| abstract |
PROBLEM TO BE SOLVED: To provide a polyurethane elastomer excellent in compression set and abrasion resistance. A polyurethane elastomer containing a diol (A), an isocyanate compound (B), and a polyrotaxane (C) as constituent components, Further containing a polyol (D) having three or more hydroxyl groups as a constituent, A polyurethane elastomer having a compression set of 30% or less and an abrasion amount of 30 mg or less. [Selection diagram] None |