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Nitrile rubber of peroxide fast curing system and preparation method thereof

A technology of nitrile rubber and peroxide, which is applied in the field of rubber, can solve the problems of slow vulcanization rate of nitrile rubber, difficulty in demoulding, and low copper corrosion resistance, and achieve the goals of reducing vulcanization time, improving performance, and increasing vulcanization rate Effect

Inactive Publication Date: 2015-07-08
ANHUI ZHONGDING SEALING PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nitrile rubber used in the past cannot meet the current automobile requirements for high temperature resistance, brake fluid resistance, copper corrosion resistance and low compression set due to the widespread use of effective sulfur vulcanization systems. Therefore, peroxide-cured nitrile rubber is popular Favored by the majority of car manufacturers
[0003] The nitrile rubber of the peroxide vulcanization system in the prior art usually has the problem of slow vulcanization rate, which makes it difficult to demould, etc., which seriously affects the production efficiency of the enterprise

Method used

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  • Nitrile rubber of peroxide fast curing system and preparation method thereof
  • Nitrile rubber of peroxide fast curing system and preparation method thereof
  • Nitrile rubber of peroxide fast curing system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 100 parts by mass of JSR230S nitrile rubber raw rubber, 2 parts by mass of antioxidant KY-405, 65 parts by mass of carbon black, 8 parts by mass of DOS plasticizer, 5 parts by mass of zinc stearate, 5 parts by mass of DC40P-SP2L, 1.5 parts by mass The mass parts of TAIC were put into the open mixer and fully mixed for 3 minutes. When the temperature in the internal mixing room reached 110°C, the rubber material was discharged, and the masterbatch was obtained by rapid blast cooling. Then, the masterbatch is passed through a screw extruder and a required die to obtain a preformed sample of a predetermined size. Finally, put the preformed sample into the mold of a flat vulcanizer, pressurize it to 15MPa, and vulcanize at a vulcanization temperature of 175°C for 170s to obtain nitrile rubber.

Embodiment 2

[0022] 100 parts by mass of JSR230S nitrile rubber raw rubber, 2 parts by mass of antioxidant MBZ, 65 parts by mass of carbon black, 8 parts by mass of TOTM plasticizer, 5 parts by mass of zinc stearate, 7 parts by mass of Luperox233XL, and 2 parts by mass of TAIC Put it into the open mill for full mixing for 4.5min. When the temperature in the mixing room reaches 110°C, the rubber material is discharged, cooled by rapid air blast, and the masterbatch is obtained. Then, the masterbatch is passed through a screw extruder and a required die to obtain a preformed sample of a predetermined size. Finally, put the preformed sample into the mold of a flat vulcanizer, pressurize it to 25MPa, and vulcanize it at a vulcanization temperature of 185°C for 120s to obtain nitrile rubber.

Embodiment 3

[0024] 100 parts by mass of JSR230S nitrile rubber raw rubber, 2 parts by mass of antioxidant MBZ, 65 parts by mass of carbon black, 8 parts by mass of TOTM plasticizer, 5 parts by mass of zinc stearate, 8 parts by mass of Luperox233XL, and 2.4 parts by mass of TAIC Put it into the open mill for full mixing for 4.5min. When the temperature in the mixing room reaches 110°C, the rubber material is discharged, cooled by rapid air blast, and the masterbatch is obtained. Then, the masterbatch is passed through a screw extruder and a required die to obtain a preformed sample of a predetermined size. Finally, put the preformed sample into the mold of a flat vulcanizer, pressurize it to 20MPa, and vulcanize it at a vulcanization temperature of 180°C for 145s to obtain nitrile rubber.

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Abstract

The invention discloses a nitrile rubber of a peroxide fast curing system and a preparation method thereof. The nitrile rubber contains by weight 100-200 parts of nitrile rubber, 4-9 parts of a peroxide vulcanizing agent, 1.2-2.7 parts of an auxiliary crosslinking agent and an adjuvant composition. On the one hand, the curing agent is compounded with an auxiliary crosslinking agent, and the ratio of vulcanization agent and cross-linking agent is optimized; on the other hand, the addition of antioxidant avoids delay in vulcanization time, so as to improve the cure rate and reduce curing time. In addition, the tensile strength, stretching strength, thermal aging resistance and compression permanent deformation of the nitrile rubber are also improved.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a nitrile rubber of a peroxide rapid vulcanization system and a preparation method thereof. Background technique [0002] Nitrile rubber is a terpolymer of ethylene, propylene and non-conjugated dienes. Its most important feature is its superior oxidation resistance, ozone resistance and corrosion resistance, etc. It is mainly used in rubber sealing products related to automobiles. However, with the rapid development of the automobile industry, the requirements for high temperature resistance, brake fluid resistance and low compression set of nitrile rubber sealing products are getting higher and higher, and the service conditions are becoming more and more harsh. The nitrile rubber used in the past cannot meet the current automobile requirements for high temperature resistance, brake fluid resistance, copper corrosion resistance and low compression set due to the widespread use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08K13/02C08K5/14C08K5/3492C08K5/103C08J3/24
CPCC08K13/02C08J3/24C08J2309/02C08K3/04C08K5/098C08K5/103C08K5/14C08K5/34924C08L2201/08C08L9/02
Inventor 夏迎松田友峰许耀东李彬张秀娥孙兵
Owner ANHUI ZHONGDING SEALING PARTS
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