Low density polyethylene with high elongation hardening

US10364306B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Sebastian Weiand · Cologne, DE
• Andrei Gonioukh · Liblar, DE
• Stephan Schmitz · Neunburg vorm Wald, DE
• Andre-Armand Finette · Cologne, DE
• Guido Bürger · Münstermaifeld, DE
• Guido Küpper · Mechernich, DE
• Thomas Herrmann · Cologne, DE
• Iakovos Vittorias · Mainz, DE
• Dieter Lilge · Schifferstadt, DE
• Gerd Mannebach · Münstermaifeld, DE

Key dates

• Filing date: Sep 9, 2015
• Grant date: Jul 30, 2019
• Expiry date: Sep 9, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2500/08
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present disclosure provides a low density polyethylene (LDPE) having (A) a density from 0.910 to 0.924 g/cm3, determined according to ISO 1183 at 23° C.; (B) an elongational hardening of at least 4.2, at 150° C. at an elongational rate of 1 s−1; (C) a ratio Mw/Mn of at least 18, where (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and (ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and (D) a Mw of at least 230,000 g/mol. The present disclosure also provides an article of manufacture made from or containing (A) a substrate and (B) a coating layer made from or containing the disclosed LDPE. The present disclosure further provides a polymerization process occurring (A) in the presence of oxygen as the only radical initiating agent and (B) in the absence of solvents.