Synthesis method of polydifluorodichloroethylene

A polydifluoroethylene, synthetic method technology, applied in the field of synthesis, can solve the problems of poor mechanical properties and resilience properties, difficulties in forming and secondary processing, large linear expansion coefficient, etc., and achieve mechanical properties and resilience properties Good, small linear expansion coefficient, and improved strength

Inactive Publication Date: 2016-05-25
CHANGZHOU LANXU CHEM CO LTD
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  • Abstract
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  • Application Information

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Benefits of technology

This patented method simplifies the production processes while reducing their coefficients for better performance compared with existing methods that require multiple stages or complicated processing techniques. It also improves its overall quality due to improved physical characteristics such as flexibility and durability over time.

Problems solved by technology

This patented technical problem addressed by the inventors relates to improving the physical characteristics or functionality of certain types of fluorescent dyes that can be easily processed into various forms without losing their effectiveness due to decomposition during storage over time.

Method used

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  • Synthesis method of polydifluorodichloroethylene
  • Synthesis method of polydifluorodichloroethylene

Examples

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example 1

[0018] First measure 100mL of chloroform, put it into a sealed container, feed fluorine gas from the bottom of the sealed container, control the rate of fluorine gas introduction to 23mL / s, and stop feeding fluorine gas when the fluorine gas content in the sealed container is 78%. , control the temperature in the airtight container to 62°C, fluorinate for 2 hours to obtain chlorofluoromethane; then add 3g of magnesium fluoride to the fluorodichloromethane obtained above, and stir at 80r / min for 20min while stirring Add 4mL of anhydrous hydrofluoric acid dropwise to it at a rate of 2 drops / s. After the dropwise addition, react at a temperature of 50°C for 3h to obtain difluorodichloroethane; Put ethane into the reaction kettle, add 20mL trifluoroacetic acid and 15mL antimony pentachloride to the reaction kettle at the same time, stir to make it fully mixed, and then feed hexafluoropropylene gas into it, and control the feeding rate to 20mL / s, when the hexafluoropropylene gas c...

example 2

[0020] First measure 110mL of chloroform, put it into a sealed container, feed fluorine gas from the bottom of the sealed container, control the rate of fluorine gas introduction to 24mL / s, and stop feeding fluorine gas when the fluorine gas content in the sealed container is 80%. , control the temperature in the sealed container at 64°C, and perform fluorination reaction for 3 hours to obtain chlorofluoromethane; then add 4 g of magnesium fluoride to the chlorofluoromethane obtained above, and stir at 80 r / min for 25 minutes while stirring Add 5 mL of anhydrous hydrofluoric acid dropwise to it at a rate of 3 drops / s. After the dropwise addition, react at a temperature of 55°C for 4 hours to obtain difluorodichloroethane; Put ethane into the reaction kettle, add 23mL trifluoroacetic acid and 18mL antimony pentachloride to the reaction kettle at the same time, stir to make it fully mixed, and then feed hexafluoropropylene gas into it, and control the feeding rate to 21mL / s, wh...

example 3

[0022] First measure 120mL of chloroform, put it into a sealed container, feed fluorine gas from the bottom of the sealed container, control the rate of fluorine gas introduction to 25mL / s, and stop feeding fluorine gas when the fluorine gas content in the sealed container is 82%. , control the temperature in the sealed container to 66°C, and perform fluorination reaction for 3 hours to obtain chlorofluoromethane; then add 5 g of magnesium fluoride to the chlorofluoromethane obtained above, and stir at 80 r / min for 30 min while stirring Add 6mL of anhydrous hydrofluoric acid dropwise to it at a rate of 3 drops / s. After the dropwise addition, react at a temperature of 60°C for 4 hours to obtain difluorodichloroethane; Put ethane into the reaction kettle, add 25mL trifluoroacetic acid and 20mL antimony pentachloride to the reaction kettle at the same time, stir to make it fully mixed, and then feed hexafluoropropylene gas into it, and control the feeding rate to 23mL / s, when th...

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Abstract

The invention discloses a synthesis method of polydifluorodichloroethylene, belonging to the technical field of synthesis. The method comprises the following steps: by using trichloromethane as a raw material, introducing fluorine gas for fluorination, carrying out fluorination again under the actions of added magnesium fluoride and anhydrous hydrofluoric acid, putting the reaction product in a reaction kettle, simultaneously adding trifluoroacetic acid and antimony pentachloride, introducing hexafluoropropylene gas, reacting to obtain difluorodichloroethylene, taking out the difluorodichloroethylene, putting the difluorodichloroethylene into an enamel polymerization still, and carrying out polymerization reaction by using potassium permanganate as a catalyst, potassium persulfate as an initiator and sodium fluosilicate as an activator, thereby obtaining the polydifluorodichloroethylene. The method has the advantage of simple synthesis steps. The obtained product has low linear expansion coefficient (lowered by 25.8% or above), and is easy for formation and secondary processing. The product has the advantages of favorable mechanical properties and favorable resilience, and the strength is enhanced by 50% or above.

Description

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Claims

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Application Information

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Owner CHANGZHOU LANXU CHEM CO LTD
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