Expandable styrene polymers of high heat resistance
    8.
    发明授权
    Expandable styrene polymers of high heat resistance 失效
    具有高耐热性的可发性苯乙烯聚合物

    公开(公告)号:US5563178A

    公开(公告)日:1996-10-08

    申请号:US447076

    申请日:1995-05-22

    摘要: An expandable styrene polymer comprisinga) from 0 to 90% by weight of a styrene polymer or styrene copolymer other than b) contains at least 50% by weight of copolymerized styrene,b) from 10 to 100% by weight of a styrene/methacrylamide copolymer comprising from 0.5 to 50% by weight of at least one copolymerized N-substituted methacrylamide of the formula I ##STR1## where R.sup.1 and R.sup.2 are identical or different and are hydrogen, C.sub.1 - to C.sub.15 -alkyl, C.sub.6 - to C.sub.16 -cycloalkyl or C.sub.6 - to C.sub.20 -aryl, it being possible, if R.sup.1 and R.sup.2 contain at least 2 carbon atoms, for at least 2 carbon atoms to be linked via hetero atoms, andc) from 1 to 15% by weight, based on the sum of a) and b), of an aliphatic C.sub.3 - to C.sub.9 -hydrocarbon and/or carbon dioxide as blowing agent.

    摘要翻译: 包含a)0至90重量%的除b)之外的苯乙烯聚合物或苯乙烯共聚物的可发性苯乙烯聚合物含有至少50重量%的共聚苯乙烯,b)10至100重量%的苯乙烯/甲基丙烯酰胺 共聚物,其包含0.5至50重量%的至少一种式I的共聚N-取代的甲基丙烯酰胺,其中R 1和R 2相同或不同,为氢,C 1至C 15 - 烷基,C 6至C 16 - 环烷基或C 6 -C 20芳基,如果R 1和R 2含有至少2个碳原子,则通过杂原子连接至少2个碳原子,c)1至15重量%,基于 作为发泡剂的脂族C 3 -C 9烃和/或二氧化碳的a)和b)的总和。