Location History:
- Kyoto, JP (1989 - 1990)
- Kusatsu, JP (1993)
Company Filing History:
2 out of 252 
1 out of 1 
1 out of 3,476 
Years Active: 1989-1993
Title: Toshiaki Doyama: Innovator in Polymer Chemistry
Introduction
Toshiaki Doyama is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of polymer chemistry, particularly through his innovative patents. With a total of 3 patents, Doyama has focused on developing materials that enhance the performance of synthetic fibers and thermoplastic resins.
Latest Patents
Doyama's latest patents include a linear random N-substituted acrylamide copolymer. This copolymer comprises 65 to 99% by mole of ethylene units, 1 to 15% by mole of acrylate units, and 1 to 35% by mole of acrylamide units. It has a weight average molecular weight ranging from 1000 to 50000. The copolymer exhibits excellent antistatic ability for thermoplastic resins without compromising physical properties such as transparency and elongation. Additionally, it demonstrates superior anti-blocking ability, making it suitable for various applications.
Another significant patent involves a method of imparting flame resistance to polyester fiber substrates. This invention utilizes a flame retardant composed of 75 to 95 weight parts of a hexabromocyclododecane compound with a melting point of at least 195°C, and 25 to 5 weight parts of a hexabromocyclododecane compound with a melting point below 160°C. This flame retardant not only provides excellent flame resistance but also minimizes soiling during the dyeing process of synthetic fiber substrates.
Career Highlights
Throughout his career, Doyama has worked with prominent companies such as Dai-ichi Kogyo Seiyaku Co., Ltd. and Kai-ichi Kogyo Seiyaku Co., Ltd. His work in these organizations has allowed him to develop and refine his innovative ideas in polymer chemistry.
Collaborations
Doyama has collaborated with notable coworkers, including Akio Watanabe and Hideyuki Sumi. Their combined expertise has contributed to the advancement of their projects and innovations.
Conclusion
Toshiaki Doyama's contributions to polymer chemistry through his patents demonstrate his commitment to innovation and excellence. His work continues to impact the industry positively, showcasing the importance of research and development in creating advanced materials.