| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermosetting resin composition, which is excellent in extrusion moldability and mold releasing properties from a die, causes no deterioration in optical performance even in a high-temperature environment, and has excellent heat resistance, for optical materials. SOLUTION: The thermosetting resin composition for optical materials contains a specific bisphenol-formaldehyde resin (A) having a methylol group, and an epoxy resin (B) having two or more glycidyl groups in one molecule. A compounding ratio, as a mass ratio, of the bisphenol-formaldehyde resin (A) to the epoxy resin (B) is 70/30-30/70. COPYRIGHT: (C)2009,JPO&INPIT
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