Sk Chemicals Co., Ltd.

Hyundai Motor Company

Kia Corporation

Ji-Hun Kim

Kwang-Woo Park

Joong Ki Lee

Yoo Jin Lee

Jung-Taik Hur

Da-Young Hwang

A method for preparing a recycled raw material uses a waste copolyester. The method for preparing a recycled raw material includes (1) depolymerizing a waste copolyester to obtain a first reactant; (2) removing impurities present in the first reactant to obtain a second reactant; (3) distilling the second reactant to obtain a third reactant containing crude recycled bis-2-hydroxyethyl terephthalate and a fourth reactant containing a recycled diol-ester; and (4) mixing the third reactant with an aqueous solvent and recrystallizing it to obtain a fifth reactant containing recycled bis-2-hydroxyethyl terephthalate and a filtrate.

Method for preparing a recycled material using waste copolyester and recycled material composition

This polyester resin comprises a bis(2-hydroxyethyl)terephthalate monomer which is obtained by depolymerization of waste polyester and which has a diethylene glycol ester content adjusted to be a certain level or less. The polyester resin, despite of being a recycled resin, has the same level of quality as the original resin and thus can be used in manufacturing articles in various fields.

Polyester resin using recycled bis(2-hydroxyethyl) terephthalate and article including same

Radiator grill for automobile

Growing community of inventors

Gyeonggi-do, South Korea

Ji-Hun Kim