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.
柔性弹性阻燃和膨胀聚氨酯泡沫由反应混合物制备而成,该反应混合物包括聚酯多元醇、有机多异氰酸酯、发泡剂、表面活性剂、催化剂、三聚氰胺衍生物和阻燃剂;三聚氰胺衍生物的一个或多个氢原子被甲醇和低级烷氧基甲基取代,阻燃剂的用量为 20-60 重量份/100 重量份聚酯多元醇,反应混合物中还包括水合氧化铝。 在一个优选的实施方案中,水合氧化铝预先分散在由三聚氰胺衍生物、阻燃剂和低粘度线性聚酯多元醇组成的混合物中。