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

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Problems solved by technology

[0003] However, the preparation of nitrile rubber/butadiene rubber sealing materials needs to solve a series of technical problems: First, due to the large difference in polarity between the molecular chains of nitrile rubber and butadiene rubber, the two matrix materials need to be strictly controlled during the blending process. If the blending ratio of butadiene rubber is too high, the performance of the product will be ser

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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Example Embodiment

[0079] Example 1

[0080] The composition formulation of the present embodiment is shown in Table 2.

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

[0082] First mixed:

[0083] The initial temperature of the renewal is 70 ° C, the rotor speed is 70 rpm, and the rubber substrate, reinforcing agent, calcium sulfate, vulcanized activator, anti-aging agent and plasticizer are added to the mesh for the first mixer for the first mix. Glue, parked for 4 hours to get the mother making gel.

[0084] Second mix:

[0085] The initial temperature of the renewal is set to 50 ° C, the rotor rotor speed is 60 rpm, and the mother refiner, sulfurization agent and vulcanization promoter are put into the mesh, mixed 3 min, and the gelatin.

[0086] The rubber obtained by the above method is 0.5 mm in the roller pitch, and the roller temperature is 60 ° C, then the roller is adjusted to 5 mm, and then the obtained mixed rubber is parked 24 h (below In the case where there is no...

Example Embodiment

[0089] Example 10

[0090] The formulation of the composition employed in the present embodiment is exactly the same as the formulation of the composition in Example 1, and the process of the preparation of the sulfide gel of the present embodiment is different from those of Example 1, specifically:

[0091] The initial temperature of the renewal is set to 55 ° C, the rotational speed is 60 rpm, and the rubber substrate, carbon black, white carbon black, calcium sulfate must, vulcanized activator, anti-aging agent and plasticizer are mixed in the mesh for 4 minutes. The end of the melancholy, putting the mother making gel, sulfurization and vulcanization promoter into the mesh, falling into the endolic bundle, and continues to kill 3 minutes, and the gelatin. The gel obtained by the above method is from 0.5 mm, and the roll temperature is 60 ± 5 ° C, then the roller distance is adjusted to 5 mm, and then the obtained mixed rubber is parked 24 h.

[0092] The above-mentioned mixer ...

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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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