Azo compounds and polarizing films using the compounds
US5639809A · kind A · utility
3Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jun 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3033
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a polarizing film having high heat resistance and a high degree of polarization and excellent optical properties by dyeing a polymer film with a novel azo compound represented by the following formula (1) or (2): ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.