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Method for producing rubber vulcanization accelerator DM

A technology of a rubber accelerator and a production method, applied in the direction of organic chemistry and the like, can solve the problems of low DM yield and the like, and achieve the effects of high melting point, high yield and simple process

Inactive Publication Date: 2008-03-05
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a low yield of accelerator DM

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Condensation reaction is carried out with aniline, carbon disulfide and sulfur at 270-280°C and pressure of 9-10Mpa to generate MBT with a mass content of 92%. Add 100 grams of M-Na salt into the KM-01 reactor equipped with catalyst, stir at 70°C and 500 rpm, and then feed oxygen into the solution at a flow rate of 50ml / min for 60 minutes Finally, take a sample to observe the color of the material. When the color of the material is gray or white, stop feeding oxygen, filter with suction, wash with water, filter, and dry to obtain the rubber accelerator DM product. The yield of the dibenzothiazole disulfide reaches 99.2%, and the melting point reaches 179.2°C.

example 2

[0010] The MBT used in this example is the same as in Example 1. Add 150 grams of M-Na salt into the KM-01 reactor equipped with a catalyst, stir at 60°C and a rotating speed of 900 rpm, and then add 60ml / Flow rate of 10 minutes, feed oxygen into the solution, after 50 minutes, take a sample to observe the color of the material, when the color of the material is gray or white, stop feeding oxygen, suction filter, wash with water, filter, and dry to get the rubber accelerator DM product. The yield of the dibenzothiazole disulfide reaches 99.0%, and the melting point reaches 179.5°C.

example 3

[0012] The process for the synthesis of MBT used in this example is the same as that of Example 1. 200 grams of M-Na salt is added to the KM-01 reactor equipped with a catalyst, stirred at 40° C. and a rotating speed of 1000 rpm, and then Inject oxygen into the solution at a flow rate of 90ml / min. After 90 minutes, take a sample to observe the color of the material. When the color of the material is gray or white, stop injecting oxygen. Suction filter, wash with water, filter, and dry to obtain the rubber accelerator DM product. The yield of the dibenzothiazole disulfide reaches 99.5%, and the melting point reaches 179.0°C.

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Abstract

The present invention discloses rubber accelerator DM producing process, which includes the following steps: loading metal Na salt into KM-01 reactor with catalyst, stirring in 100-1500 rpm at 20-90 deg.c, introducing oxygen to the solution in the flow rate of 40-90 ml / min until the color of the material becomes grey or white, suction filtering, water washing, filtering and drying to obtain rubber accelerator DM product. The process has DM yield up to 99 %, and the DM product has high smelting point.

Description

technical field [0001] The invention relates to a production method of a rubber vulcanization accelerator dibenzothiazole disulfide (DM), and belongs to the technical field of rubber vulcanization accelerator DM production. Background technique [0002] With the development of the rubber industry, people pay more and more attention to the research and production of vulcanization accelerators. Vulcanization accelerator plays a very important role in the rubber vulcanization process. It can greatly accelerate the reaction between rubber and vulcanizing agent, improve productivity, and at the same time improve the physical and mechanical properties of vulcanized rubber. DM is an essential in the rubber industry. main accelerator. Literature (Advances in Fine Petrochemical Industry, 2006, 7:35) reported a method for synthesizing DM by means of molecular oxidation reaction. Put a certain amount of M-Na salt and isopropanol into the reactor and stir, add dropwise a mixture of su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/70C08C19/20
Inventor 王树华洪学斌王树领王树恒孟庆保
Owner KEMAI CHEM