Synthesis and Characterization of High Performance Water Borne Polyurethane Emulsion
ZHANG Hui, SHEN Hui-fang, ZHANG Xin-ya, LI Yong-jin, CHEN Huan-qin(Institute of Chemical Engineering, South China University of Technology, Guangzhou 510641, China)
(Institute of Chemical Engineering, South China University of Technology, Guangzhou 510641, China
Abstract��
High performance and environmental acrylic ester modified water borne polyurethane emulsion has become the research hotspot in coating industries. The mixture of water borne polyurethane prepolymer(PU) and vinyl monomer was prepared by principal raw materials, such as toluene diisocyanate(TDI-80), polyether binary alcohol(N210), dimethylol propionic acid(DMPA) and methyl methacrylate(MMA), with the method of emulsion polymerization in situ. Then through free-radical emulsion polymerization, polyurethane-acrylate(PUA) hybrid emulsion was synthesized with the addition of initiator. It was observed that the properties and appearance of the PUA emulsion were nearly related with the ratio of NCO/OH, the amount of DMPA and the neutralization degree. Prepared under the condition:1.3��1.4 of NCO/OH ratio, about 2.6% of ��COOH content, and 90%��100% of neutralization degree, PUA emulsion shows good appearance and excellent properties.
ZHANG Hui, SHEN Hui-fang, ZHANG Xin-ya, LI Yong-jin, CHEN Huan-qin.Synthesis and Characterization of High Performance Water Borne Polyurethane Emulsion[J]. Chemcial Industry and Engineering, 2005,22(5): 342-345
2005, Vol. 22 
