C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
6/194
C09B 69/06 (2006.01) C09B 67/08 (2006.01) C09B 67/22 (2006.01)
Patent
CA 1245807
COLOR ENHANCED PERMANENT PIGMENTS FROM PRECIPITATED CATIONIC DYES ABSTRACT OF THE DISCLOSURE The present disclosure is concerned with the preparation of permanent pigments from selected cationic dyes by precipitation from aqueous solution with complex heteropoly acids in the presence of selected amine color enhancing agents. Typical of the dyes is Color Index Basic Red 12, typical of the complex heteropoly acid is silicomolybdic acid and typical of the amine color enhancing agents are abietyl amine, cetyl pyridinium chloride and benzyl tri-n-alkyl ammonium chlorides. The pigments are disclosed to have superior cleanliness, brightness and transparency compared to the same pigments prepared without the amine color enhancing agent. These pigments are disclosed to have particular utility in printing inks such as components of process red for four color printing.
493254
Oliver Vincent S.
Prochaska Helmuth H.
Tames Walter
Wieser Karl-Heinz
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Sun Chemical Corporation
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