Trisazo black dyes

Details Trisazo black dyes Trisazo black dyes

C - Chemistry, Metallurgy

09

B

260/159, 8/25.2

C09B 33/18 (2006.01) C09B 35/37 (2006.01) D06P 1/06 (2006.01) D21H 21/28 (2006.01)

Patent

CA 1169420

ABSTRACT OF THE DISCLOSURE New trisazo dyes for dyeing leather and cell- ulosics - particularly of the following formula: Image in which -M represents H, Na, X, Li, or N(R)3H wherein R represents H, CH3, C2H5, C3N7, -CH2C2OH, -CH2CH(OH)CH3 or -CH2CH2OCH2CH2OH; -A1 and A2, which may be identical or different, represent the residual moiety of a coupling component which contains at least one amino group or a hydroxy group and wherein said coupling component has the following general structure II and III: Image (II) Image (III) in which -M has the above meaning; -R2 represents -NH2 or -OH; -R2 represents -NH2, -OH, -O-alkyl, -NHCO lower alkyl, -NH aryl, -NH lower alkyl, -N(lower alkyl)2 and -NHCH2COOM; -R3 represents hydrogen, a lower alkyl or SO3M; -R4 represents -H, -NH2, -OH, -O-alkyl, -NHCO lower alkyl, -NH aryl, -NH lower alkyl and -NHCH2COOM; and -n = 0, 1 or 2.

386020

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