Corrosion and alkali-resistant compositions and methods for using the same
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Abstract
A corrosion resistant, alkali resistant coating composition is disclosed. The composition comprises a binder comprising a reaction product of an epoxy-containing material and a phosphorus-containing material together with a curing agent. Aminoplasts, especially melamine-based aminoplasts, are particularly suitable curing agents. A source of silicon can optionally be included. The compositions also provide excellent adhesion and can be used with or without a weldable primer. The compositions are applied to and cured on a metal substrate.
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Citations
89 Claims
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1-42. -42. (canceled).
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43. A composition comprising:
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a) a reaction product of one or more epoxy-containing materials and one or more phosphorus-containing materials;
b) a curing agent; and
c) elemental silicon, wherein the composition is substantially free of conductive pigments and wherein the equivalent ratio of the phosphorous-containing material to epoxy-containing material is between about 0.3 and 5;
1. - View Dependent Claims (44, 45, 46, 47, 48, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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49. A weldable, corrosion resistant layer deposited on a substrate, wherein the weldable layer provides alkaline resistance to the substrate, is substantially free of conductive pigments, and comprising:
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a) a cured reaction product of (i) a reaction product of at least one epoxy-functional material and at least one phosphorus-containing material, and (ii) a curing agent; and
b) elemental silicon. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A weldable, corrosion resistant layer deposited on a substrate, wherein the weldable layer is of a thickness to provide corrosion resistance without inhibiting welding, is substantially free of conductive pigments, and comprises
a) the cured reaction product of (i) at least one epoxy-functional material and at least one phosphorus-containing material, and (ii) a curing agent; - and
b) elemental silicon wherein the equivalent ratio of the phosphorous-containing material to epoxy-functional material is between 0.3 and 5;
1. - View Dependent Claims (60, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89)
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Specification