Company Filing History:
Years Active: 1983-1987
Title: Shigeo Yanada: Innovator in Polycarbonate Resins
Introduction
Shigeo Yanada is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of materials science, particularly in the development of polycarbonate resins. With a total of 3 patents to his name, Yanada's work has had a substantial impact on optical materials and precision molding.
Latest Patents
Yanada's latest patents include innovative advancements in copolycarbonate resin technology. One of his notable inventions is a copolycarbonate resin derived from branched chain alkylene bis phenol. This polycarbonate resin exhibits improved flexibility, flowability, and heat resistance, making it particularly useful for optical articles and precision molding materials. The production process involves a solution polymerization method utilizing a bisphenol compound and a substituted alkylenebisphenol compound.
Another significant patent focuses on a transparent optical article produced from a branched polycarbonate resin. This resin has a viscosity average molecular weight ranging from 13,000 to 20,000 and is created in the presence of a polyfunctional organic compound with at least two phenolic hydroxyl groups. The resulting optical article, which includes digital audio discs, video discs, memory discs, and lenses, demonstrates reduced double refraction and enhanced mechanical strength.
Career Highlights
Shigeo Yanada is currently associated with Mitsubishi Gas Chemical Company, Inc., where he continues to innovate in the field of polymer chemistry. His work has been instrumental in advancing the applications of polycarbonate materials in various industries.
Collaborations
Throughout his career, Yanada has collaborated with notable colleagues, including Mituhiko Masumoto and Toshiaki Izumida. These collaborations have further enriched his research and development efforts in the field of materials science.
Conclusion
Shigeo Yanada's contributions to the development of polycarbonate resins have positioned him as a key figure in materials innovation. His patents reflect a commitment to enhancing the performance and applications of optical materials. Yanada's work continues to influence the industry and pave the way for future advancements.