Haruo Ueno

Title: Haruo Ueno: Innovator in Polymer Chemistry

Introduction

Haruo Ueno is a prominent inventor based in Chiba, Japan, known for his significant contributions to the field of polymer chemistry. With a total of 11 patents to his name, Ueno has made remarkable advancements in the polymerization processes of 1,3-butadiene.

Latest Patents

Ueno's latest patents include a groundbreaking process for polymerizing 1,3-butadiene. This process involves bringing into contact a 1,2-polymerization catalyst, which consists of a soluble cobalt compound, an organic aluminum halide, an organic lithium compound, and carbon disulfide or phenyl isothiocyanate with 1,3-butadiene in a polymerization medium. This innovative method is particularly advantageous for preparing 1,2-polybutadiene, which boasts a content of syndiotactic 1,2-structural units of not less than 90%, a melting point ranging from 200°C to 220°C, and an intrinsic viscosity of 1.2 to 7. Another notable patent is a method for producing polybutadiene with enhanced mechanical strength. This polybutadiene consists of 5% to 30% by weight of a boiling n-hexane-insoluble fraction and 70% to 95% by weight of a boiling n-hexane-soluble fraction. It is prepared by polymerizing 1,3-butadiene in a polymerization solvent using a specific catalyst.

Career Highlights

Haruo Ueno is currently associated with Ube Industries, Inc., where he continues to innovate in the field of polymer chemistry. His work has significantly impacted the industry, particularly in the development of high-performance materials.

Collaborations

Ueno has collaborated with notable coworkers, including Takefumi Yano and Michimasa Shimizu, contributing to various projects that enhance the understanding and application of polymerization techniques.

Conclusion

Haruo Ueno's contributions to polymer chemistry through his innovative patents and collaborations have established him as a key figure in the field. His work continues to influence advancements in polymer materials and processes.