Patent ID: 7575655
Filing Date: 2009-08-18
Classification: C08G,C08L,C09D

Abstract:
1. A primer composition comprising: (A) 100 parts by weight of a partial hydrolysis product of at least one tetraalkoxysilane, or a mixture of said partial hydrolysis product and at least one tetraalkoxysilane; (B) 25-400 parts by weight, based on 100 parts by weight of component (A), of a component selected from the group consisting of metal salts, metal alkoxides, metal chelates, partial hydrolysis products thereof, and mixtures thereof; (C) 25-125 parts by weight, based on 100 parts by weight of component (A), of at least one silicone resin; and (D) at least one solvent selected from the group consisting of organic solvents, low molecular weight cyclic and linear polyorganosilicone compounds and mixtures thereof, with the proviso that the proportion of the solvent, based on the total composition, is 50-95% by weight, wherein the partial hydrolysis product of at least one tetralkoxysilane of constituent (A) comprises: 0-45 mol % of Q0 units, 30-80 mol % of Q1 units, 5-50 mol % of Q2 units, and 0-15 mol % of Q3 units.