Manufacture of unsymmetric monoacetals of aromatic 1,2-diketones employable as photoiniatiators

US4144156A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Apr 14, 1977
• Grant date: Mar 13, 1979
• Expiry date: Apr 14, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/3179
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Unsymmetrical monoketals of aromatic 1,2-diketones ##STR1## wherein R.sup.1 and R.sup.2 are different radicals, are manufactured by reacting the corresponding aromatic 1,2-diketones, in an organic solvent, with an acid ester (R.sup.1).sub.n X as alkylating agent and an alcoholate (R.sup.2 O).sub.m Me, where n and m are integers from 1 to 3, X is an acid radical and Me is a metal of main groups 1 to 3 of the periodic table of the elements. The resulting diketone monoacetals are particularly suitable for use as photoinitiators in photopolymerizable compositions.