Triarylmethane color formers
US5233048A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Sep 8, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B11/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Color formers of the general formula ##STR1## in which --independently of one another-- R.sup.1 and R.sup.2 are hydrogen, halogen, alkyl, aralkyl etc., PA1 Y.sup.1 and Y.sup.2 are alkyl, aryl, cycloalkyl or aralkyl, PA1 X.sup.1 is alkyl, alkenyl, cycloalkyl, aralkyl etc., PA1 X.sup.2 is H, alkyl, alkenyl, cycloalkyl etc. PA1 X.sup.1 with X.sup.2 with the inclusion of the nitrogen atom carrying them can form a saturated or unsaturated 5- or 6-membered heterocyclic ring, and further isocyclic or heterocyclic rings can be fused with the rings A, B and C, upon incorporation in recording materials based on acid developers, show a particularly advantageous migration behaviour. Deep blue, green-blue, green, violet or red shades which have excellent sublimation and light fastness are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.