Location History:
- Shiga, JP (1994)
- Yasu-gun, JP (2002)
Company Filing History:
Years Active: 1994-2002
Title: Naofumi Saiuchi: Innovator in Urethane Technologies
Introduction
Naofumi Saiuchi is a notable inventor based in Yasu-gun, Japan. He has made significant contributions to the field of urethane technologies, holding 2 patents that showcase his innovative approach to enhancing paper strength and developing radiation-curable polyurethane emulsions.
Latest Patents
One of Saiuchi's latest patents is titled "Blocked urethane prepolymers as paper wet strength agent." This invention involves producing paper with increased wet strength by adding a water-soluble blocked urethane prepolymer that contains multiple blocked isocyanate groups and hydrophilic groups. The blocking agent used is a phenol compound with an electron-attracting group positioned at the ortho- or para-position. This blocked urethane prepolymer is designed to unblock under conditions typically encountered in the drying sections of conventional paper-making machines.
Another significant patent by Saiuchi is "Radiation-curable polyurethane emulsion compositions." This invention discloses radiation-curable polyurethane emulsion compositions that can be diluted with water. The process involves preparing an emulsion of polyurethane with active amino groups and reacting it, in the presence of water, with an isocyanate compound that has a polymerizable unsaturated group. This method effectively introduces the polymerizable unsaturated group into the polyurethane while overcoming previous challenges related to polymerization and gelation during emulsion preparation. The invention promises to enable the industrial-scale production of these radiation-curable polyurethane emulsions.
Career Highlights
Naofumi Saiuchi is currently associated with Dai-ichi Kogyo Seiyaku Co., Ltd., where he continues to innovate and develop new technologies in the field of urethane chemistry. His work has significantly impacted the paper industry and the development of new materials.
Collaborations
Throughout his career, Saiuchi has collaborated with notable colleagues, including Kazuo Sato and Tadayuki Sugimoto. These collaborations have further enriched his research and development efforts.
Conclusion
Naofumi Saiuchi's contributions to urethane technologies reflect his commitment to innovation and excellence. His patents not only enhance the quality of paper products but also pave the way for advancements in polyurethane applications.