Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of modified PTFE dispersion resin and preparation method thereof

A dispersing resin and modification technology, which is applied in the field of modified PTFE dispersing resin and its preparation, can solve the problems of shortened service life, uneven mechanical properties, affecting product weight, etc., and achieve lower extrusion pressure and good paste extrusion performance, and the effect of improving thermal stability

Active Publication Date: 2021-10-29
JUHUA GROUP TECH CENT
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the uneven shrinkage of the fibers, the voids left by the volatilization of the organic solvent during the processing are not filled, so that the finished product after sintering has a certain porosity, which affects the weight of the product, especially the mechanical properties of the product. When the high compression ratio When PTFE resin is used in long-term stress conditions such as hydraulic hoses and dynamic cables, the service life is drastically shortened due to the inhomogeneity of the mechanical properties of the product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of modified PTFE dispersion resin and preparation method thereof
  • A kind of modified PTFE dispersion resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1m 3 700L of deionized water, 30kg of paraffin, 200g of perfluorooctanoic acid ammonium, and 500g of surface fluorinated silica nanoparticles were added to the stainless steel reaction kettle. Carry out nitrogen replacement and vacuum treatment to the polymerization kettle, and analyze the oxygen content. When the oxygen content is less than or equal to 10ppm, it is qualified. Then 700g of PPVE was added, the temperature of the reactor was raised to 70°C, stirring was started, TFE monomer was added to 1.8MPa, and the stirring rate was 280rpm. After reaching the specified temperature and pressure, add 3g of initiator ammonium persulfate (dissolved in 20g of deionized water) and 60g of succinic acid peroxide dissolved in deionized water, and the reaction starts. During the whole reaction process, the pressure of the polymerization tank was kept at 1.8MPa±0.05MPa. When the reaction was carried out until the consumption of TFE was 20 kg, the monomer in the gas phase was r...

Embodiment 2

[0041] 1m 3 700L of deionized water, 30kg of paraffin, 200g of perfluorooctanoic acid ammonium, and 500g of surface fluorinated silica nanoparticles were added to the stainless steel reaction kettle. Carry out nitrogen replacement and vacuum treatment to the polymerization kettle, and analyze the oxygen content. When the oxygen content is less than or equal to 10ppm, it is qualified. Then 1600g of PPVE was added, the temperature of the reactor was raised to 70°C, stirring was started, TFE monomer was added to 1.8MPa, and the stirring rate was 280rpm. After reaching the specified temperature and pressure, add 3g of initiator ammonium persulfate (dissolved in 20g of deionized water) and 60g of succinic acid peroxide dissolved in deionized water, and the reaction begins. During the whole reaction process, the pressure of the polymerization tank was kept at 1.8MPa±0.05MPa. When the reaction was carried out until the consumption of TFE was 20 kg, the monomer in the gas phase was ...

Embodiment 3

[0043] 1m 3 700L of deionized water, 30kg of paraffin, 200g of perfluorooctanoic acid ammonium, and 500g of surface fluorinated silica nanoparticles were added to the stainless steel reaction kettle. Carry out nitrogen replacement and vacuum treatment to the polymerization kettle, and analyze the oxygen content. When the oxygen content is less than or equal to 10ppm, it is qualified. Then 100g of PPVE was added, the temperature of the reactor was raised to 70°C, stirring was started, TFE monomer was added to 1.8MPa, and the stirring rate was 280rpm. After reaching the specified temperature and pressure, add 3g of initiator ammonium persulfate (dissolved in 20g of deionized water) and 60g of succinic acid peroxide dissolved in deionized water, and the reaction begins. During the whole reaction process, the pressure of the polymerization tank was kept at 1.8MPa±0.05MPa. When the reaction was carried out until the consumption of TFE was 20 kg, the monomer in the gas phase was r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a modified PTFE dispersion resin and a preparation method thereof. The PTFE dispersion resin particle has a three-layer structure including an inner core, a second layer and a third layer, the inner core is a PTFE core, and the second layer is a PTFE homopolymer , the third layer is fluorinated olefin modified PTFE. The preparation method includes adding a nucleating agent to help nucleation at the initial stage of the reaction, adding perfluoroalkyl vinyl ether to modify the core structure layer at the same time, performing homopolymerization of TFE, adding modified monomers and chain transfer agents, and then Tetrafluoroethylene was introduced until the reaction was completed. The PTFE dispersion resin prepared by the invention has good paste extruding properties, excellent mechanical properties, good thermal stability and high transparency. In the present invention, through the addition of a nucleating agent and the improvement of the core-shell structure, the performance of the original PTFE resin can be retained to the greatest extent, and a kind of PTFE resin with good paste extrusion performance, excellent mechanical properties, good thermal stability and high temperature can be obtained at the same time. Transparency modified PTFE resin.

Description

technical field [0001] The invention belongs to the field of polymer resins, and relates to a modified PTFE dispersion resin and a preparation method thereof. Background technique [0002] Dispersion resin is an important variety of polytetrafluoroethylene, which is the product of polymerization in the medium of tetrafluoroethylene monomer, which is dispersed into an emulsion state by an emulsifier. According to the requirements of use and the internationally popular classification method, the dispersion resin with a compression ratio greater than 1000:1 is generally called a high compression ratio dispersion resin. The compression ratio is defined as the ratio of the cross-sectional area of ​​the compression-molded preform to the cross-sectional area of ​​the push-molded product. Conventional homopolytetrafluoroethylene dispersion resin is a linear, high-clean dispersion resin with the highest thermal stability, but has extremely low melt flow and low compression ratio, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08F214/26C08F216/14C08F114/26C08F214/28
Inventor 郑侠俊汪星平张广欣陈振华孙倍佳王树华
Owner JUHUA GROUP TECH CENT
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com