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    Polyurethanes cured with amines and their preparation
    1.
    发明申请
    Polyurethanes cured with amines and their preparation 失效
    用胺固化的聚氨酯及其制备方法

    公开(公告)号：US20090149621A1

    公开(公告)日：2009-06-11

    申请号：US12009873

    申请日：2008-01-23

    申请人： Jens Krause ,  James-Michael Barnes ,  Manfred Schmidt ,  Wieland Hovestadt

    发明人： Jens Krause ,  James-Michael Barnes ,  Manfred Schmidt ,  Wieland Hovestadt

    IPC分类号： C08G18/10 ,  C08G18/28

    CPC分类号： C08G18/4854 ,  C08G18/10 ,  C08G18/3814 ,  C08G18/4238 ,  C08G18/758 ,  C08G18/7671 ,  C08G2380/00

    摘要： Polyurethane prepolymers are described which are prepared from 2,4′-diiso-cyanate diphenylmethane (2,4′-MDI), a polyol component and an aliphatic diisocyanate. These prepolymers can be cured with aliphatic, cycloaliphatic and/or aromatic amines to form a cured urethane elastomer. In comparison to cured urethane elastomers based on monomeric 2,4′-MDI, these prepolymers provide elastomers with extended pour life, i.e. they exhibit a slower rate of viscosity buildup after curative and prepolymer are mixed which results in a reduced propensity to crack during the curing process and gives the opportunity to cast larger parts. In comparison to polyurea/urethanes prepared from cured TDI-prepolymers and which optionally include H12-MDI, the prepolymers of the invention have better health and safety aspects.

    摘要翻译： 描述了由2,4'-二异氰酸酯二苯基甲烷（2,4'-MDI），多元醇组分和脂族二异氰酸酯制备的聚氨酯预聚物。 这些预聚物可以用脂肪族，脂环族和/或芳族胺固化以形成固化的聚氨酯弹性体。 与基于单体2,4'-MDI的固化的聚氨酯弹性体相比，这些预聚物提供具有延长的浇注寿命的弹性体，即它们在固化剂和预聚物混合后表现出较慢的粘度增长速率，这导致在 固化过程，给予机会铸造更大的零件。 与由固化的TDI-预聚物制备并且任选地包括H12-MDI的聚脲/聚氨酯相比，本发明的预聚物具有更好的健康和安全性。

    Polyurethanes cured with amines and their preparation
    2.
    发明授权
    Polyurethanes cured with amines and their preparation 失效
    用胺固化的聚氨酯及其制备方法

    公开(公告)号：US08242229B2

    公开(公告)日：2012-08-14

    申请号：US12009873

    申请日：2008-01-23

    申请人： Jens Krause ,  James-Michael Barnes ,  Manfred Schmidt ,  Wieland Hovestadt

    发明人： Jens Krause ,  James-Michael Barnes ,  Manfred Schmidt ,  Wieland Hovestadt

    IPC分类号： C08G18/70

    CPC分类号： C08G18/4854 ,  C08G18/10 ,  C08G18/3814 ,  C08G18/4238 ,  C08G18/758 ,  C08G18/7671 ,  C08G2380/00

    摘要： Polyurethane prepolymers are described which are prepared from 2,4′-diiso-cyanate diphenylmethane (2,4′-MDI), a polyol component and an aliphatic diisocyanate. These prepolymers can be cured with aliphatic, cycloaliphatic and/or aromatic amines to form a cured urethane elastomer. In comparison to cured urethane elastomers based on monomeric 2,4′-MDI, these prepolymers provide elastomers with extended pour life, i.e. they exhibit a slower rate of viscosity buildup after curative and prepolymer are mixed which results in a reduced propensity to crack during the curing process and gives the opportunity to cast larger parts. In comparison to polyurea/urethanes prepared from cured TDI-prepolymers and which optionally include H12-MDI, the prepolymers of the invention have better health and safety aspects.

    摘要翻译： 描述了由2,4'-二异氰酸酯二苯基甲烷（2,4'-MDI），多元醇组分和脂族二异氰酸酯制备的聚氨酯预聚物。 这些预聚物可以用脂肪族，脂环族和/或芳族胺固化以形成固化的聚氨酯弹性体。 与基于单体2,4'-MDI的固化的聚氨酯弹性体相比，这些预聚物提供具有延长的浇注寿命的弹性体，即它们在固化剂和预聚物混合后表现出较慢的粘度增长速率，这导致在 固化过程，给予机会铸造更大的零件。 与由固化的TDI-预聚物制备并且任选地包括H12-MDI的聚脲/聚氨酯相比，本发明的预聚物具有更好的健康和安全性。