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Method for processing hydrogenated butadiene acrylonitrile rubber

A technology of hydrogenated nitrile rubber and processing method, which is applied in the field of rubber preparation, can solve problems such as not being fully developed, and achieve the effects of improving service life, increasing competitiveness, and increasing tensile strength

Inactive Publication Date: 2010-05-19
北京华德广研密封件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the above literature is that these formulations cannot fully exert their efficacy under the current conventional mixing process, and the literature does not study the influence of processing conditions on its performance from the technical point of view

Method used

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  • Method for processing hydrogenated butadiene acrylonitrile rubber
  • Method for processing hydrogenated butadiene acrylonitrile rubber
  • Method for processing hydrogenated butadiene acrylonitrile rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add hydrogenated nitrile rubber, anti-aging agent RD, N220 in the double-roller mill according to the raw material dosage formula in Table 1, and mix for 15 minutes at room temperature to obtain a mixed rubber. After the obtained mixed rubber is parked for 6 hours , put it into the heat refiner at 100°C for 30 minutes at high temperature, and then add 2 parts of peroxide crosslinking agent 1,4-bis-tert-butylperoxycumene under room temperature mixing conditions after standing for 30 minutes (parts by weight) kneading for 10 minutes to obtain a mixed rubber, and then vulcanized on a flat vulcanizer at 160° C. for 15 minutes to obtain a hydrogenated nitrile rubber vulcanizate. The mechanical properties and compression set properties of the obtained hydrogenated nitrile rubber vulcanizate are shown in Table 2.

Embodiment 2

[0019] Add hydrogenated nitrile rubber, anti-aging agent RD, N550 in the two-roll mill according to the raw material dosage formula in Table 1, and mix for 15 minutes at room temperature to obtain a mixed rubber. After the obtained mixed rubber is parked for 12 hours , put it into the heat refiner at 110°C for 20 minutes at high temperature, and then add 4 parts of peroxide cross-linking agent 1,4-bis-tert-butylperoxycumene under normal temperature mixing conditions after standing for 50 minutes (parts by weight) kneading for 15 minutes to obtain a mixed rubber, and then vulcanized on a flat vulcanizer at 160° C. for 15 minutes to obtain a hydrogenated nitrile rubber vulcanizate after being parked for 45 minutes. The mechanical properties and compression set properties of the obtained hydrogenated nitrile rubber vulcanizate are shown in Table 2.

Embodiment 3

[0021] Add hydrogenated nitrile rubber, anti-aging agent RD, and semi-reinforcing carbon black in the double-roller mill according to the raw material dosage formula in Table 1 and mix for 20 minutes at normal temperature to obtain a mixed rubber. After parking for 15 hours, add it to the heat mixer and carry out high-temperature re-milling at 120 ° C for 25 minutes. After parking for 60 minutes, add peroxide crosslinking agent 1,4-bis-tert-butylperoxyisopropyl under normal temperature mixing conditions 3 parts (parts by weight) of base benzene were mixed for 10 minutes to obtain a mixed rubber, and then vulcanized on a flat vulcanizer at 170° C. for 10 minutes to obtain a hydrogenated nitrile rubber vulcanizate. The mechanical properties and compression set properties of the obtained hydrogenated nitrile rubber vulcanizate are shown in Table 2.

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Abstract

The invention provides a processing method of hydrogenated nitrile rubber, which is characterized in that the mixing process of processing the hydrogenated nitrile rubber under normal temperature includes a high-temperature remixing step. The invention provides a new concept and a new method for the performance improvement of hydrogenated nitrile rubber seals, and when processing the hydrogenatednitrile rubber vulcanizate, a thermal prcessing technique is introduced, which can effectively increase the mechanical performances of the vulcanizate, such as stretching strength, stretching stress,permanent compression deformation under normal and high temperatures, etc., thus increasing the use performance of the hydrogenated nitrile rubber and enlarging the use range of the hydrogenated nitrile rubber. Particularly in the rubber seals, the technique can effectively increase the service life and sealing performance.

Description

technical field [0001] The invention belongs to the field of rubber preparation, in particular to a processing method of hydrogenated nitrile butadiene rubber (HNBR). Background technique [0002] Hydrogenated nitrile rubber is a new high-performance rubber with high saturation. It has good processing performance, oil resistance, heat resistance and low temperature resistance. Therefore, it is widely used in high-grade rubber sealing products. With the rapid development of the rubber industry, people's requirements for rubber sealing products are getting higher and higher, not only requiring the seals to have sufficient mechanical properties, but also requiring them to have better compression set properties. [0003] At present, the main methods to improve the mechanical properties and compression set properties of hydrogenated nitrile rubber are to improve the formula of vulcanized rubber, use optimized cross-linking system, change the type of cross-linking bond, reinforcin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08J3/20C08L9/02C08K5/20B29C35/02C08K5/14C08K5/09
Inventor 叶素娟彭兵王勇向宇
Owner 北京华德广研密封件有限公司