Sulfonated urea-thiourea formaldehyde resins

Claim 1

A PROCESS FOR PREPARING A HYDROPHILIC POTENTIALLY THERMOSETTING RESINOUS PRODUCT WHIUCH COMPRISES REACTING AT A TEMPERATURE ABOVE 40*C. AND AT A PH OF BETWEEN 7 AND 9 RELATIVE PROPORTIONS OF 1 MOLE OF UREA WITH BETWEEN 2.0 AND 6.5 MOLES OF AN ALIPHATIC ALDEHYDE IN THE PRESENCE OF FROM BETWEEN 0.01 AND 0.040 MOLE OF BISULFITE PER MOLE OF ALDEHYDE; POLYMERIZING SAID REACTION PRODUCT AT A PH OF BETWEEN 2.2 AND 3.8 AND AT A TEMPERATURE ABOVE 40*C., ADJUSTING THE PH OF THE REACTION MIXTURE TO BETWEEN 7 AND 9, REACTING FROM BETWEEN 0.3 AND 2.5 MOLES OF THIOUREA WITH SAID REACTION MIXTURE, ADJUSTING THE PH OF SAID REACTION MIXTURE TO BETWEEN 3.5 AND 5.5, AND ALKYLATING THE REACTION PRODUCT WITH FROM 0.3-4 MOLES OF A SATURATED MONOHYDRIC ALIPHATIC ALCOHOL CONTAINING 1-3 CARBON ATOMS, AND THEREAFTER ADJUSTING THE PH TO THE ALKALINE SIDE, WHEREBY A HYDROPHILIC STABLE RESINOUS PRODUCT IS FORMED, SAID STABLE PRODUCT BEING DEFINED AS ONE WHICH DOES NOT SHED DOWN FLOC WHEN MAINTAINED FOR TWO WEEKS AT 25*C. AND WHICH DOES NOT HYDROPHOBE WHEN DILUTED WITH 50 TIMES ITS VOLUME OF WATER AT 25*C.