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Preparation of water dispersed fine emulsion of fluorine acrelate copolymer for anti-oil and anti-water agent

A technology of perfluoroacrylate and water-repellent agent, which is applied in the field of preparation of water-dispersed miniemulsion of perfluoroacrylate copolymer for oil-repellent and water-repellent agent. Fast, low-dose effect

Inactive Publication Date: 2005-05-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A notable feature of miniemulsion polymerization is the addition of co-emulsifiers, such as cetane, cetyl alcohol, etc., to achieve the purpose of monomer fine emulsification, but the existence of co-emulsifiers will still affect the performance of emulsion products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The perfluoroalkyl acrylate (perfluorocarbon number is 6, 8, 10) 12g, lauryl methacrylate 4g, dodecyl mercaptan 0.1g, potassium persulfate 0.1g, styrene 6g, acrylamide 0.2g, 0.3g of dodecyl-3-methylammonium bromide, 0.2g of OP-9 and 45g of deionized water were mixed, stirred and pre-emulsified at 40°C for 10 minutes, and then the pre-emulsion was ultrasonically fined at this temperature After 5 minutes of emulsification, the average particle size of the monomer miniemulsion was 121nm.

[0023] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring blade, a thermometer, a reflux tube, and a nitrogen venting device. The gas in the flask was replaced with nitrogen. The temperature was raised to 65°C with stirring, and the polymerization was initiated for 6 hours to obtain a blue light. The translucent emulsion has an average particle size of 117nm, a molecular weight of 110,000, a solid content of 32%, and a monomer conversion rate of 97%.

Embodiment 2

[0025] Combine 10 g of perfluoroalkyl acrylate (perfluorocarbon number 6, 8, 10), 6 g of cetyl methacrylate, 0.1 g of dodecyl mercaptan, 0.1 g of azobisacetonitrile, and benzene Mix 4g of ethylene, 0.2g of acrylic acid, 0.21g of cetyl-3-methylammonium bromide, 0.24g of NP-40 and 45g of deionized water, stir and pre-emulsify at 40℃ for 10 minutes, and then at this temperature The pre-emulsion was subjected to ultrasonic fine emulsification for 5 minutes, and the average particle size of the monomer miniemulsion was 128 nm.

[0026] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring blade, a thermometer, a reflux tube, and a nitrogen venting device. The gas in the flask was replaced with nitrogen, and the temperature was raised to 75°C under stirring. The polymerization was initiated for 6 hours to obtain a blue light. The translucent emulsion has an average particle size of 125nm and a molecular weight of 100,000, the solid content of the emulsion i...

Embodiment 3

[0028]Combine 8 g of perfluoroalkyl acrylate (perfluorocarbon number 6, 8, 10), 6 g of stearyl methacrylate, 0.1 g of dodecyl mercaptan, 0.12 g of ammonium persulfate, and methyl methacrylate. 4g of ester, 0.3g of acrylamide, 0.18g of dodecyl-3-methylammonium bromide, 0.36g of OP-10 and 40g of deionized water were mixed, stirred and pre-emulsified at 40℃ for 10 minutes, and then at this temperature The pre-emulsion was subjected to ultrasonic fine emulsification for 3 minutes, and the average particle size of the monomer fine emulsion was 116 nm.

[0029] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring blade, a thermometer, a reflux tube, and a nitrogen venting device. The gas in the flask was replaced with nitrogen, and the temperature was raised to 70°C under stirring. The polymerization was initiated for 6 hours to obtain a blue light. The translucent emulsion has an average particle size of 113nm, a molecular weight of 98,000, a solid conten...

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Abstract

Aqueous dispersible fine emulsion of complete acrylic ester copolymer as oil- and water-resisting agent is prepared by: preparing complete alkyl copolymerized monomer fine emulsion dispersed uniformly, and then polymerizing without organic solvent and emulsifying to aid it. It is stable for restore or dilution, and can be used for substrate materials of fabrics, leathers or paper as waterproof and oil-proof finishing agent.

Description

Technical field [0001] The invention relates to a preparation method of a perfluoroacrylate copolymer water-dispersed miniemulsion for oil and water repellent agents. Background technique [0002] So far, the surface energy characteristics of perfluoroalkyl acrylate copolymers can be used to give fabrics, leather, paper and other substrates excellent water-repellent, oil-repellent and soil-repellent finishing effects. Perfluoroalkyl copolymer systems include solution type and emulsion type. In recent years, considering safety issues and environmental issues, this type of perfluoroalkyl copolymer oil and water resistant finishing agents are mostly water-dispersed emulsions. [0003] In the preparation of aqueous dispersions of perfluoroalkyl copolymers, comonomers such as perfluoroalkyl acrylates are generally obtained in the form of emulsion polymerization directly in the aqueous dispersion. The conventional emulsion polymerization process requires monomers to pass through the wa...

Claims

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Application Information

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IPC IPC(8): C08F2/30C08F2/38C08F4/04C08F20/24
Inventor 詹晓力张庆华陈丰秋
Owner ZHEJIANG UNIV
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