Nova Chemicals (international) S.a.

Nova Chemicals Inc.

Ineos Europe Limited

Ineos Sales Limited

Umesh Karnik

Sergio Alejandro Guillen-castellanos

Michael Ching-yuen Kwan

Peter Phung Minh Hoang

Victoria Ker

Mark Kelly

George Franklin Kingston

Shivendra K Goyal

Patrick Lam

Brian Stephen Kimberley

Shivendra Kumar Goyal

Qinyan Wang

Dusan Jeremic

Amy Baltimore

Tyler Craig

Sergio Alejandro Guillen-Castellanos

Charles Russell

Perry De Wit

Savini Udara Suduweli Kondage

James Joseph McEachern

Jessamyn Ross Logan

Peter Phung Ming Hoang

Timothy Walter Wiwchar

Savini Udara Kondage

Amy Marie Baltimore

Perry Montyn De Wit

Savini Kondage

James Mceachern

Jessamyn Logan

Michael Ching-Yuen Kwan

The disclosure provides an ethylene copolymer having a density of from 0.912 g/cmto 0.925 g/cm, a melt flow ratio (I/I) of from 20 to 30, and a normal comonomer distribution profile in a GPC-FTIR analysis, wherein the normal comonomer distribution profile has a slope of from &#x2212;3.5 to &#x2212;7.5, where the slope is defined as the number of short chain branches per 1000 carbons at a molecular weight of 300,000 minus the number of short chain branches per 1000 carbons at a molecular weight of 30,000. The ethylene copolymers have improved bulk density and when made into film, provide good physical properties.

Ethylene copolymer having enhanced film properties

A method is provided to control the short chain branching (SCB) distribution of an ethylene-butene (EB) polyethylene resin that is prepared in a gas phase polymerization process using a specific type of magnesium-titanium Ziegler Natta catalyst. The method allows the level of short chain branching to be increased in the low molecular weight fraction of the resin by increasing the polymerization residence time. The polymers that are produced in accordance with this invention may be useful for the preparation of cast films and blown films, especially for stretch film applications.

Short chain branching control on ethylene-butene copolymers

Some embodiments herein disclose a process for producing an ethylene polymer or copolymer which contains less than 5 ppm titanium and has a bulk density, in granular form, of at least 22.5 lbs/ft, using a spheroidal Ziegler-Natta type olefin polymerization catalyst having a particle size distribution characterized by a Dm*/Dn of less than 3.0 and comprising a titanium compound, an aluminum compound, and a spheroidal magnesium chloride support.

Process for polymerization using dense and spherical ziegler-natta type catalyst

The present invention provides a process for preparing a catalyst useful in gas phase polymerization of olefins wherein the hydrogen response of the catalyst can be improved by using a ketone as the electron donor in the catalyst. The catalyst consists of compounds of Ti, Mg, Al and a ketone preferably supported on an amorphous support.

Hydrogen response through catalyst modification

The present invention provides a novel process for preparing a catalyst useful in gas phase polymerization of olefins wherein the physical properties of the polymer and the productivity of the catalyst can be altered depending on the sequence of addition of the catalyst components. The catalyst consists of compounds of Ti, Mg, Al and optionally an electron donor supported on an amorphous support.

Enhanced polyolefin catalyst

Some properties such as dart impact strength, hexane extractables and resin stickiness of a polyethylene copolymer produced in a gas phase polymerization using a Ziegler-Natta catalyst are better controlled by regulating the ratio of aluminum from the co-catalyst to the polymer production rate. This enables one to improve properties such as dart impact strength and reduce hexane extractables by changing the amount of co-catalyst fed into the reactor.

Polymer control through co-catalyst

The present invention provides a novel process for preparing a catalyst, preferably free of electron donor, useful in gas phase polymerization of olefins having a broad polydispersity.

Split aluminum addition process for making catalyst

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Airdrie, Canada

Mark Kelly