Epoxy modified urea-formaldehyde condensation product and method of making same

Claim 1

THE PROCESS OF MAKING A WATER SOLUBLE CATIONIC CONDENSATION PRODUCT WHICH COMPRISES MIXING (1) THE PARTIALLY CONDENSED WATER SOLUBLE VISCOUS CATIONIC MATERIAL, RESULTING FROM FORMING AN AQUEOUS SOLUTION OF 1/3-1 MOLE OF AN ALIPHATIC POLYHYDRIC ALCOHOL, 1 MOLE OF EPICHLOROHYDRIN AND AN ACID IN AMOUNT TO ACIDIFY THE SOLUTION, HEATING THE ACIDIFIED SOLUTION UNTIL THE RESULTING EXOTHERMIC REACTION BECOMES SLOW, THEN ADDING ABOUT 1 MOLE OF AN ALIPHATIC POLYAMINE AND CONTINUING THE HEATING UNTIL A PARTIALLY CONDENSED WATER SOLUBLE VISCOUS CATIONIC MATERIAL RESULTS, WITH (2) FORMALDEHYDE AND UREA IN THE PROPORTION OF 1.5-4 MOLES OF FORMALDEHYDE TO 1 MOLE OF UREA, THE PROPORTION OF THE SAID VISCOUS CATIONIC MATERIAL BEING ABOUT 1 PART BY WEIGHT TO 3 PARTS OF THE UREA, HEATING THE RESULTING MIXTURE AT A TEMPERATURE BETWEEN ABOUT 40* C. AND THE BOILING POINT OF THE SAID MIXTURE AND AT A PH OF 1.5-10, CONTINUING THE HEATING UNTIL THE RESULTING CONDENSATION PRODUCES A VISCOUS SOLUTION, THEN DISCONTINUING THE HEATING AND ADJUSTING THE PH TO 7-8.