| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyurethane resin composition that has a moderately short cure time, hardly causes foaming phenomenon under high temperature and high humidity conditions during curing and has high hardness and excellent mechanical properties after it is cured. <P>SOLUTION: In a polyurethane resin composition prepared by mixing an isocyanate (I) and a curing agent (II) including (II-1) a specific bisphenol-based polyol and a castor oil-based polyol (II-2), the isocyanate group content of the isocyanate (I) is 6.0-50.0 mass%; the curing agent (II) further includes a bis(N-alkylaminocyclohexyl)methane (II-3); and the curing agent (II) contains 20-50 mass% bisphenol-based polyol (II-1), 10-30 mass% castor oil-based polyol (II-2) and a 20-70 mass% bis(N-alkylaminocyclohexyl)methane (II-3). <P>COPYRIGHT: (C)2012,JPO&INPIT |
