Masami Shirao

Title: Masami Shirao: Innovator in Pigment Production

Introduction

Masami Shirao is a notable inventor based in Tokyo, Japan, recognized for his contributions to the field of pigment production. With a total of six patents to his name, Shirao has made significant advancements in the methods of producing disazo pigments and aluminum phthalocyanine compositions.

Latest Patents

One of Shirao's latest patents is a method of producing disazo pigment. This innovative method involves a coupling reaction in an acidic aqueous solution, where a tetrazo aqueous solution containing a tetrazo component of benzidines is combined with a coupler aqueous solution. The resulting disazo pigments exhibit excellent transparency, flowability, and dispersibility, making them highly effective for ink production. Another significant patent is the process for the production of aluminum phthalocyanine composition. This process allows for high yield and purity by bringing molten salts of aluminum chloride and/or aluminum bromide into contact with a phthalocyanine compound, facilitating the substitution of aluminum for the central element.

Career Highlights

Shirao has worked with prominent companies in the industry, including Toyo Ink Manufacturing Company and Toyo Ink Mfg. Co., Ltd. His work has contributed to the development of high-quality pigments that are essential in various applications.

Collaborations

Throughout his career, Shirao has collaborated with notable colleagues, including Junichi Tsuchida and Michichika Hikosaka. These collaborations have further enhanced his innovative approaches in pigment production.

Conclusion

Masami Shirao's contributions to pigment production through his innovative patents have significantly impacted the industry. His work continues to influence the development of high-quality pigments used in various applications.