Expandable styrene polymers of high expandability
    5.
    发明授权
    Expandable styrene polymers of high expandability 失效
    具有高可膨胀性的可膨胀的苯乙烯聚合物

    公开(公告)号:US5118718A

    公开(公告)日:1992-06-02

    申请号:US795152

    申请日:1991-11-20

    CPC分类号: C08J9/16 C08J2325/04

    摘要: Expandable styrene polymers of high expandability comprisea) a styrene polymer having a viscosity, measured in toluene, of from 55 to 80 [ml/g] and a melt flow index MFI (190.degree. C., 3.8 kp) of from 7.5 to 30 [g/10 min],b) from 1 to 10% by weight, based on a), of a C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired,c) conventional assistants in effective amounts.

    摘要翻译: 具有高膨胀性的可发性苯乙烯聚合物包括a)具有55至80 [ml / g]的粘度,在甲苯中测得的粘度为7.5至30的熔体流动指数MFI(190℃,3.8kp)的苯乙烯聚合物 [g / 10分钟],b)基于a)1至10重量%的C3至C6烃作为发泡剂,以及如果需要,c)有效量的常规助剂。

    Preparation of bead-form expandable styrene polymers having improved
expandability
    7.
    发明授权
    Preparation of bead-form expandable styrene polymers having improved expandability 失效
    制备具有改善的膨胀性的珠粒可发性苯乙烯聚合物

    公开(公告)号:US5616624A

    公开(公告)日:1997-04-01

    申请号:US495594

    申请日:1995-08-02

    CPC分类号: C08J9/20 C08K5/09 C08J2325/04

    摘要: A process for the preparation of bead-form expandable styrene polymers by polymerizing styrene, if desired in the presence of further comonomers, in aqueous suspension in the presence of organic molecular colloids as suspension stabilizers and conventional styrene-soluble polymerization catalysts and with addition of a blowing agent and, if desired, conventional additives in effective amounts, wherein the aqueous suspension contains at least one olefinically unsaturated carboxylic acid or a water-soluble salt thereof in an amount, based on the organic phase, of from 0.002 to 0.3% by weight of carboxylate anions.

    摘要翻译: PCT No.PCT / EP94 / 00662 Sec。 371日期:1995年8月2日 102(e)日期1995年8月2日PCT 1994年3月5日PCT公布。 第WO94 / 21719号公报 日期1994年9月29日一种通过在有机分子胶体作为悬浮稳定剂和常规苯乙烯可溶性聚合催化​​剂存在下,在水悬浮液中,如果需要在其它共聚单体存在下聚合苯乙烯,制备珠粒形可发性苯乙烯聚合物的方法 并且如果需要,加入有效量的常规添加剂,其中水悬浮液含有至少一种基于有机相的烯属不饱和羧酸或其水溶性盐为0.002 到0.3重量%的羧酸根阴离子。