| 摘要 |
PURPOSE:To provide a spectacles frame which has excellent transparency and excellent weatherability to a coloring dye and obviates generation of shape collapsion by mixing a thermosetting epoxy resin which is a chief material, acid anhydride hardener and polyester polyol flexibility imparting agent and subjecting the mixture to cast molding. CONSTITUTION:The liquid resin material obtd. by mixing the chief material consisting of the epoxy resin which is the diglycidyl ether of bisphenol A type expressed by the formula I, the hardener selected from the cyclic aliphat. acid anhydrides expressed by the formula II and the flexibility imparting agent selected by a combination of 1 or >=2 kinds from the polyester polyols expressed by the formula III is subjected to the cast molding. In the formula III, R1, R2, R3 denote an akyl chain of >=1C, R', R'', R''', R<4>' denote hydrogen or alkyl chain of >=1C, n denotes >=0 integer, n' denotes 0-4 integer. The frame having the excellent transparency and weatherability and particularly the weatherability to the coloring dye is thereby obtd.
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