One of the purposes of the present invention is to provide a high-purity (meth) acrylic silicone graft copolymer which has a higher heat resistance and a smaller amount of monomers. Further, the other purpose of the present invention is to provide a cosmetic comprising the copolymer. The present invention provides a (meth) acrylic silicone graft (co)polymer having a unit represented by the following formula (I), a structure represented by the following formula (III) at one terminal, and a structure represented by the following formula (IV) at the other terminal,
wherein A is a group having a linear organopolysiloxane structure represented by the following formula (1) or a group having a dendritic organopolysiloxane structure represented by the following formula (2-1) or (2-2), X' is a group as defined for A,
wherein Z is a divalent organic group, Q is a group represented by the following formula (2), D is a (3c+1) -valent organopolysiloxanyl group which has a hierachial order of c, 3c means 3 raised to the power of c, c is an integer of from 1 to 8.
本发明的目的之一是提供一种高纯度(甲基)
丙烯酸硅酮接枝共聚物,它具有更高的耐热性和更少的单体量。此外,本发明的另一个目的是提供一种包含该共聚物的化妆品。本发明提供了一种(甲基)
丙烯酸硅酮接枝(共)聚合物,它具有下式(I)表示的单元,一端为下式(III)表示的结构,另一端为下式(IV)表示的结构、
其中 A 是具有下式(1)所代表的线型有机聚
硅氧烷结构的基团,或具有下式(2-1)或 (2-2)所代表的树枝状有机聚
硅氧烷结构的基团,X'是为 A 所定义的基团、
其中 Z 是二价有机基团,Q 是下式(2)所代表的基团,D 是(3c+1)价有机聚
硅氧烷基团,该基团的阶数为 c,3c 表示 3 升至 c 的幂,c 是 1 至 8 的整数。