Company Filing History:
Years Active: 2018-2022
Title: The Innovations of Ryutaro Nakagawa
Introduction
Ryutaro Nakagawa is a prominent inventor based in Hiratsuka, Japan. He has made significant contributions to the field of rubber compositions, particularly in the development of materials used in tire manufacturing. With a total of 3 patents to his name, Nakagawa's work has had a notable impact on the automotive industry.
Latest Patents
One of Nakagawa's latest patents is a rubber composition for a tire tread and pneumatic tire using the same. This innovative rubber composition includes a diene rubber, silica, and a cured product. The formulation specifies that the silica content ranges from 20 to 100 parts by mass per 100 parts by mass of the diene rubber, while the cured product content is between 0.3 to 30 parts by mass per 100 parts by mass of the diene rubber. The diene rubber consists of natural rubber and a modified butadiene rubber with a polyorganosiloxane group at the terminal. The natural rubber content is between 30 to 90 mass %, and the modified butadiene rubber content is from 10 to 70 mass %. The cured product is obtained by curing a crosslinkable oligomer or polymer that is incompatible with the diene rubber, achieving a JIS A hardness of 3 to 45.
Another significant patent by Nakagawa is for a rubber composition for sidewalls and a pneumatic tire using the same. This technology provides a rubber composition that contains a diene rubber, 10 to 120 parts by mass of carbon black, and 3 to 30 parts by mass of an acid-modified polyolefin with a melting point of 100 to 150°C per 100 parts by mass of the diene rubber. The main chain of the acid-modified polyolefin is a homopolymer of an olefin, which enhances the performance of the tire sidewalls.
Career Highlights
Ryutaro Nakagawa is currently employed at The Yokohama Rubber Co., Ltd., where he continues to innovate and develop new rubber technologies. His work has been instrumental in advancing the quality and performance of tires, contributing to safer and more efficient vehicles on the road.
Collaborations
Throughout his career, Nakagawa has collaborated with talented individuals such as Yusuke Tanabe and Hiroki Sugi