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A kind of self-lubricating sealing material and preparation method thereof

A sealing material and self-lubricating technology, which is applied in the field of self-lubricating sealing materials and its preparation, can solve the problems of failure of rubber products, reduce the friction coefficient of rubber products, and single use, so as to achieve less oil loss or gas loss and change in lip size Small, good elongation at break

Active Publication Date: 2022-04-26
QINGDAO REGENCY OIL SEAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent application number CN201410596901.1 discloses a self-lubricating rubber material that is easy to assemble and its preparation method. By adding a lubricant when the rubber is kneaded, the lubricant will migrate on the surface of the rubber product after vulcanization, forming a A thin film can play a lubricating role and reduce the friction coefficient of rubber products. Although the rubber material prepared by this method can improve the self-lubricating performance of ethylene-propylene rubber, a single lubricant that can be precipitated on the surface of the rubber is used. After the friction wears out the lubricant, it will directly wear the rubber raw material, resulting in failure of the rubber product
[0004] Traditional rubber oil seal materials under high temperature and high pressure, due to the large friction coefficient between the oil seal lip and the reciprocating shaft, the sealing lip will accumulate a lot of heat due to frictional heat, which will accelerate the aging and wear of the rubber, resulting in rapid failure of the oil seal, which cannot meet its requirements. Requirements for maintaining a long service life under high temperature and high frequency

Method used

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  • A kind of self-lubricating sealing material and preparation method thereof
  • A kind of self-lubricating sealing material and preparation method thereof
  • A kind of self-lubricating sealing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step (1) Put 60 parts of nitrile rubber and 15 parts of octaethylene-cage silsesquioxane into the internal mixer, the temperature of the internal mixer is 80°C, the speed of the internal mixer is 50r / min, and the processing time is 10min , to obtain modified nitrile rubber.

[0043] Step (2) Dissolve aminopropyl POSS and maleic anhydride in toluene, the molar ratio of POSS to maleic anhydride is 1.01:1, react at 80°C for 24 hours, separate and purify to obtain POSS-MA;

[0044] Step (3) Dissolve POSS-MA, polyethylene glycol, and p-toluenesulfonic acid in toluene. The molar ratio of POSS-MA and polyethylene glycol is 1:1.01, and p-toluenesulfonic acid accounts for 0.01% of the total mass of ethylene glycol, separated and purified after reacting at 120°C for 24 hours to obtain POSS-MA-PEG;

[0045] Step (4) Weigh 0.1 part of POSS-MA-PEG, 0.5 part of silicone oil, 0.01 part of N, N-methylenebisacrylamide according to parts by weight, dissolve POSS-MA-PEG in acetone, add s...

Embodiment 2

[0052] Step (1) Put 80 parts of nitrile rubber and 30 parts of octaethylene-cage silsesquioxane into the internal mixer, the temperature of the internal mixer is 135°C, the speed of the internal mixer is 100r / min, and the processing time is 25min , to obtain modified nitrile rubber.

[0053] Step (2) Dissolve aminopropyl POSS and maleic anhydride in toluene, the molar ratio of POSS to maleic anhydride is 1.05:1, react at 100°C for 36 hours, separate and purify to obtain POSS-MA;

[0054] Step (3) Dissolve POSS-MA, polyethylene glycol, and p-toluenesulfonic acid in toluene, the molar ratio of POSS-MA and polyethylene glycol is 1:1.05, p-toluenesulfonic acid accounts for POSS-MA and poly 1% of the total mass of ethylene glycol, separated and purified after reacting at 140°C for 36 hours to obtain POSS-MA-PEG;

[0055] Step (4) Weigh 2 parts of POSS-MA-PEG, 20 parts of lubricating oil 100SN, 2 parts of polyethylene glycol diacrylate, dissolve POSS-MA-PEG in acetone, add 100SN an...

Embodiment 3

[0062] Step (1) Put 70 parts of nitrile rubber and 20 parts of octaethylene-cage silsesquioxane into the internal mixer, the temperature of the internal mixer is 110°C, the speed of the internal mixer is 80r / min, and the processing time is 20min , to obtain modified nitrile rubber.

[0063] Step (2) Dissolve aminopropyl POSS and maleic anhydride in toluene, the molar ratio of POSS to maleic anhydride is 1.03:1, react at 90°C for 30 hours, separate and purify to obtain POSS-MA;

[0064] Step (3) Dissolve POSS-MA, polyethylene glycol, and p-toluenesulfonic acid in toluene, the molar ratio of POSS-MA and polyethylene glycol is 1:1.03, p-toluenesulfonic acid accounts for POSS-MA and poly 0.15% of the total mass of ethylene glycol, separated and purified after reacting at 130°C for 30 hours to obtain POSS-MA-PEG;

[0065] Step (4) Weigh 0.5 parts of POSS-MA-PEG, 5 parts of lubricating oil 70SN, 0.08 parts of N, N-methylenebisacrylamide, dissolve POSS-MA-PEG in acetone, add 70SN an...

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Abstract

The invention provides a self-lubricating sealing material, which is characterized in that the raw materials for the sealing material include the following components: 60-80 parts of modified nitrile rubber, 20-40 parts of nano-scale lubricating balls, MOF modified graphite 10-20 parts of alkene, 0.5-3 parts of vulcanizing agent, 5-10 parts of vulcanization activator, 1-5 parts of vulcanization accelerator and 30-80 parts of reinforcing agent. The beneficial effects of the present invention are: the self-lubricating sealing material prepared by the present invention has high tensile strength, elongation at break and peeling strength between the skeleton and rubber material, and the hardness, tensile strength and elongation at break after aging are all high. All good too. The self-lubricating sealing material prepared by the invention has good abrasion performance, and still does not leak oil after 10 million times, and has good sealing performance. The lip size of the self-lubricating sealing material prepared by the invention has little change and very little oil loss or gas loss.

Description

technical field [0001] The invention relates to the technical field of self-lubricating seals, in particular to a self-lubricating sealing material and a preparation method thereof. Background technique [0002] The reciprocating oil seal is an essential component of the automobile shock absorber and is a consumable item. With the rapid development of industry, especially the heavy use of heavy trucks, the reciprocating oil seal requires higher temperature and longer service life. [0003] The Chinese patent application number CN201410596901.1 discloses a self-lubricating rubber material that is easy to assemble and its preparation method. By adding a lubricant during rubber mixing, the lubricant will migrate on the surface of the rubber product after vulcanization, forming a A layer of thin film plays a lubricating role and reduces the friction coefficient of rubber products. Although the rubber material prepared by this method can improve the self-lubricating properties of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08L83/07C08L83/12C08K9/04C08K3/04
CPCC08L9/02C08L83/04C08L83/12C08K9/08C08K3/042
Inventor 姚凤霞韩志刚
Owner QINGDAO REGENCY OIL SEAL CO LTD
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