Composite quasi-crystalline material
US4405733A · kind A · utility
7Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Aug 3, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A composite quasi-crystalline material made of a polymeric support matrix having disposed therein polar quasi-crystals of photochromic spiropyran complexes, believed to be of the formula A.sub.n B, in which A represents the "colorless" photochromic spiropyran molecule and B represents the colored merocyanine form which is the photolysis product of A, and n is 2 or 3. The polar quasi-crystals are present in the composite material in a substantially polar aligned form. Methods for making the composite material are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.