Patent ID: 8026035

Claim:
A composition, comprising: a copolymer including a mixture of monomeric units having structures (A), (B), and (C), and one or more of structures (D) or (E): HSiO (3-a)/2 (OH) a (A) Si (3-b)/2 (OH) b —(CH 2 ) n —SiO (3-c)/2 (OH) c (B) R1SiO (3-d)/2 (OH) d (C) MeSiO (3-e)/2 (OH) e (D) R2SiO (3-f)/2 (OH) f (E) wherein: a, b, c, d, e, and f are independently from 0 to 2, n is from 0 to about 10, R1 is a chromophore, R2 is a hydrophilic group, the copolymer includes the monomeric unit having the structure (E), and R2 includes one or more of an aliphatic alcohol, a cycloaliphatic alcohol, an ether, or an ester.