Black dichroic dye
US9057020B2 · kind B2 · utility
1Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2011 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Jul 31, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Described is a black dichroic dye composition comprising 2 or more dyes, wherein at least one dye, generally a red dye and optionally a yellow dye, conforms to the formula A and at least one dye, usually a blue dye, conforms to the formula B Ar1—N═N—[Ar2—N═N—]qAr3—N═N—Ar4 (B) with symbols as defined in present claims. The dye composition is well suited for combination with liquid crystal material for use, inter alia, as polarizing film and/or in liquid crystal displays, showing, inter alia, high dichroic ratio and excellent compatibility with the LC material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.