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US 4,463,110 AGranted
Neoprene latex contact adhesives
AssigneeNational Starch and Chemical Corporation
InventorsWitold Perlinski, Irwin J. Davis, John F. Romanick
Life of this patent
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Abstract
The metal adhesion and heat and water resistance of conventional neoprene latex adhesives are improved by the addition thereto of a polyfunctional amine and an epoxy resin wherein for every 100 parts by weight of dry neoprene, the epoxy is added in an amount of 10-40 parts and the amine is added in an amount sufficient to provide 50-150% of the stoichiometric amount required to cure the epoxy.
Claims8
An improved multi-part aqueous contact adhesive composition containing not more than a minor amount of organic solvent consisting essentially of an unreacted blend of:
- (a) a neoprene latex,
- (b) a polyamine selected from the group consisting of isophorone diamines, tetraethylene pentamine, ethylene diamine, diethylene triamine, triethylene tetramaine, propylene diamine, butylene diamine and hexamethylene diamine,
- (c) an epoxy resin, and
- (d) a tackifier selected from the group consisting of phenolic resins and phenolic-modified terpene resins;
- wherein for every 100 parts by weight of dry neoprene, the epoxy resin is present in an amount of 10 to 40 parts, the polyamine in an amount sufficient to provide 50 to 150% of the stoichiometric amount required to cure the epoxy, and the tackifier in an amount of 20 to 50 parts.
2 more elements
Dependencies are inferred from the claim text.