Patent ID: 9587087
Date: 2017-03-07
CPC Classifications: C07C,C08K

Claim:
1. A method for preparing an ester composition comprising: obtaining hybrid branched, non-hybrid unbranched and non-hybrid branched alkyl-substituted terephthalate compounds through esterification reaction by reacting a terephthalic acid, n-butanol and 2-ethyl hexanol, wherein the hybrid branched alkyl-substituted terephthalate compound is present in an amount of 1 to 70% by weight in the ester composition, wherein a weight ratio of the non-hybrid unbranched alkyl-substituted terephthalate compound to the non-hybrid branched alkyl-substituted terephthalate compound is 1:99 to 40:60, wherein the esterification reaction is carried out in the presence of an acid catalyst, and the acid catalyst comprises at least one selected from paratoluenesulfonic acid, methanesulfonic acid, ethanesulfonic acid, propanesulfonic acid and sulfuric acid, and wherein the hybrid branched alkyl-substituted terephthalate compound is represented by Formula 1, the non-hybrid unbranched alkyl-substituted terephthalate compound is represented by Formula 2, and the non-hybrid branched alkyl-substituted terephthalate compound is represented by Formula 3: