Acetals which act as photoinitiators

US4007209A · kind A · utility

Assignee

• Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

• Eckhard Hickmann · Schifferstadt, DE
• Martin Fischer · Ludwigshafen, DE
• Otto Volkert · Bad Dürkheim, DE
• Mong-Jon Jun · Speyer, DE

Key dates

• Filing date: Mar 10, 1975
• Grant date: Feb 8, 1977
• Expiry date: Mar 10, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/031
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to special acetals of benzoin compounds which act as photoinitiators, and to a technically simple manufacturing process involving the reaction of an appropriate .alpha.- or .beta.-hydroxyketone with an .alpha.,.beta.-olefinically unsaturated ether in the presence of an acid catalyst. The acetals are particularly suitable for use as photoinitiators in the preparation of photopolymer printing plates.