Branched fluoropolymers
    83.
    发明授权
    Branched fluoropolymers 有权
    分支含氟聚合物

    公开(公告)号:US08557938B2

    公开(公告)日:2013-10-15

    申请号:US11271057

    申请日:2005-11-10

    IPC分类号: C08F4/38

    摘要: The invention relates to the preparation of branched fluoropolymers having long chain branches and little or no gels, by a process involving polymerization at high temperatures using persulfates and optionally multifunctional initiators. The invention also relates to gel-free, branched polymers with strain hardening produced by the process.

    摘要翻译: 本发明涉及通过使用过硫酸盐和任选的多官能引发剂在高温下聚合的方法制备具有长支链和很少或不含凝胶的支链含氟聚合物。 本发明还涉及通过该方法产生的具有应变硬化性的无凝胶的支化聚合物。

    Methods of (co)polymerizing vinyl and/or diene monomers and curing or
crosslinking polymeric resins using a heteropoly acid peroxide promoter
    89.
    发明授权
    Methods of (co)polymerizing vinyl and/or diene monomers and curing or crosslinking polymeric resins using a heteropoly acid peroxide promoter 失效
    (共)聚合乙烯基和/或二烯单体并使用杂多酸过氧化物促进剂固化或交联聚合物树脂的方法

    公开(公告)号:US6100356A

    公开(公告)日:2000-08-08

    申请号:US334410

    申请日:1999-06-16

    CPC分类号: C08F4/32

    摘要: A method of (co)polymerizing vinyl and/or diene monomers comprising contacting the monomers with a (co)polymeriztion composition under conditions effective to (co)polymerize the monomers, wherein the (co)polymerization composition comprises: (a) an organic peroxide component, and (b) a heteropoly acid, in an amount effective to lower the onset temperature of decomposition of the organic peroxide component with the proviso that if the heteropoly acid is phosphomolybdic acid the organic peroxide is not a peroxydicarbonate.

    摘要翻译: (共)聚合乙烯基和/或二烯单体的方法,包括在有效共聚单体的条件下使单体与(共)聚合组合物接触,其中(共)聚合组合物包含:(a)有机过氧化物 组分和(b)杂多酸,其量有效降低有机过氧化物组分的分解起始温度,条件是如果杂多酸是磷钼酸,则有机过氧化物不是过氧化二碳酸酯。

    Polymerization of vinyl chloride with t-butyl peroxyneoheptanoate and
perester peroxide
    90.
    发明授权
    Polymerization of vinyl chloride with t-butyl peroxyneoheptanoate and perester peroxide 失效
    氯乙烯与过氧化牛油酸叔丁酯和过氧化物过氧化物的聚合

    公开(公告)号:US5908905A

    公开(公告)日:1999-06-01

    申请号:US754167

    申请日:1996-11-22

    CPC分类号: C08F14/06

    摘要: There is provided a process of producing a vinyl chloride polymer wherein vinyl chloride monomer or a monomeric mixture containing vinyl chloride monomer is suspension polymerized in the presence of an oil-soluble polymerization initiator and a suspending agent in an aqueous medium in a polymerization vessel, said process comprising providing, as the oil-soluble polymerization initiator, a mixture of (A) t-butyl peroxyneoheptanoate with (B) a perester peroxide other than said t-butyl peroxyneoheptanoate, said perester peroxide being such that a 10-hour half-life period temperature of a benzene solution of said peroxide dissolved in an amount of 0.1 mole per 1 liter of benzene is 44 to 55.degree. C.; and completing the polymerization at a temperature higher than a preset temperature for the polymerization by from 10 to 20.degree. C. when or after the internal pressure of the polymerization vessel begin to drop at the terminal stage of the polymerization reaction. According to this process, it is possible to obtain a vinyl chloride polymer good in quality, particularly with low initial discoloration when processed into formed products, at a good yield in a short period of polymerization time.

    摘要翻译: 提供了一种生产氯乙烯聚合物的方法,其中氯乙烯单体或含有氯乙烯单体的单体混合物在油溶性聚合引发剂和悬浮剂存在下在聚合容器中的水性介质中悬浮聚合,所述 方法包括提供(A)过氧化牛油酸叔丁酯与(B)除过氧化牛油酸叔丁酯之外的过氧化物过氧化物的混合物作为油溶性聚合引发剂,所述过氧化物过氧化物使得10小时半衰期 所述过氧化物溶解的苯溶液的温度为每1升苯0.1摩尔的44至55℃。 并且当聚合反应的最后阶段聚合容器的内部压力开始下降时,在高于设定温度的温度下聚合反应10〜20℃。 根据该方法,可以在短时间的聚合时间内以良好的产率获得质量好的氯乙烯聚合物,特别是在加工成成形物时具有低的初始变色。