Patent ID: 8648125

Claim:
A stable silsesquioxane resin composition comprising (I) a silsesquioxane resin comprising: (a) the unit (RSiO (3-x)/2 (OR′) x ) m where R is a reactive organic group selected from groups containing acryloxy functionality such as methacryloxypropyl group, acryloxypropyl group, or styrenic functionality, R′ is hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms; and (b) optionally one or any combination of the following units (R 1 SiO (3-x)/2 (OR′) x ) n (R 1 SiO (3-x)/2 (OR′) x ) o (Ph(CH 2 ) s SiO (3-x)/2 (OR′) x ) p (R 3 R 4 SiO) q (SiO (4-x)/2 (OR′) x ) r where R 1 is an aliphatic group, e.g. methyl, ethyl, vinyl, with 1-4 carbons; R 2 is a hydrophilic group; R 3 and R 4 are groups are independently selected from methyl or phenyl, R′ is hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms, Ph represents a phenyl group; s has a value of 0, 1, 2, 3, or 4; x has a value of 0, 1 or 2; and in the resin m has a value of 0.025 to 1; n has a value of 0 to 0.95; o has a value of 0.0 to 0.20; p has a value of 0.0 to 0.75; q has a value of 0 to 0.75; and m+n+o+p+q+r=1 and (II) a hydrophilic inhibitor comprising strong hydrogen bonding groups, wherein the hydrophilic inhibitor is selected from L-ascorbic acid, D-ascorbic acid, maleic anhydride and salicylic acid (III) polar organic solvent, and (IV) optionally a thermal free radical initiator or a photo free radical initiator.