| abstract |
The invention discloses a high initial tack strength moisture-curing polyurethane hot-melt adhesive and a preparation method thereof, which are composed of the following raw materials in parts by weight: 20-50 parts of polyether polyol, 10-40 parts of crystalline polyester polyol, and liquid polymer 5-30 parts of ester polyol, 10-20 parts of polyisocyanate, 10-35 parts of thermoplastic acrylic resin, 2-15 parts of tackifier resin, 0.1-0.5 part of catalyst and 0.1-1 part of antioxidant. The moisture-curing polyurethane hot-melt adhesive proposed by the present invention has the advantages of long open time, high initial tack strength, fast curing speed, high final tack strength, good damp heat resistance, high and low temperature impact resistance, and can achieve no pressure holding , to achieve efficient production of electronic products. |