A Solventless Waterborne Polyurethane Emulsifying Investigation

摘要：

A solventless waterborne polyurethane emulsion is synthesized by prepolymerization. The effecting factors including the ratio of isocyanate content to hydroxyl groups (-NCO/-OH),the reaction temperature and the carboxyl group content (-COOH ％) on target prepared emulsions viscosity; particle diameter and the water absorption are experimentally investigated during the reaction processes. The results show that:(1) the emulsion viscosity and water absorption decrease when the -NCO/-OH ratio (the ratio of isocyanate content to hydroxyl groups) increases, but the particle diameter increases. (2) the reaction rate increases when the temperature is higher, but the side reaction is more easily arisen. (3) both the emulsion viscosity and water absorption increase but the particle diameter decrease if the carboxyl content (-COOH ％) is bigger. (4) the properties of emulsion and film after coating are finer if glycol as the chain extender.

关键词： waterborne polyurethane viscosity particle diameter water absorption preparation

作者: Xueli Guo Quanguo He Zhengxiang Wang Jingjing Du

作者单位: Green Packaging & Biological Nanotechnology Laboratory Hunan University of Technology Zhuzhou, 412008, China

会议类型: 国际会议

会议名称: The 1st International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2007)(首届IEEE生物信息与生物医学工程国际会议)

会议地点: 武汉

会议语种:英文

页码: 1307-1310

在线出版日期: 2007-07-06（万方平台首次上网日期，不代表论文的发表时间）