Title:
FUSIBLE POLYTETRAFLUOROETHYLENE RESIN AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/124240
Kind Code:
A1
Abstract:
Disclosed in the present invention are a fusible polytetrafluoroethylene resin and a preparation method therefor. The preparation method comprises the following steps: S1: adding deionized water, an organic solvent, a surfactant and a chain transfer agent to a polymerization kettle; S2: raising the temperature to a set temperature of 50-80°C, and then adding a polymerization monomer composed of a proper amount of tetrafluoroethylene and perfluoroalkyl vinyl ether (PAVE) until a set pressure is 0.7-1.5 MPa, and adding an initiator to start a reaction; S3: supplementing the polymerization monomer and a PAVE polymerization accelerator, and maintaining the pressure of the polymerization kettle until the reaction is ended to obtain a fusible polytetrafluoroethylene emulsion; and S4: condensing, washing and granulating the fusible polytetrafluoroethylene emulsion obtained in step S3 to obtain the fusible polytetrafluoroethylene resin. According to the present invention, the polymerization rate of PAVE can reach 65-90%, fusible polytetrafluoroethylene having special melting point peak distribution can be obtained, and the performance is more excellent and stable.
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Inventors:
ZHAO JINGPING (CN)
GUO ZILIANG (CN)
WANG CHAOFENG (CN)
TU HUAJIE (CN)
YANG LEI (CN)
ZHU JIAN (CN)
GUO ZILIANG (CN)
WANG CHAOFENG (CN)
TU HUAJIE (CN)
YANG LEI (CN)
ZHU JIAN (CN)
Application Number:
PCT/CN2022/118741
Publication Date:
July 06, 2023
Filing Date:
September 14, 2022
Export Citation:
Assignee:
JINHUA YONGHE FLUOROCHEMICAL CO LTD (CN)
International Classes:
C08F214/26; C08F4/26; C08F14/18; C08F214/28; C08F216/14; C08L27/18
Foreign References:
| CN114292358A | 2022-04-08 | |||
| CN110790854A | 2020-02-14 | |||
| CN113402650A | 2021-09-17 | |||
| US20070149734A1 | 2007-06-28 | |||
| US20040214974A1 | 2004-10-28 |
Attorney, Agent or Firm:
HANGZHOU HUADING INTELLECTUAL PROPERTY LAW FIRM (CN)
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