Process for the dyeing of paper material

Details Process for the dyeing of paper material Process for the dyeing of paper material

D - Textiles, Paper

06

P

8/4

D06P 3/60 (2006.01) C09B 23/10 (2006.01) D21H 21/28 (2006.01)

Patent

CA 1107462

Case 1-10388+ Canada PROCESS FOR THE DYEING OF PAPER MATERIAL Abstract of the Disclosure A process for the dyeing of paper material from an aqueous medium, comprising the use of at least one water-soluble dye of the formula Image (I) wherein Py represents a pyridyl group of the formula Image or Image , - 1 - R1 represents optionally substituted lower alkyl, allyl, or benzyl, R2 represents hydrogen, halogen, methyl or ethyl, R3 represents hydrogen, methyl, ethyl or phenyl, R4 represents hydrogen, optionally substituted lower alkyl, or allyl, and A? represents an anion. - 1a -

274079

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