2-(2-羟基-5-甲基-3-叔丁基苯甲基)-4-甲基-6-叔丁基苯基乙酸酯的合成  

SYNTHESIS OF 2-[1-(2-H YDROXY-3-tert-BUTYL-5-METHYL)-ETHYL]-4-METHYL-6-tert-BUTYLPHENYL ACETATE

作　　者：杜飞[1] 范延超[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《精细石油化工》2011年第3期23-27,共5页Speciality Petrochemicals

摘　　要：以抗氧剂2246和乙酰氯为原料，进行单酚羟基酯化反应，合成了2-（2-羟基-5-甲基-3-叔丁基苯甲基）-4-甲基6叔丁基苯基乙酸酯（简称抗氧剂2246单乙酸酯），作为传统抗氧剂2246的更新换代产品。合成抗氧剂2246单乙酸酯的最佳工艺条件是：n（抗氧剂2246）：n（乙酰氯）：n（三乙胺）=1．00：1．15：1．20，反应温度73～77℃、反应时间4h，合成抗氧剂2246单乙酸酯的原料转化率99．0％，产物选择性98．5％，收率97．0％，产物质量分数99．2％，熔点i01．3～102．5℃。产物结构经IR、1HNMR进行了确证。By performing the thermal aging experiments of the polymeric material 2＇-methylenebis（4-methyl-6-tert-butyl phenol）（2246）, it became a dimmer while ing performance, which caused the polymeric material changed to yellow graduall the defect, the study on 2246 synthesized through esterification acetyl chloride an added antioxidant 2, showing its anti-ag- In order to correct 2-[ 1-（2-hydroxy-3- tert butyl-5-methyl）-ethyl]-4-methyl-6-tert-butylphenyl to replace 2246. This product can prevent from absorbing visible light which is achromatous. At the same time it can form a quinine derivative by absorbing ultraviolet radiation which could inversely transform itself by a exothermic process. Un- der the following optimal conditions： n（2246） ： n（acetyl chloride） ： n（triethylamine）=1. 00 ： 1.15 = 1.20, 73- 77℃, and 4 h, the product was synthesized with the conversion of 98.5%, molar yield of 97.0%, product purity of 99.6% and melting point of 101.3-102.5 ℃. IR,1H NMR confirmed the structure of the product.

关 键 词：双酚单乙酸酯抗氧剂 2  2’-亚甲基双(4-甲基-6-叔丁基苯酚) 乙酰氯 

分 类 号：TQ314.249[化学工程—高聚物工业]