The present invention is related to a structural member comprising a laminate and an adhesive where said adhesive is the reaction product of a) 100 parts by weight of at least one hydroxy functional material having a molecular weight of at least 300 and a hydroxy functionality of at least 2 which material is preferably selected from the group consisting of polyether polyols, polyester polyols, polyester amide polyols, and polycarbonate polyols, b) 2 to 20 parts by weight of an aliphatic, aromatic and/or cycloaliphatic diamine or triamine, and c) an organic isocyanate in an amount sufficient to render the isocyanate index between about 70 and about 150, wherein said component c) is not pre-reacted with any of the component a) and b). In a preferred embodiment, there is included upto 50 parts by weight of component d) which is an aliphatic polyol having a functionality of at least 2 and a molecular weight of below 300. The invention also relates to a process for bonding substrates especially laminates which comprises applying a reaction mixture forming said adhesive preferably with aid of a counter current mixing device forming non-sagging beads of said reaction mixture.
本发明涉及一种由层压板和粘合剂组成的结构件,其中所述粘合剂是 a) 100 份(重量)至少一种羟基官能团材料的反应产物,该材料的分子量至少为 300,羟基官能团至少为 2,该材料最好选自聚醚多元醇、聚酯多元醇、聚酯酰胺多元醇和聚
碳酸酯多元醇组成的组,b) 2 至 20 份(重量)脂肪族、芳香族和/或环脂肪族二胺或三胺的反应产物、b) 2 至 20 份(按重量计)脂肪族、芳香族和/或环脂肪族二胺或三胺,以及 c) 有机
异氰酸酯,其用量足以使
异氰酸酯指数介于约 70 和约 150 之间,其中所述组分 c) 不与任何组分 a) 和 b) 预反应。在一个优选的实施方案中,组分 d) 的重量不超过 50 份,它是一种脂肪族多元醇,官能度至少为 2,分子量低于 300。本发明还涉及一种粘合基材(尤其是层压板)的工艺,该工艺包括应用形成所述粘合剂 的反应混合物,该反应混合物最好借助逆流混合装置形成所述反应混合物的不下垂微珠。