To provide a resin cured product having a high surface hardness and exhibits high adhesion to a substrate and low warpage and high flexing resistance as a shaped article, and a key sheet having a layer composed of the resin cured product.
The resin cured product has a Martens hardness within the range from at least 30 N/mm2 to at most 170 N/mm2 as measured by a micro-indentation test and an elastic deformation rate of at most 60%. The key sheet has a layer composed of the resin cured product. Preferably in particular, the resin cured product is obtained by hardening, by cast polymerization, an active energy ray-curable resin composition that includes 100 pts.mass of the total of 25-75 pts.mass of a urethane (meth)acrylate (A) obtained by a reaction among a polyisocyanate (a1), a polyol (a2) and a hydroxyalkyl (meth)acrylate (a3) and 25-75 pts.mass of a cyclic structure-containing monofunctional monomer (B) whose homopolymer has a Tg of 100C or higher and an active energy ray-curable polymerization initiator (C).
HAYAMA YASUSHI
| JPH115809A | 1999-01-12 | |||
| JP2008088354A | 2008-04-17 | |||
| JP2006188589A | 2006-07-20 | |||
| JP2007119748A | 2007-05-17 | |||
| JP2004338214A | 2004-12-02 | |||
| JP2007314715A | 2007-12-06 | |||
| JPH115809A | 1999-01-12 | |||
| JP2008088354A | 2008-04-17 | |||
| JP2006188589A | 2006-07-20 | |||
| JP2007119748A | 2007-05-17 | |||
| JP2004338214A | 2004-12-02 |
Ishibashi Masayuki
Masaaki Ogata
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