| 摘要 |
PURPOSE:To obtain the subject molded products which is suitably used as a garment material or a medical material because it keeps a deformation at room temperature and restores to its original form when heated, by mixing an organic polyisocyanate with a specific polyol at a specific ratio and molding the mixture with heat. CONSTITUTION:(A) An organic polyisocyanate is mixed with (B) the polyol component containing (i) more than 80 equivalent % of a diol of formulas I, II and/or III [A1, A2 are 2 to 4C alkylene; A3 is group of formula IV or V (R1, R2 are H, 1 to 3C alkyl); (m), (n) are positive integer where 2<=(m)+(n)<=10; (o), (p) are 0, positive integer where 0<=(o)+(p)<=10, (q), (r) are 0, positive integer where 0<=(q)+(r)<=10; X is H, Cl], (ii) 0 to 20 equivalent % of a long-chain polyol of 50 to 8,000 average molecular weight and (iii) 0 to 20 equivalent % of a low molecular-weight polyol of less than 400 average molecular weight. The mixture is stirred and heat-molded to give the subject molded product of a polyurethane resin containing more than 15wt.% of the structural units of formulas VI, VII, and/or VIII. |
