The method of preparing a polyurethane curing agent based tdi-tmp

The present invention relates to a polyurethane curing agent, in particular to a method for preparing a polyurethane curing agent based on TDI-TMP, comprising the steps of: dehydrating the mixed components A and B, at a temperature of 130 degrees under the conditions: Step 1 0.5-1.5 hours, and then incubated 60-80 degrees, to obtain X-mixture; step 2: component C was added to the mixture obtained in step 1 X, and then reacted at a temperature of 60-80 degrees 1.5-3 hours; step 3: components the resulting mixture was added 2 step D, stirred, temperature controlled at 50-60 °, the reaction time is controlled to 2-5 hours, to obtain the finished product. The preparation method for the conventional method toxic preparing a polyurethane curing agent solvent detrimental disadvantages, using carbonate-based solvent, non-toxic, non-polluting, low cost.