Toshihiko Kawakubo

Title: The Innovations of Toshihiko Kawakubo

Introduction

Toshihiko Kawakubo is a notable inventor based in Kamisu, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of vinyl chloride type polymers. With a total of 6 patents to his name, Kawakubo's work has had a lasting impact on the industry.

Latest Patents

One of his latest patents is a method for producing vinyl chloride type polymer. This method involves polymerizing a vinyl chloride monomer, or a mixture of a vinyl chloride monomer with a copolymerizable monomer, in an aqueous medium using a polymerization reactor. The process includes charging an aqueous solution of a copolymerized polyether with a weight-average molecular weight of 1,000 to 3,500 into the reactor. The mole ratio of ethylene oxide to propylene oxide is maintained between 10/90 to 60/40, with the copolymerized polyether amounting to 0.005 to 0.050 parts by weight relative to 100 parts by weight of the vinyl chloride monomer.

Career Highlights

Kawakubo is currently associated with Shin-Etsu Chemical Co., Ltd., where he continues to innovate in polymer production techniques. His expertise in this area has led to advancements that enhance the efficiency and effectiveness of vinyl chloride polymer production.

Collaborations

Throughout his career, Kawakubo has collaborated with esteemed colleagues such as Hiroshi Fukudome and Kazuhiro Kumakura. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Toshihiko Kawakubo's contributions to polymer chemistry, particularly in the production of vinyl chloride type polymers, highlight his role as a significant inventor in the field. His ongoing work at Shin-Etsu Chemical Co., Ltd. and his collaborations with other professionals further emphasize his commitment to innovation.