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| Number | Title | Issue Date |
| 7847042 | Slurry polymerisation process of ethylene in the presence of low amount of scavenger The invention discloses a metallocene catalysed slurry polymerisation process of ethylene in the presence of a low concentration of scavenger. This allows improving the anti-sheeting of the reactor during the polymerisation process. ... | 12/07/2010 |
| 7425601 | 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 invention relates to copolymers of an isoolefin, preferably isobutylene,... | 09/16/2008 |
| 7423100 | Polymerization processes The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons. ... | 09/09/2008 |
| 7414101 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 08/19/2008 |
| 7396887 | Insitu removal of chelator from anionic polymerization reactions A process for producing polymers having at least one high vinyl end segment is provided. The process comprises: (a) forming a living prepolymer high vinyl initiator with a vinyl content greater than about 45% using a vinyl modifier, (b) adding a R1R2... | 07/08/2008 |
| 7351777 | Retarded anionic polymerization of vinyl aromatic monomers using insoluble or heterogeneous retardants This invention is a process to manufacture high quality vinyl aromatic polymer that is essentially free of unreacted vinyl aromatic monomer using retarded anionic polymerization wherein the retardant is insoluble and can be removed from the polymerization at an inte... | 04/01/2008 |
| 7329697 | Elastomeric compositions The present invention includes compositions suitable for tire treads or sidewalls and other articles where abrasion resistance and flexibility are desirable. The invention includes a tire tread or sidewall made by combining a filler; a sulfur cure system; optionally... | 02/12/2008 |
| 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 than 15 wt. % containing repeating units derived from at least one iso... | 10/16/2007 |
| 7282269 | Cured rubber components for use with pharmaceutical devices Pharmaceutical containers containing at least one shaped component serving as a sealing barrier such as closure, stopper or plunger, for the contents of the container are disclosed. Such sealing barriers are made from elastomeric compositions containing a silylated ... | 10/16/2007 |
| 7241831 | Elastomeric compositions The present invention includes compositions suitable for air barriers such as innerliners where adhesion to tire carcass materials (e.g., SBR) and flexibility are desirable, as well as low air permeability. The invention includes a tire innerliner made by combining ... | 07/10/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7205035 | Thermoset composition, method, and article A curable composition includes a functionalized poly(arylene ether), an alkenyl aromatic monomer, an acryloyl monomer, and a polymeric additive selected from polystyrene, poly(styrene-maleic anhydride), poly(styrene-methyl methacrylate), polybutene, poly(ethylene-bu... | 04/17/2007 |
| 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 monomer by using a novel coinitiator in an aqueous suspension or aqu... | 04/10/2007 |
| 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 method is provided for cationically polymerizing olefin monomer by employi... | 03/27/2007 |
| 7094849 | Bulk polymerization process for producing polydienes A method of producing cis-1,4-polydienes, the method comprising the step of contacting conjugated diene monomer with a lanthanide-based catalyst system in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solven... | 08/22/2006 |
| 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 multiolefin monomer and optionally further copolymerizable monomers in the ... | 05/09/2006 |
| 7008899 | Lanthanide-based catalyst composition for producing cis-1,4-polydienes A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a lanthanide compound, (b) an organoaluminum hydride, and (c) a tin halide compound. ... | 03/07/2006 |
| 7001966 | Method for the production of isobutene polymers The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to particular functionalization products thereof. ... | 02/21/2006 |
| 6956075 | Halogenated elastomeric compositions having improved stability and green strength The present invention is a composition and a method of forming a composition, the composition comprising at least a halogenated elastomer and an amine or phosphine. An additional rubber component may be present in the composition of the invention. In one embodiment,... | 10/18/2005 |
| 6939933 | Process for polymerizing cationically polymerizable monomers The invention relates to a new catalyst system that improves the heat transfer capability of a butyl reactor slurry process system in the production of random copolymers of one or more isoolefin monomers and one or more conjugated diene monomers in continuous slurry... | 09/06/2005 |
| 6907911 | Thermoplastic blend The invention generally relates to thermoplastic blends having improved properties. Optionally, these blends may be dynamically vulcanized. More specifically, this invention is directed to a composition comprising a blend of chloromethylated(styrene-isobutylene) pol... | 06/21/2005 |
| 6906147 | Catalytic systems This invention relates to single-component and multi-component catalytic systems using aryl titanates. Aryl titanate compounds are useful as catalysts and co-catalysts in single-component and multi-component catalytic systems (e.g., for the polymerization of macrocy... | 06/14/2005 |
| 6878789 | Preparation process of acrylic acid ester polymer A process for the preparation of an acrylic acid ester polymer, includes carrying out polymerization of an acrylic acid ester or block copolymerization of an acrylic acid ester and another (meth)acrylic monomer in the presence of an organolithium compound and an org... | 04/12/2005 |
| 6858690 | Process for polymerizing cationically polymerizable monomers The invention relates to a new catalyst system that improves the heat transfer capability of a butyl reactor slurry process system in the production of isobutylene-based polymers in continuous slurry polymerization processes. The process is carried out in an anhydro... | 02/22/2005 |
| 6716929 | Superabsorbent polymers having a slow rate of absorption Superabsorbent polymers having a slow rate of absorption, and a process for their preparation. The superabsorbent polymer has a slow rate of absorption, is crosslinked with a covalent crosslinking agent and the metal of a polyvalent metal coordination compound, has ... | 04/06/2004 |
| 6689852 | Modifiers for improved olefin polymerization with activated neutral aluminum compounds The present invention is for a transition metal-free catalyst system for synthesizing high molecular weight, linear polymers. The system comprises a catalyst composition having: (a) a neutral compound having the formula AlR3, wherein R is an al... | 02/10/2004 |
| 6639032 | Highly branched polymer from telomerization A process for making hyperbranched polymers from An --Lz (XY)m type monomers wherein A is a polymerizable group moiety, XY is a telogen group moiety in which Y is a transferable atom or group which can participate in a tra... | 10/28/2003 |
| 6630553 | Process for the preparation of butyl rubber utilizing alkylaluminum dihalides and aluminoxanes A process for preparing a butyl polymer, the process comprising contacting a C4 to C8 monoolefin monomer with a C4 to C14 multiolefin monomer at a temperature in the range of from about -100° C. to about +50° ... | 10/07/2003 |
| 6624264 | Alkoxysilacycloalkanes, process for their preparation and their use for the polymerization of olefins The invention relates to alkoxysilacycloalkanes, to the process of their preparation and to their use in the polymerization of olefins. The introduction of these alkoxysilacycloalkanes into the olefin polymerization environment makes it possible to raise ... | 09/23/2003 |
| 6620898 | Production of polyisobutylene copolymers The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an improved continuous slurry polymerization process to produce rand... | 09/16/2003 |
| 6608154 | Process for synthesizing trans polydiene rubber The process and catalyst system of this invention can be utilized to synthesize polybutadiene rubber having a high trans content and a low melting point by solution polymerization. The trans-polybutadiene rubber made by the process of this invention can b... | 08/19/2003 |
| 6579958 | Superabsorbent polymers having a slow rate of absorption Superabsorbent polymers having a slow rate of absorption, and a process for their preparation. The superabsorbent polymer has a slow rate of absorption, is crosslinked with a covalent crosslinking agent and the metal of a polyvalent metal coordination com... | 06/17/2003 |
| 6576732 | Drag-reducing polymers and drag-reducing polymer suspensions and solutions A drag-reducing polymer is described, along with a method for manufacturing the drag-reducing polymer. The drag-reducing polymer is manufactured by bulk polymerizing a vinyl aromatic with an -olefin, wherein the -olefin has a carbon chain le... | 06/10/2003 |
| 6489416 | Process for synthesizing linear polymers of ethylene and alpha-olefins Ethylene and/or propylene are polymerized to form high molecular weight, linear polymers by contacting ethylene and/or propylene monomer, in the presence of an inert reaction medium, with a catalyst system which consists essentially of (1) an aluminum alk... | 12/03/2002 |
| 6444768 | Production of polyisobutylene copolymers The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an improved continuous slurry polymerization process to produce rand... | 09/03/2002 |
| 6353070 | Star polymers and process for producing the same Star polymers obtainable by polymerization of vinylaromatic monomers with a branching monomer unit containing at least two vinylaromatic functional radicals in the presence of a catalyst obtainable from A) a transition-metal complex from sub-group II to V... | 03/05/2002 |
| 6271324 | Method for preparing polyacryl(meth)acrylates Homopolymers, copolymers or block copolymers are prepared by anionic polymerization of acrylates and/or methacrylates in the presence of an initiator composition containing A) an organic alkali metal compound, B) an organic aluminum compound and C) an additive... | 08/07/2001 |
| 6268451 | Silyl-functional pseudo-telechelic polyisobutylene terpolymers A method for preparing a moisture-curable, pseudo-telechelic, silyl-functional polyisobutylene terpolymer is disclosed, said method comprising reacting, in the presence of a Lewis acid and a solvent, (A) an isobutylene monomer; (B) a isopropenylphenyl comonome... | 07/31/2001 |
| 6255420 | Start-up process for gas phase production of polybutadiene A process for starting a polymerization of butadiene to produce polybutadiene in a gas phase reactor having a seed bed which comprises (i) passivating the reactor and the seed bed by introducing an aluminum alkyl having a concentration ranging from about ... | 07/03/2001 |
| 6214951 | Cycloolefin copolymers having high tear strength and low optical attenuation Thermoplastic cycloolefin copolymers (COCs) having high tear strength and low optical attenuation, a process for their preparation, and their use as optical waveguides (optical fibers).... | 04/10/2001 |
