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Corrosion and alkali-resistant compositions and methods for using the same

  • US 7,141,619 B2
  • Filed: 06/30/2004
  • Issued: 11/28/2006
  • Est. Priority Date: 11/06/2002
  • Status: Expired due to Term
First Claim
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1. An aqueous-based composition comprising:

  • a) the reaction product of one or more epoxy-containing materials and phosphoric acid; and

    b) a curing agent, andc) water,wherein the composition has a volatile organic compound content of less than 2.4 as determined by Method 24,wherein the equivalent ratio of the phosphoric acid to epoxy-containing material is between 1.6;

    1 and 5;

    1,wherein the composition comprises <

    1 weight percent of conductive pigment, andwherein the composition is capable of producing a coating layer on a substrate, wherein the layer has (i) a thickness of less than or equal to 2.2 microns, and (ii) 10 percent or less coating removal when tested according to ASTM E643 or ASTM D2794-93.

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