Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7423098 | Polyethylene process An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C6-C10 alpha-olefin in the presence of a single-site catalyst capable of making a high molecular weight polyolefin. The process yields ... | 09/09/2008 |
| 7405260 | Method for controlling the polymer flow in a polymerization process A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the presence of a polymerization catalyst, the density of solid (Kg of poly... | 07/29/2008 |
| 7402646 | Polymerization of diisopropenylbenzene Processes for preparing substantially linear polymers from diisopropenylbenzenes are provided. The polymers are useful in making a variety of products, including coatings, pigment dispersing agents, and stabilizers. ... | 07/22/2008 |
| 7396892 | Process for removal of intermediate hydrogen from cascaded polyolefin slurry reactors Multimodal polyolefin polymers may be prepared in series-connected polymerization reactors where a prior reactor is a slurry reactor employing light solvent as the slurry medium and hydrogen to limit polymer molecular weight, the polymer product from the prior react... | 07/08/2008 |
| 7345122 | High stereospecific polybutylene polymer and highly active process for preparation thereof Disclosed is a process for the preparation of a high stereospecific (isotactic) polybutylene polymer comprising the step of polymerizing a reactive monomer, 1-butene, which is used or is not used as a solvent, in the presence of catalyst and inert gas. According to ... | 03/18/2008 |
| 7323523 | Adjusting polymer characteristics through process control Properties of a polymer produced in gas phase or slurry phase using a dual catalyst such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, (co)monomer pressure, hydrogen partial pressure and the ... | 01/29/2008 |
| 7321015 | Adjusting polymer characteristics through process control Properties of a polymer produced using a dual catalyst on the same support, such as polydispersity and comonomer incorporation, may be controlled by controlling reaction parameters such as temperature, monomer pressure, hydrogen partial pressure and the presence of ... | 01/22/2008 |
| 7300988 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 11/27/2007 |
| 7238756 | Polymerization process and control of polymer composition properties Methods of controlling the flow index and/or molecular weight split of a polymer composition are disclosed. The method of producing a polymer composition in one embodiment comprises incorporating a high molecular weight polymer into a low molecular weight polymer to... | 07/03/2007 |
| 7223825 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 05/29/2007 |
| 7157531 | Methods for producing polymers with control over composition distribution Methods for controlling a melt viscosity of a polyolefin, controlling comonomer distribution of a polyolefin, achieving a targeted melt viscosity of a polyolefin, and films made from such polyolefins are provided. The methods include contacting an olefin monomer and... | 01/02/2007 |
| 7144928 | UV-transparent pressure sensitive adhesive A UV-transparent pressure sensitive adhesive comprising (a) a copolymer of (a1) from 75 to 99.8% by weight of acrylic esters and/or methacrylic esters of the formula CH2═CH(R1)(C... | 12/05/2006 |
| 7122606 | Olefin polymerization process A process for polymerizing one or more alpha-olefins of formula CH2═CHT wherein T is a hydrogen atom or a C1–C20 alkyl radical comprising the following steps: a) contacting in a continuous way one or more of said alpha olefins wi... | 10/17/2006 |
| 7078467 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 07/18/2006 |
| 7041757 | Latent metallocene catalyst systems for olefin polymerization A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of an unsaturated hydrocarbon passivating compound. ... | 05/09/2006 |
| 6995216 | Process for manufacturing single-site polyolefins A dual olefin polymerization process is disclosed. The process uses a bridged indenoindolyl ligand-containing Group 4 transition metal complex and an activator. It is carried out in multiple stages or in multiple reactors. The same complex and the same activator are... | 02/07/2006 |
| 6988022 | Method for online estimation of reactor split for multimodal polyolefins The present method is directed to techniques for estimating and periodically controlling the reactor split of alpha-olefin polymerizations using multiple catalysts that selectively incorporate monomers and other reactants into polymer compositions. The method provid... | 01/17/2006 |
| 6924340 | Process for removal of intermediate hydrogen from cascaded polyolefin slurry reactors Multimodal polyolefin polymers may be prepared in series-connected polymerization reactors where a prior reactor is a slurry reactor employing light solvent as the slurry medium and hydrogen to limit polymer molecular weight, the polymer product from the prior react... | 08/02/2005 |
| 6921799 | Olefin polymerization process The invention relates to a process for the preparation of an olefin polymer comprising at least two polymerization stage in the presence of an olefin polymerization catalyst material, an olefin polymer produced by such process, and the use of such polymers for the p... | 07/26/2005 |
| 6891018 | Ethylene copolymer and uses thereof An ethylene copolymer is provided which is a copolymer of ethylene and an α-olefin of 3 to 20 carbon atoms and has the following properties: (a) the melt index (MI2) at 190° C. under a load of 2.16 kg is in the range of 0.0001 to... | 05/10/2005 |
| 6891001 | Process for the gas phase polymerization of olefins A process for preparing and controlling the density of high density polyethylene in the gas phase comprising contacting ethylene or a mixture of ethylene and one or more alpha-olefins with a chromium oxide catalyst supported on a granular or microspherical refractor... | 05/10/2005 |
| 6881801 | Method for feeding catalysts In a method of adding catalysts for the polymerization of C2-C20-olefins, the catalyst is firstly introduced into a container A and the cocatalysts used are subsequently mixed with an inert solvent in a container B, and the contents of the cont... | 04/19/2005 |
| 6878784 | Polymer composition for pipes A multimodal polymer composition for pipes is disclosed. The polymer is a multimodal polyethylene with a density of 0.930-0.965 g/cm3, an MFR5 of 0.2-1.2 g/10 min, an Mn of 8000-15000, an Mw of 180-330×103, and... | 04/12/2005 |
| 6875826 | High melt strength polypropylene The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. T... | 04/05/2005 |
| 6867276 | Vinylaromatic polymers having high melt flow A process for preparing syndiotactic polymers of vinylaromatic monomers having improved melt flowability comprising contacting one or more vinylaromatic monomers with a catalyst system comprising a titanium coordination complex capable of preparing syndiotactic viny... | 03/15/2005 |
| 6846771 | Metal complexes of iminohydroxamic acids Complexes of the formulae Ia and Ib where M=Ti, Zr, Hf, V, Nb, Ta, Cr, Ni, Pd, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerization processes, gas-phase polymeriz... | 01/25/2005 |
| 6825287 | Polymerization process The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containin... | 11/30/2004 |
| 6818708 | Method of polymerizing olefin The process for polymerizing olefins uses a plurality of series-connected polymerization reactors in which at least one of second and subsequent reactors is a vapor-phase polymerization reactor containing a multicomponent gas. The process comprises the steps of: tak... | 11/16/2004 |
| 6794468 | Olefin polymerization process A process for polymerizing olefins is disclosed. The process combines a bridged indenoindolyl organometallic complex and an activator with a support material in the presence of an aromatic solvent. The supported catalyst containing the aromatic solvent is used to po... | 09/21/2004 |
| 6753390 | Gas phase polymerization process A gas phase polymerization process for producing a polyolefin composition is described, which includes passing a gaseous stream containing hydrogen gas and one or more monomers, including ethylene monomers, through a reactor that includes a fluidized bed, under reac... | 06/22/2004 |
| 6723804 | Monitoring and control of slurry processes for polymerizing olefins Processes, methods and apparatus relating to olefin polymerization include the use of Raman spectrometry to monitor the concentration of reactants, products or other chemical components. One or more polymerizaton conditions are adjusted in response to those monitore... | 04/20/2004 |
| 6723805 | Process for the controlled production of polyethylene and its copolymers A process for producing high density polyethylene (HDPE) or linear low density polyethylene (LLDPE) in gas phase reactors, isolated or combined, using chromium or Ziegler-Natta catalysts, provided with on-line control of certain process variables as well as physical... | 04/20/2004 |
| 6720399 | UV-crosslinkable acrylic hotmelt PSAs with narrow molecular weight distribution A polyacrylate pressure sensitive adhesive, having an average molecular weight Mw (weight average) of from 100 000 to 600 000 g/mol a polydispersity of not more than 3.0 copolymerized photoinitiator units, and a process for pre... | 04/13/2004 |
| 6716936 | Cascaded boiling pool slurry reactors for producing bimodal low to medium density polyethylene polymers The use of two or more light solvent boiling pool reactors in series allows polymerization of ethylene and comonomer(s) to cost effectively produce bimodal polyethylene copolymers having lower densities than are practically achievable with conventional stirred tank,... | 04/06/2004 |
| 6680361 | Shear thinning ethylene/-olefin interpolymers and their preparation Shear-thinning ethylene/-olefin and ethylene/-olefin/diene monomer interpolymers that do not include a traditional branch-inducing monomer such as norbornadiene are prepared at an elevated temperature in an atmosphere that has little or no h... | 01/20/2004 |
| 6677267 | Polymerization catalysts The present invention relates to a process for the polymerization and copolymerization of 1-olefins and to a catalyst to be used in said process wherein the catalyst comprises (1) a complex having formula (I) wherein M is Fe[II], Fe[III], Co[I], Co[II], C... | 01/13/2004 |
| 6673881 | Process for the preparation of low molecular weight hydrogenated nitrile rubber A hydrogenated nitrile rubber having lower molecular weights and narrower molecular weight distributions than those known in the art can be prepared by the olefin metathesis of nitrile butadiene rubber, followed by hydrogenation of the resulting metathesi... | 01/06/2004 |
| 6653431 | Low density polyolefin Use of a catalyst system comprising a metallocene catalyst component of general formula R" (CpRn)(Cp'R'n)MQ2 supported on an inert support in the slurry phase production of linear low density polyolefin, wherein Cp is a cy... | 11/25/2003 |
| 6646044 | Continuous production method of propylene-based block copolymer A stable continuous production of a propylene-based block copolymer can proceed for a long time without causing accumulation of particles having a small diameter by a process having the following steps: (1) polymerizing an -olefin containing liquid... | 11/11/2003 |
| 6632899 | Active non-metallocene pre-catalyst and method for tactic catalytic polymerization of alpha-olefin monomers An active non-metallocene pre-catalyst featuring a diamine diphenolate complex and a corresponding method for catalytic polymerization, in general, and, tactic catalytic polymerization, in particular, of alpha-olefin monomers using the disclosed pre-catal... | 10/14/2003 |
