Location History:
- Chungcheongnam-Do, KR (2015)
- Cheonan-si, KR (2016 - 2017)
Company Filing History:
6 out of 24 
5 out of 5 
2 out of 61 Years Active: 2015-2017
Title: Ki Chull Yun: Innovator in Biodegradable Polyester Copolymers
Introduction
Ki Chull Yun is a prominent inventor based in Cheonan-si, South Korea. He has made significant contributions to the field of biodegradable materials, holding a total of 8 patents. His work focuses on the development of innovative methods for producing biodegradable aliphatic/aromatic polyester copolymers.
Latest Patents
One of his latest patents is a method for continuously preparing biodegradable aliphatic/aromatic polyester copolymer. This method involves performing a first esterification reaction of an aliphatic dihydroxy compound and an aliphatic dicarboxylic acid at a temperature of 185°C or less. The process continues with a second esterification reaction of the reaction product obtained from the first reaction. A pre-polymer is then obtained through a first polycondensation reaction, followed by a continuous polycondensation reaction where an aromatic carboxylic acid is added. This innovative method reduces the amount of aliphatic dihydroxy compound used, thereby lowering manufacturing costs.
Another significant patent by Yun is a method for preparing a biodegradable polyester copolymer. This method includes a prepolymerization step where a dicarboxylic acid compound, a diol compound, and an aromatic branching agent are polymerized at temperatures between 160-220°C to produce a prepolymer. This is followed by a condensation polymerization step performed at 200-250°C under a vacuum pressure of 0.1 to 2 Torr.
Career Highlights
Ki Chull Yun has worked with notable companies in the chemical industry, including Lotte Fine Chemical Co., Ltd. and S-enpol Co., Ltd. His experience in these organizations has contributed to his expertise in polymer chemistry and biodegradable materials.
Collaborations
Throughout his career, Yun has collaborated with esteemed colleagues such as Gyung Don Kang and Sang Yob Kim. These partnerships have fostered innovation and advancement in the field of biodegradable polymers.
Conclusion
Ki Chull Yun is a distinguished inventor whose work in biodegradable polyester copolymers has the potential to significantly impact environmental sustainability. His innovative methods and collaborations highlight his commitment to advancing the field of polymer science.