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7619051 |
Butene-1/ethylene copolymer
A 1-butene/ethylene copolymer having a content of ethylene derived units from 0.1% to 5% by weight in which an ethylene content in the polymer (C 2 ) and a melting point of the polymer (Tm) meet...
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7619033 |
Process for preparing an aqueous dispersion of a quaternary ammonium salt containing vinyl copolymer
A method of making an ion triggerable cationic polymer by solution copolymerizing one or more vinyl-functional cationic monomers, one or more water insoluble or hydrophobic vinyl monomers with...
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7615602 |
Process for producing polypropylene film
The invention relates to a process for producing a polypropylene film having a small dynamic coefficient of friction (CoF) and to a film obtained by this process. The invention further relates to...
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7615598 |
Method for manufacturing high viscosity polyalphaolefins using ionic liquid catalysts
A method of continuously manufacturing a high viscosity polyalphaolefin product by introducing a monomer and an ionic liquid catalyst together into a reaction zone while simultaneously withdrawing...
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7615597 |
Process for the copolymerization of ethylene
A process for producing a polymer of ethylene containing from 0.1 to 99% by mol of one or more derived units of alpha-olefins and optionally from 0 to 5% by mol polyene, comprising contacting...
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7615596 |
Multiple component feed methods and systems
Multiple components are selected, conveyed, and measured in a polymerization system. A control system adjusts the system variables to the desired values. Portions of the components can be fed to a...
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7608675 |
Ethylene/methyl acrylate/cure site copolymers and compounds and vulcanizates thereof
Disclosed are copolymers derived from copolymerization of from about 50 to about 70 weight % of methyl acrylate; from about 0.5 to about 5 weight % of 1,4-butene-dioic acid moieties, or anhydrides...
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7608658 |
Amine-functionalized liquid polyisoprene
This invention discloses a process for manufacturing an elastomeric article by liquid injection molding, said process comprising the steps of: (I) heating a curable composition comprised of (1) a...
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7605215 |
Process for producing olefin copolymerization catalyst and process for producing olefin copolymer
A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a...
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7601787 |
Ethylene polymerization process
A process for polymerizing ethylene is disclosed. The polymerization is performed in the presence of a Ziegler-Natta catalyst system in two slurry reaction zones. Most of the polyethylene (70-95...
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7601409 |
Stretch film
Stretch films are disclosed, the films having at least one layer formed of or including a polyethylene copolymer and having a natural draw ratio of at least 250%, a tensile stress at the natural...
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7598333 |
Low-viscosity drag reducer
Low-viscosity drag reducers, systems for delivering low-viscosity drag reducers, and methods of making low-viscosity drag reducers are disclosed. The low-viscosity drag reducers have a viscosity...
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7598329 |
Process for manufacturing ultra high molecular weight polymers using novel bridged metallocene catalysts
The present invention relates to a process for manufacturing ultra high molecular weight polymers by means of polymerization and co-polymerization of olefins using novel bridged metallocene...
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7598328 |
Supported catalysts for manufacture of polymers
A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising:
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7598327 |
Method for polymerizing olefins in a gas phase reactor using a seedbed during start-up
A method of starting up a gas phase polymerization reactor, comprising controlling an amount of hydrocarbon absorbed in a polymer seedbed during startup to avoid formation of agglomerates or...
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7595371 |
Ethylene-α-olefin copolymer and food packaging material
An ethylene-α-olefin copolymer comprising repeating units derived from ethylene and repeating units derived from an α-olefin having 3 to 20 carbon atoms and having a melt flow rate (MFR) of from...
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7595368 |
Nanofilm compositions with polymeric components
Nanoflims useful for filtration are prepared from amphiphilic species and one or more polymeric components. The amphiphilic species or components may be oriented on an interface or surface. A...
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7595103 |
Pipe systems of polypropylene compositions
Polypropylene pipes (parts by weight): 1) 100 parts of a crystalline random copolymer of propylene with 1-15% by weight of a C 4 -C 10 α-olefin or a crystalline random copolymer of propylene with...
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7592411 |
Synthetic lubricant composition and process
A liquid polymer suitable for use as a lubricant base oil is produced by polymerizing ethylene and at least one alpha-olefin using a metallocene catalyst to provide a polymer which is then...
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7592410 |
Polyethylene resin with narrow particle size distribution
The present invention relates to a polyethylene resin comprising A) a first ethylene homo- or copolymer fraction, and B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a...
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7592409 |
Styrene acrylonitrile isoprene triblock copolymer
The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a...
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7592391 |
Process for preparing an aqueous dispersion of a quaternary ammonium salt containing vinyl copolymer
A method of making an ion triggerable cationic polymer by solution copolymerizing one or more vinyl-functional cationic monomers, one or more water insoluble or hydrophobic vinyl monomers with...
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7589162 |
Polyethylene compositions and pipe made from same
A polymer composition comprising a density equal to or greater than about 0.947 g/cc, a high load melt index from about 1 g/10 min to about 30 g/10 min, and a tensile natural draw ratio less than...
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7589161 |
Polymeric quenchant, manufacture thereof, and method for quenching steel
A polymeric quenchant. The polymeric quenchant comprises an inorganic nanoparticle, a water-soluble polymer, and water, wherein a weight ratio of the inorganic nanoparticle, water-soluble polymer...
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7589160 |
Process for preparing 1-butene polymers
A process for obtaining 1-butene polymers comprising the step of contacting under polymerization conditions 1-butene and optionally ethylene, propylene or said alpha-olefin, in the presence of a...
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7589145 |
Syndiotactic rich polyolefins
Disclosed herein is a polymer comprising an amorphous syndiotactic rich polyolefin comprising greater than about 50 wt % C 3 -C 40 alpha olefins and having about 50% to less than about 80% r...
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7589042 |
Arylphenoxy catalyst system for producing ethylene homopolymer or copolymers of ethylene and α-olefins
Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and α-olefins, and a method of producing an ethylene homopolymer or copolymers of...
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7582716 |
Compositions of ethylene/α-olefin multi-block interpolymer for blown films with high hot tack
The present invention relates to film layers and compositions having improved hot tack properties. The compositions comprise at least one ethylene/α-olefin interpolymer, wherein the...
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7582712 |
Alpha-olefins polymerization catalyst
Methods and apparatus to form a catalyst precursor, comprising combining in a reactor magnesium, an alkoxysilane compound, a halogenized silicon compound, a halogenized transition metal compound, a...
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7582710 |
Degassing process
An improved process for the polymerization of olefin monomer selected from (a) ethylene, (b) propylene, (c) mixtures of ethylene and propylene and (d) mixtures of (a), (b) or (c) with one or more...
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7579423 |
Process for polymerizing 1-butene
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH 2 ═CHT wherein T is a C 3 -C 10 , alkyl group, in the presence of a...
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7579422 |
Propylene random copolymer and process for the production thereof
The present invention relates to a process for preparing a propylene random copolymer comprising polymerization of propylene with a comonomer, said comonomer being ethylene or an α-olefin...
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7579417 |
Metallocene compounds
A metallocene compound of formula (I) wherein: M is an atom of a transition metal; X, same or different, is a hydrogen atom, a halogen atom, or a R, OR, OSO 2 CF 3 , OCOR, SR, NR 2 or PR 2 group,...
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7579409 |
Polyetrafluoroethylene micropowder compositions
A micropowder composition containing a granular PTFE micropowder, a fine powder PTFE micropowder, and a fine powder molding resin provides mixtures with fluoroelastomers containing copolymerized...
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7576166 |
Process for the production of linear low-density polyethylene composition
A process for producing bimodal linear low-density polyethylene polymer compositions, useful for making films. The polymer compositions have a melt flow rate MFR 2 of 0.4 to 1.0 g/10 min and a...
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7576164 |
Curable base-resistant fluoroelastomers
Compositions of fluoroelastomers containing copolymerized units of tetrafluoroethylene, propylene, a first cure site selected from the group consisting of i) trifluoroethylene, ii)...
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7572875 |
Ethylene homopolymers or copolymers having good machine direction (MD) elmendorf tear strength
This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum...
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7572874 |
Processes based on atom (or group) transfer radical polymerization and novel (co)polymers having useful structures and properties
Improved processes for atom (or group) transfer radical polymerization (ATRP) and novel polymers have been developed and are described. In certain embodiments, novel copolymers comprising a least...
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7569651 |
Transition metal compound, ligand system, catalyst system and its use for the polymerization and copolymerization of olefins
A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems...
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7569648 |
Process for the copolymerization of ethylene
A process for producing a polymer of ethylene containing from 0.1 to 50% by weight of one or more derived units of alpha-olefins fo formula CH 2 ═CHR, wherein R is a C 2 -C 20 alkyl radical,...
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7569647 |
Process for the copolymerization of ethylene
A process for producing a copolymer of ethylene containing from 0.1 to 99% by mol of one or more derived units of alpha-olefins of formula CH 2 ═CHA, wherein A is a C 2 -C 20 alkyl radical,...
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7569620 |
High modulus crosslinked polyethylene with reduced residual free radical concentration prepared below the melt
The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of...
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7566761 |
Olefin polymer and process for preparing the same
The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the...
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7566760 |
Preparation of aqueous polymer dispersions
The invention relates to a method for the production of aqueous polymer dispersions, by the polymerisation of one or more olefins in aqueous media in the presence of dispersing agents and...
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7563836 |
Polypropylene composition for air quenched blown films
The invention is directed to a polypropylene resin, which is suitable for manufacturing an air quenched blown film. The resin has a melt flow rate of greater than 5 g/10 min, less than 2% xylene...
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7560523 |
Production of isotactic and regiorandom polypropylene based polymer and block copolymers
One step ortho-alkylation of anilines with styrenes to give chiral anilines is obtained using a strong acid catalyst, e.g. CF 3 SO 3 H. Condensation of the product to give ligand and metallation...
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7560521 |
Components and catalysts for the polymerization of olefins
A catalyst component for the polymerization of olefins comprising a titanium compound, a Mg-dihalide, a difunctional electron donor compound (ED) selected from diesters, diketones, diamines or...
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7557172 |
Ethylene-alpha-olefin copolymer
An ethylene-α-olefin copolymer comprising a repeating unit derived from ethylene and a repeating unit derived from an α-olefin having 3 to 20 carbon atoms, wherein a melt flow rate (MFR) is 0.01...
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7557170 |
Method for reducing depositions in polymerization vessels
The method of polymerization includes the steps of a) providing a catalyst system, b) providing at least one monomer or comonomer mixture in a reaction vessel, c) introducing the catalyst into the...
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7553896 |
Ortho-nitrosophenols as polymerization inhibitors
Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one nitroso...
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