Polymerisable esters derived from a phenolic unsaturated ketone
US4179577A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1977 |
| Grant date | Dec 18, 1979 |
| Priority date | — |
| Expiry date | Dec 27, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/48
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The esters are soluble in an aqueous solution of a base before exposure to actinic radiation but, on exposure to actinic radiation, polymerize and become insoluble in such an aqueous solution. Development of photopolymerized images does not therefore require the use of toxic or flammable organic solvents. They contain free carboxyl groups and at least one unit of the formulae I-IV ##STR1## where R.sup.1 is a carbon atom chain containing specified groupings, such as one of formula --CH.dbd.CH--CO--CH.dbd.CH--, --CH.dbd.CHCO--, --COCH.dbd.CHC.sub.6 H.sub.4 CH.dbd.CHCO--, or ##STR2## and Y is oxygen or sulfur. They are obtained by the reaction of an at least dianhydride of a polycarboxylic acid with alcoholic hydroxyl groups of an alcohol containing at least one unit of formula I-IV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.