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Oil-resisting and cold-resisting nitrile butadiene rubber composition and preparation method thereof

A technology of nitrile rubber and composition, which is applied in the field of rubber, can solve the unsolved problems of nitrile rubber low temperature resistance, reduce nitrile rubber oil resistance, nitrile rubber material loss of elasticity, etc., achieve good compression set characteristics, Low processing cost and good processing performance

Active Publication Date: 2015-03-11
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above method of using different types of rubber together has the following disadvantages: First, due to the poor compatibility of different rubber materials, it is difficult to mix uniformly during rubber processing, and phase separation is prone to occur, resulting in unstable final performance of the material; Nitrile rubber is characterized by good oil resistance, but when it is used in combination with other polymers, it generally has a tendency to reduce oil resistance, and if the oil resistance of the rubber used in combination is not good, it will greatly reduce the oil resistance of nitrile rubber when used in combination with nitrile rubber. The oil resistance characteristics; the third is the combination of rubber types, in terms of processing costs and material costs, the price is high
[0005] In addition, the nitrile rubber formula products in the prior art can only be used above -40°C. Under the condition of -40°C, the nitrile rubber material basically loses its elasticity, and it is difficult to play a sealing role. low temperature characteristics

Method used

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  • Oil-resisting and cold-resisting nitrile butadiene rubber composition and preparation method thereof
  • Oil-resisting and cold-resisting nitrile butadiene rubber composition and preparation method thereof
  • Oil-resisting and cold-resisting nitrile butadiene rubber composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: O-ring formulation for railway vehicle braking system

[0035] 100 parts of NBR (raw rubber) (Japan JSR company, brand N250S), after Botong plasticizing, add 1 part of anti-aging agent RD, 1 part of anti-aging agent MB, 80 parts of N550 carbon black (particle size 42nm), and mix evenly Then add 20 parts of RS107, and finally add 2 parts of DCP, 0.5 parts of S, and 1 part of accelerator TT, mix well and leave it for 1 day for vulcanization test. The vulcanization condition of the sample is: 170°C*10min.

[0036] Performance test results: hardness 66; tensile strength 20.1Mpa; elongation 232%; compression set 10.3% (100℃*24h, compression 25%); -50℃ compression cold resistance coefficient 0.29 (compression 20%); resistance 89D The oil volume change rate is 19% (100°C*24h).

Embodiment 2

[0037] Embodiment 2: leather cup formula for railway vehicle braking system

[0038]100 parts of NBR (raw rubber) (Japan JSR company, brand N250S), after Botong plasticizing, add 1 part of anti-aging agent RD, 1 part of anti-aging agent MB, 95 parts of N550 carbon black (particle size 42nm), and add after mixing evenly RS10725 parts, finally add 0.5 parts of S, 1 part of accelerator TT, 0.5 parts of accelerator DM, 1.5 parts of accelerator NOBS, mix well and park for 1 day, and test for vulcanization. The vulcanization condition of the sample is: 160°C*10min.

[0039] Performance test results: hardness 72; tensile strength 16.4Mpa; elongation 256%; compression set 18.2% (100℃*24h, compression 25%); -50℃ compression cold resistance coefficient 0.4 (compression 20%); resistance 89D The oil volume change rate is 16.3% (100°C*24h).

Embodiment 3

[0040] Embodiment 3: Diaphragm formula for railway vehicle braking system

[0041] 100 parts of NBR (raw rubber) (Japan JSR company, brand N250S), after Botong plasticizing, 2 parts of anti-aging agent 4010NA, 60 parts of N550 carbon black (particle size 42nm) were added in sequence, after mixing evenly, 20 parts of RS10720 were added, and finally Add 0.5 parts of S, 0.5 parts of accelerator TT, 1.4 parts of accelerator DTDM, and 1 part of accelerator CZ, mix well and park for 1 day for vulcanization test. The vulcanization condition of the sample is: 150℃*15min.

[0042] Performance test results: hardness 60; tensile strength 13.4Mpa; elongation 438%; compression set 25% (100℃*24h, compression 25%); -50℃ compression cold resistance coefficient 0.35 (compression 20%); resistance 89D The oil volume change rate is 14% (100°C*24h).

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Abstract

The invention relates to oil-resisting and cold-resisting nitrile butadiene rubber composition and a preparation method thereof. The oil-resisting and cold-resisting nitrile butadiene rubber composition comprises components in parts as follows: nitrile butadiene rubber, a reinforcing system, a vulcanization system and a plastification system. The nitrile butadiene rubber composition uses single nitrile butadiene rubber and has good oil resistance and oil resistance.

Description

technical field [0001] The invention relates to the field of rubber, in particular to an oil-resistant and cold-resistant nitrile rubber composition and a preparation method thereof. Background technique [0002] Nitrile-butadiene rubber (NBR), also known as butadiene-acrylonitrile rubber, is a synthetic rubber with good oil resistance and aging resistance. It has been widely used as a general oil-resistant rubber in sealing rings, diaphragms and rubber pads. kinds of products. Due to special working conditions, the above-mentioned various products not only need to be in contact with oil but also work at low temperature for a long time. For nitrile rubber, its acrylonitrile content directly affects its oil resistance and cold resistance. The higher the acrylonitrile content, the better the oil resistance and the worse the low temperature resistance. On the contrary, the lower the acrylonitrile content, the worse the oil resistance and The lower the temperature, the better....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K13/02C08K3/04C08K5/14C08K3/06
CPCC08K3/04C08K3/06C08K5/11C08K5/14C08K13/02C08L9/02
Inventor 毛昆朋贾颖华杜卫超陈梦李柱吕博潘会鹏
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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