Company Filing History:
2 out of 510 
1 out of 944 Years Active: 2015-2020
Title: Chigusa Yamada: Innovator in Polymer Technology
Introduction
Chigusa Yamada is a prominent inventor based in Tokyo, Japan. She has made significant contributions to the field of polymer technology, particularly in the development of modified conjugated diene-based polymers. With a total of 3 patents to her name, Yamada's work has garnered attention for its innovative approaches and practical applications.
Latest Patents
Yamada's latest patents include a modified conjugated diene-based polymer and a method for producing the same. This invention provides a modified conjugated diene-based polymer, wherein the Mooney stress-relaxation rate measured at 110°C is 0.45 or less, and the modification percentage is 75% by mass or more. Another significant patent involves a method for producing a modified conjugated diene polymer, which includes a polymerization step of obtaining a conjugated diene polymer containing a nitrogen atom in a polymer chain and an active end. This is achieved by copolymerizing a conjugated diene compound and a nitrogen atom-containing vinyl compound, or a conjugated diene compound, an aromatic vinyl compound, and a nitrogen atom-containing vinyl compound using an alkali metal compound and/or an alkaline earth metal compound as a polymerization initiator, followed by a modification step of reacting a modifier.
Career Highlights
Chigusa Yamada has worked with notable companies in the industry, including Asahi Kasei Chemicals Corporation and Asahi Kasei Kabushiki Kaisha. Her experience in these organizations has allowed her to refine her expertise in polymer science and contribute to various innovative projects.
Collaborations
Yamada has collaborated with esteemed colleagues such as Junichi Yoshida and Daisuke Hayata. These partnerships have facilitated the exchange of ideas and fostered advancements in their respective fields.
Conclusion
Chigusa Yamada's contributions to polymer technology exemplify her innovative spirit and dedication to advancing the field. Her patents reflect her commitment to developing materials that meet modern demands and enhance industrial applications.