Method of crease-proofing cellulosic fabrics and fabrics obtained

Claim 1

A PROCESS OF TREATING A TEXTILE MATERIAL OF CELLULOSE FIBERS WHICH COMPRISES IMPREGNATING THE MATERIAL WITH AN AQUEOUS SOLUTION CONTAINING (A) 5 TO 20% BY WEIGHT OF N-METHYLOL-ACRYLAMIDE, (B) A CONDENSATE WHICH NORMALLY PICKS UP CHLORINE, COMTAINING AT LEAST 2 N-METHYLOL GROUPS, OF FORMALDEHYDE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF UREA, N,N''-ETHYLENEUREA, AND MELAMINE, THE WEIGHT RATIO OF (A) TO (B) BEING FROM 5:1 TO 4:3, AND (C) ACIDIC CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF (1) A WATER-SOLUBLE FREE-RADICAL POLYMERIZATION INITIATOR OF ACIDIC CHARACTER AT A CONCENTRATION OF 1/10 TO 3% BY WEIGHT AND (2) A MIXTURE OF A WATER-SOLUBLE FREE-RADICAL POLYMERIZATION INITIATOR SELECTED FROM THE GROUP CONSISTING OF NEUTRAL AND ACIDIC INITIATORS AT A CONCENTRATION 1/10 TO 3% BY WEIGHT AND A WATER-SOLUBLE ACIDIC CATALYST, OTHER THAN A POLYMERIZATION INITIATOR, FOR THE ETHERIFICATION REACTION OF THE METHYLOL GROUPS OF (A) AND (B), WITH HYDROXYL GROUPS OF THE CELLULOSE AT A CONCENTRATION OF ABOUT 0.05 TO 1% BY WEIGHT, THE PERCENTAGES BEING BASED ON THE TOTAL WEIGHT OF SOLUTION, AND SUBSEQUENTLY HEATING THE IMPREGNATED MATERIAL AT A TEMPERATURE OF ABOUT 105* TO 205*C. UNTIL CROSS-LINKING OF THE CELLULOSE IS OBTAINED.