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Coordination crosslinking method for reinforced anti-aging nitrile elastomer

A coordination cross-linking and elastomer-like technology is applied in the cross-linking field of nitrile elastomers to achieve good mechanical properties and enhance anti-aging properties.

Inactive Publication Date: 2012-06-27
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has no reinforcement and anti-aging formula design, from which only nitrile elastomers with unsatisfactory mechanical properties can be obtained, which is far from the actual application requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 100 kilograms of nitrile rubber resin, 5 kilograms of ferric sulfate heptahydrate, 25 kilograms of stearic acid, 50 kilograms of carbon black and 0.1 kilogram of anti-aging agent A into the internal mixer at one time, and mix them evenly at 30 ° C. Obtain a composite rubber material; then send the composite rubber material into a flat vulcanizer for a cross-linking reaction at 160°C for 30 minutes, then discharge the material, and cool to obtain a reinforced anti-aging nitrile elastomer. The physical parameters of the sample were tested according to the relevant national standards: the tensile strength was 16.3Mpa, the elongation at break was 980%, and the Shore hardness was 63. The physical parameters of the sample aged in an air oven at 130°C for 500 hours were tested by the same method: the tensile strength was 15.9Mpa, the elongation at break was 970%, and the Shore hardness was 64.

Embodiment 2

[0028] Put 100 kg of mixed nitrile rubber resin mixed with nitrile rubber and hydrogenated nitrile rubber with a weight ratio of 3:2 into the internal mixer at one time, and 13 kg of sulfuric acid nonahydrate with a weight ratio of 11:1 Mixed ferric sulfate mixed with iron and anhydrous ferric sulfate, 15 kg of stearylamine, 25 kg of carbon black and 3 kg of mixed antioxidant A and BZ with a weight ratio of 6:1 Five kinds of raw materials were mixed evenly at 45°C to obtain a composite rubber; then the composite rubber was sent to a flat vulcanizer for a cross-linking reaction at 175°C for 25 minutes, and then discharged, cooled to obtain a reinforced anti-aging nitrile elastomer . The physical parameters of the sample were tested according to the relevant national standards: the tensile strength was 18.9Mpa, the elongation at break was 897%, and the Shore hardness was 58. The physical parameters of the sample aged in an air oven at 130°C for 500 hours were tested by the same...

Embodiment 3

[0030] 100 kilograms of mixed nitrile rubber resin mixed with nitrile rubber, hydrogenated nitrile rubber and powdered nitrile rubber with a weight ratio of 4:4:1 are thrown into the internal mixer at one time, and 20 kilograms are mixed with a weight ratio of 4:4:1. 3:6:1 mixed ferric sulfate heptahydrate, ferric sulfate nonahydrate and anhydrous ferric sulfate, 15 kg of lauric acid, 5 kg of white carbon black and 1.5 kg by weight ratio of 6:3: 1 anti-aging agent A, anti-aging agent RD and anti-aging agent 264 are mixed five kinds of raw materials of mixed anti-aging agent, mixed uniformly at 55 ℃ to obtain a compound rubber; then the compound rubber is sent to a flat vulcanizing machine at 185 After 21 minutes of cross-linking reaction, the material was discharged and cooled to obtain a reinforced anti-aging nitrile elastomer. The physical parameters of the sample were tested according to the relevant national standards: the tensile strength was 23.4Mpa, the elongation at br...

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Abstract

The invention relates to a coordination crosslinking method for reinforced anti-aging nitrile elastomer. The method is characterized by comprising the following steps of: feeding 100 weight parts of nitrile rubber resin, 5 to 20 weight parts of coordination crosslinking agent, 5 to 25 weight parts of compatilizer, 5 to 50 weight parts of reinforcing filler, and 0.1 to 3 weight parts of antiager into processing equipment at one time, and uniformly mixing at the temperature of between 30 and 55 DEG C to obtain a composite sizing material; and feeding the composite sizing material to reaction equipment, performing crosslinking reaction at the temperature of between 160 and 230 DEG C for 4 to 30 minutes, discharging and cooling to obtain the reinforced anti-aging nitrile elastomer. Compared with non-reinforced anti-aging nitrile elastomer, the reinforced anti-aging nitrile elastomer which is obtained by the method has good mechanical properties, and meets the actual application requirement well.

Description

technical field [0001] The invention relates to a crosslinking method for nitrile elastomers, in particular to a coordination crosslinking method for reinforcing and antiaging nitrile elastomers. [0002] Background technique: [0003] Nitrile elastomers, including nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), powdered nitrile rubber, carboxylated nitrile rubber, liquid carboxylated nitrile rubber, and their mixed rubbers, contain a large amount of cyano (- CN), showing strong polarity, good compatibility with metal salts, and easy to coordinate with metal ions, so they can achieve vulcanization through coordination crosslinking. Compared with traditional sulfur-containing substances or peroxide covalent cross-linking methods, the coordination cross-linking method has the following advantages: (1) The vulcanization system is simple, and the processing technology is energy-saving; (2) It can produce thermally reversible coordination cross-linking bonds , so that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L9/02C08L15/00C08L13/00C08K13/02C08K3/04C08K5/09C08K3/30C08K5/17C08K3/36C08K3/26
Inventor 陈庆华陈荣国钱庆荣曹长林肖荔人刘欣萍卓倩黄宝铨许兢
Owner FUJIAN NORMAL UNIV
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