C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
6/198
C08K 5/34 (2006.01) C09B 47/06 (2006.01) C09B 67/22 (2006.01) C09B 67/50 (2006.01)
Patent
CA 1088703
PIGMENT COMPOSITION Abstract of the Disclosure A single stage process for the production of copper phtha- locyanine 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:- Image I wherein Pc represents a metal or metal-free phthalocyanine residue, preferably a transition metal phthalocyanine residue, R1, R2, R3, R4, R5 and R6 are the same or different -1- and each is a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl, aralkyl, alkaryl, cycloalkaryl or dehydro- abietyl 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. - 1a -
287015
Ag Ciba-Geigy
Fetherstonhaugh & Co.
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