Bis(triarylmethane) compounds
US5189188A · kind A · utility
2Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1990 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Oct 31, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B11/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compounds of the general formula ##STR1## in which the symbols have the meaning given in the description, are highly suitable as color formers in recording materials based on acid developers. They give deep blue, green-blue, green, violet or red shades which have excellent sublimation and light fastness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.