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Production method of rubber accelerator MBT

A technology of rubber accelerator and production method, applied in the production field of rubber accelerator MBT, to achieve the effect of improving the quality of rubber products, improving yield and purity, and improving product quality

Inactive Publication Date: 2015-06-03
TIANJIN YIHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing rubber accelerator processing method, the invention provides a production method of rubber accelerator MBT

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Sulfur dissolving process

[0052] Before driving, check that the stirring and valves of the sulfur dissolving tank are normal, and then prepare for operation;

[0053] First discharge the contents of the sulfur-dissolving kettle, then close the discharge valve and add 500L of water;

[0054] Wet 604kg of sulfur with a purity of 98.5% and wash it into the sulfur-dissolving kettle;

[0055] Stop stirring after 7 minutes of sulfur throwing, and press 1600kg of carbon disulfide with a purity of 98.5% into the sulfur dissolving kettle with water, and continue stirring;

[0056] When the temperature in the kettle reaches 18°C, start stirring, and at the same time, the jacket of the sulfur-dissolving kettle heats up the hot water, and the water temperature is 43°C. When the temperature of the material rises to 21°C, stop heating and continue stirring so that the temperature of the material is lower than 25°C;

[0057] Stir for 40 minutes, stop stirring after the sulfur ...

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Abstract

The invention discloses a production method of a rubber accelerator MBT. The production method comprises the following steps: sequentially adding a certain amount of sulfur and carbon disulfide into a sulfur dissolving kettle with water seal, preparing a sulfur liquid for later use, pressing aniline and the sulfur liquid into a high-pressure kettle by virtue of compressed air, producing a crude MBT by virtue of high temperature and high pressure, dissolving the crude accelerator MBT into a sodium salt by virtue of NaOH, carrying out air oxidation, adding dilute acid to regulate a pH value, separating out resinous impurities, filtering to obtain the pure sodium salt, neutralizing with dilute acid until the pure sodium salt is weakly acidic, converting the pure sodium salt to a finished accelerator MBT, washing to enable the finished accelerator MBT to be neutral, drying by shaking, dewatering, and carrying out pneumatic drying to obtain the accelerator MBT. The production method has the beneficial effects that the yield and the purity of the accelerator MBT can be effectively increased, the quality of product is improved, and thus the quality of rubber product, produced by using the accelerator is improved.

Description

(1) Technical field [0001] The invention relates to a production method of a rubber accelerator, in particular to a production method of a rubber accelerator MBT. (2) Background technology [0002] At present, the rubber accelerator MBT is a general-purpose accelerator, which is widely used in various rubbers. It has rapid vulcanization acceleration in natural rubber and general synthetic rubber. In addition, it also has certain plasticity and anti-aging properties. Neoprene can be used as a retarder, and its derivatives such as: CZ, DZ, NOBS, etc. have better rubber vulcanization acceleration properties. The accelerator is easy to disperse in rubber and does not pollute. It is mainly used in the manufacture of tires, inner tubes, tapes, rubber shoes and industrial products. However, the current accelerator MBT production process has shortcomings, the output generally stays at about 95%, and the purity is about 96%, which affects the quality of rubber products produced by u...

Claims

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Application Information

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IPC IPC(8): C07D277/72
CPCC07D277/72
Inventor 张维仁王伟只生琪
Owner TIANJIN YIHUA CHEM
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