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Study On Preparation Of Waterborne Epoxy Emulsion And Its Curing Agent

Posted on:2008-12-22Degree:MasterType:Thesis
Country:ChinaCandidate:Q ChenFull Text:PDF
GTID:2121360245991628Subject:Materials science
Abstract/Summary:PDF Full Text Request
Emulsification effects of different compounding of general emulsifiers were studied in this paper, the influences of some properties of emulsifiers to epoxy resin were known. Then a kind of epoxy non-ionic emulsifier were synthesized with epoxy resin and tween 80, and the stable epoxy emulsion was prepared by phase inversion method, which had particle size less then 10μm. The best condition was: the ratio of emulsifier QB and sodium lauryl sulfate is 9:1; emulsifier content is 10%, from the study on emulsification temperature, HLB value of emulsifier, emulsifier content, stirring force. The change of phase in the process of phase inversion was also studied, and the phase inversion of epoxy resin was found to have something to do with the array of emulsifier on the interface film and the balance of the force between water and oil.Then hyaline waterborne curing agent with DETA, epoxy resin 501 and epoxy resin 6101, salified by acetic acid was synthesized, which had suitable viscosity at last. The curing agent had good water solubility and emulsifying power, which could help epoxy resin to dissolve in water without another emulsifier. According to the test, it had secondary amine salt and some epoxy group, meeting the forecast. It also had a storage life less than 2 months and can not be used over 160℃. Its reality amine value was 0.29mol/100g.Finally the film was made with home-made epoxy emulsion and waterborne curing agent, and the results showed that: because of totally solidification and water volatilization, the film had proper skin drying time, high glossiness, hardness, adhesive power, resistance to water and alkali, when epoxy emulsion: waterborne curing agent=100: 50, and curing temperature is 50℃.
Keywords/Search Tags:waterborne, epoxy, curing agent, phase inversion, emulsification
PDF Full Text Request
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