Patent ID: 7491785

Claim:
A siloxane-based polymer prepared by hydrolyzing and polycondensing the multi-functional cyclic silicate compound of formula (1) in combination with at least one monomer selected from the group consisting of the compounds of formulae (2)-(5), in an organic solvent in the presence of an acid or base catalyst and water: wherein, R 1 is a hydrogen atom, a C 1-3 alkyl group, R′CO (wherein, R′ is a C 1-3 alkyl group) or SiX 1 X 2 X 3 (wherein, each of X 1 , X 2 and X 3 is, independently, a halogen atom); and p is an integer from 3 to 8; wherein, R 1 is a hydrogen atom, a C 1-3 alkyl group or a C 6-15 aryl group; each of X 1 , X 2 and X 3 is, independently, a C 1-3 alkyl group, a C 1-10 alkoxy group or a halogen atom, provided that at least one of them is hydrolysable; m is an integer from 0 to 10; and p is an integer from 3 to 8; X 3 X 2 X 1 Si-M-SiX 1 X 2 X 3 (3) wherein, each of X 1 , X 2 and X 3 is, independently, a C 1-3 alkyl group, a C 1-10 alkoxy group or a halogen atom, provided that at least one of them is hydrolysable; and M is a C 1-10 alkylene group or a C 6-15 arylene group; wherein, R 1 is a hydrogen atom, a C 1-3 alkyl group or a C 6-15 aryl group; R 2 is a hydrogen atom, a C 1-3 alkyl group or a C 6-15 aryl group; R′CO (wherein, R′ is a C 1-3 alkyl group) or SiX 1 X 2 X 3 (wherein, each of X 1 , X 2 and X 3 is, independently, a hydrogen atom, a C 1-3 alkyl group, a C 1-10 alkoxy group or a halogen atom, provided that at least one of them is hydrolysable); and p is an integer from 3 to 8; and (R 1 ) n Si(OR 2 ) 4-n (5) wherein, R 1 is, independently, a hydrogen atom, a C 1-3 alkyl group, a C 6-15 aryl group or a halogen atom; R 2 is, independently, a hydrogen atom, a C 1-3 alkyl group or a C 6-15 aryl group; and n is an integer from 0 to 3, wherein the polymer has a Mw of 3,000-300,000.