US Patent:
20150232671, Aug 20, 2015
Inventors:
- CLEVELAND OH, US
Adam Kolcun - Oakmont PA, US
Brian Okerberg - Gibsonia PA, US
Thor G. Lingenfelter - Evans City PA, US
Roy E. Dean - National Heights PA, US
Assignee:
PPG INDUSTRIES OHIO, INC. - CLEVELAND OH
International Classification:
C09D 5/08
B05D 3/00
Abstract:
A method and corn position for pretreating magnesium substrates prior to the application of a protective and/or decorative surface coating is disclosed. The pretreatment composition comprises (a) a compound containing at least 4 phosphorus acid groups and (b) a soluble alkaline earth salt.