高固含量低黏度超耐水水乳型丙烯酸系压敏黏合剂的制备与性能  

Preparation and properties of waterborne acrylic pressure sensitive adhesive with high solid content,low viscosity and excellent water resistance

作　　者：夏宇正[1] 虞倩 石淑先[1] 黄传华[2] 李成[2] 李勇 石亮[2] 何歆 Xia Yuzheng;Yu Qianx;Shi Shuxian;Huang Chuanhua;Li Cheng;Li Yong;Shi Liang;He Xin(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Sichuan Jinlu Resin Co.,Ltd.,Deyang 618500,Sichuan,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]四川省金路树脂有限公司,四川德阳618500

出　　处：《中国胶粘剂》2021年第5期14-20,共7页China Adhesives

摘　　要：首先合成了一种丙烯酸酯共聚物的种子乳液,然后进行种子乳液聚合,严格控制压敏黏合剂乳液粒径,进而达到低黏度目的;其次采用耐水性能好的氯乙烯(VCM)作为附着力促进单体,因VCM具有更大的链转移常数,体系无需加入严重影响压敏黏合剂性能的烷基硫醇,从而实现了高固含量下水乳型丙烯酸压敏黏合剂共聚物的初始分子量,同时低分子量的可控可实现高固含量压敏胶乳液的低黏度化,进而提高涂布速度。最终得到的乳液型压敏黏合剂的初粘、持粘及180°剥离强度均超过现有封箱胶带用水乳型压敏黏合剂的水平,同时所得水乳型压敏黏合剂不仅在BOPP膜上具有优异的粘基力,在BOPET、PE乃至PVC膜上均具有很好的三力平衡统一。本研究在配方设计时还考虑了转移涂布的应用,因采用的交联单体具有适中的交联速度,即使采用转移涂布,胶层粘基力也非常优异。First,a kind of seed emulsion of acrylate copolymer was synthesized,and then seeded emulsion polymerization was used to strictly control the particle size of pressure sensitive adhesive emulsion so as to achieve the purpose of low viscosity.Secondly,vinyl chloride(VCM)with good water resistance was used as adhesion promoting monomer.Because of the larger chain transfer constant of VCM,the system did not need to add alkyl mercaptan which seriously affected the performance of pressure sensitive adhesive.Thus,the initial molecular weight of water-emulsion acrylic pressure sensitive adhesive copolymer with high solid content was achieved,at the same time,low molecular weight control could achieve low viscosity of pressure sensitive adhesive emulsion with high solid content and further improve the coating speed.The initial tack,holding strength and 180°peel strength of the emulsion-type pressure sensitive adhesive obtained finally were all higher than that of the existing wateremulsion pressure sensitive adhesive for sealing tape.Meanwhile the obtained water-emulsion pressure sensitive adhesive not only had excellent adhesion force on BOPP film,but also had good balance of three forces on BOPET,PE and even PVC film.In this study,the application of transfer coating was also considered in the formulation design,because the crosslinking monomer used had moderate crosslinking speed,even if transfer coating was used,the adhesive layer also had excellent adhesion.

关 键 词：水乳型压敏黏合剂 高固含量 低黏度 氯乙烯 超耐水 转移涂布 

分 类 号：TQ436.5[化学工程]