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林产化学与工业 ›› 2009, Vol. 29 ›› Issue (3): 31-37.

• 研究报告 • 上一篇    下一篇

聚氨酯-丙烯酸酯-环氧大豆油复合乳液的合成与性能

郭文杰, 傅和青, 司徒粤, 徐丽, 蓝仁华, 陈焕钦   

  1. 华南理工大学 化学与化工学院, 广东 广州 510640
  • 收稿日期:2008-05-28 修回日期:1900-01-01 出版日期:2009-06-30 发布日期:2009-06-30

Preparation and Properties of Waterborne Polyurethane- acrylate-epoxidized Soybean Oil Hybrid Emulsion

GUO Wen-jie, FU He-qing, SITU Yue, XU Li, LAN Ren-hua, CHEN Huan-qin   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2008-05-28 Revised:1900-01-01 Online:2009-06-30 Published:2009-06-30

摘要: 采用环氧大豆油(ESO)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸-2-羟丙酯(HPA )改性水性聚氨酯,制得以丙烯酸酯为核、聚氨酯为壳的核壳结构聚氨酯-丙烯酸酯-环氧大豆油复合乳液。用红外光谱仪( FT-IR )、马尔文粒度分析仪等测试手段对合成产物进行了结构和性能的表征。考察了工艺参数对聚合过程的影响,以及ESO和MMA用量对复合乳液及其胶膜性能的影响。结果表明,较佳的工艺条件为预聚温度 80℃,时间 1.5h;扩链温度 70℃,时间4~5h;中和温度 40℃,加水乳化分散时间为 10min,转速为 6000 r/min;乳液聚合温度 70℃,时间为4~5h;当ESO用量为 4%~6%、甲基丙烯酸甲酯用量为 30% 时,可制得粒径较小贮存稳定性好的聚氨酯-丙烯酸酯-环氧大豆油复合乳液,该复合乳液的胶膜耐介质性好、吸水率低。

关键词: 聚氨酯, 丙烯酸酯, 环氧大豆油, 复合乳液, 核壳

Abstract: Waterborne polyurethane(WPU) was modified by epoxidized soybean oil(ESO), methyl methacrylate (MMA), butyl acrylate (BA) and 2-hydroxypropyl acrylate (HPA), to obtain polyurethane-acrylate-ESOhybrid emulsion whichhas a core-shell structure with acrylate as core and polyurethane as shell. The structure and properties of thehybrid emulsion were characterized by Fourier transform infrared (FT-IR) spectra and particle size analyzer. Effects of process parameters on polymerization and dosages of ESO and MMA on properties of thehybrid emulsion and its films were investigated. Results showed that the optimal process was as follows:temperatures of prepolymerization, chain-extending, neutralization and emulsion polymerization were 80,70,40 and 70℃, respectively, times of prepolymerization, chain-extending, emulsion polymerization were 1.5,4-5 and 4-5h,respectively, and rotation rate was 6000r/min.When contents of ESO and MMA were 4%-6% and 30%,respectively,hybrid emulsion with small particle size andgood store stability was prepared. Its filmhadgood media resistance and low water absorption.

Key words: polyurethane, acrylate, epoxidized soybean oil, hybrid emulsions, core-shell

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