利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

3 条记录 (耗时 0.017 秒)

    Process for the production of foam moldings having an impervious outer skin using semi-prepolymer prepared from isocyanates such as isophorone diisocyanate
    1.
    发明授权
    Process for the production of foam moldings having an impervious outer skin using semi-prepolymer prepared from isocyanates such as isophorone diisocyanate 失效
    使用由异氰酸酯如异佛尔酮二异氰酸酯制备的半预聚物生产具有不透水外皮的泡沫塑料制品的方法

    公开(公告)号：US4189542A

    公开(公告)日：1980-02-19

    申请号：US930303

    申请日：1978-08-02

    申请人： Helmut Kleimann ,  Holger Meyborg ,  Hans-Jurgen Lienert ,  Gerhard Grogler

    发明人： Helmut Kleimann ,  Holger Meyborg ,  Hans-Jurgen Lienert ,  Gerhard Grogler

    IPC分类号： C08J9/02 ,  C08G18/10 ,  C08G18/75 ,  C08G18/80 ,  C08G18/14

    CPC分类号： C08G18/8058 ,  C08G18/10 ,  C08G18/75 ,  C08G18/8032

    摘要： The instant invention is directed to a process for the production of weather-resistant rigid molded foams based on polyurethanes having a dimensional stability under heat according to DIN 53 432 of at least 70.degree. C. and a compact surface, a cellular core and an integral density distribution throughout the cross-section of the moldings, comprising foaming a foamable reaction mixture of polyisocyanates, polyhydroxyl compounds, blowing agents and, optionally, other isocyanate-reactive compounds, activators and other auxiliaries in a closed mold under the conditions of in-mold foaming, the improvement wherein the polyisocyanates used are reaction products containing isocyanate groups and urethane groups, said reaction products formed by reacting diisocyanates containing at least one cycloaliphatically bound isocyanate group and no more than one aliphatically bound isocyanate group with sub-stoichiometric quantities of organic polyhydroxyl compounds.

    摘要翻译： 本发明涉及一种用于生产基于聚氨酯的耐候刚性模塑泡沫的方法，所述聚氨酯在根据DIN 53 432的加热条件下具有至少70℃的尺寸稳定性，以及紧凑的表面，多孔芯和积分 包括在模制品的整个横截面处的密度分布，包括在模内的条件下，在封闭模具中发泡多异氰酸酯，多羟基化合物，发泡剂和任选的其它异氰酸酯反应性化合物，活化剂和其它助剂的可发泡反应混合物 发泡，其中使用的多异氰酸酯是含有异氰酸酯基团和氨基甲酸酯基团的反应产物的改进，所述反应产物是通过使含有至少一个环脂族连接的异氰酸酯基团的二异氰酸酯和不超过一个脂族结合的异氰酸酯基团与亚化学计量的有机多羟基 化合物。