Patent ID: 7019099

Claim:
A siloxane-based resin prepared by hydrolyzing and polycondensing a cyclic siloxane compound of formula (1), together with a silane compound of formula (3) or by hydrolyzing and polycondensing the cyclic siloxane compound of formula (1) together with the silane compound of formula (3) and a silane compound of formula (4), in an organic solvent in the presence of a catalyst and water: wherein, R is H, C 1-3 alkyl, C 3-10 cycloalkyl, or C 6-15 aryl; each of X 1 , X 2 , and X 3 is, independently, C 1-3 alkyl, C 1-10 alkoxy, or halogen, provided that at least one is alkoxy or halogen; p is an integer from 3 to 8; and m is an integer from 1 to 10; SiX 1 X 2 X 3 X 4 (3) wherein, each of X 1 , X 2 , X 3 , and X 4 is, independently, C 1-10 alkoxy, or halogen; RSiX 1 X 2 X 3 (4) wherein, R is H, C 1-3 alkyl, C 3-10 cycloalkyl, or C 6-15 aryl; each of X 1 , X 2 , and X 3 is, independently, C 1-3 alkyl, C 1-10 alkoxy, or halogen, provided that at least one is alkoxy or halogen, and wherein the resin has a molecular weight of 3,000 to 500,000.