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A kind of carboxylated nitrile rubber and preparation method thereof

A technology of carboxylated nitrile rubber and carboxylated nitrile, which is applied in the field of carboxylated nitrile rubber and its preparation, can solve the problems of poor reactivity, easy to scorch, difficult to modify properties, etc., and achieve moderate vulcanization speed, vulcanization and crosslinking The effect of high precision and high response speed

Active Publication Date: 2022-01-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional rubber vulcanization is carried out by using monosulfide bonds or disulfide bonds formed by vulcanization or by using peroxides to form C-C bonds. These two types of crosslinks have simple structures and poor reactivity, making it difficult to further modify them to obtain other properties.
At the same time, for carboxylated nitrile rubber, scorch is very easy to occur when vulcanized by traditional vulcanization methods, and the vulcanization rate is extremely difficult to control

Method used

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  • A kind of carboxylated nitrile rubber and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0040] Take 100 parts of carboxylated nitrile rubber LANXESS X146, 50 parts of N330 carbon black, 3 parts of glycerol, 2 parts of DCC, 1 part of DMAP, and 3 parts of 264 anti-aging agent. Control the temperature at 30-50°C. After the mixing is completed, the mixed rubber is placed at room temperature for 4 hours, and then vulcanized by a flat vulcanizing machine at a vulcanization temperature of 140°C and a vulcanization time of 40 minutes to obtain a product.

Embodiment 2

[0042] Take 100 parts of carboxylated nitrile rubber LANXESS X146, 100 parts of N330 carbon black, 5 parts of glycerol, 5 parts of DCC, 3 parts of DMAP, and 3 parts of 264 anti-aging agent. During the process, the temperature is controlled at 30-50°C. After the mixing is completed, the mixed rubber is placed at room temperature for 8 hours, and then vulcanized by a flat vulcanizer at a vulcanization temperature of 150°C and a vulcanization time of 60 minutes. That is, a product is obtained.

Embodiment 3

[0044] Take 100 parts of carboxylated nitrile rubber LANXESS X146, 80 parts of N550 carbon black, 3 parts of glycerol, 4 parts of DCC, 2 parts of DMAP, and 5 parts of 264 anti-aging agent. During the process, the temperature is controlled at 30-50°C. After the mixing is completed, the mixed rubber is placed at room temperature for 4 hours, and then vulcanized by a flat vulcanizer at a vulcanization temperature of 120°C and a vulcanization time of 35 minutes. That is, a product is obtained.

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Abstract

The invention relates to a carboxylated nitrile rubber and a preparation method thereof. The carboxylated nitrile rubber in the invention comprises the following components: carboxylated nitrile rubber raw rubber, a reinforcing agent, an anti-aging agent, an esterification vulcanizing agent, and an esterification dehydrating agent , Esterification accelerator. The preparation method of carboxylated nitrile butadiene rubber in the present invention mainly is to use polyhydric alcohol to vulcanize carboxylated nitrile butadiene rubber raw rubber, the alcohol group of polyhydric alcohol and the carboxyl group of carboxylated nitrile butadiene rubber raw rubber react to form ester bond, and finally through ester bond Form a cross-linking system to complete the vulcanization of carboxylated nitrile rubber raw rubber. The method of the invention provides a vulcanization mode different from the prior art, and is a unique vulcanization method based on condensation reaction.

Description

technical field [0001] The invention relates to a carboxylated nitrile rubber and a preparation method thereof, in particular to a carboxylated nitrile rubber vulcanization method, which can be used for sulfur-free vulcanization treatment of the carboxylated nitrile rubber. Background technique [0002] Traditional rubber vulcanization is carried out by using monosulfide bonds or disulfide bonds formed by vulcanization or by using peroxides to form C-C bonds. These two types of crosslinks have simple structures and poor reactivity, making it difficult to further modify them to obtain other properties. . At the same time, for carboxylated nitrile rubber, scorch is very easy to occur when vulcanized by traditional vulcanization methods, and the vulcanization rate is extremely difficult to control. [0003] CN1296989A provides a kind of rubber mixture, it comprises at least one kind of rubber and 10 to 800 parts by weight of filler (by 100 parts by weight of rubber), wherein t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L13/00C08K13/02C08K5/053C08K5/29C08K5/3432C08K3/04C08K3/36
CPCC08K13/02C08K5/053C08K5/29C08K5/3432C08K3/04C08K3/36C08L13/00
Inventor 吴宇樊洁李波何连成赵洪国周雷胡海华宋中勤张群郑红兵
Owner PETROCHINA CO LTD
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