fluid-impregnated blank into an end-product mold to perform an 1:1 in-mold foaming to obtain a finished foam article.2. The method according to claim 1 , wherein claim 1 , the thermoplastic elastomer comprises at least one of a thermoplastic polyurethane (TPU) claim 1 , a thermoplastic polyester elastomer (TPEE) claim 1 , and a polyether block amide elastomer (Pebax) claim 1 , or a mixture thereof.3. The method according to claim 1 , wherein claim 1 , the polyolefin material comprises at least one of poly(ethylene-co ...

FILM WITH VOID SPACES BONDED THROUGH CATALYSIS AND METHOD OF PRODUCING THE SAME

A film is provided with void spaces having a porous structure with less cracks and a high proportion of void space as well as having strength. The film with void spaces includes one kind or two or more kinds of structural units that form a structure with minute void spaces, wherein the structural units are chemically bonded through catalysis. For example, the abrasion resistance measured with BEMCOT® is in the range from 60% to 100%, and the folding endurance measured by the MIT test is 100 times or more. The film with void spaces can be produced by forming the precursor of the silicone porous body using sol containing pulverized products of a gelled silicon compound and then chemically bonding the pulverized products contained in the precursor of the silicone porous body. The chemical bond among the pulverized products is preferably a chemical crosslinking bond among the pulverized products. 1. A film with void spaces comprising:one kind or two or more kinds of structural units that form a structure with minute void spaces, whereinthe structural units are chemically bonded through catalysis.2. The film according to claim 1 , whereinthe chemical bond among the structural units includes a direct bond.3. The film according to claim 1 , whereinthe chemical bond among the structural units includes an indirect bond.4. The film according to claim 1 , whereinthe bond among the structural units includes a hydrogen bond or a covalent bond.5. The film according to claim 1 , whereinthe structural units are in the shape of at least one of a particle, fiber, and a plate.6. The film according to claim 5 , whereineach of the structural unit in the shape of a particle and the structural unit in the shape of a plate is made of an inorganic matter.7. The film according to claim 5 , whereina configuration element of the structural unit in the shape of a particle includes at least one element selected from the group consisting of Si, Mg, Al, Ti, Zn, and Zr.8. The film according to ...

RHEOLOGY MODIFICATION BY POROUS GEL PARTICLES

Modification of the rheology of a liquid medium, aqueous or nonaqueous, with polymers in the form of specific particles obtained by grinding (micronizing) a porous macrogel, itself prepared by a process comprising a radical polymerization step which comprises reacting in the presence of pore formers monomers containing monomers bearing at least two ethylenic unsaturations, typically in combination with monomers bearing a single ethylenic unsaturation; a polymerization initiator; and optionally a polymerization control agent. These polymer particles keep other particles in suspension within the liquid medium, and also the stabilized suspensions are obtained. 1. A method comprising adding crosslinked polymer particles (p) to a liquid medium , the crosslinked polymer particles (p) obtained by grinding a macrogel prepared by a process comprising a radical polymerization step (E) which comprises reacting , within a reaction medium M comprising pore formers: at least one radical polymerization initiator;', 'optionally at least one radical polymerization control agent, 'ethylenically unsaturated monomers, containing monomers m1 bearing at least two ethylenic unsaturations;'}to modify the rheology of said liquid medium.2. The method as claimed in claim 1 , wherein the monomers employed in step (E) comprise not only monomers m1 but also monomers m2 bearing a single ethylenic unsaturation claim 1 , preferably with a mass ratio m1/m2 of between 0.01 and 30.3. The method as claimed in claim 1 , wherein the liquid medium is an aqueous liquid medium.4. The method as claimed in claim 1 , wherein particles are kept in suspension within the liquid medium.5. The method as claimed in claim 1 , wherein the pore formers employed in step (E) are gas bubbles.6. The method as claimed in claim 1 , wherein step (E) first comprises a step (E1) in which only a part of the ethylenically unsaturated monomers are polymerized in the absence of pore formers claim 1 , then a step (E2) in which the ...

Shape Memory Products and Method For Making Them

A method for producing a heat-shrinkable product is provided. First, a polymer composition containing a polymer, a crosslinking agent and a micro-encapsulated foaming agent uniformly dispensed therein is melt mixed. The foaming agent has a peak activation temperature which is higher than a temperature of the melt mixing. Next, the polymer composition is injection molded into a molded product. This carried out at the peak activation temperature to activate the foaming agent. Then, the molded product is crosslinked within the mold. 1. A method for producing a shape memory product comprising the steps of:(i) melt mixing a polymer composition containing a polymer, a crosslinking agent and a micro-encapsulated foaming agent uniformly dispensed therein, the micro-encapsulated foaming agent having a peak activation temperature which is higher than a temperature of the melt mixing,(ii) injection molding the polymer composition into a molded product, the injection molding carried out at the peak activation temperature to activate the micro-encapsulated foaming agent; and(iii) crosslinking the molded product within a mold.2. The method according to claim 1 , wherein the micro-encapsulated foaming agent is a blowing agent.3. The method according to claim 2 , wherein the polymer composition includes a polyolefin.4. The method according to claim 3 , wherein the polymer composition further includes polyethylene.5. The method according to claim 4 , wherein the polymer composition further includes ethylene-vinyl acetate copolymer (EVA).6. The method according to claim 1 , wherein the polymer composition includes 40 to 60% by weight of polyethylene and 10 to 20% by weight of EVA.7. The method according to claim 1 , wherein injection molding is carried out at a temperature in a range of 120 to 160° C.8. The method according to claim 7 , wherein the mold is heated to a temperature in a range of 170 to 210° C.9. The method according to claim 8 , wherein the injection molding is carried ...

FOAM AND METHOD FOR PRODUCING SAME

[Problem] An object of the present invention is to provide a foam including a thermoplastic resin and rubber as a main component, in which a micronized product of a cellulose fiber is uniformly dispersed, and uniformity and mechanical properties are excellent. [Solution] A foam includes a modified cellulose fiber (A) covalently bonded with a diene-based polymer, a thermoplastic resin and/or rubber (B), and a diene-based polymer (C) having a functional group capable of covalently bonding with a cellulose fiber, in which the fiber (A) is micronized, the fiber (A) has a content of 0.05 to 20% by mass, and the thermoplastic resin and/or rubber (B) has a glass transition point of −130° C. to 120° C. 1. A foam comprising:a modified cellulose fiber (A) covalently bonded with a diene-based polymer;a thermoplastic resin and/or rubber (B); anda diene-based polymer (C) having a functional group capable of covalently bonding with a cellulose fiber, whereinthe fiber (A) is micronized,the fiber (A) has a content of 0.05 to 20% by mass, andthe thermoplastic resin and/or rubber (B) has a glass transition point of −130° C. to 120° C.2. The foam according to claim 1 , wherein the thermoplastic resin and/or rubber (B) is crosslinked.3. The foam according to claim 1 ,wherein a mass ratio is (A)/(B)/(C)=1/1.5 to 2000/0.001 to 0.5.4. A production method of a foam claim 1 , comprising the following steps:(step 1)a step of adjusting a concentration by diluting a masterbatch containing:a micronized modified cellulose fiber (A) covalently bonded with a diene-based polymer,a thermoplastic resin and/or rubber (B) having a glass transition point of −130° C. to 120° C., anda diene-based polymer (C) having a functional group capable of covalently bonding with a cellulose fiber,with the (B);(step 2)a step of adding a foaming agent and, as necessary, a crosslinking agent after (step 1); and(step 3)a step of performing foam molding or crosslinking foam molding after (step 2).5. The production method ...

Perfected self-modelling padding, garment or support comprising said self-modelling padding, and manufacturing method thereof

A self-modelling padding for garments or supports which has an elastomeric matrix having a cross-linked, three-dimensional open cell structure, and a self-modelling paste embedded in the elastomeric matrix is provided. The elastomeric matrix is configured to have a shape memory. The self-modelling paste has a plastic behavior.

ROOM TEMPERATURE FOR CROSSLINKED FOAM

Foams for filling cavities and crevasses and for forming foamed products are provided. The latex foam may include an A-side containing a functionalized latex and a B-side that contains a crosslinking agent and optionally a non-functionalized latex. The A- and/or B-side contain a blowing agent package or components forming the blowing agent package. The blowing agent package may be the combination of two or more chemicals that when mixed together form a gas or a chemical compound that, when activated by heat or light, forms a gas. In an alternate embodiment, the latex foam includes a functionalized latex, an acid, and an encapsulated crosslinking agent and base. Alternatively, the spray latex foam may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application. 2. The method of claim 1 , the method further comprising positioning an interior member on said elastomeric foam.3. The method of claim 1 , wherein said crosslinking agent is a polyfunctional aziridine.4. The method of claim 3 , wherein said blowing agent is formed of an acid and a base claim 3 , wherein said first component includes said base when said second component includes said acid; and wherein said first component includes said acid when said second component includes said base claim 3 , said method further comprising the step of reacting said acid and said base to form a gas to initiate said foaming reaction.5. The method of claim 3 , wherein said acid is polyacrylic acid claim 3 , said base is sodium bicarbonate claim 3 , and said foam has a structure; and wherein said polyacrylic acid reacts with said sodium bicarbonate to form a gas as said polyacrylic acid further reacts with said crosslinking agent to become integrated with said foam structure.6. The method of claim 3 , wherein said base is sodium bicarbonate having a mean particle size from ...

PUMPABLE, THERMALLY CURABLE AND EXPANDABLE PREPARATIONS

A thermally expandable preparation pumpable at application temperatures in the range of 50 to 120° C., is provided containing: at least one polymer selected from binary copolymers containing at least one monomer unit selected from vinyl acetate, (meth)acrylic acids, styrene and derivatives thereof, and terpolymers based on at least one first monomer selected from the monounsaturated or polyunsaturated hydrocarbons, and at least one second monomer selected from (meth)acrylic acids and derivatives thereof, and at least one third monomer selected from epoxy-functionalized (meth)acrylates, as well as combinations of the first two; at least one liquid polymer selected from liquid hydrocarbon resins, liquid polyolefins and liquid polymers based on one or more diene monomers; at least one peroxide; at least one thermally activatable blowing agent; and at least one adhesion promoter; as well as methods to stiffen/reinforce or seal structural components by application of the preparation. 1. A thermally expandable preparation which can be pumped at application temperatures in a range of 50° C. to 120° C. , and contains , in each case based on a total weight of the preparation: (a1) binary copolymers containing at least one monomer unit selected from vinyl acetate, (meth)acrylic acids, styrene and derivatives thereof, and', '(a2) terpolymers based on at least one first monomer selected from monounsaturated or polyunsaturated hydrocarbons, and at least one second monomer selected from (meth)acrylic acids and derivatives thereof, and at least one third monomer selected from epoxy-functionalized meth(acrylates); and combinations of (a1) and (a2);, '(a) 3 to 40 wt. % of at least one polymer, optionally comprising a peroxidically crosslinkable polymer, the at least one polymer being selected from (b1) liquid hydrocarbon resins;', '(b2) liquid polyolefins; and', '(b3) liquid polymers based on one or more diene monomers;, '(b) 1 to 40 wt. % of at least one liquid polymer selected ...

Polypropylenes Having Balanced Strain Hardening, Melt Strength, and Shear Thinning

A composition comprising the reaction product of a polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g′) of at least 0.97, and a melt strength greater than 10 cN determined using an extensional rheometer at 190° C.; and within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic peroxide. Such hyperbranched polypropylenes are useful in films, foamed articles, and thermoformed articles. 1. A composition comprising the reaction product of:{'sub': 'vis', 'a polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g′) of at least 0.97, and a melt strength greater than 10 cN determined using an extensional rheometer at 190° C.; and'}within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic peroxide.2. (canceled)3. (canceled)4. The composition of wherein the polypropylene has an MWD (Mw/Mn) within the range from 6 to 18.5. The composition of claim 1 , wherein the polypropylene has a melt strength within the range from 10 cN to 40 cN.6. The composition of claim 1 , wherein the polypropylene has a Peak Extensional Viscosity (non-annealed) within a range from 10 kPa·s to 60 kPa·s at a strain rate of 0.01/sec (190° C.).7. The composition of claim 1 , wherein the polypropylene has a heat distortion temperature of greater than or equal to 100° C. claim 1 , determined according to ASTM D648 using a load of 0.45 MPa (66 psi).8. The composition of claim 1 , wherein the polypropylene comprises at least 90 mol % propylene.9. The composition of claim 1 , wherein the polypropylene has a melt flow rate (MFR) within the range from 0.1 to 100 g/10 min claim 1 , determined according to ASTM D1238 Condition L (230° C./2.16 kg).10. The composition of claim 1 , wherein the polypropylene has an Mz/Mw value of less ...

Method for Preparing Porous Scaffold for Tissue Engineering, Cell Culture and Cell Delivery

The present invention relates to a method for preparing a porous scaffold for tissue engineering. It is another object of the present invention to provide a porous scaffold obtainable by the method as above described, and its use for tissue engineering, cell culture and cell delivery. The method of the invention comprises the steps consisting of: a) preparing an alkaline aqueous solution comprising an amount of at least one polysaccharide, an amount of a cross-linking agent and an amount of a porogen agent b) transforming the solution into a hydrogel by placing said solution at a temperature from about 4° C. to about 80° C. for a sufficient time to allow the cross-linking of said amount of polysaccharide and c) submerging said hydrogel into an aqueous solution d) washing the porous scaffold obtained at step c).

POROUS CROSSLINKED HYDROPHILIC POLYMERIC MATERIALS PREPARED FROM HIGH INTERNAL PHASE EMULSIONS CONTAINING HYDROPHILIC POLYMERS

The present disclosure relates to a process for preparing porous crosslinked hydrophilic polymeric materials. Such materials can be prepared from oil-in-water high internal phase emulsions (HIPEs) containing hydrophilic polymers. The oil-in-water high internal phase emulsion (HIPE) comprises two phases: an external continuous aqueous phase containing at least one hydrophilic polymer; and an internal oil phase. The hydrophilic polymer is crosslinked to form a three-dimensionally crosslinked polymer matrix. The internal oil phase is subsequently removed to obtain a porous crosslinked hydrophilic polymeric material. The present invention also relates to porous crosslinked hydrophilic polymeric materials prepared by such a process. 1. A process for the preparation of a porous crosslinked hydrophilic polymeric material comprising:forming an oil-in-water high internal phase emulsion (HIPE) from an oil phase and an aqueous phase, wherein the aqueous phase comprises at least one hydrophilic polymer and at least one crosslinker capable of crosslinking with the at least one hydrophilic polymer;causing the crosslinking of the at least one hydrophilic polymer to occur for creating a first crosslinked polymer network; andremoving the oil phase from the first crosslinked polymer network to obtain a porous crosslinked hydrophilic polymeric material.2. The process of claim 1 , wherein a volume ratio between the oil phase and aqueous phase is between the range of 70:30 to 99:1 claim 1 , an amount of the at least one hydrophilic polymer is between about 33% to about 100% by weight of a total amount of the network-forming polymers claim 1 , and an amount of the at least one crosslinker is between about 0.1% to 50% by weight of the amount of the at least one hydrophilic polymer.3. The process of or claim 1 , further comprising forming a second crosslinked polymer network within the aqueous phase claim 1 , by copolymerizing at least one water soluble monofunctional ethylenically ...

POLYOLEFIN ELASTOMER COMPOSITIONS AND METHODS OF MAKING THE SAME

An elastomeric article is provided that includes a composition having a silane-crosslinked polyolefin elastomer with a density less than 0.90 g/cm. The elastomeric article can exhibit a compression set of from about 5.0% to about 35.0%, as measured according to ASTM D 395 (22 hrs @ 70° C.). The silane-crosslinked polyolefin elastomer can include a first polyolefin having a density less than 0.86 g/cm, a second polyolefin having a crystallinity less than 40%, a silane crosslinker, a grafting initiator, and a condensation catalyst. 1. A silane-crosslinked polyolefin elastomer blend comprising:{'sup': '3', 'a first polyolefin having a density less than 0.86 g/cm;'}a second polyolefin having a percent crystallinity less than 40%;a silane crosslinker,{'sup': '3', 'wherein the silane-crosslinked polyolefin elastomer blend exhibits a compression set of from about 5.0% to about 35.0%, as measured according to ASTM D 395 (22 hrs @ 70° C.) and wherein the silane-crosslinked polyolefin elastomer blend has a density less than 0.90 g/cm.'}2. The silane-crosslinked polyolefin elastomer blend of further comprising a microencapsulated foaming agent.3. The silane-crosslinked polyolefin elastomer blend of claim 1 , wherein the density is less than 0.70 g/cm.4. The silane-crosslinked polyolefin elastomer blend of further comprising a foaming agent.5. The silane-crosslinked polyolefin elastomer blend of claim 1 , wherein the density is less than 0.60 g/cm.6. The silane-crosslinked polyolefin elastomer blend of claim 1 , wherein the compression set is from about 15.0% to about 35.0% claim 1 , as measured according to ASTM D 395 (22 hrs @ 70° C.).7. The silane-crosslinked polyolefin elastomer blend of claim 1 , wherein the first polyolefin comprises an ethylene-octene copolymer from about 60 wt % to about 97 wt %.8. The silane-crosslinked polyolefin elastomer blend of claim 1 , wherein the second polyolefin comprises a polypropylene homopolymer from about 10 wt % to about 35 wt % and/or ...

System and method for making textured foram that simulates human fingerprints

A section of (cured and non-liquid) textured foam includes at least a portion of an upper surface that substantially resembles a look of a human fingerprint for a purpose of providing enhanced grip traction between the at least the portion of the upper surface of the textured foam and a hand or a foot of a user of the textured foam. Disposed opposite of the upper surface of the textured foam may be an adhesive backing for attachment to a diverse variety of exterior surfaces where improved grip traction are desired. Systems and methods for making such textured foam that substantially resembles a look of a human fingerprint may utilize a heating means and a compression means.

FOAMED INJECTION MOULDED ARTICLE

The invention is directed to a foamed injection moulded article comprising a foam composition obtained by foaming high density polyethylene having a quotient of melt strength and apparent viscosity >2 cN/k·Pa·s wherein the melt strength is determined as described in ISO 16790:2005 and the apparent viscosity is determined as described in ISO 11443:2014. 1. A foamed injection moulded article comprising a foam composition obtained by foaming high density polyethylene having a quotient of melt strength and apparent viscosity >2 cN/k·Pa·s wherein the melt strength is determined as described in ISO 16790:2005 and the apparent viscosity is determined as described in ISO 11443:2014.2. The article according to characterised in that the high density polyethylene hasMI (melt index) in the range between ≥0.01 and ≤50{'sup': '3', 'density in the range between ≥930 and ≤985 kg/mand'} MI in the range between ≥1 and ≤100 and', {'sup': '3', 'density in the range between ≥930 and ≤985 kg/m'}], 'and the high density polyethylene has been obtained by chain branching high density polyethylene having'}, 'a gel fraction less than 5%'}wherein MI (melt index) is measured according ISO1133-1:2011 at a temperature of 190° C. at a load of 2.16 kg, the density is measured at a temperature of 23° C. according ISO1183-1:2012 and the gel fraction is determined according to ASTM D2765-11.3. The article according to characterised in that chain branching is performed by irradiation.4. The article according to characterised in that irradiation takes place via electron beam irradiation.5. The article according to characterised in that the foam injection moulded article has a density between 100 and 750 kg/m.6. The article according to characterised in that the melt strength of polyethylene to be foamed ≥10 cN.7. The article according to characterised in that the article comprises two compact skins and a foamed core between the two compact skins.8. The article according to characterised in that the high ...

ELECTRICALLY CONDUCTIVE RUBBER COMPOSITION, TRANSFER ROLLER, AND IMAGE FORMING APPARATUS

An electrically conductive rubber composition is provided, which comprises a rubber component including an SBR, an EPDM and an epichlorohydrin rubber, a crosslinking component and an azodicarbonamide foaming agent having an average particle diameter of 3 to 11 μm. The azodicarbonamide foaming agent is blended in a proportion of 0.5 to 8 parts by mass based on 100 parts by mass of the overall rubber component. A transfer roller () is produced by extruding the electrically conductive rubber composition into an elongated tubular body, and continuously feeding out the tubular body in the elongated state without cutting the tubular body to continuously pass the tubular body through a microwave crosslinking device and a hot air crosslinking device to continuously foam and crosslink the tubular body. 1. An electrically conductive rubber composition which can be foamed and crosslinked by means of a continuous crosslinking apparatus including a microwave crosslinking device and a hot air crosslinking device , the electrically conductive rubber composition comprising:a rubber component including at least a styrene butadiene rubber, an ethylene propylene diene rubber and an epichlorohydrin rubber;a crosslinking component for crosslinking the rubber component; anda foaming component for foaming the rubber component;wherein the foaming component comprises an azodicarbonamide foaming agent having an average particle diameter of not less than 3 μm and not greater than 11 μm in a proportion of not less than 0.5 parts by mass and not greater than 8 parts by mass based on 100 parts by mass of the overall rubber component.2. The electrically conductive rubber composition according to claim 1 , wherein the rubber component comprises at least one polar rubber selected from the group consisting of an acrylonitrile butadiene rubber claim 1 , a chloroprene rubber claim 1 , a butadiene rubber and an acryl rubber. The present application is a 37 C.F.R. §1.53(b) divisional of U.S. application ...

Biodegradable crosslinked polymers

A biodegradable crosslinked polymer which is a reaction product of a polymer having aldehyde-reactive functional groups and a polyaldehyde, wherein the polymer having aldehyde-reactive functional groups comprises a biodegradable structure or the polyaldehyde comprises a biodegradable structure.

Soft actuator and methods of fabrication

Soft actuators are fabricated from materials that enable the actuators to be constructed with an open-celled architecture such as an interconnected network of pore elements. The movement of a soft actuator is controlled by manipulating the open-celled architecture, for example inflating/deflating select portions of the open-celled architecture using a substance such as compressed fluid.

SILICONE FOAM COMPOSITIONS RAPIDLY CROSS-LINKABLE AT AMBIENT TEMPERATURES AND METHODS OF MAKING AND USING SAME

Provided are rapidly cross-linkable silicone foam compositions, kits, and methods for filling implanted medical devices in situ or in vivo, the implanted medical devices, including for example, body implants and tissue expanders, the compositions including a platinum divinyl disiloxane complex; a low viscosity vinyl terminated polydimethylsiloxane; a low viscosity hydride terminated polydimethylsiloxane; a silicone cross-linker; and a gas and/or gas-filled microcapsules, where the rapidly cross-linkable silicone foam composition has a viscosity of ≤150 cPs for ≥1 min. post-preparation and ≤300 cPs≤5 min. post-preparation, at ambient temperature. 1. A method of filling an implanted medical device , comprising:receiving a catalyst fluid comprising a first low viscosity vinyl terminated polydimethylsiloxane present in an amount of from about 97 wt % to about 99.5 wt % based on the weight of the catalyst fluid, and a platinum divinyl disiloxane complex;receiving a cross-linker suspension comprising a second low viscosity vinyl terminated polydimethylsiloxane, a low viscosity hydride terminated polydimethylsiloxane, a silicone cross-linker, and a sterile gas;mixing the catalyst fluid with the cross-linker suspension to produce an injectable composition having an initial viscosity of <150 cPs for at least about 1 minute after the mixing and a viscosity of ≥50,000 cPs≤24 hours after the mixing at ambient temperature; andinjecting a predetermined volume of the injectable composition into the implanted medical device.2. The method of claim 1 , in which the first low viscosity vinyl terminated polydimethylsiloxane is present in the catalyst fluid in an amount of from about 98 wt % to about 99 wt % based on the weight of the catalyst fluid.3. The method of claim 1 , in which the first low viscosity vinyl terminated polydimethylsiloxane has a viscosity of from about 1 to about 150 cPs.4. The method of claim 1 , in which the platinum divinyl disiloxane complex comprises Pt[(CH═ ...

SHOE SOLES, COMPOSITIONS, AND METHODS OF MAKING THE SAME

A shoe sole composition and method for making a shoe sole are provided. The shoe sole includes a composition comprising a foamed silane-crosslinked polyolefin elastomer having a density less than 0.50 g/cm. The shoe sole exhibits a compression set of from about 5.0% to about 20.0%, as measured according to ASTM D 395 (6 hrs @ 50° C.). The foamed silane-crosslinked polyolefin elastomer can be produced from a blend including a first polyolefin having a density less than 0.86 g/cm, a second polyolefin, having a crystallinity less than 40%, a silane crosslinker, a grafting initiator, a condensation catalyst, and a foaming agent. 1. A shoe midsole comprising:{'sup': '3', 'claim-text': [{'sup': '3', 'a first polyolefin having a density less than 0.86 g/cm,'}, 'a second polyolefin having a crystallinity less than 40%,', 'a silane crosslinker,', 'a grafting initiator,', 'a condensation catalyst, and', 'a foaming agent,, 'a foamed silane-crosslinked polyolefin elastomer having a density less than 0.50 g/cm, the foamed silane-crosslinked polyolefin elastomer comprisingwherein the shoe midsole exhibits a compression set of from about 1.0% to about 50.0%, as measured according to ASTM D 395 (48 hrs @ 50° C.).2. The shoe midsole of claim 1 , wherein the first polyolefin is an ethylene/α-olefin copolymer from about 60 wt % to about 97 wt %.3. The shoe midsole of claim 1 , wherein the second polyolefin is a polypropylene homopolymer and/or a poly(ethylene-co-propylene) claim 1 , the second polyolefin from about 10 wt % to about 35 wt %.4. The shoe midsole of claim 1 , wherein the silane crosslinker comprises a vinyltrialkoxy silane from about 1 wt % to about 4 wt %.5. The shoe midsole of claim 1 , wherein the grafting initiator comprises one or more halogen molecules claim 1 , azo compounds claim 1 , carboxylic peroxyacids claim 1 , peroxyesters claim 1 , peroxyketals claim 1 , and peroxides claim 1 , the grafting initiator from greater than 0.15 wt % to about 2 wt %.6. The shoe ...

PROCESS FOR PRODUCING EXPANDED POLYETHYLENE-BASED RESIN BEADS AND PROCESS FOR PRODUCING POLYETHYLENE-BASED MOLDED RESIN OBJECT BY IN-MOLD FOAMING

A method for producing polyethylene-based resin foamed particles includes a first-step foaming process. The first-step foaming process includes: producing an aqueous dispersion by dispersing polyethylene-based resin particles in an aqueous dispersing medium in a sealed vessel, adding a carbon dioxide-containing foaming agent to the aqueous dispersion in the sealed vessel, heating and pressurizing the aqueous dispersion in the sealed vessel, and releasing the aqueous dispersion in the sealed vessel to a pressure region where a pressure is lower than an internal pressure of the sealed vessel. The foaming ratio in the first-step foaming process is 10 to 18 times. The polyethylene-based resin particles have a polyethylene-based base resin and a melting point of 105 to 125° C., a tan δ of 0.3 to 0.7, and a complex viscosity of 5000 to 20000 Pa·s. 1. A method for producing polyethylene-based resin foamed particles comprising a first-step foaming process that comprises:producing an aqueous dispersion by dispersing polyethylene-based resin particles in an aqueous dispersing medium in a sealed vessel;adding a foaming agent containing carbon dioxide to the aqueous dispersion in the sealed vessel;heating and pressurizing the aqueous dispersion in the sealed vessel; andreleasing the aqueous dispersion in the sealed vessel to a pressure region where a pressure is lower than an internal pressure of the sealed vessel,wherein a foaming ratio in the first-step foaming process is 10 to 18 times,wherein the polyethylene-based resin particles comprise a base resin that is a polyethylene-based resin,wherein the polyethylene-based resin particles have a melting point of 105 to 125° C., a tan δ of 0.3 to 0.7, and a complex viscosity of 5000 to 20000 Pa·s, andwherein the tan δ and the complex viscosity are determined by a viscoelasticity measurement at a temperature of 130° C. and a frequency of 1.67 Hz.2. The method according to claim 1 , wherein the tan δ is 0.4 to 0.6 and the complex ...

SPONGE-FORMABLE SILICONE RUBBER COMPOSITION AND SILICONE RUBBER SPONGE

A sponge-formable silicone rubber composition comprises: (A) a polyorganosiloxane having at least two silicon-bonded alkenyl groups per molecule, (B) a polyorganosiloxane having at least two silicon-bonded hydrogen atoms per molecule, (C) water, (D) cellulose nanofibers, (E) an emulsifier, and (F) a hydrosilylation reaction catalyst. The sponge-formable silicone rubber composition can form a silicone rubber sponge having uniform and fine bubbles and that does not readily contaminate a mold. 1. A sponge-formable silicone rubber composition comprising:(A) 100 parts by mass of a polyorganosiloxane having at least two silicon-bonded alkenyl groups per molecule;(B) a polyorganosiloxane having at least two silicon-bonded hydrogen atoms per molecule, in an amount such that an amount of silicon-bonded hydrogen atoms in component (B) is from 0.4 to 20 moles per 1 mole of alkenyl groups in component (A);(C) from 20 to 500 parts by mass of water;(D) cellulose nanofibers, in an amount of from 0.01 to 15 parts by mass per 100 parts by mass of component (C);(E) from 0.1 to 15 parts by mass of an emulsifier; and(F) a hydrosilylation reaction catalyst, in an amount to accelerate a hydrosilylation reaction of the composition.2. The sponge-formable silicone rubber composition according to claim 1 , wherein component (D) is cellulose nanofibers having a number-average fiber diameter of 2 to 150 nm.3. The sponge-formable silicone rubber composition according to claim 1 , further comprising (G) a hydrosilylation reaction inhibitor claim 1 , in an amount of 0.001 to 5 parts by mass per 100 parts by mass of component (A).4. The sponge-formable silicone rubber composition according to claim 1 , further comprising (H) a reinforcing silica fine powder claim 1 , in an amount of not greater than 30 parts by mass per 100 parts by mass of component (A).5. A silicone rubber sponge obtained by crosslinking the sponge-formable silicone rubber composition according to by a hydrosilylation reaction ...

NEW FOAM WITH IMPROVED EXPANSION BEHAVIOUR WHEN USED IN THIN LAYERS

A thermally expandable composition, including (a) at least one polymer P, cross-linkable by a free-radical initiator, and (b) at least one solid butyl rubber BRu, and (c) at least one free-radical initiator, and (d) at least one blowing agent, and (e) at least one tackifier TA, whereby the cured expanded composition has a volume increase compared to the uncured composition of less than 1300%. The thermally expandable composition is able to provide good expansion behaviour and good adhesion on metal surfaces and is especially suitable for baffle and/or reinforcement elements, e.g. in automotive manufacturing. 1. A thermally expandable composition , comprising(a) at least one polymer P, cross-linkable by a free-radical initiator, and(b) at least one solid butyl rubber BRu, whereby the composition comprises the solid butyl rubber with an amount of between 5 wt.-% and 16 wt.-%, based on the total weight of the composition, and(c) at least one free-radical initiator, and(d) at least one blowing agent, and(e) at least one tackifier TA,whereby the cured expanded composition has a volume increase compared to the uncured composition of less than 1300%, whereby the volume increase is determined using the DIN EN ISO 1183 method of density measurement (Archimedes principle).2. The thermally expandable composition of claim 1 , wherein the composition comprises the tackifier with an amount of between 12 wt.-% and 30 wt.-% claim 1 , based on the total weight of the composition.3. The thermally expandable composition of claim 1 , wherein the tackifier is a hydrocarbon resin.4. The thermally expandable composition of claim 1 , wherein the composition further comprises at least one process oil PO selected from the group consisting of aromatic oil claim 1 , naphthenic oil and poly(iso)butylene.5. The thermally expandable composition according to claim 4 , wherein the composition comprises the process oil PO with an amount of between 18 wt.-% and 35 wt.-% claim 4 , based on the total ...

REVERSIBLY CROSS-LINKABLE RESIN

Reversibly cross-linkable foam is provided. The reversibly cross-linked foam includes a first polymeric material, at least one reversibly cross-linkable monomer polymerized with the first polymeric material, and at least one blowing agent. The reversibly cross-linkable co-polymeric foam is thermally stable at temperatures of at least 10 degrees higher than otherwise identical polymeric foam that does not include the reversibly cross-linkable agent polymerized with the first polymeric material. 1. A method of manufacturing extruded reversibly cross-linkable polymeric foam comprising: a first polymeric material and;', 'at least one reversibly cross-linkable agent polymerized with said first polymeric material, forming a reversibly cross-linkable copolymer;, 'introducing a foamable polymeric composition into an extruder to form a polymer melt, said foamable polymeric composition comprisinginjecting at least one blowing agent into said reversibly cross-linkable copolymer, forming an extrusion composition; andextruding said extrusion composition to produce a reversibly cross-linkable foam, wherein said reversibly cross-linkable foam is thermally stable at temperatures of at least 10 degrees Celsius higher than otherwise identical polymeric foam that does not include the cross-linking agent polymerized with the first polymeric material.2. The method of claim 1 , wherein said first polymeric material comprises an alkenyl aromatic polymer.3. The method of claim 2 , wherein said alkenyl aromatic polymer is derived from one or more of styrene claim 2 , a-methylstyrene claim 2 , ethylstyrene claim 2 , vinyl benzene claim 2 , vinyl toluene claim 2 , chlorostyrene claim 2 , and bromostyrene.4. The method of claim 1 , wherein said cross-linking agent comprises a metal-ligand complex ion.5. The method of claim 1 , wherein said metal-ligand complex ion includes a hydroxyl-containing (meth)acrylate.6. The method of claim 1 , wherein said ligand is at least one of a polyester (meth) ...

ROOFING MEMBRANES, COMPOSITIONS, AND METHODS OF MAKING THE SAME

A roofing membrane and a method of making the same is provided. The roofing membrane includes a top layer having a flame retardant and a first silane-crosslinked polyolefin elastomer with a density less than 0.90 g/cm; a scrim layer; and a bottom layer having a flame retardant and a second silane-crosslinked polyolefin elastomer with a density less than 0.90 g/cm. The top and bottom layers of the roofing membrane both exhibit a compression set of from about 5.0% to about 35.0%, as measured according to ASTM D 395 (22 hrs @ 70° C.). 1. A roofing membrane comprising:{'sup': '3', 'a top layer comprising a flame retardant and a first silane-crosslinked polyolefin elastomer having a density less than 1.45 g/cm;'}an optional scrim layer; and{'sup': '3', 'a bottom layer comprising a flame retardant and a second silane-crosslinked polyolefin elastomer having a density less than 1.45 g/cm.'}2. The roofing membrane of claim 1 , wherein the flame retardant comprises a magnesium hydroxide and/or an aluminum hydroxide from about 20 wt % to about 70 wt %.3. The roofing membrane of claim 1 , wherein the first and second silane-crosslinked polyolefin elastomers both exhibit a crystallinity of from about 5% to about 25%.4. The roofing membrane of claim 1 , wherein the first and second silane-crosslinked polyolefin elastomers have a glass transition temperature of from about −75° C. to about −25° C.5. The roofing membrane of claim 1 , wherein the first and second silane-crosslinked polyolefin elastomers each comprise a first polyolefin having a density less than 0.86 g/cm claim 1 , a second polyolefin claim 1 , a silane crosslinker claim 1 , a grafting initiator claim 1 , and a condensation catalyst.6. The roofing membrane of claim 5 , wherein the silane crosslinker comprises a vinyltrialkoxy silane from about 1 wt % to about 4 wt %.7. The roofing membrane of claim 5 , wherein the condensation catalyst comprises a sulfonic ester catalyst and/or a tin catalyst from about 1 wt % to ...

Hybrid foam formulations

Embodiments of the present disclosure are directed towards hybrid foam formulations that include: an isocyanate-reactive composition, and a high-functionality crosslinker; an azo type radical initiator; and an isocyanate.

Closed-cell foamed rubber-based resin object

A rubber-based resin closed-cell foam comprising a rubber-based resin having an acrylonitrile component content of 30% by mass or more, and carbon black contained in the rubber-based resin portion, the carbon black having a total nitrogen adsorption specific surface area of 600 to 2400 m 2 per 100 parts by mass of the rubber-based resin.

Modified polystyrene resin particles and manufacturing method therefor, expandable particles and manufacturing method therefor, pre-expanded particles, and expanded molded article

Modified polystyrene cross-linked resin particles in which polyacrylic acid ester-based resin fine particles having an average particle diameter in the range of 30 to 1,000 nm are dispersed in polystyrene-based resin particles, wherein the content of gel component fraction insoluble to toluene when about 1 g of the modified polystyrene-based cross-linked resin particles is dissolved in 50 ml of toluene at 25° C. is in the range of from 5 to 25% and the gel component shows a degree of swelling in the range of from 10 to 20 in toluene at 25° C.

Thermally hardenable preparations

The subject matter of the present application is thermally-expandable preparations, containing (a) at least one peroxide-crosslinkable polymer, (b) at least one low-molecular, multifunctional acrylate, (c) at least one peroxide and (d) at least two different chemical propellants, the mass ratio of the at least one peroxide to the at least one low-molecular, multifunctional acrylate being at least 1:3.

Sustainable hybrid organic aerogels and methods and uses thereof

Highly porous, lightweight, and sustainable hybrid organic aerogels with ultra-low densities and excellent material properties and methods for preparing them are provided, including, e.g., PVA/CNF/GONS, RF/CNF/GONS, and PVA/CNF/MWCNT. The aerogels are modified to have a super-hydrophobic surface, thus leading to an extremely low swelling ratio and rate of moisture absorption.

THERMALY EXPANDABLE COMPOSITION WITH REDUCED ODOR FORMATION

A thermally expandable composition includes at least one polymer P cross-linkable by peroxide, and at least one acrylate, and at least one peroxide, azodicarbonamide and a zinc compound. The thermally expandable composition leads to low odor formation and low ammonia emission during and after the foaming process. The thermally expandable composition further shows excellent properties in terms of expansion stability. 1. A thermally expandable composition , comprising(a) at least one polymer P, cross-linkable by peroxide, and(b) at least one acrylate A, and(c) at least one peroxide PE, and(d) azodicarbonamide ADCA,(e) zinc compound ZC,wherein the molar ratio of the zinc compounds ZC to the peroxide PE is between 0.1 and 6.0,and the molar ratio of the azodicarbonamide ADCA to the peroxide PE is between 5 and 30.2. The thermally expandable composition according to claim 1 , wherein the molar ratio of the zinc compound ZC to the peroxide PE is between 0.1 and 4.0.3. The thermally expandable composition according to claim 1 , wherein the molar ratio of the zinc compound ZC to the peroxide PE is between 0.5 and 2.5.4. The thermally expandable composition according to claim 1 , wherein the molar ratio of the zinc compound ZC to the peroxide PE is between 0.1 and 2.05. The thermally expandable composition of claim 1 , wherein the molar ratio of the azodicarbonamide ADCA to the peroxide PE is between 8 and 25.6. The thermally expandable composition of claim 1 , wherein the molar ratio of the azodicarbonamide ADCA to the peroxide PE is between 12 and 25.7. The thermally expandable composition of claim 1 , wherein the molar ratio of the azodicarbonamide ADCA to the sum of peroxide PE and zinc compound ZC (ADCA:(PE+ZC)) is between 2 and 20.8. The thermally expandable composition of claim 1 , wherein the zinc compound ZC is selected from at least one of the group consisting of zinc oxide claim 1 , zinc stearate claim 1 , zinc bis(p-toluenesulphinate) and zinc bis( ...

ELECTRET SHEET AND PIEZOELECTRIC SENSOR

The present invention provides an electret sheet which can maintain a high generated voltage even if a large amount of pressure has been applied. Disclosed is an electret sheet of the present invention including an electrically charged propylene-based resin foam sheet which contains a crosslinked propylene-based resin that includes a propylene-α-olefin random copolymer having a weight average molecular weight of 370,000 to 420,000 at a proportion of 60% by weight or more, and has a gel fraction of 30% to 50% by weight, and in which the average thickness is 90 to 150 μm, and the average number of foam cells in the thickness direction is 2 to 4 cells. 1. An electret sheet comprising an electrically charged propylene-based resin foam sheet having an average thickness of 90 to 150 μm , a foaming ratio of 3.5 to 9 times , and a gel fraction of 30% to 50% by weight ,wherein the propylene-based resin foam sheet includes a resin composition containing a crosslinked body of a propylene-α-olefin random copolymer having a weight average molecular weight of 370,000 to 420,000 at a proportion of 60% by weight or more.2. The electret sheet according to claim 1 , wherein the gel fraction of the propylene-based resin foam sheet is 35% to 50% by weight.3. The electret sheet according to claim 1 , wherein the total content of fatty acids and fatty acid amides included in all of the crosslinked bodies of the propylene-α-olefin random copolymer in the resin composition is 50 ppm or less relative to the total weight of the crosslinked bodies of the propylene-α-olefin random copolymer.4. The electret sheet according to claim 1 , wherein the crosslinked body of the propylene-α-olefin random copolymer is a crosslinked body formed using a polyfunctional acrylic monomer.5. A piezoelectric sensor comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the electret sheet according to ;'}a signal electrode laminated on a first surface of the electret sheet; anda ground electrode laminated ...

Method of microcellular foam molding

A method of microcellular foam molding an article is provided with filling a mold with a polyolefin compound; forming crosslinks in the mold to obtain a crosslinked mold; dissolving a supercritical fluid into the crosslinked mold under a predetermined pressure and at a predetermined temperature for a predetermined period of time to obtain a second mold configured to allow the supercritical fluid to effuse through; and heating the second mold at a second predetermine temperature for a predetermined foaming time until a foamed article is finished in the second mold. A second embodiment involves using elastomers as foaming materials is also provided.

MACROPOROUS PHOTONIC CRYSTAL MEMBRANE, METHODS OF MAKING, AND METHODS OF USE

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, embodiments of the present disclosure, in one aspect, relate to macroporous photonic crystal membranes, structures including macroporous photonic crystal membranes, devices including macroporous photonic crystal membranes, methods of using macroporous photonic crystal membranes, methods of making macroporous photonic crystal membranes, and the like. 114-. (canceled)15. A method , comprising:providing a macroporous photonic crystal membrane including a three dimensional array of macropores, wherein a three dimensional polymer framework separates the macropores, wherein the macropores are in a collapsed state, wherein when the macropores are in the collapsed state the macroporous photonic crystal membrane is substantially transparent,exposing the macropores to a vapor, andtransforming the macropores transform from the collapsed state into an uncollapsed state, wherein the macroporous photonic crystal membrane has an iridescent color in the uncollapsed state.16. The method of claim 15 , wherein the vapor is selected from the group consisting of: acetone claim 15 , methanol claim 15 , dichloromethane claim 15 , benezene claim 15 , toluene claim 15 , and ethanol.17. The method of claim 15 , wherein the vapor is acetone.18. The method of claim 15 , wherein the macroporous photonic crystal membrane having the macropores in the uncollapsed state after exposure to a first vapor has a different iridescent color than the macroporous photonic crystal membrane having the macropores in the uncollapsed state after exposure to a second vapor.19. The method of claim 15 , wherein the first vapor is acetone and the second vapor is selected from the group consisting of: methanol claim 15 , dichloromethane claim 15 , benezene claim 15 , toluene claim 15 , and ethanol.2010. The method of claim claim 15 , furthering comprising:exposing the macroporous photonic crystal membrane having the ...

CROSSLINKED POLYVINYLIDENE FLUORIDE RESIN FOAM SHEET AND METHOD FOR PRODUCING SAME

The foamed sheet of the present invention is a foamed sheet obtained by crosslinking and foaming a polyvinylidene fluoride-based resin composition comprising a polyvinylidene fluoride-based resin, wherein the polyvinylidene fluoride-based resin comprises a vinylidene fluoride-hexafluoropropylene copolymer, a density of the foamed sheet is not more than 180 kg/cm, and an average cell diameter of the foamed sheet is not less than 100 μm and not more than 500 μm. According to the present invention, a crosslinked polyvinylidene fluoride-based resin foamed sheet having both good flame retardance and good flexibility and a process for producing the foamed sheet are provided. 1. A crosslinked polyvinylidene fluoride-based resin foamed sheet obtained by crosslinking and foaming a polyvinylidene fluoride-based resin composition comprising a polyvinylidene fluoride-based resin , whereinthe polyvinylidene fluoride-based resin comprises a vinylidene fluoride-hexafluoropropylene copolymer,{'sup': '3', 'a density of the crosslinked polyvinylidene fluoride-based resin foamed sheet is not more than 180 kg/m, and'}an average cell diameter of the crosslinked polyvinylidene fluoride-based resin foamed sheet is not less than 100 μm and not more than 500 μm.2. The crosslinked polyvinylidene fluoride-based resin foamed sheet according to claim 1 , wherein the number of cells within 3 mm width of the crosslinked polyvinylidene fluoride-based resin foamed sheet is not less than 5 and not more than 20.3. The crosslinked polyvinylidene fluoride-based resin foamed sheet according to claim 1 , wherein cell diameters within 3 mm width of the crosslinked polyvinylidene fluoride-based resin foamed sheet satisfy the following formula:{'br': None, 'i': maximum value of cell diameters within', 'mm width', 'minimum value of cell diameters within', 'mm width', 'average cell diameter, '{(3 )−(3 )}/()≤2.2.'}4. The crosslinked polyvinylidene fluoride-based resin foamed sheet according to claim 1 , having ...

PRODUCTION OF A PMMA FOAM USING CROSS-LINKING AGENTS, REGULATORS AND BLOWING AGENTS

The present invention relates to novel types of PMMA foams and also to the production thereof. The recipes used in the production process include particularly crosslinkers and chain transfer agents as recipe constituents, mostly in low concentrations, in addition to suitable blowing agents. It was found that, surprisingly, the invention provides a simple-to-produce stable PMMA foam having very good properties. 113-. (canceled)14: A process for producing a polymethacrylate foam , said process comprising:polymerizing at a temperature between 20° C. and 100° C. a composition to obtain a polymerized composition, and said composition comprising', 'from 0.01 to 2.0 wt % of an initiator,', 'from 2 to 20 wt % of a blowing agent, and', 'from 75 to 97.9 wt % of a monomer mixture,', from 79.70 to 99.995 mol % of MMA,', 'from 0 to 20 mol % of one or more MMA-copolymerizable monomers,', 'from 0.002 to 0.5 mol % of crosslinker, and', 'from 0.003 to 1.5 mol % of chain transfer agent and, 'wherein said monomer mixture comprises'}, 'may be present as polymer and/or oligomer to an extent of from 0 to 80 wt %., 'subsequently foaming the polymerized composition at between 130° C. and 250° C.,'}15: The process according to claim 14 , wherein the composition comprises from 0.2 to 1.5 wt % of the initiator claim 14 , from 3 to 15 wt % of the blowing agent and from 80 to 96.8 wt % of the monomer mixture claim 14 , wherein said monomer mixture comprises from 89.85 to 99.988 mol % of MMA claim 14 , from 0 to 10 mol % of one or more MMA-copolymerizable monomers claim 14 , from 0.005 to 0.3 mol % of crosslinker and from 0.006 to 1 mol % of chain transfer agent and is present as polymer and/or oligomer to an extent of from 0 to 50 wt %.16: The process according to claim 14 , wherein the temperature is between 30° C. and 70° C. for the polymerization and between 150° C. and 230° C. for the foaming.17: The process according to claim 14 , wherein the crosslinker comprises a di- claim 14 , tri- or ...

PROCESS FOR PRODUCING FOAMS BASED ON THERMOPLASTIC POLYURETHANES

A process for producing foamed thermoplastic polyurethane particles comprises the steps of a) melting a thermoplastic polyurethane in a first extruder (E), b) injecting a gaseous blowing agent in a second extruder (E), c) impregnating the gaseous blowing agent homogeneously into the thermoplastic polyurethane melt in a third extruder (E), d) extruding the impregnated thermoplastic polyurethane melt through a die plate and granulating the melt in an underwater granulation device under temperature and pressure conditions to form foamed thermoplastic polyurethane particles. 1. A process for producing foamed thermoplastic polyurethane particles , the process comprising:{'b': '1', 'a) melting a thermoplastic polyurethane in a first extruder E,'}{'b': '2', 'b) injecting a gaseous blowing agent in a second extruder E,'}{'b': '3', 'c) impregnating the gaseous blowing agent homogeneously into the thermoplastic pol-yurethane melt in a third extruder E, and'}d) extruding the impregnated thermoplastic polyurethane melt through a die plate and granulating the melt in an underwater granulation device under temperature and pressure conditions to form foamed thermoplastic polyurethane particles.2. The process according to claim 1 , wherein a bulk density of the foamed thermoplastic polyurethane particles formed in step d) ranges from 30 to 250 kg/m3.3. The process according to claim 1 , wherein the gaseous blowing agent comprises CO2 claim 1 , N2 claim 1 , or a combination of CO2 and N2.4132. The process according to claim 1 , wherein a single screw extruder is used as the first extruder E and the third extruder E claim 1 , and a twin extruder is used as the second Extruder E.5. The process according to claim 1 , wherein the water in the underwater granulation device has a pressure in the range from 1 to 20 bar and a temperature in the range from 10 to 50° C. This invention relates to a process for production of expanded pellets from a polymer melt comprising a blowing agent. ...

Production of fine-pored pmma foams using nucleating agents

Fine-cell PMMA foams are produced using a production process including nucleators in addition to suitable blowing agents. It was found that, surprisingly, a simple-to-produce stable PMMA foam having very fine cells and very good properties can be produced.

Optical enhancing durable anti-reflective coating

Disclosed herein are polysilsesquioxane based anti-reflective coating (ARC) compositions, methods of preparation, and methods of deposition on a substrate. In embodiments, the polysilsesquioxane of this disclosure is prepared in a two-step process of acid catalyzed hydrolysis of organoalkoxysilane followed by addition of tetralkoxysilane that generates silicone polymers with >40 mol % silanol based on Si-NMR. These high silanol siloxane polymers are stable and have a long shelf-life in the polar organic solvents at room temperature. Also disclosed are low refractive index ARC made from these compositions with and without additives such as porogens, templates, Si—OH condensation catalyst and/or nano-fillers. Also disclosed are methods and apparatus for applying coatings to flat substrates including substrate pre-treatment processes, coating processes including flow coating and roll coating, and coating curing processes including skin-curing using hot-air knives. Also disclosed are coating compositions and formulations for highly tunable, durable, highly abrasion-resistant functionalized anti-reflective coatings.

PROCESS FOR PRODUCING POROUS ALGINATE-BASED AEROGELS

The present invention relates to a process for preparing a porous material, at least comprising the steps of providing a mixture (I) comprising a water soluble polysaccharide, at least one compound suitable to react as cross-linker for the polysaccharide or to release a cross-linker for the polysaccharide, and water, and preparing a gel (A) comprising exposing mixture (I) to carbon dioxide at a pressure in the range of from 20 to 100 bar for a time sufficient to form a gel (A), and depressurizing the gel (A). Gel (A) subsequently is exposed to a water miscible solvent (L) to obtain a gel (B), which is dried. The invention further relates to the porous materials which can be obtained in this way and the use of the porous materials as thermal insulation material, for cosmetic applications, for biomedical applications or for pharmaceutical applications. 1: A process for preparing a porous material , comprising: (i) a water soluble polysaccharide,', '(ii) a compound suitable to react as cross-linker for the polysaccharide or to release a cross-linker for the polysaccharide, and', '(iii) water;, 'a) providing a mixture (I) comprising'} b1) exposing the mixture (I) to carbon dioxide at a pressure in a range of from 20 to 100 bar for a time sufficient to form a gel (A), and', 'b2) depressurizing the gel (A);, 'b) preparing a gel (A) by a process comprising'}c) exposing the gel (A) to a water miscible solvent (L) to obtain a gel (B); andd) drying of the gel (B).2: The process according to claim 1 , wherein the water soluble polysaccharide is selected from the group consisting of agar claim 1 , alginate claim 1 , carrageenan claim 1 , cellulose claim 1 , hyaluronic acid claim 1 , pectin claim 1 , starch claim 1 , xanthan gum claim 1 , modified cellulose claim 1 , chitin claim 1 , chitosan claim 1 , and a mixture thereof.3: The process according to claim 1 , wherein the water soluble polysaccharide is an alginate.4: The process according to claim 1 , wherein the preparing in ...

RESIN FOR PRODUCTION OF POROUS CERAMIC STEREOLITHOGRAPHY AND METHODS OF ITS USE

A ceramic resin is provided, along with its methods of formation and use. The ceramic resin may include a crosslinkable precursor, a photoinitiator, ceramic particles, and pore forming particles. The ceramic resin may be utilized to form a ceramic casting element, such as via a method that includes forming a layer of the ceramic resin; applying light onto the ceramic resin such that the photoinitiator initiates polymerization of the crosslinkable precursor to form a crosslinked polymeric matrix setting the ceramic particles and the pore forming particles; and thereafter, heating the crosslinked polymeric matrix to a first temperature to burn out the pore forming particles. 120-. (canceled)21. A ceramic resin , comprising:a crosslinkable precursor;a photoinitiator;ceramic particles, wherein the ceramic particles comprise 50% to 90% by volume of the ceramic resin; andpore forming particles, wherein the photoinitiator is a UV photoinitiator that is configured to initiate polymerization of the crosslinkable precursor upon exposure to UV light at a temperature below 50° C. to form a crosslinked polymeric matrix setting the ceramic particles and the pore forming particles.22. The ceramic resin of claim 21 , wherein the pore forming particles comprise 0.1% to 25% by volume of the ceramic resin.23. The ceramic resin of claim 21 , wherein the pore forming particles comprise 10% to 25% by volume of the ceramic resin.24. The ceramic resin of claim 21 , wherein the pore forming particles comprise a material that becomes gaseous within a temperature range of 70° C. to 250° C.25. The ceramic resin of claim 24 , wherein the organic material comprises naphthalene claim 24 , a naphthalene-related compound claim 24 , an epoxy claim 24 , an acrylic claim 24 , cellulose claim 24 , polyvinyl alcohol claim 24 , aluminum acetylacetonate claim 24 , or a mixture thereof.26. The ceramic resin of claim 21 , wherein the pore forming particles have an average diameter of 1 μm to 100 μm.27. The ...

Closed cell foam sheet

The closed cell foam sheet of the present invention is a closed cell foam sheet having a thickness of 0.05 to 0.35 mm, wherein the foam sheet has a 25% compressive stress of 30 to 100 kPa, a tensile strength in MD of 3,000 to 15,000 kPa, a tensile strength in TD of 1,800 to 9,800 kPa, and a recovery time of 0.1 seconds or less after the foam sheet is pressed for 5 seconds by 5 N and then released.

CELLULOSE ACETATE AEROGELS

Mechanically strong, biodegradable and reusable aerogels are disclosed, which can be made with a cross-linked cellulose ester, and which exhibit a low density and high porosity. The aerogels disclosed herein may be used as sorbent materials and can be modified with a hydrophobic and/or oleophilic agent. 1. An aerogel comprising a cross-linked cellulose ester having a degree of substitution of from about 1.0 to about 2.8 ,wherein the aerogel has a bulk density of from about 1 mg/cc to about 500 mg/cc, and{'sub': 1', '10, 'wherein the cellulose ester is a (C-C)alkyl-C(O)-functionalized cellulose.'}2. The aerogel of claim 1 , wherein the degree of substitution of the cellulose ester is from about 1.8 to about 2.6.3. The aerogel of claim 1 , wherein the cellulose ester is cellulose acetate claim 1 , cellulose acetate propionate claim 1 , cellulose acetate butyrate or a combination thereof.4. The aerogel of claim 1 , wherein the cellulose ester is cross-linked via an ester claim 1 , ether or urethane linkage.5. The aerogel of claim 4 , comprising a cross-linking agent at from about 1 wt. % to about 15 wt. %.6. The aerogel of claim 4 , comprising the cellulose ester at from about 85 wt. % to about 99 wt. %.7. The aerogel of claim 1 , wherein the cross-linking agent is selected from at least one of a C-Caromatic anhydride claim 1 , a (C-C)cycloalkyl anhydride claim 1 , a bis(halo(C-C)alkyl)-(C-C)aromatic claim 1 , a bis(halo(C-C)alkyl)(C-C)cycloalkyl claim 1 , a bis(isocyanato(C-C)alkyl)(C-C)aromatic claim 1 , or a bis(isocyanato(C-C)alkyl)(C-C)cycloalkyl.8. The aerogel of claim 7 , wherein the cross-linking agent is PMDA.9. The aerogel of claim 1 , wherein the aerogel has the capacity to absorb at least about 20 grams of water per gram of aerogel.10. The aerogel of claim 1 , further comprising a hydrophobic agent.11. The aerogel of claim 10 , wherein the hydrophobic agent is selected from at least one of a C-Calkyl silane claim 10 , a C-Ccycloalkyl silane claim 10 , an ...

METHOD OF RECYCLING INSOLE SCRAP, PULVERIZED INSOLE SCRAP, AND FOAM FOR SHOE MANUFACTURED THEREBY

A method of recycling a large amount of insole scrap stack is proposed. The method includes forming a plate-shaped stack made of flat-plate-shaped foam and woven fabric, separating an insole scrap stack from the plate-shaped stack, and forming a pulverized insole scrap having an average diameter of 0.05 to 0.7 mm by cool-pulverizing or freeze-pulverizing the insole scrap stack at 10° C. or less. The pulverized insole scrap may be used for manufacturing foam.

Composition comprising a light-weight filler

The present invention relates to compositions containing at least one reactive binder, at least one curing agent and/or accelerator, at least one thermally activatable blowing agent and at least one light-weight filler, wherein at least one expanded particle of at least one glass-rich volcanic rock with a closed outer shell is contained as a light-weight filler. The invention also relates to a method for stiffening and/or reinforcing components with thin-walled structures with a corresponding composition as well as to correspondingly produced components.

FOAM COMPOSITIONS AND USES THEREOF

Components for articles of footwear and athletic equipment are provided including a foam. A variety of foams and foam components and compositions for forming the foams are provided. In some aspects, the foams and components including the foams can have exceptionally high energy return while also having improved durability and softness. In particular, midsoles including the foams are provided for use in an article of footwear. Methods of making the compositions and foams are provided, as well as methods of making an article of footwear including one of the foam components. In some aspects, the foams and foam components can be made by injection molding or injection molding followed by compression molding. 1. A component for an article of footwear , the component comprising the crosslinked reaction product of a first composition , wherein the first composition comprises a first block and a third block, each independently comprising a linear or branched chain aliphatic polymer having a plurality of aromatic groups attached pendantly thereto,', 'a second block located between the first block and the third block and comprising an aliphatic polymer having a plurality of aliphatic side chains attached thereto, and', 'a plurality of first ethylenically unsaturated group present on one or more of the first block, second block, and third block;', 'wherein the block copolymer comprises about 60% to about 90% of the second blocks by weight based upon the weight of the block copolymer;, 'a block copolymer comprising'}an olefinic copolymer comprising a plurality of first olefinic segments and a plurality of second olefinic segments having a different chemical structure from the first olefinic segments;one or more linking polymers, each linking polymer comprising one or more third olefinic segments; andan ethylene-vinyl acetate (EVA) copolymer.wherein a sum of a ratio I, II, III, IV, and V is from about 1.00 to about 10.00;wherein the ratio I is a ratio of a total parts by weight ...

EXPANDED RUBBER ARTICLES

Expanded rubber articles and processes for making such, comprising: partially curing an expandable rubber formulation by heating it in a first mould cavity to form a moulded blank; releasing the moulded blank from the first mould cavity and allowing the moulded blank to expand to form an expanded moulded blank; and further curing and expanding the expanded moulded blank by heating it to form the expanded rubber article comprising an expanded rubber part, wherein the expanded moulded blank is heated in a second mould cavity. Optionally, the expanded moulded blank is contacted with a further rubber formulation and a substrate comprising a base material and an elastomer bonding layer in the second mould cavity to form an expanded rubber article additionally comprising a solid rubber part and a substrate. 14-. (canceled)5. A process for making an expanded rubber article , wherein the process comprises:a) a moulded blank formation step, in which an expandable rubber formulation, comprising an elastomeric material, a curing agent and an expansion agent, is heated in a first mould cavity to partially cure the expandable rubber formulation thereby forming a moulded blank, wherein the first mould cavity confines expansion of the expandable rubber formulation;b) a releasing step, in which the moulded blank is released from the first mould cavity, and in which the moulded blank expands to a volume larger than the volume of the first mould cavity thereby forming an expanded moulded blank;c) a stabilisation step, in which the expanded moulded blank is left to stabilise until the volume of the expanded moulded blank is substantially constant; and,d) a further curing step, in which the stabilised expanded moulded blank is heated to further cure and expand the expandable rubber formulation thereby forming the expanded rubber article;wherein the expanded moulded blank is heated in a second mould cavity in further curing step (d).6. The process according to claim 5 , wherein the ...

POLYOLEFIN-BASED RESIN FOAMED SHEET AND METHOD OF PRODUCING SAME

A polyolefin-based resin foamed sheet includes a polyolefin-based resin, wherein a thickness of the foamed sheet is 0.05-0.5 mm, an apparent density is 200-500 kg/m, a tensile strength at 100% elongation in at least one direction of a longitudinal direction (MD direction) and a width direction (TD direction) of the sheet is 3.5-12 MPa, and a ratio of a tensile breakage strength and the tensile strength at 100% elongation in at least one direction of the MD direction and the TD direction of the sheet is 1.0-1.8. 17.-. (canceled)8. A polyolefin-based resin foamed sheet comprising a polyolefin-based resin , wherein a thickness of the foamed sheet is 0.05-0.5 mm , an apparent density is 200-500 kg/m , a tensile strength at 100% elongation in at least one direction of a longitudinal direction (MD direction) and a width direction (TD direction) of the sheet is 3.5-12 MPa , and a ratio of a tensile breakage strength and the tensile strength at 100% elongation in at least one direction of the MD direction and the TD direction of the sheet is 1.0-1.8.9. The polyolefin-based resin foamed sheet according to claim 8 , wherein a degree of cross linking is 30-50%.10. The polyolefin-based resin foamed sheet according to claim 8 , wherein the polyolefin-based resin is a polyethylene-based resin.11. The polyolefin-based resin foamed sheet according to claim 10 , wherein an average density of the polyethylene-based resin is 905-940 kg/m.12. The polyolefin-based resin foamed sheet according to claim 8 , wherein a 25% compression hardness defined in JIS K6767(1999) is 0.03-0.15 MPa.13. The polyolefin-based resin foamed sheet according to claim 9 , wherein a 25% compression hardness defined in JIS K6767(1999) is 0.03-0.15 MPa.14. The polyolefin-based resin foamed sheet according to claim 10 , wherein a 25% compression hardness defined in JIS K6767(1999) is 0.03-0.15 MPa.15. The polyolefin-based resin foamed sheet according to claim 11 , wherein a 25% compression hardness defined in JIS ...

Method of manufacturing heat-fixing rubber roller and heat-fixing rubber roller

A method of manufacturing a heat-fixing rubber roller includes: forming a rubber layer of a silicone rubber composition on an outer periphery of a metal core shaft, the composition containing water-soluble sugar powder and methylene glycol; vulcanizing the rubber layer; and eluting the sugar powder and the triethylene glycol from the vulcanized rubber layer to form a foam rubber layer.

Expandable composite resin bead

An expandable composite resin bead comprises: a composite resin containing a polyethylene resin and a polystyrene resin; and a blowing agent impregnating the composite resin. The composite resin contains 5 to 20 mass % of the polyethylene resin and 80 to 95 mass % of the polystyrene resin. The blowing agent is an organic physical blowing agent. Furthermore, in the expandable composite resin bead, a predetermined swelling degree in methyl ethyl ketone at a temperature of 23° C. is not lower than 1.25.

FOAM COMPOSITION AND FOAM PRODUCED THEREFROM

A foam composition comprises a recycled polyvinyl butyral in an amount from 5 wt % to 70 wt %; an ethylene-ester copolymer in an amount from 10 wt % to 70 wt %; a foaming agent in an amount from 0.5 wt % to 3.5 wt %; a peroxide crosslinking agent in an amount from 0.5 wt % to 3.0 wt %; and a hydrazide crosslinking agent in an amount from 0.1 wt % to 2.5 wt %, based on a total weight of the foam composition. A foam produced from the foam composition can avoid emitting an unpleasant odor of aldehydes, and the foam also has good mechanical properties and good resilience. 1. A foam composition comprising:a recycled polyvinyl butyral in an amount from 5 wt % to 70 wt % based on a total weight of the foam composition;an ethylene-ester copolymer in an amount from 10 wt % to 70 wt % based on the total weight of the foam composition;a foaming agent in an amount from 0.5 wt % to 3.5 wt % based on the total weight of the foam composition;a peroxide crosslinking agent in an amount from 0.5 wt % to 3.0 wt % based on the total weight of the foam composition; anda hydrazide crosslinking agent in an amount from 0.1 wt % to 2.5 wt % based on the total weight of the foam composition.2. The foam composition as claimed in claim 1 , wherein the hydrazide crosslinking agent is selected from the group consisting of: a monohydrazide compound claim 1 , a dihydrazide compound claim 1 , a polyhydrazide compound claim 1 , and any combination thereof.3. The foam composition as claimed in claim 2 , wherein the hydrazide crosslinking agent is the dihydrazide compound claim 2 , and the dihydrazide compound is selected from the group consisting of: succinic dihydrazide claim 2 , adipic acid dihydrazide claim 2 , azelaic acid dihydrazide claim 2 , sebacic acid dihydrazide claim 2 , and any combination thereof.4. The foam composition as claimed in claim 1 , wherein the peroxide crosslinking agent is selected from the group consisting of: dicumyl peroxide claim 1 , 2 claim 1 ,5-dimethyl-2 claim 1 ,5- ...

FOAM AND MOLDED ARTICLE

This foam has a 25% compressive strength at 23° C. of 90 kPa or lower and an elongation at break at 160° C., measured in accordance with JIS K6251, of 200% or higher. The present invention makes it possible to provide a foam with which it is possible to obtain a molded article having an exceptional appearance even in secondary processing into a complex shape, without harming the flexibility. 1. A foam having a 25% compressive strength at 23° C. of 90 kPa or less and an elongation at break at 160° C. , as measured according to JIS K 6251 , of 200% or more.2. A foam , wherein in a technique to determine proportions of three components , hard , middle , and soft components , by pulsed NMR measurement , a proportion of a hard component at 30° C. is 50% or less relative to all components and a proportion of a middle component at 160° C. is 65% or less relative to all components.3. The foam according to claim 1 , comprisingone or more types of polyolefin-based resins having an endothermic peak, as measured by a differential scanning calorimeter (DSC), present at 160° C. or higher and a melt flow rate (MFR) at 230° C. of 2.0 to 20 g/10 minutes.4. The foam according to claim 1 , obtained by crosslinking and foaming a foamable composition comprising:a polyolefin-based resin having an endothermic peak, as measured by a differential scanning calorimeter (DSC), present at 160° C. or higher and a melt flow rate (MFR) at 230° C. of 2.0 to 20 g/10 minutes in an amount of 10 to 30 mass % relative to the total amount of resin components in the foamable composition;a polyolefin-based resin having an endothermic peak, as measured by a differential scanning calorimeter (DSC), present at 130 to 150° C. and a melt flow rate (MFR) at 230° C. of 0.4 to 2.0 g/10 minutes in an amount of 30 to 50 mass % relative to the total amount of resin components in the foamable composition; anda polyolefin-based resin having an endothermic peak, as measured by a differential scanning calorimeter (DSC), ...

Crosslinked polyolefin foam

A crosslinked polyolefin foam that is a crosslinked foam of a polyolefin resin composition, the composition comprising a polyolefin resin (A) and a rubber (B) having a Mooney viscosity (ML 1+4 , 100° C.) of 15 to 85. The rubber (B) is contained in an amount of 10 to 150 parts by mass relative to 100 parts by mass of the polyolefin resin (A). The foam has a thickness of 1.5 mm or more, a 25% compressive hardness of 60 kPa or less, and a crosslinking degree of at least one of surface layers at both surfaces with a depth of 500 μm from the surface that is at least 5% higher than the crosslinking degree of the middle layer excluding the both surface layers.

POLYOLEFIN-BASED RESIN FOAMED SHEET

A polyolefin-based resin foamed sheet includes a polyolefin-based resin, wherein a thickness of the foamed sheet is 0.05-0.5 mm, a 25% compression hardness defined in JIS K6767(1999) is 20-100 kPa, a ratio of cell sizes in longitudinal and thickness directions is 9-30, a ratio of cell sizes in width and thickness directions is 9-30, and an average cell film thickness in the thickness direction of the foamed sheet is 2-7 μm. 110-. (canceled)11. A polyolefin-based resin foamed sheet comprising a polyolefin-based resin , wherein a thickness of the foamed sheet is 0.05-0.5 mm , a 25% compression hardness defined in JIS K6767(1999) is 20-100 kPa , a ratio of cell sizes in longitudinal and thickness directions is 9-30 , a ratio of cell sizes in width and thickness directions is 9-30 , and an average cell film thickness in the thickness direction of the foamed sheet is 2-7 μm.12. The polyolefin-based resin foamed sheet according to claim 11 , wherein a value of a lower one among tensile strengths in the longitudinal direction and the width direction of the foamed sheet is 5 MPa to 10 MPa.13. The polyolefin-based resin foamed sheet according to claim 11 , wherein an average cell size in the thickness direction of the foamed sheet is 10-20 μm.14. The polyolefin-based resin foamed sheet according to claim 11 , wherein a ratio of an average cell size to an average cell film thickness in the thickness direction of the foamed sheet is 2-10.15. The polyolefin-based resin foamed sheet according to claim 11 , wherein an average cell size averaged with average cell sizes in the longitudinal direction and the width direction of the foamed sheet is 150-500 μm.16. The polyolefin-based resin foamed sheet according to claim 11 , wherein an apparent density of the foamed sheet is 200-500 kg/m.17. The polyolefin-based resin foamed sheet according to claim 11 , wherein a degree of cross-linking of the foamed sheet is 30-50%.18. The polyolefin-based resin foamed sheet according to claim 11 , ...

Curative

A coating created entirely from plant-derived ingredients is disclosed. Illustrative embodiments of the coating may be particularly well suited for use on leather-like materials created from epoxidized natural rubber-based formulations. Illustrative embodiments of the coating created may be comprised of substantially the reaction product between epoxidized vegetable oil and a polyfunctional naturally occurring acid (such as citric acid). Illustrative embodiments this reaction product may be used to produce porosity-free castable resins and vulcanize rubber formulations based on epoxidized natural rubber. Materials made from disclosed materials may be advantageously used as leather substitutes.

FOAM COMPOSITIONS AND USES THEREOF

Components for articles of footwear and athletic equipment are provided including a foam. A variety of foams and foam components and compositions for forming the foams are provided. In some aspects, the foams and components including the foams can have exceptionally high energy return while also having improved durability and softness. In particular, midsoles including the foams are provided for use in an article of footwear. Methods of making the compositions and foams are provided, as well as methods of making an article of footwear including one of the foam components. In some aspects, the foams and foam components can be made by injection molding or injection molding followed by compression molding. 1. A midsole for an article of footwear comprising a crosslinked and foamed composition made by a process comprising crosslinking and foaming a first composition , wherein the first composition comprises:an A-B-A block copolymer, wherein each of the A blocks comprise styrenic repeat units, the B block is a random copolymer of ethylene and a first alpha-olefin having 3 to 8 carbon atoms, and wherein the A-B-A-block copolymer comprises about 10% to about 40% of the A blocks by weight based upon an entire weight of the A-B-A block copolymer;an olefinic block copolymer, wherein the olefinic block copolymer is a copolymer of ethylene and a second alpha-olefin having about 6 to 12 carbon atoms, and wherein the olefinic block copolymer has one or more blocks rich in the ethylene and one or more blocks rich in the second alpha-olefin; andan ethylene-vinyl acetate copolymer,wherein the midsole has (1) a specific density of about 0.08 to about 0.15, (2) an energy return from about 60% to about 85%, (3) a split tear of about 2.5 kg/cm to about 3.5 kg/cm, and (4) an Asker C hardness of about 40 to about 60.2. The midsole according to claim 1 , wherein each of the A blocks consists essentially of polystyrene.3. The midsole according to claim 1 , wherein the B block consists ...

Polypropylenes Having Balanced Strain Hardening, Melt Strength, and Shear Thinning

A composition comprising the reaction product of a polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g′) of at least 0.97, and a melt strength greater than 10 cN determined using an extensional rheometer at 190° C.; and within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic peroxide. Such hyperbranched polypropylenes are useful in films, foamed articles, and thermoformed articles. 1. A composition comprising at least 90 mol % propylene and having a melt strength within the range from 40 cN to 100 cN , and a branching index (g′) of less than 0.97.2. The composition of claim 1 , having an Mz/Mwvalue of greater than 3.0.3. The composition of claim 1 , having an Mwwithin the range from 10 to 20.4. The composition of claim 1 , having a branching index (g′) of less than 0.97.5. The composition of claim 1 , having a melt strength within the range from 40 cN to 100 cN.6. The composition of claim 1 , having a Peak Extensional Viscosity (non-annealed) of greater than 50 kPa·s at a strain rate of 0.01/sec (190° C.).7. The composition of claim 1 , wherein dienes are absent from the composition.8. The composition of claim 1 , further comprising a foaming agent.9. A foamed article comprising the reaction product of the foaming agent and composition of .10. The foamed article of claim 9 , the article selected from of cups claim 9 , plates claim 9 , and food storage boxes.11. The composition of formed by a process comprising combining:{'sub': 'vis', 'a polypropylene comprising at least 90 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g′) of at least 0.97, and a melt strength within a range from 10 to 40 cN determined using an extensional rheometer at 190° C.; and'}within the range from 0.01 to 3 wt % of at least one organic peroxide, by weight of the polypropylene and organic ...

FOAMABLE, MULTICOMPONENT COMPOSITION WHICH FORMS AN INSULATION LAYER AND USE OF SAID COMPOSITION

A foamable, insulating-layer-forming multi-component composition has at least one alkyoxysilane-functional polymer, at least one insulating-layer-forming fire-protection additive, a blowing-agent mixture, and a cross-linking agent. The at least one alkoxysilane-functional polymer contains, as terminal groups and/or as side groups along the polymer chain, alkoxy-functional silane groups of a formula —Si(R)(OR). In this formula, Rstands for a linear or branched C-Calkyl moiety, Rfor a linear or branched C-alkyl moiety and m for an integer from 0 to 2. The composition can be a foam-in-place foam or can be used for the manufacture of molded blocks. 1. A foamable , insulating-layer-forming multi-component composition , comprising at least one alkoxysilane-functional polymer , at least one insulating-layer-forming fire-protection additive , a blowing-agent mixture and a cross-linking agent , {'br': None, 'sup': 1', '2, 'sub': m', '3-m, '—Si(R)(OR)\u2003\u2003(I),'}, 'wherein the at least one alkoxysilane-functional polymer comprises, as a terminal group and/or as a side group along a chain of the polymer, an alkoxy-functional silane group of the general formula (I)'}{'sup': 1', '2, 'sub': 1', '16', '1', '6, 'wherein Ris a linear or branched C-Calkyl moiety, Ris a linear or branched C-Calkyl moiety and m is an integer from 0 to 2,'}wherein individual ingredients of the blowing-agent mixture are separated from one another to inhibit reaction prior to mixing, and the cross-linking agent is separated from the alkoxysilane-functional polymer to inhibit reaction prior to mixing.2. The composition according to claim 1 , wherein the blowing-agent mixture comprises compounds that are capable of reacting with one another claim 1 , if mixed claim 1 , to form carbon dioxide (CO) claim 1 , hydrogen (H) or oxygen (O).3. The composition according to claim 2 , wherein the blowing-agent mixture comprises an acid and a compound that is reactive with the acid to form carbon dioxide.4. The ...

CROSSLINKED POLYOLEFIN RESIN FOAM

The cross-linked polyolefin resin foam of the present invention is obtained by cross-linking and foaming a polyolefin resin composition, the composition including a polyolefin resin-containing resin (A), azodicarbonamide (B), and at least one basic magnesium (C) selected from the group consisting of magnesium oxide and magnesium hydroxide, wherein the amount of basic magnesium (C) included in the polyolefin resin composition is 0.05 to 0.5 parts by mass relative to 100 parts by mass of the resin (A), and the basic magnesium (C) has an average particle diameter of 0.1 to 15 μm. 1. A cross-linked polyolefin resin foam obtained by cross-linking and foaming a polyolefin resin composition , the composition comprising a polyolefin resin-containing resin (A) , azodicarbonamide (B) , and at least one basic magnesium (C) selected from the group consisting of magnesium oxide and magnesium hydroxide ,wherein the amount of the basic magnesium (C) included in the polyolefin resin composition is 0.05 to 0.5 parts by mass relative to 100 parts by mass of the resin (A), andthe basic magnesium (C) has an average particle diameter of 0.1 to 15 μm.2. The cross-linked polyolefin resin foam according to claim 1 , wherein the amount of the azodicarbonamide (B) included in the polyolefin resin composition is 3 to 12 parts by mass relative to 100 parts by mass of the resin (A).3. The cross-linked polyolefin resin foam according to claim 1 , wherein the resin (A) comprises 50 mass % or more of a polypropylene resin as the polyolefin resin.4. The cross-linked polyolefin resin foam according to claim 3 , wherein the resin (A) further comprises 1 to 50 mass % of a polyethylene resin as the polyolefin resin.5. The cross-linked polyolefin resin foam according to claim 1 , wherein the foam has a density of 0.02 to 0.20 g/cm.6. A vehicle interior member obtained by further forming the cross-linked polyolefin resin foam according to .7. A method of manufacturing a cross-linked polyolefin resin foam ...

IMPROVEMENTS IN AND RELATING TO EXPANDED RUBBER ARTICLES

Expanded rubber articles () and processes for making such, comprising: partially curing an expandable rubber formulation () by heating it in a first mould cavity () to form a moulded blank (); releasing the moulded blank () from the first mould cavity () and allowing the moulded blank () to expand to form an expanded moulded blank (); and further curing and expanding the expanded moulded blank () by heating it to form the expanded rubber article () comprising an expanded rubber part (), wherein the expanded moulded blank () is heated in a second mould cavity (). Optionally, the expanded moulded blank () is contacted with a further rubber formulation () and a substrate comprising a base material () and an elastomer bonding layer () in the second mould cavity () to form an expanded rubber article additionally comprising a solid rubber part () and a substrate (). 133-. (canceled)34. A process for making an expanded rubber article , wherein the expanded rubber article is a moulded tyre , the process comprising:a) a moulded blank formation step, in which an expandable rubber formulation, comprising an elastomeric material, a curing agent and an expansion agent, is heated in a first mould cavity to partially cure the expandable rubber formulation thereby forming a moulded blank, wherein the first mould cavity confines expansion of the expandable rubber formulation;b) a releasing step, in which the moulded blank is released from the first mould cavity, and in which the moulded blank expands to a volume larger than the volume of the first mould cavity thereby forming an expanded moulded blank; and,c) a further curing step, in which the expanded moulded blank is heated to further cure and expand the expandable rubber formulation thereby forming the expanded rubber article;wherein the expanded moulded blank is heated in a second mould cavity in further curing step (c).35. The process according to claim 34 , wherein the elastomeric material comprises one or more rubber ...

Method of Foaming a Milled Precursor

A method of making a foamed article comprises (a) milling a block or sheet of thermoplastic polymer to form a precursor; (b) crosslinking the thermoplastic polymer; (c) heating the precursor to a first temperature to soften the thermoplastic polymer; (d) infusing the thermoplastic polymer with at least one inert gas at a first pressure that is sufficient to cause the at least one inert gas to permeate into the softened thermoplastic polymer; and (e) while the thermoplastic polymer is softened, reducing the pressure to a second pressure below the first pressure to at least partially foam the precursor into a foamed article, wherein the foamed article is substantially the same shape as the precursor. 1. A method of making a foamed article , comprising:a) milling a block or sheet of thermoplastic polymer to form a precursor;b) crosslinking the thermoplastic polymer;c) heating the precursor to a first temperature to soften the thermoplastic polymer;d) infusing the thermoplastic polymer with at least one inert gas at a first pressure that is sufficient to cause the at least one inert gas to permeate into the softened thermoplastic polymer; and 'wherein the foamed article is substantially the same shape as the precursor.', 'e) while the thermoplastic polymer is softened, reducing the pressure to a second pressure below the first pressure to at least partially foam the precursor into a foamed article,'}2. A method according to claim 1 , further comprising:f) cooling the thermoplastic polymer to a second temperature; andg) reducing the pressure to atmospheric pressure.3. A method according to wherein the second temperature is ambient temperature.4. A method according to wherein the thermoplastic polymer comprises an elastomer.5. A method according to wherein the infused thermoplastic polymer comprises an amount of the absorbed inert gas sufficient to produce at least partial forming in a subsequent step when the thermoplastic polymer is again heated to a temperature which ...

RESIN COMPOSITION TO BE CROSS-LINKED AND FOAMED

The resin composition to be cross-linked and foamed contains a thermoplastic resin, a cross-linking agent, and a foaming agent, and further contains a fatty acid and a fatty acid ester. 1. A resin composition to be cross-linked and foamed , the resin composition comprising: a thermoplastic resin; a cross-linking agent; and a foaming agent; the resin composition further comprising:a fatty acid; and a fatty acid ester.2. The resin composition of claim 1 , whereinthe thermoplastic resin is at least one selected from the group consisting of a polyolefin-based elastomer (POE), an olefin block copolymer (OBC), an ethylene-vinyl acetate (EVA) copolymer, a polyamide (PA), a polyether block amide (PEBA), and a styrene-based thermoplastic elastomer (TPS).3. The resin composition of claim 1 , whereina sum of a content of the fatty acid and a content of the fatty acid ester ranges from 0.5 parts by mass to 4.0 parts by mass relative to 100 parts by mass of the thermoplastic resin.4. The resin composition of claim 3 , whereinthe content of the fatty acid ranges from 0.25 mass % to 1.0 mass %.5. The resin composition of claim 3 , whereinthe content of the fatty acid ester ranges from 0.25 mass % to 3.0 mass %.6. The resin composition of claim 1 , whereinthe fatty acid is at least one selected from the group consisting of stearic acid, lauric acid, and myristic acid.7. The resin composition of claim 1 , whereinthe fatty acid ester is at least one of a polyhydric alcohol fatty acid ester or a higher fatty acid ester.8. A cross-linked foam formed from the resin composition of .9. The cross-linked foam of with a specific gravity of 0.6 g/cmor less.10. The cross-linked foam of for a midsole of a shoe. This application claims priority to Japanese Patent Application No. 2021-028438 filed on Feb. 25, 2021, the entire disclosure of which is incorporated by reference herein.The present disclosure relates to a resin composition to be cross-linked and foamed into a cross-linked foam used for ...

METHOD TO DIRECT COMPOUND EXTRUDED STRUCTURE FOR THE PRODUCTION OF IRRADIATION CROSSLINKED POLYPROPYLENE FOAM

Described herein are methods and processes of manufacturing irradiation crosslinked polypropylene foam. In some embodiments, this includes extrusion of all material components, including a liquid crosslinking agent, to manufacture extruded structures for production of irradiation crosslinked polypropylene foam. 1. A method of manufacturing an extruded structure , comprising:introducing resin into a feeder of an extruder;injecting a liquid crosslinking agent into the extruder using an injector at a location downstream of the feeder within 4 to 8 screw diameters of an axial length of the extruder;introducing a chemical blowing agent into the extruder at a location downstream of the location where the liquid crosslinking agent is injected into the extruder; andextruding a structure from the extruder.2. The method of claim 1 , further comprising irradiating the extruded structure to produce a crosslinked extruded structure.3. The method of claim 2 , further comprising foaming the crosslinked extruded structure to produce a foam structure.4. The method of claim 3 , wherein the foaming includes pre-heating the crosslinked extruded structure.5. The method of claim 4 , wherein the foaming includes using a salt bath as a heat source to activate the chemical blowing agent in the crosslinked extruded structure.6. The method of claim 3 , wherein the foaming includes using at least one of a radiant heater claim 3 , a hot air oven claim 3 , or microwave energy as a heat source to activate the chemical blowing agent in the crosslinked extruded structure.7. The method of claim 1 , wherein the chemical blowing agent is introduced into the extruder through a side stuffer downstream of a location where the liquid crosslinking agent is injected into the extruder.8. The method of claim 1 , wherein the resin introduced into the feeder has a non-powder form.9. The method of claim 8 , wherein the resin is formed as pellets claim 8 , granules claim 8 , chips claim 8 , flakes claim 8 , beads ...

FORMAMIDE-FREE FOAM AND METHOD FOR PREPARING THE SAME

A formamide-free foam prepared by using sodium bicarbonate as a foaming agent and electron-beam irradiation for crosslinking is revealed. After copolymer and sodium bicarbonate being mixed evenly, the mixture is heated and compounded to form an intermediate. Then the intermediate is pressed and injected to form a sheet. Next the intermediate is irradiated by an electron-beam to form crosslinks therein. At last the intermediate is heated and foamed to get a formamide-free foam. Compared with foam produced by using azodicarbonamide as the foaming agent available now, formamide-free foam not only causes no harm to human health but also gives no negative effect to the environment during recycling. Thus the formamide-free foam is really environmentally friendly. 1. A method for preparing a formamide-free foam comprising the steps of:compounding ethylene vinyl alkanoate copolymer with a weight percent of 50%-95% and a foaming agent with a weight percent of 5%-50% to get an intermediate; wherein the foaming agent is sodium bicarbonate;pressing and injecting the intermediate;irradiating the intermediate by an electron beam to carry out crosslinking of the intermediate; andheating and foaming the intermediate to get the formamide-free foam.2. The method as claimed in claim 1 , wherein the formamide-free foam further includes a polyolefin copolymer;wherein a weight percent of a mixture of the ethylene vinyl alkanoate copolymer and the sodium bicarbonate is ranging from 40% to 60% while a weight percent of the polyolefin copolymer is ranging from 40% to 60%.3. The method as claimed in claim 1 , wherein the ethylene vinyl alkanoate copolymer is ethylene vinyl acetate (EVA) copolymer.4. The method as claimed in claim 2 , wherein the polyolefin copolymer includes polyethylene (PE) copolymer and polypropylene (PP) copolymer.5. The method as claimed in claim 1 , wherein compounding temperature is ranging from 80° C. to 130° C. in the step of compounding.6. The method as claimed in ...

SILICONE COMPOSITION FOR ELASTOMER FOAM

Organopolysiloxane compositions are described that are crosslinkable by polyaddition and that can produce a silicone elastomer foam (or “silicone foam”) having a low density, i.e. a density of less than 0.20 g/cm, and having good mechanical properties and a good fire resistance. 1. An organopolysiloxane composition X that is a precursor of a silicone foam M , the composition X comprising:a. at least one organopolysiloxane A exhibiting, per molecule, at least two C2 C6 alkenyl groups bonded to the silicon,b. at least one organopolysiloxane B exhibiting, per molecule, at least two SiH units,c. a catalytically effective amount of at least one hydrosilylation catalyst C,d. at least one porogenic agent D, which is water or an aqueous emulsion,{'sup': 2', '2, 'e. at least about 3% by weight, with respect to the total amount of the composition X, of at least one inorganic filler E, which is a fumed silica, the specific surface of which is from about 100 m/g to about 300 m/g,'}f. at least 6% by weight, with respect to the total amount of the composition X, of at least one inorganic filler F, which is a ground quartz, andg. at least one heat-resistance additive J,wherein the ratio by weight of the quartz F to the fumed silica E is from about 0.5 to about 4.2. The organopolysiloxane composition X as claimed in claim 1 , wherein the amount of inorganic filler E is from about 3% to about 14% by weight of said composition X.3. The organopolysiloxane composition X as claimed in claim 1 , wherein the amount of inorganic filler F is from about 6% to about 25% by weight of said composition X.4. The organopolysiloxane composition X as claimed in claim 1 , wherein the ratio by weight of the quartz F to the fumed silica E is from about 1 to about 3.6.5. The organopolysiloxane composition X as claimed in claim 1 , further comprising an organopolysiloxane gum G comprising at least two C2 C6 alkenyl groups bonded to the silicon.6. The organopolysiloxane composition X as claimed in claim 1 ...

Gas Generating Agent, And Method For Producing Foam Using The Same

The gas generating agent of the present invention comprises an oxalic acid salt of an aminoguanidine compound represented by general formula (1) below. 1. (canceled)2. The foamable composition according to claim 5 , wherein in the oxalic acid salt of the aminoguanidine compound claim 5 , a molar ratio of the aminoguanidine compound to oxalic acid (aminoguanidine compound:oxalic acid) is in a range of 1:1 to 2:1.3. The foamable composition according to claim 5 , wherein the aminoguanidine compound is aminoguanidine.4. The foamable composition according to claim 5 , wherein the gas generating agent is a microcapsule-based agent.6. The foamable composition according to claim 5 , wherein the material to be foamed is a thermoplastic resin and/or a rubber.7. A method for producing a foam claim 5 , comprising a step of heating the foamable composition according to .8. A foam claim 5 , wherein the foam obtained by foaming the foamable composition according to . This application is a divisional of prior application Ser. No. 15/567,910, filed Oct. 19, 2017, which is a U.S. national phase application filed under 35 U.S.C. § 371 of International Application PCT/JP2016/061802, filed Apr. 12, 2016, designating the United States, which claims priority from Japanese Application Number 2015-088657, filed Apr. 23, 2015.The present invention relates to a gas generating agent and a method for producing a foam of a thermoplastic resin, a rubber, or the like using the gas generating agent.Azodicarbonamide (hereinafter also referred to as “ADCA”), which is a typical gas generating agent, is a compound used in a broad range of applications as a chemical blowing agent for plastics and rubbers in general.Advantages of ADCA include that the amount of generated gas is 200 mL/g or more and is larger than that of other commercially available chemical blowing agents, that the degradation starting temperature can be lowered to near 140° C. by using a blowing auxiliary in combination although the ...

Crosslinked polyolefin foam having large core cells

A closed cell crosslinked polyolefin foam sheet comprises an opposing first surface region and second surface region, and an intermediate region disposed therebetween, wherein the intermediate region is configured to have a gel content lower than an average gel content of the first surface region and the second surface region to enable a controlled tear propagation within the intermediate region when a splitting force is applied to the closed cell crosslinked polyolefin foam sheet. For example, a ratio of a gel content of the intermediate region versus an average gel content of the first surface region and the second surface region may be about 75% or less, and a ratio of the average cell size of the intermediate region versus an average cell size of the first surface region and the second surface region may be about 125% or higher.

COEXTRUDED, CROSSLINKED MULTILAYER POLYOLEFIN FOAM STRUCTURES FROM RECYCLED METALLIZED POLYOLEFIN MATERIAL AND METHODS OF MAKING THE SAME

A physically crosslinked, closed cell continuous multilayer foam structure comprising at least one polypropylene/polyethylene coextruded foam layer is obtained. The multilayer foam structure is obtained by coextruding a multilayer structure comprising at least one foam composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure. 1. A multilayer foam structure comprising:a coextruded first foam layer comprising polypropylene or polyethylene; and 5-75 wt. % recycled metallized polyolefin material; and', '25-95 wt. % polypropylene, polyethylene, or a combination of polypropylene and polyethylene., 'a coextruded second foam layer on a side of the first foam layer, the second foam layer comprising2. The multilayer foam structure of claim 1 , further comprising a coextruded third foam layer on a side of the second foam layer opposite the first foam layer claim 1 , the third foam layer comprising polypropylene or polyethylene.3. The multilayer foam structure of claim 1 , wherein the first foam layer and the third foam layer are substantially free of recycled polyolefin material.4. The multilayer foam structure of claim 2 , wherein the first layer and third layer comprise polypropylene and polyethylene.5. The multilayer foam structure of claim 1 , wherein the first layer comprises polypropylene with a melt flow index of 0.1-25 grams per 10 minutes at 230° C.6. The multilayer foam structure of claim 1 , wherein the first layer comprises polyethylene with a melt flow index of 0.1-25 grams per 10 minutes at 190° C.7. The multilayer foam structure of claim 1 , wherein the density of the multilayer foam structure is 20-250 kg/m.8. The multilayer foam structure of claim 1 , wherein the multilayer foam structure has a crosslinking degree of 20-75%.9. The multilayer foam structure of claim 1 , wherein the multilayer foam structure has an average closed cell size of 0.05-1.0 mm.10. The multilayer foam structure ...

Localized silicone heat shielding for extension dash panels

A method for making an insulated vehicle extension dash panel includes injection molding an extension dash panel from a structural polymer. The method further includes adding a plurality of components to a mixer to form an insulating foaming layer. The plurality of components includes a two-part liquid silicone compound, a catalyst, and a foaming agent. A screw is then coupled to the mixer and the insulating foaming layer is injection molded to an inner face of the extension dash panel. The insulating foaming layer is then cured to the inner face of the extension dash panel to form the insulated vehicle extension dash panel.

WATER EXPANDABLE POLYMER BEADS

The present invention relates to a process for the preparation of water expandable polymer beads, which process comprises the steps of: a) providing a starting composition comprising styrene and a cross-linking agent containing a hydrophilic polymer chain and at least two hydrolysable end-groups having a carbon-to-carbon double bond, b) prepolymerizing the starting composition to obtain a prepolymer composition, c) adding an aqueous dispersion of a modifier-free nanoclay to the prepolymer composition to obtain an inverse emulsion, d) suspending the inverse emulsion obtained by step c) in an aqueous medium to yield an aqueous suspension of suspended droplets and e) polymerizing the monomers in the droplets of the suspension obtained by step d) to obtain the water expandable polymer beads. 1. A process for the preparation of water expandable polymer beads , which process comprises the steps of:a) providing a starting composition comprising styrene and a cross-linking agent containing a hydrophilic polymer chain and at least two hydrolysable end-groups having a carbon-to-carbon double bond,b) prepolymerizing the starting composition to obtain a prepolymer composition,c) adding an aqueous dispersion of a modifier-free nanoclay to the prepolymer composition to obtain an inverse emulsion,d) suspending the inverse emulsion obtained by step c) in an aqueous medium to yield an aqueous suspension of suspended droplets ande) polymerizing the monomers in the droplets of the suspension obtained by step d) to obtain the water expandable polymer beads.2. The process according to claim 1 , wherein the cross-linking agent has a molecular weight Mn of at least 300.3. The process according to claim 1 , wherein the hydrophilic polymer chain of the cross-linking agent is chosen from polyethers claim 1 , poly(meth)acrylates claim 1 , polyamides claim 1 , polyacrylamides claim 1 , polyesters claim 1 , poly(lactams) claim 1 , polyurethanes claim 1 , polyvinyl chlorides claim 1 , ...

HEAT-CONDUCTING FOAM SHEET FOR ELECTRONIC INSTRUMENTS AND HEAT-CONDUCTING LAMINATE FOR ELECTRONIC INSTRUMENTS

Provided is a heat conductive foam sheet for electronic equipment sufficiently thin and flexible to be suitably used in the interior of electronic equipment and excellent in heat conductivity. A heat conductive foam sheet for electronic equipment containing a heat conductor in an elastomer resin portion constituting the foam sheet, in which the content of the heat conductor relative to 100 parts by mass of the elastomer resin is 100 to 500 parts by mass, the 25% compressive strength of the foam sheet is 200 kPa or less and the thickness thereof is 0.05 to 1 mm. 114-. (canceled)15. A heat conductive laminate for electronic equipment , which has a heat conductive sheet having a heat conductivity of 200 W/m·K or more on at least one of the surfaces of a foam sheet having a 25% compressive strength of 50 to 190kPa , a thickness of 0.05 to 1.0 mm and an apparent density of 0.1 to 1.5 g/cm; and which has a thickness of 0.08 to 1.50 mm , wherein the foam sheet is constituted of a elastomer resin.16. The heat conductive laminate for electronic equipment according to claim 15 , wherein the elastomer resin constituting the foam sheet contains at least one heat conductive filler selected from the group consisting of aluminum oxide claim 15 , magnesium oxide claim 15 , boron nitride claim 15 , talc and aluminum nitride.17. The heat conductive laminate for electronic equipment according to claim 16 , wherein the content of the heat conductive filler relative to 100 parts by mass of the elastomer resin is 100 to 500 parts by mass.18. The heat conductive laminate for electronic equipment according to claim 15 , wherein the expansion ratio of the foam sheet is 1.5 to 6.19. The heat conductive laminate for electronic equipment according to claim 15 , wherein the heat conductive sheet is a sheet of one selected from copper claim 15 , aluminum and graphite.20. The heat conductive laminate for electronic equipment according to claim 15 , wherein the elastomer resin constituting the ...

Vehicle tyre, the tread of which comprises a heat-expandable rubber composition

A vehicle tyre includes a tread formed of a rubber composition that is heat-expandable when unvulcanized, and expanded when vulcanized. When unvulcanized, the composition includes from 50 to 100 phr of a copolymer based on styrene and butadiene; optionally from 0 to 50 phr of another diene elastomer, such as a polybutadiene or a natural rubber; more than 50 phr of a reinforcing filler, such as silica and/or carbon black; between 5 and 25 phr of a sodium- or potassium-including carbonate or hydrogencarbonate; and between 2 and 15 phr of a carboxylic acid having a melting point between 60° C. and 220° C., such as citric acid. A total content of the carboxylic acid and the carbonate or the hydrogencarbonate is greater than 10 phr. Presence of the carboxylic acid and the carbonate or the hydrogencarbonate makes it possible to significantly reduce noise emitted by the tyre during running.

RUBBER-BASED PRESSURE SENSITIVE ADHESIVE FOAM

The present disclosure relates to a pressure sensitive adhesive foam comprising a rubber-based elastomeric material, at least one hydrocarbon tackifier and a crosslinking additive selected from the group of multifunctional (meth)acrylate compounds. The present disclosure also relates to a method of manufacturing such a pressure sensitive adhesive foam and uses thereof. 1. A pressure sensitive adhesive foam comprising a rubber-based elastomeric material , at least one hydrocarbon tackifier , a crosslinking additive selected from the group of multifunctional (meth)acrylate compounds , and a filler material selected from the group consisting of microspheres , expandable microspheres , gaseous cavities , glass beads , glass microspheres , glass bubbles and any combinations or mixtures thereof.2. (canceled)3. A pressure sensitive adhesive foam according to claim 1 , wherein the multifunctional (meth)acrylate compound comprises at least two (meth)acryloyl groups claim 1 , in particular three or four (meth)acryloyl groups claim 1 , more in particular three (meth)acryloyl groups.4. A pressure sensitive adhesive foam according to claim 1 , wherein the multifunctional (meth)acrylate compound has the following Formula:{'br': None, 'sub': 2', '2', 'n, 'sup': 1', '2', '1, 'HC═C(R)—(CO)—O—R—[O—(CO)—(R)C═CH]'}{'sup': 1', '2, 'wherein Ris hydrogen or methyl; n is 1, 2, 3 or 4; and Ris an alkylene, arylene, heteroalkylene, or any combinations thereof.'}5. A pressure sensitive adhesive foam according to claim 1 , wherein the multifunctional (meth)acrylate is selected from the group consisting of 1 claim 1 ,6-hexanediol di(meth)acrylate claim 1 , trimethylolpropane tri(meth)acrylate claim 1 , and any combinations or mixtures thereof.6. A pressure sensitive adhesive foam according to claim 1 , which is crosslinked.7. A pressure sensitive adhesive foam according to claim 1 , wherein the rubber-based elastomeric material is selected from the group consisting of halogenated butyl rubbers; ...

POLY(3-HYDROXYALKANOATE) FOAM PARTICLES AND POLY(3-HYDROXYALKANOATE) FOAM MOLDED ARTICLE

Provided are poly(3-hydroxyalkanoate) foam particles in which a gel fraction of the whole foam particles is from 30 to 80% by weight and a difference in gel fraction between inside and outside of the foam particles is 25% by weight or less. Preferably, the foam particles are particles crosslinked by an organic peroxide. Preferably, the organic peroxide has a 1 hour half-life temperature of 114 to 124° C., contains a carbonate group, and is liquid at room temperature. 1. A poly(3-hydroxyalkanoate) foam particle , wherein a gel fraction of a whole foam particle is from 30 to 80% by weight , and a difference between a gel fraction inside of the foam particle and a gel fraction outside of the foam particle is 25% by weight or less.2. The poly(3-hydroxyalkanoate) foam particle according to claim 1 , wherein a weight per piece of the foam particle is from 0.3 to 10 mg claim 1 , and a length/diameter ratio of the foam particle is from 0.5 to 2.5.3. The poly(3-hydroxyalkanoate) foam particle according to claim 1 , wherein the poly(3-hydroxyalkanoate) is at least one selected from the group consisting of poly(3-hydroxybutyrate) claim 1 , poly(3-hydroxybutyrate-co-3-hydroxyvalerate) claim 1 , poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) claim 1 , poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) claim 1 , and poly(3-hydroxybutyrate-co-4-hydroxybutyrate).4. The poly(3-hydroxyalkanoate) foam particle according to claim 1 , wherein the poly(3-hydroxyalkanoate) is a copolymer of 3-hydroxybutyrate and a comonomer claim 1 , and a 3-hydroxybutyrate/comonomer ratio in the copolymer is from 99/1 to 80/20 (mol %/mol %).5. The poly(3-hydroxyalkanoate) foam particle according to claim 1 , wherein the poly(3-hydroxyalkanoate) is crosslinked by an organic peroxide.6. The poly(3-hydroxyalkanoate) foam particle according to claim 5 , wherein the organic peroxide has a 1 hour half-life temperature of 114 to 124° C. claim 5 , contains a carbonate group claim 5 , and is liquid ...

POLYURETHANE FOAM

A polyurethane foam is disclosed having unique load bearing characteristics rendering it suitable for a variety of applications. The foam exhibits high surface-softness and smoothness properties, making it well-suited for use in articles such as pillows and mattress toppers. However, upon continued application of pressure, the resilience of the foam increases sharply, translating into a remarkable support characteristics that make the foam suitable for use in the seat portions of chairs and sofas, as well as in the base portion of mattresses. The foams therefore address the limitations of conventional, high-resilience and visco-elastic polyurethane foams. A process of making the foam and its use in various articles is also disclosed. 1. A process for the preparation of a polyurethane foam , the process comprising the steps of: i. at least one polyol having an average molecular weight of 6,000-12,000 Da, wherein the polyol has an OH functionality of 2-4,', 'ii. at least one methylene diphenyl diisocyanate having an NCO content of 26-33%, wherein the amount of diisocyanate relative to the amount of polyol is sufficient to give an ISO index of 72-110,', 'iii. at least one surfactant in an amount of 0.4-1.0 per hundred parts polyol,', 'iv. at least one amine catalyst in an amount of 0.2-0.6 per hundred parts polyol,', 'v. water in an amount of 1.5-4.0 per hundred parts polyol, and', 'vi. optionally at least one flame retardant in an amount of 4.0-15.0 per hundred parts polyol;, 'a) mixing together the following ingredients in the amounts specifiedb) curing the mixture resulting from step a).2. The process of claim 1 , wherein the ingredients specified in step a) are mixed at a speed of 2 claim 1 ,000-8 claim 1 ,000 rpm.3. The process of claim 1 , wherein the polyol has a molecular weight of 7 claim 1 ,500-8 claim 1 ,500 Da claim 1 , and the polyol is a polyether polyol and/or has an OH functionality of 2.8-3.2.45-. (canceled)6. The process of claim 1 , wherein the ...

SILICONE FOAM COMPOSITIONS RAPIDLY CROSS-LINKABLE AT AMBIENT TEMPERATURES AND METHODS OF MAKING AND USING SAME

Provided are rapidly cross-linkable silicone foam compositions, kits, and methods for filling implanted medical devices in situ or in vivo, the implanted medical devices, including for example, body implants and tissue expanders, the compositions including a platinum divinyl disiloxane complex; a low viscosity vinyl terminated polydimethylsiloxane; a low viscosity hydride terminated polydimethylsiloxane; a silicone cross-linker; and a gas and/or gas-filled microcapsules, where the rapidly cross-linkable silicone foam composition has a viscosity of ≤150 cPs for ≥1 min. post-preparation and ≤300 cPs≤5 min. post-preparation, at ambient temperature. 1. A two-part , rapidly cross-linkable silicone foam composition , comprising: a first low viscosity vinyl terminated polydimethylsiloxane present in an amount of from about 97 wt % to about 99.5 wt % based on the weight of the catalyst fluid and having a viscosity of from about 1 to about 150 cPs, and', {'sub': 2', '3', '2', '3', '2', '2', '3, 'a platinum divinyl disiloxane complex comprising Pt[(CH═CH)(CH)SiOSi(CH)(CH═CH)]having a platinum content of from about 2 ppm to about 32 ppm based on the catalyst fluid,'}, 'wherein the catalyst fluid has a viscosity of from about 1 to about 150; and, 'a catalyst fluid comprising'} a second low viscosity vinyl terminated polydimethylsiloxane present in an amount of from about 1 wt % to about 40 wt % based on the weight of the cross-linker suspension and having a viscosity of from about 1 to about 150 cPs,', 'a low viscosity hydride terminated polydimethylsiloxane present in an amount of from about 60 wt % to about 90 wt % based on the weight of the cross-linker suspension and having a viscosity of from about 1 to about 150 cPs,', 'a silicone cross-linker comprising polymethylhydrosiloxane polydimethylsiloxane copolymer present in an amount of from about 0.32 wt % to about 5.0 wt % based on the weight of the cross-linker suspension, and having a viscosity of from about 1 to about 150 ...

Sacrificial Templates Comprising a Hydrogel Cross-linking Agent and Their Use for Customization of Hydrogel Architecture

Described herein are sacrificial templates generated from water soluble thermoplastic-divalent cation-composite materials, such as poly(vinyl alcohol)-calcium. Also described herein are methods for the use of such sacrificial templates in casting of precise internal space microarchitectures within hydrogels, such as microchannel networks within alginate hydrogels. 1. A method for controlled fabrication of internal spaces in a biocompatible hydrogel comprising:(i) providing a sacrificial template that has a predefined shape and is immobilized within a casting chamber, wherein the sacrificial template comprises a water-soluble thermoplastic-divalent cationic salt composite material; and(ii) introducing into the casting chamber a volume of hydrogel polymer solution comprising a hydrogel polymer that is cross-linkable by divalent cations, wherein the volume is sufficient to surround the sacrificial template;whereby, (a) divalent cations diffuse out of the sacrificial template and cross-link the hydrogel polymer in the solution contacting the sacrificial template to form a hydrogel shell conforming to the shape of the sacrificial template; and (b) subsequent to formation of the hydrogel shell, the sacrificial template dissolves to form one or more internal spaces corresponding to the predefined shape.2. The method of claim 1 , wherein the water-soluble thermoplastic in the water-soluble thermoplastic-divalent cation composite material is selected from among poly(vinyl alcohol) claim 1 , poly(ethylene-oxide) claim 1 , poly(ethylene glycol) claim 1 , poly(lactic acid) claim 1 , poly(glycolic acid) claim 1 , and combinations thereof.3. The method of claim 2 , wherein water-soluble thermoplastic is poly(vinyl alcohol).4. The method of claim 3 , wherein the poly(vinyl alcohol)-divalent cationic composite material comprises calcium cations claim 3 , magnesium cations claim 3 , or barium cations.5. The method of claim 4 , wherein the poly(vinyl alcohol)-divalent cationic ...

Polyfunctional alcohols as cross-linkers in pmi foams

The invention relates to the production of PMI foams, more particularly to their formulating ingredients, which lead to particular facility in adjusting the density at given foaming temperature.

POLYPROPYLENE-TYPE RESIN PRE-EXPANDED PARTICLES, AND METHOD FOR PRODUCING SAID PRE-EXPANDED PARTICLES

Pre-expanded polypropylene-based resin particles include a polypropylene-based resin. The polypropylene-based resin satisfies tan δ≤0.32×V+0.1, where tan δ represents a loss tangent at an angular frequency of 0.1 rad/s in dynamic viscoelastic behavior measurement at 200° C. and V represents a melt fracture take-up speed (m/min) at 200° C. 1. Pre-expanded polypropylene-based resin particles comprising a polypropylene-based resin ,wherein the polypropylene-based resin satisfies tan δ≤0.32×V+0.1, where tan δ represents a loss tangent at an angular frequency of 0.1 rad/s in dynamic viscoelastic behavior measurement at 200° C. and V represents a melt fracture take-up speed (m/min) at 200° C.2. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein tan δ is 0.50 to 1.80.3. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein V is 2.5 to 7.0 (m/min).4. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein a melt flow rate of the polypropylene-based resin is 1.0 g/10 minutes to 10.0 g/10 minutes.5. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein a melting point of the polypropylene-based resin is 135° C. to 155° C.6. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein an internal open cell ratio of the pre-expanded polypropylene-based resin particles is not more than 40%.7. The pre-expanded polypropylene-based resin particles according to claim 6 , wherein the internal open cell ratio of the pre-expanded polypropylene-based resin particles is not more than 30%.8. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein an open cell ratio of the pre-expanded polypropylene-based resin particles is not more than 6%.9. The pre-expanded polypropylene-based resin particles according to claim 1 , wherein a melt tension of the polypropylene-based resin is not more than 12 cN.10. A method for ...

SUPERABSORBENT STRUCTURE

Provided is a superabsorbent structure based on a covalently crosslinked copolymer having a microstructure of a HIPE, and characterized by hydrophobic and hydrophilic segments of at least five residues; the unique chemical and structural properties of the copolymer afford a polymeric superabsorbent structure that is capable of swelling in polar as well as apolar media. Also provided are processes of manufacturing the superabsorbent structure, and uses thereof. 1. A superabsorbent structure , comprising a covalently crosslinked copolymer having a microstructure templated by an external phase of a high internal phase emulsion (HIPE) , wherein said crosslinked copolymer is characterized by:a) at least one network of covalently crosslinked chains, said crosslinked chains comprise hydrophobic sections and hydrophilic sections, each of said sections is a continuous chain of at least five residues long;b) a ratio of residues of said hydrophilic sections to residues of said hydrophobic sections, ranging from 1:9 to 9:1; andc) a total of said residues of said hydrophilic sections and said residues of said hydrophobic sections that is at least 30% of a total of residues in said network,said crosslinked copolymer is capable of swelling in a polar medium and in an apolar medium, andwherein said network comprises contiguous chains of at least one hydrophilic section and at least one hydrophobic section.24-. (canceled)5. The structure of claim 1 , wherein claim 1 , said contiguous chains are separated by at least one residue of a crosslinking monomer.6. The structure of claim 1 , wherein said contiguous chain is selected from the group consisting of a diblock copolymer claim 1 , a triblock copolymer claim 1 , and an alternating multiblock copolymer.7. The structure of claim 6 , wherein said triblock copolymer comprises two of said hydrophilic sections separated by said hydrophobic section.8. The structure of claim 7 , wherein each of said sections is at least 60 residues long.9. ...

Composite Carrier for Immobilization of Proteins, Polypeptides or Oligopeptides, Preparation Methods and Application Thereof

Provided are a composite carrier for immobilization of a protein, polypeptide or oligopeptide, a preparation method and an application thereof. The composite carrier is a porous material which comprises: (1) a porous organic foam material containing open pores; and (2) a crosslinked product having aldehyde groups and immobilized on the surface of the walls of one or more pores of the porous organic foam material, wherein the aldehyde groups are able to react with the protein, polypeptide or oligopeptide, and the crosslinked product are formed by chitosan via a crosslinking reaction with a polyaldehyde compound. 1. A porous composite carrier for immobilization of a protein , polypeptide or oligopeptide , comprising:a) a porous organic foam material containing open pores; andb) a crosslinked product having aldehyde groups and immobilized on the surface of the walls of one or more pores of the porous organic foam material, wherein the aldehyde groups are able to react with the protein, polypeptide or oligopeptide, and the crosslinked product is formed by chitosan via a crosslinking reaction with polyaldehyde compounds.2. The composite carrier according to claim 1 , wherein the organic foam material is melamine foam.3. The composite carrier according to claim 1 , wherein the composite carrier is in a form of granules claim 1 , straps claim 1 , sheets claim 1 , blocks or columns.4. A method for preparation of the composite carrier according to claim 1 , wherein the method comprises the following steps:a) providing a porous organic foam material containing open pores;b) precipitating a chitosan onto a surface of walls of one or more pores of the porous organic foam material; andc) crosslinking the precipitated chitosan with a polyaldehyde compound to form the composite carrier.5. The method according to claim 4 , wherein in step b) claim 4 , the chitosan is precipitated onto the surface by reacting with an alkaline.6. The method according to claim 4 , wherein the ...

Method and thermoplastic foamed article

A method for making a low density foamed article includes placing a desired amount of thermoplastic polyurethane foam beads in a cavity of an injection mold and closing the mold; combining in an extruder connected to the mold a molten polymer selected from the group consisting of thermoplastic polyurethane elastomers and thermoplastic ethylene-vinyl acetate copolymers with both a physical or chemical blowing agent other than a supercritical fluid present in an amount up to about 15 wt % based on molten polymer weight and a supercritical fluid that is at least one of about 0.1 to about 5 weight percent of supercritical CO 2 based on molten polymer weight or about 0.1 to about 4 weight percent of supercritical N 2 based on molten polymer weight, to form a mixture and injecting the mixture into the mold and foaming the mixture to form the low density foamed article.

LOW DENSITY FOAM, MIDSOLE, FOOTWEAR, AND METHODS FOR MAKING LOW DENSITY FOAM

Foamed thermoplastic elastomeric polyurethane and ethylene-vinyl acetate copolymer articles are made with a combination of a supercritical fluid and a non-supercritical fluid blowing agent. 130-. (canceled)31. A method for making a low density foamed article , comprising:combining in an extruder a molten thermoplastic ethylene-vinyl acetate copolymer with(a) a chemical blowing agent and(b) a supercritical fluid,{'sub': 2', '2, 'to form a mixture, wherein the chemical blowing agent (a) is present in an amount up to about 15 wt % based on total polymer weight in the mixture and the supercritical fluid (b) comprises one of about 0.1 to about 5 weight percent of supercritical CObased on the total polymer weight in the mixture or about 0.1 to about 4 weight percent of supercritical Nbased on the total polymer weight in the mixture, and'}injecting the mixture into a mold at an injection pressure of from 110 MPa to about 207 MPa, and molding the mixture to form the low density foamed article, wherein the mold comprises a porous tool;{'sup': '3', 'wherein the low density foamed article has a density of less than 0.3 g/cm.'}32. The method according to claim 31 , wherein the molten thermoplastic ethylene-vinyl acetate copolymer comprises from about 25 weight percent to about 50 weight percent vinyl acetate content.33. The method according to claim 31 , wherein the molten thermoplastic ethylene-vinyl acetate copolymers having a melt index of from about 0.5 up to about 50 grams/10 min. (at 190° C. claim 31 , 8.7 kg) as measured using the procedure of ASTM D1238.341. The method according to claim claim 31 , wherein the chemical blowing agent is present in an amount from about 3 to about 12 wt % based on the total polymer weight in the mixture.351. The method according to claim claim 31 , wherein the supercritical fluid is one of from about 0.5 to about 3 weight percent of supercritical CObased on the total polymer weight in the mixture or from about 0.4 to about 2.5 weight ...

Polyolefin elastomer compositions and methods of making the same

An elastomeric article is provided that includes a composition having a silane-crosslinked polyolefin elastomer with a density less than 0.90 g/cm 3 . The elastomeric article can exhibit a compression set of from about 5.0% to about 35.0%, as measured according to ASTM D 395 (22 hrs @70° C.). The silane-crosslinked polyolefin elastomer can include a first polyolefin having a density less than 0.86 g/cm 3 , a second polyolefin having a crystallinity less than 40%, a silane crosslinker, a grafting initiator, and a condensation catalyst.

Degradable hemostatic sponge and preparation method and use thereof, and degradable drug-loaded hemostatic sponge

The present disclosure belongs to the technical field of hemostatic materials, and specifically relates to a degradable hemostatic sponge and a preparation method and use thereof, and a degradable drug-loaded hemostatic sponge. The degradable hemostatic sponge provided by the present disclosure is prepared from raw materials including a crosslinking-modified starch and a cellulose through freeze-drying, where a mass ratio of the crosslinking-modified starch to the cellulose is (0.2-5):1. The degradable hemostatic sponge provided by the present disclosure has a high water-absorbing rate and a large water-absorbing capacity, shows a high support strength and a long support time after water absorption, and is made from plant-derived raw materials and thus may be completely biodegraded. The degradable drug-loaded starch hemostatic sponge provided by the present disclosure has a drug-loaded coating attached to a surface of the sponge, where the drug is slowly released while a support is maintained.

MODIFIED EXPANDED BEAD AND FOAM MOLDED ARTICLE OF EXPANDED BEADS

A modified expanded bead that includes an expanded bead which includes a specific base polymer (β) and a coating layer which includes a specific base polymer (α). The coating layer covers at least part of an outer surface of the expanded bead. The melting point Tα of the base polymer (α) and the melting point Tβ of the base polymer (β) satisfy a relationship of 0≤Tα−Tβ≤20. When the modified expanded bead is cut into two halves along a cutting plane to form two half portions and thereafter one of the two half portions is cut along planes perpendicular to the cutting plane to form ten small pieces, outermost pieces among the ten small pieces have a xylene-insoluble content (B) which is less than a xylene-insoluble content (A) in the half portion and the xylene-insoluble content (A) is 10-80% by mass. 1. A modified expanded bead comprising an expanded bead and a coating layer which covers at least part of an outer surface of the expanded bead; wherein:the expanded bead comprises a base polymer (α) comprising an olefin-based thermoplastic elastomer;the coating layer comprises a base polymer (β) comprising one or more kinds of an olefin-based thermoplastic polymer selected from the group consisting of a polyolefin-based resin and an olefin-based thermoplastic elastomer;a relationship between a melting point Tα [° C.] of the base polymer (α) and a melting point Tβ [° C.] of the base polymer (β) satisfies 0≤Tα−Tβ≤20; andwhen the modified expanded bead is cut into two halves along a cutting plane to form two half portions, and thereafter one of the two half portions is cut along planes perpendicular to the cutting plane to form ten small pieces, each small piece having an equal thickness to one another, outermost pieces among the ten small pieces have a xylene-insoluble content (B) which is less than a xylene-insoluble content (A) included in another of the two half portions, and the xylene-insoluble content (A) is equal to or more than 10% by mass and equal to or less than ...

Openly porous acoustic foam, process for manufacture and uses thereof

There is provided a method of manufacturing an openly and highly porous thermoset foam, the method comprising the steps of mixing a thermosetting resin and crystals to form a mixture; applying pressure to the mixture to expel excess thermosetting resin, thereby producing a network of crystals touching each other with the thermosetting resin filling the interstices between the crystals of said network; curing the thermosetting resin in the mixture under pressure to produce a cured material; and contacting the cured material with a solvent for the crystals, thereby leaching the crystals out of the cured material, thereby obtaining said openly and highly porous thermoset foam. There is also provided a thermoset foam made of a thermoset and having a porosity of at least about 70%, wherein more than about 75% of the pores in the foam are connected to a neighboring pore.