Cumarinic pigments
AssigneeMontedison S.p.A.
InventorsRuggero Battisti, Giovanni Bausani, Francesco Casagrande, Nicola Mazzaferro
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Abstract
The present invention concerns a new class of pigments derived from cumarin and, more particularly, of bis-iminocumarinic and bis-cumarinic pigments having the following formula I described hereinlater. The present invention also includes novel processes for making the cumarinic pigments of the invention. Also, the invention relates to the use of the novel pigments of the invention for the preparation of paints, storing enamels, inks and pastes for the printing of fabrics. Also, included in this invention is the dyeing of plastic materials with the novel cumarinic pigments.
Claims5
Cumarinic pigments of formula (I):
- ##STR33## wherein:
- A represents a group selected from the group consisting of phenyl, naphthyl, anthraquinonyl, an heterocyclic group and any of the foregoing groups substituted with groups selected from the group consisting of hydroxyl, halogens, the alkyl and/or alcoxyl groups having 1 to 4 carbon atoms, the carboxyl, the carbamoyl, the benzamidic, the acylaminic, the benzoylaminic, the dialkylaminic groups having from 1 to 4 carbon atoms in the alkyl, the cyano-, the ureidic, the thioureidic, the trifluoromethylic, the sulphomethylic, the nitro, the arylazo groups also in their turn substituted in the aryl group with a group selected from the group consisting of alkylic and alcoxylic groups having up to 4 carbon atoms, the halogen and the cyano-groups;
- X represents NH or O.
Process according to claims, 1, 2, 3 or 4 characterized in that the organic basic catalyst is selected from the group consisting of pyridine, piperidine, the N-alkylpiperidines having up to 4 carbon atoms in the alkyl, pyrrolidone, morpholine and triethylamine, in molar quantities comprised between 0.01 and 0.2 mols per mol of aldehyde (III).
Dependencies are inferred from the claim text.