树脂催化剂催化合成柠檬酸三丁酯系列增塑剂及其应用

Synthesis of tributyl citrate series plasticizers by using resin catalysts and the applications

采用负载双金属路易斯酸的树脂催化剂催化合成了柠檬酸三丁酯(TBC),再经乙酰化生成乙酰柠檬酸三丁酯(ATBC)、油酰柠檬酸三丁酯(OTBC)、十八碳酰柠檬酸三丁酯(ETBC)。经试验分析,催化剂KC124的催化效果最好,催化活性最强。使用TBC系列增塑剂,PVC样品的力学性能高于邻苯二甲酸二辛酯(DOP)和己二酸二辛酯(DOA),耐低温性能高于DOP和DOA,分子迁移率低,材料的耐久性能好。催化剂KC124使用寿命长,稳定性好。

Tributyl citrate （TBC） was synthesized by using resin catalyst supported bimetallic Lewis acid, and then was acetylated to synthesize acetyl tributyl citrate（ATBC）, oleoyl tributyl cit- rate （OTBC） and octadecanoyl tributyl citrate （ETBC）. The experimental results show that Cata- lyst KC124 has the best catalytic effcct and activity. PVC samples filled with tributyl citrate series plasticizcrs have.better mechanical properties and better low temperature resistance than those filled with plasticizers of octyl phthalate （DOP） and dioctyl adipate （DOA）. Catalyst KC124 has long service life and good stability.