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:
Apr. 05, 2022
Filed:
Dec. 07, 2015
Borealis Ag, Vienna, AT;
Martina Sandholzer, Linz, AT;
Klaus Bernreitner, Linz, AT;
Hermann Braun, Linz, AT;
Hermann Prokschi, Wartberg ob der Aist, AT;
Ulrich Schreider, Tann, DE;
Frank Schroder, Naunhof OT Albrechtshain, DE;
Thomas Hager, Garching/Hart, DE;
Katja Klimke, Linz, AT;
Markus Gahleitner, Neuhofen/Krems, AT;
Borealis AG, Vienna, AT;
Abstract
The present invention provides a process for extruding and pelletising a propylene copolymer. The copolymer has a content of comonomer from 5 to 40% by mole, a melt flow rate MFRmeasured at 230° C. under a load of 2.16 kg of from 0.5 to 15 g/10 min and a content of cold xylene soluble material of from 20 to 60% by weight. The process comprises extruding the propylene copolymer through a die plate into an underwater pelletiser and cutting strands of the propylene copolymer into pellets in the underwater pelletiser, wherein the ratio of the mass flow rate of the propylene copolymer to the mass flow rate of the cooling water is from 0.020 to 0.060; and the propylene copolymer comprises a polymeric nucleating agent.