US 11,912,813 B2
Urethane resin using polyrotaxane, and pad for polishing
Yasutomo Shimizu, Tsukuba (JP); Takayoshi Kawasaki, Tsukuba (JP); and Mitsuki Tochi, Urayasu (JP)
Assigned to TOKUYAMA CORPORATION, Shunan (JP)
Appl. No. 17/045,553
Filed by TOKUYAMA CORPORATION, Shunan (JP)
PCT Filed Apr. 8, 2019, PCT No. PCT/JP2019/015355
§ 371(c)(1), (2) Date Oct. 6, 2020,
PCT Pub. No. WO2019/198675, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 2018-075749 (JP), filed on Apr. 10, 2018; and application No. 2018-230419 (JP), filed on Dec. 7, 2018.
Prior Publication US 2021/0155736 A1, May 27, 2021
Int. Cl. C08G 18/10 (2006.01); C08K 7/22 (2006.01); C08L 87/00 (2006.01); B24B 37/24 (2012.01); C08G 18/64 (2006.01); C08G 83/00 (2006.01); C08L 75/04 (2006.01)
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
OG exemplary drawing
 
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).