Patent ID: 8440774

Claim:
A transparent silicone epoxy composition, consisting of: (a) at least an epoxy modified siloxane of formula (1): wherein n is larger than or equal to two, m/n is about 1˜12, R 1 is non-substituted C 1 ˜C 3 alkyl, R 2 is non-substituted C 1 ˜C 3 alkyl or phenyl, R 3 is non-substituted C 1 ˜C 3 alkyl or epoxide, each molecule of epoxy modified siloxane at least comprises two cycloaliphatic epoxide groups, the number average molecular weight of epoxy modified siloxane is about 1000˜15000, the weight percentage of epoxy modified siloxane in the transparent silicone epoxy composition is about 10˜89 wt %; (b) at least a silanol-containing siloxane of formula (2): wherein 5≦x≦40, 0≦y≦5, R 4 is non-substituted C 1 ˜C 3 alkyl, R 5 is phenyl, the number average molecular weight of silanol-containing siloxane is about 500˜4000, silanol-containing siloxane comprises at least two hydroxyl groups and the weight percentage of silanol-containing siloxane in the transparent silicone epoxy composition is about 89˜10 wt %; and (c) a catalyst, wherein the weight percentage of the catalyst in the transparent silicone epoxy composition is about 0.01˜1 wt % and the catalyst is selected from the group consisting of aluminum acetylacetonate, aluminum tris(propylacetonate), quaternary phosphonium bromide promoter or quaternary ammonium salt promoter.