A process for preparing a thermoplastic molding composition of the ABS type is described. The process includes: (A) forming at least one graft rubber A) using a rubber latex having a d
50
value of <200 nm; (B) forming at least one graft rubber B) using a rubber latex having a d50 value of ≧200 nm; and forming a rubber-free thermoplastic polymer resin C). The method further includes: (D) forming precipitates of graft rubbers A) and B); (E) de-watering the precipitates to form water moist powders of graft rubbers A) and B); and mixing the water-moist powders of graft rubbers A) and B) with polymer C) in a kneader reactor. Graft rubbers A) and B) may be prepared separately or in a single step. The content in wt. % of rubber originating from graft rubber component A) based on the total amount of rubber in the molding composition is at least 5 wt. % lower than the content of rubber in wt.% originating from graft rubber component B), in each case based on 100 parts by wt. of graft rubber.
描述了一种制备
ABS类型热塑性模塑组合物的过程。该过程包括:(A)使用具有d50值<200 nm的橡胶乳制备至少一种嫁接橡胶A);(B)使用具有d50值≥200 nm的橡胶乳制备至少一种嫁接橡胶B);并形成不含橡胶的热塑性聚合物树脂C)。该方法进一步包括:(D)形成嫁接橡胶A)和B)的沉淀物;(E)脱水沉淀物以形成嫁接橡胶A)和B)的水湿粉末;并将
水湿粉末的嫁接橡胶A)和B)与聚合物C)混合在一个炼胶反应器中。嫁接橡胶A)和B)可以分别或在单个步骤中制备。根据嫁接橡胶组分A)中来源于橡胶的重量百分比在模塑组合物中的总橡胶量基础上,重量百分比中来自嫁接橡胶组分A)的橡胶含量至少比来自嫁接橡胶组分B)的橡胶含量低5重量百分比,每种情况基于100重量份的嫁接橡胶。