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Vulcanization composition based on nitrile rubber and butadiene rubber, vulcanized rubber and preparation method and application thereof

A technology of butadiene rubber and nitrile rubber, applied in the field of vulcanized rubber and its preparation, can solve the problems of reduced product performance, large difference in polarity, poor compatibility of composite materials, etc., and achieve excellent low temperature resistance and improved compression set. Effect

Pending Publication Date: 2021-10-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, a series of technical problems need to be solved in the preparation of nitrile rubber / butadiene rubber sealing materials: Therefore, it is necessary to strictly control the blending ratio of the two base materials during the blending process. If the amount of butadiene rubber is too high, the product performance will be seriously reduced due to the poor compatibility of the composite materials. If the amount of butadiene rubber is too low, it will not be able to significantly Improve the low temperature resistance of the product
[0008] The above existing technologies have explored and studied some properties of sealing materials, but have not mentioned the matching of rubber sealing material processing technology and product performance

Method used

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  • Vulcanization composition based on nitrile rubber and butadiene rubber, vulcanized rubber and preparation method and application thereof
  • Vulcanization composition based on nitrile rubber and butadiene rubber, vulcanized rubber and preparation method and application thereof
  • Vulcanization composition based on nitrile rubber and butadiene rubber, vulcanized rubber and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0080] The composition formula of this embodiment is shown in Table 2.

[0081] The preparation method of vulcanized rubber is as follows:

[0082] First mixing:

[0083] Set the initial temperature of the internal mixer to 70°C, and the rotor speed to 70rpm, add the rubber matrix, reinforcing agent, calcium sulfate whisker, vulcanization activator, anti-aging agent and plasticizer into the internal mixer for the first mixing for 4 minutes, discharge Glue, parked for 4h, to get the masterbatch.

[0084] Second mixing:

[0085] Set the initial temperature of the internal mixer to 50°C, and the rotor speed to 60 rpm, put the masterbatch, vulcanizing agent and vulcanization accelerator into the internal mixer, mix for 3 minutes, and discharge the rubber.

[0086] Pass the sizing material obtained by the above method once on an open mill with a roll distance of 0.5mm and a roll temperature of 60°C, then adjust the roll distance to 5mm, and pass twice, and park the obtained mixe...

Embodiment 10

[0090] The formulation of the composition used in this example is exactly the same as the formulation of the composition in Example 1, the difference is that the process for preparing vulcanizate in this example is different from that in Example 1, specifically:

[0091] Set the initial temperature of the internal mixer to 55°C and the rotational speed to 60rpm, add the rubber matrix, carbon black, silica, calcium sulfate whiskers, vulcanization activator, anti-aging agent and plasticizer into the internal mixer and mix for 4 minutes, lift the compactor Put the top bolt on the mixing machine, put the masterbatch, vulcanizing agent and vulcanization accelerator into the internal mixer, drop the top bolt on the internal mixer, continue mixing for 3 minutes, and discharge the glue. Pass the rubber compound obtained by the above method once on the open mill with a roller distance of 0.5mm and a roller temperature of 60±5°C, then adjust the roller distance to 5mm, and pass it twice,...

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Abstract

The invention relates to the field of rubber materials, and discloses a vulcanization composition based on nitrile rubber and butadiene rubber, vulcanized rubber and a preparation method and application of the vulcanized rubber, the composition contains a rubber matrix, a reinforcing agent, calcium sulfate whiskers, a vulcanizing agent, a vulcanization accelerator and a vulcanization activator, and optionally contains an anti-aging agent and / or a plasticizer, wherein the rubber matrix is a combination of nitrile rubber and butadiene rubber, and the reinforcing agent is a combination of carbon black and white carbon black. The rubber composition disclosed by the invention has good processability and moderate rubber compound Mooney viscosity, and is suitable for being applied to a high-temperature rapid vulcanization production process; therefore, the further prepared vulcanized rubber has excellent mechanical properties, compression set resistance and low temperature resistance.

Description

technical field [0001] The invention relates to the field of rubber materials, in particular to a vulcanized composition based on nitrile rubber and butadiene rubber, vulcanized rubber, and a preparation method and application thereof. Background technique [0002] Nitrile rubber is one of the most important base materials for rubber sealing materials. Due to its unique molecular structure, nitrile rubber sealing materials are suitable for oil-resistant and heat-resistant environments. With the improvement of the performance requirements of rubber sealing materials in high-end applications, it is often necessary to have other special properties on the basis of the excellent performance of nitrile rubber sealing materials, such as low temperature resistance, but pure nitrile rubber sealing materials cannot meet the requirements. Such products have special requirements for performance. The molecular chain of butadiene rubber has good flexibility, so the glass transition tempe...

Claims

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Application Information

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IPC IPC(8): C08L9/02C08L9/00C08K13/04C08K3/04C08K7/26C08K7/08B29B7/74B29C35/02
CPCC08L9/02B29B7/7495B29C35/02C08L2205/02C08K2201/006C08K2201/016C08K2201/003C08L9/00C08K13/04C08K3/04C08K7/26C08K7/08Y02T10/86
Inventor 郑方远刘苹谭晓村李绍宁段海东乔勋昌
Owner CHINA PETROLEUM & CHEM CORP
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