Mitsuyoshi Shirai

Title: **Mitsuyoshi Shirai: A Pioneer in Composite Films**

Introduction

Mitsuyoshi Shirai is an accomplished inventor based in Ibaraki, Japan, known for his significant contributions to the field of composite films. With a total of 16 patents to his name, Shirai's work primarily focuses on developing innovative materials with enhanced properties that serve various industrial applications.

Latest Patents

One of Shirai's latest patents involves a composite film designed to provide light-curing properties and weather resistance. This composite film incorporates at least a urethane polymer, ensuring that both the initial b* value and the b* value after an accelerated weathering test for 120 hours are 4.0 or less. Additionally, the non-volatile component measured after heating the composite film at 130°C for two hours is 96% or more.

Another notable patent showcases a composite film that offers low-temperature flexibility. This invention features a combination of an acrylic polymer and a urethane polymer. The acrylic polymer contains an acrylic acid-based monomer along with a monofunctional acrylic monomer, whose homopolymer has a glass transition temperature (Tg) of 273 K or more. The specifications of this composite film include a content of acrylic acid-based monomer ranging from 0.5 to 15 wt %. The glass transition temperatures for the acrylic polymer and urethane polymer are also carefully defined to achieve desired flexibility characteristics.

Career Highlights

Throughout his career, Mitsuyoshi Shirai has worked with prominent companies such as Nitto Denko Corporation and Kansai Paint Company, Ltd. His expertise in material science and innovative thinking has significantly influenced the development of advanced composite materials in these organizations.

Collaborations

Shirai has collaborated with notable colleagues such as Komaharu Matsui and Takeshi Eda, who have played vital roles in supporting and enhancing his research and development efforts. Their combined expertise has contributed to the success and practical applications of Shirai's patented technologies.

Conclusion

Mitsuyoshi Shirai's inventive spirit and commitment to advancing composite materials highlight his importance as an innovator in the field. His 16 patents reflect a dedication to solving complex problems within materials science, particularly in creating films with superior properties. As industries continue to seek new materials that offer performance and sustainability, Shirai's contributions will likely play a crucial role in future advancements.