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Aziende Colori Nazionali Affini ACNA SpA
ACNA Chimica Organica SpA
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Aziende Colori Nazionali Affini ACNA SpA
ACNA Chimica Organica SpA
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Improvements in the object of the main patent no. 257,387, by a procedure for dyeing polyolefinic materials, characterized by using a polyazoic dye having the general formula: X1 - R - N = N - R1 - N = N - (R2 - N = N-) n - R3X in which R1, R2, R or R3 are aromatic groups, preferably benzene groups, substituted or not with alkyl radicals, halogens, nitric groups, trifluoromethyl groups and/or amino groups, mono- or disubstituted with Alkyl radicals, R3 can also be a radical of an open-chain ketoanolic compound, capable of coupling with diazo compounds, R or R3 being different from R1, R or R3 are radicals of a heterocyclic compound, preferably pyrazolones, indazole, thiazole, benzothiazole or thiophenol, whether or not substituted by alkyl, aryl or oxyalkyl groups, halogens, trifluoromethyl groups or nitric groups; n is 0 or 1, X is a hydroxyl or amino group or an amino group mono- or disubstituted with alkyl, cyanoalkyl or aryl radicals, and X1 is X or H. (Machine-translation by Google Translate, not legally binding)
ES0263522A1959-12-241960-12-23A procedure to dye poliolephinic materials (Machine-translation by Google Translate, not legally binding)
ExpiredES263522A2
(en)