Molded polyurea articles and a process for the production thereof
    2.
    发明授权
    Molded polyurea articles and a process for the production thereof 失效
    模制聚脲制品及其生产方法

    公开(公告)号:US4746681A

    公开(公告)日:1988-05-24

    申请号:US36834

    申请日:1987-04-10

    摘要: Molded polyurea foam parts having densities of from 200 to 600 kg/m.sup.3 and a compact skin are made by reacting a polyisocyanate component with a polyamine component in a closed mold at an isocyanate index of from 70 to 130. The polyamine component generally includes (1) an aminopolyether having a molecular weight of from 1800 to 12,000 and 2 to 3 isocyanate reactive groups of which at least 90% are aromatically bound primary and/or secondary amino groups, (2) an aromatic diamine, (3) a foaming agent and optionally (4) known auxiliaries and additives. The polyisocyanate component includes any aromatic di- and/or poly-isocyanate. Parts produced by this process have excellent mechanical properties and a well-defined solid skin.

    摘要翻译: 通过使多异氰酸酯组分与多胺组分在封闭模具中以70至130的异氰酸酯指数反应制备密度为200至600kg / m 3的模制聚脲泡沫部件和紧密表皮。多胺组分通常包括(1 )分子量为1800〜12,000的氨基聚醚和2〜3个异氰酸酯反应性基团,其中至少90%是芳族结合的伯和/或仲氨基,(2)芳族二胺,(3)发泡剂和 (4)已知的助剂和添加剂。 多异氰酸酯组分包括任何芳族二 - 和/或多异氰酸酯。 通过该方法生产的部件具有优异的机械性能和明确的固体皮肤。