abstract |
PROBLEM TO BE SOLVED: To provide a flame-retardant urethane resin composition which is easy to handle, excellent in flame retardancy, and capable of forming a foam which maintains a constant shape when heated. A polyisocyanate compound, a polyol compound, a trimerization catalyst, a foaming agent, a foam stabilizer and an additive, The trimerization catalyst is at least one selected from the group consisting of nitrogen-containing aromatic compounds, carboxylic acid alkali metal salts, tertiary ammonium salts and quaternary ammonium salts, The additive is a group consisting of red phosphorus as an essential component, a phosphate ester other than the red phosphorus, a phosphate-containing flame retardant, a bromine-containing flame retardant, a boron-containing flame retardant, an antimony-containing flame retardant and a metal hydroxide. A flame-retardant urethane resin composition comprising a combination of at least one selected from the following. [Selection diagram] None |