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A kind of polychlorotrifluoroethylene resin and preparation method thereof

A technology of polychlorotrifluoroethylene and chlorotrifluoroethylene, used in coatings, anti-corrosion coatings, etc., can solve the problems of low conversion rate, pollution, low specific gravity of emulsion, etc.

Active Publication Date: 2019-05-17
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mixed solvents not only increase post-processing, raw material costs, and pollution, but also have adverse effects on product performance.
[0011] At present, the preparation method of PCTFE products mainly has problems such as slow reaction speed, long reaction time, low conversion rate and low emulsion specific gravity. PCTFE products mainly have problems such as poor appearance, low molecular weight and low strength loss temperature, which need to be improved. In order to meet market requirements and realize industrial production

Method used

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  • A kind of polychlorotrifluoroethylene resin and preparation method thereof
  • A kind of polychlorotrifluoroethylene resin and preparation method thereof
  • A kind of polychlorotrifluoroethylene resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0089] In a 10L stainless steel reaction kettle with a stirrer, the material is 904L, the aspect ratio is 2.0, and 6.0kg of deionized water is added. Evacuate the air in the reactor with a vacuum pump, then replace it with nitrogen, repeat nitrogen filling and evacuation and degassing until the oxygen content reaches below 30ppm, and then replace it with chlorotrifluoroethylene (CTFE) monomer until the oxygen content in the reactor drops to Below 30ppm. Then start stirring at a speed of 50 rpm, raise the temperature to 40° C., and add CTFE monomer into the reactor through a compressor until the pressure of the reactor reaches 1.0 MPa. After the temperature and pressure are stabilized, add 2.0g of NaOH, 1.0g of ferrous sulfate, and 10g of NaOH through a micrometering pump. 2 S2 o 5 , 10g potassium persulfate to start the reaction. The monomers reacted were continuously supplemented by the compressor to maintain the pressure of the reactor at 1.0 MPa. The reaction was stoppe...

Embodiment 2

[0092] According to the method of Example 1, the initiator is changed to perfluorodipropionyl peroxide, and the others remain unchanged. Some samples were taken for testing, and the results are listed in Table 1.

Embodiment 3

[0094] According to the method of embodiment 1, change initiator is IPP, other are unchanged. Some samples were taken for testing, and the results are listed in Table 1.

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Abstract

The invention relates to a preparation method of polychlorotrifluoroethylene (PCTFE) resin. A horizontal reaction kettle with length-to-diameter ratio being more than or equal to 1.0 serves as polymerization equipment; a chlorotrifluor ethylene monomer or a chlorotrifluor ethylene motor and other comonomers are subjected to polymerization reaction under the constant-pressure condition, so that the reaction speed is increased and the polymerization efficiency is improved; impurities in emulsion are effectively separated by a semi-mechanical and semi-chemical agglomeration method, and residual unstable groups are removed through wet heat treatment, so that volatile matters of the product are effectively reduced and the appearance of the product is greatly improved. By the method provided by the invention, the PCTFE and copolymerization products thereof can be obtained, wherein M-eta exceeds 500000, the volatile matters are less than 0.01 percent, the zero strength temperature is higher than 260 DEG C and the yellowness index (YI) is less than 10.

Description

technical field [0001] The invention relates to the technical field of polymer resins, in particular to a polychlorotrifluoroethylene resin and a preparation method thereof. Background technique [0002] Polychlorotrifluoroethylene (PCTFE) is the earliest thermoplastic fluororesin developed for industrial production. Germany was the first to conduct research, and in 1934 it developed the first fluoroplastic variety—PCTFE. Later, the United States did a lot of research work on the performance of PCTFE during the implementation of the Manhattan Project. In 1942, the United States announced that it had successfully developed it, and it was put into production in 1946. At that time, it was mainly used to separate uranium isotope gas diffusion materials. Since then, PCTFE has achieved industrial production in the United States, the Soviet Union, France, Japan, Germany and other countries. In 1966, my country built a production device with an annual output of 25t PCTFE resin. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/24C08F214/24C08F2/01C08F6/22C09D127/12C09D5/08C08L27/12
Inventor 张廷健张建新汪仲权王先荣余金龙
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD