Ternary polymerization polytetrafluoroethylene resin, and preparation method and concentrated dispersion liquid thereof

A technology for ternary copolymerization of polytetrafluoroethylene and polytetrafluoroethylene, which is applied in the field of ternary copolymerized polytetrafluoroethylene resin, its preparation method and its concentrated dispersion liquid, can solve the problems of water-based paint processing performance not being improved, etc. , to achieve the effect of improving transparency and gloss, saving production costs, and mild reaction conditions

Active Publication Date: 2014-07-16
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

Compared with the PTFE concentrated dispersion, the water dispersion still has strict requirements on the processing conditions, and high temperature sintering is required, so the processing performance as a water-based coating has not been improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Add 2.8kg of deionized water, 5g of ammonium carbonate, and 5g of perfluorooctanoic acid ammonium to a stainless steel high-pressure reactor with a stirring and temperature-regulating jacket and an inner capacity of 5L, at 70rpm Stir, replace 3 times with nitrogen, and replace 2 times with tetrafluoroethylene monomer, analyze the oxygen content below 30ppm as qualified, press in tetrafluoroethylene monomer to make the internal pressure of the kettle reach 0.05MPa, press in 50g of HFP gas, use metering Press into the equipment 40gPPVE, 10g methanol and 0.4g ammonium persulfate, raise the temperature of the reactor to 70°C, and press in tetrafluoroethylene monomer until the pressure inside the kettle reaches 1.6MPa. As the reaction proceeds, use tetrafluoroethylene monomer to keep the pressure in the kettle constant, and the temperature rises slowly. When the tetrafluoroethylene monomer consumed in the reaction reaches 1.6kg, the reaction is ended. When the reaction ends, t...

Embodiment 2

[0041] The same process as in Example 1, only the amount of PPVE was adjusted to 50g, the reaction end temperature was 79°C, the melting point of the obtained resin was 304°C, and the melt index was 20.4g / 10min (372°C, 5kg load).

[0042] The same process as in Example 1 was used to prepare the concentrated dispersion, and the glossiness was 29.3-32.8.

Embodiment 3

[0044] The same process as in Example 1, only the amount of PPVE was adjusted to 30g, the reaction end temperature was about 78°C, the melting point of the obtained resin was 313°C, and the melt index was 9.3g / 10min (372°C, 5kg load).

[0045] The same procedure as in Example 1 was used to prepare the concentrated dispersion, and the glossiness was 27.1-29.8.

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PUM

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Abstract

The invention relates to a ternary polymerization polytetrafluoroethylene resin which is formed by copolymerizing tetrafluoroethylene, fluorine-containing olefin and perfluor (alkyl vinyl ether) and also relates to a preparation method and concentrated dispersion liquid of the ternary polymerization polytetrafluoroethylene resin. On the basis that the original characteristics of the polytetrafluoroethylene resin are kept, the provided ternary polymerization polytetrafluoroethylene resin can be processed to form products with various specifications and shapes through melting, so that the application range of the polytetrafluoroethylene resin is widened; the provided concentrated dispersion liquid of the polytetrafluoroethylene can fully cover the surface of a base material during film coating, and the light-transmitting performance and the glossiness of the coated film are improved; and by the provided preparation method, the production cost is reduced, environment pollution is reduced, the reaction conditions are mild, and high safety can be achieved.

Description

technical field [0001] The invention relates to the field of tetrafluoroethylene copolymers, in particular to a terpolymerized polytetrafluoroethylene resin, a preparation method thereof and a concentrated dispersion liquid thereof. Background technique [0002] Polytetrafluoroethylene resin is an engineering plastic with excellent comprehensive properties. It can be divided into suspension resin and dispersion resin according to its polymerization process. The application field of polytetrafluoroethylene resin is limited. [0003] PTFE aqueous dispersion can form a film with chemical stability, non-stickiness, weather resistance, water and oil repellency, and excellent transparency on the surface of fabrics and metals by spraying, dipping, etc., and can be widely used in household applications From industrial supplies to aerospace supplies, such as the non-stick coating film on the inner wall of electric rice cookers and the bottom of electric irons, non-stick coatings on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/26C08F214/22C08F214/18C08F214/24C08F214/28C08F216/14C08F2/18C08F2/38C08F6/22C08J3/07C08L27/18
Inventor 张建新胡显权姚权卫张春静秦向明
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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