阅读说明：本技术 三阶段聚合物颗粒 (Three stage polymer particles ) 是由 郭海兰 罗璞 M·威尔斯 于 2019-03-04 设计创作，主要内容包括：本发明提供聚合物颗粒,其包含(a)以所述聚合物颗粒的干重计,40重量％至85重量％的Tg为-35℃或更低的核聚合物；(b)以所述聚合物颗粒的干重计,15重量％至50重量％的Tg为20℃或更低并且比所述核聚合物的Tg高10℃或更多的中间体聚合物；(c)以所述聚合物颗粒的干重计,5重量％至30重量％的Tg为50℃或更高的壳聚合物；其中所述壳聚合物包含以所述壳聚合物的重量计的1重量％或更少的量的所有乙烯基芳香族单体的聚合单元。(The present invention provides polymer particles comprising (a) from 40 to 85 wt.%, based on the dry weight of the polymer particles, of a core polymer having a Tg of-35 ℃ or less; (b) 15 to 50 wt.%, based on dry weight of the polymer particles, of an intermediate polymer having a Tg of 20 ℃ or less and 10 ℃ or more above the Tg of the core polymer; (c) from 5 to 30 wt% of a shell polymer having a Tg of 50 ℃ or greater, based on dry weight of the polymer particles; wherein the shell polymer comprises polymerized units of all vinyl aromatic monomers in an amount of 1 wt% or less based on the weight of the shell polymer.)