中国胶粘剂

以聚酯多元醇、二羟甲基丙酸、二苯基甲烷二异氰酸酯和季戊四醇三丙烯酸酯(PETA)等为原材料,加入引发剂进行自由基聚合制备了水性聚氨酯丙烯酸酯乳液(PUA)。对该乳液进行了性能表征,并着重研究了PETA对乳液性能以及在层压复合包材上应用性能的影响。研究结果表明:当w(PETA)=2%(相对于PUA乳液总质量而言)时,PUA乳液的稳定性较好,PUA胶膜的拉伸强度达到13 MPa,胶膜吸水率为7.4%,铝箔基的剥离强度为14.3 N/(25 mm)。各项数据表明该PUA乳液满足在层压复合中的应用要求。

Waterborne polyurethane acrylate emulsion(PUA)was prepared by free radical polymerization with polyester polyol, dimethylol propionic acid, diphenylmethane diisocyanate and pentaerythritol triacrylate(PETA)as raw materials and adding initiator. The properties of emulsion were characterized,and the effect of PETA on the performance of emulsion and its application on laminated composite packaging material were emphatically studied. The research results showed that when w(PETA)=2%(relative to the total mass of PUA emulsion),the stability of PUA emulsion was good,the tensile strength of PUA film reached 13 MPa,the water absorption rate of the film was 7.4%,and the peel strength of aluminum foil base was 14.3 N/(25 mm). The data indicated that the PUA emulsion met the application requirements in laminated composite.