Patent ID: 7033391
Filing Date: 2006-04-25
Classification: C08G,C08K,C08L,G02B

Abstract:
1. Prepolymers comprising: wherein the V groups are the same or different reactive or polymenzable groups; the R 1 groups are either absent or, where present, the same or different spacer groups; the R 2 groups are the same or different C 1-6 alkyl groups; R 3 is either R 2 or R 4 ; R 4 is a C 6-30 aromatic group; R 5 is R 2 , R 4 or R 6 ; R 6 is a functional group that absorbs blue light; U is absent or, when present, a difunctional linkage; and m, n, p and q represent the same or different non-negative integers greater than zero.