Trisazo black dyes

Details Trisazo black dyes Trisazo black dyes

C - Chemistry, Metallurgy

09

B

260/159, 8/25.2

C09B 31/16 (2006.01) C09B 35/362 (2006.01) C09B 67/22 (2006.01) C09B 67/26 (2006.01) D06P 1/02 (2006.01) D06P 3/32 (2006.01) D21H 21/28 (2006.01)

Patent

CA 1262723

Trisazo Black Dyes Abstract of the Disclosure Black trisazo dyes for cellulosic textiles, leather and especially paper having the structure Image where A is Image or Image one of B1 and B2 is hydrogen and the other is -SO3M or a mixture thereof, and M is hydrogen, sodium, potassium, lithium or -HNR1R2R3 wherein R1, R2 and R3 represent the same or different substituents selected from hydrogen, lower alkyl and lower hydroxyalkyl, and stable liquid concentrates of these dyes are described.

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