US 8,475,899 B2 · Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches

Abstract

The present invention provides a polymerization process which is conducted by contacting an olefin monomer and at least one olefin comonomer in the presence of hydrogen and a metallocene-based catalyst composition. Polymers produced from the polymerization process are also provided, and these polymers have a reverse comonomer distribution, low levels of long chain branches, and a ratio of Mw/Mn from about 3 to about 6.

Claims22

Dependent claims

An ethylene polymer having a melt index from about 0.1 to about 100 g/10 min;

a ratio of Mw/Mn from about 3 to about 6;
a reverse comonomer distribution;
less than about 0.008 long chain branches (LCB) per 1000 total carbon atoms;
and less than about 5% by weight of the polymer eluted below a temperature of 40° C. in an ATREF test.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

13/310,841Filed 5 Dec 2011 · division

Priority

18 Dec 2008

Published

US 2012/0141710 A17 Jun 2012

Granted

2 Jul 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

C08F 210/16
Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: copolymers of ethene with alpha-alkenes, e.g. EP…
C08F 4/65912
Component covered by group C08F4/64 containing a transition metal-carbon bond: in combination with an organoaluminium compound
C08F 4/65916
Component covered by group C08F4/64 containing a transition metal-carbon bond: supported on a carrier, e.g. silica, MgCl2, polymer
C08F 2410/07
Features related to the catalyst preparation, the catalyst use or to the deactivation of the catalyst: catalyst support treated by an anion, e.g.…

Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches

Life of this patent

Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches

Life of this patent

Abstract

Claims22