| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a polyurethane resin and a polyurethane foam having high resin physical properties, little dependence of the resin physical properties on humidity, and particularly high heat resistance. SOLUTION: In the method of producing a foamed or non-foamed polyurethane resin by reacting and curing an active hydrogen component (A) and a polyisocyanate component (B) in the presence or absence of a foaming agent, (A) 1,2-alkylene oxide having 3 or more carbon atoms is added to a hydrogen compound, The terminal primary OH conversion rate is 40% or more, and the hydroxyl equivalent x And a polyether polyol (a) having a total degree of unsaturation y (meq / g) satisfying the relationship of the formula (1) and / or a modified product (a ′) thereof. y ≦ (1.9 × 10 −8 ) x 2 (1) |