Composites of thermotropic polyurethane(TPUR) with rectorite and organic rectorite clays of different composition were prepared by melt processing．The organic rectorite(ORECA) was obtained in an ion-exchange reaction of rectorite with quaternary ammonium salt．The composites were characterized by using FTIR

WAXD

SEM and mechanical measurements．It was found that the door spacing of ORECA crystals increased and even disappeared

when they were mixed with TPUR．These results implied the intercalation phenomenon and the nanoscale disperison of ORECA in the composites．The tensile strength of TPUR composites with 2 parts of ORECA was about 42％ higher than that of the pure TPUR．With increasing the OPECA content the few strength of the composites increased noticeably．An increase 92.8 kN／m to 138.8 kN／m was observed when 8 parts of OBECA was added in the composites．