Koji Baba

Title: Koji Baba: Innovator in Photosensitive Coloring Composition

Introduction

Koji Baba is a notable inventor based in Toyonaka, Japan. He has made significant contributions to the field of photosensitive materials, holding a total of 3 patents. His work focuses on enhancing the quality and stability of photosensitive compositions used in various applications.

Latest Patents

One of Koji Baba's latest patents is a photosensitive coloring composition that includes C.I. pigment yellow 150. This composition yields an extract in an amount of 1% by weight or less when subjected to extraction with tetrahydrofuran. The formulation also includes other pigments, a solvent, a (meth)acrylic resin, a polyfunctional monomer, and a photopolymerization initiator. This innovative composition exhibits excellent fluidity, anti-agglomeration properties, and high coloring power. It allows for the formation of images with superior sharpness when developed with an aqueous alkaline solution. Additionally, it leads to the production of color filters with high uniformity and low surface coarseness, as well as reliable liquid crystal display panels.

Another significant patent by Koji Baba is a method for preserving photosensitive compositions. This method involves placing the photosensitive composition, which contains a photopolymerization initiator and a photopolymerizable monomer and/or oligomer, in a light-shielding vessel. The preservation method ensures that the product of the void ratio (%) in the vessel and the oxygen partial pressure (hPa) in the void part is 1500 (%·hPa) or more, significantly improving preservation stability.

Career Highlights

Koji Baba is currently employed at Sumitomo Chemical Company, Limited, where he continues to innovate in the field of photosensitive materials. His work has been instrumental in advancing technologies related to liquid crystal displays and color filters.

Collaborations

Throughout his career, Koji Baba has collaborated with esteemed colleagues such as Shigeo Hozumi and Toshiya Inoue. These collaborations have further enriched his research and development efforts.

Conclusion

Koji Baba's contributions to the field of photosensitive coloring compositions demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of material science and its applications in modern technology.