Reactive polyurethane hot melt adhesive and preparation method thereof

The invention belongs to the technical field of adhesives, and particularly relates to a reactive polyurethane hot melt adhesive and a preparation method thereof. The high-temperature-resistant polyurethane elastomer is prepared from the following components in parts by weight: 25 to 30 parts of crystalline polyester polyol, 15 to 20 parts of a hydroxyl polyolefin polymer, 15 to 20 parts of hydroxyl-terminated liquid nitrile rubber, 15 to 20 parts of thermoplastic resin, 20 to 30 parts of isocyanate, 0.5 to 1.0 part of a coupling agent and 0.1 to 0.5 part of a catalyst. According to the invention, a polyolefin structure is introduced into the molecular structure of the reactive polyurethane hot melt adhesive, so that the adhesion of a system to a weak-polarity base material is improved, and the advantages of hydrolysis resistance and electrical property are particularly obvious. 本发明属于胶黏剂技术领域，具体涉及一种反应型聚氨酯热熔胶及其制备方法，反应型聚氨酯热熔胶，以重量份计包括如下组分：结晶型聚酯多元醇25-30份、羟基聚烯烃聚合物15-20份、端羟基液体丁腈橡胶15-20份、热塑性树脂15-20份、异氰酸酯20-30份、偶联剂0.5