High-wearing polytetrafluoroethylene composite material and method for making same

A polytetrafluoroethylene and composite material technology is applied in the field of polytetrafluoroethylene composite material and its preparation, and can solve the problems of high production cost, increased material friction coefficient, wear of grinding surface and the like

Inactive Publication Date: 2008-05-14
丁永津
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent is prepared by mixing PTFE powder and polyacrylonitrile powder, and adding metal and metal oxides, etc., which improves the dispersion and wear resistance of PTFE to a certain extent, but the lack of compatibility between me

Method used

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Experimental program
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Effect test

Embodiment 1

[0028] The high wear resistance polytetrafluoroethylene composite material of the present invention is mainly formed by reaction and polymerization of polytetrafluoroethylene, monomers, initiators, etc. under certain conditions. The composite material has a core-shell structure, and its component weight ratio is : PTFE micropowder (30-300 mesh particle size) 30%, water 50%, monomer 16%, initiator 0.5% of monomer, dispersant 2%, stabilizer 0.1%, surfactant 2% and a small amount Organic solvent; the monomer adopts methyl methacrylate, the initiator is ABVN (azobisisoheptanonitrile), the dispersant is talcum powder and styrene-maleic anhydride copolymer sodium salt, the stable The agent adopts PVA sol, the surfactant is OP-10 or the composite active agent JY-371 purchased in the market, and the organic solvent is toluene and isopropanol.

[0029] The steps of the preparation method are as follows: mix the above-mentioned raw materials in sequence, first mix the water and the surf...

Embodiment 2

[0033] It is mainly composed of polytetrafluoroethylene, monomers, initiators, etc. under certain conditions. It is a composite material with a core-shell structure. The weight ratio of its components is: PTFE micropowder (particle size is 30 mesh-300 mesh) 25%, water 54%, monomer 17%, initiator 0.8% of monomer, dispersant 1%, stabilizer 0.1%, surfactant 1.8%; metal and metal oxide powder can also be added to the components- Iron powder, with a particle size of 10 mesh to 100 mesh, with a content of 1% of the core-shell structure composite material; non-metal oxide powder, carbide powder-silicon carbide powder, with a particle size of 10 mesh to 100 mesh, with a content of core-shell structure 1% of composite materials. The monomer adopts styrene and acrylonitrile, the initiator is BPO (dibenzoyl peroxide), the dispersant is activated calcium phosphate, the stabilizer adopts PVA, and the surfactant is NP-10 and Appropriate amount of defoamer. After the above raw materials ar...

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PUM

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Abstract

The invention discloses polytetrafluoroethylene composite material with high wear resistance, which is characterized in that polytetrafluoroethylene, monomer, initiator and organic solvent are reacted and polymerized to form the composite material with the structure of a core and a shell; wherein, the content for the core part of polytetrafluoroethylene fine particle is 50% to 80%; the shell part occupies 20% to 50%; the weight ratio for raw material component is as below: 1% to 35% of PTFE micropowder (granularity ranges from 30 to 300 mesh), 45% to 705 of water, 1% to 30% of monomer, 0.1% to 1% of initiator (occupying rate among monomer), 0.2% to 4% of dispersing agent, 0 to 0.5% of stabilizing agent, 0.2% to 2% of surface-active material and little organic solvent. The preparation method comprises the steps that: firstly, mixed reaction polymerization; secondly, rinsing; thirdly, dehydration; fourthly, sieving; fifthly, packing. The invention has the advantages of high wear resistance for producing PTFE composite material and other advantages.

Description

technical field [0001] The invention relates to a technology in the field of polymer material modification, in particular to a polytetrafluoroethylene composite material with high wear resistance and a preparation method thereof. Background technique [0002] Polytetrafluoroethylene (PTFE) is widely used in many fields because of its excellent chemical stability, high temperature resistance, ultraviolet radiation resistance, and low friction coefficient. It can even be used in harsh physical and chemical environments and other conditions However, due to the relatively low Tg (glass transition temperature) and high melting point of PTFE, this important known polymer is difficult to process, and it is generally mainly molded, and it is difficult to apply it in extrusion injection molding, which greatly limits it. Applications. If the Tg of the material surface can be increased, the compatibility, dispersion, wear resistance and other properties between them can be greatly imp...

Claims

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Application Information

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IPC IPC(8): C08L51/06C08F259/08C08F2/44C08F4/04C08F4/40C08K7/14C08K3/22C08K3/14C08K3/08C08L1/00C08L31/04
Inventor 丁永津
Owner 丁永津
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