Triarylmethane color formers
US5097034A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1991 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | May 14, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B11/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Color formers of the formula ##STR1## in which X.sup.1 denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy or acyloxy, PA1 R.sup.1 denotes hydrogen, halogen, alkyl or alkoxy, PA1 R.sup.2 denotes hydrogen, alkoxy, aralkoxy, aryloxy or a radical of the formula ##STR2## Y.sup.1 and Y.sup.2, independently of one another, denote alkyl, cycloalkyl or aralkyl, PA1 R.sup.2 can form a heterocyclic ring with A in the o-position, in which a benzene ring can be additionally fused onto ring A in the o-/m-position with respect to R.sup.2, PA1 R.sup.3 denotes hydrogen, alkyl, alkenyl, aralkyl, cycloalkyl or aryl, or R.sup.3 is linked to ring B in the o-position with respect to the nitrogen, PA1 Z.sup.1 stands for the remaining members of a partially hydrogenated or completely hydrogenated ring, with the proviso that Z.sup.1 does not stand for ##STR3## if the dialkylmethyl group is linked to the nitrogen atom, rings A and B and also the cyclic and acyclic radicals can carry further nonionic substituents, find use in thermoreactive papers and pressure-sensitive recording materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.