Processes for the removal of rubber from non-hevea plants

US11396560B2 · kind B2 · utility

Assignee

• BRIDGESTONE CORPORATION · JP

Inventors

• Yingyi Huang · Sagamore Hills, US
• Mark W. Smale · Hudson, US
• Robert W. White · Gilbert, US
• Hiroshi Mouri · Tokyo, JP
• William M. Cole · Norton, US
• Michael R. Hartzell · Youngberg, US
• Taigyoo Park · Mesa, US

Key dates

• Filing date: Apr 17, 2020
• Grant date: Jul 26, 2022
• Expiry date: Apr 17, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/03
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Provided herein are organic solvent-based processes for the removal of rubber from non-Hevea plants such as guayule shrubs. By the use of the processes, solid purified rubber can be obtained that contains 0.05-0.5 weight % dirt, 0.2-1.5 weight % ash, and 0.1-4 weight % resin (when it has been dried so as to contain 0.8 weight % volatile matter).