Abstract

With an intention to develop base oils with multi-functional properties, about 16 epoxy acyloxy castor polyol esters were prepared. Acyloxy castor polyols were prepared by the acylation of hydroxy functionality of castor fatty acids (acetylated, propionylated, butanoylated and hexanoylated) using kieselguhr-G method followed by reaction with polyols namely trimethylolpropane (TMP), neopentyl glycol (NPG), pentaerythritol (PE) and 2-ethyl hexanol (2-EtH) in 95–98% yields. Acyloxy castor polyol esters were epoxidized at the double bond to yield epoxy acyloxy castor polyol esters in 98–99% yields. The base stocks were characterized by ¹H and ¹³C NMR, ESI–MS. When evaluated for base oil properties, exhibited high viscosity indices (86.27 to 427.01), very low pour points (–52 to –42°C) and high oxidative (30 to 50 min) and thermal (200 to 335°C) stabilities. These base stocks with good viscosity properties can withstand heavy loads, supported by low wear scar diameter. Overall the base stocks with superior properties can find applications right from aviation to marine engine formulations.

中文翻译：

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环氧酰氧基蓖麻多元醇酯：用于航空到船舶配方的多功能基础油

摘要

为了开发具有多功能特性的基础油，制备了约 16 种环氧酰氧基蓖麻多元醇酯。酰氧基蓖麻多元醇是通过使用硅藻土-G 法将蓖麻脂肪酸（乙酰化、丙酰化、丁酰化和己酰化）的羟基官能团酰化，然后与多元醇即三羟甲基丙烷 (TMP)、新戊二醇 (NPG)、季戊四醇 (PE) 反应制备的和 2-乙基己醇 (2-EthH) 的产率为 95–98%。酰氧基蓖麻多元醇酯在双键处环氧化，以 98-99% 的产率产生环氧酰氧基蓖麻多元醇酯。基础油的特点是¹ H 和¹³C NMR，ESI-MS。在评估基础油性能时，表现出高粘度指数（86.27 至 427.01）、极低倾点（–52 至 –42°C）和高氧化（30 至 50 分钟）和热（200 至 335°C）稳定性。这些具有良好粘度特性的基础油可以承受重负荷，并由低磨痕直径提供支持。总体而言，具有卓越性能的基础油可以找到从航空到船用发动机配方的应用。