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Preparation method of anti-aging agent for butadiene-nitrile rubber

A technology of nitrile rubber and anti-aging agent, which is applied in the field of rubber additive preparation, which can solve the problems of reducing the service life of nitrile rubber, becoming hard and brittle, and destroying the elastic structure of rubber, so as to achieve less environmental pollution and good anti-aging effect , the effect of improving economic efficiency

Inactive Publication Date: 2018-07-20
昕中和成都胶业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the thermo-oxidative aging process of nitrile rubber, the products after chain breaking are mainly interwoven together, which destroys the elastic structure of the rubber, becomes hard and brittle, and greatly reduces the service life of nitrile rubber.

Method used

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  • Preparation method of anti-aging agent for butadiene-nitrile rubber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention provides a kind of antioxidant preparation method that is used for nitrile rubber, and concrete operation steps are as follows:

[0034] Step 1, add N-(4-methylphenyl) 2-N'-(1,3-dimethylbutyl) p-phenylenediamine antioxidant into ethanol organic solvent and stir evenly, then add vinyl bis Stearamide is mixed evenly to obtain a mixed solution;

[0035] Step 2, under stirring conditions, add water and ethyl acrylate to the mixed solution prepared in the step 1, after mixing evenly, continue to add p-hydroxyanisole dropwise, control the reaction temperature to 50°C; the dropping time is 20min, the stirring speed is 80r / min;

[0036] Step 3: After the p-hydroxyanisole is added dropwise in step 2, the temperature is raised to 70°C, and the temperature rise rate is controlled to be 2°C / min. After the temperature is raised to 70°C, the reaction is continued for 5 hours, and then cooled to room temperature. After extraction, The finished product is obtained after...

Embodiment 2

[0045] The invention provides a kind of antioxidant preparation method that is used for nitrile rubber, and concrete operation steps are as follows:

[0046] Step 1, add N-(4-methylphenyl) 2-N'-(1,3-dimethylbutyl) p-phenylenediamine antioxidant into ethanol organic solvent and stir evenly, then add vinyl bis Stearamide is mixed evenly to obtain a mixed solution;

[0047] Step 2, under stirring conditions, add water and ethyl acrylate to the mixed solution prepared in the step 1, after mixing evenly, continue to add p-hydroxyanisole dropwise, control the reaction temperature to 50°C; the dropping time is 30min, the stirring speed is 90r / min;

[0048] Step 3, after the p-hydroxyanisole was added dropwise in step 2, the temperature was raised to 70°C, and the heating rate was controlled to be 2°C / min. After the temperature was raised to 70°C, the reaction was continued for 8 hours, and then cooled to room temperature, after extraction, The finished product is obtained after was...

Embodiment 3

[0057] The invention provides a kind of antioxidant preparation method that is used for nitrile rubber, and concrete operation steps are as follows:

[0058] Step 1, add N-(4-methylphenyl) 2-N'-(1,3-dimethylbutyl) p-phenylenediamine antioxidant into ethanol organic solvent and stir evenly, then add vinyl bis Stearamide is mixed evenly to obtain a mixed solution;

[0059] Step 2, under stirring conditions, add water and ethyl acrylate to the mixed solution prepared in step 1, after mixing evenly, continue to drop p-hydroxyanisole, control the reaction temperature to 50 °C; the dropping time is 25min, the stirring speed is 85r / min;

[0060] Step 3: After the p-hydroxyanisole is added dropwise in step 2, the temperature is raised to 70°C, and the temperature rise rate is controlled to be 2°C / min. After the temperature is raised to 70°C, the reaction is continued for 6 hours, and then cooled to room temperature. After extraction, The finished product is obtained after washing an...

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Abstract

The invention discloses a preparation method of an anti-aging agent for butadiene-nitrile rubber. The preparation method comprises the following specific operation steps: adding N-(4-methylphenyl)2-N'-(1,3-dimethylbutyl)p-phenylenediamine anti-aging agent into an ethanol organic solvent, stirring the components uniformly, then adding vinyl distearamide, and mixing the components uniformly to obtain a mixed solution; adding water and ethyl acrylate into the mixed solution while stirring, dropwise adding p-hydroxyanisole after the mixture is uniformly mixed, and controlling the reaction temperature to be 50 DEG C; after the p-hydroxyanisole is completely added dropwise, raising the temperature to 70 DEG C, continuing reaction, then lowering the temperature to room temperature, and carrying out extraction, washing and drying to obtain a finished product. The preparation method provided by the invention has simple overall steps, can finish the preparation of the anti-aging agent at a low temperature and in a short time, greatly reduces the preparation cost, and is beneficial to improving the economic benefit.

Description

technical field [0001] The invention relates to a preparation method of a rubber auxiliary agent, in particular to a preparation method of an anti-aging agent for nitrile rubber. Background technique [0002] Nitrile rubber is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance and high wear resistance. During long-term storage and use of rubber and its products, due to the effects of heat, oxygen, ozone, variable-valent metal ions, mechanical stress, light, high-energy rays, and other chemical substances and molds, etc., they will gradually become sticky and change. Hard and brittle or cracked. This decrease in physical and mechanical properties and elasticity over time is called aging. [0003] Thermal oxygen aging, increasing the temperature can cause thermal cracking or thermal crosslinking of rubber, but the basic function of heat is activation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/18C08K5/20C08K5/06C08K5/101C08L9/02
CPCC08K5/18C08K5/06C08K5/101C08K5/20C08L9/02
Inventor 郭克富李强刘树奇
Owner 昕中和成都胶业有限公司
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