Location History:
- Niigata-ken, JP (2016)
- Joetsu, JP (2018 - 2022)
- Niigata, JP (2021 - 2024)
Company Filing History:
11 out of 5,966 
1 out of 42 Years Active: 2016-2024
Title: Junichi Matsubara: Innovator in Hydroxypropyl Methyl Cellulose Technologies
Introduction
Junichi Matsubara is a prominent inventor based in Joetsu, Japan. He has made significant contributions to the field of chemical engineering, particularly in the development of hydroxypropyl methyl cellulose derivatives. With a total of 12 patents to his name, Matsubara's work has advanced the applications of cellulose in various industries.
Latest Patents
Matsubara's latest patents include innovative methods for producing hydroxypropyl methyl cellulose phthalate (HPMCP) and hydroxypropyl methyl cellulose acetate succinate (HPMCAS). The method for HPMCP involves an esterification step where hydroxypropyl methyl cellulose reacts with a carboxybenzoylating agent in the presence of an aliphatic carboxylic acid. This process takes place in a kneader reactor equipped with multiple stirring blades. The resulting product solution is then precipitated and washed to recover HPMCP, which exhibits a yellowness of 10.0 or less at 20° C. in a 10% by mass solution in acetone. Similarly, the method for HPMCAS also includes an esterification step, followed by precipitation and recovery, yielding a product with a yellowness of 15.0 or less in a 2% by mass solution in a mixed solvent.
Career Highlights
Throughout his career, Matsubara has worked with notable companies such as Shin-Etsu Chemical Co., Ltd. His expertise in cellulose chemistry has positioned him as a key figure in the development of new materials and processes that enhance product performance.
Collaborations
Matsubara has collaborated with talented individuals in his field, including Mitsuhiro Yoshida and Kazuki Kikuchi. These partnerships have fostered innovation and contributed to the successful development of his patented technologies.
Conclusion
Junichi Matsubara's contributions to the field of hydroxypropyl methyl cellulose technologies highlight his role as a leading inventor. His innovative methods and collaborations continue to influence advancements in chemical engineering.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.