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Method for preparing chlorotrifluoroethylene-ethylene copolymer

A technology of chlorotrifluoroethylene and ethylene copolymer, which can be used in coatings, anti-corrosion coatings, etc., can solve problems such as limitations in promotion and application, increased cost of copolymers, and inability to fully express the characteristics of ethylene-chlorotrifluoroethylene copolymers. To achieve the effect of favorable mass transfer, shortened reaction time and ideal molecular structure

Active Publication Date: 2012-07-18
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 an aqueous solution of Haisen® FN-6810 (product of Shijiazhuang Haisen Chemical Co., Ltd.) surfactant with a mass concentration of 12% to 50 parts by weight of deoxidized deionized water, and 0.05 parts by weight of an ammonium persulfate initiator, Fully dissolve and mix uniformly to obtain a mixed solution;

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

[0026] (3) Turn on stirring at a speed of 500rpm.;

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

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

Embodiment 2

[0030] (1) Add 0.1 part by weight of an aqueous solution of a surfactant with a mass concentration of 10% and 0.05 part by weight of an ammonium persulfate initiator to 80 parts by weight of deoxidized 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) Add the above mixed solution into the reaction kettle, seal it tightly, 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, the speed is 50rpm.;

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

[0034] (5) After the reaction, the pressure of the kettle was reduced to -0.01MPa, the temperature of the kettle ...

Embodiment 3

[0036] (1) Add 0.2 parts by weight of an aqueous solution of a surfactant with a mass concentration of 15% and 2 parts by weight of an ammonium persulfate initiator to 60 parts by weight of deoxidized deionized water, fully dissolve and mix uniformly to obtain a mixed solution; the surfactant Composed of 50% by mass of Haisen® FN-6810 and 50% of fatty alcohol polyoxyethylene ether;

[0037] (2) Add the above mixed solution into the reaction kettle, seal it tightly, 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, the speed is 800rpm.;

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

[0040] (5) After the reaction, the pressure of the kettle was reduced to -0.01MPa, the temperature of the kettle was kept at 85°C, and the stirring was continued for 30 minut...

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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 chlorotrifluoroethylene-ethylene copolymer. Background technique [0002] Chlorotrifluoroethylene-ethylene copolymer (F30) is an alternating copolymer synthesized from chlorotrifluoroethylene and ethylene, which has good mechanical properties, excellent weather resistance, excellent corrosion resistance and extremely low permeability. F30 is often used as a high-end product in environments where other materials cannot be used. Its safe use temperature is -100~150°C, and it can be used as anti-ultraviolet paint and coating in the construction industry. F30 is one of the polymers with the best chemical resistance known so far. So far, no solvent can dissolve it or cause stress cracking below 120°C. It has irreplaceable performance in the field of heavy anticorrosion and is often used as Chemical anti-corrosion coatings, sealants and gaskets for important components in petroleum, automobile and aviation i...

Claims

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Application Information

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Patent Type & Authority Applications(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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