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    Polyphenylene-oxide-organopolysiloxane block co-polymers
    4.
    发明授权
    Polyphenylene-oxide-organopolysiloxane block co-polymers 失效
    聚苯乙烯 - 氧化 - 有机硅氧烷嵌段共聚物

    公开(公告)号：US3696137A

    公开(公告)日：1972-10-03

    申请号：US3696137D

    申请日：1971-03-05

    申请人： GEN ELECTRIC

    发明人： CLARK ROBERT F ,  KRANTZ KARL W

    IPC分类号： C08G77/46 ,  C07F7/18

    CPC分类号： C08G77/46 ,  Y10S516/01

    摘要： Block copolymers having polyphenylene oxide segments and polydimethylsiloxane segments, with the units present in critical length ratios, are useful as surface tension depressants for dielectric fluids, particularly dielectric fluids of the askarel type.

    摘要翻译： 具有聚苯醚链段和聚二甲基硅氧烷链段的嵌段共聚物以临界长度比存在，可用作介电流体，特别是服饰类型的介电流体的表面张力抑制剂。

    Organopolysiloxane-polyphenylene oxide block copolymers & method of preparation
    8.
    发明授权
    Organopolysiloxane-polyphenylene oxide block copolymers & method of preparation 失效
    有机聚硅氧烷 - 聚苯乙烯氧化物嵌段共聚物及其制备方法

    公开(公告)号：US3668273A

    公开(公告)日：1972-06-06

    申请号：US3668273D

    申请日：1971-03-05

    申请人： GEN ELECTRIC

    发明人： KRANTZ KARL W

    IPC分类号： C08G77/42 ,  C08G47/10 ,  C08G23/16 ,  C08G43/02

    CPC分类号： C08G77/42 ,  Y10S525/905

    摘要： Novel block copolymers are provided having both polydiorganosiloxane segments and polyphenylene oxide segments. The block copolymers are selected from those having the formula:

    WHERE Q and L are chosen from the group consisting of: Option 1 - when Q is a single bond, L is a single bond forming a cyclic or infinite polymer; Option 2 - when Q is HO, then L is:

    WHERE R is one of a variety of organic substituents, R'' is a nonphenyl substituent; each R'''' is independently selected from the class consisting of hydrogen, lower alkyl radicals having from one to six carbon atoms, and aryl radicals; phi is the phenyl substituent; a, b, c, and e are representative of the chain length of the polydiorganosiloxane components; n, p, x, and y are representative of the length of of polyphenylene oxide components; and d, f, g and h are indicative of the number of recurring units in the block copolymer, and each a, b, c, e, n, p, x, y, d, f, g and h are independent of each other, for example, the value of a in a polysiloxane block of a particular polymer can be different from the value of a second a in the same polymer. The block copolymers are formed by reacting polyphenylene oxide segments with polydiorganosiloxane segments which are chain terminated with amine groups. Additional length can be obtained through further reaction of the remaining amine groups. The materials produced according to this invention are useful in the formation of oriented films and fibers and as plasticizers for polyphenylene oxide. The films can be wrapped or extruded onto wires to provide electrical insulation. The films are also heat shrinkable and can be used to package turkeys using a heat shrinkable bag made from the film.

    摘要翻译： 提供了具有聚二有机硅氧烷链段和聚苯醚段的新型嵌段共聚物。 嵌段共聚物选自具有下式的那些：