Nanocomposite and molecular-composite polymer foams and method for their production
    163.
    发明授权
    Nanocomposite and molecular-composite polymer foams and method for their production 有权
    纳米复合材料和分子复合材料聚合物泡沫及其制备方法

    公开(公告)号:US07160929B1

    公开(公告)日:2007-01-09

    申请号:US10075528

    申请日:2002-02-13

    Applicant: Seng Tan

    Inventor: Seng Tan

    CPC classification number: B29C44/12 C08J9/0071 C08J9/0085 C08J2201/032

    Abstract: U.S. Pat. No. 6,232,354 issued May 15, 2001 describes an environmentally friendly and commercially practicable process for the production of microcellular polymer foams from amorphous, semi-crystalline and crystalline polymers which involves consolidating the polymer, saturating the polymer with an inert gas at elevated temperature and under elevated pressure, and controllably cooling, i.e. quenching the saturated polymer under a variety of temperature and pressure conditions to produce either a closed or open celled microcellular foam or a high density microcellular foam. It has now been discovered that a process similar to that described in this patent can be used for the production of nanocomposite and molecular-composite foams that exhibit exceptional physical properties.

    Abstract translation: 美国专利 2001年5月15日授权的No.6,232,354描述了一种环境友好且商业上可行的方法,用于从无定形,半结晶和结晶聚合物生产微孔聚合物泡沫,其涉及固化聚合物,在高温和低温下用惰性气体饱和聚合物 升高的压力和可控制的冷却,即在各种温度和压力条件下淬灭饱和聚合物以产生封闭的或开孔的微孔泡沫或高密度微孔泡沫。 现在已经发现,与该专利中描述的方法类似的方法可以用于生产显示出特殊物理性质的纳米复合材料和分子复合泡沫体。

    Fluoropolymer-carbon dioxide compositions and methods of processing fluoropolymers
    165.
    发明授权
    Fluoropolymer-carbon dioxide compositions and methods of processing fluoropolymers 失效
    含氟聚合物 - 二氧化碳组合物和加工含氟聚合物的方法

    公开(公告)号:US06960633B2

    公开(公告)日:2005-11-01

    申请号:US10268931

    申请日:2002-10-11

    Inventor: Younosuke Ohsaka

    Abstract: Fluoropolymer materials containing tetrafluoroethylene monomers, such as PTFE, are significantly swollen by supercritical carbon dioxide at high temperatures and pressures. The swollen fluoropolymer is processable by molding, extrusion, and other techniques. In addition, the fluoropolymer may be sintered at significantly lower temperatures compared to a nonswollen fluoropolymer material. The melting temperature of fluorinated polymers containing tetrafluoroethylene and triflouroethylene monomers which are swollen with supercritical carbon dioxide is significantly reduced, thereby permitting manufacturing operations such as extruding and molding to be performed at lower temperatures and with reduced risk of decomposition.

    Abstract translation: 含有四氟乙烯单体(如PTFE)的含氟聚合物材料在高温和高压下被超临界二氧化碳显着溶胀。 溶胀的含氟聚合物可通过模塑,挤出和其它技术加工。 此外,与非溶胀的含氟聚合物材料相比,含氟聚合物可以在显着更低的温度下烧结。 包含用超临界二氧化碳溶胀的四氟乙烯和三氟乙烯单体的氟化聚合物的熔融温度显着降低,从而允许诸如挤出和成型的制造操作在较低温度下进行并降低分解的风险。

    Process for producing foamed resin article

    公开(公告)号:US06596783B2

    公开(公告)日:2003-07-22

    申请号:US10094801

    申请日:2002-03-12

    CPC classification number: C08J9/12 B29C44/348 C08J2201/032 C08J2323/12

    Abstract: The present invention provides a process for producing a foamed resin article, the process comprising: a step (the first step) of impregnating any one crystalline thermoplastic resin or resin composition containing, as an elementary ingredient, a crystalline thermoplastic resin selected from a certain group, under an elevated pressure which is not lower than the critical pressure of a substance with which the selected crystalline thermoplastic resin or resin composition is to be impregnated, with a fluid of the substance, and a step (the second step) of releasing the resin or resin composition impregnated with the substance from the foregoing pressurized condition in a period of less than 10 seconds.

    Method for producing crystalline methacrylic resin and plastic foam
    170.
    发明授权
    Method for producing crystalline methacrylic resin and plastic foam 失效
    生产结晶甲基丙烯酸树脂和塑料泡沫的方法

    公开(公告)号:US06444719B1

    公开(公告)日:2002-09-03

    申请号:US09529012

    申请日:2000-04-06

    CPC classification number: C08J9/122 C08J5/00 C08J9/12 C08J2201/032 C08J2333/12

    Abstract: Provided are a method for producing a crystalline methacrylic resin, the method comprising a step of bringing a mixture of an isotactic methyl methacrylate-type polymer and a syndiotactic methyl methacrylate-type polymer into contact with high pressure gas and a method for producing a plastic foam of the crystalline methacrylic resin, the method comprising a step of foaming the mixture. According to the method of the present invention, a crystalline methacrylic resin which is not limited in a form applicable to molded articles thereof and has high crystallinity and excellent solvent resistance can be obtained in a simple method and a plastic foam of the crystalline methacrylic resin can be obtained, the plastic foam embracing fine cells having an average cell diameter of about 10 &mgr;m or less and a cell number density of 109 to 1015 cells/cm3. Such a plastic foam is superior in the solvent resistance and in the mechanical properties such as impact resistance and bending strength.

    Abstract translation: 提供一种生产结晶甲基丙烯酸树脂的方法,该方法包括使全同立构甲基丙烯酸甲酯类聚合物和间同立构甲基丙烯酸甲酯类聚合物的混合物与高压气体接触的步骤和制造塑料泡沫的方法 的结晶甲基丙烯酸树脂,该方法包括使混合物发泡的步骤。 根据本发明的方法,可以简单的方法得到结晶性甲基丙烯酸系树脂,其结晶性甲基丙烯酸系树脂的塑料泡沫体可以通过简单的方法得到结晶性甲基丙烯酸系树脂,该结晶性甲基丙烯酸系树脂不限于其成形品,结晶性高,耐溶剂性优异 可以获得具有平均泡孔直径约10μm或更小并且孔数密度为109至1015个/ cm 3的细胞的塑料泡沫。 这种塑料泡沫体的耐溶剂性和耐冲击性和弯曲强度等机械性能优异。

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