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Aqueous emulsion type fluorine containing water repellent oil repellent agent and its preparation method

A water-and-oil-repellent, water-emulsion-type technology is applied in the field of water-emulsion-containing fluorine-containing water and oil-repellent and its preparation to achieve the effects of excellent water and oil repellency, fast polymerization speed and low polymerization temperature

Inactive Publication Date: 2004-05-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of ultrasonic technology to the preparation of water and oil repellent emulsions with high fluorine content has not been reported yet.

Method used

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  • Aqueous emulsion type fluorine containing water repellent oil repellent agent and its preparation method
  • Aqueous emulsion type fluorine containing water repellent oil repellent agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Mix the following ingredients in a 200 ml beaker: 30 g perfluoroalkylethyl methacrylate, 10 g laurate acrylate, 8 g butyl methacrylate, 1 g N-methylolacrylamide, 1 g hydroxypropyl methacrylate, Dodecyl mercaptan 0.25g, sodium lauryl sulfate 1.5g, alkylphenol polyoxyethylene ether-10 0.5g, deionized water 170g, placed in SK1200H type ultrasonic cleaner for pre-emulsification for 1 hour, to obtain stable water dispersion. Add the pre-emulsion to a glass reactor equipped with a stirrer, a thermometer and a condenser, then add 0.3 g of sodium bicarbonate, 0.3 g of potassium persulfate, 0.15 g of sodium bisulfite, and 0.025 g of copper sulfate, and pass through nitrogen to remove oxygen. Stir and heat, and the temperature of the water bath is raised to 50°C. After 3 minutes, opalescence appears, and the reaction is continued for 5 hours to obtain about 223 g of latex with a solid content of 23.5%.

Embodiment 2

[0059] Mix the following ingredients: 35 g perfluoroalkylethyl acrylate, 13 g stearyl acrylate, 1 g N-methylolacrylamide, 1 g hydroxyethyl acrylate, 0.25 g dodecyl mercaptan, 0.25 g octadecyltrimethyl 1.5 g of ammonium chloride and 160 g of deionized water were placed in a USC-102 ultrasonic cleaner for pre-emulsification for 0.5 hours to obtain a stable aqueous dispersion. Add the pre-emulsion into a glass reactor equipped with a stirrer, a thermometer and a condenser, then add 0.3 g of sodium bicarbonate, 0.3 g of ammonium persulfate, and 0.15 g of sodium bisulfite, pass nitrogen to deoxygenate, stir and heat to a water bath at 45 ℃ for 5 hours to obtain about 183 g of latex with a solid content of 28.6%.

Embodiment 3～8

[0061] Prepare fluorine-containing emulsion substantially according to the method for embodiment 1 or 2, and its monomer composition formula is listed in table 1:

[0062] The monomer consumption (parts by weight) in the embodiment 3-8 of table 1

[0063] Monomer 3 4 5 6 7 8

[0064] Perfluoroalkylethyl acrylate 70 80 50 - - -

[0065] Perfluoroalkylethyl methacrylate - - - 60 70 60

[0066] Lauryl Acrylate 20 - 30 25 - 30

[0067] Acrylic stearate 20 - - 30 -

[0068] Vinylidene chloride 10 0 20 15 0 10

[0069] 2-Hydroxyethyl acrylate - 2 - - 2

[0070] 3-Hydroxypropyl methacrylate 2 - - 2 - -

[0071] N-Hydroxyacrylamide 2 2 2 2 2 2

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Abstract

An aqueous emulsion type fluoric hydrophobing-oleophobing agent is prepared from monomer, emulsifier and water through ultrasonic treating and triggered polymerizing. Its advantages are high hydrophobicity and oleophobicity, low cost, low polymerizing temp and high polymerizing speed.

Description

technical field [0001] The invention relates to an organic solvent-free water-emulsion type fluorine-containing water and oil repellent agent and a preparation method thereof. Background technique [0002] Fluorine-containing polymers have many excellent properties, such as excellent water and oil resistance, aging resistance, high temperature resistance, extremely low surface tension and chemical stability, etc. It is well known that the copolymer of perfluoroalkylethyl (meth)acrylate is used in the design of hydrophobic and oil-repellent finishing agents of fabrics. From the consideration of environment and safety, such finishing agents have been dissolved in organic Developed from solvents to current water-based dispersions. [0003] Since the (meth)acrylates containing perfluoroalkyl (abbreviated as Rf) groups are insoluble in water, and in order to obtain good water and oil repellency, a higher fluorine content is often required in the copolymer, therefore, Its good d...

Claims

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Application Information

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IPC IPC(8): C08F220/24D06M15/263
Inventor 韩哲文李欣欣王艳
Owner EAST CHINA UNIV OF SCI & TECH
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