Sk Innovation Co., Ltd.

Sk Geo Centric Co., Ltd.

Yu Hyun Kim

Do Young Kim

Jun Haeng Lee

Sung Won Lee

Ki Yup Kim

Hyun Sik Yang

Ji Hae Park

Joo Hyun Nam

Chul Soon Moon

Ho Seung Lee

Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.

High-viscosity biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and method of preparing the same

Growing community of inventors

Seoul, South Korea

Yu Hyun Kim