Aziende Colori Nazionali Affini Acna S.p.a.

Other

Montecatini Edison S.p.a.

Acna Chimica Organica S.p.a.

Danilo Domenis

Vincenzo Massabo

Ugo Moiso

Giorgio Bornengo

Giorgio Bottaccio

Augusto Menconi

Ruggero Battisti

Giovanni Agnes

Fabrizio Merlo

Zafferino Bozzolasco

This invention relates to improved catalytic process for the manufacture of copper phthalocyanine by allowing phthalic anhydride to react with urea and a copper compound, in the presence of a hydrophobic liquid (dispersing agent), characterized by the presence, along with the catalyst and the dispersing agent, of a promoter selected from particular classes of amides, imides, ureas, thioureas, guanidines, amines or sulphoxides.

Catalytic process for the manufacture of copper phthalocyanine

Pigments of the formula ##STR1## wherein X.sub.1 and X.sub.2 may be the same or different from one another and each is hydrogen, chlorine, fluorine, bromine, lower alkyl having 1 to 3 carbon atoms or alkoxy having 1 to 3 carbon atoms; and wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of pyrazolonyl and substituted pyrazolonyl are obtained by coupling a pyrazolone with a 4,4'-diaminobenzanilide. The pigments are useful in rotogravure inks.

Pyrazolonyl substituted disazo pigments

Yellow pigments having a greenish hue are represented by the formula: ##STR1## wherein X.sub.1 and X.sub.2 may be the same or different from one another and each is hydrogen, halogen (chlorine, fluorine or bromine), lower alkyl or alkoxy having from 1 to 3 carbon atoms; and wherein R.sub.1 and R.sub.2 may be the same or different from one another and each is the residue from an acyl-acetyl-amino-aromatic coupling agent or the residue from a pyrazolone coupling agent. Pigments are obtained by coupling of (1) an aceto-acetyl-amino-aromatic compound or (2) of a pyrazoline, with a 4,4'-diamino-benzanilide. The yellow pigments have the characteristic of having a high tintorial yield, a high degree of purity of tone (brightness), a good fastness to light, and good resistance to organic solvents. These pigments are particularly useful in the polychrome graphic industry.

Diazo compounds obtained by coupling acetoacetanilides with tetrazotized

Hydrosoluble, cationic, azo dyes of the formula: ##SPC1## Wherein:

Hydrosoluble monoazoic cationic dyes and process for preparing same

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Saronno, Italy

Danilo Domenis