Photosensitive poly(vinyl alcohol) derivative
US5021505A · kind A · utility
5Cited by
1References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 1, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Dec 1, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/0388
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photosensitive poly(vinyl alcohol) derivative comprising units of the fula ##STR1## wherein R.sub.1 is alkylene, R.sub.2 is hydrogen or a lower alkoxy, ##STR2## is a quaternary aromatic nitrogen-containing heterocycle, X.sup.- is SO.sub.3.sup.- or CO.sub.2.sup.-, m is 0 or 1, and n is an integer of 1 to 6 capable of being developed with an aqueous developing solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.