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Environment-friendly fluorinated polyurethane-polyacrylate emulsion and preparation method thereof

A polyacrylate emulsion and acrylate technology, applied in the field of polymer chemistry, can solve problems such as poor stability, pollution, and unfavorable application performance of fluorine-containing emulsion products, and achieve the effects of improving water resistance, improving surface properties, and eliminating adverse effects

Active Publication Date: 2015-07-01
广东拓普合成科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above three preparation methods all make the final fluorine-containing emulsion contain conventional emulsifiers or (and) organic solvents, which is unfavorable to the application performance of fluorine-containing emulsion products, pollutes the environment to a certain extent, and has poor stability.

Method used

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  • Environment-friendly fluorinated polyurethane-polyacrylate emulsion and preparation method thereof
  • Environment-friendly fluorinated polyurethane-polyacrylate emulsion and preparation method thereof
  • Environment-friendly fluorinated polyurethane-polyacrylate emulsion and preparation method thereof

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preparation example Construction

[0031] A kind of preparation method of organic solvent-free fluorine-containing polyurethane-polyacrylate emulsion of the present invention comprises the following steps:

[0032] (1) Mix 5-10 parts of vinyl monomer, 0.5-2.5 parts of fluorine-containing methacrylate or fluorine-containing acrylate to prepare solution A;

[0033] (2) Add 1.5 to 2 parts of polyols, 7 to 9 parts of diisocyanate compounds, 1 to 2 parts of anionic hydrophilic chain extenders and 0 to 0.095 parts of catalysts in solution A, the reaction temperature is 70 to 85 °C, and the reaction time is Obtain polyurethane prepolymer solution B after 2~4 hours;

[0034] (3) Then, add 1 to 4 parts of hydrophilic vinyl monomer to solution B for capping, react for 0.5 to 2 hours, then cool the system temperature to 30 to 50°C, and then add 0.8 to 1.9 parts of organic Alkali, neutralize for 20 to 30 minutes, then add 60 to 100 parts of small molecule post-chain extender aqueous solution with a concentration of 0.5% t...

Embodiment 1

[0038] Mix 6 parts of methyl methacrylate, 4 parts of butyl acrylate, and 2.5 parts of perfluorooctyl ethyl acrylate to prepare solution A; add 1.5 parts of polycaprolactone diol, 7 parts of iso Phorne diisocyanate compound, 1.5 parts of anionic hydrophilic chain extender dimethylol butyric acid and 0.05 part of catalyst dibutyltin dilaurate, the reaction temperature is 70 ° C, and the reaction time is 4 hours to obtain polyurethane prepolymer solution B; Then, add 1 part of hydrophilic vinyl monomer hydroxyethyl acrylate to solution B for capping, react for 1 hour, then cool the system temperature to 30°C, then add 1.4 parts of organic base triethylamine to neutralize React for 30 minutes, then add 60 parts of sodium ethylenediaminoethanesulfonate aqueous solution with a concentration of 1%, and disperse with high-speed stirring for 30 minutes to obtain polyurethane dispersion C; add water-soluble initiator ammonium persulfate to dispersion C, and disperse The mass ratio of b...

Embodiment 2

[0040]Mix 5 parts of methyl acrylate, 4.5 parts of ethyl methacrylate, and 2 parts of dodecafluoroheptyl acrylate to prepare solution A; add 2 parts of polyhexamethylene adipate, 9 parts of toluene di Isocyanate, 2 parts of anionic hydrophilic chain extender dimethylol propionic acid and 0.095 parts of catalyst dibutyltin diacetate, the reaction temperature is 75 ° C, and the reaction time is 3 hours to obtain polyurethane prepolymer solution B; then, in solution B Add 4 parts of hydrophilic vinyl monomer hydroxyethyl methacrylate for capping, react for 0.5 hours, then cool the system temperature to 35°C, then add 1.9 parts of organic base trimethylamine, neutralize for 30 minutes, and then Adding 100 parts of sodium ethylenediamine di-o-phenyl acetate aqueous solution with a concentration of 1.5%, stirring and dispersing at a high speed for 40 minutes, obtained polyurethane dispersion C; adding water-soluble initiator potassium persulfate to dispersion C, dispersion C and pers...

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Abstract

The invention discloses an environment-friendly fluorinated polyurethane-polyacrylate emulsion and a preparation method thereof. The preparation method comprises the following steps: polymerizing diisocyanate, dimethylolpropionic acid, a functional monomer and an anionic hydrophilic chain extender under the presence of a catalyst so as to obtain an isocyanate-terminated double-bond prepolymer; neutralizing with alkali and adding the water solution of a hydrophilic small-molecule chain extender for dispersing, and further initiating a fluorinated monomer and an acrylic monomer under the effect of a water-soluble initiator so as to obtain the environment-friendly fluorinated polyurethane-polyacrylate emulsion. The emulsion adopts a self-emulsifying method, and is subject to a post-chain extension method and free from any organic solvent or small-molecule emulsifier; and the emulsion is good in storage stability, and by introducing fluorine atoms, the water resistance and the solvent resistance of waterborne polyurethane are effectively improved. The emulsion is applicable to a waterborne coating, and a prepared coating film has the properties of excellent water and oil-proofing performance, heat resistance, being non-toxic, safe and highly glazed, and the like.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, and in particular relates to an environment-friendly fluorine-containing polyurethane-polyacrylate emulsion and a preparation method thereof. Background technique [0002] Organic fluorine resins have good heat resistance, temperature change resistance, and aging resistance, and the surface tension of the formed coating film is small, and water and other dirt are not easy to adhere to. Therefore, the research on introducing organic fluorine into water-based resins is the current research. One of the hotspots, the preparation methods of the currently prepared organic fluorine polyurethane-polyacrylate emulsion mainly include the following: (1) under the action of conventional emulsifiers, fluorine-containing monomers, acrylic monomers and polyurethane molecular chains with double bonds (2) Copolymerization of fluorine-containing monomers, acrylic monomers and polyurethane molecular chains with dou...

Claims

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Application Information

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IPC IPC(8): C08F299/06C08G18/66C08G18/67C08G18/62C08G18/28C08G18/12C09D175/06C09D175/08
Inventor 赖小娟付建萍王磊宫米娜
Owner 广东拓普合成科技股份有限公司
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