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8124707 |
Process for the production of a polymer comprising monomeric units of ethylene, an A-olefin and a vinyl norbornene
The invention relates to a process for the preparation of a polymer comprising monomeric units of ethylene, an α-olefin and a vinyl norbornene applying as a catalyst system: a. a bridged or an ...
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8048976 |
Polyfarnesenes
Provided herein are polyfarnesenes such as farnesene homopolymers derived from a farnesene and farnesene interpolymers derived from a farnesene and at least a vinyl monomer; and the processes of...
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8039565 |
Catalytic system for obtaining conjugated diene/mono-olefin copolymers and these copolymers
A catalytic system usable for the copolymerization of at least one conjugated diene and at least one monoolefin, a process for preparing this catalytic system, a process for preparing a copolymer...
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8013093 |
Articles comprising propylene-based elastomers
The present invention is directed generally to the use of propylene-based elastomers in articles. The propylene-based elastomers have isotactic polypropylene crystallinity, a melting point by DSC...
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7964688 |
Chelating compound, and method of use of, poly(1-octadecyl-butanedioate) and the corresponding acid, poly(1-octadecyl-butanedioic acid)
A Chelating agent comprising a polymer backbone. The polymer backbone has a plurality of carbon atoms. There are two carboxylate groups or carboxylic acid groups per repeating unit being coupled to...
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7868115 |
Farnesene interpolymer
Provided herein are farnesene interpolymers derived from a farnesene and at least one vinyl monomer. In certain embodiments, the farnesene is α-farnesene, β-farnesene or a combination thereof. In s...
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7868114 |
Compositions comprising a farnesene interpolymer
Provided herein are composition comprising a farnesene interpolymer. The farnesene interpolymer can be derived from a farnesene and at least one vinyl monomer. In some embodiments, the mole percent...
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7851577 |
Polymerization process using zinc halide initiators
A cationic polymerization process for isoolefins using a zinc halide initiator. The zinc halide initiator is added to a solution of the isoolefin in a suitable solvent, preferably a halocarbon...
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7829645 |
Process for the production of a polymer comprising monomeric units of ethylene, an α-oplefin and a vinyl norbornene
The invention relates to a process for the preparation of a polymer comprising monomeric units of ethylene, an α-olefin and a vinyl norbornene applying as a catalyst system: a. a bridged or an ...
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7790822 |
Hyperbranched maleic anhydride-diene polymers
A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic...
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7776976 |
Method for synthesis of butyl rubber
This invention puts forward a process of preparing butyl rubber. High gravity devices are used as polymerization reactor. The mixture of isomonoolefin and conjugated diolefin monomers and the...
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7763675 |
Nucleated polypropylene nanocomposites
nuc-PP nanocomposite is made from the mixing of nuc-PP with olefin elastomer and organoclay, and optionally, a dispersion agent. Unexpectedly, processing properties such as higher melt flow, and...
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7728085 |
Process for producing ethylene- α -olefin-polyene random copolymer
The present invention provides a process for producing an ethylene-α-olefin-unconjugated polyene random copolymer in an aliphatic hydrocarbon solvent under conditions of high-temperature and ...
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7728091 |
Polymerization of phosphaalkenes
Methods for polymerization of phosphaalkenes using initiators are provided. Also provided are polymers and co-polymers in which the polymer backbone contains tracts of carbon and phosphorous atoms...
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7659355 |
Elastomeric compositions, air barriers, and processes for the making the same
The invention relates to novel air barriers made from elastomeric compositions. In particular, the invention relates to novel air barriers such as innerliners, air sleeves, and innertubes made from...
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7650930 |
High temperature process for solution polymerization
A process for the solution polymerization of olefins with improved on-stream time is provided. The solution polymerization process of the current invention comprises a method for the on-line...
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7605217 |
High strength propylene-based elastomers and uses thereof
The present invention provides a crosslinked propylene-based elastomer having an isotactic propylene triad tacticity of from 65 to 95%, a melting point by DSC equal to or less than 110° C., a heat ...
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7582715 |
Polymers substantially free of long chain branching
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In...
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7579403 |
Stain resist comprising hyperbranched maleic anhydride-diene polymers
Stain resistant composition comprises a hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene...
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7579420 |
Hyperbranched maleic anhydride-diene polymers
A hyperbranched polymer having pendent olefinic groups and comprising polymer units derived from one or more terminally-unsaturated, acyclic aliphatic diene and polymer units derived from maleic...
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7541412 |
Process for preparation of polyolefins via degenerative transfer polymerization
Disclosed is a method of producing a polyolefin composition comprising contacting a metallocene pre-catalyst with a substoichiometric amount of a co-catalyst; adding a first olefin monomer; and...
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7531605 |
Process for producing polyolefin resin composition and polypropylene composition
A process for producing a polyolefin-based resin composition comprises, in the first polymerization stage, polymerizing an α-olefin having 4 to 20 carbon atoms, a styrene or a cyclic olefin in the ...
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7521518 |
Ethylene copolymer compositions
Disclosed is a novel ethylene copolymer by copolymerizing an ethylene and at least one comonomer selected from a compound represented by the formula H2C═CHR wherein R is an alkyl group or an aryl g...
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7514386 |
Chlorinated promoters for vanadium-based polymerization catalysts
Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM)...
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7511106 |
Ethylene elastomer compositions
This disclosure relates to olefin polymerization processes for polymerizing ethylene, higher alpha-olefin comonomer and at least one diene, especially vinyl norbornene (VNB), and especially...
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7446151 |
Process for production of high-isoprene butyl rubber
The present invention relates to a continuous process for producing polymers at conversions ranging from 50% to 95% having a Mooney viscosity of at least 25 Mooney-units and a gel content of less...
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7423100 |
Polymerization processes
The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons.
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7390866 |
Propylene-based elastomers and uses thereof
The present invention provides curable and cured propylene-based elastomers, optionally including a diene, and having isotactic polypropylene crystallinity, a melting point by DSC equal to or less...
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7339018 |
Diene-modified propylene copolymers
Certain specific embodiments of the invention will now be discussed. For example, a process of preparing a copolymer composition that includes a diene-modified polypropylene copolymer is described,...
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7332555 |
Polymers with new sequence distributions
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the...
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7282548 |
Process for production of high-isoprene butyl rubber
The present invention relates to a continuous process for producing polymers at conversions ranging from 50% to 95% having a Mooney viscosity of at least 25 Mooney-units and a gel content of less...
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7238819 |
Process for preparing isobutylene-based polymers
This invention relates to a metal organic compound, a catalytic composition comprising said metal organic compound, a process for homo- or co-polymerizing isoolefines in the presence of said metal...
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7230059 |
Process for producing olefin copolymer
A process for producing an olefin-based copolymer, which comprises copolymerizing at least one olefin selected from the group consisting of ethylene and straight chain α-olefins, and a vinyl ...
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7223828 |
Branched diene-modified crystalline polypropylene terpolymers
Certain specific embodiments of the invention will now be discussed. For example, a process of preparing a polymer composition that includes a branched crystalline diene-modified polypropylene...
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7202317 |
Polymerization of i-butene in hydrocarbon media using bis(borane) co-initiators
A method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in the presence of water. More specifically, a method is provided for cationically polymerizing olefin...
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7196149 |
Polymerization of i-butane in hydrocarbon media using bis(borane) co-initiators
A method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase. More specifically, a...
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7193024 |
Alpha-Olefin based branched polymer
A polymer comprising units (1) derived from an alpha-olefin having at least 3 carbon atoms (1′), units (2) derived from divinylbenzene or C1-10hydrocarbyl substituted derivatives thereof (2′), and...
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7169870 |
Method for preparing butadiene/isoprene copolymers and resulting copolymers
The present invention relates to a process for the preparation random copolymers of butadiene and isoprene, essentially consisting of reacting a catalytic system in the presence of butadiene and...
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7163993 |
Electrical devices from polymer resins prepared with ionic catalysts
This invention relates to olefin polymers particularly suited to satisfying the dielectric properties required in electrical device use. The olefin polymers can be prepared by contacting...
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7119157 |
Methods of preparing EP(D)M elastomer, of controlling yield thereof, and of recovering the same
Disclosed herein is a method of preparing an EP(D)M elastomer, which includes pre-cooling a reactive solvent to −80 to −100° C.; and polymerizing ethylene, at least one higher α-olefin having 3 to ...
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7101936 |
Olefin polymerization process to produce branched polymer compositions
A method of lowering MFR response of a high-melt-flow-rate-polymer-producing metallocene catalyst is provided. The method includes contacting the metallocene catalyst with a sufficient quantity of...
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7094854 |
Ethylene/butadiene copolymers, catalytic system and process for the synthesis thereof
Disclosed are ethylene and butadiene copolymers and a catalytic system usable for the synthesis of these copolymers. The copolymers have a molar content of units resulting from butadiene of ≧8%, s...
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7041760 |
Process for production of butyl rubber
The present invention relates to a process for producing polymers containing repeating units derived from at least one isoolefin monomer, optionally repeating units derived from at least one...
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7022793 |
Process for the treatment of polymer compositions
A process for the preparation of heterophasic elastomeric polymer comprising the step of polymerizing ethylene, an alpha-olefin CH2═CHL, where L is an alkyl, cycloalkyl or aryl radical with 1...
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7022789 |
Telechelic alkadiene polymers with crosslinkable end groups and methods for making the same
The present invention relates to telechelic polymers having crosslinkable end groups of the formula and methods for preparing the same wherein n is an integer; is an alkadienyl group; Y is an alkyl...
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7005491 |
Propylene diene copolymerized polymers
A method of lowering MFR response of a high melt flow rate polymer producing metallocene catalyst is provided. The method includes contacting the metallocene catalyst with a sufficient quantity of...
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6995228 |
Copolymer of conjugated cyclodiene
A cyclic conjugated diene copolymer comprising a main chain comprised of (A) cyclic conjugated diene monomer units, (B) monomer units obtained from vinyl aromatic monomers each having a hydrogen...
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6977287 |
Propylene diene copolymers
The co-polymerization reaction of one or more olefin monomers, such as propylene, with α,ω-diene units and the resulting copolymers are provided. More specifically, the copolymer may have from 90 t...
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6974851 |
Halogen- and sulfur-free shaped articles containing peroxide curable compounds of butyl rubber
The present invention relates to a shaped article for high purity applications containing at least one peroxide curable compound containing a substantially gel-free butyl polymer. In another of its...
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6933359 |
Copolymerization of ethylene and dienes
Ethylene, dienes and optionally α-olefins are copolymerized by selected iron complexes of 2,6-pyridinecarbox-aldehydebis(imines) and 2,6-diacylpyridinebis(imines). The resulting copolymers contain ...
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