| Preparation and Characterization of Two-component Waterborne Poly-urethane Comprised of Water-soluble Acrylic Resin and HDI Biuret |
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| 作者姓名： | ZHOUXinhua |
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| 作者单位： | [1]Department of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Technologe, Guangzhou 510225, China [2]Institute of Chemical Engineering, South China University of Technology, Guangzhou 510640,China |
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| 基金项目： | ACKN0WLEDGEMENTS The authors would like to acknowledge the assistance of Guangdong Provincial Laboratory for Green Chemical Technology. We also thank ZHANG Yan-hong for performing particle size measurements. |
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| 摘 要： | A two-component waterborne polyurethane （2K-WPU） was prepared by mixing water-soluble acrylic resin and hexamethylene diisocyanate biuret, and then diluted for phase inversion with water. Compared with water-soluble acrylic resin, the phase inversion of 2K-WPU occurs at lower water content. It is indicated by TEM that 2K-WPU particles show a core-shell structure, in which HDI biuret is encapsulated by hydrophilic acrylic resin. 2K-WPU emulsion with HDI biuret has larger particle size and narrower distribution index, while for 2K-WPU emulsion with HDI isocyanurate, the latex not only has large particle size, but also has two-peak distribution. FTIR shows that the reaction between HDI biuret and acrylic resin can complete in 12h. In addition, studies on effect of composition of acrylic resin on performance of 2K-WPU show that narrowing the polar difference between water-soluble acrylic resin and HDI biuret and improving the miscibility of two components are the key to prepare the transparent and high gloss films with high crosslinking density.
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| 关 键 词： | 水性双组份 丙烯酸聚氨酯 合成 表征 丙烯酸脂 相转化 |
| 收稿时间： | 2004-11-22 |
| 修稿时间： | 2004-11-222005-08-01 |
Preparation and Characterization of Two-component Waterborne Polyurethane Comprised of Water-soluble Acrylic Resin and HDI Biuret |
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| Xinhua ZHOU, Weiping TU,Jianqing HU.Preparation and Characterization of Two-component Waterborne Poly-urethane Comprised of Water-soluble Acrylic Resin and HDI Biuret[J].Chinese Journal of Chemical Engineering,2006,14(1):99-104. |
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| Authors: | Xinhua ZHOU Weiping TU Jianqing HU |
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| Affiliation: | aDepartment of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Technologe, Guangzhou 510225, China;bInstitute of Chemical Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | A two-component waterborne polyurethane (2K-WPU) was prepared by mixing water-soluble acrylic resin and hexamethylene diisocyanate biuret, and then diluted for phase inversion with water. Compared with water-soluble acrylic resin, the phase inversion of 2K-WPU occurs at lower water content. It is indicated by TEM that 2K-WPU particles show a core-shell structure, in which HDI biuret is encapsulated by hydrophilic acrylic resin. 2K-WPU emulsion with HDI biuret has larger particle size and narrower distribution index, while for 2K-WPU emulsion with HDI isocyanurate, the latex not only has large particle size, but also has two-peak distribution. FTIR shows that the reaction between HDI biuret and acrylic resin can complete in 12h. In addition, studies on effect of composition of acrylic resin on pefformance of 2K-WPU show that narrowing the polar difference between water-soluble acrylic resin and HDI biuret and improving the miscibility of two components are the key to prepare the transparent and high gloss films with high crosslinking density. |
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| Keywords: | waterborne polyurethane two-component acrylic resin phase inversion |
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