Miles & Stockbridge P.C.
Amphiphilic macromolecular emulsifier with switchable surface activity and use thereof in preparation of polymer latex
A macromolecular emulsifier with switchable surface activity, and use thereof for preparation of polymer latex is disclosed. By using the macromolecular emulsifier with switchable surface activity as an emulsifier, a reversibly coagulable and re-dispersible polymer latex can be prepared by emulsion polymerization. The polymer latex can achieve the coagulation of latex particles by heating and aerating with nitrogen, air, inert gas and/or adding a small amount of alkali solution; the coagulated latex particles can be restored and re-dispersed into stable latex by aerating with carbon dioxide and/or adding a small amount of acid solution. The coagulation and re-dispersion process is reversible and is easy to control.
ZHEJIANG UNIVERSITY
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Shiping Guoqiang Bogeng Wenjun Qi
Zhu Yu Li Wang Zhang