Photopolymerizable compositions containing aminoaryl ketone photoinitiators
US5145885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The photopolymerizable composition described contains PA0 A) at least one ethylenically unsaturated photopolymerizable compound, PA0 B) a photoinitiator of the formula I ##STR1## and C) a photosensitizer from the group of aromatic carbonyl compounds having a triplet energy of 225-310 kJ/mol, for example xanthones, thioxanthones, 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 sensitizers 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.