| abstract |
An organic polyarylate containing a repeating unit represented by the formula; <IMAGE> wherein X is at least one member selected from the group consisting of -O-, -S-, -SO2-, -CO-, alkylene, alkenylene and following formulas; <IMAGE> and R1, R2, R3, R4, R5, R6, and R7 respectively show a hydrogen atom, a halogen atom or a C1-C10 alkyl group; said polyarylates having an inherent viscosity of at least 0.2 dl/g measured at 25 DEG C. in a solution of 1 g of the polarylate in 100 ml of a mixture of 50% by weight of phenol and 50% by weight of 1,1,2,2-tetrachloroethane. |