Patent ID: 8193133

Claim:
A method for preparing polyurea compounds by reacting amines and isocyanates in the presence of a liquid diluent in a high-pressure impingement mixing device under conditions sufficient to produce a polyurea compound having the consistency of a powder and in which ckluent is dispersed, wherein the amities and isocvanates are fed to the impingement device in a mole ratio of about 1:1 to about 2:1, at a temperature in the range of about O ° C. to about 100° C. and a pressure above about 500 psig through reactor orifices having an orifice of from about 0.030 to about 0.150 inches, wherein the reactor orifice of the amine and liquid diluent feed islarger than that for the isocyanate feed and is at least 0.109 inches in diameter.