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Citation: HUANG Juanping, LI Sufang, LI Jiao, KANG Meng, WANG Congcong, LIU Tingting. Synthesis and Properties of Waterborne Epoxy Composite Emulsifier[J]. Chinese Journal of Applied Chemistry, ;2014, 31(3): 256-261. doi: 10.3724/SP.J.1095.2014.30213 shu

Synthesis and Properties of Waterborne Epoxy Composite Emulsifier

1.
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Corresponding author: LI Sufang,
Received Date: 2 May 2013
Available Online: 4 July 2013

A novel anionic epoxy emulsifier EP-D was synthesized by epoxy resin E-44,2-amino-5-sulfobenzoic acid,ethylene glycol monobutyl ether and butyl alcohol.Nonionic epoxy emulsifier EP-PEG was synthesized from E-44 and poly(ethylene glycol)(PEG6000) with molar ratio of 2:1.EP-D/EP-PEG composite emulsifiers were obtained by mixing EP-D and EP-PEG with different mass ratio.The emulsifying properties and emulsion surface tension,electric conductivity,the Zeta potential and particle size of colloidal particles were studied when the addition amount of EP-D/EP-PEG or EP-PEG was 6%~12% respectively.The best performance of epoxy emulsion was observed when the mass ratio of EP-D and EP-PEG was 3:5,and their total quantity reached to 9%.Compared with EP-PEG emulsion system,EP-D/EP-PEG emulsion system led to less emulsifier dosage,better emulsion spreadability,higher stability,and elevation of the solid content by more than 10% in phase inversion,The Zeta potential of the epoxy colloidal particles of reached to-41.9 mV.The emulsion particles size decreased to 342 nm.The emulsion surface tension decreased to 25.5 mN/m.The viscosity was reduced to 14 mPa·s.These indicate that a waterborne epoxy emulsion with good stability and high solid content can be obtained from EP-D/EP-PEG composite emulsifier by mixing new synthetic emulsifiers EP-D and EP-PEG.
- emulsifying,
- waterborne epoxy emulsion,
- mixing,
- stability
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