Polymer for reversible photoinduced sol gel transitions
US6174645A · kind A · utility
5Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1999 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | May 3, 2019 |
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.