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    • 2. 发明公开
    • Linear HDI urethane prepolymers for RIM application
    • Lineare HDI-UrethanprepolymerefürReaktionsspritzgussverfahren
    • EP0690085A2
    • 1996-01-03
    • EP95109197.4
    • 1995-06-14
    • Bayer Corporation
    • Steppan, David D.Nodelman, Neil H.Sanns, Frank, Jr.Cageao, Ronald A.Slack, William E.
    • C08G18/73C08G18/66
    • C08G18/8016C08G18/161C08G18/6511C08G18/6535C08G18/6688C08G18/73C08G2120/00
    • The present invention is directed to polyurethane moldings produced via the RIM process. These polyurethane moldings have excellent reactivity, demold properties (at a 30s demold), and good elongation and tear strength, and comprise the reaction product of an HDI prepolymer having an NCO content of 5 to 25%, a functionality of less than 2.3, and a monomer content of less than 10%, with an isocyanate-reactive component comprising b1) at least one relatively high molecular weight organic compound containing at least about two isocyanate-reactive hydroxyl groups; b2) at least one relatively low molecular weight organic compound selected from the group consisting of diols, aminoalcohols, and mixtures thereof; and b3) at least one relatively low molecular weight hydroxyl-based crosslinking compound containing no more than one aliphatic amine hydrogen atoms capable of reacting with isocyanate groups; in the presence of at least one catalyst.
    • 本发明涉及通过RIM工艺生产的聚氨酯模制品。 这些聚氨酯模制品具有优异的反应性,脱模性能(30秒脱模)和良好的伸长率和撕裂强度,并且包含NCO含量为5至25%,官能度小于2.3的HDI预聚物的反应产物,以及 单体含量小于10%,异氰酸酯反应性组分包含b1)至少一种含有至少约两个异氰酸酯反应性羟基的相对高分子量的有机化合物; b2)至少一种相对低分子量的有机化合物,其选自二醇,氨基醇及其混合物; 和b3)至少一种相对低分子量的羟基基交联化合物,其含有不超过一个能够与异氰酸酯基反应的脂族胺氢原子; 在至少一种催化剂的存在下进行。