Melamine resins modified with polyalkylene polyamine-halohydrin condensates

Claim 1

THE PROCESS OF PREPARING A WATER SOLUBLE RESINOUS COMPOSITION COMPRISING THE REACTION PRODUCT OF MELAMINE, FORMALDEHYDE AND A POLYFUNCTIONAL ALIPHATIC POLYAMINE CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF (1) AMMONIA AND A DIFUNCTIONAL HALOHYDRIN, (2) A POLYALKYLENE POLYAMINE AND A DIFUNCTIONAL HALOHYDRIN AND (3) A POLYALKYLENE POLYAMINE AND A DIHALOALKANE WHEREIN THE FORMALDEHYDE IS PRESENT IN A TOTAL AMOUNT OF AT LEAST 8 MOLES PER MOLE OF MELAMINE WHICH COMPRISES REACTING A PARTIALLY POLYMERIZED MELAMINE FORMALDEHYDE CONDENSATION PRODUCT HAVING A MELAMINE TO FORMALDEHYDE MOL RATIO OF FROM ABOUT 1:1.5 TO 1:5 RESPECTIVELY, WHICH HAS BEEN REACTED TO A POINT BEYOND THE METHYLOL STAGE, BUT SHORT OF THE GEL STAGE, AT A TEMPERATURE OF BETWEEN ABOUT 20* C. AND 100* C. WITH A POLYFUNTIONAL ALIPHATIC POLYAMINE CONDENSATION PRODUCT PROVIDING A CARBON TO NITROGEN RATIO NOT GREATER THAN 4:1 RESPECTIVELY, IN AN AMOUNT SUFFICIENT TO YIELD BETWEEN ABOUT 0:3 AND 10 ATOMS OF NITROGEN PER MOLE OF MELAMINE; INTRODUCING ADDITIONAL AMOUNTS OF FORMALDEHYDE UNTIL THERE IS PRESENT MOLE RATIO OF MELAMINE TO FORMALDEHYDE WITHIN THE RANGE OF 1:6 TO ABOUT 1:14 RESPECTIVELY, CONTINUING THE REACTION UNTIL A VISCOSITY OF ABOUT 20 CENTIPOISES AND 800 CENTIPOISES MEASURED AT 35% SOLIDS AND 25* C. IS OBTAINED; INHIBITING FURTHER REACTION BY SUBSTANTIALLY NEUTRALIZING THE REACTION PRODUCT, AND ADDING THERETO FORMALDEHYDE IN AN AMOUNT SUFFICIENT TO BRING THE MOLE RATION OF THE MELAMINE TO TOTAL FORMALDEHYDE CHARGED TO AT LEAST 1:8 RESPECTIVELY.