A kind of preparation method of 2,2-oxalamido-bis[ethyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)] propionate

Abstract

The invention discloses a synthesis method of a metal ion passivator 2,2-oxamido-di[ethyl-3-(3,5-di-tertiary butyl-4-hydroxyphenyl)] propionate with a hindered phenol antioxidant structure. The synthesis method is implemented by taking 3-(3,5-di-tertiary butyl-4-hydroxy)] phenyl propionate and N,N'-di(hydroxyethyl) oxamide as raw materials and taking organic titanium or organic zirconium as a catalyst through two-section temperature-controlled synthesis at a temperature of 150-160 DEG C and at a temperature of 160-190 DEG C. The synthesis method disclosed by the invention has the advantages of short reaction time, no toxic catalyst residue, stable product quality, and the like.

Description

technical field

[0001] The invention belongs to the field of chemical synthesis, and relates to a method for synthesizing a metal ion passivator with a hindered phenol antioxidant structure, in particular to a 2,2-oxalamido-bis[ethyl-3-(3,5- The preparation method of di-tert-butyl-4-hydroxyphenyl)] propionate. Background technique

[0002] When the polymer is in contact with metal, especially copper, even if the polymer contains a large amount of hindered phenolic antioxidant, it cannot inhibit the oxidation reaction caused by the catalysis of copper ions. In order to effectively prevent this reaction, the ideal rubber and plastic products can be produced.

[0003] 2,2-oxalamido-bis[ethyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)]propionate is a metal ion passivator with hindered phenolic antioxidant structure Because of the hindered phenol and oxamide tube energy groups in the molecular structure, it has dual functions of anti-oxidation and metal ion passivation. It is widely...

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