Toshio Oshiba

Title: Innovations by Toshio Oshiba in Copper Phthalocyanine Production

Introduction

Toshio Oshiba, an accomplished inventor based in Tokyo, Japan, has made significant contributions to the field of chemical engineering, particularly in the production of copper phthalocyanine pigments. With a total of three patents to his name, highly specialized processes developed by Oshiba have enhanced both the efficiency and quality of pigment production.

Latest Patents

Oshiba's most recent patents include groundbreaking methods for producing β type copper phthalocyanine pigment. The first patent outlines a process that involves dry-milling a crude copper phthalocyanine with a purity of 97 to 100%. This is carried out at a temperature range of 180 to 50°C, resulting in an α/β mixed crystal type copper phthalocyanine with a notable α ratio of 5 to 35%. Following this, the dry-milled product is treated with a water-miscible organic solvent for enhanced performance.

The second patent expands on this process, detailing the production of a β type copper phthalocyanine pigment characterized by an average primary crystal diameter of 80±40 nm and specific crystallite dimensions in various planes. This meticulous method not only ensures high purity but also optimizes the physical properties of the pigment, crucial for various applications.

Career Highlights

Oshiba's professional journey includes significant roles in reputable companies such as Toyo Ink Manufacturing Company and Toyo Ink Mfg. Co., Ltd. His dedication to research and development has played a crucial role in advancing the quality of pigments used in inks and coatings.

Collaborations

During his career, Oshiba has collaborated with notable colleagues like Osamu Shiromaru and Takuya Kotani, whose combined expertise has further propelled innovations in pigment technology. These collaborations have facilitated a highly productive research environment, leading to advances that benefit the wider industry.

Conclusion

Toshio Oshiba stands out as a prominent inventor in the specialty chemicals sector, particularly in the production of copper phthalocyanine pigments. With three patents reflecting his innovative processes and collaborations with esteemed colleagues, Oshiba continues to contribute to the evolution of pigment production, setting new standards in the industry.