CPC C08G 18/10 (2013.01) [B24B 37/24 (2013.01); C08G 18/64 (2013.01); C08G 83/007 (2013.01); C08K 7/22 (2013.01); C08L 75/04 (2013.01); C08L 87/005 (2013.01)] | 13 Claims |
1. A urethane resin obtained by reacting a polymerizable composition comprising at least
a urethane prepolymer (B2) having an iso(thio)cyanate group at an end of a molecule thereof, which is obtained by reacting a bifunctional active hydrogen-containing compound (C1) having two groups having active hydrogen in a molecule thereof and a bifunctional iso(thio)cyanate group-containing compound (B1) having two iso(thio)cyanate groups in a molecule thereof,
a polyrotaxane (A) having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, in which side chains having a group having active hydrogen are introduced into at least a part of the cyclic molecules, and
a polyfunctional active hydrogen-containing compound (C2) other than the polyrotaxane (A) and having three or more groups having active hydrogen in a molecule thereof,
wherein the polymerizable composition contains
50 to 2,000 parts by mass of the urethane prepolymer (B2), and
2 to 200 parts by mass of the polyfunctional active hydrogen-containing compound (C2),
based on 100 parts by mass of the polyrotaxane (A).
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