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    • 7. 发明授权
    • Polyisocyanate compositions and a process for the production of low-density flexible foams with low humid aged compression sets from these polyisocyanate compositions
    • 多异氰酸酯组合物和由这些多异氰酸酯组合物生产具有低湿老化压缩组合的低密度柔性泡沫的方法
    • US06376567B1
    • 2002-04-23
    • US09732069
    • 2000-12-07
    • Joachim WernerRonald Zibert
    • Joachim WernerRonald Zibert
    • C08G1810
    • C08G18/6688C08G18/10C08G18/4072C08G18/632C08G2101/0008C08G2101/0058C08G2101/0083C08G18/7664
    • This invention relates to novel polyisocyanate compositions, to a process for these polyisocyanate compositions, to a process for the production of cold cure flexible molded foams wherein this novel polyisocyanate composition comprises the polyisocyanate component, and to the cold cure flexible molded foams produced by this process. The novel polyisocyanate compositions of the present invention are characterized by an NCO group content of more than about 15%, (preferably from about 20% to less than about 33%, more preferably from about 25% to about 32%), and comprising: (1) from about 70 to 99% by weight of a polymethylene poly(phenyl isocyanate) having an NCO group content of from about 30 to about 33%, and a monomer content of from about 40% to about 90% by weight and (2) from about 1 to about 30% by weight of a prepolymer of diphenylmethane diisocyanate having an NCO group content of from about 2% to about 20%, and comprising the reaction product of: (a) diphenylmethane diisocyanate; and (b) a polyether polyol.
    • 本发明涉及新颖的多异氰酸酯组合物,涉及这些多异氰酸酯组合物的方法,用于生产冷固化柔性模塑泡沫的方法,其中该新型多异氰酸酯组合物包含多异氰酸酯组分,以及由该方法生产的冷固化柔性模制泡沫 。 本发明的新型多异氰酸酯组合物的特征在于NCO基团含量大于约15%(优选约20%至小于约33%,更优选约25%至约32%),并且包括: (1)约70至99重量%的NCO基团含量为约30至约33重量%的聚亚甲基聚(苯基异氰酸酯)和约40重量%至约90重量%的单体含量和( 2)约1至约30重量%的NCO基团含量为约2%至约20%的二苯基甲烷二异氰酸酯的预聚物,并且包含以下反应产物:(a)二苯基甲烷二异氰酸酯; 和(b)聚醚多元醇。