Preparation method for fluorine-contained emulsifier

A technology of emulsifiers and fluorine-containing solvents, applied in chemical instruments and methods, chemical/physical processes, dissolution, etc., can solve problems such as high risk and easy out-of-control production of fluorine-containing emulsifiers

Active Publication Date: 2010-02-17
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of fluorine-containing emulsifiers prepared by telomerization is easy to get out of control and is very dangerous

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A stainless steel reactor with a built-in ultraviolet lamp (wavelength 200nm) in a volume of 2L, with a reflux facility at -70°C; add perfluorodimethyl ether (solvent) that has been precooled to -30°C into the precooled reactor 0.5L; into the bottom of the reactor metered oxygen (O 2 ) 20L / h (standard state) and hexafluoropropylene (monomer) 2.5L / h (standard state) (purity 99.5%) mixed gas, keep the reaction phase at a temperature of about -45 ° C, maintain 8h, the bottom product take out. After the product was hydrolyzed in deionized water at 90°C for 6 hours, 565 g of the oil layer was obtained by static layering. After testing, the acid value of the product was 80.5 mgNaOH / g, and the peroxide content was 28 ppm. The product was formulated into an ammonium salt solution with a surface tension of 12.9mN / m.

Embodiment 2

[0064] A stainless steel reactor with a built-in ultraviolet lamp (wavelength 300nm) in a volume of 2L, with a reflux facility at -70°C; add 0.5L of hexafluoropropylene precooled to -40°C into the precooled reactor; The metered oxygen (O 2 ) 20L / h (standard state) and perfluoromethyl ethyl ether 2.5L / h (standard state) (purity 99.0%) mixed gas, keep the reaction phase at about -45 ℃ of temperature, maintain 8h, the bottom product take out. After the product was hydrolyzed in deionized water at 90°C for 6 hours, 580 g of the oil layer was obtained by static layering. After testing, the acid value of the product was 75.5 mgNaOH / g, and the peroxide content was 25 ppm. The product is formulated into an ammonium salt solution with a surface tension of 21.2mN / m.

Embodiment 3

[0066] A stainless steel reactor with a built-in ultraviolet lamp (wavelength 380nm) in a volume of 2L, with a reflux facility at -70°C; add 0.5L of hexafluoropropylene precooled to -40°C into the precooled reactor; The metered oxygen (O 2 ) 20L / h (standard state) and chlorotrifluoroethylene 2.5L / h (standard state) (purity 99.4%) mixed gas, keep the reaction phase at about -45 ℃ of temperature, maintain 8h, the bottom product is taken out. After the product was hydrolyzed in deionized water at 90°C for 6 hours, 572 g of the oil layer was obtained by static layering. After testing, the acid value of the product was 65.5 mgNaOH / g, and the peroxide content was 52 ppm. The product was formulated into an ammonium salt solution with a surface tension of 17.2mN / m.

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Abstract

The invention provides a preparation method for fluorine-contained emulsifier, comprising the steps: initiating by ultraviolet light with the wavelength of 100nm to 400nm at the temperature lower than-25DEG C; oxidizing and polymerizing a polymerizing monomer in fluorohydrocarbon compounds or a fluorine-contained solvent of a perfluoroether compound and hydrolyzing a photopolymerization product to obtain the fluorine-contained emulsifier. The preparation method has the advantages of less discharge of toxic and harmful matter in the synthesizing process, easy treatment, low production cost andsmall risk. The prepared emulsifier has strong surface activity and can be better applied for producing fluorine resin, fluorine rubber and the like.

Description

technical field [0001] The invention relates to a preparation method of a fluorine-containing emulsifier. Background technique [0002] Fluorosurfactant is a kind of surfactant with special properties that has been gradually commercialized in recent years. Different from ordinary surfactants, fluorine-containing surfactants mainly use perfluoroalkyl or perfluoroalkenyl or partially fluorinated alkyl as the hydrophobic part of the surfactant, and then introduce appropriate linking groups and hydrophilic groups. Fluorine-containing surfactants can be used as dispersants in the dispersion polymerization of various fluororesins. Fluorine-containing surfactants are used as dispersants in the emulsification and dispersion polymerization of fluorine-containing monomers such as tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride, hexafluoropropylene, and perfluoroalkyl vinyl ether. [0003] Since the 1950s, perfluorooctanoic acid (ammonium) (PFOA) is the most widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/42C09K23/42
Inventor 谢学端屈均柏荣张建新肖平刘斌张鸣杨旭仓胡显权
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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