Urea and thiourea resinous composition

Claim 1

A PROCESS FOR PREPARING A STABLE, HYDROPHILIC, PARTIALLY POLYMERIZED, POTENTIALLY THERMOSETTING, RESINOUS PRODUCT, COMPRISING A PARTIALLY ALKYLATED DIMETHYLOL UREA AND A PARTIALLY METHYLOLATED THIOUREA AND FREE THIOUREA, WHICH COMPRISES METHYLOLATING BY REACTING IN AN AQUEOUS MEDIUM RELATIVE PROPORTIONS OF ONE MOLE OF UREA WITH FROM BETWEEN 1.50 AND 2.35 MOLES OF FORMALDEHYDE AT A PH OF BETWEEN 7 TO 10. AND AT A TEMPERATURE OF BETWEEN ABOUT 70 AND ABOUT 100*C. FOR FROM 0.25 TO 2.0 HOURS ADJUSTING THE PH OF THE REACTION MIXTURE TO FROM BETWEEN 4 AND 6, ALKYLATING THE UREA-FORMALDEHYDE CONDENSATE BY REACTING IT WITH FROM BETWEEN ABOUT 0.3 AND 2.0 MOLES OF A SATURATED ALIPHATIC MONOHYDRIC ALCOHOL CONTAINING FROM 1 TO 3 CARBON ATOMS AT A TEMPERATURE OF FROM BETWEEN 70 TO 100*C. FOR FROM BETWEEN 0.25 AND 2.0 HOURS, ADJUSTIN THE PH OF THE REACTION MIXTURE TO A VALUE FROM BETWEEN 7.0 AND 9.0 AND ADDING THERETO FROM BETWEEN 0.18 AND 0.75 MOLE OF THIOUREA, REACTING SAID THIOUREA WITH FROM BETWEEN 0.03 TO 0.35 MOLE OF AVAILABLE FROMALDEHYDE AT A TEMPERATURE OF FROM BETWEEN 50 AND 100*C. FOR FROM 1 TO 30 MINUTES TO PRODUCE A STABLE RESINOUS PRODUCT, SAID STABLE RESINOUS PRODUCT BEING ONE WHICH DOES NOT BECOME TURBID WHEN MAINTAINED FOR FOUR WEEKS AT 25*C. AND WHICH DOES NOT HYDROPHOBE WHEN DILUTED WITH THREE TIMES ITS VOLUME OF WATER AT 20*C.