This inventor holds 5 USPTO granted patents. Top assignees: Bridgestone Tire Company Limited, Japan Synthetic Rubber Co., Ltd.. Active years: 1976-1978.
Company Filing History:
5 out of 504 
1 out of 377 
Years Active: 1976-1978
Title: Yutaka Iseda: Innovator in Polyurethane Technology
Introduction
Yutaka Iseda is a notable inventor based in Tachikawa, Japan. He has made significant contributions to the field of polyurethane technology, holding a total of 5 patents. His work focuses on developing advanced polyurethane compositions that enhance performance characteristics.
Latest Patents
One of Iseda's latest patents involves a polyurethane composition produced by mixing specific components. This composition includes 100 parts by weight of a prepolymer with terminal isocyanate groups and a number average molecular weight ranging from 800 to 20,000. Additionally, it incorporates 5 to 30 parts by weight of a radical polymerizable vinyl compound and 0.05 to 1.0 part by weight of a radical initiator. A curative selected from polyamine and polyol is added, and the mixture is cured by heating at temperatures between 70 to 140 degrees Celsius. The equivalent ratio of the active hydrogen of the curative to the isocyanate groups is maintained between 0.8 to 1.2. Another significant patent focuses on a polyurethane composition that boasts improved tear strength. This is achieved by mixing 20 to 50 parts by weight of finely divided acidic silica particles with 100 parts by weight of isocyanate-terminated prepolymer and appropriate amounts of curative. The mixture is cured in a well-known manner, ensuring that the ratio of average chain distance between crosslinking points to the average size of silica particles is between 2.5 to 20.
Career Highlights
Throughout his career, Yutaka Iseda has worked with prominent companies in the industry. He has been associated with Bridgestone Tire Company Limited and Japan Synthetic Rubber Co., Ltd. These experiences have allowed him to apply his innovative ideas in practical settings, contributing to advancements in material science.
Collaborations
Iseda has collaborated with notable colleagues, including Yoji Watabe and Michio Ishii. Their combined expertise has likely fostered a creative environment that encourages innovation and the development of new technologies.
Conclusion
Yutaka Iseda's contributions to polyurethane technology exemplify the impact of innovative thinking in material science. His patents reflect a commitment to enhancing the performance of polyurethane compositions, making significant strides in the industry.