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:
Mar. 05, 2019
Filed:
Sep. 17, 2012
Basell Poliolefine Italia S.r.l., Milan, IT;
Monica Galvan, Ferrara, IT;
Roberto Pantaleoni, Ferrara, IT;
Ofelia Fusco, Ferrara, IT;
Benedetta Gaddi, Ferrara, IT;
Andreas Neumann, Ferrara, IT;
Antonio Mazzucco, Ferrara, IT;
Gianni Collina, Ferrara, IT;
Gabriella Sartori, Ferrara, IT;
Basell Poliolefine Italia S.r.l., Milan, IT;
Abstract
A process for the preparation of high purity propylene polymers carried out in the presence of a catalyst comprising the product obtained by contacting: (a) a solid catalyst component comprising Mg, Ti and at least a first internal electron donor compound (1ID) selected among the succinates and a second internal electron donor compound (2ID) selected among the 1,3-diethers, wherein the molar ratio of first internal donor over second internal donor 1ID:2ID is comprised between 4:6 and 9:1, with(b) an organo-aluminum compound, and optionally with(c) an external electron donor compound,said process being carried out at a temperature equal or higher than 78° C. and by employing a molar ratio of organo-aluminum compound over solid catalyst component (b):(a) of lower than 5.