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.
A method of improving the adhesion of a rubbery copolymer to a glass surface which 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 ethyleneglycolmonoethylether acetate, subsequently coating the primed glass surface with said copolymer and curing said coating.
Claim 2
Independent Claim
106 words
A method of improving the adhesion of a rubbery copolymer to a glass surface which 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 ethyleneglycolmonoethylether acetate, subsequently coating the primed glass surface with said copolymer and curing said coating.
Claim 3
Dependent Claim
33 words
A method as in claim 1 in which the rubbery copolymer contains from 25 to 75 parts by weight of styrene and from 75 to 25 parts by weight of butadiene or isoprene.
Claim 4
Dependent Claim
26 words
A method as in claim 1 in which the combination contains 95% by weight of said first primer and 5% by weight of said second primer.
Claim 5
Dependent Claim
26 words
A method as in claim 1 in which the combination contains 90% by weight of said first primer and 10% by weight of said second primer.
Claim 6
Dependent Claim
17 words
A method as in claim 1 in which the coating is cured for 30 minutes at 150°C.
Claim 7
Dependent Claim
16 words
A method as in claim 1 in which the cured coating is about 8 mils thick.