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    • 3. 发明申请
    • Method for the production of polymer foams based on reactive polycondensation resins
    • 基于活性缩聚树脂生产聚合物泡沫的方法
    • US20070197744A1
    • 2007-08-23
    • US10593419
    • 2005-03-17
    • Volker SchadlerDaniel SchmidtAxel Weiss
    • Volker SchadlerDaniel SchmidtAxel Weiss
    • C08F2/00
    • C08J9/28C08J2201/0504C08J2361/00
    • Process for producing polymer foams derived from reactive polycondensation resins and having a maximum pore diameter of 1 μm, which comprises: 1) preparing a gelable mixture of the reactive polycondensation resin in a solvent or dispersion medium, 2) preparing an aqueous dispersion comprising polymer particles, 3) mixing the mixture from step 1) with the dispersion from step 2) to give a water-containing gel, and 4) drying the water-containing gel to give the polymer foam, with drying in step 4) being carried out at a pressure and a temperature which are below the critical pressure and below the critical temperature of the liquid phase of the gel and the gel not being brought into contact with an organic liquid to replace the water present in the gel by this liquid after step 3) and before step 4).
    • 用于生产由反应性缩聚树脂衍生的并具有最大孔径为1μm的聚合物泡沫的方法,其包括:1)在溶剂或分散介质中制备反应性缩聚树脂的可凝胶混合物,2)制备包含聚合物颗粒 ,3)将来自步骤1)的混合物与来自步骤2)的分散体混合,得到含水凝胶,4)干燥含水凝胶得到聚合物泡沫体,在步骤4)中干燥,在 压力和温度低于临界压力并且低于凝胶的液相的临界温度,并且凝胶不与有机液体接触以在步骤3之后用该液体代替凝胶中存在的水) 并在步骤4之前)。