Main > PIGMENT > Phthalocyanine

Product DE. B.

PATENT ASSIGNEE'S COUNTRY Germany
UPDATE 08.99
PATENT ASSIGNEE This data is not available for free
PATENT CLAIMS Process for prepg metal-free phthalocyanine with control of polymorph by reductive cyclization of phthalonitrile in presen
ce of an aliphatic alc., redox catalyst & inorg. base
- Effecting the cyclization in presence of phthalocyanine-sul
fonic acid etc
PATENT PHOTOCOPY Available on request

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