Abstract: An exceptional increase in adhesion between vinyl polymers and glass is obtained when the polymer is mixed with a primer plus an aminosilane containing more than one amino group and applied to a glass surface in combination as a single coating rather than separately. Excellent adhesive bonding results by this method even after exposure of the bonded surface to aqueous solutions containing 4% by weight of alkali for 30 minutes at 65.degree. C.

Abstract: The adhesion of rubbery copolymers such as styrene-butadiene and styrene-isoprene rubbers to glass is vastly improved by first applying to the glass surface a combination of two primers within specified ratios and separately applying the copolymer thereover. In addition, the alkali resistance of the resulting bond is excellent when exposed to the normal washing cycle for glassware so coated. The method comprises first applying a combination of from 90 to 95% by weight of a first primer consisting of a 50% by weight latex containing 55 mol percent styrene and 45 mol percent butadiene plus 2% by weight of N-aminoethyl-gamma-aminopropyltrimethoxysilane and from 10 to 5% by weight of a second primer consisting of 8.4 parts by weight of an epichlorohydrin-bisphenol A resin, 1.6 parts by weight of N-Aminoethyl-gamma-aminopropyltrimethoxysilane and 45 parts by weight each of ethyleneglycolmonomethylether and ethyleneglycolmonoethyl ether acetate.