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A kind of rubber antioxidant and preparation method thereof

A technology of rubber anti-aging agent and amine anti-aging agent, which is applied in the field of rubber anti-aging agent, and can solve the problems affecting the mechanism of anti-aging agent, different molecular volumes, environmental pollution, etc.

Active Publication Date: 2020-07-28
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Antiaging agents with different molecular structures have different molecular volumes due to different molecular weights, and then their mobility in the macromolecular network will be different, which will affect the mechanism of action of the antiaging agent in the rubber compound. The solvent extraction performance and migration speed will also be different, which will affect the anti-aging effect of the anti-aging agent
The migration of anti-aging agent not only weakens the aging effect, but also causes a waste of anti-aging agent, resulting in certain economic losses and pollution to the environment

Method used

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  • A kind of rubber antioxidant and preparation method thereof
  • A kind of rubber antioxidant and preparation method thereof
  • A kind of rubber antioxidant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of G-ESBR

[0033] G-ESBR was prepared by emulsion polymerization, and the polymerization temperature was 5°C. In the reaction kettle, put DW, DPR aqueous solution, electrolyte aqueous solution (KOH, H 3 PO4, EDTA and Tamol-N mixed aqueous solution), Fe-EDTA aqueous solution, SFS aqueous solution and the mixed solution of monomer ST and GMA, then the reaction kettle is sealed. Vacuumize and fill the sealed reactor with nitrogen for 3 rounds to replace the air atmosphere in the reactor with nitrogen atmosphere. Then inject BD into the kettle, and put the reaction kettle into the polymerization reaction water bath for stirring. After 2 hours, the reactor was taken out, the oxygen scavenger SHS and the initiator PMH were injected, and put back into the reaction water bath to start the polymerization reaction. During the polymerization process, samples were taken regularly, and the conversion rate of the polymerization reaction was calculated by measuring...

Embodiment 2

[0045] (1) Preparation of G-ESBR

[0046] G-ESBR was prepared according to the method described in Example 1.

[0047] (2) crude product purification

[0048] Dissolve G-ESBR in xylene at room temperature. After G-ESBR is completely dissolved, transfer the entire solution to the reactor. At the same time, add anti-aging agent p-aminodiphenylamine PPDA and catalyst triethylenediamine to control G-ESBR The concentration of the anti-aging agent PPDA is 2% of the total, the concentration of the corresponding anti-aging agent PPDA is 0.67% of the total, and the concentration of triethylenediamine is 0.2% of the total. The stirring speed in the vessel was 200 rpm, the reaction was continued for 48 hours, and the heating was stopped to obtain a crude product.

[0049] (3) Separation and purification of reaction products

[0050] Prepare a flocculation detergent methanol six times the volume of the reaction solution, pour the reaction solution into the flocculation detergent for fl...

Embodiment 3

[0054] (1) Preparation of G-ESBR

[0055] G-ESBR was prepared according to the method described in Example 1.

[0056] (2) crude product purification

[0057] Dissolve G-ESBR in xylene at room temperature. After G-ESBR is completely dissolved, transfer the entire solution to the reactor. At the same time, add anti-aging agent p-aminodiphenylamine PPDA and catalyst triethylenediamine to control G-ESBR The concentration of the anti-aging agent PPDA is 3% of the whole, the concentration of the corresponding anti-aging agent PPDA is 1% of the whole, and the concentration of triethylenediamine is 0.2% of the whole. The internal stirring speed was 200 rpm, the reaction was continued for 48 hours, and the heating was stopped to obtain a crude product.

[0058] (3) Separation and purification of reaction products

[0059] Prepare a flocculation detergent methanol six times the volume of the reaction solution, pour the reaction solution into the flocculation detergent for flocculati...

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Abstract

The invention discloses a rubber antioxidant and a preparation method thereof. The rubber antioxidant is prepared by adopting epoxidized styrene butadiene rubber as the carrier for reaction with an amine anti-aging agent. The specific preparation method includes: dissolving epoxidized styrene butadiene rubber in a solvent at room temperature, adding the amine anti-aging agent and a catalyst, performing heating and stirring for reaction to obtain a crude product, then conducting flocculation and washing with a flocculation washing agent, conducting phase splitting and pumping filtration to obtain a solid product, and finally performing drying. Compared with the traditional antioxidants, the rubber antioxidant prepared by the method provided by the invention has the characteristics of good stability, low mobility and good later anti-aging performance.

Description

technical field [0001] The invention relates to the field of rubber anti-aging agents, and more particularly relates to a novel rubber anti-aging agent prepared by using epoxidized styrene-butadiene rubber as a carrier and a preparation method thereof. Background technique [0002] During the processing, storage and use of rubber, due to the comprehensive influence of internal and external factors, there will be aging phenomena such as softening, stickiness, hardening, cracking, brittleness, spots, mildew, loss of luster, color change, etc. Rubber anti-aging Antioxidant is a substance that prevents or delays the aging of rubber. [0003] p-Phenylenediamine anti-aging agent is an excellent general-purpose anti-aging agent for natural rubber and synthetic rubber. Obvious passivation effect, is the most commonly used anti-aging agent category in the tire industry. [0004] Antiaging agents with different molecular structures have different molecular volumes due to different m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/32C08F236/14C08L15/00C08L7/00C08L9/02C08L91/06C08K13/02C08K3/04C08K3/22C08K5/09
CPCC08F8/32C08K2003/2296C08L7/00C08L9/02C08L15/00C08L2205/035C08F236/14C08L91/06C08K13/02C08K3/04C08K3/22C08K5/09
Inventor 张立群樊轩胡国华王润国孙敏利许文集郑文华刘毅
Owner BEIJING UNIV OF CHEM TECH
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