Intumescent flexible polyurethane foam and process of manufacture thereof
申请人:G.F.C. FOAM CORPORATION
公开号:EP0050908A2
公开(公告)日:1982-05-05
Flexible resilient flame-retardant and intumescent polyurethane foam is prepared from a reaction mixture comprising a polyester polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a melamine derivative and a flame-retardant; the melamine derivative has one or more hydrogen atoms replaced by a methylol andlor lower alkoxymethyl group, the amount of flame-retardant is 20-60 parts by weight/100 parts by weight of the polyester polyol and hydrated alumina is also included in the reaction mixture. In a preferred embodiment, the hydrated alumina is predispersed in a mixture comprising the melamine derivative, the flame retardant and a low-viscosity linear polyester polyol.