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Synthetic process of rubber vulcanization accelerator CBS

A synthesis process and rubber vulcanization technology, applied in the field of fine chemicals, can solve the problems of unfavorable CBS oxidizing materials fully reacting, discharging environmental pollution, post-processing difficulties, etc., and achieve the effect of improving dispersion effect, reducing pollution, and improving appearance and quality.

Inactive Publication Date: 2015-01-28
TIANJIN YIHUA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the raw material accelerator M is easy to settle in water, and it is easy to produce salt with cyclohexylamine, which is not conducive to the full reaction of CBS oxidation material, and a large amount of waste water will be produced at the same time, which is difficult for post-treatment and discharges to cause environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of synthesis technique of rubber vulcanization accelerator CBS, its concrete operation steps are:

[0017] 1. Pre-treatment of mother liquor: Take out the mother liquor from the oxidation kettle in the CBS workshop, first let it stand in the separatory funnel for 20 minutes, then remove the upper layer of oil, obtain the lower layer of white mother liquor, then filter it, and take out the filtrate for later use.

[0018] 2. Add 100kg of accelerator M into the reaction kettle, add 0.4wt% dispersant SDS equivalent to the mass of M, stir at a speed of 300r / min, and stir for 0.5h at room temperature, so that the raw material accelerator M is fully dispersed, and it is easy to fully react .

[0019] 3. Add 120kg of 39% industrial cyclohexylamine, 200kg of mother liquor, and 2.5% sulfuric acid into the reaction kettle, stir well, heat to 30°C, and stir for 15 minutes.

[0020] 4. Slowly and evenly drop the sodium hypochlorite solution with an available chlorine conten...

Embodiment 2

[0023] A kind of synthesis technique of rubber vulcanization accelerator CBS, its concrete operation steps are:

[0024] 1. Pre-treatment of mother liquor: Take out the mother liquor from the oxidation kettle in the CBS workshop, first let it stand in the separatory funnel for 20 minutes, then remove the upper layer of oil, obtain the lower layer of white mother liquor, then filter it, and take out the filtrate for later use.

[0025] 2. Add 100kg of accelerator M into the reaction kettle, add 0.4wt% dispersant SDS equivalent to the mass of M, stir at a speed of 300r / min, and stir for 0.5h at room temperature, so that the raw material accelerator M is fully dispersed, and it is easy to fully react .

[0026] 3. Add 120 kg of 41% recovered cyclohexylamine, 200 kg of mother liquor, and 4% ammonium sulfate into the reaction kettle, stir well, heat to 30° C., and stir for 15 minutes.

[0027] 4. Slowly and evenly drop the sodium hypochlorite solution with an available chlorine co...

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PUM

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Abstract

The invention provides a synthetic process of rubber vulcanization accelerator CBS. The method is simple, and has controllable process and high repetition rate. The method specifically comprises the following steps: adding an accelerator M and a dispersing agent SDS into a reaction kettle, stirring uniformly, then adding appropriate amount of cyclohexylamine, mother solution and little acid into the reaction kettle, stirring fully and uniformly, dropwise adding sodium hypochlorite solution into the reaction kettle slowly, detecting the oxidation terminal point by using 2-5% of copper acetate when sodium hypochlorite is dropwise added nearing the end, after the oxidation terminal point is reached, cooling the reaction mixture, then filtering and drying to obtain the rubber vulcanization accelerator CBS. The surface active agent SDS is added to improve the dispersion effect of M in a water phase, so that solid and liquid phases can be mixed uniformly, and the appearance and the quality of the product are improved; and besides, the CBS mother solution is recycled and utilized to reduce 20-35% of wastewater discharge volume, the wastewater treatment pressure can be effectively reduced and the environment pollution can be reduced.

Description

technical field [0001] The invention relates to a synthesis process of a rubber vulcanization accelerator CBS, which belongs to the field of fine chemicals. Background technique [0002] The chemical name of the rubber vulcanization accelerator CBS is N-cyclohexyl-2-benzothiazole sulfenamide. It is a late-acting vulcanization accelerator used in a large amount at home and abroad. It has both short vulcanization time and excellent scorch resistance. The advantages. Adding the rubber vulcanization accelerator CBS to rubber products will greatly improve the tear strength, tensile modulus, and resilience performance. The accelerator CBS is better than dodecyl maleate. CBS has a wide range of uses and can be used to make tires, rubber shoes, tapes, hoses, cables, conveyor belts, etc. [0003] At present, the industrialized synthesis process of the domestic production accelerator CBS generally adopts the hydrogen peroxide oxidation method and the sodium hypochlorite oxidation me...

Claims

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Application Information

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IPC IPC(8): C07D277/80
CPCC07D277/80
Inventor 张维仁岳姝雅高强盛晨军
Owner TIANJIN YIHUA CHEM