| 摘要 |
PURPOSE: A method for preparing tetrakis(3(3,5-di-tertiary-butyl-4-hydroxyphenyl) propionyl oxymethyl)methane is provided for using the composition as the antioxidant to the polyolefin by synthesizing it from 2,6-di-tertiary-butylphenol and methylacrylate. CONSTITUTION: The method for preparing tetrakis(3(3,5-di-tertiary-butyl-4-hydroxyphenyl) propionyl oxymethyl)methane comprises the first step of performing ester exchange process for penta-erythritol and 3(3,5-di-tertiary-butyl-4-hydroxyphenyl)propionic oxy-methyl)methane in the presence of the catalyst such as organic tin compound, for example, dibutyltin oxide. The preparation method involves the use of the reactive solvent as ethylbenzene, cumene, indane or isobutyl benzene. After the ester exchange process, the tetrakis(3-(3,5-di-tertiary-butyl-4-hydroxyphenyl)propionyl oxymethyl)methane composition is obtained by using the reactive solvent as part of the crystallization solvent to crystallize the resultant product.
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