Coating composition for metal containers
AssigneeThe Dexter Corporation
InventorHarold F. Cole
Life of this patent
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Abstract
A coating composition for metal containers, a method of coating a metal container, and a metal article useful as a food or beverage container are disclosed. The coating composition for metal container interiors and exteriors comprises: (a) a low molecular weight polyfunctional epoxy resin; (b) a phenolic resin; (c) a solution grade vinyl chloride copolymer, a high molecular weight epoxy resin or a mixture thereof; (d) about 60% to about 90% by weight of nonvolatile material of a vinyl chloride dispersion resin; and a nonaqueous carrier. The coating composition is stored as a single unit system from manufacture until use without an unacceptable increase in viscosity.
Claims24
A coating composition for a metal substrate comprising:
- (a) about 2% to about 25% by weight of nonvolatile material of a low molecular weight polyfunctional epoxy novolac resin, said low molecular weight epoxy resin having a weight average molecular weight of about 200 to about 10,000;
- (b) about 2% to about 25% by weight of nonvolatile material of a phenolic resin;
- (c) about 2% to about 25% by weight of nonvolatile material of a solution grade vinyl chloride copolymer;
- (d) about 60% to about 90% by weight of nonvolatile material of a vinyl chloride dispersion resin;
- and
- (e) a sufficient amount of a nonaqueous carrier such that the coating composition includes about 20% to about 70% by weight of the composition of the total weight of (a), (b), (c) and (d),
- wherein the coating composition is free of a plasticizer.
A coating composition for a metal substrate comprising:
- (a) about 2% to about 25% by weight of nonvolatile material of a low molecular weight polyfunctional epoxy novolac resin, said low molecular weight epoxy resin having a weight average molecular weight of about 200 to about 10,000;
- (b) about 2% to about 25% by weight of nonvolatile material of a phenolic resin;
- (c) about 2% to about 25% by weight of nonvolatile material of a high molecular weight epoxy resin, said high molecular weight epoxy resin having a weight average molecular weight of about 10,000 to about 70,000;
- (d) about 60% to about 90% by weight of nonvolatile material of a vinyl chloride dispersion resin;
- and
- (e) a sufficient amount of a nonaqueous carrier such that the coating composition includes about 20% to about 70% by weight of the composition of the total weight of (a), (b), (c) and (c);
- wherein the coating composition is free of a plasticizer.
Dependencies are inferred from the claim text.