Preparation of bead-form expandable styrene polymers having improved
expandability
    75.
    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。

    Preparation of expandable thermoplastic polymers by post-impregnation
    76.
    发明授权
    Preparation of expandable thermoplastic polymers by post-impregnation 失效
    通过后浸渍制备可发性热塑性聚合物

    公开(公告)号:US5561170A

    公开(公告)日:1996-10-01

    申请号:US426475

    申请日:1995-04-20

    IPC分类号: C08J9/18 C08J9/28

    CPC分类号: C08J9/18

    摘要: A process for the preparation of expandable thermoplastic polymers by post-impregnation with a blowing agent in aqueous suspension in the presence of a mixture of magnesium pyrophosphate and a sulfonate group-containing extender as suspension stabilizer, in a reactor comprisesa) preparing the magnesium pyrophosphate in the same reactor at below 50.degree. C. by adding a solid magnesium salt in an amount corresponding to an at least 3% stoichiometric excess, based on pyrophosphate, to an aqueous solution of the pyrophosphate,b) heating the suspension medium to from 70.degree. to 140.degree. C. andc) adding the blowing agent in this temperature range.

    摘要翻译: 在反应器中,在焦磷酸镁和含磺酸酯基的延长剂作为悬浮稳定剂的混合物的存在下,在含水悬浮液中用发泡剂后浸渍制备可发性热塑性聚合物的方法包括:a)制备焦磷酸镁 在相同的反应器中在低于50℃下,通过将相当于基于焦磷酸盐的至少3%化学计量过量的固体镁盐加入到焦磷酸盐水溶液中,b)将悬浮介质加热至70℃ ℃至140℃,c)在该温度范围内加入发泡剂。

    Heat distortion resistant, expandable styrene polymers having a high
capacity for expansion
    77.
    发明授权
    Heat distortion resistant, expandable styrene polymers having a high capacity for expansion 失效
    具有高膨胀能力的耐热变形性,可发性苯乙烯聚合物

    公开(公告)号:US5262445A

    公开(公告)日:1993-11-16

    申请号:US913374

    申请日:1992-07-15

    IPC分类号: C08J9/00 C08J9/20 C08J9/16

    摘要: Expandable styrene polymers containinga) from 80 to 99% by weight of polystyrene,b) from 1 to 20% by weight of a styrene-soluble polymer having a softening point above 140.degree. C.,c) from 3 to 10% by weight, based on the sum of a) and b), of a C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent, and, if desired, d) conventional additives,the mixture of components a) and b) having a melt flow index MFI 200/5 of from 15 to 30, have high heat distortion resistance and a high capacity for expansion.

    摘要翻译: 其包含a)80至99重量%的聚苯乙烯,b)1至20重量%的软化点高于140℃的苯乙烯可溶性聚合物,c)3至10重量% 基于a)和b)的总和,C3至C6烃作为发泡剂,如果需要,d)常规添加剂,具有熔体流动指数MFI 200的组分a)和b)的混合物 / 5为15〜30,耐热变形性高,扩容能力强。

    Preparation of expandable styrene polymers
    79.
    发明授权
    Preparation of expandable styrene polymers 失效
    可膨胀苯乙烯聚合物的制备

    公开(公告)号:US5100923A

    公开(公告)日:1992-03-31

    申请号:US606313

    申请日:1990-10-31

    CPC分类号: C08J9/20 C08J2325/00

    摘要: In the preparation of expandable styrene polymers by polymerizing styrene, if desired together with up to 50% by weight of other monomers, in aqueous suspension with addition of a C.sub.3 - to C.sub.6 -hydrocarbon as blowing agent and, if desired, conventional additives in effective amounts before, during or after the polymerization, foaming is reduced if the aqueous phase contains from 0.05 to 0.3% by weight of polyvinylpyrrolidone having a K value of from 100 to 150 as protective colloid.

    摘要翻译: 在可发性苯乙烯聚合物的制备中,如果需要,加上多达50重量%的其它单体,在水性悬浮液中加入C3-至C6-烃作为发泡剂,如果需要,常规添加剂有效 如果水相含有0.05-0.3重量%的K值为100-150的聚乙烯吡咯烷酮作为保护胶体,则在聚合之前,期间或之后的量,发泡减少。