Photoinitiators for photopolymerizable coating compositions

US4131529A · kind A · utility

Assignee

• BASF SE

Inventors

• Rolf Osterloh · Lechenich, DE
• Manfred Jacobi · Bischofswerda, DE
• Werner Kuesters · Ludwigshafen, DE

Key dates

• Filing date: May 13, 1977
• Grant date: Dec 26, 1978
• Expiry date: May 13, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31649
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Photopolymerizable coating compositions contain, as the binder, olefinically unsaturated compounds having a boiling point above 50.degree. C, together with from 0.5 to 15% by weight of photoinitiators, based on the binder. The photoinitiators are a mixture of an aromatic carbonyl compound A, which is a derivative of benzoin or benzil, which has at least one carbon-oxygen single bond in the .alpha.-position relative to the carbonyl group, an aromatic carbonyl compound B which is derived from benzophenone, fluorenone, anthraquinone, xanthene, thioxanthone or acridone, and an amine C of the general formula ##STR1## where R', R" and R"' are H, alkyl of 1 to 10 carbon atoms, cycloalkyl of 3 to 10 carbon atoms, aryl, hydroxyalkyl of 1 to 8 carbon atoms or alkoxyalkyl of 2 to 4 carbon atoms, but at most 2 substituents are H and at most 2 substituents are aromatic. These coating compositions may be used for finishing various substrates, as fillers or as printing inks.