Exxonmobil Chemical Patents Inc.

Univation Technologies, LLC

Stefan B Ohlsson

Prasadarao Meka

George James Pehlert

Saifudin M Abubakar

Jan Cyriel Donck

Michael Jan Vinck

Jef Vaes

Bart Lauwers

Mark Gregory Goode

Ching-Tai Lue

Chi-I Kuo

Dongming Li

Yong Yang

Paul M German, Jr

Danny Van Hoyweghen

Mosha H Zhao

Steven A Best

Etienne R H Lernoux

Peter William Manders

Qi Tang

Donald Andrew Winesett

David Silagy

Alan M Malakoff

Juliet Bauer Wagner

Jerry Michael Johnson

Achiel Jos Van Loon

Gregory K Hall

Willy J J Leysen

Sasha P Schmitt

Giriprasath Gururajan

Xiao-Chuan Wang

Zhen-Yu Zhu

Dirk J Permentier

Marc D Tierens

Ying Zou

Anna C Claerbout

Simone Viganò

Mario Bastiaens

Gerd Artur Allermann

Edward F Allen, Jr

Willy Jozef Joanna Leysen

Maciej M Pasniewski

Jasper Holsbeek

Bradley A Kramer

Sushanta Dhar Roy

Willy Jj Leysen

Francois H Chambon

Yves Demay

Jean-Francois Agassant

Edward Y Bylina

Peter N Bailey

Michael Martin-Gatuis

Xin Yue Zhang

Jr Edward F Allen

Marc Tierens

The present disclosure relates to compositions including copolymers, and methods for making compositions. In an embodiment, a composition includes the product of a copolymer comprising at least 50 mol % propylene and at least 1 wt % of at least one of ethylene or a Cto Cα-olefin, based on the total weight of the copolymer; and an organic peroxide. The copolymer has Mw/Mnof from 1 to 5. In an embodiment, a process to form a composition includes introducing a copolymer with an organic peroxide, the copolymer comprising at least 50 mol % propylene and at least 1 wt % of at least one of ethylene or a Cto Cα-olefin, based on the total weight of the copolymer; and obtaining a composition comprising a product of the copolymer and the organic peroxide. The copolymer has Mw/Mnof from 1 to 5.

Strain hardened polypropylene copolymer compositions

The present disclosure provides polyolefin compositions and films and method for producing such films. The polyolefin composition contains about 40 wt % to about 95 wt % of a BOCD polyethylene and about 10 wt % to about 60 wt % of a polypropylene, by weight of the polyolefin composition. The polyolefin composition has a 1% secant flexural modulus MD of greater than 250 MPa and a 1% secant flexural modulus TD of greater than 300 MPa, as determined for a layer of the polyolefin composition having a thickness of about 50 μm and a Dart Impact (Method A) of greater than 15 g/μm and an Elmendorf tear MD of greater than 7 g/μm, as determined for a film containing the polyolefin composition and having a thickness of about 90 μm.

Polyolefin compositions suitable for films

Provided are oriented films comprising linear low density polyethylene polymer and having improved balance of properties including improved machine direction tear strength. The oriented polymer film has at least one layer comprising 50 to 100 wt. % of an ethylene-based polymer. The MDO polymer film has a normalized MD Elmendorf Tear (ASTM D-1922) of at least 40 g/&#x3bc;m. In certain embodiments, the MDO polymer film surprisingly does not tear when MD Elmendorf Tear is measured according to ASTM D-1922.

Oriented films comprising ethlyene-based polymers and methods of making same

Multilayer foam films including a core layer and two skin layers, (i) the core layer including the product of the combination of an LDPE composition, at least one blend partner and at least one foaming agent; and (ii) the two skin layers each independently including the product of the combination of an ethylene 1-hexene copolymer and at least one additive; wherein the core layer is disposed between the two skin layers, are provided. Methods for making the multilayer foam films are also provided.

Multilayer foam films and methods for making the same

A process to prepare a polypropylene, and the polypropylene and films therefrom, comprising combining a high melt strength polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g') of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190&#xb0; C., and within the range from 20 to 1000 ppm of a long half-life organic peroxide, and isolating the polypropylene, wherein the polypropylene thus formed has a molecular weight distribution (Mw/Mn) within a range of from 7 to 22, a z-average molecular weight of less than 1,600,000 g/mole, a branching index (g&#x2032;) of at least 0.95; and a melt strength less than 20 cN.

Polypropylene for films and the films therefrom

Methods and systems for making a film made of dynamically vulcanized thermoplastic elastomeric material are provided herein. The subject methods and systems achieve dimensional stability of an elastic film by applying thermal treatment as part of the film making process and enhance the shrinkage of the film by intentionally with stretching the film while hot and freezing the film in the stretch. The systems and methods are useful in controlling shrinkage of DVA post film extrusion.

Methods of making a film of dynamically vulcanized thermoplastic elastomeric materials

Described is a polyethylene composition comprising at least one polyethylene having a crystallinity of less than 60, or 55, or 50% and within a range from 0.2 wt % to 15 wt % of cyclic-olefin copolymer and within a range from 0.2 wt % to 15 wt % of hydrocarbon resin, by weight of the polyethylene composition. The polyethylene compositions can be formed into useful articles such as films and injection molded and thermoformed articles.

Polyethylene compositions and articles manufactured therefrom

Disclosed herein are embodiments of films which comprise a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, and a branching index (g') of at least 0.95.

Articles comprising broad molecular weight distribution polypropylene resins

Disclosed herein are embodiments of films which comprise a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g') of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190&#xb0; C. A method of making a film is also disclosed.

The invention relates to a blown film coextrusion process. The process involves extruding core contact layers through a die exit at a specified speed and cooling, orienting and crystallizing the multi-layer film formed at a specified deformation rate to form a the frost line is a specified distance from the die exit by withdrawing film at a take up speed. The core and core contact layers are of a film forming polymer composition comprising at least 90 wt % of ethylene based polymer. The ethylene based polymer of the core layer has an average density of ethylene based polymers equal to or higher than that of ethylene based polymer of the core contact layers. The invention specifically concerns the feature that the core layer composition contains a portion of and the composition of the core contact layers contains a portion of a linear polyethylene so as to make the core layer more resistant to deformation than the skin layers.

Coextrusion processes for making multilayer films and films made thereby

A multilayer blown film with improved strength or toughness comprising a layer comprising a metallocene polyethylene (mPE) having a high melt index ratio (MIR), a layer comprising an mPE having a low MIR, and a layer comprising a HDPE, and/or LDPE. Other embodiments have skin layers and a plurality of sublayers. At least one sublayer includes an mPE, and at least one additional sublayer includes HDPE and/or LDPE. The mPE has a density from about 0.910 to about 0.945 g/cm, MI from about 0.1 to about 15, and melt index ratio (MIR) from about 15 to 25 (low-MIR mPE) and/or from greater than 25 to about 80 (high-MIR mPE). A process is related to supplying respective melt streams for coextrusion at a multilayer die to form a blown film having the inner and outer skin layers and a plurality of sublayers, wherein the skin layers and at least one of the sublayers comprise mPE and at least one of the sublayers comprise HDPE, LDPE or both. Draw-down, blow-up ratios and freeze-line distance from the die are controlled to facilitate a high production rate.

Multilayer polyolefin blown film

A high clarity, high throughput film comprising at least two skin layers and at least one core layer there between, wherein the skin layers comprise at least one linear ethylene-&#x3b1;-olefin copolymer having an I/Iof greater than 20; a density within the range from 0.910 to 0.945 g/cmand CDBI of less than 40; and the core layer comprises at least one polyethylene having an overall density of at least 0.910 g/cm; wherein the film has a dart impact (ASTM D1709) of greater than 10 g/&#x3bc;m and a Haze (ASTM D1003 method B) of less than 10%.

High MIR linear polyethylenes and coextruded films therefrom

Provided is a method for making a polyolefin comprising contacting one or more olefins in a reactor containing a catalyst; polymerizing the one or more olefins to produce an olefin polymer characterized by a first melt flow ratio (MFR) and a first haze; and altering the reaction temperature in the reactor to shift the first MFR to a MFR that is different than the first MFR and to shift the first haze to a haze that is different than the first haze.

Methods for making polyolefin products having different shear thinning properties and haze

The present invention relates to polymer blends comprising: (a) from 5 wt % to 95 wt % of a HDPE having a density from 0.941 g/cmto 0.980 g/cmand an Iof 10 dg/min or more; and (b) from 95 wt % to 5 wt % of a grafted mPE, which is a reaction product of (i) a mPE having a density from 0.860 g/cmto 0.935 g/cmand an Ifrom 0.7 dg/min to 5.0 dg/min, and (ii) a silicon-containing grafting component, wherein the blend exhibits a high-temperature creep after extrusion that is at least 20% lower than a blend of the HDPE and the mPE that has not been grafted with a silicon-containing grafting component. These blends can advantageously comprise at least one layer of a film, e.g., made via extrusion.

Silicon-containing ethylene-based polymer blends, methods for making same, and articles made therefrom

This invention relates to blends of linear low density polyethylene copolymers with other linear low density polyethylenes or very low density, low density, medium density, high density, and differentiated polyethylenes. The invention also includes articles produced from the linear low density polyethylene and polyethylene blends described.

Linear low density polymer blends and articles made therefrom

Growing community of inventors

Keerbergen, Belgium

Stefan B Ohlsson