C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/00 (2006.01) C09B 67/00 (2006.01) C09B 67/12 (2006.01) C09D 11/02 (2006.01)
Patent
CA 2190327
1. A process for the preparation of an ink concentrate which comprises (a) milling a crude metal phthalocyanine to reduce the particle size thereof, thereby forming a modified crude metal phthalocyanine and (b) kneading a mixture of the modified crude metal phthalocyanine together with an ink vehicle comprising one or more ink solvents, the metal phthalocyanine being present in an amount of 20 to 80% by weight of the kneaded mixture, to give an ink concentratecontaining the metal phthalocyanine in pigmentary form dispersed in the ink vehicle.
Dykes Kenneth Grant
Kerwin Paul
Langley Robert
Walls Arthur Stark
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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