| abstract |
An object of the present invention is to provide a flame-retardant polyurethane resin composition that is easy to handle, has excellent flame retardancy, and can form a foam that maintains a constant shape when heated. The flame-retardant polyurethane resin composition of the present invention is characterized by comprising a polyisocyanate compound, a polyol compound, a trimerization catalyst, a foaming agent, a foam stabilizer and an additive, wherein the trimerization catalyst is selected from nitrogen-containing aromatic compounds , at least one of carboxylate alkali metal salts, tertiary ammonium salts and quaternary ammonium salts, the additive uses red phosphorus as an essential component, in addition to the red phosphorus, a combination of phosphate esters, phosphate-containing flame retardants, At least one of a bromine-containing flame retardant, a boron-containing flame retardant, an antimony-containing flame retardant and a metal hydroxide. |