Butene/α-olefin block interpolymers

US8293859B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Gary R. Marchand · Lake Jackson, US
• Yunwa W. Cheung · Fryeburg, US
• Benjamin C. Poon · Pearland, US
• Jeffrey D. Weinhold · Lake Jackson, US
• Kim L. Walton · Lake Jackson, US
• Pankaj Gupta · Lake Jackson, US
• Colin Li Pi Shan · Pearland, US
• Phillip D. Hustad · Manvel, US
• Roger L. Kuhlman · Lake Jackson, US
• Edmund M. Carnahan · Fresno, US
• Eddy I. Garcia-Meitin · Angleton, US
• Patricia L. Roberts · Pearland, US

Key dates

• Filing date: Jan 30, 2009
• Grant date: Oct 23, 2012
• Expiry date: May 10, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F297/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Embodiments of the invention provide a class of butene/α-olefin block interpolymers. The butene/α-olefin inter-polymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block butene/α-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (‘TREF’), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the butene/α-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.4.