| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyurethane resin excellent in moisture permeability using a plant-derived polymeric diol. SOLUTION: The moisture-permeable polyurethane resin includes the plant-derived polymeric diol component, a polymeric diol containing oxyethylene groups, an organic diisocyanate component and a chain-extending component comprising a dihydric alcohol, wherein that the plant-derived polymeric diol component accounts for 25-65 wt.% of the resin components; the polymeric diol containing oxyethylene groups is a copolymer wherein the oxyethylene groups are randomly dispersed; an NCO/OH reaction equivalent ratio of a prepolymer of the organic diisocyanate component and the polymer diol is adjusted to≥3/4 (≥0.75); the resin includes the plant-derived polymeric diol component having a structure in which soft segments are centralized, the polymeric diol component containing oxyethylene groups, the organic diisocyanate component, and the chain-extending component comprising the dihydric alcohol; and the content of the plant-derived polymeric diol component is 25-65 wt.% in the resin component. COPYRIGHT: (C)2009,JPO&INPIT |
