Low-hardness NBR (nitrile-butadiene rubber) sealing element material for automobile transmission converters and preparation method thereof

A technology for automobile gearboxes and converters, applied in the field of rubber seals, can solve the problems of ozone resistance and high resilience performance that cannot meet the ideal use requirements, and achieve the effects of refined preparation process, good oil resistance, and good temperature resistance.

Inactive Publication Date: 2015-08-05
南京金三力高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings that the existing NBR seals for automotive gearbox converters cannot meet the ideal use requirements in terms of hardness, temperature resistance, gearbox ATF oil resistance, ozone resistance and high resilience performance, and provide a Low-hardness NBR seal material for automobile gearbox converter and its preparation method; the NBR seal material for automobile gearbox converter prepared by adopting the formula provided by the present invention does not need to be filled with a large amount of softener, and the hardness can be reduced to 30-40 Shore A, not only It can meet the German Volkswagen VW2.8.1_P35 standard and has good temperature resistance, transmission ATF oil resistance, ozone resistance and high resilience

Method used

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  • Low-hardness NBR (nitrile-butadiene rubber) sealing element material for automobile transmission converters and preparation method thereof
  • Low-hardness NBR (nitrile-butadiene rubber) sealing element material for automobile transmission converters and preparation method thereof
  • Low-hardness NBR (nitrile-butadiene rubber) sealing element material for automobile transmission converters and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of low-hardness NBR seal material for automobile transmission converter of the present embodiment, its mass ratio is as follows: 100 parts of nitrile rubber, 5 parts of zinc oxide, 1 part of stearic acid, 4,4'-bis(phenyl 2 parts of isopropyl) diphenylamine, 1 part of 2-mercaptomethylbenzimidazole zinc salt, 22 parts of high wear-resistant carbon black, bis[2-(2-butoxyethoxy) ethyl adipate Esters] 15 parts, accelerator TMTD 1.2 parts, accelerator CZ 1.2 parts, accelerator DTDM 3.5 parts.

[0027] Acrylonitrile-butadiene rubber is filled with 50 parts of liquid acrylonitrile-butadiene rubber in the present embodiment, and acrylonitrile content is 31.5%, and the Mooney viscosity ML (1+4) 100 ℃ of 100 ℃ is the nitrile-butadiene rubber of DN223 that Ruion company produces; Zinc is the indirect zinc oxide produced by Zhenjiang Baishui Chemical Co., Ltd.; stearic acid is produced by Malaysia Southern Oil Company; the supplier of bis[2-(2-butoxyethoxy)ethyl adipate] is S...

Embodiment 2

[0036] A kind of low-hardness NBR seal material for automobile transmission converter of the present embodiment, its mass ratio is as follows: 100 parts of nitrile rubber, 7 parts of zinc oxide, 1.5 parts of stearic acid, 4,4'-di(phenyl 2.5 parts of isopropyl) diphenylamine, 0.5 parts of 2-mercaptomethylbenzimidazole zinc salt, 18 parts of high wear-resistant carbon black, bis[2-(2-butoxyethoxy) ethyl adipate Esters] 10 parts, accelerator TMTD 1.05 parts, accelerator CZ 1.35 parts, accelerator DTDM 3 parts.

[0037] The source of each component raw material of this embodiment is identical with embodiment 1.

[0038] The process of preparing the low-hardness NBR seal material for the automotive gearbox converter in this embodiment is as follows:

[0039] Step 1, preparation of master batch rubber: prepare materials according to the above formula, and send all raw materials except accelerator TMTD and accelerator DTDM into the internal mixer to obtain master batch rubber;

[0...

Embodiment 3

[0045] A kind of low-hardness NBR seal material for automobile transmission converter of the present embodiment, its mass ratio is as follows: 100 parts of nitrile rubber, 6 parts of zinc oxide, 0.5 part of stearic acid, 4,4'-di(phenyl 1.5 parts of isopropyl) diphenylamine, 1.5 parts of 2-mercaptomethylbenzimidazole zinc salt, 26 parts of high wear-resistant carbon black, bis[2-(2-butoxyethoxy) ethyl adipate Esters] 20 parts, accelerator TMTD 1.35 parts, accelerator CZ 1.05 parts, accelerator DTDM 4 parts.

[0046] The source of each component raw material of this embodiment is identical with embodiment 1.

[0047] The process of preparing the low-hardness NBR seal material for the automotive gearbox converter in this embodiment is as follows:

[0048] Step 1, preparation of master batch rubber: prepare materials according to the above formula, and send all raw materials except accelerator TMTD and accelerator DTDM into the internal mixer to obtain master batch rubber;

[00...

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Abstract

The invention discloses a low-hardness NBR (nitrile-butadiene rubber) sealing element material for automobile transmission converters and a preparation method thereof, belonging to the technical field of rubber sealing elements. The low-hardness NBR sealing element material for automobile transmission converters comprises 100 parts of NBR, 5-7 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 1.5-2.5 parts of 4,4'-di(phenylisopropyl)diphenylamine, 0.5-1.5 parts of 2-thiomethylbenzimidazole zinc salt, 18-26 parts of high-wear-resistance carbon black, 10-20 parts of ethyl di[2-(2-butoxyethoxy)]adipate, 1.05-1.35 parts of accelerator TMTD (tetramethyl thiuram disulfide), 1.05-1.35 parts of accelerator CZ and 3-4 parts of accelerator DTDM. The preparation method comprises the following steps: compounding a master batch; carrying out two-stage sulfurization on the master batch; and vulcanizing. The hardness of the NBR sealing element material can be lowered to 30-40 Shaw A, thereby satisfying the Volkswagen VW2.8.1_P35 Standard. The NBR sealing element material has the advantages of favorable temperature resistance, transmission ATF oil resistance, ozone resistance and high resilience.

Description

technical field [0001] The invention belongs to the technical field of rubber seals, in particular to a low-hardness NBR seal material for an automobile gearbox converter and a preparation method thereof. Background technique [0002] The rubber seal is one of the important parts to ensure the normal operation of the automotive gearbox converter, and its shock absorption effect directly affects whether the gearbox can work normally. This requires rubber seals to have lower hardness, better resilience, temperature resistance, transmission ATF oil resistance, ozone resistance and other characteristics. [0003] For NBR (nitrile rubber), in order to achieve a hardness standard of 30-40 Shore A, it is usually necessary to add more than 50 parts of softening plasticizer, which will cause the rubber material to be difficult to mix and process, and the comprehensive physical properties are poor. Poor, not suitable for production, let alone have temperature resistance, transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K13/02C08K3/22C08K5/09C08K3/04C08K5/18C08K5/11C08K5/37
CPCC08K3/04C08K3/22C08K5/09C08K5/11C08K5/18C08K5/378C08K13/02C08K2003/2296C08L2201/08C08L2312/00C08L9/02
Inventor 徐海潮吴会会
Owner 南京金三力高分子科技有限公司
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