Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
234 words
A process for the preparation of a pigment composition, which has an X-ray diffraction spectrum resembling the γ-crystal form and does not crystallize on prolonged contact with aromatic solvents, said composition comprising 80-99% by weight of copper phthalocyanine containing 1.5-10% by weight of a sulphonated copper phthalocyanine derivative having the formula: ##STR5## wherein CuPc represents a copper phthalocyannine residue, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, an alkyl group having from 1 to 22 carbon atoms or a cyclic alkyl group havig from 5 to 22 carbon atoms, an aryl, aralkyl, alkaryl or dehydroabietyl group, X represents hydrogen or an alkali metal atom and m, n and p can each be 0 or a value in the range of from 1 to 4, with the proviso that the sum of m, n and p is within the range of from 1 to 4, said process comprising reacting in a substituted aromatic hydrocarbon solvent, at a temperature in the range of from 160° and 220° C., over a period of 3 to 20 hours, a mixture of a phthalic compound, a mono-chlorinated phthalic compound, a nitrogen source, an anhydrous copper salt, a reaction catalyst and from 1 to 20% weight/weight of a sulphonated copper phthalocyanine derivative of formula I; and recovering the pigment composition by separating it from the solvent.
Claim 2
Dependent Claim
234 words
A process for the preparation of a pigment composition, which has an X-ray diffraction spectrum resembling the γ-crystal form and does not crystallize on prolonged contact with aromatic solvents, said composition comprising 80-99% by weight of copper phthalocyanine containing 1.5-10% by weight of a sulphonated copper phthalocyanine derivative having the formula: ##STR5## wherein CuPc represents a copper phthalocyannine residue, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, an alkyl group having from 1 to 22 carbon atoms or a cyclic alkyl group havig from 5 to 22 carbon atoms, an aryl, aralkyl, alkaryl or dehydroabietyl group, X represents hydrogen or an alkali metal atom and m, n and p can each be 0 or a value in the range of from 1 to 4, with the proviso that the sum of m, n and p is within the range of from 1 to 4, said process comprising reacting in a substituted aromatic hydrocarbon solvent, at a temperature in the range of from 160° and 220° C., over a period of 3 to 20 hours, a mixture of a phthalic compound, a mono-chlorinated phthalic compound, a nitrogen source, an anhydrous copper salt, a reaction catalyst and from 1 to 20% weight/weight of a sulphonated copper phthalocyanine derivative of formula I; and recovering the pigment composition by separating it from the solvent.
Claim 3
Dependent Claim
16 words
A process as claimed in claim 1 wherein the phthalic compound is phthalic acid or anhydride.
Claim 4
Dependent Claim
15 words
A process as claimed in claim 1 wherein the mono-halogenated phthalic compound is 4-chlorophthalic acid.
Claim 5
Dependent Claim
13 words
A process as claimed in claim 1 wherein the nitrogen source is urea.
Claim 6
Dependent Claim
16 words
A process as claimed in claim 1 wherein the reaction catalyst is a compound of molybdenum.
Claim 7
Dependent Claim
19 words
A composition comprising an organic material and a pigmenting proportion of a pigment composition as defined in claim 1.
Claim 8
Dependent Claim
18 words
A composition as claimed in claim 6 wherein the organic material is a lacquer, paint or printing ink.