Thermosetting resins and high wet strength papers prepared therefrom

Claim 2

A WATER-SOLUBLE, PARTIALLY POLYMERIZED RESINOUS COCONDENSATION PRODUCT OF REACTANTS CONSISTING OF 1 MOL OF UREA, 2.0 TO 3.0 MOLS OF FORMALDEHYDE, 0.05 TO 0.3 MOL OF MELAMINE AND 0.1 TO 0.3 MOL OF AN ALKANOLAMINE, SAID CO-CONDENSATION PRODUCT BEING POLYMERIZED TO THE EXTENT THAT A 35% AQUEOUS SOLUTION THEREOF HAS A VISCOSITY OF AT LEAST 15 CENTIPOISES AT 25*C., THE ALKANOLAMINE INCLUDED IN THE CO-CONDENSATON PRODUCT CONFORMING TO THE FORMULA:

Claim 3

A PROCESS FOR PREPARING A WATERLAID PAPER SHEET OF HIGH WET TENSILE STRENGTH WHICH COMPRISES PREPARING A SUSPENSION OF 100 PARTS BY WEIGHT OF CELLULOSIC PAPERMAKING FIBERS IN WATER, ADDING TO SAID SUSPENSION 0.1 TO 5.0 PARTS BY WEIGHT OF A RESIN, PREPARING A WATERLAID SHEET FROM SAID SUSPENSION, AND DRYING SAID SHEET; SAID RESIN BEING A WATER-SOLUBLE, PARTIALLY POLYMRIZED RESINOUS CO-CONDENSATION PRODUCT OF REACTANTS CONSISTING OF 1 MOL OF UREA, 2.7 MOLS OF FORMALDEHYDE, 0.11 MOL OF MELAMINE AND 0.18 MOL OF TRIETHANOLAMINE, SAID CO-CONDENSATION PRODUCT BEING POLYMERIZED TO THE EXTENT THAT A 35% AQUEOUS SOLUTION THEREOF HAS A VISCOSITY OF AT LEAST 15 CENTIPOISES AT 25%C.

Claim 4

A PROCESS FOR PREPARING A WATERLAID PAPER SHEET OF HIGH WET TENSILE STRENGTH WHICH COMPRISES PREPARING A SUSPENSION OF 100 PARTS BY WEIGHT OF CELLULOSIC PAPERMAKING FIBERS IN WATER, ADDING TO SAID SUSPENSION 0.1 TO 5.0 PARTS BY WEIGHT OF A RESIN, PREPARING A WATERLAID SHEET FROM SAID SUSPENSION, AND DRYING SAID SHEET; SAID RESIN BEING A WATER-SOLUBLE, PARTIALLY POLYMRIZED RESINOUS CO-CONDENSATION PRODUCT OF REACTANTS CONSISTING OF 1 MOL OF UREA, 2.7 MOLS OF FORMALDEHYDE, 0.11 MOL OF MELAMINE AND 0.18 MOL OF TRIETHANOLAMINE, SAID CO-CONDENSATION PRODUCT BEING POLYMERIZED TO THE EXTENT THAT A 35% AQUEOUS SOLUTION THEREOF HAS A VISCOSITY OF AT LEAST 15 CENTIPOISES AT 25%C.