Multifunctional lithium containing initiator

US4201729A · kind A · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• Lu H. Tung · Midland, US
• Grace Y. Lo · Midland, US
• Joseph W. Rakshys · Midland, US
• Douglas E. Beyer · Midland, US

Key dates

• Filing date: Aug 7, 1978
• Grant date: May 6, 1980
• Expiry date: Aug 7, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F36/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Highly desirable multifunctional lithium containing initiators are prepared by reacting a compound such as an organo lithium with an organic compound containing at least two 1,1-diphenylethylene groups. Such initiators can be prepared in the absence of polar solvents and are very desirable for the polymerization of dienes such as butadiene to a desirable 1,4 configuration. Several di-lithium compounds have been employed to initiate polymerization of various unsaturated organic monomers.