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Preparation process of non organic solvent type fluorine-containing soapless emulsion

An organic solvent and soap-free emulsion technology, applied in the field of polymer chemistry, can solve the problems of unfavorable application performance and environmental protection of fluorine-containing emulsions, achieve the effects of eliminating organic volatiles, improving surface properties, and a wide range of effects

Inactive Publication Date: 2007-07-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what preparation method is used, the final product contains conventional emulsifiers or (and) organic solvents, which is detrimental to the application performance and environmental protection of fluorine-containing emulsion products, especially the surface properties of fluorine-containing coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Mix acrylic acid, methyl acrylate and trifluoroethyl acrylate at a mass ratio of 1:0.1:0.01 to prepare solution A; mix solution A with azobisisobutyronitrile at a mass ratio of 100:0.05 Obtain solution B evenly, then add solution B dropwise to the organic solvent acetone at 60°C, wherein the mass ratio of solution B to organic solvent is 100:10, the time for dropping is 0.5 hours, and then continue to polymerize for 3 hours to obtain Organic solvent solution C of fluorine copolymer; add water and ammonia to solution C and stir evenly, wherein the mass ratio of solution C, water and ammonia is 100:80:80, then distill off organic solvent and water to obtain water-soluble fluorine-containing Copolymer; mix methyl acrylate, water-soluble fluorine-containing copolymer, water and water-soluble initiator ammonium persulfate in a mass ratio of 1:1:1:0.002, and polymerize at 90°C for 2 hours to obtain organic-free Solvent-based fluorinated soap-free emulsion.

Embodiment 2

[0008] Embodiment 2: Methacrylic acid, methyl methacrylate and trifluoroethyl methacrylate are mixed uniformly in a mass ratio of 1:0.5:0.1 to prepare solution A; solution A and benzoyl peroxide are mixed in a ratio of 100: Mix evenly with a mass ratio of 0.1 to obtain solution B, then add solution B dropwise to the organic solvent tetrahydrofuran at 70°C, wherein the mass ratio of solution B to organic solvent is 100:100, the dropping time is 1 hour, and then continue to polymerize After 2.5 hours, organic solvent solution C of fluorine-containing copolymer was obtained; water and potassium hydroxide were added to solution C and stirred evenly, wherein the mass ratio of solution C, water and potassium hydroxide was 100:2000:1, and then the organic solvent was removed by distillation. solvent and water to obtain a water-soluble fluorine-containing copolymer; methyl methacrylate, water-soluble fluorine-containing copolymer, water and water-soluble initiator potassium persulfate ...

Embodiment 3

[0009] Example 3: Mix acrylic acid with hexyl acrylate and nonadecafluoroacrylate or perfluorooctyl (N-ethyl-N-ethyl acrylate) sulfonamide in a mass ratio of 1:1:0.3 to prepare a solution A; Mix solution A and azobisisobutyronitrile at a mass ratio of 100:1 to obtain solution B, and then add solution B dropwise to the organic solvent butyl acetate at 80°C, wherein solution B and organic solvent The mass ratio is 100:500, the dropping time is 1.5 hours, and then continue to polymerize for 2 hours to obtain the organic solvent solution C of the fluorine-containing copolymer; add water and sodium hydroxide to the solution C and stir evenly, wherein the solution C, water and The mass ratio of sodium hydroxide is 100:5000:0.3, and then the organic solvent and water are removed by distillation to obtain a water-soluble fluorine-containing copolymer; Mix evenly at a mass ratio of 1:0.3:40:0.01, and polymerize at 80°C for 4 hours to obtain an organic-solvent-free, fluorine-containing,...

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PUM

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Abstract

The present invention discloses preparation process of no organic solvent and no soap fluoric emulsion. Fluoric copolymer is first obtained through mixing (methyl) fluoric acrylate, (methyl) acrylic acid, vinyl monomer and liposoluble initiator, polymerizing of the mixture in organic solvent and alkali neutralizing; and then mixed with vinyl monomer, water soluble fluoric copolymer and water to pre-emulsify and initiated with initiator to polymerize to obtain the no organic solvent and no soap fluoric emulsion. The present invention can eliminate the adverse effect of small molecular weight emulsifier and organic solvent on the application performance of fluoric emulsion product, raise the surface performance of fluoric coating and eliminate organic volatile in product.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, in particular to a method for preparing an organic solvent-free fluorine-containing soap-free emulsion. Background technique [0002] Fluoropolymers have been widely used due to their high surface activity, high heat resistance stability, high chemical inertness, hydrophobicity and oil repellency, and the "three high and two hydrophobic" properties, and emulsion is the main application form. At present, the preparation methods of fluorine-containing emulsion mainly include the following types: (1) homopolymerization or copolymerization of fluorine-containing monomer under the joint action of conventional emulsifier / fluorine-containing emulsifier; (2) under the action of conventional emulsifier / organic solvent Homopolymerization or copolymerization of fluorine-containing monomers; (3) Simple blending of polytetrafluoroethylene emulsion and conventional emulsion. However, no matter what preparatio...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F2/06C08F4/04C08F4/34
Inventor 沈一丁李刚辉费贵强李小瑞王海花
Owner SHAANXI UNIV OF SCI & TECH
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