| 摘要 |
<p>PCT No. PCT/JP82/00345 Sec. 371 Date Apr. 21, 1983 Sec. 102(e) Date Apr. 21, 1983 PCT Filed Aug. 28, 1982 PCT Pub. No. WO83/00873 PCT Pub. Date Mar. 17, 1983.A photochromic photosensitive composition contains a benzothiazolinospiropyran compound represented by the general formula: <IMAGE> wherein R1 represents an alkyl group containing 1 to 10 carbon atoms, R2 represents an alkyl group containing 1 to 10 carbon atoms or a phenyl group, R3 represents a hydrogen atom, a halogen atom, a methoxy group or an alkyl group containing 1 to 5 carbon atoms, and R4 represents a hydrogen atom, an alkyl group containing 1 to 5 carbon atoms, a methoxy group or a methylthio group, dissolved or dispersed in a bisphenol A type polyether resin for enhancing thermal stability of the compound in a colored state. Addition of a phenol to the composition serves to further enhance the heat stability. As compared with conventional photochromic compositions, this photochromic photosensitive composition is thermally extremely stable in a colored state, and the developed color image can be stored for an enough long time to be suited for long-time recording.</p> |
