COMPOSITION FOR POLYURETHANE

PROBLEM TO BE SOLVED: To obtain the subject low-viscosity composition having tough physical properties of a cured product and excellent in operating efficiency by including a polyol prepared by reacting a hydroxy-fatty acid with a monoepoxy compound therein. SOLUTION: This composition is obtained by including (A) a polyol prepared by reacting (i) a hydroxy-fatty acid with (ii) a monoepoxy compound, (B) polyisocyanates and, as necessary, (C) a urethanization promoting catalyst, a foaming agent, a surfactant, a plasticizer, etc. An 18-22C hydroxy-fatty acid having 1-3 hydroxyl groups and 1-3 COOH groups can be used as the component (i) and, e.g. a castor oil fatty acid can be used. Compounds represented by formulae I to III [R and R are each a 1-100C hydrocarbon (having O, N or S); R to R are each H, a 1-100C hydrocarbon, an alkylene or the like] are preferred as the component (ii) and, e.g. phenyl glycidyl ether is preferred.