Process for preparing copper phthalocyanine pigments of the...

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

C - Chemistry, Metallurgy

09

B

260/197, 260/199

C09B 47/04 (2006.01) C09B 67/12 (2006.01)

Patent

CA 1037473

PROCESS FOR PREPARING COPPER PHTHALOCYANINE PIGMENTS OF THE .alpha.-MODIFICATION Abstract of the Disclosures Highly pure .alpha.-coppar 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 dispor- sible and has a very pure reddish-blue shade.

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