Noritoshi Ishida

Title: Noritoshi Ishida: Innovator in Polyphenylene Chemistry

Introduction

Noritoshi Ishida is a prominent inventor based in Ohmuta, Japan. He has made significant contributions to the field of polyphenylene chemistry, holding a total of 3 patents. His work focuses on improving the production processes of methylene-crosslinked polyphenylene polyisocyanates, which have various industrial applications.

Latest Patents

Ishida's latest patents include innovative processes that enhance the quality and usability of polyphenylene products. One of his notable patents is a method for the production of methylene-crosslinked polyphenylene. This process improves the hue of the polyisocyanate produced by reacting phosgene with a polyamine mixture derived from aniline and formaldehyde. The method involves removing residual phosgene and applying heat treatment in the presence of hydrogen chloride gas. Another significant patent details a fractionation process for a reaction mixture containing methylene bridged polyphenylene polyisocyanate. This process separates the mixture into fractions, focusing on the content of specific isomers while minimizing impurities.

Career Highlights

Noritoshi Ishida is associated with Mitsui Toatsu Chemicals, Incorporated, where he has been instrumental in advancing chemical processes. His expertise in polyphenylene chemistry has positioned him as a key figure in the development of innovative materials.

Collaborations

Ishida has collaborated with notable colleagues, including Zunzi Tashima and Takashi Nagou. These partnerships have contributed to the successful development of his patented processes and have fostered a collaborative environment for innovation.

Conclusion

Noritoshi Ishida's contributions to polyphenylene chemistry through his patents and collaborations highlight his role as an influential inventor in the field. His work continues to impact the industry positively, paving the way for future advancements.