C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 17/02 (2006.01) C09B 17/00 (2006.01) C09B 67/54 (2006.01)
Patent
CA 2046939
-15- ABSTRACT OF THE DISCLOSURE Disclosed is the process for the preparation of dye having excellent heat- and light-resistance. The dye can preferably be employed as a colorant for heat-resistant resin materials such as polyamide, as a colorant and a charge control agent for an electro- static image developing toner (i.e. positively chargeable toner), and as a colorant for writing ink composition having a good aging sta- bility. The process of the present invention comprising (a) mixing crude azine dye, produced by condensation of anilines or aniline hydrochlorides with nitrobenzenes in the presence of catalysts, with organic solvents; and (b) extracting by-products from the crude azine dye mixture.
Akiyama Kazutoshi
Matsubara Sadahiko
Kirby Eades Gale Baker
Orient Chemical Industries Ltd.
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