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:
Jul. 08, 2014
Filed:
Jan. 18, 2011
Choon Kooi Chai, Overijse, BE;
Luc Marie Ghislain Dheur, Brussels, BE;
Benoit Koch, Hannut, BE;
Stefan Klaus Spitzmesser, Brussels, BE;
Choon Kooi Chai, Overijse, BE;
Luc Marie Ghislain Dheur, Brussels, BE;
Benoit Koch, Hannut, BE;
Stefan Klaus Spitzmesser, Brussels, BE;
Ineos Manufacturing Belgium NV, Antwerp, BE;
Abstract
Copolymers of ethylene and α-olefins having (a) a density (D) in the range 0.900-0.940 g/cm, (b) a melt index MI(2.16 kg, 190° C.) in the range of 0.01-50 g/10 min, (c) a melt index MI(2.16 kg, 190° C.) and Dow Rheology Index (DRI) satisfying the equation [DRI/MI]>2.65, and (d) a Dart Drop Impact (DDI) in g of a blown film having a thickness of 25 μm produced from the copolymer satisfying the equation DDI≧1900×{1−Exp [−750(D−0.908)]}×{Exp [(0.919−D)/0.0045]}. The copolymers may be prepared using metallocene catalysis and are preferably prepared in multistage processes carried out in loop reactors in the slurry phase. The copolymers exhibit long chain branching as defined by Dow Rheology Index (DRI) and exhibit unexpected improvements in mechanical properties, in particular dart drop impact, when extruded into blown films.