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Cold-resistant wear-resistant nitrile rubber sealing material and preparation method thereof

A technology of nitrile rubber and sealing material, which is applied in the field of nitrile rubber sealing material and its preparation, can solve the problems of poor compression permanent deformation performance, influence material processing stability, large compression permanent deformation, etc. Ease of processing workability and post-processing of products, and the effect of improving wear resistance

Active Publication Date: 2013-09-11
GUANGZHOU JST SEALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li Meng et al. ("Study on improving NBR oil resistance and low temperature performance with BR", Xianyang Rubber Industrial Products Research Institute, Li Meng et al., Special Rubber Products, Vol. 30, No. 1, pp. 46-48) vulcanized by composite vulcanization system , NBR with low acrylonitrile content combined with BR, filled with spray carbon black and 30 parts of plasticizer to improve the cold resistance of nitrile rubber, the oil resistance of this formula is relatively poor, and the compression set is large (22%, 100 ℃ *22h)
[0004] These existing methods have the following disadvantages: a large amount of plasticizer is filled to improve the cold resistance of nitrile rubber, which will affect the processing stability of the material, the stability of physical and mechanical properties and the oil resistance of the material; at the same time, the compression set performance of the material Relatively poor
Therefore, it is a difficult point to take into account the cold resistance and wear resistance of nitrile rubber sealing materials at the same time.

Method used

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  • Cold-resistant wear-resistant nitrile rubber sealing material and preparation method thereof
  • Cold-resistant wear-resistant nitrile rubber sealing material and preparation method thereof
  • Cold-resistant wear-resistant nitrile rubber sealing material and preparation method thereof

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preparation example Construction

[0020] Correspondingly, the preparation method of this nitrile rubber sealing material may further comprise the steps:

[0021] Add 100 parts of nitrile rubber to the internal mixer, masticate for 45 to 150 seconds at a temperature of 20 to 50 ° C, and then add the above-mentioned parts by mass of zinc oxide, stearic acid, anti-aging agent, and anti-friction agent for mixing After mixing for 30-60 seconds, add 1 / 2 carbon black (that is, 1 / 2 of the total mass of carbon black) and continue mixing. After mixing for 2-5 minutes, add the remaining carbon black and TP-95 and continue mixing. After refining for 1 to 3 minutes, discharge the rubber at a temperature of 110 to 130°C, knead on the turning machine for 60 to 100 seconds, and cool down the next piece to obtain a section of mixed rubber; a section of mixed rubber is parked at room temperature for 8-10 hours Finally, add the mixed rubber to the wrapping roll on the open mill, add the accelerator and mix for 3 to 5 minutes, an...

Embodiment 1

[0029] A cold-resistant and wear-resistant nitrile rubber sealing material, its formula is as follows:

[0030] Table 1: Formula composition of cold-resistant and wear-resistant nitrile rubber sealing material

[0031]

[0032] Antiaging agent described in embodiment 1 is made up of 1.0 parts of antiaging agent RD and 0.5 part of antiaging agent MB; Described antifriction agent is oleic acid amide; Described carbon black is made up of 30 parts of carbon black N33030 and carbon black N77430 Part composition; The accelerator is composed of 1.8 parts of accelerator TT, 1.0 parts of accelerator CZ and 2.2 parts of accelerator DM.

Embodiment 2

[0034] A cold-resistant and wear-resistant nitrile rubber sealing material, its formula is as follows:

[0035] Table 2: Formula composition of cold-resistant and wear-resistant nitrile rubber sealing material

[0036]

[0037]

[0038] Antiaging agent described in embodiment 2 is made up of 1.0 parts of antiaging agent RD, 0.5 part of antiaging agent 4010NA and 0.5 part of antiaging agent MB; Described antifriction agent is erucamide; Described carbon black is made of carbon 20 parts of black N220 and 50 parts of carbon black N330; the accelerator consists of 2.0 parts of accelerator TT and 2.0 parts of accelerator CZ.

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Abstract

The invention discloses a cold-resistant wear-resistant nitrile rubber sealing material which comprises the following raw materials of: by weight, 100 parts of nitrile rubber, 3.5-8 parts of zinc oxide, 1 part of stearic acid, 1.5-3.5 parts of an antioxidant, 0.5-4.0 parts of an antifriction agent, 60-115 parts of carbon black, 2-10 parts of TP-95, 0.3-1.0 parts of a vulcanizing agent and 3.0-5.5 parts of an accelerant. A preparation method of the nitrile rubber sealing material comprises the steps of plasticating the nitrile rubber, adding the zinc oxide, the stearic acid, the antioxidant and the antifriction agent to carry out mixing, adding 1 / 2 of the carbon black to continue mixing after last mixing, then adding the residual carbon black and TP-95 to continue mixing, discharging glue stock and refining the glue stock with turning, obtaining a segment of rubber compound and placing the segment of the rubber compound, adding the rubber compound to a rubber covered roll of an open mill, adding the accelerant to carry out mixing, milling and packaging in a triangular bag, adjusting thickness and discharging material sheets. The nitrile rubber sealing material provided by the invention has better cold resistance and wear resistance.

Description

technical field [0001] The invention relates to a cold-resistant and wear-resistant nitrile rubber sealing material and a preparation method thereof. Background technique [0002] Nitrile rubber (NBR) is produced by emulsion polymerization of butadiene and acrylonitrile. It has excellent oil resistance (especially alkane oil) and good aging resistance. Therefore, it is widely used in various diaphragms, rubber pads and sealing ring products. During the use of seal products, due to the needs of the working environment under certain working conditions, in addition to the excellent oil resistance and low compression set performance of the product, it is also required to have very good low temperature cold resistance, or require It has good wear resistance and low friction coefficient. Dynamic sealing products working in low temperature environment require materials to have the above properties at the same time. If the compression permanent deformation of the material is too ...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08K13/02C08K3/22C08K5/09C08K3/04C09K3/10
Inventor 吴丽娟黎扬辉
Owner GUANGZHOU JST SEALS TECH
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