Mechanisms of antioxidant action: The role of copper salts in the photostabilization of paint media

✍ Scribed by F Rasti; G Scott

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 335 KB
• Volume: 16
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(80)90019-1

✦ Synopsis

Al~tr,~et--Verdigris, a copper pigment containing basic copper acetate hydrate, is an effective light stabilizer for linseed oil based paint media but gives rise to discolouration over a long period. The antioxidant process is shown to result in the formation of conjugated chromophores in the medium. A catalytic antioxidant mechanism involving redox reactions of the copper ions is proposed to account for the efficiency of the pigment as a light stabilizer.