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Cathodic electrodeposition coatings containing zinc hydroxyphosphite pigment
U.S. Patent Number: 5382607
Abstract: An improved aqueous electrocoating composition having a binder of an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent; wherein the improvement is the use of zinc hydroxyphosphite pigment as a corrosion inhibitive pigment and an as a curing catalyst which provides an excellent cure under overbake and underbake conditions and forms a coating with excellent chip resistance and the throwing power of the electrocoating composition is significantly improved.
Inventors: Sikora; Robert J. (Detroit, MI), Gam; Allisa (Troy, MI), Chung; Ding Y. (Rochester Hills, MI)
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Application Number: 08/133,684
Issued: 1995-01-17
Expired: 2007-01-17
Classes: 523/415 ; 525/528; 528/45
Field of search: 523/415 525/528 528/45
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