Unlock instant, AI-driven research and patent intelligence for your innovation.

Long-term stable oil PTFE dispersion and method for its production

A technology of -PTFE- and PTFE, which is applied in the field of oil-polytetrafluoroethylene-dispersion and its preparation, can solve the problems of unknown oil-PTFE-dispersion, etc., and achieve the effect of reducing friction coefficient and reducing wear

Active Publication Date: 2010-08-25
LEIBNIZ INST FUR POLYMERFORSCHUNG DRESDEN EV
View PDF13 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The known solution has the disadvantage that no long-term stable oil-PTFE dispersion is known

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

Embodiment 1

[0066] Similar to Comparative Example 1, 135 g of ethylenically unsaturated Double bonded ester oil (Synative: has ethylenically unsaturated double bonds) and stirred under a nitrogen purge for 30 minutes. Then add 15 grams of PTFE emulsion polymer composed of PTFE nanoparticles (this PTFE emulsion polymer carries out electron radiation with 300kGy in the presence of oxygen, possesses the PTFE primary particle size of 60 to 80 nanometers), is heated to 100 °C and stirred vigorously at 100 °C for 2 hours and at 140 °C for another 2 hours. The dispersion was cooled without stirring.

[0067] After cooling, this long-term stable oil-PTFE dispersion formed, which also did not exhibit precipitation after 8 weeks, that is to say no sedimentation of PTFE occurred. Likewise, even when 10% by mass of the modified PTFE nanoparticles was diluted to 3% by mass, no precipitation was observed.

[0068] The pure Synative oil has a Brugger value of 26Mpa, while the Brugger value of the oil...

Embodiment 2

[0070] Similar to Comparative Example 1, 120 g of unsaturated ester was precharged in a 250 ml three-necked flask with pure nitrogen vent / gas delivery, Ultraturrax type stirrer and short reflux condenser with Bunsen valve oil (Synative: having ethylenically unsaturated double bonds) and stirred under a nitrogen purge for 30 minutes. Then add 30 grams of PTFE emulsion polymer composed of PTFE micro-particles, (this PTFE emulsion polymer carries out electron radiation with 500kGy in the presence of oxygen, and possesses a PTFE primary particle size of 200 nanometers), heated to 100°C under stirring And vigorously stirred at 100°C for 1 hour, and at 150°C for another 1 hour. The dispersion was cooled without stirring.

[0071] After cooling, a long-term stable oil-PTFE dispersion is formed which does not exhibit precipitation after 10 weeks, ie no sedimentation of PTFE occurs. Likewise, no precipitation was observed when 20% by mass of the modified PTFE microparticles was dilut...

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

No PUM Login to View More

Abstract

The invention relates to the field of chemistry and concerns long-term stable oil PTFE dispersions, as can be used for example in gears or bearings, and a method for their production. The aim of the present invention is therefore specifying long-term stable oil PTFE dispersion, and a simple and cost-effective method for its production. This task is solved by an oil PTFE dispersion comprising PTFE particles and a singly or multiply olefinically unsaturated oil, wherein molecules of the olefinically unsaturated oil an PTFE (primary) particle surfaces are coupled covalently / chemically by radical reactions, and wherein there is permanent charge separation between the PTFE particle surfaces and the coupled oil molecules and a fine dispersing of the PTFE particles in the oil or oil mixture. This task is further solved by a method in which modified PTFE (emulsion) polymers with persistent perfluor(peroxy) radical are mixed in with olefinically unsaturated oil, after which the modified PTFE (emulsion)polymers undergo mechanical stress.

Description

technical field [0001] The invention relates to the fields of mechanical engineering and chemistry, and to long-term stable oil-polytetrafluoroethylene (PTFE) dispersions, which can be used, for example, with sliding friction and wear. In moving parts where friction is required, e.g. in transmissions or bearings. Background technique [0002] Oil-PTFE-dispersions have been described several times. Dispersions of PTFE in oil, with or without additives, undergo a precipitation of PTFE within a short time, which is then mostly difficult to break apart / redisperse. [0003] However, a large number of publications are devoted solely to the investigation of the composition of the dispersions or the use of specific additives for better stabilization of the dispersions, wherein no general attention has been given to the dispersion stability. [0004] Known from FR 2857373 A1 are PTFE-containing mineral oils in dispersions for household and workshop use, which mineral oils have 80 t...

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): C10M107/38C10M147/04C08F259/08C08J3/09C10N70/00C10N30/06C10N20/06
CPCC08F259/08C10M147/04C10M2207/2805C10M2207/28C10N2270/00C10N2220/082C08J3/095C10M2213/0623C08L51/003C10M107/38C10M2213/06C10N2230/06C10M2213/0606C10M2213/062C08L27/18C08J2327/18C08J3/02C10M2207/286C10N2250/12C10N2020/06C10N2030/06C10N2050/015C10N2070/00C08L2666/02
Inventor 迪特尔·莱曼
Owner LEIBNIZ INST FUR POLYMERFORSCHUNG DRESDEN EV
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