Thickeners for print pastes composed of cross-linked maleic anhydride-alkyl vinyl ether polymers

Claim 1

A PRINT PASTE FOR PRINTING FIBERS AND TEXTILE MATERIAL SAID PRINT PASTE CONSISTING ESSENTIALLY OF (1) A DYE SELECTED FROM THE GROUP CONSISTING OF VAT DYES, SUBSTANTIVE DYES, DISPERSE DYES, METAL COMPLEX DYES, AND PIGMENT DYES, (2) WATER AND (3) FROM 0.1 TO 7% BY WEIGHT, WITH REFERENCE TO THE TOTAL WEIGHT OF THE PRINT PASTE OF SOLIDS FROM A THICKENER WHICH HAS BEEN OBTAINED BY: A. CROSSLINKING A COPOLYMER OF 10 TO 70 MOLE% OF MALEIC ANHYDRIDE, 20 TO 70 MOLE% OF AN ALKYL VINYL ETHER HAVING 1 TO 4 CARBON ATOMS IN THE ALKYL GROUP AND 0 TO 40 MOLE% OF ONE OR MORE COMONOMERS SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE, STYRENE, ETHYLENE, PROPYLENE, ACRYLAMIDE, METHACRYLAMIDE, ESTERS OF ACRYLIC ACID AND METHACTYLIC ACID WITH ALCOHOLS CONTAINING 1 TO 4 CARBON ATOMS AND THE ACETIC AND PROPIONIC ESTERS OF VINYL ALCOHOL, SAID PERCENTAGES BEING WITH REFERENCE TO ALL THE MONOMERS, IN AN INERT WATER-IMMISCIBLE ORGANIC DILUENT WITH FROM 0.2 TO 5% BY WEIGTH, WITH REFERENCE TO THE SOLIDS CONTENT OF THE COMPOLYMER, OF A CROSSLINKING AGENT SELECTED FROM THE GROUP CNSISTING OF ETHYLENEIDAMINE, DIETHYLENETETRAMINE, HEXAMETHYLENEDIAMINE, MONOETHANOLAMINE, DICTHANOLAMINE, TRICTHANOLAMINE, PROPANOLAMINE GLYCOL, BUTANEDIOL AND GLYCEROL, SAID CROSSLINKING BEING EFFECTED BY ADDING CROSSLINKING AGENT TO THE COMPOLYMER, AND B. NEUTRALIZING SAID CROSSLINKED COPOLYMER BY ADDING AN AQUEOUS SOLUTION OF AMMONIA OR SODIUM HYDROXIDE OR BY PASSING IN AMMONIA GAS.