National Research Development Corporation

British Technology Group Limited

John W Nicholson

Alan D Wilson

John Ellis

Helen Mary Anstice

Eleanor A Wasson

Command-curable composition

A metallic container for beverage is protected from its contents by electrodeposited zinc, which is anodized in alkali then anodically reacted with weak poly(acrylic acid) and finally cured at 85.degree. C. at 100% relative humidity.

Coating substrates

An aluminium or tinned-steel can for carbonated beverage is protected by a low-temperature curing lacquer. The lacquer is applied as an aqueous coating formulation of ethylene maleic acid copolymer (containing KOH to promote decarboxylation) plus some poly(acrylic acid) to promote coherent-film-forming ability plus a diol cross-linking agent to reduce the water-sensitivity. The coated substrate is heat-cured at the relatively low temperature of 200.degree. C. for 10 minutes.

Coating process

A process for the preparation of a coherent protective layer on a substrate surface of a body, the substrate surface comprising elemental metal or an alloy thereof, which process comprises applying to the substrate surface an aqueous solution of a partially neutralised homo- or copolymer of a mono- or polybasic ethylenically unsaturated acid; and heat-curing the layer so formed at a temperature above 180.degree. C.

Growing community of inventors

Hampton, United Kingdom

John W Nicholson