Patent ID: 9688838
Date: 2017-06-27
CPC Classifications: C07C,C08K

Claim:
1. A process for producing a diisononyl terephthalate plasticizer, involving using a pure terephthalic acid or a derivative thereof and an isononanol mixture with a molar ratio of the terephthalic acid or the derivative to the isononanol mixture ranged between 1:2.2 and 1:3.8 as starting materials for an esterification reaction, and esterifying said terephthalic acid or its derivative and said isononanol mixture in the presence of an esterification catalyst selected from a metal-containing catalyst or an inorganic acid catalyst, to synthesize an esterified product of diisononyl terephthalate used as a plasticizer having a glass transition temperature (Tg) below −75° C.; characterized in that said isononanol mixture is composed of the following components (a)-(g) to 100 mol %: