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Rubber peptizer SS preparation method

A technology of rubber peptizer and oxidant, which is applied in the preparation of organic compounds, chemical instruments and methods, hydrogenated polysulfide/polysulfide preparation, etc. It can solve the problems of complex process, expensive raw materials, and many by-products. Achieve the effect of simple process, price advantage and easy operation

Active Publication Date: 2016-06-29
WILLING NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the former has a higher product yield, but the raw materials are more expensive; the latter has a complicated process, low yield and many by-products

Method used

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  • Rubber peptizer SS preparation method

Examples

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Effect test

Embodiment 1

[0040] A preparation method of rubber peptizer SS, the technological process of its preparation is as follows:

[0041] 1) Decomposition reaction of benzothiazole and sodium hydroxide: put 673.6g (8.42mol) of 50% sodium hydroxide solution and 115g of demineralized water into the reaction kettle in turn, start stirring and dissolving, then add 495g (3.66mol) of benzothiazole, Heat the oil bath to 126°C, react for 5.0 hours, cool down to 100°C, add 600ml of purified water, filter, and get the filter residue M to be incinerated in an incinerator, and the filtrate is transferred to a reaction kettle, and the temperature is controlled at 35-40°C;

[0042] (2) Preparation of 2,2'-diphenylamine disulfide (DS) by oxidation: Add 1118.6ml of mixed acid oxidant dropwise at 35-40°C to the solution in step (1), and the oxidation reaction takes 4.0-4.5 h, the dropwise addition is completed, stirred and reacted for 2.0 hours after heat preservation, centrifuged, the filter cake DS is used fo...

Embodiment 2

[0049] A preparation method of rubber peptizer SS, the technological process of its preparation is as follows:

[0050] (1) Decomposition reaction of benzothiazole and sodium hydroxide: 600.24g (7.5mol) of 50% sodium hydroxide solution and 98g of demineralized water are put into the reaction kettle in turn, and after stirring and dissolving, add 495g (3.66mol) of benzothiazole , heated in an oil bath to 126°C, reacted for 5.0 hours, cooled to 100°C, added 600ml of purified water, filtered, and the obtained filter residue M was put into an incinerator for incineration, and the filtrate was transferred into a reaction kettle, and the temperature was controlled at 35-40°C;

[0051] (2) Preparation of 2,2'-diphenylamine disulfide (DS) by oxidation: Add 990ml of mixed acid oxidant dropwise to the solution in step (1) at 35-40°C, and the oxidation reaction takes 4.0-4.5h After the dropwise addition is completed, stir and react for 2.0 hours after heat preservation, centrifugal separ...

Embodiment 3

[0058] A preparation method of rubber peptizer SS, the technological process of its preparation is as follows:

[0059] (1) Decomposition reaction of benzothiazole and sodium hydroxide: 614.4g (7.68mol) of 50% sodium hydroxide solution and 110.6g of demineralized water are put into the reaction kettle successively, and after stirring and dissolving, add 495g (3.66mol) of benzothiazole ), heated in an oil bath to 126°C, reacted for 5.0 hours, cooled to 100°C, added 600ml of purified water, filtered, and the filter residue M was incinerated in an incinerator, and the filtrate was transferred to a reaction kettle, and the temperature was controlled at 35-40°C;

[0060] (2) Preparation of 2,2'-diphenylamine disulfide (DS) by oxidation: Add 1020ml of mixed acid oxidant dropwise at 35-40°C to the solution in step (1), and the oxidation reaction takes 4.0-4.5h After the dropwise addition is completed, stir and react for 2.0 hours after heat preservation, centrifugal separation, filte...

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Abstract

The invention provides a rubber peptizer SS preparation method. The rubber peptizer SS preparation method includes the steps of subjecting benzothiazole and sodium hydroxide to high-temperature decomposition reaction so as to prepare a sodium aminothiophenol solution; dropwise adding a mixed acid solution prepared from water, sulfuric acid and hydrogen peroxide into the sodium aminothiophenol solution at 35-40 DEG C prior to oxidation reaction, and filtering to obtain DS (2,2'-diphenylamine disulphide) after the oxidation reaction is completed; adding the DS and the water into a reaction kettle, adding sodium carbonate, stirring to increase the temperature to 90-95 DEG C, dropwise adding benzoyl chloride for acylation reaction, cooling after the reaction is completed, performing solid-liquid separation and alcohol washing, and drying at 50 DEG C so as to obtain the SS (2,2'-dibenzoyl diphenyl disulfide). The rubber peptizer SS preparation method has the advantages that the raw materials are free of toxicity, cheap and easily available, and a technological process is simple and easy to operate; toxic solvents are unused, and accordingly a preparation workshop is low in toxicity and less polluted; high yield and high quality are achieved, so that the rubber peptizer SS is promising in market prospect; since the alcohol solvents can be recycled, overall cost is low and rubber peptizer SS purity can be above 98%.

Description

technical field [0001] The invention relates to a preparation method of a rubber auxiliary agent, in particular to a preparation method of a rubber peptizer SS. Background technique [0002] Peptizer refers to a substance that enhances the plastic effect of raw rubber and shortens the plasticizing time through chemical action. The peptizer can also be used as a regeneration activator for waste rubber. With the rapid development of the rubber industry and the emergence of energy crisis and energy-saving issues, foreign countries have paid more and more attention to the research and development of plasticizers. When rubber is processed, it is generally necessary to plasticize the raw rubber first, cut off the rubber macromolecular chain to reduce the hardness, increase the plasticity, and then knead and process. If the single use of mechanical plastic or thermal plastication is time-consuming and wastes energy, the efficiency is low. Adding peptizers will enhance the plastica...

Claims

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Application Information

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IPC IPC(8): C07C319/22C07C323/42
CPCC07C319/00C07C319/22C07C319/24C07C323/42C07C323/33
Inventor 史宗浩王飞陈贵宝葛同伟宋风朝李宏喜屈军伟钱娟娟郭同新王志强
Owner WILLING NEW MATERIALS TECH CO LTD
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