Susan K Campbell

US Patent:

6863982, Mar 8, 2005

Filed:

Oct 11, 2002

Appl. No.:

10/269389

Inventors:

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

Assignee:

PPG Industries Ohio, Inc. - Cleveland OH

International Classification:

B32B027/38

US Classification:

428413, 525115, 525131, 5253273, 525340, 525533, 525398

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.