Primer composition for improving the bonding of a urethane adhesive
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United States of America Patent
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Aug 11, 1998
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N/A
app pub date -
Dec 30, 1996
filing date -
Dec 30, 1996
priority date (Note) -
Expired
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Abstract
The invention is a primer composition, comprising (a) a polyester resin of a carboxylic acid and a glycol; (b) a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate or a mixture thereof; and (c) bismuth octoate in a volatile solvent. The primer composition of the invention advantageously provides improved adhesion characteristics of metal-to-glass bonding when used to prime substrate, particularly painted metal substrate before the application of a urethane adhesive. The primer composition of the invention may also be used to prime other metal and glass surfaces for use with various adhesives.
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