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Preparation method of rubber antiager N-(4-anilinophenyl) pivaloyl amine

A technology of rubber anti-aging agent and aniline phenyl, which is applied in the field of rubber anti-aging agent, can solve the problems of complicated preparation process, insufficient purity, and low yield, and achieve short process flow, reasonable synthesis process route, and high material utilization rate. Effect

Inactive Publication Date: 2019-03-08
LIANYUNGANG REBO CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of preparation method of rubber anti-aging agent N-(4-anilinophenyl) pivalamide, solve the special problem of (4-anilinophenyl) in the prior art The preparation process of valeramide is complicated, the yield is low and the purity is not enough

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  • Preparation method of rubber antiager N-(4-anilinophenyl) pivaloyl amine
  • Preparation method of rubber antiager N-(4-anilinophenyl) pivaloyl amine

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Embodiment Construction

[0034] The technical solution of the present invention will be further described in detail below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following description.

[0035] A kind of preparation method of rubber antioxidant N-(4-anilinophenyl) pivalamide, comprises the steps:

[0036] Step 1. Prepare the organic solvent, 4-aminodiphenylamine, sodium carbonate and pivaloyl chloride in order of 75-90 parts, 35-48 parts, 16-25 parts and 25-35 parts according to the parts by weight, and wait for use;

[0037] Step 2. Mix the organic solvent, 4-aminodiphenylamine and sodium carbonate into a stirring container and stir to mix evenly. Add pivaloyl chloride dropwise under the atmosphere of protective gas. After the dropwise addition, raise the temperature to 35-50°C and stir to react 3- 6h, the organic solvent was reclaimed by distillation under reduced pressure, and the solid was obtained for use;

[0038] Step 3, di...

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Abstract

The invention relates to the technical field of rubber antiagers, in particular to a preparation method of a rubber antiager N-(4-anilinophenyl) pivaloyl amine. The method comprises the following steps of mixing methylbenzene, 4-aminodiphenylamine and sodium carbonate, dropwise adding pivaloyl chlorine into materials in a reaction flask, allowing 4-aminodiphenylamine and pivaloyl chlorine to givean amidation reaction, performing distillation to recover methylbenzene, recycling recovered methylbenzene all the time, and separating and purifying a product. The method solves the problems of a complicated preparation process, low productivity and insufficient purity of the antiger N-(4-anilinophenyl) pivaloyl amine in the prior art. Prepared N-(4-anilinophenyl) pivaloyl amine has higher yieldand purity; a designed synthesis technology is reasonable in path; raw materials are easy to obtain; a technical flow is short; waste gas, waste water and industrial residue are very little and easy to treat; and the product has a significant anti-aging effect in rubber.

Description

technical field [0001] The invention relates to the technical field of rubber anti-aging agents, in particular to a preparation method of rubber anti-aging agent N-(4-anilinophenyl) pivalamide. Background technique [0002] my country is a big country in rubber production, processing, and application. It uses a large amount of various rubber additives. Antioxidant and antiaging agents are also an indispensable type, and the amount is also large. In order to meet the development of my country's rubber industry and polymer material industry Need, must develop more and better anti-oxidant and anti-aging agent. [0003] Rubber anti-aging agent is a chemical added in the rubber production process that can delay the aging of rubber and prolong the service life of rubber. There are many types of anti-aging agents and their functions are different. According to its main function, it can be divided into anti-thermal oxygen aging agent, anti-ozone agent, harmful metal ion inhibitor, ...

Claims

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Application Information

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IPC IPC(8): C07C231/02C07C231/24C07C233/43
CPCC07C231/02C07C231/24C07C233/43
Inventor 何龙柏孙仙平
Owner LIANYUNGANG REBO CHEM CO LTD