Niichiro Hasegawa

Title: Niichiro Hasegawa: Innovator in Polymerization Techniques

Introduction

Niichiro Hasegawa is a notable inventor based in Joetsu, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the polymerization of vinyl and dienic monomers. With a total of 2 patents to his name, Hasegawa's work has enhanced the efficiency and quality of polymer production.

Latest Patents

Hasegawa's latest patents include a method for the polymerization of vinyl monomers and a method for polymerizing dienic monomers. The first patent describes a novel and improved method for polymerizing vinyl monomers in a reactor. This method involves coating the inner walls of the reactor with an aqueous liquid containing alkali metal or ammonium salts of anionic dyes. The pH of this solution is adjusted to not exceed 7, and the coated surfaces are dried with heat before polymerization. This innovative approach significantly reduces polymer scale deposition, thereby improving both productivity and product quality.

The second patent focuses on the emulsion polymerization of dienic monomers. It outlines a technique to prevent polymer scale deposition on reactor surfaces by applying coating layers of organopolysiloxane. This can be achieved by directly applying organopolysiloxane or using hydrolyzable organosilanes, which undergo hydrolysis-condensation to form the organopolysiloxane in situ. This method also aims to enhance the efficiency of the polymerization process.

Career Highlights

Hasegawa is currently associated with Shin-Etsu Chemical Co., Ltd., a leading company in the chemical industry. His work has been instrumental in advancing polymerization techniques, making significant contributions to the field.

Collaborations

Hasegawa has collaborated with notable colleagues such as Shunichi Koyanagi and Toshihide Shimizu. Their combined expertise has furthered research and development in polymer chemistry.

Conclusion

Niichiro Hasegawa's innovative methods in polymerization have made a lasting impact on the industry. His patents reflect a commitment to improving production processes and product quality in polymer chemistry.