Patent application number | Description | Published |
20090306323 | POLYOLEFIN FILM - A film of an ethylene polymer. | 12-10-2009 |
20100029871 | Catalyst System, Process for Olefin Polymerization, and Polymer Compositions Produced Therefrom - Provided are catalyst systems, processes for polymerizing one or more olefins, polymers resulting therefrom, and articles prepared from such polymers. The processes comprise contacting under polymerization conditions one or more olefin monomers, preferably propylene, with a catalyst system comprising a transition metal compound and an activator of the formula (1) or (2) as described herein. The polymer compositions described herein exhibit advantageously narrow composition distributions and high melting points in comparison to conventional polymers having the same comonomer content. The polymers described herein exhibit improved properties, e.g., pellet stability, impact properties, heat seal properties, and structural integrity in film and fabricated parts applications. | 02-04-2010 |
20100144989 | METHODS OF CONTROLLING POLYMER PROPERTIES - The invention generally provides for methods for controlling polymer properties. In particular, invention provides for methods for controlling the comonomer composition distribution of polyolefins such as ethylene alpha-olefin copolymers by altering at least one or more of the following parameters: the molar ratio of hydrogen to ethylene, the molar ratio of comonomer to ethylene, the partial pressure of ethylene, and the reactor temperature without substantially changing the density and/or the melt index of the copolymer. | 06-10-2010 |
20100234547 | Polymerization Catalysts, Methods of Making, Methods of Using, and Polyolefin Products Made Therefrom - Olefin polymerization catalyst systems including a high molecular weight catalyst compound and a low molecular weight catalyst compound, and methods of making same are provided. High molecular weight catalysts include metallocene catalysts and low molecular weight catalysts include non-metallocene compounds including biphenyl phenol compounds. Generally catalyst systems may include less than about 5.0 mol % of the high molecular weight catalyst compound relative to said low molecular weight catalyst. Methods for olefin polymerization including the aforementioned catalyst systems, and polyolefins and products made therefrom. | 09-16-2010 |
20100261861 | Polymerization Catalysts and Methods of Using the Same to Produce Polyolefin Products - Polymerization catalyst systems including three or more catalyst compounds are provided. Methods for olefin polymerization including the aforementioned catalyst systems are also provided. | 10-14-2010 |
20100273692 | Ethylene-Based Copolymers, Lubricating Oil Compositions Containing the Same, and Methods for Making Them - Provided are ethylene-based copolymers, methods of preparing the same, lubricating oil compositions including the same, methods for preparing such lubricating oil compositions, and end uses for such ethylene-based copolymers and lubricating oil compositions. The ethylene-based copolymers may include less than about 80 wt. % of units derived from ethylene and one or more alpha-olefin comonomers having 3 to 20 carbon atoms. The ethylene-based copolymers have a melting peak (Tm), as measured by DSC, of 80° C. or less, and a polydispersity index of about 2.8 or less. In some embodiments, the ethylene-based copolymers have an intramolecular composition distribution of about 50 wt. % or less and/or an intermolecular composition distribution of about 50 wt. % or less. | 10-28-2010 |
20100273693 | Polymeric Compositions Useful as Rheology Modifiers and Methods for Making Such Compositions - Disclosed are rheology modifiers comprising compositionally disperse polymeric compositions and/or crystallinity disperse polymeric compositions that may be useful in modifying the rheological properties of lubrication fluids, and methods for making such compositions. The compositionally disperse polymeric composition are formed from at least two discrete compositions of ethylene copolymers. The crystallinity disperse polymeric composition are formed from ethylene copolymers having at least two discrete values of residual crystallinity. | 10-28-2010 |
20100273936 | Finishing Process for Amorphous Polymers - Extruded, copolymer pellet compositions and methods for making the same. A copolymer pellet composition can have an ethylene content of about 40 wt % to about 50 wt % and a propylene content of about 50 wt % to about 60 wt %, based on total weight of the copolymer, wherein the copolymer has a MFR (230° C./2.16 kg) of from about 3.0 g/10 min and about 25 g/10 min; a MWD (Mw/Mn) of about 2.3 or less; and no measurable melting peak, as measured by DSC. | 10-28-2010 |
20100316820 | Composite Materials Comprising Propylene-Based Polymer Blend Coatings - Coated composite materials and methods for their manufacture are described. In particular, embodiments of the present invention include a substrate material coated on at least a portion with a polymer blend comprising from about 50 to about 95 wt % of a propylene-based copolymer comprising propylene and from about 3 to about 40 wt % ethylene-derived units and from about 5 to about 50 wt % of a hydrocarbon resin. The propylene-based copolymer has a melting temperature less than about 110° C., a heat of fusion less than about 75 J/g, and a triad tacticity greater than 75%. The coating compositions are soft to the touch and have a low coefficient of friction, low haze, and are able to retain textural design features. Methods for forming such coated composite materials are also provided. | 12-16-2010 |
20110024951 | Composite Materials Comprising Propylene-Based Polymer Blend Coatings - Coated composite materials and methods for their manufacture are described. In particular, embodiments of the present invention include a substrate material coated on at least a portion with a polymer blend comprising from about 50 to about 95 wt % of a propylene-based copolymer comprising propylene and from about 3 to about 40 wt % ethylene-derived units and from about 5 to about 50 wt % of a hydrocarbon resin. The propylene-based copolymer has a melting temperature less than about 110° C., a heat of fusion less than about 75 J/g, and a triad tacticity greater than 75%. The coating compositions are suitable for hot fill applications, soft to the touch and have a low coefficient of friction, low haze, and are able to retain textural design features. Methods for forming such coated composite materials are also provided. | 02-03-2011 |
20110040041 | Polymerization Processes Using Metallocene Catalysts, Their Polymer Products and End Uses - A process for the production of an ethylene alpha-olefin copolymer is disclosed, the process including polymerizing ethylene and at least one alpha-olefin by contacting the ethylene and the at least one alpha-olefin with a metallocene catalyst in at least one gas phase reactor at a reactor pressure of from 0.7 to 70 bar and a reactor temperature of from 20° C. to 150° C. to form an ethylene alpha-olefin copolymer. The resulting ethylene alpha-olefin copolymer may have a density D of 0.927 g/cc or less, a melt index (I | 02-17-2011 |
20110059277 | Elastomeric Surface Coatings for Plastic Articles - Coated articles and methods for making the same. The coated article includes a plastic substrate with a coating layer at least partially disposed about the substrate. The coating layer can include at least one propylene copolymer comprising 60 wt % to 98 wt % propylene derived units and 2 wt % to 40 wt % one or more other alpha olefins. The propylene copolymer preferably has a triad tacticity of 90% or more, a heat of fusion of less than 80 J/g, a weight average molecular weight (Mw) as measured by GPC of from 70,000 to 250,000, and a MWD of 2.0 to 2.5. | 03-10-2011 |
20110086990 | Ethylene-Alpha Olefin Copolymers and Polymerization Processes for Making the Same - A process for the production of an ethylene alpha-olefin copolymer is disclosed. The process includes polymerizing ethylene and at least one alpha-olefin by contacting the ethylene and the at least one alpha-olefin with a metallocene catalyst in at least one gas phase reactor at a reactor pressure of from 0.7 to 70 bar and a reactor temperature of from 20° C. to 150° C. to form an ethylene alpha-olefin copolymer. The resulting ethylene alpha-olefin copolymer may have a density of 0.927 g/cc or greater and environmental stress crack resistance (ESCR) of 500 hr or more when measured according to ASTM 1693/B in 10% Igepal. | 04-14-2011 |
20110098422 | POLYETHYLENE COMPOSITIONS HAVING IMPROVED PROPERTIES - Polyethylene compositions having improved properties are provided. In one aspect, a polyethylene composition having a long chain branching index (g′ | 04-28-2011 |
20110183878 | Ethylene Copolymers, Methods for Their Production, and Use - Provided is an ethylene copolymer having 40 wt. % to 70 wt. % of units derived from ethylene and at least 30 wt. % of units derived from at least one α-olefin having 3 to 20 carbon atoms and has the following properties:
| 07-28-2011 |
20110183879 | Lubricating Oil Compositions and Method for Making Them - Provided are ethylene propylene copolymers compositions thereof and methods for making the same. The composition may include an ethylene copolymer, comprising 40 wt % to 70 wt % of units derived from ethylene, and at least 30 wt % of units derived from at least one α-olefin having 3 to 20 carbon atoms. The composition can have a melting point (Tm) in ° C., as measured by DSC, that satisfies the relation: Tm>3.4×E−180, where E is the weight % of units derived from ethylene in the copolymer. The composition can also have a Mw/Mn ratio of about 1.5 to about 3.5. The composition can further have a content of Group 4 metals derived from a catalyst of 25 ppm or less. | 07-28-2011 |
20110184134 | Copolymers, Compositions Thereof, and Methods for Making Them - Provided are amorphous ethylene propylene copolymer, compositions thereof, and methods for making same, whereby the copolymer can include of from about 40 wt. % to about 60 wt. % ethylene derived units; and of from about 60 wt. % to about 40 wt. % propylene derived units. The copolymer can be characterized by having no discernable melting point as measured by DSC, an MFRR (MI (2.16 kg; 230° C.)/MI 21.6 kg; 230° C.) of about 38 or more, a molecular weight distribution (MWD) of from about 1.5 to about 2.5, and a shear viscosity η* at 0.01 rad/sec measured at 70° C. that satisfies the relation |η*| | 07-28-2011 |
20110207888 | Elastomeric Polymer Blends and Processes for Their Production - Elastomeric polymer blends and processes for their production are described. Specifically, the polymer blends comprise a first polymer and a second polymer, where the first polymer comprises from about 70 wt % to about 90 wt % units derived from propylene and from about 10 wt % to about 30 wt % units derived from ethylene and/or a C | 08-25-2011 |
20120028865 | Viscosity Modifiers Comprising Blends of Ethylene-Based Copolymers - The present invention is directed to polymer blend compositions for use as viscosity modifiers comprising at least three ethylene-based copolymer components. The viscosity modifiers described herein comprise a first ethylene-based copolymer having an ethylene content of from about 35 to about 55 wt % and/or a heat of fusion of from about 0 to about 30 J/g, a second ethylene-based copolymer having an ethylene content of from about 55 to about 85 wt % and/or a heat of fusion of from about 30 to about 50 J/g, and a third ethylene-based copolymer having an ethylene content of from about 65 to about 85 wt % and/or a heat of fusion of from about 40 to about 70 J/g. The invention is also directed to lubricant compositions comprising a lubricating basestock and a polymer blend as described herein. | 02-02-2012 |
20120028866 | Viscosity Modifiers Comprising Blends of Ethylene-Based Copolymers - The present invention is directed to polymer blend compositions for use as viscosity modifiers comprising at least two ethylene-based copolymer components. The viscosity modifiers described herein comprise a first ethylene-based copolymer having an ethylene content of from about 44 to about 52 wt % and/or a heat of fusion of from about 0 to about 15 J/g and a second ethylene-based copolymer having an ethylene content of from about 68 to about 75 wt % and/or a heat of fusion of from about 40 to about 65 J/g. The invention is also directed to lubricant compositions comprising a lubricating basestock and a polymer blend of the invention. | 02-02-2012 |
20120028867 | Ethylene Based Copolymer Compositions as Viscosity Modifiers and Methods for Making Them - Polymeric compositions and methods for making and using the same are provided. The polymeric composition can include a first ethylene-based copolymer and a second ethylene-based copolymer. The first ethylene-based copolymer can have a weight percent of ethylene-derived units based on a weight of the polymeric composition (E | 02-02-2012 |
20120041164 | Methods of Controlling Polymer Properties - The invention generally provides for methods for controlling polymer properties. In particular, invention provides for methods for controlling the comonomer composition distribution of polyolefins such as ethylene alpha-olefin copolymers by altering at least one or more of the following parameters: the molar ratio of hydrogen to ethylene, the molar ratio of comonomer to ethylene, the partial pressure of ethylene, and the reactor temperature without substantially changing the density and/or the melt index of the copolymer. | 02-16-2012 |
20120271017 | Catalyst Systems Having a Tailored Hydrogen Response - A polymerization catalyst system and polymerization processes using the catalyst systems are disclosed. The polymerization catalyst systems may include a) a first catalyst compound, and b) a second catalyst compound, wherein the first catalyst compound comprises a biphenyl phenol compound having essentially no hydrogen response. | 10-25-2012 |
20130085092 | RHEOLOGICAL METHODS TO DETERMINE THE PREDISPOSITION OF A POLYMER TO FORM NETWORK OR GEL - A method is provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, measuring the shear stress as a function of shear rate, determining the yield stress using the Herschel-Bulkley equation and assessing the yield stress. A method is also provided to determine the predisposition of a polymer to form network or gel in a lubricating oil which comprises obtaining a composition of a polymer in a diluent, determining at least one of (i) the storage modulus G′ and loss modulus G″ of the composition by subjecting the composition to sinusoidal (oscillating) stress or strain of certain amplitude and frequency, (ii) the phase lag (angle) of the response strain or stress δ, or (iii) the tangent (tan) δ, and (c) assessing at least one of the G′, G″, δ, or tan(δ) determined. | 04-04-2013 |
20130131256 | Polymeric Compositions Useful as Rheology Modifiers and Methods for Making Such Compositions - Disclosed are rheology modifiers comprising compositionally disperse polymeric compositions and/or crystallinity disperse polymeric compositions that may be useful in modifying the rheological properties of lubrication fluids, and methods for making such compositions. The compositionally disperse polymeric composition are formed from at least two discrete compositions of ethylene copolymers. The crystallinity disperse polymeric composition are formed from ethylene copolymers having at least two discrete values of residual crystallinity. | 05-23-2013 |
20130143461 | Polymer Compositions and Nonwoven Compositions Prepared Therefrom - Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C | 06-06-2013 |
20130203640 | POLYMER COMPOSITIONS HAVING IMPROVED PROPERTIES AS VISCOSITY INDEX IMPROVERS AND USE THEREOF IN LUBRICATING OILS - Polymer compositions for use as viscosity modifiers comprising at least two ethylene-based copolymer components are provided. The polymer composition comprises (a) a first ethylene-α-olefin copolymer and (b) a second ethylene-α-olefin copolymer. The first ethylene-α-olefin copolymer (a) has an ethylene content from about 60 to about 80 wt % and the second ethylene-α-olefin copolymer (b) has an ethylene content of less than about 60 wt %. The first ethylene-α-olefin copolymer (a) has a Melt Flow Rate Ratio (MFRR), defined as the ratio of the MFR measured at 230° C./21.6 kg and at 230° C./2.16 kg, of greater than 30 and optionally also has a Melt Flow Rate (MFR) of at least about 1.5 g/10 min, measured by ASTM D 1238 condition L (230° C./2.16 kg). The present disclosure is also directed to lubricant compositions comprising a lubricating basestock and a polymer composition of the present disclosure and is further directed to reducing gelation in the lubricant compositions. | 08-08-2013 |
20130203641 | Process for the Production of Polymeric Compositions Useful as Oil Modifiers - Provided are processes for making polymer compositions, especially those with reduced or no gel formation in lubricating oils as identified by rheological and visual gel tests and which are useful as viscosity modifiers. The processes described herein aim to achieve this objective by adjusting the concentrations of the hydrogen feed(s) in the first and/or second polymerization reaction zones, preferably such that (a) the hydrogen feed concentration in the first polymerization reaction zone is 0.0-1.0 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, α-olefin comonomer, and solvent into the first polymerization reaction zone, and/or (b) the hydrogen feed concentration in the second polymerization reaction zone is 0.0-0.5 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, α-olefin comonomer, and solvent into the second polymerization reaction zone. | 08-08-2013 |
20130281339 | Ethylene-Based Copolymers, Lubricating Oil Compositions Containing the Same, and Methods for Making Them - Provided are ethylene-based copolymers, methods of preparing the same, lubricating oil compositions including the same, methods for preparing such lubricating oil compositions, and end uses for such ethylene-based copolymers and lubricating oil compositions. The ethylene-based copolymers may include from about 35 wt. % to about 60 wt. % of units derived from ethylene and at least 1.0 wt. % of one or more alpha-olefin comonomers having 3 to 20 carbon atoms. The ethylene-based copolymers are substantially amorphous and have a polydispersity index of about 2.8 or less. | 10-24-2013 |
20130281340 | Lubricant Compositions Comprising Ethylene Propylene Copolymers and Methods for Making Them - Lubricant compositions, as well as processes for their formulation, are provided. The lubricant compositions comprise an oil basestock and one or more blocky ethylene propylene copolymers. The copolymers are preferably prepared using metallocene catalyst systems but without using a chain shuttling agent. | 10-24-2013 |
20130281641 | Blocky Ethylene Propylene Copolymers and Methods for Making Them - Copolymers comprising ethylene and propylene and methods for producing such polymers are provided. The polymers are blocky copolymers having semicrystalline ethylene sequences and amorphous or low crystallinity propylene sequences. The polymers are preferably prepared using metallocene-based catalyst systems but without the use of a chain shuttling agent. The polymers may have higher melting temperatures than previously known random copolymers or blocky copolymers prepared with chain shuttling agents having similar comonomer contents. The polymers include both ethylene-rich and propylene-rich copolymers. | 10-24-2013 |
20140038486 | Catalyst System, Process For Olefin Polymerization, And Polymer Compositions Produced Therefrom - Provided are catalyst systems, processes for polymerizing one or more olefins, polymers resulting therefrom, and articles prepared from such polymers. The processes comprise contacting under polymerization conditions one or more olefin monomers, preferably propylene, with a catalyst system comprising a transition metal compound and an activator of the formula (1) or (2) as described herein. The polymer compositions described herein exhibit advantageously narrow composition distributions and high melting points in comparison to conventional polymers having the same comonomer content. The polymers described herein exhibit improved properties, e.g., pellet stability, impact properties, heat seal properties, and structural integrity in film and fabricated parts applications. | 02-06-2014 |
20140080982 | Ethylene Copolymers, Methods for Their Production, and Use - Provided is an ethylene copolymer having 40 wt. % to 70 wt. % of units derived from ethylene and at least 30 wt. % of units derived from at least one α-olefin having 3 to 20 carbon atoms and has the following properties:
| 03-20-2014 |
20140194845 | Polymer Compositions and Nonwoven Compositions Prepared Therefrom - Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C | 07-10-2014 |