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. 02, 2014
Filed:
Mar. 01, 2010
Christelle Grein, Linz, AT;
Klaus Bernreitner, Linz, AT;
Mari Kylmälä, Puchenau, AT;
Balakantha Rao Kona, Linz, AT;
Elisabeth Potter, Linz, AT;
Christelle Grein, Linz, AT;
Klaus Bernreitner, Linz, AT;
Mari Kylmälä, Puchenau, AT;
Balakantha rao Kona, Linz, AT;
Elisabeth Potter, Linz, AT;
Borealis AG, Vienna, AT;
Abstract
Process for the production of polypropylene random copolymers containing 2.5 to 5.0 wt % of ethylene as comonomer and having an MFRin accordance with ISO 1 133 (230° C., 2.16 kg load) of ≧25 g/10 min to 100 g/10 min and a hexane-solubles content, determined according to FDA CFR 21 §177.1520 below 5 wt %, said process comprising the step of polymerizing propylene and ethylene in the presence of a catalyst system comprising (i) a Ziegler-Natta procatalyst which contains a trans-esterification product of a lower alcohol and a phthalic ester as internal donor and (ii) an organometallic cocatalyst and (iii) an external donor represented by formula (I) or (II) Si(OCHCH)(NRR) (I) or Si(OCH)(CH(cyclohexyl) (II) wherein Rand Rcan be the same or different and represent a hydrocarbon group having 1 to 12 carbon atoms, the polypropylene random copolymers with a low level of odor and taste themselves and their use for injection molding applications, preferably for thin-wall packaging for food packaging in non-cooking applications and for medical packaging.