申请人:BASF WYANDOTTE CORPORATION
公开号:EP0045413A1
公开(公告)日:1982-02-10
The present invention is directed to flexible polyurethane foam compositions and methods of preparation thereof, characterized by improved heat degradation properties, which are prepared by the reaction of an organic polyisocyanate with a polyol in the presence of a small but effective amount of a lower alkanediol. It is preferred that the alkanediol have from 2 to about 5 carbon atoms. Lower alkanediols that may be employed include 1,2-ethanediol (ethylene glycol), the propanediols, the butanediols, most preferably, 1,4-butanediol, and the pentanediols. By incorporating the alkanediol, improved resistance to heat degradation is achieved. Further, it has been discovered in accordance with the present invention that, with the incorporation of the alkanediol, the addition of conventional flame retardants does not increase foam degradation but, in fact, the combination improves resistance to heat degradation.
本发明涉及软质聚氨酯泡沫组合物及其制备方法,其特点是改善了热降解性能,其制备方法是有机多异氰酸酯与多元醇在少量但有效的低级烷二醇存在下进行反应。烷二醇最好具有 2 至 5 个碳原子。可使用的低级烷二醇包括 1,2-乙二醇(乙二醇)、丙二醇、丁二醇(最好是 1,4-丁二醇)和戊二醇。通过加入烷二醇,可提高耐热降解性。此外,根据本发明还发现,加入烷二醇后,传统阻燃剂的添加不仅不会增加泡沫降解,反而会提高抗热降解性。