Preparation of polyhalo-copper phthalocyanines having a high col

Details Preparation of polyhalo-copper phthalocyanines having a high col Preparation of polyhalo-copper phthalocyanines having a high col

1985-11-15

1987-07-14

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540137, 540138, C09B 4704, C09B 4708

Patent

active

046803874

ABSTRACT:
Finely divided, agglomerated crude polyhalo-copper phthalocyanine is recrystallized (conditioned) by heating the crude pigment with benzoic acid, toluic acid, ethylbenzoic acid or a mixture of these, in the presence of water, at from 80.degree. to 130.degree. C.
The resulting polyhalo-copper phthalocyanine pigments are readily dispersible and of high color strength, and pigmentary forms ranging from transparent to high-hiding can be obtained in a selective manner.
The carboxylic acids used as conditioning media can readily be recovered by acidifying the mother liquor.

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patent: 4452740 (1984-06-01), Pepoy
The Phthalocyanines, vol. II, Manufacture and Applications, (CRC Press, Inc., Boca Raton, Florida, 1983), pp. 41-52.
Phthalocyanine Compounds, (Reinhold Publishing Corporation, New York, 1963), pp. 170-191.

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