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    Low density fluoropolymer foam
    271.
    发明授权
    Low density fluoropolymer foam 有权

    公开(公告)号：US11643520B2

    公开(公告)日：2023-05-09

    申请号：US16645131

    申请日：2018-09-05

    Applicant: Arkema Inc.

    Inventor： Saeid Zerafati ,  Ronald H. Partridge

    IPC: C08J9/32 ,  B29C48/40 ,  B29K105/16

    CPC classification number: C08J9/32 ,  B29C48/40 ,  B29K2105/165 ,  C08J2201/024 ,  C08J2201/03 ,  C08J2203/22 ,  C08J2207/06 ,  C08J2327/16 ,  C08J2433/08

    Abstract: The invention relates to low density fluoropolymer foam, and preferably polyvinylidene fluoride (PVDF) foam, such as that made with KYNAR PVDF resins, and articles made of the foam. The foam is produced by adding microspheres containing blowing agents to the polymer and processing it through an extruder. The microspheres consist of a hard shell containing a physical blowing agent. The shell softens at elevated temperatures and allows the expansion of the blowing agent, and microsphere to create larger voids within the polymer matrix. By proper control of the polymer composition, viscosity, processing temperature, blowing agent selection, loading ratio, and finishing conditions, useful articles such as foamed PVDF pipe, tube, profiles, film, wire jacketing and other articles can be produced. The microspheres may be added to the fluoropolymer matrix by several means, including as part of a masterbatch with a compatible polymer carrier.

    NANOCELLULAR FOAM WITH SOLID FLAME RETARDANT
    280.
    发明申请
    NANOCELLULAR FOAM WITH SOLID FLAME RETARDANT 有权
    具有固体阻燃剂的纳米泡沫

    公开(公告)号：US20170002162A1

    公开(公告)日：2017-01-05

    申请号：US15109935

    申请日：2015-03-18

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Liang Chen ,  Anne M. Kelly-Rowley ,  Shana P. Bunker ,  Stéphane Costeux

    IPC: C08J9/00 ,  C08J9/12

    CPC classification number: C08J9/0038 ,  C08J3/215 ,  C08J3/226 ,  C08J9/0004 ,  C08J9/0061 ,  C08J9/122 ,  C08J2201/024 ,  C08J2201/032 ,  C08J2203/06 ,  C08J2203/08 ,  C08J2205/042 ,  C08J2205/044 ,  C08J2333/12 ,  C08J2433/12

    Abstract: Prepare nanofoam by (a) providing an aqueous solution of a flame retardant dissolved in an aqueous solvent, wherein the flame retardant is a solid at 23° C. and 101 kiloPascals pressure when in neat form; (b) providing a fluid polymer composition selected from a solution of polymer dissolved in a water-miscible solvent or a latex of polymer particles in a continuous aqueous phase; (c) mixing the aqueous solution of flame retardant with the fluid polymer composition to form a mixture; (d) removing water and, if present, solvent from the mixture to produce a polymeric composition having less than 74 weight-percent flame retardant based on total polymeric composition weight; (e) compound the polymeric composition with a matrix polymer to form a matrix polymer composition; and (f) foam the matrix polymer composition into nanofoam having a porosity of at least 60 percent.

    Abstract translation: 通过（a）提供溶解在水性溶剂中的阻燃剂的水溶液来制备纳米纤维，其中阻燃剂在23℃为固体，并且在整齐的形式下为101千帕斯卡压力; （b）提供流体聚合物组合物，其选自溶解在水混溶性溶剂中的聚合物溶液或在连续水相中的聚合物颗粒的胶乳; （c）将阻燃剂的水溶液与流体聚合物组合物混合以形成混合物; （d）从混合物中除去水和溶剂（如果存在），以产生基于总聚合物组合物重量具有小于74重量％阻燃剂的聚合物组合物; （e）将聚合物组合物与基质聚合物复合以形成基质聚合物组合物; 和（f）将基质聚合物组合物发泡成具有至少60％的孔隙率的纳米电
    雾。

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