| 摘要 |
PURPOSE:To prepare a polyurethane foam excellent in the weathering properties by reacting a specific polyol compd. with a polyisocyanate. CONSTITUTION:A hydrogenated product of a liq., hydroxylated polyisoprene is used as a polyol compd. to react with a polyisocyanate (e.g. hexamethylene diisocyanate) to prepare a polyurethane foam. |
