Processes for the removal of rubber from non-hevea plants

US9315589B2 · 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

Key dates

• Filing date: Mar 6, 2013
• Grant date: Apr 19, 2016
• Expiry date: Mar 6, 2033

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).