Location History:
- Iwaki, JA (1976 - 1977)
- All of Iwaki, JP (1988)
- Fukushima, JP (1987 - 1989)
- Iwaki, JP (1980 - 1993)
Company Filing History:
30 out of 776 
12 out of 137 
1 out of 381 
Years Active: 1976-1993
Title: The Innovative Journey of Yo Iizuka
Introduction
Yo Iizuka is a prolific inventor based in Iwaki, Japan, with a remarkable portfolio of 43 patents to his name. His groundbreaking work primarily focuses on the development of advanced materials and processes, particularly related to polyarylene sulfide, which is widely utilized in various high-performance applications.
Latest Patents
One of Iizuka's latest patents showcases a novel process for the preparation of cross-linked polyarylene sulfide. This innovative process involves a systematic approach that produces granular polyarylene sulfide with a high melt viscosity and an exceptional degree of cross-linkage. The invention outlines three key steps:
1. An initial-stage polymerization step wherein an alkali metal sulfide, a dihaloaromatic compound, and a polyhaloaromatic compound are reacted in the presence of water at controlled temperatures to achieve significant conversion ratios and specific melt viscosity parameters.
2. A temperature raising step to enhance the quality of the polymer, where precise adjustments of water and temperature conditions are made to reach desired viscosity metrics.
3. A second-stage polymerization step that further refines the product’s properties by continuing the reaction at elevated temperatures until the melt viscosity meets exacting standards.
Career Highlights
Throughout his career, Yo Iizuka has made significant contributions to the field of polymer chemistry. He has held positions in esteemed organizations such as Kureha Kagaku Kogyo Kabushiki Kaisha and Kureha Kagaku Kogyo K.K., where his innovative solutions have advanced the production and application of polyarylene sulfide materials.
Collaborations
Iizuka has collaborated with notable colleagues such as Takayuki Katto and Zenya Shiiki, enhancing the research and development efforts within his field. These collaborations have enriched his work, allowing for a broader exchange of ideas and advancements in technology.
Conclusion
Yo Iizuka's dedication to innovation in the field of polymer chemistry is reflected in his extensive patent portfolio and collaborative work. His latest inventions not only exemplify his expertise but also contribute to the evolution of materials science, enhancing the performance and utility of polyarylene sulfide in various applications.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.