Polymers for reversible photoinduced sol gel transitions
US5990193A · kind A · utility
15Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1995 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Dec 12, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/039
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides crosslinked polymeric networks that are reversibly crosslinked upon exposure to light of a suitable wavelength. In one embodiment photocrosslinkable branched hydrophilic polymers containing photochromic groups are synthesized. Cinnamylidene groups and derivatives of cinnamylidene are preferably used as the photochromic agents or photocrosslinking agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.