Process for the production of dyed cellulosic textile materials with wet and dry wrinkle resistance

Claim 1

A PROCESS FOR PRODUCING A DYED CELLULOSIC TEXTILE MATERIAL THAT EXHIBITS BOTH WET WRINKLE RESISTANCE AND DRY WRINKLE RESISTANCE COMPRISING THE FOLLOWING STEPS CARRED OUT IN SEQUENCE: (A) TREATING A CELLULOSIC TEXTILE MATERIAL WITH AN AQUEOU SOLUTION CONTAINING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND GLUTARALDEHYDE AND A STRONG MINERAL ACID AS A CATALYST; (B) REMOVING UNREACTED ALDEHYDE AND ACID FROM THE ALDEHYDE AND ACID TREATED TREATED PRODUCT OF STEP (A); (C) DYEING THE PRODUCT OF STEP (B) WITH A COTTON DYE; (D) REMOVING UNREACTED DYE REAGENTS FROM THE DYED PRODUCT OF STEP (C); (E) IMPREGNATING THE PRODUCT OF STEP (D) WITH AN AQUEOUS SOLUTION CONTAINING FROM .05% TO 8.0% BY WEIGHT OF AN ACIDIC CATALYST TO A WET PICKUP OF ABOUT FROM 60% TO 150%, BASED ON THE ORIGINAL WEIGHT OF THE CELLULOSIC TEXTILE MATERIAL; (F) DRYING THE CATALYST IMPREGNATED PRODUCT OF STEP (E) AT A TEMPERATURE NOT EXCEEDING 60*C.; (G) BAKING THE DRIED PRODUCT OF STEP (F) AT A TEMPERATURE OF ABOT FROM 100*C. TO 180*C. FOR PERIODS OF FROM EIGHT MINUTES TO 30 SECONDS, THE SHORTER TIME INTERVALS BEING EMPLOYED WITH THE HIGHER TEMPERATURES; AND (H) REMOVING RESIDUAL ACIDIC CATALYST FROM THE DRIED AND BAKED PRODUCT OF STEP (G).