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:
Feb. 09, 2016
Filed:
Dec. 18, 2008
Christelle Grein, Linz, AT;
Klaus Bernreitner, Linz, AT;
Torvald Vestberg, Porvoo, FI;
Borealis AG, Vienna, AU;
Abstract
High purity heterophasic polypropylene copolymers comprising (A) 73 to 98 wt % of a propylene homo- or copolymer matrix with an MFRin accordance with ISO 1133 (230° C., 2.16 kg load) of ≧45 g/10 min and (B) 2 to 27 wt % of an elastomeric copolymer, comprising propylene in an amount of at least 50 wt % of component (B) and at least ethylene and/or one other Cto Calpha olefin in an amount of up to 50 wt % of component (B), the heterophasic polypropylene copolymers being obtainable by a multistage polymerization process 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 and (ii) optionally an organometallic cocatalyst and (iii) an external donor represented by formula (I) Si(OCHCH)(NRR) wherein Rand Rcan be the same or different a represent a hydrocarbon group having 1 to 12 carbon atoms, their production and use.