RHEOLOGY MODIFIED RELATIVELY HIGH MELT STRENGTH POLYETHYLENE COMPOSITIONS AND METHODS OF MAKING PIPES, FILMS, SHEETS, AND BLOW-MOLDED ARTICLES

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein. © KIPO & WIPO 2007 ...

PROCESS FOR PRODUCING HIGH QUALITY IONOMERS

A reactive extrusion process for producing an ionomer is disclosed. The process comprising adding a polymer containing a carboxyl functionality to an extruder, then homogenously melting the polymer in a melting zone of the extruder. A first melt seal zone of the extruder is formed to separate the melting zone from an injection zone where an aqueous solution of metallic ions are added to the molten polymer. The first melt seal zone is formed by increasing the pressure in the melt seal zone to a pressure which is higher than the vapor pressure of the water at any point in the injection zone and the reaction zone. The aqueous solution of metallic ions is then mixed with the polymer containing the carboxyl functionality in a reaction zone of the extruder under conditions such that the metallic ions are substantially reacted with the carboxyl functionality. A pressure build-up zone is formed in the extruder, wherein the pressure build-up zone is located no earlier than at the end of the reaction ...

METHOD FOR IMPROVING THE BUBBLE STABILITY OF A POLYETHYLENE COMPOSITION SUITABLE FOR BLOWN FILM EXTRUSION PROCESS

The instant invention provides a method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process. The method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process comprises the steps of: (1) providing a polyethylene composition having a density in the range of 0.900 g/cm 3 to 0.970 g/cm 3 and an relaxation spectrum index (RSI) value in the range of 10 to 100; (2) oxygen tailoring said polyethylene composition; (3) thereby forming an oxygen tailored polyethylene composition, wherein the RSI value of the said oxygen tailored polyethylene composition increases from 10% to 300% of its initial value; (4) thereby improving the bubble stability of said polyethylene composition.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention includes a multimodal polyethylene composition has (1) a density of at least about 0.940 g/cm³ as measured by ASTM Method D-1505; (2) a melt flow index (I₅) of from about 0.2 to about 1.5 g/10 min (as measured by ASTM D-1238, measured at 190° C. and 5 kilograms); (3) a melt flow index ratio (I₂₁/I₅) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; (5) a bubble stability measured on specified equipment according to specified conditions for a film of about 6x10^-6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof; the composition comprising; and (6) a dart impact on 12.5 micron (1.25x10^-5 m) film of at least 300 g; measured according to ASTM 1709, Method A; (A) a high molecular weight fraction which; ...

DISPERSIONS OF HIGHER CRYSTALLINITY OLEFINS

Dispersions and methods for forming dispersions that include a higher crystallinity polyolefin and at least one persing agent are disclosed. Various applications for use of the dispersions are also disclosed.

RHEOLOGY MODIFIED RELATIVELY HIGH MELT STRENGTH POLYETHYLENE COMPOSITIONS AND METHODS OF MAKING PIPES, FILMS, SHEETS, AND BLOW-MOLDED ARTICLES

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

POLYETHYLENE RESINS FOR SHEET AND THERMOFORMING APPLICATIONS

This invention relates to coupling of polyethylene resins, more specifically coupling of polyethylene resins for use in extruded profiles, especially extruded profiles for sheet extrusion and cut sheet thermoforming applications and geomembranes. The process involves conveying a HDPE resin through an extruder, wherein the extruder comprises a feed zone, a first melt zone downstream of the feed zone, a second melt zone downstream of the first melt zone, and a third melt zone downstream of the second melt zone. The resin is melted in the first zone, contacted with oxygen in the second melt zone, and contacted antioxidant in the third melt zone.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention is a multimodal polyethylene composition having (1) a density of at least about 0.940 g/cm 3 ; (2) a melt flow index (I 5 ) of from about 0.2 to about 1.5 g/10 mm; (3) a melt flow index ratio (I 21 /I 5 ) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; and (5) a bubble stability measured on an HS50S stationary extrusion system with an BF 10-25 die, HK 300 air ring, A8 take off, and WS8 surface winder, with a 100 mm die diameter having a 50 mm 21:1 L/D grooved feed extruder used for a film of about 6×10 −6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof.

METHOD OF REDUCING GELS IN POLYOLEFINS

A process of producing a polyolefin, in one embodiment a polyethylene, and in a preferred embodiment a bimodal polyethylene including a high molecular weight component and a low molecular weight component, the process including providing a polyolefin having an I21 value of from 2 g/10 min to 100 g/10 min and a density of from 0.91 g/cm3 to 0.97 g/cm3; followed by forming a melt of the polyolefin and passing the polyolefin through one or more active screen filter(s) having a mesh size of from 70 micron to 200 micron at a mass flux of from 5 lb/hr/square inch (3,500 kg/hr/m2) to 100 lb/hr/square inch (70,000 kg/hr/m2); and isolating the polyolefin having passed through the screen filter. © KIPO & WIPO 2008 ...

A method to increase production rate of a continuous mixer or extruder

Dispersions of higher crystallinity olefins

Dispersions and methods for forming dispersions that include a higher crystallinity polyolefin and at least one dispersing agent are disclosed. Various applications for use of the dispersions are also disclosed.

EXTRUDER SCREW

Embodiments of the present disclosure include an extruder screw, (200 -1,200 -2) an extruder screw system (254) having a least one of a first extruder screw (200-1, 200-2) and at least one of a second extruder screw, (200-1, 200-2) an extruder system (250) having the extruder screw system (254), a continuous process for the production of an aqueous dispersion using the extruder system, and an aqueous dispersion formed by the process. For the various embodiments, the extruder screw (200-1, 200-2) includes a mixing and melting segment (266); a high internal phase emulsion segment (268) that includes a kneading block having a plurality of disks with surfaces that define a plurality of channels; a distributing and pumping segment (270); a first seal segment (272) between the mixing and melting segment (266) and the high internal phase emulsion segment (268); a second seal segment (274) between the high internal phase emulsion segment (268) and the distributing and pumping segment (270); and ...

COMPOSITIONS, FILMS AND METHODS OF PREPARING THE SAME

The invention provides a composition comprising at least the following: A) a first composition comprising a first ethylene-based polymer, wherein the ratio, I21 (first composition)/I21 (first ethylene-based polymer), is greater than, or equal to, 30; and B) one or more azide compounds in an amount from 10 g/g to 40 g/g (based on the weight of the composition).

Method of reducing gels in polyolefins

The invention provides a process of producing a polyolefin, in one embodiment a polyethylene, and in a preferred embodiment a bimodal polyethylene including a high molecular weight component and a low molecular weight component, the process including providing a polyolefin having an I21 value of from 2 g/10 min to 100 g/10 min and a density of from 0.91 g/cm<3> to 0.97 g/cm<3>; followed by forming a melt of the polyolefin and passing the polyolefin through one or more active screen filter(s) having a mesh size of from 70 micron to 200 micron at a mass flux of from 5 lb/hr/square inch (3,500 kg/hr/m<2>) to 100 lb/hr/square inch (70,000 kg/hr/m<2>); and isolating the polyolefin having passed through the screen filter.

Method of reducing gels in polyolefins

A process of producing a polyolefin, in one embodiment a polyethylene, and in a preferred embodiment a bimodal polyethylene comprising a high molecular weight component and a low molecular weight component, the process comprising providing a polyolefin having an I₂₁ value of from 2 to 100 g/10 min and a density of from 0.91 to 0.97 g/cm³; followed by forming a melt of the polyolefin and passing the polyolefin through one or more active screen filter(s) having a mesh size of from 70 to 200 micron at a mass flux of from 5 to 100 lbs/hr/square inch; and isolating the polyolefin having passed through the screen filter.

Process for mixing polyvinyl chloride with a bio-based plasticizer

Processes for making a polyvinyl chloride (PVC) dry blend composition with a phthalate-free, bio-based plasticizer and filler, having a bulk density of greater than 0.67 g/cc and an extrusion rate of greater than 65 gm/minute for a single screw extruder of 0.75 in barrel diameter with a 25:1 L:D general purpose polyethylene screw at 75 rotations per minute screw speed, and compositions made by the processes are provided.

POLYETHYLENE COMPOSITIONS, METHODS OF MAKING THE SAME, AND ARTICLES PREPARED THEREFROM

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30° C., and has a coefficient of viscosity average molecular weight (CM ...

Process for producing high quality ionomers

A reactive extrusion process for producing an ionomer is disclosed. The process comprising adding a polymer containing a carboxyl functionality to an extruder, then homogenously melting the polymer in a melting zone of the extruder. A first melt seal zone of the extruder is formed to separate the melting zone from an injection zone where an aqueous solution of metallic ions are added to the molten polymer. The first melt seal zone is formed by increasing the pressure in the melt seal zone to a pressure which is higher than the vapor pressure of the water at any point in the injection zone and the reaction zone. The aqueous solution of metallic ions is then mixed with the polymer containing the carboxyl functionality in a reaction zone of the extruder under conditions such that the metallic ions are substantially reacted with the carboxyl functionality. A pressure build-up zone is formed in the extruder, wherein the pressure build-up zone is located no earlier than at the end of the reaction ...

Polyethylene compositions, methods of making the same, and articles prepared therefrom

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30° C., and has a coefficient of viscosity average molecular weight (CM?) less than −0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70° C. to 90° C. The Mv is the viscosity average molecular weight.

Polyethylene compositions, methods of making the same, and articles prepared therefrom

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30° C., and has a coefficient of viscosity average molecular weight (CMv) less than −0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70° C. to 90° C. The Mv is the viscosity average molecular weight.

Rheology modified relatively high melt strength polyethylene compositions and methods of making pipes, films, sheets, and blow-molded articles

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Dispersions of higher crystallinity olefins

Dispersions and methods for forming dispersions that include a higher crystallinity polyolefin and at least one dispersing agent are disclosed. Various applications for use of the dispersions are also disclosed.

Process for Mixing Polyvinyl Chloride with a Bio-Based Plasticizer

Processes for making a polyvinyl chloride (PVC) dry blend composition with a phthalate-free, bio-based plasticizer and filler, having a bulk density of greater than 0.67 g/cc and an extrusion rate of greater than 65 gm/minute for a single screw extruder of 0.75 in barrel diameter with a 25:1 L:D general purpose polyethylene screw at 75 rotations per minute screw speed, and compositions made by the processes are provided. 1. A process for producing a polyvinyl chloride (PVC) dry blend composition , the process comprising mixing PVC , a phthalate-free bio-based plasticizer , and a filler at a temperature between 25° C. and 70° C. and a time effective to form a dry mixture comprising aggregated PVC particles and a bulk density of greater than 0.67 g/cc.2. The process of wherein the bio-based plasticizer comprises a blend of an epoxidized fatty acid ester and epoxidized fatty acid C-Cester.3. The process of wherein the bio-based plasticizer comprises a blend of epoxidized soybean oil (ESO) and epoxidized methyl ester of soybean oil (soy-eFAME).4. The process of wherein the bio-based plasticizer comprises a 75:25 to 25:75 (w/w) blend of ESO and soy-eFAME.5. The process of wherein said mixing comprises first mixing the PVC with the bio-based plasticizer for a hold time and then mixing the filler with the PVC/plasticizer mixture to form the dry mixture.6. The process of wherein said mixing of the PVC claim 5 , the bio-based plasticizer and the filler is conducted until said bulk density and a drop temperature of 55° C. to 65° C. are reached.7. The process of wherein the PVC dry blend composition comprises:A. 20 to 80 wt % PVC;B. 10 to 40 wt % bio-based plasticizer; andC. 5 to 40 wt % filler.8. The process of wherein the PVC dry blend composition has an extrusion rate of greater than 65 gm/minute for a single screw extruder of 0.75-inch (19 mm) barrel diameter with a 25:1 L:D general purpose polyethylene screw at 75 rotations per minute screw speed.9. The process of wherein ...

High speed and direct driven rotating equipment for polyolefin manufacturing

An apparatus and method for melting polymer is provided. In at least one embodiment, the apparatus includes a housing, two or more rotatable members at least partially contained within the housing, where each rotatable member having a shaft coupled thereto. The apparatus also includes a motor having a drive shaft directly coupled to the shaft of the rotatable members such that the rotatable members rotate at a speed of the motor drive shaft. The rotatable members are preferably non-intermeshing and counter-rotating.

Dispersions of higher crystallinity olefins

DISPERSIONS OF HIGHER CRYSTALLINITY OLEFINS

Dispersions and methods for forming dispersions that include a higher crystallinity polyolefin and at least one dispersing agent are disclosed. Various applications for use of the dispersions are also disclosed. 13-. (canceled)14. A method of forming an aqueous dispersion , comprising:melt kneading (A) at least one higher crystallinity polyolefin, having a crystallinity of greater than 50 percent, and (B) at least one stabilizing agent, to produce a melt-kneaded product;diluting the melt-kneaded product with water; andmelt kneading the resulting mixture to form the dispersion;wherein the polyolefin comprises an ethylene hompolymer, an ethylene/α-olefin copolymer, an ethylene/α-olefin multiblock interpolymer; or combinations of two or more thereof.15. The method of claim 14 , wherein the melt kneading comprises forming the aqueous dispersion in an extrusion apparatus comprising a variable high internal phase emulsion creation zone claim 14 , the method further comprising controlling an extrusion apparatus outlet pressure via a self-cleaning micro-notch V-ball control valve.16. A foam produced from a dispersion prepared by the method of .17. The foam of claim 16 , having a compression set at 85° C. claim 16 , 20 minutes claim 16 , at a pressure of 0.5 psig of less than 70 percent.18. The foam of claim 16 , comprising cells having a size range from about 5 micrometers diameter to about 1000 micrometers diameter.19. The foam of claim 18 , wherein the cells comprise open cells.20. The foam of claim 16 , wherein the dispersion has a viscosity of not more than about 50 claim 16 ,000 cP at 25° C.2122-. (canceled)23. An article formed by a process comprising:impregnating a fibrous structure with a compound;the compound comprising an aqueous dispersion, the dispersion comprising;at least one higher crystallinity polyolefin, having a crystallinity greater than 50 percent;at least one dispersing agent; and water; and wherein the polyolefin comprises an ethylene hompolymer, an ...

Method of Making a Cable Strength Member

Strength members for cable, particularly fiber optic cable, are made by a method comprising the steps of: A. Wetting a fiber, e.g., fiberglass fiber, with an aqueous polymeric dispersion to form a wetted fiber, the dispersion comprising: 1. At least one thermoplastic resin, e.g., a polyolefin; 2. At least one dispersing agent, e.g., a ethylene ethyl acrylate polymer; and 3. Water; B. Removing the water from the wetted fiber, and C. Consolidating the resin on the fiber with or without curing. 1. A method to produce a strength member for cable , the method comprising the steps of: 1. At least one thermoplastic resin;', '2. At least one dispersing agent; and', '3. Water;, 'A. Wetting a fiber with an aqueous polymeric dispersion to form a wetted fiber, the dispersion comprisingB. Removing the water from the wetted fiber, andC. Consolidating the resin on the fiber with or without curing.2. The method of in which steps (B) and (C) are performed sequentially.3. The method of in which steps (B) and (C) are performed simultaneously.4. The method of further comprising the step of applying one or more finish coatings to the fiber surface.5. The method of in which water is removed in step (B) by passing the wetted fiber through a drying oven operating at a temperature of 80° C. to 300° C.6. The method of in which the resin is consolidated in step (C) by passing the de-watered fiber of step (B) through a die heated to a temperature of at least 20° C. higher than the melting temperature of the polymer particle.7. The method of in which the dispersion has a viscosity of less than 800 mPa-s.8. The method of in which the resin is a polyolefin.9. The method of in which the dispersing agent is an ethylene/alpha-beta unsaturated carboxylic acid copolymer.10. The method of in which the dispersion comprises at least one of an additive and filler.11. The method of in which the dispersion comprises 0.1 wt % to 65.0 wt % of thermoplastic resin claim 1 , 0.25 wt % to 35 wt % of dispersing ...

Polyethylene compositions, methods of making the same, and articles prepared therefrom

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30°C, and has a coefficient of viscosity average molecular weight (CM?) less than -0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70°C to 90°C. The Mv is the viscosity average molecular weight.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

Rheology modified polyethylene compositions

A composition, comprising the reaction product of: (a) a first composition comprising a polyethylene component prepared in the presence of a chromium-based catalyst system, and (b) a second composition comprising a coupling amount of at least one polysulfonyl azide.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film thereform

The present invention relates to a polyethylene composition comprising 1) contacting, in a first gas phase fluidized bed reactor, a gaseous composition, a supported titanium magnesium catalyst precursor and co-catalyst. The HMW polymer produced is transferred to a second gas phase fluidized bed reactor together with a further gaseous composition. The resulting polymer blend product is then melted in an extruder and then passed through one or more active screens.

Rheology modified relatively high melt strength polyethlene compositions and methods of making pipes, films, sheets, and blow molded articles

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Rheology modified polyethylene compositions

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Rheology modified polyethylene compositions

Reduction of discoloration in polyolefin resins

The invention relates to a process for producing polyolefin-based pellets, where the polyolefin is prepared in the presence of a chromium catalyst system. This process comprises blending one or more additives into a polyolefin resin, and adding water to the resin, prior to pelletizing, in an amount sufficient to improve the color of the resulting pellets, and where wherein water is added in an amount from 100 ppm to 1000 ppm. The invention also relates to pellets formed by such process, and to a process of reducing color in such polyolefin-based pellets, by blending one or more additives into a polyolefin resin, and adding water to the resin, prior to pelletizing, in an amount sufficient to improve the color of the resulting pellets, and where wherein water is added in an amount from 100 ppm to 1000 ppm.

Extruder screw

Embodiments of the present disclosure include an extruder screw, (200 -1,200 -2) an extruder screw system (254) having a least one of a first extruder screw (200-1, 200-2) and at least one of a second extruder screw, (200-1, 200-2) an extruder system ( 250) having the extruder screw system (254), a continuous process for the production of an aqueous dispersion using the extruder system, and an aqueous dispersion formed by the process. For the various embodiments, the extruder screw (200-1, 200-2) includes a mixing and melting segment (266); a high internal phase emulsion segment (268) that includes a kneading block having a plurality of disks with surfaces that define a plurality of channels; a distributing and pumping segment (270); a first seal segment (272) between the mixing and melting segment (266) and the high internal phase emulsion segment (268); a second seal segment (274) between the high internal phase emulsion segment (268) and the distributing and pumping segment (270); and a third seal segment (276) at an end distal the distributing and pumping segment (270 ) relative the high internal phase emulsion segment (268).

Cellulose-based article with dispersion of higher crystallinity olefin

A cellulose-based article comprising: a cellulose-based composition; and an applied compound, wherein the applied compound, at the time of application, comprises an aqueous dispersion comprising: a higher crystallinity polyolefin; and at least one dispersing agent.

Fiber coated with a dispersion of higher crystallinity olefin

A coated fiber comprising: a compound in contact with a portion of a fiber, wherein the compound at the time of contacting comprised an aqueous dispersion comprising: i. a higher crystallinity polyolefin; and ii. at least one dispersing agent, wherein the fiber has a diameter between 5 and 35 microns; and wherein a thickness of a coating layer of the compound on the fiber ranges from about 0.1 to 10 microns.

Foam produced from a dispersion of higher crystallinity olefins

A foam produced from an aqueous dispersion comprising: at least one higher crystallinity thermoplastic; at least one dispersing agent; and water.

Method to make a long fiber concentrate with a dispersion of higher crystallinity olefin

A method to make a long fiber concentrate comprising fibers and a thermoplastic resin comprising the steps of: i. coating continuous fibers with an aqueous dispersion, wherein the dispersion comprises: a higher crystallinity polyolefin; at least one dispersing agent; to form thermoplastic coated continuous fiber strands, ii. heating the thermoplastic coated continuous fiber strands, iii. chopping the dried thermoplastic coated continuous fiber strands forming dried long fiber concentrate pellets, and iv. isolating dried long fiber concentrate pellets.

Fibrous structure impregnated with a dispersion of higher crystallinity olefin

An article formed by a process comprising: impregnating a fibrous structure with a compound, the compound comprising an aqueous dispersion, the dispersion comprising a higher crystallinity polyolefin; and at least one dispersing agent, removing at least a portion of the water from the impregnated fibrous structure.

Extruder screw

Embodiments of the present disclosure include an extruder screw, ( 200 - 1, 200 - 2 ) an extruder screw system ( 254 ) having a least one of a first extruder screw ( 200 - 1, 200 - 2 ) and at least one of a second extruder screw, ( 200 - 1, 200 - 2 ) an extruder system ( 250 ) having the extruder screw system ( 254 ), a continuous process for the production of an aqueous dispersion using the extruder system, and an aqueous dispersion formed by the process. For the various embodiments, the extruder screw ( 200 - 1, 200 - 2 ) includes a mixing and melting segment ( 266 ); a high internal phase emulsion segment ( 268 ) that includes a kneading block having a plurality of disks with surfaces that define a plurality of channels; a distributing and pumping segment ( 270 ); a first seal segment ( 272 ) between the mixing and melting segment ( 266 ) and the high internal phase emulsion segment ( 268 ); a second seal segment ( 274 ) between the high internal phase emulsion segment ( 268 ) and the distributing and pumping segment ( 270 ); and a third seal segment ( 276 ) at an end distal the distributing and pumping segment ( 270 ) relative the high internal phase emulsion segment ( 268 ).

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention includes a multimodal polyethylene composition has (1) a density of at least about 0.940 g/cm3 as measured by ASTM Method D-1505; (2) a melt flow index (I5) of from about 0.2 to about 1.5 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 5 kilograms); (3) a melt flow index ratio (I21/I5) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; (5) a bubble stability measured on specified equipment according to specified conditions for a film of about 6 X 10-6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof; the composition comprising; and (6) a dart impact on 12.5 micron (1.25 X 10-5 m) film of at least 300 g; measured according to ASTM 1709, Method A; (A) a high molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.860 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I21) of from about 0.01 to about 50 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 21.6 kilograms); and (d) a melt flow index ratio (I21/I5) of from about 6 to about 12; and (B) a low molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.900 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I2) of from about 0.5 to about 3000 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 2.16 kilograms); (d) a melt flow index ratio (I21/I5) of from about 5 to about 15; and (e) is prepared using a mole ratio of alpha olefin to ethylene of less than or equal to about 0.001:1. The invention also includes a process for producing a multimodal ethylene polymer, which process ...

Method of reducing gels in polyolefins

A process of producing a polyolefin, in one embodiment a polyethylene, and in a preferred embodiment a bimodal polyethylene including a high molecular weight component and a low molecular weight component, the process including providing a polyolefin having an I21 value of from 2 g/10 min to 100 g/10 min and a density of from 0.91 g/cm3 to 0.97 g/cm3; followed by forming a melt of the polyolefin and passing the polyolefin through one or more active screen filter(s) having a mesh size of from 70 micron to 200 micron at a mass flux of from 5 lb/hr/square inch (3,500 kg/hr/m2) to 100 lb/hr/square inch (70,000 kg/hr/m2); and isolating the polyolefin having passed through the screen filter.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film thereform

The present invention relates to a polyethylene composition comprising 1) contacting, in a first gas phase fluidized bed reactor, a gaseous composition, a supported titanium magnesium catalyst precursor and co-catalyst. The HMW polymer produced is transferred to a second gas phase fluidized bed reactor together with a further gaseous composition. The resulting polymer blend product is then melted in an extruder and then passed through one or more active screens.

Dispersions of higher crystallinity olefins

Dispersions and methods for forming dispersions that include a higher crystallinity polyolefin and at least one dispersing agent are disclosed. Various applications for use of the dispersions are also disclosed.

Rheology modified relatively high melt strength polyethylene compositions and methods of making pipes, films, sheets, and blow-molded articles

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Polyethylene compositions, methods of making the same, and articles prepared therefrom

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30° C., and has a coefficient of viscosity average molecular weight (CM?) less than −0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70° C. to 90° C. The Mv is the viscosity average molecular weight.

Polyethylene compositions, methods of making the same, and articles prepared therefrom

The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30°C, and has a coefficient of viscosity average molecular weight (CM?) less than -0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70°C to 90°C. The Mv is the viscosity average molecular weight.

Method of making a cable strength member

Strength members for cable, particularly fiber optic cable, are made by a method comprising the steps of: A. Wetting a fiber, e.g., fiberglass fiber, with an aqueous polymeric dispersion to form a wetted fiber, the dispersion comprising: 1. At least one thermoplastic resin, e.g., a polyolefin; 2. At least one dispersing agent, e.g., a ethylene ethyl acrylate polymer; and 3. Water; B. Removing the water from the wetted fiber, and C. Consolidating the resin on the fiber with or without curing.

Process for mixing polyvinyl chloride with a bio-based plasticizer

Processes for making a polyvinyl chloride (PVC) dry blend composition with a phthalate-free, bio-based plasticizer and filler, having a bulk density of greater than 0.67 g/cc and an extrusion rate of greater than 65 gm/minute for a single screw extruder of 0.75 in barrel diameter with a 25: 1 L:D general purpose polyethylene screw at 75 rotations per minute screw speed, and compositions made by the processes are provided.

Polyethylene resins for sheet and thermoforming applications

This invention relates to coupling of polyethylene resins, more specifically coupling of polyethylene resins for use in extruded profiles, especially extruded profiles for sheet extrusion and cut sheet thermoforming applications and geomembranes. The process involves conveying a HDPE resin through an extruder, wherein the extruder comprises a feed zone, a first melt zone downstream of the feed zone, a second melt zone downstream of the first melt zone, and a third melt zone downstream of the second melt zone. The resin is melted in the first zone, contacted with oxygen in the second melt zone, and contacted antioxidant in the third melt zone.

Rheology modified polyethylene compositions

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process

The instant invention provides a method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process. The method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process comprises the steps of: (1) providing a polyethylene composition having a density in the range of 0.900 g/cm3 to 0.970 g/cm3 and an relaxation spectrum index (RSI) value in the range of 10 to 100; (2) oxygen tailoring said polyethylene composition; (3) thereby forming an oxygen tailored polyethylene composition, wherein the RSI value of the said oxygen tailored polyethylene composition increases from 10% to 300% of its initial value; (4) thereby improving the bubble stability of said polyethylene composition.

Process for making tailored polyetheylene resins for sheets

This invention relates to coupling of polyethylene resins, more specifically coupling of polyethylene resins for use in extruded profiles, especially extruded profiles for sheet extrusion and cut sheet thermoforming applications and geomembranes. The process involves conveying a HDPE resin through an extruder, wherein the extruder comprises a feed zone, a first melt zone downstream of the feed zone, a second melt zone downstream of the first melt zone, and a third melt zone downstream of the second melt zone. The resin is melted in the first zone, contacted with oxygen in the second melt zone, and contacted antioxidant in the third melt zone.

Rheology modified relatively high melt strength polyethylene compositions and methods of making pipes, films, sheets, and blow molded articles

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella-thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single pack in the LTD curve is described. Compositions comprising a chromium-catalysed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

Continuous system for processing synthetic thermoplastic materials

A continuous pelletizing system for pelletizing synthetic thermoplastic materials which includes: (1) a melter/mixer for at least partially melting and mixing synthetic thermoplastic material; (2) a gear pump operatively associated with the melter/mixer for increasing pressurization of the melted synthetic thermoplastic material; (3) an independently controlled dispersive mixer operatively associated with said gear pump or the melter/mixer which provides additional independent mixing of the melted synthetic thermoplastic material; and (4) a pelletizer operatively associated with the independently controlled dispersive mixer or the gear pump for forming pellets of synthetic material.

Cellulose-based article with dispersion of higher crystallinity olefin

A cellulose-based article comprising: a cellulose-based composition; and an applied compound, wherein the applied compound, at the time of application, comprises an aqueous dispersion comprising: a higher crystallinity polyolefin; and at least one dispersing agent.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention includes a multimodal polyethylene composition has (1) a density of at least about 0.940 g/cm3 as measured by ASTM Method D-1505; (2) a melt flow index (I5) of from about 0.2 to about 1.5 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 5 kilograms); (3) a melt flow index ratio (I21/I5) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; (5) a bubble stability measured on specified equipment according to specified conditions for a film of about 6 X 10-6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof; the composition comprising; and (6) a dart impact on 12.5 micron (1.25 X 10-5 m) film of at least 300 g; measured according to ASTM 1709, Method A; (A) a high molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.860 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I21) of from about 0.01 to about 50 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 21.6 kilograms); and (d) a melt flow index ratio (I21/I5) of from about 6 to about 12; and (B) a low molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.900 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I2) of from about 0.5 to about 3000 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 2.16 kilograms); (d) a melt flow index ratio (I21/I5) of from about 5 to about 15; and (e) is prepared using a mole ratio of alpha olefin to ethylene of less than or equal to about 0.001:1. The invention also includes a process for producing a multimodal ethylene polymer, which process ...

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention includes a multimodal polyethylene composition has (1) a density of at least about 0.940 g/cm3 as measured by ASTM Method D-1505; (2) a melt flow index (I5) of from about 0.2 to about 1.5 g/10 min (as measured by ASTM D-1238, measured at 190 ~C and 5 kilograms); (3) a melt flow index ratio (I21/I5) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; (5) a bubble stability measured on specified equipment according to specified conditions for a film of about 6 X 10-6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof; the composition comprising; and (6) a dart impact on 12.5 micron (1.25 X 10-5 m) film of at least 300 g; measured according to ASTM 1709, Method A; (A) a high molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.860 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I21) of from about 0.01 to about 50 g/10 min (as measured by ASTM D-1238, measured at 190 ~C and 21.6 kilograms); and (d) a melt flow index ratio (I21/I5) of from about 6 to about 12; and (B) a low molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.900 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I2) of from about 0.5 to about 3000 g/10 min (as measured by ASTM D-1238, measured at 190 ~C and 2.16 kilograms); (d) a melt flow index ratio (I21/I5) of from about 5 to about 15; and (e) is prepared using a mole ratio of alpha olefin to ethylene of less than or equal to about 0.001:1. The invention also includes a process for producing a multimodal ethylene polymer, which process ...

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

THE PRESENT INVENTION INCLUDES A MULTIMODAL POLYETHYLENE COMPOSITION HAS (1) A DENSITY OF AT LEAST 0.940 G/CM³ AS MEASURED BY ASTM METHOD D-1505; (2) A MELT FLOW INDEX (I5 ) OF FROM 0.2 TO 1.5 G/10 MIN (AS MEASURED BY ASTM D-1238, MEASURED AT 190°C AND 5 KILOGRAMS); (3) A MELT FLOW INDEX RATIO (I21/I5) OF FROM 20 TO 50; (4) A MOLECULAR WEIGHT DISTRIBUTION,MW/MN, OF FROM 20 TO 40 ; (5) A BUBBLE STABILITY MEASURED ON SPECIFIED EQUIPMENT ACCORDING TO SPECIFIED CONDITIONS FOR A FILM OF 6 X 10-6 M THICKNESS OF AT ;EAST 1.22 M/S LINE SPEED, AT LEAST 45 KG/HR (0.013 KG/SEC ) OUTPUT RATE, OR AT LEAST 0.5 IB/HR/RPM (0.0000011 KG/S/RPS) SPECIFIC OUTPUT RATE OR A COMBINATION THEREOF; THE COMPOSITION COMPRISING; AND (6) A DART IMPACT ON 12.5 MICRON (1.25 X 10-5 M) FILM OF AT LEAST 300 G;MEASURED ACCORDING TO ASTM 1709, METHOD A; (A) A HIGH MOLECULAR WEIGHT FRACTION WHICH; (A) IS PRESENT IN AN AMOUNT OF FROM 30 TO 70 WEIGHT PERCENT (BASED ON THE TOTAL WEIGHT OF THE COMPOSITION);(B) HAS A DENSITY OF AT LEAST 0.860 G/CM³ AS MEASURED BY ASTM D-1505; (C) HAS A MELT FLOW INDEX (I21) OF FROM 0.01 TO 50 G/10 MIN ( AS MEASURED BY ASTM D-1238, MEASURED AT 190°C AND 21.6 KILOGRAMS); AND (D) A MELT FLOW INDEX RATIO (I21/I15) OF FROM 6 TO 12; AND (B) A LOW MOLECULAR WEIGHT FRACTION WHICH, (A) IS PRESENT IN AN AMOUNT OF FROM 30 TO 70 WEIGHT PERCENT (BASED ON THE TOTAL WEIGHT OF THE COMPOSITION); (B) HAS A DENSITY OF AT LEAST 0.900 G/CM3 AS MEASURED BY ASTM D-1505 ; (C) HAS A MELT FLOW INDEX (I2) OF FROM 0.5 TO 3000 G/10 MIN (AS MEASURED BY ASTM D-1238, MEASURED AT 190°C AND 2.16 KILOGRAMS); (D) A MELT FLOW INDEX RATIO (I21/I5) OF FROM 5 TO 15; AND (E) IS PREPARED USING A MOLE RATIO OF ALPHA OLEFIN TO ETHYLENE OF LESS THAN OR EQUAL TO 0.001:1. THE INVENTION ALSO INCLUDES A PROCESS FOR PRODUCING A MULTIMODAL ETHYLENE POLYMER, WHICH PROCESS COMPRISES THE FOLLOWING STEPS: (1) CONTACTING IN A FIRST GAS PHASE FLUIDIZED BED REACTOR UNDER POLYMERIZATION CONDITIONS AND AT A TEMPERATURE.

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention includes a multimodal polyethylene composition has (1) a density of at least about 0.940 g/cm3 as measured by ASTM Method D-1505; (2) a melt flow index (I5) of from about 0.2 to about 1.5 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 5 kilograms); (3) a melt flow index ratio (I21/I5) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; (5) a bubble stability measured on specified equipment according to specified conditions for a film of about 6 X 10-6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof; the composition comprising; and (6) a dart impact on 12.5 micron (1.25 X 10-5 m) film of at least 300 g; measured according to ASTM 1709, Method A; (A) a high molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.860 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I21) of from about 0.01 to about 50 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 21.6 kilograms); and (d) a melt flow index ratio (I21/I5) of from about 6 to about 12; and (B) a low molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.900 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I2) of from about 0.5 to about 3000 g/10 min (as measured by ASTM D-1238, measured at 190 °C and 2.16 kilograms); (d) a melt flow index ratio (I21/I5) of from about 5 to about 15; and (e) is prepared using a mole ratio of alpha olefin to ethylene of less than or equal to about 0.001:1. The invention also includes a process for producing a multimodal ethylene polymer, which process ...

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

The present invention includes a multimodal polyethylene composition has (1) a density of at least about 0.940 g/cm3 as measured by ASTM Method D-1505; (2) a melt flow index (I5) of from about 0.2 to about 1.5 g/10 min (as measured by ASTM D-1238, measured at 190 ~C and 5 kilograms); (3) a melt flow index ratio (I21/I5) of from about 20 to about 50; (4) a molecular weight distribution, Mw/Mn, of from about 20 to about 40; (5) a bubble stability measured on specified equipment according to specified conditions for a film of about 6 X 10-6 m thickness of at least about 1.22 m/s line speed, at least about 45 kg/hr (0.013 kg/sec) output rate, or at least about 0.5 lb/hr/rpm (0.0000011 kg/s/rps) specific output rate or a combination thereof; the composition comprising; and (6) a dart impact on 12.5 micron (1.25 X 10-5 m) film of at least 300 g; measured according to ASTM 1709, Method A; (A) a high molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.860 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I21) of from about 0.01 to about 50 g/10 min (as measured by ASTM D-1238, measured at 190 ~C and 21.6 kilograms); and (d) a melt flow index ratio (I21/I5) of from about 6 to about 12; and (B) a low molecular weight fraction which; (a) is present in an amount of from about 30 to about 70 weight percent (based on the total weight of the composition); (b) has a density of at least about 0.900 g/cm3 as measured by ASTM D-1505; (c) has a melt flow index (I2) of from about 0.5 to about 3000 g/10 min (as measured by ASTM D-1238, measured at 190 ~C and 2.16 kilograms); (d) a melt flow index ratio (I21/I5) of from about 5 to about 15; and (e) is prepared using a mole ratio of alpha olefin to ethylene of less than or equal to about 0.001:1. The invention also includes a process for producing a multimodal ethylene polymer, which process ...

Polymer composition and process to manufacture high molecular weight-high density polyethylene and film therefrom

“composition suitable for tubes, composition suitable for blown films, composition suitable for blow molded articles, tube, film, blow molded article and method for improving the creep flow behavior of a resin”

composição de polietileno de reologia modificada, artigo moldado por sopro, tubo, pelicula, folha e método para melhorar o comportamento de fluxo de fluência de uma resina. uma composição polimérica compreende um componente de polimero de etileno de baixo peso molecular (bpm) e um componente de polímero de etileno de alto peso molecular (apm) acoplados com uma polisulfonil azida. preferivelmente, o componente de polietileno de bpm e o componente de polietileno de apm se co-cristalizam na composição tal que ela exiba um único ou substancialmente único pico em uma curva de distribuição de espessuras de lamelas (ltd). o polimero de etileno para os componentes de polietileno de bpm e apm podem ser ou homopolímero ou copolímero de etileno. preferivelmente, ambos os componentes são um copolímero de etileno de mesma, ou diferente, composição (isto é, com os mesmos ou diferentes comonâmeros) . um método para produzir um tubo que inclui selecionar uma composição polimérica tendo substancialmente um único pico na curva ltd é descrito. composições compreendendo um polímero de etileno catalisado com cromo acopladas com uma polisulfonil azida também são descritas aqui. modified rheology polyethylene composition, blow molded article, tube, film, sheet and method for improving the creep flow behavior of a resin. A polymer composition comprises a low molecular weight ethylene polymer (bpm) component and a high molecular weight ethylene polymer (apm) component coupled with a polysulfonyl azide. preferably, the bpm polyethylene component and the apm polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak on a lamella thickness distribution curve (ltd). the ethylene polymer for the bpm and apm polyethylene components may be either ethylene homopolymer or copolymer. preferably both components are an ethylene copolymer of the same or different composition (i.e. the same or different comonomers). A method for producing a tube ...

RHEOLOGY-MODIFIED POLYETHYLENE COMPOSITIONS

POLYETHYLENE COMPOSITIONS WITH MODIFIED REOLOGY.

Una composición adecuada para tuberías, que comprende el producto de reacción de: (a)una primera composición que comprende un componente de polietileno de BPM y un componente de polietileno de APM y (b)una segunda composición que comprende una cantidad de acoplamiento de al menos una polisulfonil azida, siendo la cantidad de acoplamiento al menos 0,0025 de porcentaje en peso, basado en el peso del polímero total y en la que la primera composición presenta sustancialmente un solo pico en una curva LTD, en la que la composición presenta un valor de PENT mayor que 1.000 horas a 80ºC y a una tensión aplicada de 2,4 MPa (ASTM D-1473-97), en la que el componente de APM presenta un caudal de masa fundida I2 (190ºC, 2,16 kg en peso, ASTM D-1238-03) de 0,001 a 1,0 g/10 min, en la que el componente de BPM presenta un caudal de masa fundida I2 de 40 a

Rheology modified polyethylene compositions.

Una composicion polimerica comprende un componente de polimero de etileno de bajo peso molecular (LMW) y un componente de polimero de etileno de alto peso molecular (HMW) acoplado con una polisulfonil-azida. De preferencia, el componente de polietileno de bajo peso molecular y el componente de polietileno de alto peso molecular se co-cristalizan en la composicion, de tal manera que exhibe un solo o sustancialmente un solo pico en una curva de distribucion de espesor lamelar (LTD). El polimero de etileno para los componente de polietileno de bajo peso molecular y de alto peso molecular puede ser un homopolimero o bien un copolimero de etileno. De preferencia, ambos componentes son un copolimero de etileno de la misma o diferente composicion (es decir, con los mismos o diferentes comonomeros). Se describe un metodo para hacer un tubo que incluye seleccionar una composicion polimerica que tiene sustancialmente un solo pico en la curva de distribucion de espesor lamelar. Tambien se describen en la presente composiciones que comprenden un polimero de etileno catalizado con cromo, acoplado con una polisulfonil-azida.

Rheology modified relatively high melt strength polyethelene compositions and methods of making pipes, films, sheets and blow molded articles

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition ( that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein. Figure 1 as the most illustrative drawing to accompany the abstract.

Rheology-modified polyethylene blends with relatively high melt strength and methods for making tubes, films, plates and mold blasted articles

En polymerblanding omfatter en etylenpolymerkomponent med lav molekylvekt (LMW) og en etylenpolymerkomponent med høy molekylvekt (HMW) koblet med et polysulfonylazid. Fortrinnsvis ko-krystalliserer LMW polyetylenkomponenten og HMW polyetylenkomponenten i blandingen slik at det vises en enkel eller hovedsakelig enkel topp i en lamellær tykkelsesfordelings(LTD)kurve. Etylenpolymeren for LMW og HMW polyetylenkomponentene kan enten være homopolymer eller etylen kopolymer. Fortrinnsvis er begge komponentene en etylen kopolymer av samme eller forskjellig sammensetning (som betyr; med samme eller forskjellige komonomerer). En fremgangsmåte for fremstilling av et rør som omfatter å velge en polymerblanding som har en hovedsakelig enkel topp i LTD-kurven er beskrevet. Blandinger omfattende en kromkatalysert etylenpolymer, koblet med et polysulfonylazid er også beskrevet her.

Rheology modified polyethylene compositions

Rheology modified polyethylene compositions

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Rheology modified relatively high melt strength polyethlene compositions and methods of making pipes, films, sheets, and blow molded articles

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Rheology modified polyethylene compositions

Rheology modified polyethylene compositions

A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component coupled with a polysulfonyl azide. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (LTD) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolymer or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same, or different, composition (that is, with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described. Compositions comprising a chromium-catalyzed ethylene polymer, coupled with a polysulfonyl azide are also described herein.

Polyethylene resins for sheet and thermoforming applications

This invention relates to coupling of polyethylene resins, more specifically coupling of polyethylene resins for use in extruded profiles, especially extruded profiles for sheet extrusion and cut sheet thermoforming applications and geomembranes. The process involves conveying a HDPE resin through an extruder, wherein the extruder comprises a feed zone, a first melt zone downstream of the feed zone, a second melt zone downstream of the first melt zone, and a third melt zone downstream of the second melt zone. The resin is melted in the first zone, contacted with oxygen in the second melt zone, and contacted antioxidant in the third melt zone.

Fiber coated with a dispersion of higher crystallinity olefin

A coated fiber comprising: a compound in contact with a portion of a fiber, wherein the compound at the time of contacting comprised an aqueous dispersion comprising: i. a higher crystallinity polyolefin; and ii. at least one dispersing agent, wherein the fiber has a diameter between 5 and 35 microns; and wherein a thickness of a coating layer of the compound on the fiber ranges from about 0.1 to 10 microns.

Method to make a long fiber concentrate with a dispersion of higher crystallinity olefin

A method to make a long fiber concentrate comprising fibers and a thermoplastic resin comprising the steps of: i. coating continuous fibers with an aqueous dispersion, wherein the dispersion comprises: a higher crystallinity polyolefin; at least one dispersing agent; to form thermoplastic coated continuous fiber strands, ii. heating the thermoplastic coated continuous fiber strands, iii. chopping the dried thermoplastic coated continuous fiber strands forming dried long fiber concentrate pellets, and iv. isolating dried long fiber concentrate pellets.

Method of making a cable strength member

Strength members for cable, particularly fiber optic cable, are made by a method comprising the steps of: A. Wetting a fiber, e.g., fiberglass fiber, with an aqueous polymeric dispersion to form a wetted fiber, the dispersion comprising: 1. At least one thermoplastic resin, e.g., a polyolefin; 2. At least one dispersing agent, e.g., a ethylene ethyl acrylate polymer; and 3. Water; B. Removing the water from the wetted fiber, and C. Consolidating the resin on the fiber with or without curing.

Dispersions of higher crystallinity olefins

Dispersions and methods for forming dispersions that include a higher crystallinity polyolefin and at least one dispersing agent are disclosed. Various applications for use of the dispersions are also disclosed.

Dispersions of higher crystallinity olefins

Fibrous structure impregnated with a dispersion of higher crystallinity olefin

An article formed by a process comprising: impregnating a fibrous structure with a compound, the compound comprising an aqueous dispersion, the dispersion comprising a higher crystallinity polyolefin; and at least one dispersing agent, removing at least a portion of the water from the impregnated fibrous structure.

Foam produced from a dispersion of higher crystallinity olefins

A foam produced from an aqueous dispersion comprising: at least one higher crystallinity thermoplastic; at least one dispersing agent; and water.

Device and method comprising a retractable mixing element

Disclosed is a device for processing materials comprising a mixing chamber (11) having a valve (16) for removal of the material from the mixing chamber and a piston (12) which fits within the mixing chamber in a manner such that the piston can be moved to remove substantially all material from the mixing chamber via the valve; at least one, preferably at least two, retractable mixing element (s) (13) wherein each of such elements is movable in and out of the mixing chamber through a port wherein the element and port are configured such that during mixing and when the element is withdrawn from the mixing chamber substantially no material is removed from the mixing chamber via the port. Provided is also a method of using such a device and a system comprising use of such devices in an automated or partially automated array. High throughput screening methodologies are useful for rapid assessments of many material combinations.

Apparatus and method comprising a retractable mixing element

method for improving the bubble stability of a polyethylene composition suitable for expanded film extrusion process

método para melhorar a estabilidade de bolha de uma composição de polietileno apropriada para processo de extrusão de película expandida a presente invenção provê um método para melhorar a estabilidade de uma composição de polietileno apropriada para processo de extrusão de película expandida. o método para melhorar a estabilidade de uma composição de polietileno apropriada para processo de extrusão de película expandida compreende as etapas de: (1) prover uma composição de polietileno tendo uma densidade na faixa de 0,900g/cm3 a 0,970 g/cm3 e um valor de índice de espectro de relaxação (rsi) de 10 a 100; (2) dimensionar oxigênio necessário e suficiente para a dita composição de polietileno; (3) formar dessa maneira uma composição de polietileno oxigenado, na qual o valor de rsi da dita composição de polietileno oxigenado aumenta de 10% a 300% de seu valor inicial; (4) melhorar dessa maneira a estabilidade de bolha da dita composição de polietileno.

Process for mixing polyvinyl chloride with a bio-based plasticizer.

Se proporcionan los procesos para elaborar una composición de mezcla seca de cloruro de polivinilo (PVC) con un plastificador libre de ftalato de base biológica y un material de relleno, que tiene una densidad de volumen de más de 0.67 g/cc y un índice de extrusión de más de 65 mm/minuto para un extrusor de tornillo único de un diámetro de barril de 0.75 pulgadas con un tornillo de polietileno de propósito general de 25: 1 L:D a una velocidad de 75 rotaciones por minuto de tornillo, y las composiciones elaboradas mediante los procesos.

method for improving bubble stability of a polyethylene composition suitable for expanded film extrusion process

process of producing a polyethylene

PROCESSO DE PRODUçãO DE UM POLIETILENO A presente invenção refere-se a um processo de produção de uma poliolefina, em uma modalidade um polietileno, e em uma modalidade preferida um polietileno bimodal incluindo um componente de alto peso molecular e um componente de baixo peso molecular, o processo incluindo provimento de uma poliolefina tendo um valor I~ 21~ de 2 gIlO minutos a 100 g/10 minutos e uma densidade de 0,91 g/cm3 a 0,97 glcm3; seguido por formação de uma fusão da poliolefina e passando a poliolefina através de um ou mais filtros de tela tendo um tamanho de tela de 70 micra a 200 micra em um fluxo de massa de 3500 kg/h/m2 (5 lb/h/polegada quadrada) a 70 000 kg/h/m2 (100 lb/h/polegada quadrada); e isolando a poliolefina tendo passado através do filtro de tela. PROCESS FOR THE PRODUCTION OF A POLYETHYLENE The present invention relates to a process for the production of a polyolefin, in one embodiment a polyethylene, and in a preferred embodiment a bimodal polyethylene including a high molecular weight component and a low molecular weight component, the process including providing a polyolefin having an I ~ 21 ~ value of 2 gI10 minutes at 100 g / 10 minutes and a density of 0.91 g / cm3 to 0.97 glcm3; followed by the formation of a fusion of the polyolefin and passing the polyolefin through one or more screen filters having a screen size of 70 microns to 200 microns in a mass flow of 3500 kg / h / m2 (5 lb / h / inch) square) to 70,000 kg / h / m2 (100 lb / h / square inch); and isolating the polyolefin having passed through the screen filter.

Process for mixing polyvinyl chloride with a bio-based plasticizer

Processes for making a polyvinyl chloride (PVC) dry blend composition with a phthalate-free, bio-based plasticizer and filler, having a bulk density of greater than 0.67 g/cc and an extrusion rate of greater than 65 gm/minute for a single screw extruder of 0.75 in barrel diameter with a 25: 1 L:D general purpose polyethylene screw at 75 rotations per minute screw speed, and compositions made by the processes are provided.

A method to increase production rate of a continuous mixer or extruder

Compounding or extrusion rates can be increased by splitting the polymer solid feed. Melting of additional solid polymer is significantly assisted by excess enthalpy from incoming melt from a primary mixing stage. Depending on resin rheology and melting characteristics, rate increases were achieved of from up to about 55 to about 100% rate increase over the use of a single feed at the same rotor speed. The net result is a decrease in the overall SEI (specific energy input to the polymer) and thus melt temperatures.

Process for mixing polyvinyl chloride with a bio-based plasticizer

Processes for making a polyvinyl chloride (PVC) dry blend composition with a phthalate-free, bio-based plasticizer and filler, having a bulk density of greater than 0.67 g/cc and an extrusion rate of greater than 65 gm/minute for a single screw extruder of 0.75 in barrel diameter with a 25: 1 L:D general purpose polyethylene screw at 75 rotations per minute screw speed, and compositions made by the processes are provided.

Method of making a cable strength member

A method to increase production rate of a continuous mixer or extruder

Process for mixing polyvinyl chloride with a bio-based plasticizer.

Se proporcionan los procesos para elaborar una composición de mezcla seca de cloruro de polivinilo (PVC) con un plastificador libre de ftalato de base biológica y un material de relleno, que tiene una densidad de volumen de más de 0.67 g/cc y un índice de extrusión de más de 65 mm/minuto para un extrusor de tornillo único de un diámetro de barril de 0.75 pulgadas con un tornillo de polietileno de propósito general de 25: 1 L:D a una velocidad de 75 rotaciones por minuto de tornillo, y las composiciones elaboradas mediante los procesos.

Rheologiemodifizierte polyethylenzusammensetzungen