铝塑复合用聚氨酯胶粘剂的制备及性能研究

以聚酯、聚醚混合多元醇和异佛尔酮二异氰酸酯为主要原料,制备了一种低粘度无溶剂型聚氨酯覆膜胶粘剂。研究了聚酯、聚醚混合多元醇的配比对胶粘剂合成时间、粘度、抗水性能和粘结强度的影响;同时,探讨了催化剂的添加对胶粘剂综合性能的影响。结果表明:由混合聚酯、聚醚多元醇合成的聚氨酯胶粘剂粘度低、易涂覆且耐水性得以改善,但比例必须适宜,以2种多元醇所含羟基物质的量比为0.3:0.7为佳;催化剂的加入虽能显著提高固化速度,但降低了胶粘剂的剥离强度,不利于胶粘剂综合性能的改善,故应酌情适量添加。

Preparation and Performance Study of Aluminum Composite Polyurethane Adhesive

A low-viscosity and solvent-free polyurethane adhesive was prepared with mix of polyester and polyether polyols,and IPDI as main raw material.The influences of polyester to polyether ratio on reaction time,viscosity,and water resistance as well as adhesive strength were studied.The influences of catalysts’ addition on over-all properties of the adhesive were discussed.The results showed that polyurethane adhesives compounded by mixing of polyester and polyether polyols has low viscosity and is easy to smear;OH mole ratio must be well controlled,and the best ratio is 0.3/0.7;addition of catalysts raises the curing speed and reduces the peel strength,which means catalysts is not in favor of the comprehensive performance of adhesives.Thus,the circumstances should be taken into consideration when adding catalysts.