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    EPOXY ADHESIVE HAVING IMPROVED LOW-TEMPERATURE IMPACT RESISTANCE
    1.
    发明申请
    EPOXY ADHESIVE HAVING IMPROVED LOW-TEMPERATURE IMPACT RESISTANCE 审中-公开
    环氧胶粘剂具有改善的低温抗冲击性

    公开(公告)号：WO2018081032A1

    公开(公告)日：2018-05-03

    申请号：PCT/US2017/057951

    申请日：2017-10-24

    申请人： DOW GLOBAL TECHNOLOGIES LLC

    发明人： AUVIL, Tyler ,  JIALANELLA, Gary L. ,  KRISHNAN, Bindu ,  KOCH, Felix ,  COLE, Eric E.

    IPC分类号： C09D163/00 ,  C08G59/14 ,  C08G59/40

    CPC分类号： C09D163/00 ,  C08G59/1444 ,  C08G59/1477 ,  C08G59/4021 ,  C08L75/04

    摘要： A one component epoxy adhesive composition is comprised of, an epoxy resin; a polyurethane based toughener, an epoxy curing agent, and an epoxy capped prepolymer comprised of the reaction product of a polyepoxide and an alkanolamine in which the amine is a primary amine. The epoxy capped prepolymer may be made by mixing and reacting an alkanolamine with a polyepoxide at a stoichiometric excess of the polyepoxide to alkanolamine, wherein said stoichiometric excess has a ratio of epoxides/amino groups is at least 2 to 1 such that the amino groups react whilst the hydroxyls present in the alkanolamine do not. The adhesive composition may give improved impact peel strength while not substantially reducing the elastic modulus. The adhesive may be used to bond metal components in automobile frames and the like.

    摘要翻译： 单组分环氧粘合剂组合物由环氧树脂组成; 基于聚氨酯的增韧剂，环氧固化剂和由聚环氧化物和链烷醇胺的反应产物组成的环氧封端的预聚物，其中胺为伯胺。 环氧封端的预聚物可以通过使链烷醇胺与聚环氧化物以化学计量过量的聚环氧化物与链烷醇胺混合并使其反应来制备，其中所述化学计量过量的环氧化物/氨基比率为至少2比1，使得氨基反应 而存在于链烷醇胺中的羟基则不存在。 该粘合剂组合物可以提供改进的冲击剥离强度，而基本不降低弹性模量。 粘合剂可用于粘合汽车车架等中的金属部件。

    ADHESIVE COMPOSITION
    2.
    发明申请
    ADHESIVE COMPOSITION 审中-公开

    公开(公告)号：WO2019079026A1

    公开(公告)日：2019-04-25

    申请号：PCT/US2018/053867

    申请日：2018-10-02

    申请人： DOW GLOBAL TECHNOLOGIES LLC

    发明人： AUVIL, Tyler ,  JIALANFLLA, Gary, L. ,  COLE, Eric, E. ,  KOCH, Felix ,  LUTZ, Andreas ,  SCHNEIDER, Daniel

    IPC分类号： C09J163/00 ,  C08G59/40

    CPC分类号： C09J163/00 ,  C08G59/245 ,  C08G59/4021 ,  C08K2003/2206 ,  C08L63/00 ,  C08K3/22 ,  C08K3/36 ,  C08K7/28 ,  C08L75/08

    摘要： An epoxy-based crash durable adhesive composition including: (I) a liquid resin system comprising: (a) at least one epoxy resin; and (b) at least one toughener; wherein the viscosity of the above liquid resin system is less than about 800 Pa s at a temperature of 15°C; and wherein the viscosity of the above liquid resin system is greater than about 5 Pa- s at a temperature of 60 °C; (II) a solid material comprising: (c) at least one hydrophobic fumed silica, wherein the fumed silica is present in the adhesive composition at a concentration of greater than 5 weight percent; and (III) a curative material comprising: (d) at least one latent heat-activated curing agent; wherein the rheology of the epoxy-based crash durable adhesive composition is such that the adhesive composition is pumpable at a temperature of 15 °C or greater; and wherein the epoxy-based crash durable adhesive composition exhibits an increase in wash-off resistance; a process for making the above adhesive composition; and a process for bonding metal substrates together with the above adhesive composition