Manufacture of symmetrical or unsymmetrical monoacetals of aromatic 1,2-diketones

US4287367A · kind A · utility

Assignee

• BASF SE

Inventors

• Werner Kuesters · Ludwigshafen, DE
• Lucien Thil · Schifferstadt, DE

Key dates

• Filing date: Jul 30, 1980
• Grant date: Sep 1, 1981
• Expiry date: Jul 30, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F299/0435
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Monoacetals of aromatic 1,2-diketones are manufactured by reacting the corresponding 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 R.sup.1 and R.sup.2 are identical or different hydrocarbon radicals of 1 to 12 carbon atoms, which may or may not be substituted, n and m are integers from 1 to 3, X is a monobasic, dibasic or tribasic 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.