| 摘要 |
An asymmetric spiroorthocarbonate compound having one exomethylene group and represented by the following general formula (1) <IMAGE> wherein A represents a group selected from: <IMAGE> wherein R<1>, R<2>, R<3> and R<4> each represents a hydrogen atom, in alkyl group having not more than 8 carbon atoms, an alkoxy group, a halogen group, a nitro group, a cyano group, an amino group, an amide group, a hydroxyl group or an alkyl ester group having not more than 20 carbon atoms; and R<5>, R<6>, R<7> and R<8>, R<9> to T<1><4>, R<1><5> to R<2><2>, R<2><3> to R<2><8> and R<2><9> to R<3><6> each represents a hydrogen atom or an alkyl group having not more than 8 carbon atoms; and copolymers containing units therefrom.o |
