This invention describes an adhesive composition that forms the basis of a heat-resistant, fire resistant, and water resistant polyurethane adhesive suitable for applications in the manufacture of wood products, and the method of making the adhesive. The wood finger- jointed studs produced using an adhesive derived from this invention can meet or exceed the fire rating of a period of 60 minutes according to ASTM E 119 and ASTM D 7374. The heat resistance of the adhesive is a result of incorporating thermally stable aromatic polyol molecules into the polymeric structures of the wood adhesive system, which is composed of the reaction products of a poly(methylene diphenyl diisocyanate), at least one of a polyether polyol and a polyester polyol; and the aromatic polyol that is a hydroxyl phenol in a preferred embodiment. Furthermore, this novel wood adhesive system possesses high water-resistance, making it suitable for the manufacture of highly durable engineered wood products. It is fast moisture-curable at ambient temperatures. It is also formaldehyde-free.
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机译:本发明描述了一种粘合剂组合物及其制备方法,该粘合剂组合物构成了适用于木制品生产的耐热,耐火和耐水聚氨酯粘合剂的基础。使用源自本发明的粘合剂生产的指接木钉,可以达到或超过ASTM E 119和ASTM D 7374规定的60分钟耐火等级。粘合剂的耐热性是结合了热稳定性的结果芳族多元醇分子进入木材粘合剂体系的聚合物结构,该体系由聚(亚甲基二苯基二异氰酸酯),聚醚多元醇和聚酯多元醇中的至少一种的反应产物组成;在优选的实施方式中,为羟基苯酚的芳香族多元醇。此外,这种新型的木材胶粘剂系统具有很高的耐水性,使其适用于制造高度耐用的工程木制品。在环境温度下可快速湿固化。它还不含甲醛。
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