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    • 6. 发明授权
    • Moisture-curing, NCO-reactive polyurethane hotmelt adhesive composition
    • 水分固化,NCO反应聚氨酯热熔胶组合物
    • US5190607A
    • 1993-03-02
    • US927444
    • 1992-08-10
    • Joachim WernerWalter MeckelHorst StepanskiJose Colinas-Martinez
    • Joachim WernerWalter MeckelHorst StepanskiJose Colinas-Martinez
    • B32B17/10C08G18/12C08G18/40C08G18/42C08G18/72C08G18/76
    • C08G18/7607B32B17/1077C08G18/12C08G18/4018C08G18/4202C08G18/721C08G2170/20
    • The invention relates to a moisture-curing, NCO-reactive polyurethane hotmelt adhesive composition to a process for its production and to its use as an adhesive wherein the hot-melt adhesive characterized by a reaction product obtainable by reaction of:A) a mixture of:i) polyfunctional polyol component which is liquid or highly viscous (paste-like) at room temperature (25.degree. C.) and which has an average molecular weight of 500 to 5,000 and which is consisting of at least one polyether and/or polyester polycol, andii) a polyfunctional polyol component which is crystalline at room temperature (25.degree. C.) and which has a molecular weight of 500 to 10,000 and preferably 2,000 to 5,000with a mixture ofB)i) a polyisocyanate component containing two differently reactive NCO groups andii) a diisocyanate component having an NCO reactivity to hydroxyl groups which is greater which is greater than that of the less reactive NCO groups of the polyisocyanate component containing two differently reactive NCO groups.the overall ratio of NCO:OH groups being greater than 1, and the ratio of the NCO groups of the polyisocyanate component containing two differently reactive NCO groups to the OH groups of the polyol component i) being between 1.05 and 2.0 and the ratio by weight formed from the quantity of polyol component to the quantity of the polyisocyanate component containing two differenty reactive NCO groups and the quantity of the crystalline polyol component, the diisocyanate component containing isocyanate groups which are more reactive to OH groups than the less reactive NCO groups of the isocyanate containing two differently reactive NCO groups being between 10 and 0.1.
    • 本发明涉及一种湿固化性NCO反应性聚氨酯热熔粘合剂组合物,用于其生产和用作粘合剂的方法,其中该热熔粘合剂的特征在于可通过以下反应获得的反应产物:A) :i)在室温(25℃)下为液体或高粘度(糊状)的多官能多元醇组分,其平均分子量为500至5,000,并且由至少一种聚醚和/或聚酯 多醇,和ii)在室温(25℃)下为结晶的多官能多元醇组分,其分子量为500至10,000,优选为2,000至5,000,混合物为B)i)含有两种不同的多异氰酸酯组分 反应性NCO基团和ii)具有NCO与羟基反应性的二异氰酸酯组分,其大于大于含有两个不同的多异氰酸酯组分的较低反应性NCO基团 反应性NCO基团。 NCO:OH基团的总比例大于1,并且含有两个不同反应性NCO基团的多异氰酸酯组分与多元醇组分i)的OH基团的NCO基团的比例在1.05和2.0之间,重量比 由多元醇组分的量与含有两个不同的反应性NCO基团的多异氰酸酯组分的量和结晶多元醇组分的量相比,含有与OH基反应性更高的OH基团的异氰酸酯基团的二异氰酸酯组分相比, 含有两个不同反应性NCO基团的异氰酸酯在10和0.1之间。