Coupling process

Details Coupling process Coupling process

C - Chemistry, Metallurgy

09

B

C09B 35/10 (2006.01) C09B 67/08 (2006.01) C09B 67/22 (2006.01) C09D 11/02 (2006.01)

Patent

CA 2075608

Case P-18751/A/MA 2038 Abstract of the Disclosure Coupling Process A process for the production of a diarylide pigment comprising a) coupling a tetrazo component with substantially the stoichiometric proportion of one or more coupling components; b) in the pigment reaction mixture so obtained, coupling a tetrazo component with substantially the stoichiometric proportion required of one or more coupling components, provided that the total number of coupling components used in steps a) and b) is at least three; and c) subjectingthe pigment so obtained to an after-treatment.

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