Patents Assigned to International Paint
  • Anti-corrosive paint
    Patent number: 4505748
    Abstract: An anti-corrosive coating composition includes an anti-corrosive pigment component comprising (a) a salt comprising a polyvalent metal cation and an organic polyphosphonic acid containing at least 2 phosphonic acid groups and (b) a corrosion passivator capable of modifying the metal oxide film on the metal to be protected to render it more protective. The ratio of the polyphosphonate salt (a) to the passivator (b) in the coating composition is 1:1 to 50:1 by weight.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: March 19, 1985
    Assignee: International Paint
    Inventor: Kenneth F. Baxter