Company Filing History:
1 out of 16 
1 out of 305 
1 out of 105 Years Active: 1992
Title: Tsuneo Ohkawara: Innovator in Colorant Technology
Introduction
Tsuneo Ohkawara is a notable inventor based in Sakai, Japan. He has made significant contributions to the field of colorants, particularly in the mass-coloring of polyester fibers. His innovative approach has led to advancements that enhance the quality and stability of colored polyester products.
Latest Patents
Ohkawara holds a patent for a heat-resistant colorant designed for mass-coloring polyester, specifically polyethylene terephthalate. This patent, which includes 1 patent, describes a colorant that contains 100 parts of pigments and/or dyes combined with a liquid aliphatic polyester dispersing medium. The dispersing medium is characterized by a viscosity not exceeding 150 poises at 25 degrees Celsius and a hydroxyl value not exceeding 25 mgKOH/g. The unique formulation allows for easy blending and uniform dispersion in fiber-grade polyester, ensuring that the fibers maintain excellent stability during manufacturing and uniform quality.
Career Highlights
Throughout his career, Tsuneo Ohkawara has worked with prominent companies such as Nippon Ester Co., Ltd. and Kanebo, Limited. His experience in these organizations has contributed to his expertise in colorant technology and polyester applications.
Collaborations
Ohkawara has collaborated with notable coworkers, including Shosuke Oku and Noboru Watanabe. Their combined efforts have furthered advancements in the field of colorants and polyester fibers.
Conclusion
Tsuneo Ohkawara's innovative work in colorant technology has significantly impacted the polyester industry. His patent for a heat-resistant colorant exemplifies his commitment to enhancing product quality and stability.