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Long-acting anti-aging agent as well as preparation method and application thereof

An anti-aging agent and long-acting technology, which is applied in the field of long-acting anti-aging agents and its preparation, can solve the problems of shortening the protective effect duration of anti-aging agents, migration and volatilization of anti-aging agents, and deterioration of the appearance of rubber products, so as to increase the protection effect, prevention of migration and volatilization, effect of increasing molecular weight

Pending Publication Date: 2020-07-10
江西宝弘纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the chemical structures of different antiaging agents are different, compared with rubber molecules, the molecular weight of antiaging agents is generally smaller (such as phenol or p-phenylenediamine), and the solubility in rubber is low, which is easy to cause antiaging agents in the rubber molecule. The migration and volatilization in the rubber matrix will eventually accumulate on the surface of the rubber product, resulting in blooming, which not only leads to the deterioration of the appearance of the rubber product, but also shortens the duration of the protective effect of the anti-aging agent

Method used

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  • Long-acting anti-aging agent as well as preparation method and application thereof
  • Long-acting anti-aging agent as well as preparation method and application thereof
  • Long-acting anti-aging agent as well as preparation method and application thereof

Examples

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preparation example Construction

[0029] The invention provides a kind of preparation method of long-acting antiaging agent, comprises the following steps:

[0030] Refined lignin, phenol and p-phenylenediamine are subjected to condensation reaction under the conditions of organic auxiliary agent, catalyst and water to obtain long-acting antiaging agent.

[0031] In the present invention, the preparation method of the refined lignin preferably includes the following steps:

[0032] Activating lignin to obtain activated lignin;

[0033] The activated lignin is refined to obtain refined lignin.

[0034] In the present invention, lignin is preferably activated to obtain activated lignin. In the present invention, there is no special requirement on the type of lignin, and the lignin well-known to those skilled in the art can be used. In an embodiment of the present invention, the lignin is specifically coniferous lignin, broad-leaved lignin or grass lignin.

[0035] Before the activation, the present invention...

Embodiment 1

[0058] Dissolve 50 g of coniferous lignin with 200 mL of NaOH solution with a concentration of 1 mol / L, and adjust the pH to 13 by continuously adding sodium hydroxide solution dropwise, stir at room temperature for 15 min at a stirring speed of 400 r / min, filter with suction, and collect the filtrate to obtain lignin solution;

[0059] 259g of lignin solution was ultrasonically oscillated for 15min, the ultrasonic oscillating power was 80W, the temperature was 20°C, and then 1mol / L HCl solution was added until the pH value of the solution reached 3, stirred for 5min at a stirring speed of 400r / min, filtered and collected Precipitate to obtain activated lignin;

[0060] Add 35g of activated lignin to a mixed solution of 90g of pyridine, 10g of glacial acetic acid and 40g of water (the mass ratio of pyridine, glacial acetic acid and water is 9:1:4), and stir at a stirring speed of 500r / min until completely dissolved , add 91g chloroform, wherein, the mass ratio of activated li...

Embodiment 2

[0065] Dissolve 50g of coniferous lignin with 200mL of NaOH solution with a concentration of 1mol / L, and adjust the pH to 14 by continuing to add the above sodium hydroxide solution dropwise, stir at room temperature for 20min at a stirring speed of 400r / min, filter with suction, and collect the filtrate Obtain lignin solution;

[0066] 259g of lignin solution was ultrasonically oscillated for 10min at a power of 100W and a temperature of 25°C, then 1mol / L HCl solution was added until the pH value of the solution reached 4, stirred for 5min at a stirring speed of 500r / min, filtered and collected Precipitate to obtain activated lignin solid;

[0067] Add 35g of activated lignin solids to a mixed solution of 90g of pyridine, 10g of glacial acetic acid and 40g of water (the mass ratio of pyridine, glacial acetic acid and water is 9:1:4), and stir at a stirring speed of 500r / min until complete Dissolve, add 91g chloroform, wherein, the mass ratio of activated lignin solid, mixed ...

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Abstract

The invention relates to the technical field of anti-aging agents, in particular to a long-acting anti-aging agent and a preparation method and application thereof. According to the invention, refinedlignin, phenol and p-phenylenediamine are used as raw materials; the molecular structure of the long-acting anti-aging agent prepared through the condensation reaction contains lignin, phenol and p-phenylenediamine groups, the lignin has a three-dimensional network macromolecular structure so that the molecular weight of the long-acting anti-aging agent can be effectively improved, the long-acting anti-aging agent is prevented from migrating out and volatilizing in a rubber product, and the lasting time of the protection effect of the anti-aging agent is prolonged. Moreover, the lignin molecular structure contains rich aromatic ring structures, aliphatic and aromatic hydroxyl groups and quinonyl active groups, so that the solubility of the long-acting anti-aging agent in rubber products is also improved, the dosage of the anti-aging agent can be increased to a certain extent, and the protection effect is improved.

Description

technical field [0001] The invention relates to the technical field of anti-aging agents, in particular to a long-acting anti-aging agent and its preparation method and application. Background technique [0002] During the processing, storage and use of rubber products, due to the influence of external environmental factors, the performance will gradually deteriorate, and even lose the function of use. This phenomenon is the aging of rubber products. The aging of rubber products is affected by many factors, among which factors such as heat, light and mechanical stress have a greater impact on the aging of rubber products. [0003] At present, there are hundreds of aging protection products for rubber products on the market. However, although the chemical structures of different antiaging agents are different, compared with rubber molecules, the molecular weight of antiaging agents is generally smaller (such as phenol or p-phenylenediamine), and the solubility in rubber is l...

Claims

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Application Information

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IPC IPC(8): C08H7/00C08L97/00
CPCC08H6/00C08L97/005
Inventor 刘坤吉徐前进
Owner 江西宝弘纳米科技有限公司
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