Dicyandiamide formaldehyde condensation products and their production

Claim 1

A PROCESS FOR PREPARING A CLEAR STABLE SOLUTION OF A DICYANDIAMIDE UREA AND FORMALDEHYDE CONDENSATION PRODUCT, WHICH COMPRISES HEATING AT A REACTION TEMPERATURE AN AQUEOUS SOLUTION HAVING A PH OF ABOVE 7 OF DICYANDIAMIDE, UREA AND FORMALDEHYDE TO THE STAGE WHEREIN THE RESINOUS PRODUCT FROM THESE THREE INGREDIENTS IS WATER INSOLUBLE, THE PROPORTIONS OF THE REACTANTS BEING FROM ABOUT 0.3 TO ABOUT 5.5 MOLES OF UREA PER MOLE OF DICYANDIAMIDE, FROM ABOUT 0.5 TO ABOUT 1.5 MOLE OF FORMALDEHYDE PER MOLE OF DICYANDIAMIDE, AN D FROM ABOUT 0.5 TO ABOUT 1 MOLE OF FORMALDEHYDE PER MOLE OF UREA; ADDING TO THE SAID WATER-INSOLUBLE RESINOUS PRODUCT A WATERSOLUBLE ALKALI METAL SALT OF A SULFONIC ACID SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC SULFONIC ACIDS CONTAINING AT LEAST TEN CARBON ATOMS IN THE ALKYL GROUP THEREOF AND AROMATIC SULFONIC ACIDS TO FORM A CLEAR AQUEOUS SOLUTION THEREOF.