Modified urea-formaldehyde resins and methods of preparing the same

Claim 1

A RESINOUS COMPOSITION COMPRISING A UREAFORMALDEHYDE RESIN CHEMICALLY COMBINED UNDER HEAT WITH A WATER-SOLUBLE PRODUCT OF REACTION UNDER HEAT OF (1) DICYANDIAMIDE WITH (2) THE WATER-SOLUBLE PRODUCT OF REACTION, UNDER HEAT AND ACID CONDITIONS AND IN THE PRESENCE OF A LIQUID MEDIUM COMPRISING WATER, OF FORMALDEHYDE AND AN AMINE SELECTED FROM THE CLASS CONSISTING OF PRIMARY AROMATIC HYDROCARBON MONOAMINES AND SECONDARY HYDROCARBON MONOAMINES HAVING AT LEAST ONE ARYL RADICAL ATTACHED DIRECTLY TO THE AMINE NITROGEN ATOM, EACH ARYL RADICAL OF THE SAID PRIMARY AND SECONDARY MONOAMINES HAVING AT LEAST TWO OF ITS ORTHO AND PARA POSITIONS UNSUBSTITUTED, THE FORMALDEHYDE AND THE AMINE BEING EMPLOYED IN THE RATIO OF FROM ABOUT 0.5 TO ABOUT 1.5 MOLS OF FORMALDEHYDE PER MOL OF THE AMINE, AND THE DICYADIAMIDE OF (1) BEING EMPLOYED IN AN AMOUNT CORRESPONDING TO AT LEAST ABOUT 0.9 MOL THEREOF PER MOL OF THE AMINE USED IN FORMING THE REACTION PRODUCE OF (2).