| 摘要 |
PROBLEM TO BE SOLVED: To produce a polyurethane foam having a small residual strain under compression. SOLUTION: The method for producing the polyurethane resin is to react a polyol (A) with an organic polyisocyanate(B) in the presence of a catalyst and, if needed, a foaming agent. (A) comprises a polyetherpolyol (A1) having 200-3,000 OH equivalence,≤30 mass% oxyethylene unit content,≤2 ppm formaldehyde content and≤3 ppm acetaldehyde content. COPYRIGHT: (C)2005,JPO&NCIPI |
