Patent ID: 6451439
Filing Date: 2002-09-17
Classification: C08L,C09D,C09J,Y10T

Abstract:
A primer composition used for effecting adhesion for a sealing composition to a substrate which comprises a solvent and, as component (A), a saturated hydrocarbon polymer having at least one silicon-containing group which has a hydroxyl group or hydrolysable group bound to the silicon atom and is capable of crosslinking under formation of a siloxane bond and, as component (B), a silane coupling agent, wherein said solvent is used in an amount of 100 to 10,000 weight parts per 100 weight parts of said saturated hydrocarbon polymer, and said polymer contains isobutylene-derived repeating units in a total amount of not less than 50 weight %, and wherein said silicon-containing group is represented by the general formula (1) wherein R1 and R2 each is independently 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 (Râ€²)3Si0â€”, wherein each Râ€² independently represents a substituted or unsubstituted hydrocarbon group containing 1 a to 20 percent carbon atoms, each X independently represents a hydroxyl group or a hydrolyzable group, a is 0, 1, 2 or 3, b is 0, 1 or 2 to the exclusion of the case where a and b are simultaneously 0 (zero), and m is 0 (zero) or an integer of 1 to 19.