Synthesis And Application Of Water-borne And Air-drying Silicon-containing Fluorinated Acrylate Resins

Study on the preparation and performance of water-borne and air-drying silicon-containing fluorinated acrylate resins based on solution polymerization was reported in this paper. Different factors for the resin film was systematic analysed the significantly effects of different performance. Through the process of improvement and analysis to identify the optimum reaction conditions: methyl methacrylate (MMA): butyl acrylate (BA): styrene (ST): acrylic acid-β-hydroxypropyl acrylate (HPA): Vinyl (VeoVa) = 50:10:8:4:2 (weight ratio). Using hexafluoro butyl acrylate (6F) as the fluoride modified monomer, methyl trimethoxy silane (MTOS) as a silicon modified monomer, ethylene glycol butyl ether as solvent to synthesize a stable water-borne and air-drying silicon-containing fluorinated acrylate resins.Through the Complete mutual analysis of experiments, the fluorine content (elements of quality content), silicon content, content of hydrophilic group interaction to the properties of the film was discussed. The rigidity and water resistance of resin was greatly improved when the content of the hydrophilic group was 10%, the content of fluorine was 10% and the content of silicon was 1%. The feed ratio of the comonomers could be adjusted to meet the practical requirements. It was studied that when used the MTOS as a silicon modified monomer and the content of silicon was 3% for modification; the resin of low cost, practical, and very suitable for industrial production and application.A core-shell silicon-containing fluorinated acrylate emulsion was synthesized by core-shell emulsion polymerization. Ammonium persulfate (APS) as initiator, sodium dodecyl sulfate (SDS) and nonylphenol polyoxyethylene(OP-10) mixture as emulsifier, MMA, BA, acrylic acid (AA), VeoVa as the basic monomer for the core-shell polymerization, HPA, vinyl ethylene carbonate(VEC) as the cross-linked groups provided monomer,γ-methacryl trimethoxysilane (DB-570), methyltrimethoxysilane (MTOS) as silicon modified monomer, methyl methacrylate dodecafluroheptyl ester (12F) for the fluorine modified monomers to synthesis the uniform size particle core-shell emulsion whose diameter of core about 100-150nm, thickness of shell about 40-60nm. To observe the latex particle by transmission electron microscopy morphology.To improve the film adhesion by 5 % (mass percentage) EGBE as film former emulsion. DB-570 and MTOS for silicon modification; 12F for fluorine modification will help to improve the coating rigidity and water-resistant. To discuss the film application performance with AZ as cross-linking agent. VEC comparison compare HPA monomer into performance improvement becomes more apparent.When the modified monomer VEC: DB-570: MTOS: 12F = 2:2:2:5, by EGBE as the film forming additive and AZ crosslinked core-shell emulsion, the modified acrylic emulsion of hardness, water resistance, adhesion, flexibility and surface properties have much improvement.