Process for the preparation of mixtures of metal salts of ring-substituted salicylic acid compounds
US4745203A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Sep 26, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/3335
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Mixtures of a metal salt of formula ##STR1## and a metal salt of formula ##STR2## in which formulae (1) and (2) Me is a metal ion of valency n, PA0 n is 2, 3 or 4, and PA0 each of the rings A and B independently of the other is unsubstituted or substituted by halogen, lower alkyl, lower alkoxy or an .alpha.-methylbenzyl radical, are prepared by reacting 2 moles of salicylic acid with at least 2 moles of a 1-phenylethanol of formula ##STR3## and at least 2 moles of a 1-phenylethanol of formula ##STR4## in which formulae (3) and (4) the benzene rings A' and B' are unsubstituted or substituted by halogen, lower alkyl or lower alkoxy, in the presence of a halide of a polyvalent metal having an atomic weight from 26 to 66 and, in a further step, reacting 2n moles of the resultant mixture of the salicylic acid compound of formula ##STR5## and the salicylic acid compound of formula ##STR6## in which formulae (5) and (6) A and B are as defined for formulae (1) and (2), with 2 moles of the salt of an n-valent metal of an inorganic acid or of a lower aliphatic carboxylic acid, where n has the given meaning. The mixtures of metal salts are particularly suitable for use as color formers in pre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.