Photopolymerizable composition
US4071424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1975 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Feb 11, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/921
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A photopolymerizable composition comprising at least one polymerizable ethylenically unsaturated material, for example, an ethylenically unsaturated monomer, and a photosensitive catalyst comprising PA1 A. at least one photosensitizer having the structure ##STR1## where X is >C=O, >CR.sub.1 R.sub.2 or >CR.sub.3 OR.sub.4, especially >C=O, R.sub.1 to R.sub.4 and hydrogen or hydrocarbyl groups, n is 0 or 1, and the groups A are hydrocarbyl or substituted hydrocarbyl groups, the groups A being aromatic or substituted aromatic when n is 1 and X is >CR.sub.1 R.sub.2 and when n is 0, and PA1 B. at least one reducing agent, for example, an amine or a phosphine, capable of reducing the photosensitizer when the photosensitizer is in an excited state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.