Patent ID: 7915369

Claim:
A process for preparing an organic-inorganic hybrid polymer UV protective material, comprising: a) providing one or more polyhedral silsesquioxanes [SiO1.5]n where n=6, 8, 10, or 12; b) functionalizing said polyhedral silsesquioxane with a plurality of —SiMe2R groups to form functional polyhedral silsesquioxane macromonomers wherein R includes R 1 group and R 2 group which are different from each other and reactive with each other; and c) reacting R 1 and R 2 groups of the functional polyhedral silsesquioxane macromonomer respectively with R 2 and R 1 groups of the adjacent functional polyhedral silsesquioxane macromonomer in order to bond the functional polyhedral silsesquioxane macromonomers and produce a cured organic-inorganic hybrid polymer, wherein said step of functionalizing takes place in the presence of as catalyst which accelerates the reaction of said polyhedral silsesquioxane with functionalizing reagents which supply R 1 and R 2 groups, and after reaching a target ratio of R 1 and R 2 groups, an amount of catalyst deactivator is added which only partially deactivates said catalyst such that the macromonomer(s) are storage stable and yet still crosslinkable.