Company Filing History:
5 out of 1,851 
4 out of 46 
1 out of 2 Years Active: 1983-1988
Title: Hsiang-ning Sun: Innovator in Epoxide and Carbon Dioxide Polymerization
Introduction
Hsiang-ning Sun is a notable inventor based in Media, PA (US), recognized for his significant contributions to the field of polymer chemistry. With a total of 10 patents to his name, he has made remarkable advancements in the utilization of catalysts for the copolymerization of epoxides and carbon dioxide.
Latest Patents
Among his latest patents is the innovation titled "Reduction of catalyst usage in epoxide/CO.sub.2 polymerization." This patent highlights the increased catalyst efficiency of zinc carboxylate catalysts in the copolymerization process, achieved by incorporating a small amount of specific diepoxides into the reaction. Another significant patent is "Soluble epoxide/carbon dioxide copolymerization catalysts," which describes the preparation of catalysts that are soluble in various solvents. These catalysts are created by reacting zinc compounds with anhydrides in the presence of an alcohol or by reacting zinc salts with a monoester of a dicarboxylic acid. This innovation allows for the addition of catalysts as a solution to a mixture of epoxides and carbon dioxide, facilitating the production of polyalkylene carbonates.
Career Highlights
Hsiang-ning Sun has had a distinguished career, working with prominent companies such as Atlantic Richfield Company and Arco Chemical Company. His work has significantly impacted the development of new materials and processes in the chemical industry.
Collaborations
Throughout his career, Hsiang-ning Sun has collaborated with esteemed colleagues, including Michael J Cannarsa and Haven S Kesling, Jr. Their joint efforts have contributed to advancements in polymer chemistry and catalysis.
Conclusion
Hsiang-ning Sun's innovative work in the field of epoxide and carbon dioxide polymerization has led to significant advancements in catalyst efficiency and material production. His contributions continue to influence the chemical industry and inspire future innovations.
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