N,n-dialkylaniline azo dye solutions

Details N,n-dialkylaniline azo dye solutions N,n-dialkylaniline azo dye solutions

C - Chemistry, Metallurgy

09

B

C09B 29/085 (2006.01) C09B 29/01 (2006.01) C09B 29/08 (2006.01) C09B 31/053 (2006.01) C09B 67/44 (2006.01) C10L 1/00 (2006.01) C10L 1/14 (2006.01) C10L 1/16 (2006.01) C10L 1/18 (2006.01) C10L 1/22 (2006.01)

Patent

CA 2281171

A stabilized, concentrated solution of a diazo dye is prepared by coupling diazotized aniline or substituted aniline with a dialkylaniline in the presence of an aromatic solvent. After removal of the aqueous phase, the solution is stabilized by the addition of a branched chain, primary or secondary, C3-C6 alkyl phenol.

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