Process for preparing copper phthalocyanine pigments of the .alp

Details Process for preparing copper phthalocyanine pigments of the .alp Process for preparing copper phthalocyanine pigments of the .alp

1975-05-05

1977-11-01

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 4704

Patent

active

040565343

ABSTRACT:
Highly pure .alpha.-copper phthalocyanine is obtained when a product regenerated from .alpha.-copper phthalocyanine sulfate by hydrolysis with water is aftertreated in an aqueous medium containing a polar organic non-aromatic compound which is water-soluble or liquid. The aftertreated product has an especially high tinctorial strength, is very easily dispersible and has a very pure reddish-blue shade.

REFERENCES:
patent: 2846441 (1958-08-01), Muehlbauer et al.
patent: 3004986 (1961-10-01), Kirby et al.
patent: 3014917 (1961-12-01), Minnich
patent: 3523030 (1970-08-01), Malin et al.
patent: 3801591 (1974-04-01), Jackson
Robinson et al., J. Am. Chem. Soc., vol. 74, pp. 6294-6295 (1952).
Karasek et al., J. Am. Chem. Soc., vol. 74, pp. 4716-4717 (1952).
Shigemitsu, Bull. Chem. Soc., Japan, vol. 32, pp. 502-505 (1959).

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