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The preparation method of hindered phenolic antioxidant 330

A technology of hindered phenols and antioxidants, which is applied in the field of preparation of hindered phenols antioxidant 330, can solve the problems of preparation of antioxidant 330 that have not been reported, and achieve easy separation and purification, mild reaction conditions, and cheap and easy raw materials The effect

Active Publication Date: 2014-10-22
RIANLON ZHONGWEI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the preparation of antioxidant 330 by silica-supported heteropolyacid catalysis

Method used

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  • The preparation method of hindered phenolic antioxidant 330
  • The preparation method of hindered phenolic antioxidant 330

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Experimental program
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Effect test

Embodiment 1

[0019] The preparation process of silica-supported phosphotungstic acid catalyst is as follows: add 60kg of superfine silica (2500 mesh) and 40kg of phosphotungstic acid (CAS No.: 12501-23-4) in 200L water, soak for 24 hours at room temperature, and then After filtering, the filter cake was dried at 100°C for 3 hours, and then activated at 200°C for 3 hours to obtain a silica-supported phosphotungstic acid catalyst.

Embodiment 2

[0021] The preparation process of silica-supported phosphotungstic acid catalyst is as follows: add 20kg of ultrafine silica (6000 mesh) and 40kg of phosphotungstic acid (CAS No.: 12501-23-4) to 200L water in sequence, soak for 12 hours at room temperature, and then Filter, dry the filter cake at 100°C for 2 hours, and then bake and activate at 200°C for 2 hours to obtain the silica-supported phosphotungstic acid catalyst.

Embodiment 3

[0023] The preparation process of silica-supported phosphotungstic acid catalyst is as follows: add 100kg of ultrafine silica (1200 mesh) and 20kg of phosphotungstic acid (CAS No.: 12501-23-4) in 200L water in sequence, soak for 36 hours at room temperature, and then Filter, dry the filter cake at 100°C for 4 hours, and then bake and activate at 200°C for 5 hours to obtain the silica-supported phosphotungstic acid catalyst.

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Abstract

The invention relates to a preparation method of a hindered phenol antioxidant 330, which comprises the following steps of: mixing 1,3,5-trichloromethyl-2,4,6-trimethylbenzene and 2,6-ditertbutylphenol at a molar ratio of 1:(3-4); adding a silicon dioxide-loaded phosphotungstic acid catalyst, wherein the dosage of the silicon dioxide-loaded phosphotungstic acid catalyst is 0.5-10% of that of the 1,3,5-trichloromethyl-2,4,6-trimethylbenzene by mass; adding an organic solvent and performing heating reflux reaction for 5-48 hours; filtering to obtain a solid; and re-crystallizing to obtain a target product 1,3,5-trimethyl-2,4,6-tri(3,5-ditertbutyl-4-hydroxybenzyl)benzene. Compared with the existing synthesis method, the method disclosed by the invention has the advantages that the raw material is cheap and easily available, the operation is simple, the reaction conditions are mild, the product is easy to separate and purify, the one-way catalysis life of the catalyst is long, repeated use and regeneration can be realized and the like.

Description

technical field [0001] The invention belongs to a preparation method of a polymer material functional additive, and in particular relates to a preparation method of a hindered phenolic antioxidant 330. Background technique [0002] During the manufacture, storage and processing of polymer materials and the end-use process of plastic products, oxidation reactions will occur due to the action of light, heat, oxygen, etc., resulting in changes in the chemical structure of polymer materials, resulting in deterioration of their mechanical properties, such as tension The tensile strength is reduced, the surface is cracked, and the product is yellowed and discolored. The most common and effective way to suppress or slow down the performance degradation of polymer materials is to add suitable functional additives for polymer materials. [0003] Antioxidants are the most important functional additives for polymer materials, which inhibit the thermo-oxidative degradation of polymer m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/15C07C37/18C07C22/00C07C17/263B01J27/188
Inventor 范小鹏孙春光汤翠祥李海平林旭锋
Owner RIANLON ZHONGWEI NEW MATERIAL CO LTD
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