柠檬酸硬脂酸季戊四醇三元共聚蜡状物的研制

以柠檬酸、季戊四醇、硬脂酸为原料,采用直接酯化的两步反应合成了柠檬酸硬脂酸季戊四醇酯蜡,并对反应条件进行了优化。固定季戊四醇为0.1 mol的最佳条件为：第一步反应温度为200℃,时间1 h,硬脂酸用量28 g,催化剂为总质量的0.4%;第二步柠檬酸用量为10 g,反应温度150℃,反应时间3 h。最终产物为蜡状物质,酸值为2.2 mgKOH/g,针入度为0.1 mm,滴熔点为70℃。

Synthesis of Copolymer of Citric Acid Stearic Acid and Pentaerythritol

Citric stearic pentaerythritol ester was synthesized from citric acid,stearic acid and pentaerythritol in two steps.The reaction condition was optimumed as follow： in the first step of the reaction,n（Pentaerythritol）∶n（Stearic acid）=1∶1,the temperature was 200 ℃,reaction time was 1 h,mass fraction of p-toluene sulfonic acid was 0.4 %;in the second step of the reaction,n（citric acid）∶n（Pentaerythritol）=0.48∶1,reaction temperature was 150 ℃,reaction time was 3 h.The final product looks like wax,its character was as follow： acid value was 2.2 mgKOH/g,penertration degree was 0.1 mm,dropping point is 70 ℃.