Kiyoshi Matsubara

Title: Kiyoshi Matsubara: Innovator in Flexible Urethane Foams

Introduction

Kiyoshi Matsubara is a notable inventor based in Yokohama, Japan. He is recognized for his contributions to the field of flexible urethane foams, particularly through his innovative patent. His work has had a significant impact on the manufacturing processes of these materials.

Latest Patents

Matsubara holds a patent for a "Process for manufacturing high-resilient flexible urethane foams." This process is characterized by the reaction and foaming of polyalkylene ether polyol and an organic polyisocyanate in the presence of a blowing agent, surfactant, and catalyst. The polyalkylene ether polyol used contains 2 to 10% by weight of a vinyl type polymer, with a hydroxyl number ranging from 25 to 60 mg KOH/g. Notably, 20 to 70 mol% of its hydroxyl groups are primary hydroxyl groups, while the remaining are secondary hydroxyl groups. The organic polyisocyanate is a mixture of tolylene diisocyanate with diphenylmethane diisocyanate or a crude diphenylmethane diisocyanate. The surfactant used is a mixture of a high-molecular-weight siloxane-oxyalkylene copolymer with a low-molecular-weight siloxane-oxyalkylene copolymer. Matsubara's innovative approach has led to advancements in the production of high-resilient flexible urethane foams.

Career Highlights

Throughout his career, Matsubara has worked with prominent companies, including Mitsui-Nisso Corporation and Nippon Unicar Company Limited. His experience in these organizations has contributed to his expertise in the field of materials science and manufacturing processes.

Collaborations

Matsubara has collaborated with notable colleagues such as Yuichi Nomura and Tadashi Yatomi. These partnerships have fostered innovation and development in the area of flexible urethane foams.

Conclusion

Kiyoshi Matsubara's contributions to the field of flexible urethane foams through his innovative patent and collaborations with industry professionals highlight his significance as an inventor. His work continues to influence the manufacturing processes of these materials, showcasing the importance of innovation in material science.