Abstract: Moisture-curable polyurethane hot-melt adhesives for auto-lamps were synthesized from polyol and diphenyl methane-4,4′-diisocyanate (MDI). The viscosity，viscosity stability and green strength of the adhesive were studied. The peel strength was 980 N/25 mm and thermal resistance was 180 ℃ when the crystalline polyester content was 10% and the thermoplastic polyester content was 15%. The hotmelt adhesive is satisfied with the requirements of auto-lamps sealing and assembling.

摘要： 以多元醇、二苯基甲烷4,4′-二异氰酸酯（MDI）为原料，合成了湿固化反应型聚氨酯热熔胶黏剂用于汽车车灯粘接，研究了胶黏剂的黏度、黏度稳定性和初黏力等性能。结果表明，当高结晶性聚酯和热塑性聚酯用量在10%和15%时，胶黏剂剥离强度达到980 N/25 mm，耐热性达到180 ℃，满足了汽车灯具密封与装配的要求。