Kunitaka Yamada

Title: Kunitaka Yamada: Innovator in Polyethylene Production

Introduction

Kunitaka Yamada is a notable inventor based in Yokkaichi, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of polyethylene. His innovative work has led to the development of a unique method for producing polyethylene with specific structural characteristics.

Latest Patents

Kunitaka Yamada holds a patent for a polyethylene and method of production thereof. This polyethylene features 1 to 60 methyl branches and 1 to 60 hexyl or higher branches per 1000 carbon atoms. It has a g-value of 0.5 to 0.8 and a limiting viscosity [.eta.] of 0.005 to 20.0 dl/g, measured at 140°C in o-dichlorobenzene. The method involves polymerizing ethylene using a catalyst system that includes a coordination nickel compound of zero- or two-valent nickel and an aminobis(imino)phosphorane.

Career Highlights

Kunitaka Yamada is associated with Tosoh Corporation, where he has been able to apply his expertise in polymer production. His work has not only advanced the company's capabilities but has also contributed to the broader field of materials science.

Collaborations

He has collaborated with notable coworkers such as Akihiro Yano and Yutaka Naito, further enhancing the innovative environment at Tosoh Corporation.

Conclusion

Kunitaka Yamada's contributions to polyethylene production exemplify the impact of innovative thinking in the field of polymer chemistry. His patent reflects a significant advancement in the production methods of polyethylene, showcasing his role as a key inventor in this area.