Rubber modifier, rubber material, preparation method and application

A rubber modifier and rubber material technology, applied in the field of material manufacturing, can solve the problems of small surface tension and difficult rubber materials, and achieve the effects of low manufacturing cost, long service life, and simple and convenient modification process

Active Publication Date: 2021-02-05
CHEMCHINA ZHUZHOU RUBBER RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PTFE is an inert plastic with the smallest surface tension in solid materials, so it is difficult to be directly used in rubber materials

Method used

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  • Rubber modifier, rubber material, preparation method and application
  • Rubber modifier, rubber material, preparation method and application
  • Rubber modifier, rubber material, preparation method and application

Examples

Experimental program
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preparation example Construction

[0029] The preparation method of the rubber modifier of the present invention is that micron-scale graphite (GP) is coated and modified with cetyltrimethylammonium bromide (CTBA), and nano-scale polytetrafluoroethylene spherical microspheres ( PTFE) into sodium naphthalene solution for surface modification. The surface-modified PTFE is added into the graphite and CTAB solution for stirring treatment to obtain a granular graphite-polytetrafluoroethylene modifier H-PTFE-GP with excellent dispersibility.

[0030] After the graphite is coated and modified by CTAB, the surface roughness of graphite is increased, the surface energy is reduced, and the degree of aggregation is reduced, so that its dispersion in rubber is improved and the mutual contact between graphite is enhanced. The surface tension of polytetrafluoroethylene is the smallest, so it is difficult to be directly used in rubber materials. It needs to be treated with sodium naphthalene on the surface to increase the sur...

Embodiment 1

[0042] Take 10 g of graphite, place it and 2 g of cetyltrimethylammonium bromide (abbreviated as CTAB) in a beaker, add a certain amount of distilled water to fully dissolve, and stir mechanically. Take 10g of nano-polytetrafluoroethylene microspheres and mechanically stir them in sodium naphthalene solution for 20 minutes, then wash them repeatedly with clean water for 3 times, and dry them in an oven at 90°C for 1 hour. Then add the dried polytetrafluoroethylene into the mixed solution of graphite and CTAB and disperse for 4 hours under the condition of mechanical stirring at 200r / m, filter the reaction solution, wash it with absolute ethanol, and place it in a vacuum at 60°C 24h in a dry box to constant weight. Plasticize natural rubber (NR) on a double-roller mill, and vulcanize according to the following formula for rubber products to make rubber gaskets: 100 parts of NR, 30 parts of modifier H-PTFE-GP, and 2 parts of sulfur , 3 parts of accelerator, 3 parts of stearic a...

Embodiment 2

[0045] Take 10g of graphite, place it and 1g of CTAB for short in a beaker, add a certain amount of distilled water to fully dissolve, and stir mechanically. Take 12g of nano-polytetrafluoroethylene microspheres and mechanically stir them in sodium naphthalene solution for 20 minutes, then wash them repeatedly with clean water for 3 times, and dry them in an oven at 90°C for 1 hour. Then add the dried polytetrafluoroethylene into the mixed solution of graphite and CTAB and disperse for 4 hours under the condition of mechanical stirring at 200r / m, filter the reaction solution, wash it with absolute ethanol, and place it in a vacuum at 60°C 24h in a dry box to constant weight. Plasticize NR on a double-roll mill, and vulcanize according to the following formula for rubber products to make rubber gaskets: 100 parts of NR, 30 parts of modifier H-PTFE-GP, 2 parts of sulfur, accelerator 3 parts, stearic acid 3 parts, antioxidant 4 parts, activator 2 parts.

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Abstract

The invention discloses a rubber modifier, a rubber material, a preparation method and application. The rubber material is obtained by modification using the rubber modifier, and the preparation method of the rubber modifier comprises the following steps of: stirring and dispersing graphite powder and hexadecyl trimethyl ammonium bromide in water to modify graphite to obtain a mixed solution; carrying out surface modification treatment on polytetrafluoroethylene microspheres by using a sodium naphthalene solution; and adding the polytetrafluoroethylene microspheres into the mixed solution, stirring for reaction, and carrying out post-treatment to obtain the rubber modifier. The rubber material prepared by the invention has good high temperature resistance, corrosion resistance, solvent resistance, aging resistance and radiation resistance, and also has self-lubricating property and air impermeability.

Description

technical field [0001] The invention belongs to the field of material manufacturing, and relates to a rubber modifier, a rubber material, a preparation method and an application. Background technique [0002] In recent years, especially with the development of science and technology, there are more and more working conditions in modern industry with high-parameter fluids such as high temperature, cryogenic, high pressure, high vacuum, flammable, explosive, highly toxic, and highly corrosive. Leakage in any part of these systems will cause serious harm, so more stringent requirements are put forward for sealing. The gasket is made of paper, rubber sheet or copper sheet, which is placed between two planes to strengthen the sealing material, and is a sealing element arranged between the static sealing surfaces to prevent fluid leakage. Gaskets are usually made of sheet material such as pad paper, rubber, silicone rubber, metal, cork, felt, fiberglass or Teflon. Rubber gaskets...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/04C08L27/18C08L7/00C08K13/06C08K3/06C08J5/18
CPCC08K9/04C08K3/04C08L27/18C08L7/00C08J5/18C08L2201/08C08J2307/00C08J2427/18C08K13/06C08K3/06
Inventor 陈淑菊何超
Owner CHEMCHINA ZHUZHOU RUBBER RES & DESIGN INST
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