Company Filing History:
Years Active: 1994-2002
Title: Nobuyuki Murai: Innovator in Aqueous Pigment Dispersion and Writing Board Ink Composition
Introduction
Nobuyuki Murai is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of pigment dispersion and ink composition, holding a total of 2 patents. His work focuses on improving the stability and performance of aqueous pigment dispersions and writing board ink compositions.
Latest Patents
Murai's latest patents include an innovative aqueous pigment dispersion and a writing board ink composition. The aqueous pigment dispersion is designed to enhance dispersing stability, ensuring that carbon black maintains appropriate initial and long-term dispersing properties in water. This invention also introduces a raw material for ink-jet ink that improves printing density when potassium ions replace alkali metal cations. The dispersion contains surface modified carbon black, achieved through wet-oxidizing carbon black using hypohalous acid and/or its salts, with a concentration of alkali metal cation not exceeding 2% by weight.
The writing board ink composition features a medium made from a lower alcohol solvent, which includes an alcohol-soluble polymer, a scraping agent, a surfactant, and a diketopyrrolopyrrole pigment with an ultrafine particle size of not more than 0.2 µm. This composition remains stable over time, preventing unclear writing and loss of erasability, even with a high resin content.
Career Highlights
Murai is currently associated with Orient Chemical Industries, Ltd., where he continues to innovate in the field of chemical engineering. His work has had a significant impact on the development of high-performance inks and dispersions.
Collaborations
Throughout his career, Murai has collaborated with esteemed colleagues such as Toshiyuki Nagasawa and Kazuo Goda. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
Nobuyuki Murai's contributions to aqueous pigment dispersion and writing board ink composition highlight his innovative spirit and dedication to improving product performance. His patents reflect a commitment to advancing technology in the chemical industry.