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    Foamed fluoropolymer composites
    196.
    发明公开
    Foamed fluoropolymer composites 失效
    VerbundwerkstoffegeschäumterKunststoffe

    公开(公告)号：EP0809257A1

    公开(公告)日：1997-11-26

    申请号：EP97107890.2

    申请日：1997-05-14

    Applicant: E.I. DU PONT DE NEMOURS & COMPANY INCORPORATED

    Inventor： Venkataraman, Sundar Kilnagar ,  Randa, Stuart Karl ,  Spohn, Peter Dwight

    IPC: H01B3/44 ,  B29C44/34 ,  C08J9/12 ,  C08J9/28

    CPC classification number: C08J9/122 ,  B29C44/0461 ,  B29C44/3446 ,  B29C44/348 ,  C08J9/28 ,  C08J2201/05 ,  C08J2327/12 ,  H01B3/445

    Abstract: Fluoropolymer is advantageously foamed by first forming a composite structure of a layer of the fluoropolymer to be foamed and a layer of different material such as a different fluoropolymer not to be foamed, followed by heating the composite structure to the foamable state for the layer of fluoropolymer to be foamed, pressurizing the heated composite structure with supercritical carbon dioxide, rapidly depressurizing the heated composite structure, whereby the foamable layer foams and the other layer foams less or not at all, and cooling the foamed composite structure.

    Abstract translation: 氟聚合物有利地通过首先形成待发泡的含氟聚合物的层的复合结构和不同材料的层，例如不发泡的不同含氟聚合物，然后将复合结构加热到含氟聚合物层的发泡状态， 发泡，用超临界二氧化碳对加热的复合结构进行加压，快速减压加热的复合结构，由此可发泡层泡沫和另一层泡沫更少或根本不发泡，并且冷却发泡复合结构。

    Polyolefin foams having open and/or closed pores and consisting of polyolefins of ultrahigh molecular weight, process for their production, and their use
    198.
    发明公开
    Polyolefin foams having open and/or closed pores and consisting of polyolefins of ultrahigh molecular weight, process for their production, and their use 失效
    聚烯烃泡沫与它们的制备和应用的超高分子量，处理的聚烯烃的打开和/或封闭的孔。

    公开(公告)号：EP0301622A2

    公开(公告)日：1989-02-01

    申请号：EP88201416.0

    申请日：1988-07-07

    Applicant: DSM N.V.

    Inventor： Rutten, Hendrikus Johannes Jozef ,  Pluyter, Pieter Boudewijn

    IPC: C08J9/04 ,  C08J9/26 ,  C08J9/28 ,  C08L23/04

    CPC classification number: C08J9/26 ,  C08J9/06 ,  C08J9/141 ,  C08J9/28 ,  C08J2201/0482 ,  C08J2201/0484 ,  C08J2201/05 ,  C08J2201/0502 ,  C08J2323/04 ,  Y10T428/249988 ,  Y10T428/249989 ,  Y10T428/249992

    Abstract: The invention relates to polyolefin foams consisting of polyolefins of ultrahigh molecular weight, i.e. weight-average molecu­lar weight from about 4 x 10⁵ to 6 x 10⁶ g/mol and higher, and to a novel process for producing these foams by foaming a solution of a polyolefin of ultrahigh molecular weight in a solvent with the use of a physical or chemical blowing agent or of an inert gas blown into the solution, and cooling of the resulting foam to a temperature below the gelling tempereature of the polyolefin. If appropriate, these foams can be provided wholly or partially with a smooth skin on their sur­face by superficial cooling, if appropriate under the action of pressure. These foams are distinguished by high tensile strength and impact strength values, shock-absorbing properties, low glass tran­sition temperatures, low embrittlement at low temperatures and high chemical resistance, and they are used especially as mechanical and acoustic insulating materials, materials of construction, filter agents and implantation materials.

    Abstract translation: 本发明涉及一种聚烯烃泡沫由...组成的超高分子量，即聚烯烃的 重均分子量为约4×10 <5> 6×10 <6>克/摩尔或更高，并为通过在与溶剂发泡超高分子量的聚烯烃的溶液生产论文泡沫的新方法 使用物理或化学发泡剂吹入溶液中的惰性气体，并将所得泡沫的冷却或对聚烯烃的胶凝tempereature以下的温度。 如果合适，本文泡沫可以完全或部分地由浅冷却设置有光滑的皮肤在其表面上，如果适合的压力的作用下。 这些泡沫是由高拉伸强度和冲击强度值，吸震性，低玻璃化转变温度，在低温和高耐化学性低的脆化区分，并且它们被用来爱特别是作为机械和声学绝缘材料，结构材料，过滤器 剂和注入的材料。

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