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Method for preparing rubber or resin multifunctional anti-aging agent

A multi-functional, antioxidant technology, applied in the direction of organic chemistry, etc., can solve problems such as the inability of antioxidants

Inactive Publication Date: 2013-04-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In recent years, with the continuous development of rubber products and polymer materials, a single anti-aging agent cannot meet its needs

Method used

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  • Method for preparing rubber or resin multifunctional anti-aging agent
  • Method for preparing rubber or resin multifunctional anti-aging agent
  • Method for preparing rubber or resin multifunctional anti-aging agent

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with specific embodiments.

[0014] Synthesis of a New Multifunctional Antiaging Agent

[0015] 1.1 Preparation of intermediates

[0016] Add p-phenylenediamine and methyl acrylate to the three-necked flask, the dosage is 1:3.5~1:5.5 (molar ratio), then add glacial acetic acid dropwise (glacial acetic acid: methyl acrylate=5:1 (volume ratio)), During the dropping process, the temperature was slowly raised to 40-80° C. for the reaction, and the reaction process was monitored by TLC (trichloromethane:methanol, v / v=10:1-35:1) on a silica gel plate. After about 10-100 hours, the reaction was stopped, and excess methyl acrylate and glacial acetic acid were removed by rotary evaporation. The resulting residue was subjected to silica gel column chromatography (chloroform: acetone, v / v=10:1-30:1) to obtain a pale yellow oil, which was recrystallized from n-isopropyl ether to obtain a pure intermediate with...

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Abstract

The invention discloses a method for preparing a rubber or resin multifunctional anti-aging agent. The synthesis of the anti-aging agent comprises the following two steps of: synthesizing a highly symmetrical intermediate with a dendritic structure from phenylenediamine and methyl acrylate through a Michael addition reaction; and carrying out an ester exchange reaction on the intermediate and 1,2,2,6,6-pentamethyl-piperidinol to synthesize the anti-aging agent under the condition of taking tetraisopropyl titanate as a catalyst. The anti-aging agent contains heat-resistant oxygen groups and light-stabilizing groups, and when the anti-aging agent is added into rubber or resin, the period of heat oxygen resistance and light aging resistance is delayed.

Description

technical field [0001] The invention relates to the field of material synthesis and preparation, in particular to a method for preparing a rubber or resin anti-light and heat anti-aging agent. Background technique [0002] At present, polymer materials based on rubber or resin are widely used in various fields, and the demand is also increasing rapidly. However, one of the problems affecting the application of polymer materials is that they will age in the environment. Aging means that during the process of processing, storage and use of polymer materials, due to the influence of environmental factors such as oxygen, ozone, light and heat, discoloration, blooming, stickiness, hardening and brittle cracks will occur; at the same time, rubber The mechanical properties are reduced, the strength and elongation are greatly reduced, the air permeability is enhanced, and the dielectric properties are weakened. Therefore, it is of great significance to study the aging resistance o...

Claims

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Application Information

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IPC IPC(8): C07D211/46C08L7/00C08K5/3435
Inventor 周元林范婷婷李银涛
Owner SOUTHWEAT UNIV OF SCI & TECH
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