Urea formaldehyde condensation product

Claim 1

IN MAKING A RESIN THAT GIVES A STABLE COLLOIDAL SOLUTION IN WATER, THE PROCESS WHICH COMPRISES WARMING A MIXTURE OF ABOUT 1.4-1.9 MOLES OF FORMALDEHYDE WITH 1 MOLE OF UREA IN AQUEOUS SOLUTION AND AT A PH AT LEAST AS HIGH AS APPROXIMATELY 7, CONTINUING THE WARMING ONLY UNTIL CONDENSATION REACHES THE STAGE AT WHICH DIMETHYLOL UREA IS FORMED AND A SPECIMEN OF THE SOLUTION, ON COOLING, SHOWS A POSITIVE CLOUD TEST, THEN ADDING ADDITIONAL FORMALDEHYDE IN AMOUNT TO MAKE THE TOTAL FORMALDEHYDE INTRODUCED ABOUT 2,1-3 MOLES, ADDING AN ACID CATALYST OF UREA FORMALDEHYDE CONDENSATON IN ANY AMOUNT REQUIRED TO ESTABLISH THE PH APPROXIMATELY WITHIN THE RANGE 2.5-6, CONTINUING THE WARMING UNTIL THE PRODUCT, WHEN AN ALKALI IS ADDED TO A SAMPLE THEREOF IN AMOUNT TO ESTABLISH THE PH AT 7.3 AND THE SAMPLE DILUTED WITH WATER TO CONCENTRATION 2%-15% SOLIDS, GIVES A COLLOIDAL SOLUTION WITH A STRONG TYNDALL EFFECT, THEN DISCONTINUING THE WARMING AND ADDING AN ALKALI IN AMOUNT TO NEUTRALIZE ANY ACIDITY OF THE PRODUCT.