Aminoaryl ketone photoinitiators
US4992547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1988 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Jun 14, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The photopolymerizable mixture described contains PA1 (A) at least one ethylenically unsaturated photopolymerisable compound, PA1 (B) a photoinitiator of the formula I ##STR1## and (C) a photosensitiser from the group of aromatic carbonyl compounds having a triplet energy of 225-310 kJ/mol, for example xanthones, thioxianthones, coumarins, phthalimides, phenones and the like. Ar is phenyl substituted in the 4-position by a substituted amino group, R.sup.1 and R.sup.2 are alkyl, R.sup.3 and R.sup.4 are alkyl or alkoxyalkyl, or R.sup.3 and R.sup.4 together are 3-oxapentamethylene. Said sensitisers (C) raise the activity of said photoinitiators (B) without shortening the shelf life of the mixtures. The photocurable mixtures are used especially as binders for printing inks or paints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.