Abstract: A two-component, solvent-free, transparent, epoxy resin modified polyurethane adhesive is introduced in this paper. The mechanims of PU/EP synthesis was tracked by IR spectroscopy. The chemical reactions among groups and the change of products with time were analyzed. The result showed that several properties of modified products were greatly improved. Under the suitable raw material ratio and experiment condition, the viscosity, flow ability, stability, storage life, were satisfactory. When PU/EP curing agent was 5∶3, the skin drying time was 45min, the shearing intensity was more than 19MPa, the product was tough, solvent resistant and temperature resistant. During curing process no bubble was created, which was good for usein bonding and sealing.

摘要： 报道了一种无溶剂、双组分、透明环氧改性聚氨酯胶黏剂，利用红外光谱法跟踪探讨了合成机理，分析了各基团之间的化学反应及其产物随时间的变化。结果表明：改性后聚氨酯的许多性能得到改进；在最佳原料配比及适宜的实验条件下，产品黏度适中，流动性好，性能稳定，储存期长；在m（合成环氧改性聚氨酯）∶m（固化剂）=5∶3的条件下，室温表干时间约45 min，剪切强度大于19 MPa，产品为韧性，耐溶剂、耐温性优良，固化过程中不起泡，用于粘接及灌封时美观。