Fluorine-containing acrylate copolymer synthesis method

Abstract

The invention discloses a fluorine-containing acrylate copolymer synthesis method. The fluorine-containing acrylate copolymer synthesis method comprises the following steps of: obtaining mixed monomer miniemulsion of (perfluorooctyl) ethyl acrylate, n-butyl methacrylate and methylmethacrylate by taking methacryloyloxyethyl trimethyl ammonium chloride (DMC) as a cation emulsifying agent and cetane as co-stabilizer according to a mini-emulsification technology, and carrying out miniemulsion copolymerization under the initiation action of AIBN (2,2-azobisisobutyronitrile) to obtain miniemulsion of a fluorine-containing acrylate copolymer. The fluorine-containing acrylate copolymer has the beneficial effects that the fluorine-containing acrylate copolymer has a relatively high fluorine-containing monomer conversion rate; the cost is reduced; the utilization rate of a fluorine-containing monomer is effectively increased; and after polymerization is ended, an emulsifying agent can be removed by a simple and convenient demulsification precipitation method to obtain the fluorine-containing copolymer product with the relatively high purity, so that the copolymer has relatively good water and oil repellency and antifouling property.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a synthesis method of fluorine-containing acrylate copolymer. Background technique [0002] Perfluoroalkyl acrylate monomers can be homopolymerized or copolymerized by free radicals to obtain polymers with a high proportion of fluorine. Due to the low surface energy of fluorine atoms, this type of polymer has good water, oil, and antifouling properties . In addition, polymers formed by polymerizing acrylate monomers have the advantages of excellent optical stability and thermal stability, and good oxidation resistance. Therefore, fluorine-containing acrylate polymers can be used in anti-biological pollution coatings for ship hulls, clothing finishing agents, self-cleaning coatings for car windows and walls, etc. It has good application value and market prospect. [0003] The synthesis of fluorine-containing acrylate polymers can adopt the method ...

AI Technical Summary

Problems solved by technology

However, in the process of emulsion polymerization, the fluorine-containing monomer needs to diffuse into the solubilized micelles through the water phase for polymerization, and the fluorine-containing monomer is highly hydrophobic, resulting in low utilization rate of the fluorine-containing monomer in the copolymerization process, waste of resources, and high cost. improve

Patent CN201310507015.2 uses a fluorine-containing amphiphilic block copolymer containing thiocarbonate active end groups as an emulsifier to prepare a fluorine-containing acrylate waterproof and oil-repellent fabric finishing agent. The fluorine-containing part in the emulsifier and the fluorine-containing monomer have Good compatibility, the hydrophilic part of the emulsifier can stabilize the latex particles and make the emulsion have high stability. However, the macromolecular emulsifier needs to be synthesized by the reversible addition-fragmentation chain transfer (RAFT) method in advance, and the steps are cumbersome. higher cost

And the hydrophilic segment remaining in the fluorine-containing copolymer after polymerization will reduce the water contact angle and the antifouling performance of the fluorine-containing copolymer

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