Alkylphenylbisacylphosphine oxides and photoinitiator mixtures

Details Alkylphenylbisacylphosphine oxides and photoinitiator mixtures Alkylphenylbisacylphosphine oxides and photoinitiator mixtures

1997-02-26

2000-02-01

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus containing

568 16, 568 17, C07F 953

Patent

active

060205288

ABSTRACT:
Compounds of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.4 alkyl, R.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy and R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 independently of one another are hydrogen, halogen, C.sub.1 -C.sub.20 alkyl, cyclopentyl, cyclohexyl, C.sub.2 -C.sub.12 alkenyl, C.sub.2 -C.sub.18 alkyl which is interrupted by one or more oxygen atoms, or are phenyl-substituted C.sub.1 -C.sub.4 alkyl, or are phenyl which is unsubstituted or is mono- or disubstituted by C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy with the provisos that at least one of the radicals R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 is other than hydrogen and that, if R.sub.1 and R.sub.2 are methyl, R.sub.3 and R.sub.6 are not methyl, and mixtures of such compounds with .alpha.-hydroxy ketones, benzophenones and .alpha.-amino ketones, are suitable as photoinitiators.

REFERENCES:
patent: 4792632 (1988-12-01), Ellrich
patent: 4868091 (1989-09-01), Boettcher et al.
patent: 4962144 (1990-10-01), Babillis et al.
patent: 5100929 (1992-03-01), Jochum
patent: 5218009 (1993-06-01), Rutsch
patent: 5534559 (1996-07-01), Leppard
Derwent Abst. 91-269010/37 english trans abst of EP0446175 (1988).
Standard Test Method for Yellowness Index of Plastics ASTM Designation: D 1925--70.

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