Company Filing History:
3 out of 278 
3 out of 63 
2 out of 371 
Years Active: 2010-2016
Title: Hisanori Kishida: Innovator in Polylactic Acid Production
Introduction
Hisanori Kishida is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of polylactic acid (PLA). With a total of 3 patents, his work focuses on innovative methods that enhance the efficiency and sustainability of PLA synthesis.
Latest Patents
Kishida's latest patents include a method to produce semi-crystalline polylactides. This invention provides a method for synthesizing semi-crystalline polylactides (PLA) even from a lactide mixture including meso-LA and rac-LA. According to the invention, when a mixture of racemic lactide and meso-lactide is polymerized using a catalyst capable of iso-selectively polymerizing L-lactide and D-lactide, an amorphous poly (meso-lactide) block is formed from meso-lactide. A semi-crystalline poly (racemic lactide) block is formed from racemic lactide by separately polymerizing racemic lactide and meso-lactide, taking advantage of the difference in physicochemical properties between them. This results in a polylactide that is semi-crystalline as a whole.
Another significant patent is a method for producing polylactic acid. This method is capable of producing stereocomplex polylactic acid using carbon-neutral materials that are not competitive with food sources, such as saccharides. The production method includes several steps: reacting glycerin with sodium hydroxide in high-temperature and high-pressure water to produce a racemic sodium lactate aqueous solution, separating sodium from the solution to recover racemic lactic acid, dimerizing the racemic lactic acid to produce a lactide mixture, and polymerizing the racemic lactide with a salen-metal complex as a catalyst to produce stereocomplex polylactic acid.
Career Highlights
Kishida has worked with prominent companies such as Hitachi Zosen Corporation and Tohoku Electric Power Company, Inc. His experience in these organizations has contributed to his expertise in polymer production and innovation.
Collaborations
Throughout his career, Kishida has collaborated with notable colleagues, including Takehiko Moriya and Takashi Hasegawa. These collaborations have likely enriched his