Thunehiko Tokutomi

Title: Thunehiko Tokutomi: Innovator in Polybutadiene Production

Introduction

Thunehiko Tokutomi is a notable inventor based in Ichihara, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of polybutadiene. His innovative approach has led to advancements in the properties of this important material.

Latest Patents

Thunehiko Tokutomi holds a patent for a process of producing polybutadiene. This process involves the polymerization of 1,3-butadiene in the presence of a specific cis-1,4-polymerization catalyst, followed by continued polymerization with a particular 1,2-polymerization catalyst. The resulting polybutadiene contains 2 to 40% of the 1,2-structure, with a melting point ranging from 110°C to 215°C. It also features 60 to 98% of the cis-1,4-structure and an intrinsic viscosity of 0.9 to 8 in tetraline at 135°C. The vulcanized product of this polybutadiene exhibits improved tear strength, flex-crack resistance, and tensile strength.

Career Highlights

Thunehiko Tokutomi is associated with Ube Industries, Inc., where he has been instrumental in advancing polymer technology. His work has not only contributed to the company's portfolio but has also enhanced the overall quality of polybutadiene products in the market.

Collaborations

Thunehiko has collaborated with notable coworkers such as Shotaro Sugiura and Tetsuro Matsuura. Their combined expertise has fostered a productive environment for innovation and development in polymer science.

Conclusion

Thunehiko Tokutomi's contributions to the field of polybutadiene production highlight his role as a key innovator in polymer chemistry. His patented process and collaboration with esteemed colleagues have paved the way for advancements in material properties, benefiting various industries.