Process for the production of moldings of polyurethane foams
    1.
    发明授权
    Process for the production of moldings of polyurethane foams 失效
    制造聚氨酯泡沫塑料的方法

    公开(公告)号:US5426124A

    公开(公告)日:1995-06-20

    申请号:US207316

    申请日:1994-03-07

    摘要: The present invention relates to a process for the production of polyurethane foam moldings having a compact surface skin and a density of at least 150 kg/m.sup.3 comprising foaming a polyurethane-forming starting mixture inside a mold. The starting mixture comprises organic blowing agents which correspond to one or both of the following general formulas:HOOC--R--COOH (I)wherein: R represents a CH.sub.2 group or a CH.dbd.CH group;and ##STR1## wherein: R.sup.1 and R.sup.2 independently of one another represent either a hydrogen atom or a C.sub.1-6 alkyl radical wherein the hydrogen atoms may be partly substituted by OH groups.

    摘要翻译: 本发明涉及一种生产具有紧凑表面皮肤和至少150kg / m 3的密度的聚氨酯泡沫塑料模制品的方法,包括在模具内发泡聚氨酯形成起始混合物。 起始混合物包含对应于以下通式之一或两者的有机发泡剂:HOOC-R-COOH(I)其中:R表示CH 2基团或CH = CH基团; 和(II)其中:R 1和R 2彼此独立地表示氢原子或C 1-6烷基,其中氢原子可以被OH基部分取代。

    Process for the preparation of polyurea-polyurethane elastomers
    4.
    发明授权
    Process for the preparation of polyurea-polyurethane elastomers 失效
    制备聚脲 - 聚氨酯弹性体的方法

    公开(公告)号:US5141967A

    公开(公告)日:1992-08-25

    申请号:US701945

    申请日:1991-05-17

    IPC分类号: C08G18/10 C08G18/76

    摘要: The present invention relates to a process for preparing polyurea-polyurethane elastomers comprising reacting in a closed mold, in accordance with the reaction injection molding technique at an isocyanate index of about 95 to about 110, an isocyanate prepolymer having an isocyanate content of about 5 wt. % to 10 wt. % and a molecular weight range of about 1000 to 4000 with a diamine chain extender having no isocyanate-reactive groups other than amino groups in the substantial absence of compounds having isocyanate-reactive groups other than amino groups. The present invention further relates to the polyureapolyurethane elastomers produced by the process of this invention.

    摘要翻译: 本发明涉及一种制备聚脲 - 聚氨酯弹性体的方法,其包括在封闭模具中根据异氰酸酯指数为约95至约110的反应注射成型技术,异氰酸酯含量为约5重量%的异氰酸酯预聚物 。 %〜10重量% %,分子量范围为约1000-4000,二胺扩链剂在不存在除氨基以外的异氰酸酯反应性基团的化合物的情况下,不具有氨基以外的异氰酸酯反应性基团。 本发明还涉及通过本发明的方法生产的聚脲聚氨酯弹性体。