Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for production and post-processing of hexafluoropropylene oxide homopolymer

A technology of hexafluoropropylene oxide and production method, applied in the field of fluorine-containing fine chemicals, can solve the problem that the molecular weight of the product is not high enough

Active Publication Date: 2010-07-14
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
View PDF1 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method eliminates expensive, difficult to dry and toxic cesium fluoride, the molecular weight of the product is not high enough

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
  • Method for production and post-processing of hexafluoropropylene oxide homopolymer
  • Method for production and post-processing of hexafluoropropylene oxide homopolymer
  • Method for production and post-processing of hexafluoropropylene oxide homopolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The invention provides a method for producing hexafluoropropylene oxide homopolymer, which comprises using alkali metal fluoride as a catalyst and hexafluoropropylene oxide oligomer as an initiator to trigger the ring-opening reaction of hexafluoropropylene oxide to continuously prepare The method of hexafluoropropylene oxide homopolymer shown in formula (I):

[0011]

[0012] In formula (I), n is an integer from 3 to 50, and its preparation method mainly includes the following steps:

[0013] (a), after mixing anhydrous aprotic polar solvent, hexafluoropropylene oxide oligomer and anhydrous alkali metal fluoride catalyst powder, stir vigorously for 24 hours, then centrifugally filter out initiator clear liquid; The clear solution of the agent is added to the polymerization kettle at one time and cooled to the ring-opening polymerization reaction temperature;

[0014] (b) While keeping stirring, add the mixed liquid of hexafluoropropylene oxide and hexafluoropropyle...

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
degree of polymerizationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing a hexafluoropropylene oxide homopolymer, which comprises the following steps of: reacting potassium fluoride (KF) with a hexafluoropropylene oxide low polymer in a polar non-proton mixed solvent to synthesize an initiating agent, and adding the initiating agent into a reaction kettle at one time; continuously adding a mixed liquid having the temperature lower than the reaction temperature and consisting of hexafluoropropylene oxide (HFPO) and hexafluoropropylene into the reaction kettle, and changing the feeding speed, the reaction temperature and the solvent proportion to synthesize the hexafluoropropylene oxide homopolymer of which the average degree of polymerization is any one from 3 to 50; and reclaiming the potassium fluoride and the solvent respectively through filtration and liquid separation.

Description

Technical field: [0001] The invention belongs to the field of fluorine-containing fine chemicals, and in particular relates to a new process for the preparation and post-treatment of hexafluoropropylene oxide homopolymer. Background technique: [0002] After fluorination of hexafluoropropylene oxide homopolymer, perfluorinated lubricating oil can be prepared. It has the characteristics of heat resistance, oxidation resistance, radiation resistance, corrosion resistance, low volatility, and non-combustibility, thus becoming an extremely reliable lubricant in harsh environments ( Such as lubricants for space machinery components, etc.), widely used in chemical industry, electronics, electrical, machinery, nuclear industry, aerospace, magnetic media and other fields; hexafluoropropylene oxide homopolymer can be hydrolyzed to prepare perfluoropolyether carboxylate acid, this product has important application value in the fields of perfluorosurfactant and emulsion polymerization;...

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 Applications(China)
IPC IPC(8): C08G65/24C08G65/30
CPCY02P20/584
Inventor 徐涛张永明高自宏裴素朋赵淑会蕫辰生
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com