This inventor holds 1 USPTO granted patent. Top assignee: Industrial Technology Research Institute. Active years: 1988.
Company Filing History:
Years Active: 1988
Title: Nien-Hsi Chang: Innovator in Polyester Preparation
Introduction
Nien-Hsi Chang is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of polymer chemistry, particularly in the preparation of polyesters. His innovative work has led to advancements in the production processes of these materials.
Latest Patents
Nien-Hsi Chang holds a patent for the "Preparation of polyesters from terephthalic acid." This patent describes a two-stage process for preparing poly(butylene terephthalate). In the first stage, terephthalic acid and 1,4-butanediol are esterified in the presence of a catalytic amount of a catalyst that includes an organo-metallic component, such as an organo-titanate compound or an organo-tin compound, along with a salt component. The second step involves subjecting the esterification product to polycondensation. This method significantly suppresses the formation of tetrahydrofuran and increases the percent conversion of esterification products. Nien-Hsi Chang has 1 patent to his name.
Career Highlights
Nien-Hsi Chang is affiliated with the Industrial Technology Research Institute, where he has been instrumental in advancing research in polymer technology. His work has not only contributed to academic knowledge but has also had practical applications in various industries.
Collaborations
He has collaborated with notable colleagues, including Shen-Nan Tong and Mei-Sui Chen, to further enhance research and development in their field.
Conclusion
Nien-Hsi Chang's innovative approach to polyester preparation exemplifies the impact of research and development in polymer chemistry. His contributions continue to influence the industry and inspire future innovations.