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Preparation method of high fluidity modified polychlorotrifluoroethylene resin

A technology of polychlorotrifluoroethylene and chlorotrifluoroethylene, which is applied in the field of preparation of high-fluidity modified polychlorotrifluoroethylene resin, can solve the problem that the transparency and melt fluidity are not improved, and the uniformity of the polymer state cannot be guaranteed , product performance instability and other issues, to achieve the effect of improving melt fluidity and transparency, improving processing fluidity, and easy molding control

Active Publication Date: 2022-04-29
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this method can improve melt fluidity, because the uniformity of the polymer state cannot be guaranteed, it will cause instability and inhomogeneity in product performance, and local mechanical properties will deteriorate. When used to prepare film products, there will be The crystal point or "fish eye" problem caused by the addition of high molecular weight PCTFE
[0007] The modified polychlorotrifluoroethylene invented by CN104829773B improves the fracture resistance by adding perfluoroalkylethylene as a modified comonomer, but its crystallinity is still maintained above 50%, and the transparency and melt fluidity are not improved

Method used

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  • Preparation method of high fluidity modified polychlorotrifluoroethylene resin
  • Preparation method of high fluidity modified polychlorotrifluoroethylene resin

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Taking a 10L high-pressure reactor as an example, add 5L of deionized water, 25g of potassium dihydrogen phosphate, vacuumize, replace oxygen with nitrogen, start stirring at a stirring speed of 400rpm, add 2kg of chlorotrifluoroethylene monomer and 22g of perfluoropropylethylene base ether, then dissolve 22g of azobisisobutylamidine hydrochloride with deionized water and mix evenly, then add it to the reaction kettle, raise the temperature to 55°C, control the reaction temperature at 55°C±1°C, and stop the reaction after stirring for 10 hours , release the pressure to obtain powdery polychlorotrifluoroethylene resin, wash and dry the obtained resin.

[0030] Add 0.1 wt% of fluorochloro oil with a molecular weight of 9000 and 0.1 wt% of boron nitride with a particle size of 0.3 μm to the resin obtained above, mix uniformly in a high-speed mixer, granulate through a screw extruder, and extrude The extruder barrel temperature is 260°C-310°C, the screw speed is 100rpm, the...

Embodiment 2

[0032] Take a 10L high-pressure reactor as an example, add 5L deionized water, 25g potassium dihydrogen phosphate, vacuumize, replace oxygen with nitrogen, start stirring at a stirring speed of 500rpm, add 2kg of chlorotrifluoroethylene monomer and 28g of perfluoromethylethylene base ether, then dissolve 28g of azobisisobutylamidine hydrochloride with deionized water and mix evenly, then add it to the reaction kettle, raise the temperature to 40°C, control the reaction temperature at 40°C±1°C, and stop the reaction after stirring for 11 hours , release the pressure to obtain powdery polychlorotrifluoroethylene resin, wash and dry the obtained resin.

[0033] Add 0.1wt% of perfluoropolyether with a molecular weight of 9800 and 0.35wt% of talcum powder with a particle size of 0.5 μm to the above-mentioned obtained resin, mix uniformly in a high-speed mixer, granulate through a screw extruder, and extrude The extruder barrel temperature is 260°C-310°C, and the screw speed is 100r...

Embodiment 3

[0035] Take a 10L high-pressure reactor as an example, add 5L deionized water, 20g sodium dihydrogen phosphate, vacuumize, replace oxygen with nitrogen, start stirring at a stirring speed of 500rpm, add 2kg of chlorotrifluoroethylene monomer and 15g of perfluoroethylethylene base ether, then dissolve 16g of azobisisobutylamidine hydrochloride with deionized water and mix evenly, then add it to the reaction kettle, raise the temperature to 62°C, control the reaction temperature at 62°C±1°C, and stop the reaction after stirring for 9 hours , release the pressure to obtain powdery polychlorotrifluoroethylene resin, wash and dry the obtained resin.

[0036]Add 0.5wt% of fluorochloro oil with a molecular weight of 8200 and 0.5wt% of boron nitride with a particle size of 0.3 μm to the resin obtained above, mix uniformly in a high-speed mixer, granulate through a screw extruder, and extrude The extruder barrel temperature is 260°C-310°C, the screw speed is 100rpm, the material is mel...

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Abstract

The invention belongs to the technical field of preparation of fluorine-containing resins, and in particular relates to a preparation method of a high-fluidity modified polychlorotrifluoroethylene resin, which uses chlorotrifluoroethylene monomer as the first monomer and adopts perfluoroalkylvinyl The ether monomer is used as the second monomer to carry out copolymerization modification, and further add a small amount of low molecular weight high temperature resistant fluoropolymer and ultrafine particle size high temperature resistant nucleating agent, after fully mixing, granulate to produce high Fluidity modified polychlorotrifluoroethylene pellets. The present invention greatly improves its processing fluidity without impairing the mechanical strength, chemical stability and other excellent properties of the polytrifluorochloroethylene resin itself, and the output is stable, easy to shape and control, high in production efficiency, and at the same time improves Elongation at break, transparency and water vapor barrier properties, especially suitable for the preparation of high water resistance and high transparency film products.

Description

technical field [0001] The invention belongs to the technical field of preparation of fluorine-containing resins, and in particular relates to a preparation method of high fluidity modified polychlorotrifluoroethylene resin. Background technique [0002] Polychlorotrifluoroethylene (PCTFE) is the earliest thermoplastic fluoroplastic developed for industrial production. It is polymerized from chlorotrifluoroethylene (CTFE) as a raw material. It has excellent chemical stability, insulation and weather resistance. It can be used at -196 Long-term use at ~125°C, the mechanical strength and hardness are superior to polytetrafluoroethylene, especially suitable for liquid nitrogen and liquid oxygen cryogenic valve seats and seals, etc. The film made has good transparency and excellent water vapor barrier properties , Widely used in packaging materials for medicine, electronic components, electroluminescent components, photovoltaic components, etc. [0003] Polytrifluorochloroethyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/24C08F216/14C08L27/12C08K3/38C08L71/00C08K3/34
Inventor 杜延华王汉利王军韩瑞芹唐妮邓鹏吉
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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