The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2005
Filed:
Oct. 11, 2002
Masayuki Nakajima, Wexford, PA (US);
Charles M. Kania, Natrona Heights, PA (US);
Stephen G. Mcquown, Cheswick, PA (US);
Karen S. Rechenberg, Gibsonia, PA (US);
Susan A. Campbell, Pittsburgh, PA (US);
Kurt A. Humbert, Pittsburgh, PA (US);
Karen A. Barkac, North Huntingdon, PA (US);
Masayuki Nakajima, Wexford, PA (US);
Charles M. Kania, Natrona Heights, PA (US);
Stephen G. McQuown, Cheswick, PA (US);
Karen S. Rechenberg, Gibsonia, PA (US);
Susan A. Campbell, Pittsburgh, PA (US);
Kurt A. Humbert, Pittsburgh, PA (US);
Karen A. Barkac, North Huntingdon, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
A curable film-forming composition of 5 to 95 weight percent (based on the total resin solids weight in the composition) of a crosslinking agent; 5 to 95 weight percent ot a polymer containing functional groups reactive with the crosslinking agent; and 0.01 to 15 weight percent of at least one additive selected from a reaction product of phosporous acid and: at least one diepoxide; at least one diepoxide and at least one anhydride; at least one diepoxide and at least one anhydride, chain extended with at least one diol; at least one monoepoxide and at least one anhydride, chain extended with at least one diepoxide; and mixtures thereof. The additives in the composition prevent thermal oxidation, minimizing visual effects (i.e., yellowing). A multi-component composite coating includes a base coat and a top coat which may be derived from the above curable film-forming composition.