Company Filing History:
Years Active: 1981-1994
Title: Toshiro Shimada: Innovator in Polymerization Technology
Introduction
Toshiro Shimada is a notable inventor based in Ube, Japan. He has made significant contributions to the field of polymerization, particularly in the development of methods for laurolactam. With a total of 4 patents to his name, Shimada's work has had a lasting impact on the industry.
Latest Patents
Shimada's latest patents include a continuous polymerization method of laurolactam and an apparatus for the same. This innovative method consists of three stages. The prepolymerization process involves preliminarily heating laurolactam with 1 to 10% weight of water added. The laurolactam is then continuously fed and passed from the upper part to the lower part of the longitudinal-type polymerization reaction zone. A temperature decreasing gradient of 10°C or more is arranged from the upper part to the lower part at a polymerization temperature of 250°C to 300°C. The polymerization occurs under vapor pressure, achieving a conversion rate of 99.5% or more. The intermediate process includes releasing pressure from the prepolymerization product for conversion into an intermediate product at atmospheric pressure. The post polymerization process involves continuously feeding the intermediate product at atmospheric pressure and polymerizing it with agitation and air discharge in the presence of inert gas under reduced pressure or atmospheric pressure to achieve a final relative viscosity of 1.9 to 3.3.
Another significant patent is the continuous hydrolytic polymerization of laurolactam, which follows a similar three-stage process as described above. This method also emphasizes the importance of temperature control and pressure management to optimize the polymerization process.
Career Highlights
Throughout his career, Toshiro Shimada has worked with prominent companies such as Ube Industries, Inc. and Vbe Industries, Ltd. His expertise in polymerization technology has been instrumental in advancing the capabilities of these organizations.
Collaborations
Shimada has collaborated with notable coworkers, including Tatsuo Tsumiyama and Atsuo Kawakami. Their combined efforts have contributed to the successful development of innovative polymerization methods.
Conclusion
Toshiro Shimada's contributions to polymerization technology, particularly in the continuous polymerization of laurolactam, showcase his innovative spirit and dedication to advancing