Company Filing History:
6 out of 1,379 
2 out of 1,788 Years Active: 1989-2002
Title: Kazuo Hisamatsu: Innovator in Electrostatic Image Developing Toners
Introduction
Kazuo Hisamatsu is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of electrostatic image developing toners, holding a total of eight patents. His innovative work has advanced the technology used in toner production, particularly through the development of urethane-modified polyester resins.
Latest Patents
His latest patents focus on the formulation of electrostatic image developing toners. One notable invention is a urethane-modified polyester resin that has a total acid value not greater than 10 KOH mg/g. This resin is created by kneading a base polyester resin with specific acid and hydroxyl values, along with a low-molecular-weight polyester resin and a polyisocyanate compound. The precise ratios and molecular weights of these components are critical for achieving the desired properties of the toner. This novel resin serves as a binder for the toner, which is mixed with colorants and other agents before being cooled and pulverized for use.
Career Highlights
Kazuo Hisamatsu has worked with notable companies in the chemical industry, including Mitsui Toatsu Chemicals, Incorporated and Mitsui Chemicals, Inc. His experience in these organizations has allowed him to refine his expertise in polymer chemistry and toner technology.
Collaborations
Hisamatsu has collaborated with esteemed colleagues such as Masaaki Shin and Akira Misawa. These partnerships have contributed to the successful development of his innovative products.
Conclusion
Kazuo Hisamatsu's work in the field of electrostatic image developing toners exemplifies the impact of innovation in materials science. His contributions continue to influence the industry and enhance the performance of toner products.