Location History:
- Zhejiang, CN (2021 - 2022)
- Shaoxing, CN (2021 - 2022)
Company Filing History:
7 out of 29 
6 out of 1,099 
3 out of 7 Years Active: 2021-2024
Title: Innovations of Qichuan Li: A Pioneer in Polyamide and Polyphenylene Sulfide Resins
Introduction
Qichuan Li is a notable inventor based in Zhejiang, China. He has made significant contributions to the field of materials science, particularly in the development of advanced resins. With a total of 7 patents to his name, his work has implications for various industries, including automotive and electronics.
Latest Patents
One of Qichuan Li's latest patents is for a semi-aromatic polyamide resin and its preparation method. This innovation involves a polymerization reaction using a diamine, a dibasic acid, and a monoacid as main raw materials, along with a special end-capping agent. The resulting semi-aromatic polyamide exhibits excellent thermal stability, a yellowness index of less than 20, a glass transition temperature of 90° C. or above, and a melting point of 300° C. or above. This material is particularly useful for spare parts in fuel pipelines for automobiles and in electronic applications such as LED panels.
Another significant patent is for the preparation method of polyphenylene sulfide resin. This method utilizes a sulfur-containing compound, an alkaline substance, and p-dichlorobenzene as raw materials, with a fatty acid serving as a polycondensation aid. The process yields a primary polyphenylene sulfide that, after high-temperature reaction with a terminal-group adjusting agent, results in a resin characterized by high reactivity, high melting crystallization temperature, and excellent thermal stability. This resin can be directly used for extrusion and injection molding.
Career Highlights
Qichuan Li has worked with prominent organizations, including Zhejiang Nhu Company Ltd. and Zhejiang University. His experience in these institutions has allowed him to refine his expertise in materials science and contribute to innovative research and development.
Collaborations
Throughout his career, Qichuan Li has collaborated with notable colleagues, including Baishan Hu and Hong Yin. These partnerships have fostered a collaborative environment that enhances the innovation process.
Conclusion
Qichuan Li's contributions to the field of materials science, particularly through his patents on semi-aromatic polyamide and polyphenylene sulfide resins, highlight his role as a leading inventor. His work not only advances the technology in these areas but also has practical applications