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    • 108. 发明授权
    • Rubber powders
    • 橡胶粉
    • US4456734A
    • 1984-06-26
    • US337064
    • 1982-01-04
    • Christian LindnerKarl-Heinz Ott
    • Christian LindnerKarl-Heinz Ott
    • C08F2/18C08F285/00C08J3/12C08F265/06
    • C08F285/00
    • Free-flowing rubber powders of particles having an average diameter of from 0.01 to 10 mm which contain a grafted-on shell of the polymer or copolymer of one or more vinyl monomers in a quantity of from 2 to 20% by weight, based on the rubber, which rubber is a latex polymer of which the latex particles consist essentially of from 99 to 80% by weight of acrylate rubber having glass transition temperatures below 0.degree. C. and from 1 to 20% by weight of polymer having glass transition temperatures above 0.degree. C. grafted thereon, and a process for their production, wherein the latex of the rubber is completely broken to form an aqueous suspension of the rubber, after which from 2 to 20% by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transition temperatures above 25.degree. C. are introduced into the suspension and the monomer(s) is/are polymerized, optionally after the addition of a radical-forming catalyst.
    • 平均直径为0.01至10mm的颗粒的自由流动的橡胶粉末,其含有2-20重量%的2-20重量%的聚合物或共聚物的接枝壳,基于 橡胶,其是胶乳聚合物,其中胶乳颗粒基本上由99至80重量%的玻璃化转变温度低于0℃的丙烯酸酯橡胶和1至20重量%的具有玻璃化转变温度的聚合物组成 接枝在其上的0℃及其制备方法,其中橡胶的胶乳被完全破碎以形成橡胶的水性悬浮液,之后,基于橡胶的2至20重量%的橡胶为1或 将形成玻璃化转变温度高于25℃的聚合物的更多的乙烯基单体引入悬浮液中,任选地在加入自由基形成催化剂之后将单体聚合。