Polyethylene formulations for large part blow molding applications

US11685798B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Peter S. Martin · Houston, US
• Yijian Lin · Manvel, US
• Angela I. Padilla-Acevedo · Lake Jackson, US
• Roger L. Kuhlman · Lake Jackson, US
• Shadid Askar · Houston, US
• Mridula Kapur · Lake Jackson, US
• Todd A. Hogan · Sanford, US
• Joel D. Wieliczko · South Charleston, US
• Chuan C. He · Dunbar, US

Key dates

• Filing date: Jul 18, 2019
• Grant date: Jun 27, 2023
• Expiry date: Jul 27, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2500/19
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In various embodiments, a polyethylene formulation has a density of greater than 0.940 g/cm3 when measured according to ASTM D792, and a high load melt index (I21) of 1.0 g/10 min to 10.0 g/10 min when measured according to ASTM D1238 at 190° C. and a 21.6 kg load. Moreover, the polyethylene formulation has a peak molecular weight (Mp(GPC)) of less than 50,000 g/mol, a number average molecular weight (Mn(GPC)) of less than 30,000 g/mol, and a weight fraction (w1) of molecular weight (MW) less than 10,000 g/mol of less than or equal to 10.5 wt %, as determined by Gel Permeation Chromatography (GPC). Articles made from the polyethylene formulation, such as articles made by blow molding processes are also provided.