Photosensitive hydroxylalkylphenones

US4721734A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Juergen Gehlhaus · Heppenheim, DE
• Manfred Kieser · Darmstadt, DE

Key dates

• Filing date: Aug 31, 1984
• Grant date: Jan 26, 1988
• Expiry date: Aug 31, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/124
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, chlorine, phenyl, dialkylamino of 2-4 carbon atoms or alkyl or alkoxy each of up to 18 carbon atoms; R.sub.2 is hydrogen, chlorine, bromine or alkyl or alkoxy each of up to 4 carbon atoms; R.sub.3 and R.sub.4, which can be the same or different, each is hydrogen or alkyl of up to 6 carbon atoms; R.sub.5 is hydrogen or alkyl or alkanoyl each of up to 4 carbon atoms; and R.sub.6 is hydrogen or methyl, with the proviso that not all of R.sub.1 to R.sub.6 simultaneously are hydrogen, are effective photosensitizers, especially for photopolymerization of unsaturated compounds and for hardening of printing dyes.