| 摘要 |
PURPOSE:To obtain the subject composition comprising a specific epoxy resin, a curing agent and a curing accelerator, excellent in transparency, moisture resistance, thermal cycle resistance, and prevented in the deterioration of light transmittance in the near IR light region. CONSTITUTION:This composition comprises (A) an epoxy resin containing an epoxy resin of the formula (R is H or methyl), e.g. 3,3',5,5'-tetramethylbiphenol diglycidylether, in an amount of 10-40wt.% based on the whole amount of the resin, (B) a curing agent such as a multibasic carboxylic acid anhydride, and (C) a curing accelerator such as trimethylamine. |
