Alkylation of dicyandiamide and formaldehyde resins

Claim 1

IN MAKING A WATER SOLUBLE RESIN THAT IS STABLE IN AQUEOUS SOLUTION, THE METHOD WHICH COMPRISES CONTACTING DICYANDIAMIDE IN AQUEOUS SOLUTION WITH FORMALDEHYDE FOR 1 MOL OF THE DICYANDIAMIDE, ADDING AN ALKALINE MATERIAL IN AMOUNT TO ESTABLISH THE PH AT A LEVEL ABOVE 7, MAINTAINING CONTACT OF THE DICYANDIAMIDE, FORMALDEHYDE AND SAID MATERIAL AT AN ELEVATED TEMPERATURE UNTIL THE CONDENSATION OCCURS AND THE RESULTING PRODUCT PASSES THROUGH A WATER PRECIPITABLE STATE TO THE WATER NON-PRECIPITABLE STAGE, INTRODUCING AN UNSUBSTITUTED ALIPHATIC ALCOHOL CONTAINING 1-3 CARBON ATOMS TO THE MOLECULE, INTRODUCING AN ACIDIC MATERIAL AFTER THE SAID NON-PRECIPITABLE STAGE HAS BEEN REACHED AND IN AMOUNT TO LOWER THE PH TO A LEVEL BELOW 7, AND MAINTAINING THE RESULTING MIXTURE AT A ELEVATED TEMPERATURE, CAUSING ETHERIFICATION, UNTIL SUBSTANTIALLY NO MORE ETHERIFICATION RESULTS.