Stabilized polyoxyalkylene polyether polyols and polyurethane foams prepared therefrom
申请人:ATLANTIC RICHFIELD COMPANY
公开号:EP0122989A1
公开(公告)日:1984-10-31
Polyoxyalkylene polyether polyols are stabilized against oxidative degradation by incorporating therein a synergistic stabilizing composition containing (1) a mixture of butylated phenols consisting of 2-tertiary butyl phenol, 3,5-ditertiary butyl-4-hydroxyhydrocinnamate and 1,6-hexamethylene bis (3,5-ditertiary-butyl-4-hydroxyhydrocinnamate) or tetrakis [methylene(3,5-ditertiary butyl-4-hydroxyhydrocinna mate)] methane (2) a p,p'-dialkyldiphenylamine such as p,p'- dioctyldiphenylamine and (3) a phenothiazine compound. Polyurethane foams are stabilized against scorching when the stabilized polyols are utilized in the foam preparation or the stabilizing composition is added with other reactants.
通过在聚氧亚烷基聚醚多元醇中加入一种协同稳定组合物,可稳定聚氧亚烷基聚醚多元醇不发生氧化降解,该组合物包含:(1) 丁基化苯酚混合物,由 2-叔丁基苯酚、3,5-二叔丁基-4-羟基氢肉桂酸酯和 1、(1) 由 2-叔丁基苯酚、3,5-二叔丁基-4-羟基肉桂酸丁酯和 1,6-六亚甲基双(3,5-二叔丁基-4-羟基氢肉桂酸丁酯)或四[亚甲基(3,5-二叔丁基-4-羟基肉桂酸丁酯)]甲烷组成的丁基化苯酚混合物 (2) 对,对'-二烷基二苯胺,如对,对'-二辛基二苯胺 (3) 吩噻嗪化合物。当在泡沫制备过程中使用稳定多元醇或将稳定组合物与其他反应物一起添加时,聚 氨酯泡沫可防止烧焦。