Water reducible alkyd resin coating composition
AssigneeE. I. Du Pont de Nemours and Company
InventorsLester I. Miller, Thomas J. Smearing
Life of this patent
Estimating the term…
Abstract
A water reducible coating composition that by the addition of a solution of water and an amine or ammonia forms a sprayable nonair polluting coating composition that can be dried at ambient temperatures and is useful for coating metal or plastic substrates and in particular for finishing or repairing automobiles and trucks; the coating composition contains a water soluble organic solvent, a binder and pigments. The binder is of (1) an alkyd resin that is preferably the esterification product of soya oil fatty acids, trimellitic anhydride isophthalic acid and trimethylol propane; (2) an alkylated melamine formaldehyde resin, (3) an acrylic dispersing resin and (4) an organo metallic drier.
Claims20
A coating composition comprising about 40-90% by weight of a film forming binder and about 10-60% by weight of a water soluble organic solvent and pigments in a pigment to binder weight ratio of about 1:100 to 300:100;
- wherein the binder consists essentially of about
- (1) 60-90% by weight, based on the weight of the binder, of an alkyd resin consisting essentially of the esterification product of soya oil fatty acid, isophthalic acid, trimellitic acid or its anhydride and trimethylol propane having an acid number of about 20-100 and a weight average molecular weight of about 800-15,000 determined by gel permeation chromatography;
- (2) 0.5-15% by weight, based on the weight of the binder, of an alkylated melamine formaldehyde resin;
- (3) 1-20% by weight, based on the weight of the binder, of an acrylic dispersing resin comprising styrene, an alkyl methacrylate, an alkyl acrylate and an ethylenically unsaturated carboxylic acid;
- and
- (4) 0.5-5% by weight, based on the weight of the binder, of an organo metallic drier.
A coating composition comprising about 40-90% by weight of a film forming binder and about 10-60% by weight of a water soluble organic solvent and pigments in a pigment to binder weight ratio of about 1:100 to 75:100;
- wherein the binder consists essentially of about
- (1) 50-90% by weight, based on the weight of the binder, of an alkyd resin consisting essentially of the esterification product of soya oil fatty acids, isophthalic acid and trimethylol propane having an acid number of about 20-100 and a weight average molecular weight of about 800-15,000 determined by gel permeation chromatography;
- (2) 0.5-5% by weight, based on the weight of the binder, of an alkylated melamine formaldehyde resin;
- (3) 9-20% by weight, based on the weight of the binder, of an acrylic dispersing resin consisting essentially of styrene, an alkyl methacrylate, an alkyl acrylate and an ethylenically unsaturated carboxylic acid;
- and
- (4) 0.5-5% by weight, based on the weight of the binder, of an organo metallic drier.
Dependencies are inferred from the claim text.