Two series of thermotropic liquid crystalline polyureas were synthesized by the copolymerization of benzidine (or o-tolidine),1,6-hexane diamine and 2,4-toluene diisocyanate.

为合热致液晶聚脲，以含液晶基的联苯（或联邻甲苯）、1，6-、2，4-甲苯异氰酸酯为原料进行合。