Hiroki Kawaguchi

Title: Innovations by Hiroki Kawaguchi

Introduction

Hiroki Kawaguchi is a notable inventor based in Wakayama, Japan. He has made significant contributions to the field of water-based pigment dispersions. With a total of 2 patents, his work focuses on enhancing the properties of pigment dispersions used in various applications.

Latest Patents

Kawaguchi's latest patents include innovative formulations for aqueous pigment dispersions. The first patent describes a water-based pigment dispersion that contains a polymer dispersant and a pigment. This polymer dispersant is created by crosslinking a carboxy group-containing water-insoluble polymer with a water-insoluble polyfunctional epoxy compound. The invention ensures excellent redispersibility, preventing solidification in ink ejection nozzles and providing good storage stability under high-temperature conditions. The second patent also relates to a water-based pigment dispersion, emphasizing excellent storage stability and ejection properties while maintaining good water resistance. This formulation includes a polymer dispersant that is a water-insoluble polymer with carboxy groups, partially neutralized with an alkali metal hydroxide.

Career Highlights

Kawaguchi is currently employed at Kao Corporation, where he continues to develop innovative solutions in the field of pigment dispersions. His work has been instrumental in advancing the technology used in various applications, particularly in the ink industry.

Collaborations

Some of his notable coworkers include Yusuke Shimizu and Koji Azuma, who collaborate with him on various projects at Kao Corporation.

Conclusion

Hiroki Kawaguchi's contributions to the field of water-based pigment dispersions highlight his innovative spirit and dedication to advancing technology. His patents reflect a commitment to improving product performance and stability in practical applications.