Patents Assigned to Atofina
  • Patent number: 6872791
    Abstract: Disclosed herein is a polyolefin nanocomposite prepared by polymerizing an olefin monomer in a catalyst system comprising (1) a supported catalyst consisting of a polymer, a silicate clay mineral, and a transition metal compound, and cocatalyst, an alkyl aluminoxane.
    Type: Grant
    Filed: December 22, 2001
    Date of Patent: March 29, 2005
    Assignee: Samsung Atofina Co. Ltd.
    Inventors: Yoon Hwan Lee, Won Beum Jung, Young Soo Ko, Ki Su Ro
  • Patent number: 6864318
    Abstract: A composition comprising a thermoplastic polymer having incorporated therein a crosslinked phase derived from the reaction of: (A) a copolymer made from ethylene and an unsaturated epoxide, a polyolefin grafted with an unsaturated epoxide, or a product having two epoxide groups, (B) a copolymer made from ethylene and an unsaturated carboxylic acid anhydride, and (C) a copolymer made from an unsaturated carboxylic acid or an ?,?-aminocarboxylic acid.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: March 8, 2005
    Assignee: ATOFINA
    Inventors: Alain Bouilloux, Laurent Teze
  • Patent number: 6863941
    Abstract: An automobile fuel tank comprising at least two components which have been joined together to form a tank having a wall defining a fuel chamber, at least one of the components being injection moulded and defining a part of the wall and composed of a polyethylene having a density of from 0.930 to 0.955 g/cm3, a dispersion index D of from 2 to 3 and a melt index MI2 of from 0.2 to 2 g/10 min.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: March 8, 2005
    Assignee: ATOFINA Research S.A.
    Inventor: Patrick Detounay
  • Publication number: 20050048201
    Abstract: A coating apparatus includes a container and a perforated plate separating a plenum from a coating chamber. A gas supply system delivers a gas to the plenum in a sufficient amount for passage of the gas through the plate and suspension of a powder in a fluidized condition in the chamber. The gas supply system preferably includes a primary portion for continuously delivered gas and a controllable pulsing portion for supplementing the gas from the primary portion. In a first mode of operation, the gas from the pulsing portion is cycled to provide variation in the fluidized volume. In a second mode, the pulsing portion delivers relatively long pulses of gas to mix the fluidized powder.
    Type: Application
    Filed: August 29, 2003
    Publication date: March 3, 2005
    Applicant: ATOFINA Chemicals, Inc.
    Inventor: Joseph Mitchell
  • Patent number: 6861129
    Abstract: Disclosed is a mar resistant transparent co-extruded sheet which is comprised of (a) a cap layer containing particles having a mean particle size of about 1 to 60 microns wherein 90% of the particles are less than 70 microns, at a loading of 0.1 to 18%, melt blended with an acrylic matrix, wherein the particle and matrix have refractive indices within 0.020 units when measured in conformance with ASTM D 542; and (b) a clear substrate layer comprised of an acrylic composition, wherein the substrate has a refractive index within 0.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: March 1, 2005
    Assignee: Atofina
    Inventors: Jack J. Reilly, Jana Lamberson, Gary Hall, Thomas DeMain
  • Patent number: 6858133
    Abstract: A process for desulfurising an olefin-containing hydrocarbon feedstock including sulfur-containing hydrocarbon compounds as impurities, the process comprising passing a hydrocarbon feedstock containing one or more olefins through a reactor containing a crystalline silicate selected from the group consisting of an MFI-type crystalline silicate having a silicon/aluminum atomic ratio of at least 180 and an MEL-type crystalline silicate having a silicon/aluminum atomic ratio of from 150 to 800 which has been subjected to a steaming step to produce an effluent with an olefin content of lower molecular weight than that of the feedstock and removing hydrogen sulphide from the effluent.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: February 22, 2005
    Assignee: Atofina Research S.A.
    Inventors: Jean-Pierre Dath, Walter Vermeiren, Koen Herrebout
  • Patent number: 6858170
    Abstract: The present invention relates to a process for preparing silica-alumina carriers preferably under the form of extrudates. Further, the present invention also provides hydrogenation catalysts prepared thereof. These catalysts are used in an improved process for the reduction of the aromatic hydrocarbons content present in hydrocarbon streams.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: February 22, 2005
    Assignee: ATOFINA Research
    Inventors: Hugo Van Thillo, Philippe Bodart, Christian Lamotte, Jacques Grootjans
  • Patent number: 6852405
    Abstract: Disclosed is a composite sheeting comprised of polystyrene having a thin protective layer of an acrylic ester polymer and a process for producing the composite sheeting. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: February 8, 2005
    Assignee: Atofina
    Inventors: Robert A. Wanat, Leslie A. Cohen
  • Patent number: 6852812
    Abstract: A process is presented for the preparation of a latex by the emulsion polymerization at a temperature of between 30 and 90 C. of at least one ethylenically unsaturated monomer in the presence of at least one surfactant and of a seed of polymer particles with a diameter of between 200 and 450 nm. The seed particles represent from 5-25% by weight of the total weight of the monomer and seed. The polymerization is initiated by a mixed water-soluble/fat-soluble system. Also included are lattices obtained from this process.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: February 8, 2005
    Assignee: Atofina
    Inventors: Isabelle Betremieux, Karine Loyen, Nathalie Meeschaert, Pierre Nogues, Martine Schneider
  • Patent number: 6852883
    Abstract: In the process according to the invention for the manufacture of an alkanesulphonyl chloride RCH2—SO2Cl by oxidative chlorolysis of the corresponding mercaptan RCH2—SH, the mercaptan and water are introduced into the reaction mixture in the form of a dispersion of water in the mercaptan. This makes it possible to obtain both an alkanesulphonyl chloride of very good quality and a hydrochloric acid of commercial grade.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: February 8, 2005
    Assignee: Atofina
    Inventors: Jean Ollivier, Gisele Haurat
  • Patent number: 6852764
    Abstract: Provided is a blend comprising: a) from 20 to 60 wt % of a thermoplastic elastomer; b) from 8 to 30 wt % of a vinylaromatic polymer; c) from 10 to 30 wt % of one or more processing aid; d) from 0 to 20 wt % of one or more additives.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: February 8, 2005
    Assignee: Atofina Research S.A.
    Inventor: Jean-Marie Mlinaric
  • Patent number: 6846902
    Abstract: The invention relates to a process for trapping a free monomer which has not reacted by copolymerization or by grafting comprising at least one epoxide functional group in a thermoplastic composition based on ethylene and/or on propylene and based on at least one monomer comprising at least one epoxide functional group. The process can comprise the following stages: (i) preparation of the thermoplastic composition; and (ii) addition of a sufficient amount of a solid trapping additive exhibiting, at its surface, sites with a basic nature within the Lewis or Brönstead meaning. The trapping additive comprises a porous zeolite, the diameter of the pores of which is between 5 and 15 angströms, preferably between 6 and 13 angströms. The invention also relates to the composition obtained by such a process and to the blends comprising such a composition.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: January 25, 2005
    Assignee: Atofina S.A.
    Inventor: Thierry Senninger
  • Patent number: 6846888
    Abstract: Thermally stabilized initiator compositions comprising: (a) at least one dialkyl peroxydicarbonate, and (b) a stabilizing effective amount of a compound of Structure I: wherein R1 and R2 are as defined in the summary of the invention section, processes for their preparation and use are disclosed.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: January 25, 2005
    Assignee: ATOFINA Chemicals, Inc.
    Inventors: Barbara L. Stainbrook, Michael S. Mendolia, Terry N. Myers, Peter A. Callais, Joseph M. Brennan
  • Patent number: 6841697
    Abstract: Process for preparing a compound (I) by reacting a compound of formula (II) with the alcohol (III). The reaction is carried out using dibutyltin oxide as transesterification catalyst. R1=H or CH3 R2=linear C1-C4 alkyl radical.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: January 11, 2005
    Assignee: Atofina
    Inventors: Alain Riondel, Fabrice Castellani
  • Patent number: 6831131
    Abstract: The invention relates to a composition based on polypropylene homopolymer or copolymer and on an impact modifier comprising an ethylene/alkyl acrylate copolymer. This composition comprises substantially between 1 and 40% by weight of impact modifier and it may comprise an ethylene-based copolymer taken from the group comprising ethylene/acrylate copolymers, vinyl acetate copolymers, polyethylene obtained by metallocene catalysis or mPE and linear low-density polyethylene or LLDPE. The PP thus modified is useful for manufacturing motor-vehicle parts for example of the bumper or dashboard type, requiring good thermomechanical strength over a wide range of temperatures.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: December 14, 2004
    Assignee: Atofina
    Inventors: Alain Bouilloux, Christophe Lacroix
  • Patent number: 6830710
    Abstract: The present invention relates to a microcomposite powder comprising particles from 1 um to 300 um of an electrically conductive product, which are coated with particles from 0.1 &mgr;m to 0.5 &mgr;m of a fluoropolymer. According to one advantageous form of the invention the microcomposite powder comprises a product (A) which is a polymer or an oligomer which can be dissolved with a solvent which is not a solvent for the fluoropolymer or for the electrically conductive product. The present invention also relates to objects consisting of this powder. These objects may be bipolar plates for fuel cells, or supercapacitor components.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: December 14, 2004
    Assignee: Atofina
    Inventors: Anthony Bonnet, Karine Triballier, Philippe Bussi, Michael Burchill, Michael Foure
  • Patent number: 6830657
    Abstract: The invention concerns a method for obtaining an aqueous dispersion of hydrophobic polymers dispersed in the form of particles with mean diameter less than 100 nm stablized soley with a macromolecular surfactant based on low molecular weight styrene/maleic anhydride imide copolymer. The invention also concerns the use of said dispersion for treating and sizing paper.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: December 14, 2004
    Assignee: Atofina
    Inventors: Isabelle Betremieux, Christophe Dumousseaux, Bruno Feret, Jean-Jacques Flat
  • Publication number: 20040249094
    Abstract: Use of isotactic polypropylene homopolymers or copolymers in processes in which the polypropylene solidifies from a melt, wherein for enhanced speed of solidification of the polypropylene the polypropylene has a melt temperature and a crystallisation temperature not more than 50° less than the melt temperature resulting from the polypropylene having been produced using a metallocene catalyst component having the general formula as described herein:
    Type: Application
    Filed: March 3, 2004
    Publication date: December 9, 2004
    Applicant: ATOFINA Research, S.A.
    Inventor: Axel Demain
  • Patent number: 6828270
    Abstract: The supported catalyst according to the present invention comprises a support of organic or inorganic powder with a high-surface area, a polymer coated onto the support and a metallocene catalyst. The polymer (1) contains polar groups; (2) interacts with the surface of the support; and (3) is insoluble in the styrenic monomer or polymerization solvent during polymerization after the catalyst is loaded. The polymer is located between the support and the metallocene catalyst such that the polymer insulates the metallocene layer from the support layer to prevent poisoning of the metallocene catalyst layer by the support layer. The styrenic polymer powder such produced by the present invention has good flow-ability and good morphology demonstrating a great deal of industrial applicability.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: December 7, 2004
    Assignee: Samsung Atofina Co. Ltd.
    Inventors: Xuequan Zhang, Sung-Cheol Yoon, Jae-Gon Lim, Young-Sub Lee
  • Patent number: 6824886
    Abstract: Use of a homogeneous blend of a metallocene-catalysed medium density polyethylene (mMDPE) with low density polyethylene (LDPE), to produce blown films, this composition essentially consisting of from 0.5 to 99.5 % by weight of mMDPE and from 99.5 to 0.5 % by weight of LDPE, based on the total weight of the blend. The blend is optionally coextruded between layers of LDPE. The compositions of this invention have good processability and are used to make blown films which have the good optical properties of LDPE and the good mechancial and processing properties of MDPE.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: November 30, 2004
    Assignee: ATOFINA Research S.A.
    Inventor: Marc Tavernier