硅烷偶联剂改性核壳丙烯酸酯乳液的合成  

Synthesis of silane coupling agents modified core-shell acrylate emulsions

作　　者：丁帅帅 程相林[1] 亓子怡 王小平 DING Shuaishuai;CHENG Xianglin;QI Ziyi;WANG Xiaoping(School of Chemical Engineering of Zhengzhou University,Zhengzhou 450001,Henan,China;Nantong Comens New Materials Co.,Ltd.,Nantong 226407,Jiangsu,China;Beijing Comens New Materials Co.,Ltd.,Beijing 102502,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]南通高盟新材料有限公司,江苏南通226407 [3]北京高盟新材料股份有限公司,北京102502

出　　处：《精细化工》2024年第7期1615-1624,共10页Fine Chemicals

摘　　要：为了解决传统丙烯酸乳液“热黏冷脆”的问题,以甲基丙烯酸甲酯(MMA)、苯乙烯(St)和丙烯酸丁酯(BA)为主单体,硅烷偶联剂为改性单体,制备了软核硬壳粒子的核壳结构丙烯酸酯乳液。设计结构,探究交联单体对乳液性能的影响。采用FTIR、TG、DSC对其进行了表征,测试了乳液的粒径。结果表明,当w(St)=15.0%(以核层和壳层所有单体的质量为基准,下同),核层与壳层的理论玻璃化转变温度(T_(g))分别为–10.0和30.0℃,核层交联单体乙烯基三乙氧基硅烷(A-151)和壳层交联单体γ-甲基丙烯酰氧基丙基三甲氧基硅烷(A-174)的质量分数分别为3.0%和2.0%时,乳液的稳定性和成膜性较好。与未加交联单体的均相粒子结构相比,核壳结构聚合物的最大热黏温度提高90℃,吸水率降低10.77%,缓解了水墨涂层的高温回黏问题,提高了涂膜的耐水性和耐热性。In order to solve the problem of "viscous when heated while brittle when cooled" with traditional acrylic emulsion,core-shell structure acrylate emulsions with soft core and hard shell particles were prepared from main monomers of methyl methacrylate(MMA),styrene(St) and butyl acrylate(BA) and modifying monomers of silane coupling agents,and characterized by FTIR,TG and DSC.The influence of crosslinked monomers on the properties of emulsion was investigated.The particle size of the emulsion was tested.The results showed that the emulsion exhibited better stability and film formation ability when the mass fraction of styrene was 15.0%(based on the mass of all monomers in the core and shell layers,the same below),the theoretical glass transition temperature(T_(g)) of the core layer and the shell layer were –10.0 ℃ and 30.0 ℃ respectively,and the mass fraction of cross-linked monomer vinyltriethoxysilane(A-151) in core layer and gamma-methacryloxy propyl trimethoxysilane(A-174) in shell layer was 3.0%and 2.0%,respectively.Compared with those of the homogeneous particle structure without crosslinked monomer,the maximum thermal adhesion temperature of the core-shell structure polymer was increased by 90 ℃,the water absorption was reduced by 10.77%,which alleviated the high-temperature adhesion problem of ink coatings while improved the water and heat resistance of the coating film.

关 键 词：水性油墨连接料 丙烯酸酯乳液 硅烷偶联剂 核壳结构 丙烯酸系列化学品 

分 类 号：TQ316.334[化学工程—高聚物工业]