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.

为合成新型热致晶聚脲，晶基的联（或联邻甲）、1，6-己、2，4-甲异氰酸酯为原料进行合成。