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Manufacturing method of beaded polytrifluorochloroethylene resins

A technology of polychlorotrifluoroethylene and chlorotrifluoroethylene, which is applied in the field of polymer production, can solve problems such as difficulty in popularization, and achieve the effects of low cost, convenient washing and drying

Inactive Publication Date: 2013-09-18
山东森福新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] U.S. Patent US3045000 uses solvents and strong oxidants to carry out terminal group treatment on PCTFE powder, but this process is difficult to be promoted in industrial applications

Method used

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  • Manufacturing method of beaded polytrifluorochloroethylene resins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A 2-liter autoclave with electromagnetic stirring is deoxidized, and 1000g of high-purity water, 100g of diisopropyl ether, 0.4g of isobutyl peroxydicarbonate and 0.6g of N,N-dimethylaniline are added, and the stirring rate is 400rmp 100g of chlorotrifluoroethylene was charged, reacted at 30°C for 4 hours, the stirring rate was adjusted to 100rmp, and the temperature was raised to 50°C. The reaction was continued for 2 hours. Open the reaction kettle, and wash the obtained resin with distilled water at 80°C first, and then with distilled water at room temperature under stirring. Finally, dry at 170° C. for 12 hours to obtain bead-like polychlorotrifluoroethylene resin with a diameter of 1 mm to 3 mm.

Embodiment 2

[0030] Except that the addition amount of diisopropyl ether was 150 g, the rest was the same as that of Example 1, and the polymerization reaction was carried out to obtain bead-shaped polychlorotrifluoroethylene resin of 1 mm to 3 mm.

Embodiment 3

[0032] Replace diisopropyl ether with n-hexane, the addition amount is 150g, replace isobutyl peroxydicarbonate with dibenzoyl peroxide, carry out the same polymerization reaction as in Example 1, obtain 0.8mm ~ 3mm bead-shaped polyterpolymer Chlorofluoroethylene resin.

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Abstract

The invention relates to a manufacturing method of beaded polytrifluorochloroethylene resins, which comprises the following steps of: taking trifluorochlor oethylene, high-purity water, an organic dispersant and an initiator under the condition that the mass ratio of the trifluorochlor oethylene, the high-purity water, the organic dispersant and the initiator is 100:(500-1000): (50-200): (0.1-1); placing the high-purity water, the organic dispersant and the initiator in a reaction kettle, and at a stirring speed of 400-500 rmp, feeding the trifluorochlor oethylene into the reaction kettle; carrying out reaction on the obtained mixture for 4-6 hours under the conditions of 0.2-1 Mpa and 20-30 DEG C; and then continuing to react for 2-4 hours at a temperature of 50 DEG C and at a stirring speed of 100-200 rmp; and carrying out washing and drying on the obtained product so as to obtain a beaded polytrifluorochloroethylene resin with a diameter of 0.5-5 mm. The method disclosed by the invention is stable in polymerization rate and narrow in molecular weight distribution, no dust flying occurs in the process of production, and no further granulation treatment is required; the obtained polytrifluorochloroethylene resin is excellent in performances, and can be prepared into tubes, bars and profiles with more complicated shapes through melt injection molding; and no yellowing phenomenon occurs, therefore, the method has good social, economic and environmental benefits.

Description

technical field [0001] The invention relates to a production method of bead-shaped polychlorotrifluoroethylene resin. The invention belongs to the technical field of high molecular polymer production. Background technique [0002] Polychlorotrifluoroethylene (PCTFE) has high transparency, excellent cold flow resistance, wear resistance, and stable size. It is often used in extreme climate conditions where other materials cannot adapt, especially in high-tech manufacturing and military aerospace. PCTFE is non-hygroscopic, radiation-resistant, and has excellent gas barrier properties. It can be used as a sealing material and an observation window for spacecraft in high-pressure or negative-pressure systems. [0003] PCTFE can be processed into various profiles, such as components in compressors and mechanical pumps, food and drug packaging films, gaskets and bearings, through conventional techniques such as injection molding, spelling out, and compression molding. Because of...

Claims

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Application Information

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IPC IPC(8): C08F114/24C08F214/24C08F214/22C08F214/26C08F216/12C08F2/18C08F4/34C08F4/32C08F4/38
Inventor 程昊杨勇杨涛毕翔宇
Owner 山东森福新材料有限公司
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