Enhanced aging and reduced shrinkback polymeric composition

US12421378B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Stacey A. Saba · Midland, US
• Mohamed Esseghir · Lawrenceville, US
• Theo Geussens · Samstagern, CH
• Yushan Hu · Pearland, US
• Brayden E. Glad · Lake Jackson, US
• Andrew T. Heitsch · Angleton, US
• Buu-Dang Nguyen · Gilbertsville, US

Key dates

• Filing date: Oct 4, 2021
• Grant date: Sep 23, 2025
• Expiry date: Nov 1, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2207/062
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polymeric composition includes (i) a copolymer of ethylene and an alpha olefin comonomer, the copolymer having a density of 0.945 g/cc to 0.960 g/cc, (ii) an ethylene-based polymer, and (iii) polyethylene glycol. The combination of (i) and (ii) has a High Mw Comonomer Content of 3.2 wt % or greater based on a total weight of the combined (i) and (ii) over the weight average molecular weight range of 105 g/mol to 105.5 g/mol as measured by GPC, wherein 15 wt % or greater of the total weight of the polymeric composition is the combined (i) and (ii) having a molecular weight in the range of 105 g/mol to 105.5 g/mol as measured by GPC, wherein the polymeric composition has a Relevant Comonomer Content of 0.6 wt % or greater and wherein the polymeric composition has a density of 0.945 g/cc or greater as measured according to ASTM D792.