Composition for rubber sealing material, vulcanized rubber as well as preparation method and application of vulcanized rubber

A technique for rubber seals and compositions, which is applied in the field of vulcanized rubber, compositions for rubber sealing materials, and the preparation of vulcanized rubber. It can solve the problem of large polarity difference, affecting material properties, and no mention of the matching between rubber sealing material processing technology and product performance. and other problems, to achieve the effect of improved compression set and excellent mechanical properties

Active 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, there are a series of problems in the preparation of sealing materials by blending nitrile rubber and natural rubber: first, due to the large difference in polarity between the two base materials, strict control is required For the blending ratio of the two, if the amount of natural rubber is too large, the compatibility of the material will be insufficient and the material properties will be seriously affected. If the amount is too small, the superior performance of natural rubber cannot be fully utilized.
[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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  • Composition for rubber sealing material, vulcanized rubber as well as preparation method and application of vulcanized rubber
  • Composition for rubber sealing material, vulcanized rubber as well as preparation method and application of vulcanized rubber
  • Composition for rubber sealing material, vulcanized rubber as well as preparation method and application of vulcanized rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] The composition formula of this embodiment is shown in Table 2.

[0083] The preparation method of vulcanized rubber is as follows:

[0084] First mixing:

[0085] Set the initial temperature of the internal mixer to 70°C and the rotational speed to 70rpm, add the rubber matrix, carbon black, silica, calcium sulfate whiskers, vulcanization activator, anti-aging agent and plasticizer to the internal mixer for the first mixing 4.5 min, deglue, park for 4h, get the masterbatch.

[0086] Second mixing:

[0087] Set the initial temperature of the internal mixer to 45°C and the rotational speed to 60 rpm, put the masterbatch, vulcanizing agent and vulcanization accelerator into the internal mixer, mix for 3 minutes, and discharge the rubber.

[0088] 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, and park the obtained m...

Embodiment 10

[0092] 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:

[0093] Set the initial temperature of the internal mixer to 50°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 3.5 minutes, lift Put the top bolt on the internal mixer, put the masterbatch, vulcanizing agent and vulcanization accelerator into the internal mixer, drop the top bolt on the internal mixer, continue mixing for 2.5 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, and park ...

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Abstract

The invention relates to the field of rubber materials, and discloses a composition for a rubber sealing material, vulcanized rubber as well as a preparation method and application of the vulcanized rubber, the composition contains a rubber matrix, carbon black, white carbon black, calcium sulfate whiskers, a vulcanizing agent, a vulcanization accelerator and a vulcanization activator, and optionally contains an anti-aging agent and/or a plasticizer, the rubber matrix is a combination of nitrile rubber and natural rubber. The rubber composition provided 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, and the 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, in particular to a composition for rubber sealing materials, a method for preparing vulcanized rubber, the vulcanized rubber prepared by the method, and the application of the vulcanized rubber in sealing materials. Background technique [0002] Although nitrile rubber sealing materials have a series of advantages such as oil resistance and heat resistance, they do not perform well in terms of low temperature resistance and mechanical properties. As the most widely used general-purpose rubber, natural rubber has good molecular chain flexibility, excellent low temperature resistance, and outstanding physical and mechanical properties. The rubber sealing material prepared by blending nitrile rubber and natural rubber has the ability to maintain the nitrile rubber seal. Based on the material performance characteristics, it has the potential to improve the low temperature resistance and mechanical properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L7/00C08K13/04C08K7/26C08K7/08C08K3/04
CPCC08L9/02C08K2201/016C08K2201/006C08K2201/003C08L7/00C08K13/04C08K7/26C08K7/08C08K3/04
Inventor 郑方远谭晓村刘苹李绍宁段海东乔勋昌
Owner CHINA PETROLEUM & CHEM CORP
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