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.

为合成新型晶聚脲，以含晶基的联二（或联邻）、1，6-己二、2，4-二异氰酸酯为原料进行合成。