Process for conditioning phthalocyanine pigment

Details Process for conditioning phthalocyanine pigment Process for conditioning phthalocyanine pigment

1979-11-13

1981-07-14

Randolph, John D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

106 23, 106288Q, C09B 4704

Patent

active

042786010

ABSTRACT:
A process for conditioning pigments which comprises grinding a crude copper phthalocyanine pigment and a crystallizing solvent in the absence of inorganic salt but in the presence of one or more sulphonated phthalocyanine amine derivative having the general formula ##STR1## wherein Pc is a phthalocyanine, R.sup.1, R.sup.3 and R.sup.4 are hydrogen or a hydrocarbon residue, R.sup.2 is a hydrocarbon residue, p is 0 to 3, q is 1 to 4, and the sum of p and q is 1 to 4, the resulting pigment composition is freely dischargeable from the mill in high yield and is, moreover largely in the .beta.-form.

REFERENCES:
patent: 3764360 (1973-10-01), Langley
patent: 3891455 (1975-06-01), Langley et al.
patent: 4055440 (1977-10-01), Wheeler et al.
patent: 4135944 (1979-01-01), Wheeler
patent: 4141904 (1979-02-01), Cabut et al.

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