| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermosetting resin composition which gives cured products excellent in heat resistance, electric characteristics, mechanical physical properties, and dimensional stability, and is excellent in storage stability before curing. <P>SOLUTION: This thermosetting polyurethane resin composition comprises a polyurethane resin having a structure represented by formula (1) and/or formula (2), an epoxy resin, and a curing agent, wherein the curing agent is a triazine-modified novolak type phenolic resin which comprises a mixture of a condensation product (c1) of a phenol compound, a triazine compound and an aldehyde compound, a condensation product (c2) of a triazine compound with an aldehyde compound, a condensation product of a phenol compound with an aldehyde compound, a phenol compound, and a triazine compound, regulated so that two kinds of specific structure units may be contained in a specific molar ratio in the condensation product (c1) and the condensation product (c2). <P>COPYRIGHT: (C)2009,JPO&INPIT |
