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Preparation process of anion macromolecule/cation micro molecule composition for emulsion polymerization

An emulsion polymerization and anionic technology, applied in the field of polymer chemistry, can solve the problems of reducing the surface properties of the coating, reducing the mechanical stability of the emulsion and the stability of high and low temperature, and affecting the application effect of the product, so as to reduce the adverse effects and improve the surface properties. , to ensure the effect of surface performance

Inactive Publication Date: 2008-11-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the small-molecule emulsifiers in emulsion products are all adsorbed on the latex particles in the form of physical adsorption. This adsorption method makes the small-molecule emulsifier molecules easily desorbed from the surface of latex particles, making the emulsion mechanically stable and stable. The high and low temperature stability is reduced, and the small molecule emulsifier molecules are easy to migrate from the interior of the emulsion coating to the coating surface, reducing the surface properties of the coating and affecting the application effect of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: acrylic acid and methyl acrylate were mixed uniformly at a mass ratio of 1:0.1 to obtain solution A; solution A and azobisisobutyronitrile were uniformly mixed at a mass ratio of 100:0.05 to obtain solution B, and then at 60 Solution B is added dropwise in the organic solvent acetone under ℃, wherein the mass ratio of solution B and organic solvent is 100: 10, and the time of dropping is 0.5 hour, then continues to polymerize after 3 hours and obtains the organic solvent solution C of copolymer; Add water and sodium hydroxide to solution C and stir evenly, wherein the mass ratio of solution C, water and sodium hydroxide is 100:80:80, then distill off the organic solvent and water to obtain an anionic water-soluble copolymer or solution C The organic solvent is directly distilled off to obtain a copolymer, and water and ammonia are added to the copolymer, wherein the mass ratio of the copolymer, water and ammonia is 100:80:80; then the water is distilled off to...

Embodiment 2

[0008] Embodiment 2: methacrylic acid and butyl acrylate are mixed homogeneously by the mass ratio of 1: 0.5 to make solution A; Solution A and benzoyl peroxide are mixed homogeneously by the mass ratio of 100: 0.1 to obtain solution B, then in Add solution B dropwise to the organic solvent ethyl formate at 70°C, wherein the mass ratio of solution B to the organic solvent is 100:100, the dropwise addition time is 1 hour, and then continue to polymerize for 2.5 hours to obtain the organic solvent solution of the copolymer C; add water and potassium hydroxide to solution C and stir evenly, wherein the mass ratio of solution C, water and potassium hydroxide is 100:200:40, then distill off the organic solvent and water to obtain an anionic water-soluble copolymer or The solution C is directly distilled to remove the organic solvent to obtain a copolymer, and water and sodium carbonate are added to the copolymer, wherein the mass ratio of the copolymer, water and sodium carbonate is...

Embodiment 3

[0009] Example 3: Mix acrylic acid and styrene at a mass ratio of 1:1 to obtain solution A; solution A and azobisisobutyronitrile are mixed at a mass ratio of 100:1 to obtain solution B, and then at 80 ° C The solution B is added dropwise in the organic solvent ethyl acetate, wherein the mass ratio of the solution B and the organic solvent is 100:500, the dropping time is 1.5 hours, and then the organic solvent solution C of the copolymer is obtained after continuing to polymerize for 2 hours; Add water and sodium bicarbonate to solution C and stir evenly, wherein the mass ratio of solution C, water and sodium bicarbonate is 100:500:10, then distill off the organic solvent and water to obtain an anionic water-soluble copolymer or the solution C directly distills off the organic solvent to obtain a copolymer, adds water and trimethylamine to the copolymer, wherein the mass ratio of the copolymer, water and trimethylamine is 100:500:30; then distills off the water to obtain an an...

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PUM

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Abstract

The present invention discloses preparation process of anionic macromolecule / cationic micromolecule complex for emulsion polymerization. Water soluble anionic copolymer is first obtained through solvent polymerization and then compounded with proper amount of cationic surfactant to obtain the anionic macromolecule / cationic micromolecule complex. Owing to the lower mobility of macromolecule and the powerful electrostatic action between the anionic macromolecule and the cationic micromolecule, the complex has low mobility and the micellar structure similar to that of the micromolecule emulsifier, so that the complex has high solubilizing property and polymerization stability of the polymerized monomer and capacity of raising the surface performance of the emulsion coating and the interface performance of the base material.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, and in particular relates to a method for preparing an anion macromolecule / cation small molecule complex for emulsion polymerization. Background technique [0002] Due to the advantages of low viscosity, fast polymerization, high relative molecular weight, low reaction temperature, and environmental friendliness, emulsion polymerization has been widely used, making many polymers exist in the form of emulsions. At present, the small-molecule emulsifiers in emulsion products are all adsorbed on the latex particles in the form of physical adsorption. This adsorption method makes the small-molecule emulsifier molecules easily desorbed from the surface of latex particles, making the emulsion mechanically stable and stable. The high and low temperature stability is reduced, and the small molecule emulsifier molecules are very easy to migrate from the interior of the emulsion coating to the coating surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/24C08F220/18C08F212/08C08F4/04C08F4/34C08K5/17C08L33/02
Inventor 沈一丁李刚辉费贵强李小瑞王海花
Owner SHAANXI UNIV OF SCI & TECH