Light/moisture dual-curing reactive polyurethane hot melt adhesive and preparation method thereof

The invention discloses a light/moisture dual-curing reactive polyurethane hot melt adhesive and a preparation method thereof. The reactive polyurethane hot melt adhesive is prepared from the following raw materials in parts by weight: 20 to 60 parts of liquid polyester polyol, 10 to 30 parts of polyether polyol, 0.3 to 4 parts of dihydroxyl diacrylate, 0.002 to 0.1 part of polymerization inhibitor, 10 to 45 parts of isocyanate, 0.5 to 3 parts of adhesion promoter, 0.5 to 6 parts of hydroxyl triacrylate, 1 to 5 parts of photoinitiator and 0.01 to 0.2 part of catalyst. The light/moisture dual-curing PUR prepared by the invention has the characteristics of low melting viscosity, high initial bonding strength, long opening time, high temperature and humidity resistance, excellent comprehensive performance and the like. 本发明公开了一种光/湿双重固化反应型聚氨酯热熔胶及其制备方法。该反应型聚氨酯热熔胶由以下重量份的原料制备而成：液体聚酯多元醇20～60份，聚醚多元醇10～30份，双羟基二丙烯酸酯0.3～4份，阻聚剂0.002-0.1份，异氰酸酯10～45份，粘合促进剂0.5～3份，羟基三丙烯酸酯0.5～6份，光引发剂1～5份，催化剂0.01～0.2份。本发明制得的光/湿双重固化PUR具有熔融黏度低、初始粘