COPOLYMER HAVING CARBOSILOXANE DENDRIMER STRUCTURE AND COMPOSITION AND COSMETIC CONTAINING THE SAME

摘要

A copolymer in which from 45 to 60% by mass of all monomer units are unsaturated monomers having a specific carbosiloxane dendrimer structure is disclosed, along with a composition, a cosmetic raw material, and a cosmetic containing the copolymer. The copolymer has excellent physical properties, including compatibility with other cosmetic raw materials, e.g. hardly soluble ultraviolet absorbers, and is capable of improving the compounding stability of cosmetics. The copolymer imparts cosmetics with good water resistance, sebum resistance, luster, tactile sensation, and adhesiveness to the hair or skin.

主权项

1. A copolymer in which from 45 to 60% by mass of all monomer units are unsaturated monomers having a carbosiloxane dendrimer structure represented by the following formula (1): wherein, Z is a divalent organic group; p is 0 or 1; R1 and R2 each independently represent a group selected from the group consisting of alkyl groups, aryl groups, and aralkyl groups, having 1 to 10 carbon atoms; and L1 is a silylalkyl group, in the case of i=1, represented by the following formula (2): wherein, Z and p are the same as defined above; R1 and R2 are the same as defined above; i is an integer ranging from 1 to 10 indicating a total number of generations of the silylalkyl group; Li+1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, an aralkyl group, and the silylalkyl group, Li+1 being a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group, or an aralkyl group when i=c (where c is an integer from 1 to 10 representing hierarchies of the silylalkyl group) and being the silylalkyl group when i