Company Filing History:
2 out of 1,379 
2 out of 1,788 Years Active: 1995-2002
Title: Innovations of Yukio Ishii in Polyolefin Catalysis
Introduction
Yukio Ishii is a prominent inventor based in Osaka, Japan, known for his significant contributions to the field of polyolefin catalysis. With a total of four patents to his name, Ishii has made remarkable advancements that have impacted the chemical industry.
Latest Patents
One of his latest patents involves a metallocene compound and a process for preparing polyolefin using it. This invention describes an olefin polymerization catalyst system that comprises an organic transition metal compound and a support. The organic transition metal compound is soluble in an inert organic solvent, while the support is insoluble in the same solvent. The support consists of an organic high molecular weight compound containing a specific carbonyl-containing group. This catalyst system is capable of polymerizing olefins with high activity, producing polymers with high stereoregularity. It effectively prevents adhesion or fouling of the polymer generated during polymerization or an organic aluminum oxy compound on the reactor's inner wall. Additionally, it leads to a high bulk density of the polymer and significantly reduces the level of fisheye and/or gel generation in the processed item. The system maintains high productivity and manufactures high-quality products, thus providing an extremely high contribution to the industry.
Career Highlights
Throughout his career, Yukio Ishii has worked with notable companies such as Mitsui Toatsu Chemicals, Incorporated and Mitsui Chemicals, Inc. His work in these organizations has allowed him to develop innovative solutions that enhance the efficiency and quality of polymer production.
Collaborations
Ishii has collaborated with esteemed colleagues, including Takeo Inoue and Shigeru Kimura. These partnerships have fostered a creative environment that has led to groundbreaking advancements in the field of catalysis.
Conclusion
Yukio Ishii's contributions to polyolefin catalysis through his innovative patents and collaborations have significantly advanced the chemical industry. His work continues to influence the development of high-quality polymer products.