Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation

US7858706B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Daniel J. Arriola · Midland, US
• Edmund M. Carnahan · Fresno, US
• Yunwa W. Cheung · Fryeburg, US
• David D. Devore · Midland, US
• David D. Graf · Midland, US
• Phillip D. Hustad · Manvel, US
• Roger L. Kuhlman · Lake Jackson, US
• Colin Li Pi Shan · Pearland, US
• Benjamin C. Poon · Pearland, US
• Gordon R. Roof · Midland, US
• James C. Stevens · Richmond, US
• Pamela J. Stirn · Midland, US
• Timothy T. Wenzel · Charleston, US

Key dates

• Filing date: Mar 17, 2005
• Grant date: Dec 28, 2010
• Expiry date: Mar 27, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31587
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.