Synthesis of castor oil water-borne polyurethane-acrylate hybrid emulsions

QU Jinqing; SHEN Huifang; CHEN Huanqin

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Synthesis of castor oil water-borne polyurethane-acrylate hybrid emulsions

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- Synthesis of castor oil water-borne polyurethane-acrylate hybrid emulsions
- CIESC Journal Issue 1, Pages: 168-173(2005)
- 作者机构：
  
  华南理工大学化学工程研究所,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 January 2005，
  
  Published：25 January 2005
- 稿件说明：
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QU Jinqing, SHEN Huifang, CHEN Huanqin. Synthesis of castor oil water-borne polyurethane-acrylate hybrid emulsions[J]. CIESC Journal, 2005, (1): 168-173.
DOI：

QU Jinqing, SHEN Huifang, CHEN Huanqin. Synthesis of castor oil water-borne polyurethane-acrylate hybrid emulsions[J]. CIESC Journal, 2005, (1): 168-173. DOI：

摘要

采用甲基丙烯酸甲酯（MMA）与蓖麻油水性聚氨酯乳液共聚反应制备聚氨酯丙烯酸酯（PUA）复合乳液，研究了蓖麻油水性聚氨酯性能、MMA添加量、引发剂种类和聚合温度对PUA复合乳液及涂膜性能的影响，并应用傅里叶红外光谱（FTIR）测定反应产物的结构.研究发现，用外观半透明或微透明的PU-M分散液制备的PUA乳液及涂膜性能优良.油溶性引发剂（AIBN）比水溶性引发剂（K2S2O8）更适合本体系的乳液聚合.随着MMA含量增大，PUA复合乳液胶粒粒径增大，黏度减小，涂膜光泽度下降，机械性能变好，耐水性增加.合适的MMA含量为体系总固含量的20%～30%.提出了PUA复合乳液胶粒形成及粒径长大机理.

Abstract

The castor oil polyurethane-acrylate hybrid emulsion (PUA) was prepared by the emulsion co-polymerization of castor oil polyurethane dispersion and methyl methacrylate (MMA). The effects of castor oil polyurethane dispersion

MMA content

the initiator and polymerization temperature on the properties of PUA emulsion and its film were investigated. The structure of PUA was characterized by Fourier transform infrared (FTIR). It was found that the PUA emulsion with excellent properties could be obtained by using PU dispersion with opalescent or translucent appearance

and the oil-soluble initiator (AIBN) was better than water-soluble initiator (K2S2O8) in the polymerization system.The mechaniscal properties and water resistance of PUA coating film were improved

while the average particle size

viscosity of PUA emulsions and PUA film gloss decreased as with increasing MMA content.The optimal MMA content was determined as 20%—30% of the total solid content of PUA emulsion.The mechanisms of particle formation and particle size growth of PUA emulsion polymerization were proposed.

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