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

A nitrile rubber and composition technology, applied in the field of rubber, can solve problems such as the matching of rubber sealing material processing technology and product performance, and achieve excellent mechanical properties, compression set resistance, and good processing performance. Effect

Active Publication Date: 2021-09-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The composition formula of this embodiment is shown in Table 2.

[0080] The preparation method of vulcanized rubber is as follows:

[0081] First mixing:

[0082] Set the initial temperature of the internal mixer to 70°C and the rotational 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, and deglue , parked for 4h to obtain the masterbatch.

[0083] Second mixing:

[0084] Set the initial temperature of the internal mixer to 50°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.

[0085] 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 pa...

Embodiment 10

[0088] The composition formulation of the present embodiment is exactly the same as that in Example 1.

[0089] The preparation method of vulcanized rubber is as follows:

[0090] Set the initial temperature of the internal mixer to 55°C and the rotational speed to 60rpm, add the rubber matrix, reinforcing agent, calcium sulfate whisker, vulcanization activator, anti-aging agent and plasticizer into the internal mixer and mix for 4 minutes, lift the internal mixer to the top 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, and park the obtained mixed rubber for 24h.

[0091] The above mixed rubber was pressed into tablets in an open mill,...

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Abstract

The invention relates to the field of rubber materials, and discloses a vulcanization composition based on nitrile rubber, vulcanized rubber and a preparation method and application of the vulcanized rubber, wherein 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 nitrile rubber, and the reinforcing agent is a combination of carbon black and white carbon black; the vulcanization accelerator is selected from at least one of a thiuram accelerator, a dithiocarbamate accelerator and a sulfenamide accelerator. 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 and compression set resistance.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a vulcanized composition based on nitrile rubber, a vulcanized rubber and a preparation method and application thereof. Background technique [0002] Nitrile rubber is a random copolymer synthesized by emulsion radical polymerization of butadiene and acrylonitrile. Due to the introduction of highly polar acrylonitrile structural units in the rubber molecular chain, nitrile rubber has many performance characteristics different from other general-purpose rubbers, such as oil resistance, heat resistance, abrasion resistance, solvent resistance, etc. These unique properties make nitrile rubber widely used in various fields of production and life. Among them, rubber sealing materials (such as oil seals, O-rings, etc.) are an important application field of nitrile rubber. [0003] At present, due to the need of production efficiency, rubber sealing materials usually adopt high-temperature rapid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L45/02C08K13/04C08K3/04C08K7/26C08K7/08C08K3/06C08K3/22C08K5/09C08K5/40C08K5/47C08K5/3437C08K5/37C08K5/12C08K5/18
CPCC08L9/02C08K13/04C08K3/04C08K7/26C08K7/08C08K3/06C08K3/22C08K5/09C08K5/40C08K5/47C08K5/3437C08K5/37C08K5/12C08K2003/2296C08K2201/014C08L45/02C08K5/18
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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