ABSTRACT

Antioxidants are a component of the majority of known polymerous stuffs and consumer properties of products depend on their efficacy. Antioxidants of phenolic structure are additives to polymers because of high performance to protect polymers from thermal-oxidative degradation processes. From this class of stabilizers the most widespread are derivatives of a methyl ester 3-(3’,5’-di-tert.buyil-4’-hylroxyphenyl)-propionic acid, productions which are based on ester exchanges polyatomic alcohols. To the most significant is pentaeritril-tetrakis-3-(3’,5’-di-tert.buyil-4’- hylroxyphenyl)-propionate. From the beginning of works on synthesis of derivatives of a methyl ester 3-(3’,5’-di-tert.buyil-4’-hylroxyphenyl)- propionic acid on the present are executed a series of basic researches on catalysis and technology. These workings out can appear perspective for improvement of technology on the basis of building of continuous process of reception of a methyl ester 3-(3’,5’-di-tert.buyil-4’-hylroxyphenyl)- propionic acid. In the conditions of catalysis with use of potassium or sodium hydroxides a methyl ester 3-(3’,5’-di-tert.buyil-4’-hylroxyphenyl)- propionic acid is formed with yields to 98%. That allows using a main product further in ester exchange by pentaerythritol. In this technology power-intensive stages of allocation by fractionation in vacuo and stages of use of solvents that can render positive influences on the cost price and an ecological situation by production of the specified antioxidant are excluded. In the present work the basic results of researches of reaction of alkylation are stated 2,6-di-tert.butylphenol by methyl acrylate on the basis of computer modeling and experimental data.