Toshiyuki Oshima

Introduction

Toshiyuki Oshima, a prominent inventor based in Ibaraki, Japan, has made significant contributions to the field of polyurea resin technology. With a total of four patents to his name, Oshima's work focuses on innovations that enhance the performance and application of polyurethane resin compositions.

Latest Patents

Oshima's latest patents showcase his expertise in developing advanced resin formulations. His first patent describes a polyurethane resin composition designed for reaction injection molding (RIM) or coating use. This innovative composition includes a polyoxyalkylene polyamine, an aromatic polyamine and/or xylylenediamine, and a polyisocyanate compound. Notably, one or both of the components (a) and (b) undergo modification through a Michael reaction with a vinyl monomer featuring an electron attracting group, transforming primary amino groups into secondary amino groups. Additionally, the composition incorporates an internal mold release system containing a polyoxyalkylene glycol mono-C4-C1 alkyl ether and/or a reaction product between a primary aromatic polyamine and a polyglycidyl ether.

In his second notable patent, Oshima details a polyurea resin molding composition intended for RIM applications. This composition consists of a polyoxyalkylenepolyamine with an average molecular weight exceeding 400 and multiple terminal primary or secondary amino groups. The formulation also contains an aromatic polyamine and/or xylylenediamine and a polyisocyanate. A significant aspect of this patent is the incorporation of a polymer prepared through the in situ polymerization of various olefinically unsaturated monomers, formed under the influence of a radical polymerization initiator. The balance of the average amino equivalent of the polyamines in combination with the average NCO equivalent of the polyisocyanate is carefully calibrated, ranging from approximately 1:0.7 to 1:1.5.

Career Highlights

Toshiyuki Oshima has demonstrated his commitment to innovation while working at Nippon Paint Company, Ltd. His role in this esteemed organization has enabled him to develop and patent cutting-edge materials that have applications across various industries, particularly in coatings and construction.

Collaborations

Throughout his career, Oshima has collaborated with talented colleagues, including Hideo Ishibashi and Satoshi Yamamoto. These partnerships have contributed to his innovative approach to resin technology and have helped pave the way for new developments in the field.

Conclusion

Toshiyuki Oshima stands out as a leading inventor in the realm of polyurea resins. His contributions have not only led to significant patents but have also influenced the industry through advancements in resin technology. With his ongoing commitment to research and development, Oshima continues to be a vital asset to Nippon Paint Company, Ltd., and the broader field of material science.