偏光片用可光扩散黏着层的制备和性能研究  

Preparation and performance of photo-diffusible adhesive layer for polarizer

作　　者：乔立根 巫柯 白永平 Qiao Ligen;Wu Ke;Bai Yongping(Guangzhou Lushan New Materials Co.,Ltd.,Guangzhou 510530,Guangdong,China;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China)

机构地区：[1]广州鹿山新材料股份有限公司,广东广州510530 [2]哈尔滨工业大学化工与化学学院,黑龙江哈尔滨150001

出　　处：《中国胶粘剂》2025年第2期24-29,共6页China Adhesives

摘　　要：采用β-丙烯酰氧基丙酸(β-CEA)作为官能单体、异丁烯酸甲酯(MMA)作为硬单体、丙烯酸-2-乙基己酯(2-EHA)作为软单体,使用HDI三聚体为交联剂、γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)为偶联剂,通过自由基溶剂聚合的方法合成了偏光片用可光扩散黏着层基体树脂,并探究了软硬单体比例、官能单体添加量对性能的影响。与交联剂、偶联剂复配得到了性能优异的黏着层,并在偏光片用黏着层基础上通过与光扩散微粒复配得到了性能优异的光扩散黏着层。分别探究了交联剂、偶联剂添加量对黏着层性能和10 rad/s条件下储能模量、耐候性的影响。研究结果表明:(1)当软硬单体比例为83∶17,官能单体添加量为3%时,偏光片用可光扩散黏着层基体树脂成膜后初粘力可达到6#球,剥离强度为21.7 N/in,持粘时间为9.0 h,10 rad/s条件下的储能模量为85395 Pa。(2)作为黏着层时,交联剂质量分数在0.45%,偶联剂质量分数在0.45%时为宜。(3)在制备光扩散黏着层时,选择光扩散微粒添加量4%较为合适。(4)结合影响性能和模量、雾度等各项因素,制备了一款性能优异、满足使用条件的偏光片用可光扩散黏着层。其初粘力可达2#球,180°剥离强度为4.1 N/in,85℃持粘时间为66 h,10 rad/s条件下的储能模量为140930 Pa,雾度为35%,60℃及90%RH环境下经时500 h无不良。Using β-acryloyloxypropionic acid(β-CEA)as the functional monomer,methyl methacrylate (MMA) as the hard monomer,2-ethylhexyl acrylate(2-EHA)as the soft monomer,HDI trimer as the crosslinking agent,and γ- methacryloyloxypropyltrimethoxysilane(KH-570) as the coupling agent,the photo-diffusible adhesive matrix resin for polarizer was synthesized by free-radical solvent polymerization.The effects of the ratio of soft and hard monomers and the amount of functional monomer added on the performance were investigated.The high-performance adhesive layer was obtained by compounding with crosslinking agents and coupling agents,and the high-performance photo-diffusible adhesive layer was obtained by compounding with photo-diffusible particles on the basis of the adhesive layer for polarizer.The effects of crosslinking agent and coupling agent addition on the performance of adhesive layer,as well as the storage modulus under 10 rad/s condition and weather resistance were investigated,respectively.The research results showed that,(1)When the ratio of soft and hard monomers was 83∶17 and the amount of functional monomer added was 3%,after the photo-diffusible adhesive layer substrate resin was formed into film,the initial tack could reach 6#ball,the peel strength was 21.7 N/in,the holding time was 9.0 h,and the storage modulus under 10 rad/s condition was 85395 Pa.(2)When used as the adhesive layer,it was advisable to have the crosslinking agent mass fraction of 0.45%and the coupling agent mass fraction of 0.45%.(3)When preparing the photo-diffusible adhesive layer,it was advisable to choose the photo-diffusible particle addition amount of 4%.(4)A photo-diffusible adhesive layer for polarizer with excellent performance and meeting usage conditions was prepared by combining various factors that affected performance,modulus,and haze.Its initial tack could reach 2#ball,180°peel strength was 4.1 N/in,the holding time at 85℃was 66 h,the storage modulus under 10 rad/s condition was 140930 Pa,the haze was 35%,and there were no

关 键 词：偏光片 可光扩散黏着层 聚丙烯酸酯 

分 类 号：TQ430.4[化学工程]