Curable, weldable coating compositions
First Claim
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1. An aqueous-based curable coating composition comprising:
- a. a resinous binder comprising i. a reaction product of an epoxy-containing polymer with a compound containing phosphorus acid groups, the reaction product having reactive functional groups, ii. a curing agent having functional groups reactive with the functional groups of (i);
b. an electroconductive pigment dispersed in (a) such that the weight ratio of b to (i) plus (ii) is within the range of 0.5 to 9.0;
1; and
c. water, the coating composition being characterized such that when it is deposited and cured on a metal substrate, the cured coating is weldable.
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Abstract
A curable coating composition is disclosed comprising a resinous binder comprising (a) a reaction product of an epoxy-containing polymer with a compound containing phosphorus acid groups, the reaction product having reactive functional groups, and (b) a curing agent having functional groups reactive with the functional groups of (a). An electroconductive pigment is dispersed in (a) such that the weight ratio of the electroconductive pigment to (a) plus (b) is within the range of 0.5 to 9.0:1. When the curable coating composition is deposited and cured on a metal substrate, the cured coating is weldable.
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Citations
5 Claims
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1. An aqueous-based curable coating composition comprising:
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a. a resinous binder comprising i. a reaction product of an epoxy-containing polymer with a compound containing phosphorus acid groups, the reaction product having reactive functional groups, ii. a curing agent having functional groups reactive with the functional groups of (i);
b. an electroconductive pigment dispersed in (a) such that the weight ratio of b to (i) plus (ii) is within the range of 0.5 to 9.0;
1; and
c. water, the coating composition being characterized such that when it is deposited and cured on a metal substrate, the cured coating is weldable. - View Dependent Claims (2, 3, 4, 5)
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Specification
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Current AssigneePPG Industries Ohio Incorporated (Nouryon BV)
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Original AssigneePPG Industries Ohio Incorporated (Nouryon BV)
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InventorsPawlik, Michael J., Perrine, Steven D., Van Buskirk, Ellor James, Jones, Dennis W., Nugent, Richard M. Jr., Gray, Ralph C., Jones, James E., Coldren, Kathleen M.
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Primary Examiner(s)SELLERS, ROBERT E
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Application NumberUS10/803,391Publication NumberTime in Patent Office663 DaysField of Search523/416, 523/458, 523/459, 523/468, 523/409, 523/412, 523/414, 523/415, 523/417, 525/124, 525/127, 525/151, 525/182, 525/208, 525/327.2, 525/423, 525/502, 525/503, 525/504, 525/506, 525/510, 525/523US Class Current523/416CPC Class CodesB23K 35/226 Non-corrosive coatings; Pri...C08G 59/304 containing phosphorusC09D 163/00 Coating compositions based ...
