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    • 6. 发明授权
    • Foamable molding compositions
    • 可发泡成型组合物
    • US4851453A
    • 1989-07-25
    • US305826
    • 1989-02-02
    • Roger J. WhiteSivaram Krishnan
    • Roger J. WhiteSivaram Krishnan
    • C08J9/10
    • C08J9/104
    • A Chemical Blowing Agent (CBA) concentrate was developed comprising a modifying agent and a chemical blowing agent. The CBA is characterized in that its decomposition products contain a primary amine. The modifying agent is a blend of a maleic anhydride copolymer and a butadiene based rubber. It was surprisingly found that resin degradation which often accompanies foam moldings using a CBA of the present type and is expressed in terms of a reduction in the molecular weight of the resin, is much reduced upon the incorporation of the modifying agent and chemical blowing agent of the invention. The concentrate may optionally further comprise a polymeric resin component.
    • 开发了包含改性剂和化学发泡剂的化学发泡剂(CBA)浓缩物。 CBA的特征在于其分解产物含有伯胺。 改性剂是马来酸酐共聚物和丁二烯基橡胶的共混物。 令人惊奇地发现,通常伴随着使用本发明的CBA的泡沫塑料成型并且根据树脂的分子量的降低表示的树脂降解,在引入改性剂和化学发泡剂 本发明。 浓缩物可以任选地进一步包含聚合树脂组分。