Preparation method of chlorotrifluoroethylene-ethylene copolymer

A technology of chlorotrifluoroethylene and ethylene copolymer, which can be applied to coatings, anti-corrosion coatings, etc., can solve the problems of inability to fully express the characteristics of ethylene-chlorotrifluoroethylene copolymer, increase in cost of copolymer, and restrictions on promotion and application. Achieve ideal molecular structure, shorten the reaction time, and facilitate mass transfer.

Active Publication Date: 2015-12-09
河北海森化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the third monomer leads to a substantial increase in the cost of the copolymer, and its promotion and application are severely limited; at the same time, the formed polymer cannot fully express the characteristics of ethylene-chlorotrifluoroethylene copolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 0.3 parts by weight of Haisen? FN-6810 (product of Shijiazhuang Haisen Chemical Co., Ltd.) surfactant solution and 0.05 parts by weight of ammonium persulfate initiator to 50 parts by weight of deoxygenated deionized water. Fully dissolve and mix evenly to obtain a mixed solution;

[0025] (2) Put the above mixed solution into the reaction kettle, seal it, replace the air in the kettle with nitrogen, repeat three times to completely replace the air in the kettle;

[0026] (3) Turn on the stirring at 500rpm.;

[0027] (4) Raise the temperature of the reactor to 40°C, feed ethylene and chlorotrifluoroethylene monomers at a molar ratio of 1:1, and react for 6 hours under the conditions of 0.3~2.0MPa and 40°C;

[0028] (5) After the reaction, the pressure of the kettle is reduced to -0.01MPa, the temperature of the kettle is kept at 40°C, and the stirring is continued for 30 minutes to obtain the trifluorochloroethylene-ethylene copolymer emulsion.

Embodiment 2

[0030] (1) Add 0.1 parts by weight of 10% by weight surfactant aqueous solution and 0.05 parts by weight of ammonium persulfate initiator to 80 parts by weight of deoxygenated deionized water, fully dissolve and mix uniformly, to obtain a mixed solution; the surfactant It is composed of 20% by mass of Haisen FA-6812 (product of Shijiazhuang Haisen Chemical Co., Ltd.) and 80% of isomeric alcohol polyoxyethylene ether;

[0031] (2) Put the above mixed solution into the reaction kettle, seal it, replace the air in the kettle with nitrogen, repeat three times to completely replace the air in the kettle;

[0032] (3) Turn on the stirring at 50rpm.;

[0033] (4) Raise the temperature of the reactor to 50°C, feed ethylene and chlorotrifluoroethylene monomers at a molar ratio of 1:1, and react for 7 hours under the conditions of 0.3~2.0MPa and 50°C;

[0034] (5) After the reaction, the pressure of the kettle is reduced to -0.01 MPa, the temperature of the kettle is maintained at 50°C, and the...

Embodiment 3

[0036] (1) Add 0.2 parts by weight of 15% by weight surfactant aqueous solution and 2 parts by weight of ammonium persulfate initiator to 60 parts by weight of deoxygenated deionized water, fully dissolve and mix uniformly to obtain a mixed solution; the surfactant It is composed of 50% Haisen? FN-6810 and 50% fatty alcohol polyoxyethylene ether;

[0037] (2) Put the above mixed solution into the reaction kettle, seal it, replace the air in the kettle with nitrogen, repeat three times to completely replace the air in the kettle;

[0038] (3) Turn on the stirring at 800rpm.;

[0039] (4) Raise the temperature of the reactor to 85°C, feed ethylene and chlorotrifluoroethylene monomers at a molar ratio of 1:1, and react for 8 hours under the conditions of 0.3~2.0MPa and 85°C;

[0040] (5) After the reaction is over, the pressure of the kettle is reduced to -0.01MPa, the temperature of the kettle is kept at 85°C, and the stirring is continued for 30 minutes to obtain a trifluorochloroethyl...

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Abstract

The invention relates to a method for preparing a chlorotrifluoroethylene-ethylene copolymer. The method comprises the following steps of: adding 0.1 to 0.3 weight part of 10 to 15 mass percent aqueous solution of surfactant and 0.05 to 2 weight parts of ammonium persulfate initiator into 50 to 80 weight parts of deoxidized deionized water, fully dissolving, mixing uniformly, and performing polymerization reaction under certain conditions. The surfactant consisting of a fluorine surfactant and a non-fluorine surfactant is used as an emulsifying agent, wherein the fluorine surfactant contains a part of hydrocarbon chain and has the advantages of high activity, low consumption, degradability and the like. Because chlorofluorocarbon or perfluoroalkyl acid and salt thereof are not used, the defect that the conventional solvent or emulsifying agent has serious harm to human body and environment is overcome. The method is short in reaction time and high in yield, and the obtained copolymer has excellent performance.

Description

Technical field [0001] The invention relates to a preparation method of a trifluorochloroethylene-ethylene copolymer. Background technique [0002] Trifluorochloroethylene-ethylene copolymer (F30) is an alternating copolymer synthesized from chlorotrifluoroethylene and ethylene. It has good mechanical properties, excellent weather resistance, excellent corrosion resistance and very low permeability. F30 is often used as a high-end product and used in environments where other materials cannot be used. Its safe use temperature is -100~150℃ and can be used as anti-ultraviolet paint and coating in the construction industry. F30 is one of the most chemically resistant polymers currently known. So far, no solvent can dissolve it or cause stress cracking below 120°C. It has irreplaceable performance in the field of heavy corrosion protection and is often used as Chemical anticorrosive coatings, sealants and gaskets for important components in the petroleum, automotive and aviation ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F210/02C08F214/24C08F2/26C08F2/30C09D123/08C09D127/12C09D5/08
Inventor 宋学娟马立功
Owner 河北海森化工科技有限公司
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