Enhanced ESCR of HDPE resins

US7943700B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Donna J. Crowther · Baytown, US
• Stanley J. Katzen · Cincinnati, US
• Zerong Lin · Kingwood, US
• Arnold Lustiger · Edison, US
• Jeanne Marie MacDonald · Sugar Land, US
• Thomas T. Sun · Clinton, US

Key dates

• Filing date: Jun 1, 2006
• Grant date: May 17, 2011
• Expiry date: Apr 21, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2314/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed are polyethylene (“PE”) compositions, articles comprising PE compositions, and methods of making blended PE compositions, wherein the blended composition comprises from about 80 to about 95 weight % of a first PE and from about 5 to about 20 weight % of a second PE. The first PE has a density greater than or equal to about 0.945 g/cc and a MWD greater than about 5. The second PE has a density less than about 0.945 g/cc, a melt index less than about 0.70 g/10 minutes and less than or equal to the melt index of the first PE, a MWD ranging from about 1 to about 5, a weight average molecular weight less than about 400,000, and a CDBI greater than about 50%. The PE composition has an ESCR greater than the ESCR of the first PE.