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Preparation method of modified polytrifluorochloroethylene resin

A technology of polychlorotrifluoroethylene and a manufacturing method, which is applied in the field of polymer production, can solve the problems of easy generation of odor, inability to one-time molding, and high production cost, and achieve the effects of reducing odor and facilitating washing and drying.

Pending Publication Date: 2021-10-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing polytrifluorochloroethylene resin is easy to produce odor when dispersed in the medium after absorbing water, and the shapes of the prepared polymers are different, and it cannot be molded at one time. It needs to be re-granulated later, and the production cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of manufacture method of modified polytrifluorochloroethylene resin, comprises the steps:

[0022] Step 1: Weigh each component according to the following parts by weight: 100 parts of chlorotrifluoroethylene, 500 parts of high-purity water with a pH of 7.1, 50 parts of maleic anhydride modified ethylene-propylene copolymer, 0.1 part of oxidized isobutyl dicarbonate 1 part of fluorine-containing surfactant;

[0023] Step 2: Add chlorotrifluoroethylene, high-purity water with a pH of 7.1, and a maleic anhydride-modified ethylene-propylene copolymer into the reactor for primary dispersion at a stirring rate of 500 rpm for 3 hours;

[0024] Step 3: Add a fluorine-containing surfactant to the dispersion liquid obtained in Step 2, and continue to maintain the stirring rate at 400rmp for secondary dispersion for 2 hours;

[0025] Step 4: Add high-purity water and oxidized isobutyl dicarbonate to the secondary dispersion obtained in step 3, then react at a pressure of ...

Embodiment 2

[0027] Step 1: Weigh each component according to the following parts by weight: 100 parts of chlorotrifluoroethylene, 500 parts of high-purity water with a pH of 7.1, 50 parts of maleic anhydride-ethylene copolymer, 0.1 part of oxidized isobutyl dicarbonate, fluorine-containing 1 part surfactant;

[0028] Step 2: Add chlorotrifluoroethylene, high-purity water with a pH of 7.1, and maleic anhydride-ethylene copolymer into the reactor for a dispersion at a stirring rate of 500rmp for 3 hours;

[0029] Step 3: Add a fluorine-containing surfactant to the dispersion liquid obtained in Step 2, and continue to maintain the stirring rate at 400rmp for secondary dispersion for 2 hours;

[0030] Step 4: Add high-purity water and oxidized isobutyl dicarbonate to the secondary dispersion obtained in step 3, then react at a pressure of 2 MPa and a temperature of 40°C for 4 hours, then adjust the stirring rate to 100rmp, and raise the temperature to 50°C. The reaction was continued for 2 h...

Embodiment 3

[0032] Step 1: Weigh each component according to the following parts by weight: 100 parts of chlorotrifluoroethylene, 500 parts of high-purity water with a pH of 7.1, 50 parts of maleic anhydride-propylene copolymer, 0.1 part of oxidized isobutyl dicarbonate, fluorine-containing 1 part surfactant;

[0033] Step 2: Add chlorotrifluoroethylene, high-purity water with a pH of 7.1, and maleic anhydride-propylene copolymer into the reactor for a dispersion at a stirring rate of 500rmp for 3 hours;

[0034] Step 3: Add a fluorine-containing surfactant to the dispersion liquid obtained in Step 2, and continue to maintain the stirring rate at 400rmp for secondary dispersion for 2 hours;

[0035] Step 4: Add high-purity water and oxidized isobutyl dicarbonate to the secondary dispersion obtained in step 3, then react at a pressure of 2 MPa and a temperature of 40°C for 4 hours, then adjust the stirring rate to 100rmp, and raise the temperature to 50°C. The reaction was continued for 2...

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Abstract

The invention discloses a preparation method of modified polytrifluorochloroethylene resin. The preparation method comprises the following steps of: weighing the following components: trifluorochloroethylene, high-purity water, a hydrophobic polymer dispersant, an initiator and a surfactant; adding the chlorotrifluoroethylene, the high-purity water and the hydrophobic polymer dispersant into a reaction kettle for primary dispersion; adding the surfactant into obtained dispersion liquid, and carrying out secondary dispersion; and adding the high-purity water and the initiator into obtained secondary dispersion liquid to continue the reaction, and washing and drying an obtained product to obtain the polytrifluorochloroethylene resin. According to the preparation method of the modified polytrifluorochloroethylene resin of the invention, the surfactant is added into the dispersion liquid in the preparation process, so that odor emitted by a dispersion medium during water absorption can be effectively reduced, the added oil-soluble redox initiator can ensure that the chain propagation reaction of the trifluorochloroethylene is carried out at a uniform speed in an oil phase, then polytrifluorochloroethylene resin is separated out, and granulation is not needed in the later period.

Description

technical field [0001] The invention relates to the technical field of polymer production, in particular to a method for manufacturing modified polychlorotrifluoroethylene resin. Background technique [0002] Polytrifluorochloroethylene is a polymer of chlorotrifluoroethylene, which has excellent chemical stability, insulation and weather resistance, and its mechanical strength and hardness are better than polytetrafluoroethylene. It has better transparency and lower air permeability when made into a film Speed, polytrifluorochloroethylene is inert to most active chemicals at room temperature, it is convenient to store, and polytrifluorochloroethylene has excellent gas barrier ability, and the water vapor permeability of its film products is the best among all transparent plastics It is the lowest in the film, and its electrical properties are similar to other perfluoropolymers, but the dielectric constant and loss factor are slightly higher, especially at high frequencies, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/24C08F4/40
CPCC08F114/24C08F4/40
Inventor 张炉青倪姝姝缪璐阳张书香
Owner UNIV OF JINAN
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