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Phosphate surfactant and method for preparing trifluorochlor oethylene polymer

A technology of chlorotrifluoroethylene and surfactants, which is applied in the field of preparation of surfactants and fluorine-containing polymer materials, can solve problems such as great harm to the body, environmental pollution, and high toxicity of fluorine-containing emulsifiers, and achieves simple operation and high yield rate, overcoming serious effects of bioaccumulation

Inactive Publication Date: 2011-08-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems that the perfluoroalkanoic acid containing perfluoro long carbon chain or its salt fluorinated emulsifier used in the process of preparing chlorotrifluoroethylene polymer by the above-mentioned aqueous emulsion polymerization method has high toxicity, great harm to the body, and serious environmental pollution, The invention provides a phosphate ester surfactant which contains a part of carbon and hydrogen chains in the fluorophilic segment and can be used as an emulsifier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 166g of dodecafluoroheptanol (0.5mol) and 35.5g (0.25mol) of phosphorus pentoxide into a 250ml round bottom flask, mix at room temperature, stir and heat to 80°C, and react for about 1h. Then, 3.12 g of distilled water was added, stirring was continued at 80° C., and stopped after 15 minutes. Tan, mushy. Take the above crude product (all) in a 1000ml flask, add 700g of benzene, heat to boil and dissolve. After cooling, a brownish-red solid was precipitated in the form of scales. The solid was collected by suction filtration. Take the above solid in a flask, add 600g of toluene, and boil to dissolve. Cool to crystallize, and collect the solid by suction filtration. Dissolve the above solid in about 530 g of ether, add 5 g of activated carbon, boil for about 15 minutes, and filter. The filtrate is yellow and transparent, clear. Ether was distilled off, about 400g of benzene was added, and dissolved by boiling. Cooling and crystallization, suction filtration and...

Embodiment 2

[0052] React by the method of embodiment 1, difference is that the sodium hydroxide / ethanol solution solution in the saponification reaction is replaced with excessive ammoniacal liquor. After the reaction, diammonium monoester of dodecafluoroheptyl phosphate is obtained, that is, emulsifier 3.

Embodiment 3

[0054] React according to the method of Example 1, the difference is that dodecafluoroheptyl alcohol is replaced by ethylene glycol monododecafluoroheptyl ether, and finally dodecafluoroheptyloxyethyl phosphate monoester disodium is obtained, that is, emulsifier 2 .

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PUM

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Abstract

The invention discloses a phosphate surfactant, of which the chemical formula is: H-(CF2)m-CH2-O-(CH2CH2O)n-PO(OM)2, wherein m is equal to 2, 4, 6 or 8, n is equal to 0 or 1, and M is NH4+ or Na+. The invention also discloses a method for preparing trifluorochlor oethylene polymer emulsion or solid with the phosphate surfactant as an emulsifier. The surfactant can be used for emulsion polymerization of fluoride-containing monomer. Used as the emulsifier, the surfactant can achieve a high polymerization rate, good dispersion stability, high yield, excellent copolymerization performance and / or multiple particle sizes (including small particle size). Besides, the method can realize polymerization by only using conventional equipment, is easy and convenient to operate and has a low cost, and does not cause environmental pollution during and after reaction.

Description

technical field [0001] The present invention relates to a kind of phosphoric acid ester surfactant and its application, be specifically related to a kind of phosphoric acid ester surfactant and use it to prepare the aqueous emulsion polymerization method of trifluoroethylene polymer and the method for preparing trifluoroethylene polymer solid, The invention belongs to the technical field of preparation of surfactants and fluorine-containing polymer materials. Background technique [0002] Polychlorotrifluoroethylene (PCTFE) is the earliest developed and commercially produced thermoplastic fluoroplastic. In 1937, I.G.Farbenindustrie of Germany first reported the preparation of PCTFE. In 1946, the United States officially built a PCTFE production facility and put it into production for the nuclear industry. In 1957, the Minnesota Mining Machinery Company (3M) began to sell PCTFE in large quantities under the "Kel-F" trademark. [0003] PCTFE is a thermoplastic with high add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/24C08F114/24
Inventor 张书香王旗威耿兵张炉青
Owner UNIV OF JINAN
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