| 摘要 |
<p>A photochromic compound of general formula (Ia), wherein R<1> represents C1 to C20 alkyl or aralkyl; R<2> to R<5> each represents hydrogen, C1 to C6 alkyl, aryl, aralkyl, C1 to C5 alkoxy, halogeno, cyano, trichloromethyl, trifluoromethyl or nitro; R<6> and R<7> each represents hydrogen, C1-C6 alkyl, aryl, aralkyl, halogeno, cyano or nitro; and X represents oxygen or sulfur; a homopolymer of said compound; and a copolymer thereof with a vinylic compound of the general formula: CH2=CYZ, wherein Y represents H or CH3, and Z represents carboxyl, alkoxycarbonyl, cyano, carbamoyl, N,N-dimethylcarbamoyl, acetoxy, phenyl or methylphenyl.</p> |
