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Production method of rubber accelerator TMTD (tetramethyl thiuram disulfide)

A technology of rubber accelerator and production method, which is applied in the direction of organic chemistry to achieve the effect of increasing yield and purity, improving the quality of rubber products, 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 TMTD

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Condensation process

[0019] Close the bottom joint door of the condensation tank, add 3500L of water into the condensation tank, start stirring, open the cooling water joint door, put in 500L of 40% dimethylamine, start to slowly add 264L of 98% carbon disulfide, and control the reaction time of feeding for about 0.5 hours. Control reaction temperature 25 ℃ simultaneously, close cooling water throttle, continue to stir for 0.5 hour and then slowly add sodium hydroxide 159kg, control reaction temperature 30 ℃, reaction time 1 hour, stop stirring and let stand, after separating carbon disulfide residual liquid, continue to stir, After adding alkali to adjust the pH to 8.9, open the cooling water valve to cool down. When the temperature drops to 30°C, stop stirring, close the cooling water valve to let the materials stand still, open the bottom of the kettle to separate the carbon door, and remove the CS2 residue. After the separation, close the bicarbonate joint doo...

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Abstract

The invention relates to a production method of a rubber accelerator TMTD (tetramethyl thiuram disulfide), which comprises the following steps: carrying out condensation reaction on dimethylamine, sodium hydroxide and carbon bisulfide, oxidizing with chlorine to obtain the TMTD, washing with water, dewatering, and drying. The method can effectively enhance the yield and purity of the accelerator TMTD and improve the quality of product, so that the quality of the rubber product produced by the accelerator is enhanced.

Description

(1) Technical field [0001] The present invention relates to a production method of rubber accelerator, in particular to a production method of rubber accelerator TMTD. (2) Background technology [0002] At present, the rubber accelerator TMTD is an excellent second accelerator for thiazole accelerators. It can also be used together with other accelerators as an accelerator for continuous vulcanization rubber particles. It can also be used together with the accelerator MBT (M). The situation is similar to that of butyl accelerator. The vulcanization of the base rubber is basically similar. The accelerator is mainly used in the manufacture of tires, inner tubes, rubber shoes, medical supplies, cables, industrial rubber products, etc. It is used as a fungicide and insecticide in agriculture, and can also be used as a lubricant additive. However, there are shortcomings in the current production process of accelerator TMTD. The yield generally stays at about 89% and the purity i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C333/32
Inventor 张维仁岳姝雅方守军范德刚
Owner TIANJIN YIHUA CHEM
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