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

Tetrafluoroethylene-propylene fluorine-containing elastic body and preparing method thereof

A tetrafluoroethylene and elastomer technology, applied in the field of new tetrafluoroethylene-propylene fluoroelastomer and its preparation, can solve the problems of difficult wastewater treatment, poor storage stability of emulsion, dark color of emulsion and copolymer, etc.

Active Publication Date: 2007-09-12
SHANGHAI 3F NEW MATERIAL TECH CO LTD
View PDF2 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method overcomes the shortcomings of the method disclosed in U.S. Patent No. 4,277,586 that the polymerization rate is slow, the color of the emulsion and the copolymer is dark, the waste water is difficult to handle, the storage stability of the emulsion is poor, and the activation of the activator is unstable. However, the method obtained The Mooney viscosity and molecular weight of tetrafluoroethylene-propylene fluoroelastomer still need to be further improved to improve its strength performance, compression set resistance and media resistance

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The invention provides a method for preparing the tetrafluoroethylene-propylene fluoroelastomer. The method of the invention firstly provides a dispersion of tetrafluoroethylene, propylene and one or more comonomers in water.

[0020] Other comonomers used in the copolymerization with tetrafluoroethylene, propylene to form tetrafluoroethylene-propylene copolymers depend on the use of the final fluoroelastomer, and the other comonomers can be those known in the art for making fluoroelastomers Any comonomer of the body.

[0021] For example, according to specific applications, the other comonomers that can be copolymerized with tetrafluoroethylene and propylene to form tetrafluoroethylene-propylene copolymers are selected from vinyl compounds that can carry out radical copolymerization reactions with tetrafluoroethylene and propylene ( For example, ethylene, acrylic acid, methacrylic acid, acrylate, methacrylate, styrene, etc.) or the vinyl compound with at least one fluo...

Embodiment 1

[0077]In a 25-liter vertical reactor, add 16,000 grams of deionized water, 31.5 grams of sodium perfluorooctanoate and its homologous mixture, 250 grams of dipotassium hydrogen phosphate, 4.15 grams of ferric sulfate, and 9.25 grams of disodium edetate. Close the reactor, vacuumize and replace with nitrogen until the oxygen content in the reactor is less than or equal to 10ppm. Then start to stir at a rate of 300rpm, raise the internal temperature of the reactor to 30°C, supplement the comonomer mixture until the absolute pressure in the reactor reaches 3.6MPa, and the molar ratio of the comonomer mixture is that tetrafluoroethylene accounts for 75%. , Propylene accounted for 25%. Add 9 grams of potassium persulfate, 8.3 grams of CH 2 (OH)SO 2 K, 30.68 grams of potassium hydroxide, start the polymerization reaction. The absolute pressure in the reactor is maintained at 3.6 MPa by adding additional comonomers, the added comonomers having a molar ratio of tetrafluoroethylene ...

Embodiment 2

[0080] In a 25-liter vertical reactor, add 16,000 grams of deionized water, 31.5 grams of sodium perfluorooctanoate and its homologous mixture, 250 grams of dipotassium hydrogen phosphate, 4.15 grams of ferric sulfate, and 9.25 grams of disodium edetate. Close the reactor, vacuumize and replace with nitrogen until the oxygen content in the reactor is less than or equal to 10ppm. Then start to stir at a rate of 300rpm, raise the internal temperature of the reactor to 25°C, supplement the comonomer mixture until the absolute pressure in the reactor reaches 3.7MPa, and the molar ratio of the comonomer mixture is that tetrafluoroethylene accounts for 75%. , Propylene accounted for 25%. Add 9 grams of potassium persulfate, 8.3 grams of CH 2 (OH)SO 2 K, 30.68 grams of potassium hydroxide, start the polymerization reaction. The absolute pressure in the reactor is maintained at 3.7 MPa by adding additional comonomers, the added comonomers having a molar ratio of tetrafluoroethylene...

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
Tensile strengthaaaaaaaaaa
Weight average molecular weightaaaaaaaaaa
Login to View More

Abstract

An tetrafluoroethylene-propylene fluorine-containing elastomer and its preparation method includes: (1) providing an aqueous dispersions of comonomer, which includes: (a) tetrafluoroethylene, propylene and one or more kind of other comonomers, (b) oxidation-reduction system, which includes: water-soluble inorganic peroxide initiator, water-soluble iron salt reductant, coordination agent, water-soluble inorganic aid reducer, (c) water-soluble metal hydroxide pH modifier, and (d) emulsifier. Its characteristic is (2) under the polymerization temperature of 10~50deg.C and polymerization pressure of 3.1~8MPa, the monomers take polymerization.

Description

technical field [0001] The invention relates to a novel tetrafluoroethylene-propylene fluoroelastomer and a preparation method thereof. Background technique [0002] Tetrafluoroethylene-propylene (TFE-P) fluorine-containing elastomer is a synthetic rubber with excellent performance. Elastomer and vinylidene fluoride-tetrafluoroethylene-hexafluoropropylene terpolymer fluoroelastomer) have excellent properties such as medium resistance and high temperature resistance, and also have high electrical insulation, water vapor resistance, alkali resistance, etc. Unique properties that vinylidene fluoride-based fluoroelastomers do not have. Tetrafluoroethylene-propylene fluoroelastomers are mainly used in heat-resistant wires, water vapor-resistant, alkali-resistant rubber products, etc. It can be made into various O-rings, seals, and diaphragms by extrusion, molding, and other molding methods. , Gaskets, films, valves, hoses, rubber rollers, cables and other rubber products. [0...

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
IPC IPC(8): C08F214/26C08F4/40C08F2/24C08F210/06
Inventor 张冰冰吕克勤徐刚
Owner SHANGHAI 3F NEW MATERIAL TECH 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