Silica-based modified anti-aging agent as well as preparation method and application thereof

A silica-based, silica-based technology, applied in the field of rubber antioxidants, can solve the problems of affecting the uniform dispersion of antioxidants, further strengthening of anti-oxidative aging performance, and reducing the protection efficiency of antioxidants, etc., to achieve excellent anti-solvent extraction Good stability and anti-volatility, strong controllability of material properties, and the effect of improving thermal oxygen stability

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although the preparation of macromolecular anti-aging agents and grafting to polymers can reduce the volatilization of anti-aging agents to a certain extent, it will affect the uniform dispersion of anti-aging agents, thereby reducing the protective efficiency of anti-aging agents.
The method of grafting to the surface of nanoparticles not only has a significant effect in improving the anti-extraction and anti-volatility, but also can significantly improve the dispersion performance of the nanoparticles grafted with anti-aging agents in the matrix, but this type of anti-aging agents The anti-oxidative aging performance needs to be further strengthened

Method used

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  • Silica-based modified anti-aging agent as well as preparation method and application thereof
  • Silica-based modified anti-aging agent as well as preparation method and application thereof
  • Silica-based modified anti-aging agent as well as preparation method and application thereof

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preparation example Construction

[0088] The method for preparing a silica-based modified anti-aging agent provided by the invention has the advantages of simple method, easy acquisition of raw materials, strong controllability of material properties, low cost, and is more suitable for industrial application. The obtained silica-based modified anti-aging agent has Excellent resistance to solvent extraction and volatility; high loading capacity of amine compounds, and the loading capacity can be adjusted; and has good hydrophobicity, can be well dispersed in the rubber matrix; can effectively improve the thermal conductivity of rubber stability and thermo-oxidative stability.

[0089] As mentioned above, the fourth aspect of the present invention provides the silica-based modified anti-aging agent prepared by the method described in the second aspect or the third aspect.

[0090]The silica-based modified anti-aging agent prepared by the present invention has a relatively high loading capacity of amine compounds...

Embodiment 1

[0126] It is used to illustrate the preparation of silica-based modified anti-aging agent in the present invention.

[0127] (1) Add ethyl orthosilicate and aminotriethoxysilane to 300ml ethanol in sequence, wherein the molar ratio of ethyl orthosilicate to aminotriethoxysilane is 1:8, and the concentration of the overall silicon element 0.9mol / L, add 10ml of distilled water, stir at 30°C, 500pm for 6h, filter the product and wash with ethanol, and dry to obtain intermediate product A (co-condensed silica);

[0128] (2) Disperse 10 g of dried intermediate product A in 500 ml of toluene, add 6 g of 2-[(4-aminophenyl) amino] benzoic acid and 0.2 g of triethylamine, at 110° C., 300 rpm After stirring for 12 hours, the product was filtered, washed with ethanol, and dried to obtain silica-based modified anti-aging agent S1.

[0129] The average particle diameter of the silica-based modified anti-aging agent S1 is 20-30nm.

[0130] According to the thermogravimetric test, in the a...

Embodiment 2

[0133] It is used to illustrate the preparation of silica-based modified anti-aging agent in the present invention.

[0134] (1) Mix 0.5 mol of γ-glycidyl etheroxypropyltrimethoxysilane and 0.5 mol of 2,4-diaminodiphenylamine, add 0.6 g of triethylamine, and stir at 100°C and 250 rpm for 24 hours to obtain Intermediate product B (functionalized silane coupling agent);

[0135] (2) Ethyl orthosilicate and the intermediate product B are added in 500ml ethanol, wherein the weight ratio of ethyl orthosilicate to the intermediate product B is 1:2, and the overall silicon element concentration is 0.6mol / L, Ammonia water was added to make the pH of the reaction system 8, stirred at 60°C and 300 rpm for 3 hours, the product was filtered and washed with ethanol, dried to obtain silica-based modified anti-aging agent S2.

[0136] After testing, the average particle size of the silica-based modified anti-aging agent S2 is 50-60 nm.

[0137] pass 29 According to the SiNMR test, the pea...

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Abstract

The invention relates to the field of rubber anti-aging agents, and discloses a silica-based modified anti-aging agent and a preparation method and application thereof.The modified anti-aging agent is obtained by modifying silica with the anti-aging agent, the anti-aging agent is an amine compound, the amine compound and silica are coupled through a silane coupling agent for modification, and the modified silica is a modified silica-based modified anti-aging agent. Wherein the amine compound and the silane coupling agent are connected through a chemical bond, the silane coupling agent and the silicon dioxide are connected through a chemical bond, and the chemical bond between the silane coupling agent and the silicon dioxide is formed through a condensation reaction. The silica-based modified anti-aging agent provided by the invention has good volatility resistance and solvent extraction resistance, and can effectively improve the thermal stability and thermal oxidation stability of rubber.

Description

technical field [0001] The invention relates to the field of rubber antioxidants, in particular to a silica-based modified antioxidant, a method for preparing a silica-based modified antioxidant, and a silica-based modified antioxidant prepared by the method . Application of the silica-based modified anti-aging agent in rubber anti-aging. Background technique [0002] Rubber materials are widely used in production and life because of their light weight, good flexibility, good sealing performance, and shock-absorbing and buffering effects. However, the unsaturated bonds existing in the rubber material can easily cause rubber aging, thereby affecting the long-term use of the rubber material. [0003] Adding rubber anti-aging agent is one of the commonly used rubber anti-aging methods. However, due to the small molecular weight of the existing small-molecule anti-aging agents, there are defects in the process of processing and use, such as easy volatilization, easy migration,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K9/04C08K3/36C08L9/06C08K13/04
CPCC08K9/06C08K9/04C08K3/36C08L9/06C08K2201/011C08K2201/005C08L2201/08C08L91/06C08K13/04
Inventor 唐瀚滢解希铭王丽静谭晓村刘苹
Owner CHINA PETROLEUM & CHEM CORP
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