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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, which is applied in the field of preparation of water-dispersed miniemulsion of perfluoroacrylate copolymer for oil and water repellent, can solve problems affecting the performance of emulsion products, and achieve safe use, particle size Uniform distribution and less dosage effect

Inactive Publication Date: 2007-02-14
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] Perfluoroalkyl acrylate (6, 8, 10 perfluorocarbons) 12g, lauryl methacrylate 4g, dodecyl mercaptan 0.1g, potassium persulfate 0.1g, styrene 6g, acrylamide 0.2 g. Mix 0.3g of dodecyl-3-methylammonium bromide, 0.2g of OP-9 and 45g of deionized water, stir and pre-emulsify at 40°C for 10 minutes, and then ultrasonically finely emulsify the pre-emulsion at this temperature After 5 minutes, the average particle size of the obtained monomer miniemulsion was 121 nm.

[0023] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring paddle, a thermometer, a reflux tube, and a nitrogen device, replace the gas in the bottle with nitrogen, raise the temperature to 65°C under stirring, and initiate polymerization for 6 hours to obtain a bluish light The semi-transparent emulsion, average particle diameter is 117nm, and molecular weight is 110000, and the solid content of emulsion is 32%, and monomer conversion rate is 97%.

Embodiment 2

[0025] Perfluoroalkyl acrylate (6, 8, 10 perfluorocarbons) 10g, cetyl methacrylate 6g, dodecyl mercaptan 0.1g, azobisisobutyronitrile 0.1g, benzene Mix 4g of ethylene, 0.2g of acrylic acid, 0.21g of hexadecyl-3-methylammonium bromide, 0.24g of NP-40 and 45g of deionized water, stir and pre-emulsify at 40°C for 10 minutes, and then Ultrasonic fine emulsification was performed on the pre-emulsion for 5 minutes, and the average particle size of the obtained monomer mini-emulsion was 128 nm.

[0026] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring paddle, a thermometer, a reflux tube, and a nitrogen device, replace the gas in the bottle with nitrogen, raise the temperature to 75°C under stirring, initiate polymerization for 6 hours, and obtain a bluish light The translucent emulsion has an average particle diameter of 125nm and a molecular weight of 100,000, a solid content of the emulsion of 30%, and a monomer conversion rate of 96%.

Embodiment 3

[0028]Perfluoroalkyl acrylate (perfluorocarbon number is 6, 8, 10) 8g, octadecyl methacrylate 6g, dodecyl mercaptan 0.1g, ammonium persulfate 0.12g, methyl methacrylate Mix 4g of ester, 0.3g of acrylamide, 0.18g of dodecyl-3-methylammonium bromide, 0.36g of OP-10 and 40g of deionized water, stir and pre-emulsify at 40°C for 10 minutes, and then The pre-emulsion was ultrasonically finely emulsified for 3 minutes, and the average particle size of the obtained monomer miniemulsion was 116 nm.

[0029] Then put the monomer emulsion in a 100ml four-neck flask equipped with a stirring paddle, a thermometer, a reflux tube, and a nitrogen device, replace the gas in the bottle with nitrogen, raise the temperature to 70°C under stirring, and initiate polymerization for 6 hours to obtain a bluish light The semi-transparent emulsion, the average particle size is 113nm, the molecular weight is 98000, the solid content of the emulsion is 30%, the monomer conversion rate is 95%.

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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 an oil and water repellent agent. Background technique [0002] So far, the surface energy properties of perfluoroalkyl acrylate copolymers can be used to give fabrics, leather, paper and other substrates excellent waterproof, oil-proof and antifouling finishing effects. Perfluoroalkyl copolymer systems include solution type and emulsion type In recent years, considering safety and environmental issues, this type of perfluoroalkyl copolymer oil and water repellent finishing agent is mostly water-dispersed emulsion type. [0003] In the preparation of perfluoroalkyl copolymer aqueous dispersions, comonomers such as perfluoroalkyl acrylates are generally obtained in the form of emulsion polymerization directly in aqueous dispersions. The conventional emulsion polymerization process requires monomers to pass through the water phase. Migrating f...

Claims

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Application Information

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