Conversion of crude copper phthalocyanines to a pigmentary form

Details Conversion of crude copper phthalocyanines to a pigmentary form Conversion of crude copper phthalocyanines to a pigmentary form

1976-11-08

1978-08-01

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8 1XA, 106288Q, 106308N, 106309, 2602422, 260270P, 260299, C09B 4704

Patent

active

041042760

ABSTRACT:
A process for converting crude copper phthalocyanine to a pigmentary form, wherein finely divided and heavily agglomerated crude copper phthalocyanine which exhibits disturbed crystallization and which has a primary particle size of less than 0.1 .mu.um is introduced into an organic or aqueous organic medium together with from 0.5 to 7% by weight, based on the crude copper phthalocyanine, of a basic copper phthalocyanine of the formula ##STR1## or of mixtures thereof (where CuPc is an n-valent copper phthalocyanine radical, R.sup.1 is H or alkyl of 1 to 4 carbon atoms, A is linear or branched alkylene, R.sup.2 is alkyl of 1 to 20 carbon atoms, alkoxyalkyl of 3 to 12 carbon atoms or cycloalkyl of 6 to 8 carbon atoms, R.sup.3 is H, alkyl of 1 to 4 carbon atoms or cycloalkyl of 6 to 8 carbon atoms or ##STR2## is a saturated heterocyclic 5-membered, 6-membered or 7-membered ring, and n is an integer from 1 to 6), and the suspension is heated at from room temperature to 180.degree. C until the pigment exhibits optimum tinctorial strength. Pigments of high tinctorial strength, which give colorations having a pure hue, are obtained.

REFERENCES:
patent: 2857400 (1958-10-01), Cooper
patent: 3119835 (1964-01-01), Schmidt
patent: 3201051 (1965-08-01), Manger et al.
patent: 3523030 (1970-08-01), Malin et al.

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