Process of impregnating cellulosic material with thermosetting resin

Claim 1

THE METHOD OF PRODUCING A SHRINK-RESISTANT CELLULOSIC TEXTILE MATERIAL WHICH COMPRISES IMMERSING A CELLULOSIC TEXTILE MATERIAL IN FROM 10 TO 70 TIMES ITS WEIGHT OF AN AQUEOUS SOLUTION OF FROM ABOUT 0.2 TO 2% BY WEIGHT, BASED ON SAID MATERIAL, OF A CATIONIC SURFACE ACTIVE AGENT; ALLOWING SUBSTANTIALLY ALL OF SAID AGENT TO MIGRATE FROM SAID SOLUTION ONTO SAID MATERIAL, THE TEMPERATURE OF SAID SOLUTION BEING BETWEEN ABOUT 100 TO 200* F. DURING THIS STEP; IMMERSING SAID MATERIAL IN FROM 10 TO 70 TIMES ITS INITIAL WEIGHT OF AN AQUEOUS SOLUTION COMPRISING INITIALLY FROM ABOUT 3 TO 25% BY WEIGHT, BASED ON THE INITIAL WEIGHT OF THE MATERIAL, OF A SUBSTANTIALLY UNPOLYMERIZED CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE, ALKYLATED MELAMINE-FORMALDEHYDE AND ALKYLATED UREA-FORMALDEHYDE CONDENSATION PRODUCTS AND MIXTURES THEREOF, SAID LAST NAMED SOLUTION BEING SUBSTANTIALLY FREE OF CURING CATALYSTS FOR SAID CONDENSATION PRODUCT; ALLOWING SAID TEXTILE MATERIAL TO REMAIN IN CONTACT WITH THE SOLUTION OF SAID CONDENSATION PRODUCT FOR A PERIOD OF AT LEAST 60 MINUTES AND UNTIL SUBSTANTIALLY ALL OF THE CONDENSATION PRODUCT MIGRATES FROM SAID SOLUTION ONTO THE MATERIAL, THE TEMPERATURE OF THE LAST NAMED SOLUTION BEING BETWEEN ABOUT 115 AND 180* F. DURING THIS STEP; EXTRACTING SAID MATERIAL TO REMOVE EXCESS SOLUTION THEREFROM; AND THEN DRYING AND HEATING SAID MATERIAL TO INSOLUBILIZE SAID CONDENSATION PRODUCT.

Claim 2

THE METHOD OF PRODUCING A SHRINK-RESISTANT CELLULOSIC TEXTILE MATERIAL WHICH COMPRISES IMMERSING A CELLULOSIC TEXTILE MATERIAL IN FROM 10 TO 70 TIMES ITS WEIGHT OF AN AQUEOUS SOLUTION OF FROM ABOUT 0.2 TO 2% BY WEIGHT, BASED ON SAID MATERIAL, OF A CATIONIC SURFACE ACTIVE AGENT; ALLOWING SUBSTANTIALLY ALL OF SAID AGENT TO MIGRATE FROM SAID SOLUTION ONTO SAID MATERIAL, THE TEMPERATURE OF SAID SOLUTION BEING BETWEEN ABOUT 100 TO 200* F. DURING THIS STEP; IMMERSING SAID MATERIAL IN FROM 10 TO 70 TIMES ITS INITIAL WEIGHT OF AN AQUEOUS SOLUTION COMPRISING INITIALLY FROM ABOUT 3 TO 25% BY WEIGHT, BASED ON THE INITIAL WEIGHT OF THE MATERIAL, OF A SUBSTANTIALLY UNPOLYMERIZED CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE, ALKYLATED MELAMINE-FORMALDEHYDE AND ALKYLATED UREA-FORMALDEHYDE CONDENSATION PRODUCTS AND MIXTURES THEREOF, SAID LAST NAMED SOLUTION BEING SUBSTANTIALLY FREE OF CURING CATALYSTS FOR SAID CONDENSATION PRODUCT; ALLOWING SAID TEXTILE MATERIAL TO REMAIN IN CONTACT WITH THE SOLUTION OF SAID CONDENSATION PRODUCT FOR A PERIOD OF AT LEAST 60 MINUTES AND UNTIL SUBSTANTIALLY ALL OF THE CONDENSATION PRODUCT MIGRATES FROM SAID SOLUTION ONTO THE MATERIAL, THE TEMPERATURE OF THE LAST NAMED SOLUTION BEING BETWEEN ABOUT 115 AND 180* F. DURING THIS STEP; EXTRACTING SAID MATERIAL TO REMOVE EXCESS SOLUTION THEREFROM; AND THEN DRYING AND HEATING SAID MATERIAL TO INSOLUBILIZE SAID CONDENSATION PRODUCT.