Page 223 - 《精细化工》2020年第11期

第 37 卷第 11 期 精 细 化 工 Vol.37, No.11
2020 年 11 月 FINE CHEMICALS Nov. 2020

建筑用化学品
水性苯丙共聚物改性醇酸树脂的制备及性能

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朱 辉，李小瑞 ，杨 凯，李凯斌，王琦超，王 倩
（陕西科技大学 化学与化工学院，教育部轻化工助剂化学与技术重点实验室，陕西 西安 710021）

摘要：以油酸、季戊四醇、邻苯二甲酸酐、苯甲酸为原料，采用丙二醇甲醚醋酸酯为溶剂合成了基础醇酸树脂；
用过氧化苯甲酰、过氧化苯甲酸叔丁酯双引发剂、分步引发烯类单体共聚制备了苯丙共聚物改性醇酸树脂，将
其用于水性改性醇酸树脂涂料的制备。考察了不同油酸含量（以油酸、季戊四醇、邻苯二甲酸酐、苯甲酸总质
量为基准，下同）对水性醇酸树脂结构与性能的影响。通过 FTIR、TGA、激光粒径散射仪对树脂的结构、稳
定性和乳液性能进行了表征。测定了树脂的漆膜性能，包括耐水性、表干时间、硬度、电化学性能。结果表明，
n(油酸)∶n(季戊四醇)∶n(邻苯二甲酸酐)∶n(苯甲酸)=1.0∶1.0∶1.0∶0.3，油酸含量为 47%时，聚合物乳液粒径
为 74.44 nm，聚合物分散性指数为 0.262，胶膜的吸水率为 14.5%，接触角为 70.87°，有较好的耐水性。改性醇
酸树脂的表干时间缩短为 0.5 h，实干时间缩短为 24.0 h，硬度达 HB。
关键词：苯丙树脂；双引发剂；改性醇酸树酯；水性涂料
中图分类号：TQ324.43 文献标识码：A 文章编号：1003-5214 (2020) 11-2369-08

Preparation and properties of water-based styrene-acrylic

copolymer modified alkyd resin

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ZHU Hui, LI Xiaorui , YANG Kai, LI Kaibin, WANG Qichao, WANG Qian
（Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, College of
Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China）

Abstract: An alkyd resin was synthesized from oleic acid, pentaerythritol, phthalic anhydride and benzoic
acid using propylene glycol methyl ether acetate as solvent. Subsequently, benzoyl peroxide and tert-butyl
peroxybenzoate double initiators were used to initiate the copolymerization of olefin monomers in steps to
prepare modified alkyd resins. Then, the modified alkyd resins were used to prepare water-based alkyd
resin coatings. The effects of different oleic acid contents (based on the total mass of oleic acid,
pentaerythritol, phthalic anhydride and benzoic acid, the same below) on the structure and properties of
water-based alkyd resin were studied. The structure, stability and emulsion properties of the resin were
characterized by FTIR, TGA and laser particle size scattering instrument. The film properties of the resin
including water resistance, surface drying time, hardness and electrochemical properties were measured.
The results showed that under the conditions of n(oleic acid)∶n(pentaerythritol)∶n(phthalic anhydride)∶
n(benzoic acid)=1.0∶1.0∶1.0∶0.3 and oleic acid content of 47%, the particle size of the emulsion was
74.44 nm, and the polymer dispersion index was 0.262. The film had water absorption of 14.5% and a
contact angle of 70.87°, and exhibited good water resistance. The surface drying time and dry time of the
modified alkyd resin was shortened to 0.5 and 24.0 h, and the hardness reached HB.
Key words: styrene-acrylic resin; double initiators; modified alkyd resin; water-based paint

水性醇酸树脂可显著降低 VOC 的排放，减少对 其缺陷 [2-3] 。
[1]
环境的污染和人体的危害，近年来受到广泛关注 。 目前，国内外对水性醇酸树脂的改性研究较多。
但其含有大量的酯键，涂膜存在硬度较低、耐候及 其中，丙烯酸酯类单体由于种类繁多、性能各异，
[4]
耐腐蚀性较差、干燥速度慢等缺点，需改性来改善 被广泛用于醇酸树脂的改性中。王姚等 采用丙烯

收稿日期：2020-05-22; 定用日期：2020-06-16; DOI: 10.13550/j.jxhg.20200425
基金项目：陕西省教育厅重点实验室科研计划项目（2010JS058）；陕西省科技计划项目（2017GY-154）
作者简介：朱 辉（1994—），男，硕士生，E-mail：1572062093@qq.com。联系人：李小瑞（1960—），女，教授，E-mail：xrli@sust.edu.cn。