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Citation: QIU Shi-Qi, ZHANG Xu-Dong, LIAO Yang-Fei. Synthesis of Double Self-Crosslinked Polyurethane Acrylate Hybrid Emulsion[J]. Chinese Journal of Applied Chemistry, ;2008, 25(11): 1339-1344. shu

Synthesis of Double Self-Crosslinked Polyurethane Acrylate Hybrid Emulsion

1.
School of Chemistry and Chemical Engineering, Hunan University, Changsha 410082

Corresponding author: ZHANG Xu-Dong,
Received Date: 23 September 2007
Available Online: 5 January 2008

A double self-crosslinked polyurethane-acrylate(PUA) hybrid emulsion crosslinked not only by ketone and hydrazide groups but also by epoxy and carboxyl groups was synthesized by emulsion polymerization in situ with toluene diisocyanate(TDI-80),polyether binary alcohol(Diol-1000),butanediol(BDO),dimethylol propionic acid(DMPA),methyl methacrylate(MMA),Glycidyl methacrylate(GMA),adipic dihydrazide(ADH) and diacetone acrylamide(DAAM) as reactants.The influence of the ratio of hydrazide group to isocyanate group,the ratio of ketone group to hydrazide group to the dosage of epoxy group on the preparation and performance of the emulsion and its film was studied.When the mass fractions of ADH,DAAM,COOH in DMPA and GMA in PUA were respectively 4.1%,2.2%,1.6%,and 4.0%,the emulsion and film both exhibited good properties.The pencil hardness of the double self-crosslinked PUA hybrid emulsion was 3H.The results obtained by particle size analyzer show that the average particle size of the PUA was about 100 nm and the particle size distribution was uniform.
- self-crosslinking,
- waterborne,
- polyurethane,
- acrylate,
- emulsion
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