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US 4,544,686 AGranted
Coating compositions
AssigneeImperial Chemical Industries PLC
InventorsCharles W. Bromley, Brian A. Cooke, Norman A. Coombes
Life of this patent
Estimating the term…
Abstract
A washcoat composition suitable for application to tin-plated mild steel consists of an aqueous carrier medium and a binder comprising specified relative proportions of (A) a thermosetting acrylic polymer in the form of a sterically stabilized dispersion in the aqueous medium and (B) an epoxy resin, the composition additionally containing an acid catalyst, in particular phosphoric acid or chromic acid or an ammonium or amine salt thereof.
Claims14
A washcoat composition suitable for application to tin-plated mild steel, consisting of an aqueous carrier medium and a binder comprising
- (A) from 70% to 98% by weight of a thermosetting acrylic polymer which is present as a sterically stabilised dispersion in the said aqueous medium, and
- (B) from 2% to 30% by weight of an epoxy resin;
- and which additionally contains from 0.1% to 10% by weight, based on the total binder, of an acid catalyst.
Dependencies are inferred from the claim text.