Amphiphilic organopolysiloxane dendrimers with high refractive index

摘要

Branched organopolysiloxanes of low molecular weight contain bonded arylalkyl groups. Si—C bonded surfactant groups, preferably polyoxyalkylene polyether groups, and long chain alkyl groups, exhibit a high refractive index, are completely or partially self-emulsifying, and are compatible with a variety of cosmetically acceptable oils and solvents.

主权项

1. A liquid or solid branched organopolysiloxane of the formula
MaTbQc where a is at least 3, b is 0-4, and c is 0-2; where M is a monovalent siloxy unit of the formula
ReR1fR2gR3hSiO(4−(e+f+g+h))/2 where e, f, g, and h are individually integers from 0 to 3 and the sum (e+f+g+h) equals 3; R is a lower alkyl group or an aryl group, R1 is an arylalkyl group R2 comprises an alkylene-bonded surfactant group selected from the group consisting of polyoxyalkylene polyethers, polyhydroxyl compounds, and saccharides, R3 is a long chain alkyl group having 840 C atoms; where T is a trivalent siloxy unit of the formula
Re′R1f′R2g′R3h′SiO(4−(e′+f′+g′+h′))/2 where the sum (e′+f+g′+h′) is 1; where Q units are of the formula SiO4/2, with the proviso that the refractive index of the organopolysiloxane or dendrimer is ≧1.45, and the organopolysiloxane or dendrimer is self-emulsifyable in water at 10% by weight relative to the total weight of water and organopolysiloxane or dendrimer, and the organopolysiloxane or dendrimer contains at least one of each of R1, R2, and R3.