硅氧烷偶联剂VTES及含氟丙烯酸酯G04改性苯丙乳液的合成及性能研究  

Synthesis and properties of VTES/G04 modified styrene-acrylate emulsions

作　　者：赵佳树[1] 魏刚[1] 乔宁[1] 

机构地区：[1]北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》2012年第4期47-51,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"863"计划(2009AA03Z802)

摘　　要：为提高苯丙乳液的耐热防腐性能,利用乙烯基三乙氧基硅烷(VTES)和甲基丙烯酸十二氟庚酯(G04)对传统苯丙乳液进行改性。采用半连续乳液聚合工艺,通过甲基丙烯酸甲酯、丙烯酸丁酯、苯乙烯、丙烯酸与VTES和G04的接枝共聚反应,合成了稳定的有机硅氟改性苯丙乳液。通过红外光谱对共聚产物进行了结构表征,并考察了VTES和G04含量对改性乳液涂膜吸水率、附着力、耐高温、耐蚀等性能的影响。结果表明,当单体中VTES和G04的质量分数分别为5%和18%时,改性乳液涂膜吸水率降至5%以下,涂膜机械性能和耐蚀性能良好,且在120℃下不发粘、无起皮鼓泡等变化。此外,当乙醇添加量为5%时,可有效抑制VTES自身缩聚;当引入适量丙烯酸时,乳液涂膜铅笔硬度可提升至2H。A modified styrene-acrylate emulsion which can be used at high temperature to irapart anti-corrosion re- sistance has been prepared using triethoxyvinylsilane （VTES） and dodecafluoroheptyl methacrylate （G04）. Using methacrylate, butyl acrylate, styrene, acrylic acid, VTES and G04 as co-monomers, a stable fluorosiloxane modi- fied styrene- acrylate emulsion was synthesized by a semi-continuous polymerization proces.. FT-IR spectroscopy was used to characterize the copolymer, and the effects of varying the amounts of VTES and G04 on the water ab- sorption, attachment strength, high temperature performance and anti-corrosion performance of the modified emul- sion films were studied. The results showed that the modified emulsion film had excellent mechanical and anti-cor- rosion properties below 120℃ , and the water absorption of the .film was reduced to 5% whet, the amounts of VTES and G04 were 5% and 18% , respectively, of the total amount of co-monomers. Besides, when the amount of alco- hol was 5% , the self-condensation of VTES can be inhibited, and the hardness of the emulsion film was improved to 2H with a 3% amount of AA.

关 键 词：苯丙乳液 乙烯基三乙氧基硅烷 甲基丙烯酸十二氟庚酯 水性涂料 耐高温 防腐蚀 

分 类 号：TQ630.7[化学工程—精细化工]