Process for preparing organic pigments having excellent applicat

Details Process for preparing organic pigments having excellent applicat Process for preparing organic pigments having excellent applicat

1985-08-29

1987-04-07

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288Q, C04B 1400

Patent

active

046558454

ABSTRACT:
Process for preparing organic pigments having excellent application properties, which comprises treating finely divided crude pigments of the anthanthrone, pyranthrone, isoviolanthrone, azo, quinacridone, flavanthrone, indanthrone, naphthaldazine, indigo, thioindigo, tetracarboximide, dioxazine, isoindolinone, perylene, anthrapyrimidine, acylanthraquinone, dianthraquinonyl, azoanthraquinone, azomethineanthraquinone and phthalocyanine series at temperatures of 0.degree. C. to 100.degree. C., with acid esters of polyphosphoric acid and a primary, secondary or tertiary alkanol of 1 to 8 carbon atoms, a glycol, glycol ether or phenol, then hydrolyzing the polyphosphate ester used, heating the resultant aqueous mixture to temperatures of 20.degree. C. to 150.degree. C., and isolating the pigment in conventional manner.

REFERENCES:
patent: 3265699 (1966-08-01), Jaffe
patent: 4057436 (1977-11-01), Davies et al.
patent: 4153602 (1979-05-01), Schiessler et al.
patent: 4432796 (1984-02-01), Santimauro
patent: 4522654 (1985-06-01), Chisvette et al.

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