Preparation method for rubber peptizer DBD

A technology of rubber peptizer and aminobenzene, which is applied in the field of synthesis of chemical raw materials, can solve the problems of low yield and complicated process, and achieve the effects of high productivity, simple process flow and low production cost

Inactive Publication Date: 2015-09-09
LIAOCHENG KINGE SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low yield and complicated process of the existing rubber peptizer DBD preparation process, the present invention provides a rubber peptizer DBD preparation method, the preparation process of the present invention, raw materials and intermediate products are non-toxic, environmentally friendly, and will not affect The health of production personnel, high yield, simple process and low cost

Method used

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  • Preparation method for rubber peptizer DBD

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First prepare p-aminobenzothiazole:

[0020] Heat the water bath to 50~55°C, weigh 10ml of toluene ethanol solution, dilute it 50 times, prepare a diluted toluene solution, then pour 3g of p-aminoacetanilide crystals, stir, and wait until the aminoacetanilide crystals are completely dissolved in the toluene solution, Toluene solution is an excellent organic solvent; after the temperature is stable, slowly add 5-7 drops of concentrated sulfuric acid, and stir until a suspension is formed; the temperature of the water bath is raised to 70-75°C, and 5g of sodium thiocyanate is weighed Add the solid to the suspension, stir, then add 10ml of benzoyl chloride solution, stir to react; wash with water, dry, and distill off the solvent to obtain needle crystals. This step mainly utilizes p-aminoacetanilide and sodium thiocyanide as the main reactants, and the yield is 68%.

[0021] Then prepare 2,2′-diphenylamine disulfide:

[0022] Weigh 5g of synthesized 2-aminobenzothiazole...

Embodiment 2

[0026] First prepare p-aminobenzothiazole:

[0027] Heat the water bath to 50~55°C, weigh 5ml of toluene in ethanol, dilute 50 times to prepare a diluted toluene solution, then pour 2.1g of p-aminoacetanilide crystals, stir until the aminoacetanilide crystals are completely dissolved in the toluene solution , toluene solution is an excellent organic solvent; after the temperature is stable, slowly add 5-7 drops of concentrated sulfuric acid, and stir until a suspension is formed; the temperature of the water bath is raised to 70-75°C, and 4.3g of thiocyanate is weighed Sodium chloride solid was added to the suspension, stirred, and then 8ml of benzoyl chloride solution was added, stirred and reacted; washed with water, dried, and distilled off the solvent to obtain needle crystals. This step mainly utilizes p-aminoacetanilide and sodium thiocyanide as the main reactants, and the yield is 66%.

[0028] Then prepare 2,2′-diphenylamine disulfide:

[0029] Weigh 5.3g of synthesi...

Embodiment 3

[0033] First prepare p-aminobenzothiazole:

[0034] Heat the water bath to 50~55°C, weigh 5.6ml of toluene in ethanol, dilute 50 times to prepare a diluted toluene solution, then pour 3g of p-aminoacetanilide crystals, stir until the aminoacetanilide crystals are completely dissolved in the toluene solution , toluene solution is an excellent organic solvent; after the temperature is stable, slowly add 5-7 drops of concentrated sulfuric acid, and stir until a suspension is formed; the temperature of the water bath is raised to 70-75°C, and 3.2g of thiocyanate is weighed Sodium chloride solid was added to the suspension, stirred, and then 10ml of benzoyl chloride solution was added, stirred and reacted; washed with water, dried, and distilled off the solvent to obtain needle crystals. This step mainly utilizes p-aminoacetanilide and sodium thiocyanide as the main reactants, and the yield is 68%.

[0035] Then prepare 2,2′-diphenylamine disulfide:

[0036] Weigh 3.6g of synthes...

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Abstract

The invention relates to the technical field of synthesis of chemical raw materials, in particular to a preparation method for a rubber peptizer DBD. The preparation method comprises the following steps: synthesizing 2-aminobenzothiazole; synthesizing 2,2'-disulfide diphenylamine; synthesizing 2,2'-dibenzoylamino diphenyl disulfide. The rubber prepared with the preparation method is good in peptization effect; no toxic substances generate during preparation; the body health of production workers is ensured; the technological process is simple; the production cost is low; the productivity is high.

Description

technical field [0001] The invention relates to the technical field of chemical raw material synthesis, in particular to a method for preparing a rubber peptizer DBD. Background technique [0002] During the processing of natural rubber, the rubber elastomer is firstly masticated to reduce the elasticity of the raw rubber and obtain a certain degree of plasticity, which is convenient for the addition and molding of compounding agents. The masticating process can be masticated alone or with the addition of a peptizer. Modern rubber processing technology is to add chemical peptizer directly into the internal mixer to enhance the plasticizing effect of raw rubber through chemical action and improve mechanical efficiency. [0003] Pentachlorothiophenol (PCTP) and its derivatives have been widely used as a class of efficient peptizers (such as the famous Renacit7) for a long time. Pentachlorothiophenol has good peptizing performance, but it has a strong smell, and its productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C323/42C07C319/22
Inventor 刘万兴刘秀峥
Owner LIAOCHENG KINGE SYNTHETIC MATERIAL
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