| 摘要 |
The present invention addresses the problem of providing a urethane composition with excellent heat resistance and with which very hard moldings can be obtained. The present invention provides: a urethane composition comprising a base resin (i), which contains a urethane prepolymer with isocyanate groups obtained by reacting a polyol (A) with a polyisocyanate (B), and a curing agent (ii), the urethane composition being characterized in that the polyol (A) comprises a polyether polyol (a1) obtained by polymerizing an aromatic compound (a1-1) having two or more active hydrogen atom-containing groups and an alkylene oxide (a1-2); and a polishing material characterized in being obtained by thermosetting of said urethane composition and then slicing. |
