Patent ID: 7129294
Filing Date: 2006-10-31
Classification: C08F,G01J

Abstract:
1. A vinyl polymer which has at least one terminal functional group per molecule and has a ratio of weight average molecular weight to number average molecular weight of less than 1.8 as determined by gel permeation chromatography and has a number average molecular weight 500–100,000, said terminal functional group being a crosslinking silyl group of the general formula (1) shown below, wherein R 1 and R 2 each independently represents an alkyl group containing 1 to 20 carbon atoms, an aryl group containing 6 to 20 carbon atoms, an aralkyl group containing 7 to 20 carbon atoms, or a triorganosiloxy group of the formula (R′) 3 SiO—, R′ being a monovalent hydrocarbon residue containing 1 to 20 carbon atoms and the three R′ groups being the same or different, provided that when a plurality of R 1 or R 2 groups occur, they may be the same or different; Y represents a hydroxyl group or a hydrolyzable group, provided that when a plurality of Y groups occur, they may be the same or different; a represents 0, 1, 2 or 3, b represents 0, 1 or 2, and m represents an integer of 0 to 19, provided that the condition a+mb≧1 should be satisfied, wherein the vinyl polymer having at least one terminal crosslinking silyl group is prepared by adding a hydrosilane compound having a crosslinking silyl group to a vinyl polymer having at least one alkenyl group which is prepared by adding a compound having at least two poorly polymerizable alkenyl groups to a reaction mixture when synthesizing a vinyl polymer by living radical polymerization, wherein the compound having at least two poorly polymerizable alkenyl groups is 1,5-hexadiene, 1,7-octadiene or 1,9-decadiene.