C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 47/04 (2006.01) C09B 67/12 (2006.01) C09B 67/22 (2006.01) C09D 7/00 (2006.01) C09D 7/12 (2006.01) C09D 11/02 (2006.01)
Patent
CA 2129793
A process for the production of a copper phthalocyanine pigment which gives a printing ink having excellent gloss and excellent fluidity and a coating composition having excellent gloss and excellent fluidity, the process comprising wet-milling at least one crude copper phthalocyanine selected from the group consisting of halogen-free copper phthalocyanine, monohalogenated copper phthalocyanine and semi-halogenated copper phthalocyanine in the presence of an inorganic salt as a milling aid and an organic liquid selected from an alcohol and a polyol, and then removing the above inorganic salt and the above organic: liquid, wherein 0.1 to 20 % by weight, based on the crude copper phthalocyanine, of a compound of the following formula (1) is added before or during the wet-milling, NePc-(SO3-+NR1R2R3R4)n (1) wherein Me represents two hydrogen atoms or at least one metal selected from the group consisting of A1, Fe, Co, Ni, Cu and Zn, Pc is a phthalocyanine residue, each of R1, R2, R3 and R4 is independently a hydrogen atom, an alkyl group having 1 to 30 carbon atoms, a substituted alkyl group having 1 to 30 carbon atoms or a polyoxy lower alkylene group and n is an integer of 1 to 8, provided that at least one of R1, R2, R3 and R4 is an alkyl group having at least 10 carbon atoms or a polyoxy lower alkylene group.
Ikegaya Toshimitsu
Kato Shigeki
Maki Hitoshi
Sawamura Katsuhiko
Smart & Biggar
Toyo Ink Manufacturing Co. Ltd.
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