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    • 3. 发明授权
    • Polymer foams with inherent nonflammability and thermal stability and
methods of preparation thereof
    • 具有固有不燃性和热稳定性的聚合物泡沫及其制备方法
    • US5514726A
    • 1996-05-07
    • US945277
    • 1992-09-15
    • Gus NicholsC. D. Armeniades
    • Gus NicholsC. D. Armeniades
    • C08J9/02C08L79/04C08G77/00C08G77/56C08G79/00C08G79/08
    • C08J9/02C08L79/04C08J2379/04Y10S521/902Y10S521/907
    • Polymeric foams with novel chemical compositions are prepared by the condensation of specially-synthesized precursors, which contain (in addition to carbon and hydrogen) one or more of the following elements: oxygen, fluorine, nitrogen (in structures with stable chemical bonds), silicon, boron, phosphorus (in high oxidation states), and certain metals (and/or their oxides and hydroxides). Upon mixing in the proper proportions and/or heating these precursors react rapidly to generate polymeric networks, consisting of heterocyclic crosslink centers, connected with heterochain segments; hydrogen is largely eliminated or replaced by fluorine. These structures possess inherent nonflammability and high thermoxidative stability. Foaming is effected by the gaseous by-products of the condensation reactions, as well as by the addition of foaming agents. The resulting foam products can be formulated to have a wide range of densities and flexibilities.
    • 具有新化学组成的聚合物泡沫通过特殊合成的前体(除了碳和氢之外)一种或多种以下元素的缩合制备:氧,氟,氮(具有稳定化学键的结构),硅 ,硼,磷(高氧化态)和某些金属(和/或其氧化物和氢氧化物)。 在以适当比例混合和/或加热时,这些前体快速反应以产生由与杂链部分连接的杂环交联中心组成的聚合物网络; 氢被很大程度地消除或被氟代替。 这些结构具有固有的不可燃性和高的热氧稳定性。 发泡由缩合反应的气态副产物以及通过加入发泡剂来实现。 所得泡沫产品可配制成具有宽范围的密度和灵活性。