| abstract |
PURPOSE: To obtain a coating composition having excellent adhesion to substrate while retaining the inherent characteristics of a vinylidene fluoride polymer by mixing the vinylidene fluoride polymer with an acrylic polymer having an -NCO group and a hydrolyzable silyl group in the side chain. n CONSTITUTION: This coating composition is prepared by mixing a vinylidene fluoride polymer (A) (e.g., vinylidene fluoride homo- or co-polymer, e.g., 'Kynar 9301(R), a product of Pennwalt or vinylidene fluoride/tetrafluoroethylene/ hexafluoropropylene terpolymer) with an acrylic polymer (B) having an isocyanate group and a hydrolyzable silyl group in the side chain, e.g., n-butyl acrylate/methyl metacrylate/isocyanatoethyl methacrylate/γ- methacryloxypropyltrimethoxysilane (10/55/20/15 by weight) quaternary polymer in an A to B weight ratio of 40/60-95, desirably. 60/40-80/20, and dissolving 100 pts.wt. this mixture in 100-300 pts.wt. solvent. n COPYRIGHT: (C)1990,JPO&Japio |