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US 4,540,736 AGranted
Temporary protective coating composition of ethylene and acrylic acid and a base
AssigneeAllied Corporation
InventorsJoris F. A. Herten, Emile M. Devroede
Life of this patent
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Abstract
The aqueous, liquid composition, the method of preparation of the composition, and the method of use of the composition as a temporary coating. The composition comprises water, a copolymer of ethylene and an alpha,beta-ethylenically unsaturated carboxylic acid having a number average molecular weight of from about 500 to 5000 and an acid number of at least 100 milligrams of potassium hydroxide necessary to neutralize one gram of copolymer. There should be a sufficient amount of a base which is preferably volatile, to form a clear, aqueous liquid composition.
Claims9
A method comprising the steps of:
- coating a strippable coating composition onto a substructure, the coating composition comprising water, a sufficient amount of a base to form a clear aqueous liquid composition, and from 0.1% to 20% by weight of a copolymer of ethylene and an emulsifiable alpha,beta-ethylenically unsaturated carboxylic acid having at least one carboxylic group and 3 to 8 carbon atoms, the copolymer having a number average molecular weight of from 500 to 5,000 and an acid number of at least 100 milligrams of potassium hydroxide necessary to neutralize one gram of the copolymer;
- and
- washing the coating composition off of the substructure with a basic solution.
Dependencies are inferred from the claim text.