Organo-dilithium compound and process for preparing the same

US7550537B2 · kind B2 · utility

Assignee

• KRATON POLYMERS LLC · US

Inventors

• Carl L. Willis · Houston, US
• Daniel E. Goodwin · Katy, US
• Grant Wesley Haddix · Katy, US
• Pierre N. Tutunjian · Houston, US
• Joy P. Cocchiara · Houston, US
• Harvey E. Atwood · Kingwood, US
• Craig A. Stevens · Houston, US

Key dates

• Filing date: Oct 22, 2007
• Grant date: Jun 23, 2009
• Expiry date: Oct 22, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F1/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is an anionic diinitiator prepared using a diisopropenyl benzene compound and an organo lithium compound having primary polymerization sites. The anionic diinitiators are prepared by admixing a diisopropenyl benzene compound with diethyl ether, ethylene, an organo lithium compound, and a solvent under reaction conditions sufficient to prepare a diinitiator having primary lithium alkyl reactive sites. The diinitiators are particularly useful in preparing block copolymers.