Company Filing History:
Years Active: 1997-2000
Title: Innovations of Yasumasa Suda in Metal Phthalocyanine Production
Introduction
Yasumasa Suda is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of chemical engineering, particularly in the production of metal phthalocyanines. With a total of 3 patents to his name, Suda's work has advanced the efficiency and safety of pigment production processes.
Latest Patents
One of Suda's latest patents is a process for the production of metal phthalocyanine. This innovative method excels in color-related properties such as tinting strength, clearness, and hue. Importantly, it avoids harmful reactions between raw materials and solvents, ensuring that no toxic substances like polychlorinated biphenyl (PCB) are formed. The process involves heating phthalic anhydride or phthalimide, urea, metal salt, and a catalyst in mixed solvents of chlorinated benzene and a linear hydrocarbon.
Another notable patent is for the production of copper phthalocyanine. This process addresses the shortcomings of previous methods that required two reaction steps, which often resulted in low yields and purity due to phthalimide adhering to reactor walls. Suda's method allows for the industrially stable production of highly pure copper phthalocyanine at high yields. The process includes reacting phthalic anhydride with ammonia to form phthalimide, followed by the addition of urea and copper compounds to create the desired pigment.
Career Highlights
Yasumasa Suda is currently employed at Toyo Ink Manufacturing Company, where he continues to innovate in the field of chemical production. His expertise in metal phthalocyanine processes has positioned him as a key figure in the industry.
Collaborations
Suda has collaborated with notable coworkers, including Atsushi Endo and Toshio Enokida. Their combined efforts have contributed to advancements in pigment production technologies.
Conclusion
Yasumasa Suda's contributions to the production of metal phthalocyanines reflect his commitment to innovation and safety in chemical engineering. His patents not only enhance the quality of pigments but also prioritize environmental and human health.