混合多元醇对无溶剂聚氨酯覆膜胶性能的影响  

Effects of Mixed-polyols on Properties of Solvent-free Polyurethane Laminating Adhesives

作　　者：陈双莲[1] 陈广学[1] 陈奇峰[1] 贾春江[1] 王青[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广州510640

出　　处：《包装工程》2012年第7期40-43,77,共5页Packaging Engineering

摘　　要：以聚己二酸-1,4-丁二醇酯(PBA)、植物油多元醇、异弗尔酮二异氰酸酯(IPDI)和小分子多元醇为主要原料,制备了一种双组分无溶剂型聚氨酯胶粘剂。研究了双组分的配比R′和混合多元醇组分对聚氨酯胶粘剂固化速率、固化后胶膜的热稳定性和吸水率的影响,并测试了覆膜样品的T剥离强度。结果表明:当双组分配比R′=1.3时,胶粘剂综合性能最佳;添加小分子多元醇并不能提高胶粘剂的固化速率和耐热性,但能显著改善胶粘剂的粘结性能,并且选择性添加适量的小分子二醇,还能增强其耐水性。Two-component solvent-free polyurethane adhesive was prepared with PBA, vegetable oil polyols, IPDI and several different small molecular alcohols as main raw materials. The influences of two-components ratio Rr and mixed polyols components on curing speed, heat resistance, water absorption, and T-peel strength were studied. The results showed that the adhesives showed the best comprehensive properties when the twocomponents ratio R＇ is 1.3 ; addition of small molecular alcohols can not increase the curing speed and heat resistance, however, it can significantly improve the peel strength of the adhesive; adding appropriate amount of small molecules alcohols selectively can enhance its water resistance.

关 键 词：无溶剂 聚氨酯 植物油多元醇 小分子多元醇 覆膜胶 

分 类 号：TB484.3[一般工业技术—包装工程] TB487