Company Filing History:
Years Active: 1995
Title: Michiyo Tanigawa: Innovator in Polycarbonate Technology
Introduction
Michiyo Tanigawa is a prominent inventor based in Hyogo, Japan. She has made significant contributions to the field of polycarbonate technology, holding a total of 2 patents. Her work focuses on developing innovative materials that enhance the properties and applications of polycarbonates.
Latest Patents
One of her latest patents is a (co)polycarbonate composition and process for preparing the same. This composition primarily comprises a (co)polycarbonate with a limiting viscosity number [.eta.] ranging from 0.2 to 1.0 dl/g. It features terminal hydroxyl groups in an amount of 20 mole % or below, ensuring that it is substantially free from any branched structures that could arise from side reactions. Additionally, the (co)polycarbonate contains chlorine in an amount of 10 ppm or below, as well as an alkali metal ion and/or an alkaline earth metal ion in an amount of 1 ppm or below. The preparation process involves a melt transesterification method, utilizing a dihydroxy compound such as bisphenol A and a carbonic diester like diphenyl carbonate, along with a nitrogen-containing basic compound or a catalyst from specific groups of the periodic table.
Career Highlights
Tanigawa is currently employed at Daicel Chemical Industries, Ltd., where she continues to advance her research and development efforts. Her innovative work has positioned her as a key figure in the field of polymer science.
Collaborations
Throughout her career, Michiyo Tanigawa has collaborated with notable colleagues, including Yoshimichi Okano and Yutaka Fukuda. These partnerships have contributed to her success and the advancement of her research.
Conclusion
Michiyo Tanigawa's contributions to polycarbonate technology exemplify her dedication to innovation and excellence in her field. Her patents reflect her commitment to developing advanced materials that meet industry needs.