摘要
由于以石化原料合成的胶粘剂在生产和使用过程中会对环境带来不良影响,近年来采用可再生资源,如大豆蛋白合成环保型胶粘剂已成为发展趋势。以尿素和亚硫酸钠改性大豆分离蛋白(SPI),并与醋酸乙烯酯(VAc)等复合单体在过硫酸铵(APS)引发下进行接枝共聚反应,合成了性能较好的VAc/SPI接枝共聚乳液胶粘剂,降低了原料成本。通过正交实验研究了不同的反应条件对该乳液胶粘剂性能的影响,优化的反应条件是采用半连续乳液聚合工艺,以改性SPI自身作为保护胶体,改性剂尿素的浓度为3mol/L,复合单体与SPI的质量比为2.0:1,反应温度为68℃,共聚反应时间为4～5h。由此制得的乳液胶粘剂具有良好的综合性能。
In recent years,because adhesives made by petroleum chemicals have negative influence on environment in the process of manufacture and utilization,the environmental friendly adhesives which made by renewable natural resources, for example soy proteins （SPI）, are becoming a development trend. A emulsion adhesive by vinyl acetate（VAc）/SPI grafting copolymerization（VAc-g-SPI） was synthesized with ammonium persulphate （APS） as an initiator,urea and sodium sulfite as SPI＇s modified agent,the cost of raw material was reduced. The effects of different process conditions on performance of the emulsion adhesive were studied in orthogonal experiment,and the optimal conditions were as follows： using modified SPI as protective colloid in 3 mol/L urea solution, with semi-continuous emulsion copolymerization ,mass ratio of mixed monomer to SPI at 2.0：1 ,reaction temperature at 68℃and copolymerization reaction time between 4 hour and 5 hour. Under the optimal condition,the emulsion adhesive had good integration performance.
出处
《中国胶粘剂》
CAS
2008年第5期15-19,共5页
China Adhesives
基金
辽宁省教育厅科学研究计划资助项目(05L197)
关键词
大豆蛋白
接枝共聚
乳液
胶粘剂
改性
醋酸乙烯酯
尿素
亚硫酸钠
soy protein
grafting copolymerization
emulsion
adhesive
modification
vinyl acetate
urea
sodium sulfite
