Saburo T Nakahara

US Patent:

43093000, Jan 5, 1982

Filed:

May 4, 1979

Appl. No.:

6/036059

Inventors:

Mervin A. Danforth - Anaheim CA
Julian Giles - Huntington Park CA
Saburo Nakahara - Garden Grove CA

Assignee:

McDonnell Douglas Corporation - Long Beach CA

International Classification:

C09D 900
C11D 722

US Classification:

252170

Abstract:

The surfaces of organic polymeric coatings applied to detail parts or components are subject to contamination and ultraviolet degradation prior to final overcoating procedures. The sources of ultraviolet exposure are light transmission through windows, artificial lighting, or temporary exterior exposure of the detail part coated surface. The ultraviolet light altered surface layer is effectively removed by treatment with a mixture of a glycol ether, an alcohol, a ketone and deionized water, without removing the main body of the coating. This results in good adhesion of a subsequently applied touch-up coating or overcoating. The process can also be used for cleaning metals.