Patent ID: 7074853

Claim:
A compound of the formula wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 each, independently of the others, is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, R 11 and R 12 each, independently of the others, is an alkylene group, an arylene group, an arylalkylene group, or an alkylarylene group, A is an anionic moiety, n is an integer representing the number of repeat â€”OSi(R 7 )(R 8 )â€” monomer units, a is an integer representing the number of repeat â€”OSi(R 10 )(R 12 -lightfastness moiety)- monomer units, c is an integer representing the number of repeat â€”OSi(R 9 )(R 11 -hydrophilic moiety)- monomer units, the lightfastness moiety is a 2-(3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl) quaternary compound, and the hydrophilic moiety is a polyoxyalkylene chain.