Coating compositions for use on substrates
AssigneeSpraylat Corporation
InventorAnthony R. Ricca
Life of this patent
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Abstract
The present invention is directed to a coating composition comprising a pigment, a water-dispersible urethane resin, and a solvent effective amount of a water-soluble solvent. The water-dispersible urethane resin exists as a colloidal dispersion in water but when mixed with a water-soluble solvent swells to provide a dispersion having a viscosity sufficiently high in the solvent so as to maintain the pigment in suspension in the solvent for a time sufficient to apply the coating composition. The present invention is also directed to a method for coating a substrate with the novel coating composition and to a coated substrate prepared by the novel method.
Claims18
A conductive coating composition consisting essentially of in percentages by weight of the total composition:
- (a) a conductive metal present in an amount from about 5% to about 95%;
- (b) a water-dispersible urethane resin present in an amount from about 1% to about 40%;
- and
- (c) a solvent effective amount of a water-soluble solvent;
- wherein the water-dispersible urethane resin may be represented by Formula (1).
- wherein (i) R1 is a straight chain alkyl group having from about 6 to about 15 carbon atoms;
- R2 is a straight chain alkyl group having from about 5 to about 10 carbon atoms;
- R3 is a straight chain alkyl group having from about 2 to about 6 carbon atoms;
- +NR4 is selected from the group consisting of +NH4 and amine salts having from about 1 to about 9 carbon atoms;
- (ii) the ratio of n1:n2:n3 is from about 0.2:1:0.8 to about 0.8:1:0.2;
- and (iii) the molecular weight of the water-dispersible urethane resin is from about 100,000 to about 200,000, Z average molecular weight.
A method for coating a substrate with a conductive coating composition which consists essentially of the steps of:
- (1) providing a conductive coating composition comprising in percentages by weight of the total composition:
- (a) a conductive metal present in an amount from about 5% to about 95%;
- (b) a water-dispersible urethane resin present in an amount from about 1% to about 40%;
- and
- (c) a solvent effective amount of a water-soluble solvent;
- wherein the water-dispersible urethane resin may be represented by Formula (1):
- wherein (i) R1 is a straight chain alkyl group having from about 6 to about 15 carbon atoms;
- R2 is a straight chain alkyl group having from about 5 to about 10 carbon atoms;
- R3 is a straight chain alkyl group having from about 2 to about 6 carbon atoms;
- +NR4 is selected from the group consisting of +NH4 and amine salts having from about 1 to about 9 carbon atoms;
- (ii) the ratio of n1:n2:n3 is from about 0.2:1:0.8 to about 0.8:1:0.2, and (iii) the molecular weight of the water-dispersible urethane resin is from about 100,000 to about 200,000, Z average molecular weight;
- and
- (2) applying the coating composition to a substrate.
A conductive coated substrate prepared by a method which consists essentially of the steps of:
- (1) providing a conductive coating composition comprising in percentages by weight of the total composition:
- (a) a conductive metal present in an amount from about 5% to about 95%;
- (b) a water-dispersible urethane resin present in an amount from about 1% to about 40%;
- and
- (c) a solvent effective amount of a water-soluble solvent;
- wherein the water-dispersible urethane resin may be represented by Formula (1):
- wherein (i) R1 is a straight chain alkyl group having from about 6 to about 15 carbon atoms;
- R2 is a straight chain alkyl group having from about 5 to about 10 carbon atoms;
- R3 is a straight chain alkyl group having from about 2 to about 6 carbon atoms;
- +NR4 is selected from the group consisting of +NH4 and amine salts having from about 1 to about 9 carbon atoms;
- (ii) the ratio of n1:n2:n3 is from about 0.2:1:0.8 to about 0.8:1:0.2, and (iii) the molecular weight of the water-dispersible urethane resin is from about 100,000 to about 200,000, Z average molecular weight;
- and
- (2) applying the coating composition to a substrate.
Dependencies are inferred from the claim text.