| 摘要 |
<p>PURPOSE:The composition providing a cured material having improved thermal shock resistance, comprising an epoxy resin, a novolak phenolic resin, a phenol aralkyl resin and finely divided polyester elastomer powder in a specific ratio. CONSTITUTION:The aimed composition comprising (A) 100pts.wt. epoxy resin (e.g., bisphenol A type epoxy resin, etc.,) containing at least two epoxy groups in one molecule (e.g., bisphenol A type epoxy resin, etc.), (B) 10-50pts.wt. novolak type phenolic resin (preferably having 80-100 deg.C softening point and 100-110 hydroxyl group equivalent), (C) 10-50pts.wt. phenolic aralkyl resin (resin having 85-105 deg.C softening point and 195-235 hydroxy group equivalent) in the total amounts of the component B+C of 50-90pts.wt. and (D) 2-40pts.wt. polyester elastomer powder (having 140-220 deg.C melting point) having <=250mum particle diameter.</p> |
