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Preparation method of high-fluidity modified polytrifluorochloroethylene resin

A polychlorotrifluoroethylene and chlorotrifluoroethylene technology, which is applied in the field of preparation of high-fluidity modified polychlorotrifluoroethylene resin, can solve the problem of inhomogeneity, unstable product performance, and inability to uniformity of polymer state. Guarantee, etc.

Active Publication Date: 2021-04-20
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 polytrifluorochloroethylene resin
  • Preparation method of high-fluidity modified polytrifluorochloroethylene resin

Examples

Experimental program
Comparison scheme
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 powdered polytrifluoroethylene 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 mate...

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 powdered polytrifluoroethylene 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 resin obtained above, mix uniformly in a high-speed mixer, granulate through a screw extruder, and extrude The temperature of the extruder barrel is 260°C-310°C, and the screw speed is 100rpm. The ...

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 powdered polytrifluoroethylene 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 melted b...

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Abstract

The invention belongs to the technical field of preparation of fluorine-containing resin, and particularly relates to a preparation method of high-fluidity modified polytrifluorochloroethylene resin. By using a trifluorochloroethylene monomer as a first monomer and a perfluoroalkyl vinyl ether monomer as a second monomer, copolymerization modification is conducted, and further a small amount of low-molecular-weight high-temperature-resistant fluorine-containing polymer and a high-temperature-resistant nucleating agent with an ultrafine particle size are added, full and uniforml mixing is conducted, and granulating is conducted to obtain the high-fluidity modified polytrifluorochloroethylene granules. Under the condition that the excellent characteristics of mechanical strength, chemical stability and the like of the polytrifluorochloroethylene resin are not damaged, the processing fluidity of the polytrifluorochloroethylene resin is greatly improved, discharging is stable, forming control is easy, the production efficiency is high, meanwhile, the elongation at break, transparency and water vapor barrier property are improved, and the high-fluidity modified polytrifluorochloroethylene resin is especially suitable for preparing high-water-resistance 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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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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