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    • 4. 发明授权
    • Process for the production of microcellular moldings from diisocyanate
and compounds containing groups obtained by reacting amino groups with
carbon dioxide
    • 用于从二异氰酸酯生产微孔成型体的方法和含氨基与二氧化碳反应得到的化合物
    • US4499038A
    • 1985-02-12
    • US549040
    • 1983-11-07
    • Walter SchaferHans-Joachim MeinersKlaus SeelWolfgang ReichmannKuno WagnerKurt Findeisen
    • Walter SchaferHans-Joachim MeinersKlaus SeelWolfgang ReichmannKuno WagnerKurt Findeisen
    • C08G18/00B29B15/00B29C43/00B29C45/00C08G18/32C08G18/50C08G18/66C08G101/00C08J9/02C08G18/14
    • C08G18/5048C08G18/3265C08G18/503C08G18/667C08G2120/00
    • The present invention is directed to a process for the production of polyurea-based microcellular moldings comprising reacting(a) at least one diisocyanate or polyisocyanate containing only aromatically bound isocyanate groups,(b) at least one compound containing at least two isocyanate-reactive groups, and(c) optionally the auxiliaries and additives known in polyurethane chemistry, in closed molds, components (a)-(c) being processed as a one-shot system by reaction injection molding, characterized in that component (b) comprises at least one polyether compound (b1) optionally in admixture with other isocyanate-reactive compounds and containing at least 3 aliphatically bonded ether groups and n-aliphatically bonded isocyanate-reactive groups, n standing for an integer or, statistically a fraction of from 2-4(i) at least (100:n) % of the isocyanate-reactive groups present in component (b1) being aliphatically bonded primary and/or secondary amino groups,(ii) at least 10 equivalent % of said amino groups being present in the form of ammonium carbamate groups having a functionality of two in the isocyanate addition reaction, of the type obtained by reacting aliphatically bonded, primary or secondary amino groups with carbon dioxide,(iii) the unmodified compounds containing at least 3 ether groups having a molecular weight of from 200 to 10,000 and(iv) at least 0,2 equivalent % of all isocyanate-reactive groups of the total component (b) being ammonium carbamate groups.The present invention also relates to said compounds (b) optionally in admixture with the auxiliaries and additives known in polyurethane chemistry.
    • 本发明涉及一种制备聚脲基微孔成型体的方法,其包括使(a)至少一种仅含芳香结合的异氰酸酯基团的二异氰酸酯或多异氰酸酯,(b)至少一种含有至少两个异氰酸酯反应性基团的化合物 ,和(c)任选地在聚氨酯化学中已知的助剂和添加剂,在封闭模具中,组分(a) - (c)通过反应注射成型作为一步法处理,其特征在于组分(b)至少包含 一种聚醚化合物(b1)任选地与其它异氰酸酯反应性化合物混合并且含有至少3个脂族键合的醚基团和n-脂肪键合的异氰酸酯反应性基团,n代表整数,或统计学上为2-4 i)组分(b1)中存在的至少(100:n)%的异氰酸酯 - 反应性基团是脂族键合的伯和/或仲氨基,(ii)至少10当量 所述氨基的%以异氰酸酯加成反应中官能度为2的氨基甲酸铵基团的形式存在,其通过脂族键合,伯或仲氨基与二氧化碳反应而获得的类型,(iii)未修饰的化合物含有 至少3个分子量为200至10,000的醚基和(iv)总组分(b)的所有异氰酸酯反应性基团的至少0.2当量%为氨基甲酸铵基团。 本发明还涉及所述化合物(b),任选地与聚氨酯化学中已知的助剂和添加剂混合。