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Rubber accelerator selenobenzothiazole as well as preparation method and application thereof

A technology of rubber accelerator and benzothiazole, which is applied in the field of rubber accelerator selenobenzothiazole and its preparation, can solve the problems of short scorch time, fast vulcanization speed, easy scorch, etc., achieve short reaction time, avoid Wastewater, simple operation effect

Active Publication Date: 2020-11-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In Zhu Lixin, Hou Yujie, Wu Lianghui, Yu Chong, Shi Chuan. A preparation method of rubber accelerator diethyl dithiocarbamate selenium [P].CN110272365A, 2019-09-24. Introduced a dithio The preparation method of the selenium-containing accelerator belongs to the ultra-fast vulcanization accelerator, the vulcanization speed is fast, the scorch time is short, and it is easy to scorch. It is suitable for thin products, but not for thick products.

Method used

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  • Rubber accelerator selenobenzothiazole as well as preparation method and application thereof
  • Rubber accelerator selenobenzothiazole as well as preparation method and application thereof
  • Rubber accelerator selenobenzothiazole as well as preparation method and application thereof

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Embodiment 1

[0034] Dissolve 0.55 (0.005mol) selenium dioxide in 100ml absolute ethanol under 500rpm stirring condition, dissolve 3.34g (0.02mol) 2-mercaptobenzothiazole in 100ml absolute ethanol under 500rpm stirring condition, the above The two solutions were mixed evenly, and the reaction temperature was controlled to be 50°C. After 12 hours of heat preservation reaction, the filter residue was filtered while hot, washed, dried, and pulverized to obtain the rubber accelerator selenobenzothiazole. The yield of the obtained product is 89.9%, the melting point of the product is 173°C, and the decomposition temperature is 210°C.

Embodiment 2

[0036] Dissolve 0.55 (0.005mol) selenium dioxide in 150ml absolute ethanol under 300rpm stirring condition, dissolve 4.18g (0.025mol) 2-mercaptobenzothiazole in 150ml absolute ethanol under 300rpm stirring condition, the above-mentioned The two solutions were mixed evenly, and the reaction temperature was controlled to be 30°C. After 10 hours of heat preservation reaction, the filter residue was filtered while hot, washed, dried, and pulverized to obtain the rubber accelerator selenobenzothiazole. The yield of the obtained product is 91.2%, the melting point of the product is 174°C, and the decomposition temperature is 208°C.

Embodiment 3

[0038] Dissolve 0.55 (0.005mol) selenium dioxide in 150ml absolute ethanol under 400rpm stirring condition, dissolve 5.01g (0.03mol) 2-mercaptobenzothiazole in 150ml absolute ethanol under 400rpm stirring condition, above-mentioned The two solutions were mixed evenly, and the reaction temperature was controlled to be 30°C. After 6 hours of heat preservation reaction, the filter residue was filtered while hot, washed, dried, and pulverized to obtain the rubber accelerator selenobenzothiazole. The yield of the obtained product is 88.5%, the melting point of the product is 174°C, and the decomposition temperature is 209°C.

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Abstract

The invention discloses a rubber accelerator selenobenzothiazole as well as a preparation method and application thereof. The method comprises the following steps: respectively dissolving selenium dioxide and 2-mercaptobenzothiazole in an organic solvent in a stirring state to obtain a selenium dioxide solution and a 2-mercaptobenzothiazole solution; and then uniformly mixing the selenium dioxidesolution and the 2-mercaptobenzothiazole solution, raising a temperature for a heating reaction, carrying out suction filtration while the solution is hot, taking filter residues, and washing, dryingand crushing the filter residues to obtain the rubber accelerator selenobenzothiazole. The rubber accelerator selenobenzothiazole of the invention is environment-friendly and pollution-free, and has vulcanization accelerating effect superior to the vulcanization accelerating effect of conventional thiazole accelerators. Ethanol can be used as an organic solvent, and can be recycled after the reaction is finished, so the generation of wastewater is completely avoided, and the method is green and environment-friendly. A synthesis process adopted by the invention is a one-pot method, operation issimple, and reaction time is short. The application range of the selenobenzothiazole is expanded, and the promotion efficiency of the selenobenzothiazole is higher than the promotion efficiency of the existing thiazole promoters (M and DM).

Description

technical field [0001] The invention relates to the field of rubber vulcanization accelerators, in particular to a rubber accelerator selenobenzothiazole and its preparation method and application. Background technique [0002] The process of cross-linking rubber is called vulcanization, and the substance that cross-links rubber is called a vulcanizing agent, that is, a cross-linking agent. Vulcanization is the last process of rubber product forming and processing, and it is also the most important physical-chemical process. Unvulcanized rubber has no practical use value. Vulcanization transforms the unvulcanized compounded rubber into vulcanized rubber, and the rubber macromolecules transform from linear chains to three-dimensional network macromolecules, so that rubber products obtain excellent physical, mechanical and chemical properties. [0003] The sulfur vulcanization process has the longest history, and the raw materials used are cheap and abundant. It is the most e...

Claims

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Application Information

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IPC IPC(8): C07D277/68C08K5/48C08L9/06
CPCC07D277/68C08K5/48C08L9/06
Inventor 朱立新江涛杨豪杰颜鹏
Owner SOUTH CHINA UNIV OF TECH
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