Hitoshi Ohba

Title: Hitoshi Ohba: Innovator in Polymerization Techniques

Introduction

Hitoshi Ohba is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the area of vinyl chloride polymerization. With a total of 2 patents, his work has had a lasting impact on the industry.

Latest Patents

Ohba's latest patents include a method for the polymerization of vinyl chloride monomer in an aqueous medium. This invention provides an improvement in the suspension polymerization process, allowing for a significant reduction in polymer scale deposition on reactor walls. The method involves admixing the aqueous polymerization medium with a water-soluble crosslinked copolymer of an unsaturated carboxylic acid monomer and a non-ionic surface active agent.

Another notable patent is the process for producing an aqueous suspension containing an organic azo compound. This stable suspension is formed by dissolving an organic azo compound in an organic solvent, emulsifying the solution with water and dispersing agents, and then removing the organic solvent under reduced pressure. This process ensures that the suspension contains no organic solvent and minimizes foam, which can hinder polymerization.

Career Highlights

Hitoshi Ohba has worked with prominent companies in the chemical industry, including Wako Pure Chemical Industries, Inc. and Shin-Etsu Chemical Co., Ltd. His experience in these organizations has contributed to his expertise in polymerization techniques and innovations.

Collaborations

Ohba has collaborated with notable colleagues such as Motoaki Tanaka and Takanori Toyama. These partnerships have likely enriched his research and development efforts in the field of polymer chemistry.

Conclusion

Hitoshi Ohba's contributions to polymerization techniques have established him as a key figure in the field. His innovative patents and collaborations reflect his commitment to advancing polymer chemistry.