Compositions: coating or plastic – Materials or ingredients
Patent
1977-09-20
1979-01-23
Douglas, Winston A.
Compositions: coating or plastic
Materials or ingredients
106308N, 106308S, 2603145, C08K 534
Patent
active
041359445
ABSTRACT:
A single stage process for the production of copper phthalocyanine pigment compositions having x-ray diffraction spectra corresponding to the form of pure, or substantially pure .epsilon.-crystal modification of copper phthalocyanine comprising reacting, at an elevated temperature and in an organic solvent, an organic compound capable of forming the phthalocyanine ring system, a copper compound capable of providing the copper atom of the phthalocyanine molecule, a reaction catalyst, and a nitrogen source, in the presence of, as crystal form modifier, a compound of the formula: ##STR1## where Pc represents a copper phthalocyanine residue, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are the same or different and each is a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl, aralkyl, alkaryl, cycloalkaryl or dehydroabietyl group, the alkyl and cycloalkyl groups being optionally unsaturated and/or interrupted by heteroatoms, M represents hydrogen or an alkali metal atom and x, y and z are each in the range of from 0 to 4 with the proviso that the sum of x, y and z is within the range of from 1 to 4. Very red shade copper phthalocyanine pigment compositions of the advantageous .epsilon.-modification can be produced in a single stage without the use of high shear forces.
REFERENCES:
patent: 3891455 (1975-06-01), Langley et al.
patent: 4055440 (1977-10-01), Wheeler et al.
Cavalieri Vincent J.
Ciba-Geigy Corporation
Douglas Winston A.
Glynn Michael W.
Howard Jacqueline V.
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