| abstract |
To provide a method for producing a rigid polyurethane foam, whereby it is possible to obtain a rigid polyurethane foam which has a low density and good dimensional stability, and when a mixture of a polymer-dispersed polyol and a polyol for a rigid polyurethane foam to be used, is stored, the mixture is excellent in storage stability, so that a rigid polyurethane foam can be produced constantly. n A method for producing a rigid polyurethane foam, which comprises reacting a polyol component (Z) with a polyisocyanate component in the presence of a blowing agent, a surfactant and a catalyst, wherein the polyol component (Z) has an average hydroxyl value of from 200 is to 800 mgKOH/g and contains a polymer-dispersed polyol (A) having polymer particles dispersed in a polyol by polymerizing a monomer having a polymerizable unsaturated group in a polyol (X), wherein the polyol (X) contains a polyether polyol, and the monomer having a polymerizable unsaturated group contains a fluorinated acrylate or a fluorinated methacrylate, and styrene. |