Synthesis and Properties of Hydroxylic Fluoroacrylate Resins with High Solid Content
Liu Hu1，2， Xiao Guomin3
1. National Key Laboratory of Advanced Composites， AECC Beijing Institute of Aeronautical Materials， Beijing 100095， China；
2. Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material， AECC Beijing Institute of Aeronautical Materials， Beijing 100095， China；
3. School of Chemistry and Chemical Engineering， Southeast University， Nanjing 211189， China
Abstract: Hydroxylic fluoroacrylate resins were synthesized via free radical-initiated solution copolymerization of methyl methacrylate， n-butyl acrylate， 2-hydroxyethyl methacrylate （HEMA） and fluoromonomers of dodecafluoroheptyl methacrylate （DFHMA） or hexafluorobutyl methacrylate （HFBMA） using 3-mercapto-1， 2-propanediol as chain transfer agent. The effect of 3-mercapto-1， 2-propanediol dosage on molecular weight， viscosity and hydroxyl content of the synthesized resins was investigated， and the surface property， optical transmittance， chemical resistance and general coating properties of polyurethane films prepared from the resins and isocyanate curing agent were tested. The results showed that the molecular weights and viscosities of the two resins with solid content of 60％ decreased to 1 891， （231±2）mPa·s and 2 144， （362±3）mPa·s respectively at 3-mercapto-1， 2-propanediol dosage of 4％. The polyurethane films were hydrophobic and transparent and also displayed admirable chemical resistance and overall coating properties.
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