Patent ID: 11912813
Assignee: TOKUYAMA CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
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).