Process for the photopolymerization of vinyl compounds and photopolymerizable materials

US4534839A · kind A · utility

Assignee

• KULZER GMBH · DE

Inventor

• Roland Schaefer · Friedrichsdorf, DE

Key dates

• Filing date: Sep 1, 1982
• Grant date: Aug 13, 1985
• Expiry date: Sep 1, 2002

Classification

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

Abstract

A process for photopolymerization of vinyl compounds and of photopolymerizable materials containing vinyl compounds which is especially useful for dental materials, and compositions useful in said process and the product of said process. The process utilizes a photosensitizer of the formula ##STR1## wherein X is selected from CO, C(R.sup.1)(R.sup.2) or C(R.sup.3)(OR.sup.4), R.sup.1,R.sup.2,R.sup.3,R.sup.4 is selected from hydrogen or a hydrocarbon radical; PA0 n is 0 or 1; and PA0 A are hydrocarbon radicals which may be substituted and which may be bonded together with a proviso that (1) when n is 1 and X is C(R.sup.1)(R.sup.2), and (2) when n is 0, then A is an aromatic radical; and at least one reducing agent of the formula ##STR2## wherein Y is selected from O,S or NR.sup.1, where R.sup.1 is hydrogen or an alkyl group; PA1 Z is an alkylene group with 2 or 3 carbon atoms; wherein one carbon atom can be substituted with one of the heteroatoms O and S or two carbon atoms with at least one of the heteroatoms O,S or N; and PA1 R is a substituted or unsubstituted alkyl or aryl group. Preferably the photoinitiator is camphorquinone as photosensitizer used with at least one reducing age…