Abstract: A copolymer is disclosed, having aminobenzoic or substituted aminobenzoic and comonomer repeating units. Methods of preparing the copolymer by polymerizing a reaction mixture comprising aminobenzoic acid in the presence of at least one strong acid and optionally at least one initiator are disclosed. Compositions and films comprising at least one such copolymer, composites comprising a film as described above overlaid by another coating, methods of coating a metal surface with such a composition or film, and methods of protecting a metallic surface comprising applying to the surface a film comprising an electroconductive copolymer as described above are also disclosed.
Abstract: Chromate-free treatments and compositions for applying a conversion or passivation coating for metals, more particularly zinc coated metal surfaces. The methods of the invention comprise contacting the requisite metal surface with a phosphonomethylated polyamine. Other aspects of the invention involve methods and compositions in which the following optional components can be included: fluoacid, silane, inorganic phosphorus, acid, latex film forming component and pH adjustment agent.
Type:
Grant
Filed:
October 29, 2004
Date of Patent:
February 17, 2009
Assignee:
Chemetall Corp.
Inventors:
William S. Carey, Michael T. Raab, Edmund P. Szwajkowski, Jeffrey I. Melzer
Abstract: Chromate-free compositions for applying a conversion or passivation coating for metals, more particularly zinc coated metal surfaces. The methods of the invention comprise contacting the requisite metal surface with a phosphonomethylated polyamine. Other aspects of the disclosed tech involve methods and compositions in which the following optional components can be included: fluoacid, silane, inorganic phosphorus, acid, latex film forming component and pH adjustment agent.
Type:
Application
Filed:
October 10, 2008
Publication date:
February 5, 2009
Applicant:
CHEMETALL CORP.
Inventors:
William S. Carey, Michael T. Raab, Edmund P. Szwajkowski, Jeffrey I. Melzer