| abstract |
The present invention relates to a polyester resin and a method for manufacturing the polyester resin. The polyester resin comprises: a dicarboxylic acid residue containing terephthalic acid; and a diol residue containing isosorbide, cyclohexane dimethanol, and a remainder of other diol compounds, wherein the polyester resin contains a zinc-based catalyst and a phosphorous-based stabilizer, and has a specific intrinsic viscosity and melting point. The method for manufacturing the polyester resin comprises the steps of: esterification-reacting a diol ingredient, which contains the isosorbide, the cyclohexane dimethanol, and the reminder of other diol compounds, with the dicarboxilic acid ingredient containing the terephthalic acid, in the presence of an esterification reaction catalyst containing a zinc-based compound; adding the phosphorous-based stabilizer when the esterification reaction has reached at least 80%; and polycondensation-reacting a product of the esterification reaction. |