High-Temperature Curable Water-Borne Self-Stratifying Fluorine-Containing Low Surface Energy Coatings and Coating Properties

In order to obtain high-temperature curing self-layering fluorine-containing low surface energy coating with excellent performance, an active emulsion-containing hydroxy acrylic resin (E1) and a fluorine-containing hydroxy acrylic resin (E2) were synthesized by anionic emulsion polymerization. The effect of the amount of emulsifier, the amount of initiator and temperature on these two polymerizations was studied. E1 and E2 emulsions were compounded into a high-temperature curable fluorine-containing low surface energy coating with self-layering effect. The effect of the monomers with reactive functional groups (-COOH, -OH), fluorine-containing monomers, resin compounding ratios, initial temperature and heating rates on the film properties was investigated. Results show that under the condition of 80℃, the best experimental solution on E1 and E2 emulsion with less amount of gel, uniform particle size distribution and best stability is as follows: the acrylic acid (AA) monomer and hydroxy acrylic acid (HEMA) monomer account for 4.5% and 2.8% of the total mass of E1 and E2 monomers, respectively; 2-(perfluorooctyl)ethyl methacrylate (TEMAc-8) accounts for 80% of the total mass of the E2 monomer, and the amount of the initiator accounts for 0.5% and 0.6% of the total mass of E1 and E2 monomers, respectively. When the E2 emulsion and the curing agent account for 60% and 6% of the mass of the blended emulsion, respectively and at an initial temperature of 80℃, the film is heated to 140℃ via a heating rate of 0.8℃/min, and then is incubated for 10 min. The layering effect and various properties of the obtained coating film are excellent. © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.