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Preparation method of rubber or resin light stabilizer

A light stabilizer and rubber resin technology, which is applied in the field of chemical stabilizer preparation, can solve problems such as cracking, stickiness, physical and mechanical properties, and reduced chemical properties, and achieve improved light stability, expanded application range, and good anti-aging effect of effect

Inactive Publication Date: 2015-01-21
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the influence of various factors in outdoor applications, especially the effects of light, heat, and oxygen, polymer materials often suffer from aging phenomena such as discoloration, stickiness, and cracks, which eventually lead to a decrease in their physical, mechanical, and chemical properties. , greatly shortening its service life

Method used

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  • Preparation method of rubber or resin light stabilizer
  • Preparation method of rubber or resin light stabilizer
  • Preparation method of rubber or resin light stabilizer

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments;

[0013] A method for preparing a new type of rubber or resin light stabilizer, which can be combined with figure 1 , First is the preparation of piperazine-1,4-methyl malonate. The specific process is: add piperazine hexahydrate, methyl acrylate, and graphene oxide aqueous solution to a three-necked flask and stir vigorously at room temperature. The amount is n( Piperazine hexahydrate): n (methyl acrylate)=1:2.0 to 1:9.0. The reaction process was monitored by thin-layer chromatography silica gel plate TLC (methanol: ethyl acetate, v / v=3.0:1~8.0:1), the reaction was stopped after 0.5-6h reaction, and ethyl acetate was used as the extractant to extract the reaction. The mixture, the combined organic phases are collected, dried with anhydrous sodium sulfate, and the organic solvent is removed by rotary evaporation to obtain a white solid, which is the de...

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Abstract

The invention discloses a preparation method of a rubber or resin light stabilizer. The synthesis of the light stabilizer comprises two steps: firstly, with piperazine hexahydrate and methyl acrylate as raw materials, synthesizing a piperazine light stabilizer through Michael addition reaction under catalysis of graphene oxide; and carrying out transesterification on the stabilizer and 1,2,2,6,6-pentamethyl-4-piperidinol under catalysis of sodium methoxide to obtain the light stabilizer containing piperazine and piperidine functional groups. According to the preparation method disclosed by the invention, the original light stability is improved; meanwhile, the rubber or resin light stabilizer is a high-efficiency thermal antioxidant; and the service life can be prolonged by adding the rubber or resin light stabilizer to rubber or resin.

Description

Technical field [0001] The invention relates to a method for preparing a chemical stabilizer, in particular to a method for preparing a light stabilizer. Background technique [0002] The application of polymer materials based on rubber or resin is wide, especially outdoor applications are increasing. However, in outdoor applications, polymer materials are affected by many factors, especially the effects of light, heat, and oxygen, which often cause aging, such as discoloration, stickiness, and cracking, which ultimately leads to degradation of their physical and mechanical properties and chemical properties. , Greatly shortening its service life. [0003] Natural rubber is the most commonly used base material in rubber products because of its high cost performance. However, because its structure contains unsaturated double bonds, it becomes the weak part of aging. In order to delay or prevent the aging of rubber, it is most often The method used is to add antioxidants during the...

Claims

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Application Information

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IPC IPC(8): C07D211/44C08K5/3462C08L7/00
CPCC07D211/46
Inventor 李银涛周元林肖凤
Owner SOUTHWEAT UNIV OF SCI & TECH
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