The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2023
Filed:
May. 07, 2019
Borealis Ag, Vienna, AT;
Markus Gahleitner, Linz, AT;
Jingbo Wang, Linz, AT;
Klaus Bernreitner, Linz, AT;
Pauli Leskinen, Porvoo, FI;
Johanna Lilja, Porvoo, FI;
BOREALIS AG, Vienna, AT;
Abstract
The present invention is directed to a heterophasic polypropylene composition with improved sterilization resistance and optical properties for blow molding applications, in particular for use in the blow-fill-seal process for preparing bottles. The present invention is further directed to a process for producing such a polypropylene composition using a single-site catalyst and to a container produced from such a polypropylene composition by blow molding, like a bottle, in particular a blow-fill-seal bottle, with improved haze before and after sterilization. The polypropylene composition comprises a blend of a propylene copolymer comprising 2.5 to 12.0 wt % of 1-hexene as a comonomer, and having a melt flow rate MFRof 0.5 to 20.0 g/10 min, and an ethylene homo- or copolymer having a melt flow rate MFRof 0.05 to 30.0 g/10 min and a density of 850 to 940 kg/m, wherein the xylene cold solubles (XCS) content of the polypropylene composition is from 5.0 to 30.0 wt %.