申请人:Freeman Chemical Corporation
公开号:EP0104736A2
公开(公告)日:1984-04-04
Low smoke isocyanurate modified polyurethane foams are prepared from polyols and a stoichiometric excess of reactive isocyanates providing an -NCO/-OH index of 1.3-3.0, preferably from 1.6-2.3. Catalysts for the trimerisation reaction of the isocyanate to the isocyanurate form are employed. The polyol used in the present invention includes from 5-100% of a digestion product which is prepared by digesting polyalkylene terephthalate residues in organic polyols. The foams produced by the method of the present invention posses unexpected properties in such areas as flame spread, smoke, and low friability. The use of the polyols described above can substantially reduce product cost, allowing the isocyanurate modified polyurethane foams of the present invention to be utilised in commercial applications.
低烟异氰尿酸酯改性聚氨酯泡沫由多元醇和反应性异氰尿酸酯按比例过量制备而成,其-NCO/-OH 指数为 1.3-3.0,最好为 1.6-2.3。使用催化剂使异氰酸酯发生三聚反应,生成异氰尿酸酯。本发明中使用的多元醇包括 5-100%的消化产物,该消化产物是通过消化有机多元醇中的聚对苯二甲酸乙二醇酯残留物制备的。用本发明的方法生产的泡沫在火焰蔓延、烟雾和低易碎性等方面具有意想不到的特性。使用上述多元醇可大大降低产品成本,从而使本发明的异氰尿酸酯改性聚氨酯泡沫可用于商业应用。