Patents Assigned to Atofina
  • Medium density polyethylene compositions for film applications
    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
  • Water-in-oil polymer emulsion and method for making same
    Patent number: 6825301
    Abstract: The invention concerns a water-in-oil polymer emulsion containing in an organic and continuous phase practically non-miscible in water, finely comminuted water soluble polymers or capable of being swollen in water, a water-in-oil emulsifying agent and optionally wetting agents. The invention also concerns a method for preparing said emulsion. More particularly, it concerns a method for invert emulsion in the presence of one or several initiators belonging a specific family of azacarboxylic acid esters.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: November 30, 2004
    Assignee: ATOFINA, Elf Atochem, S.A.
    Inventors: Martine Cerf, Karine Triballier, Françoise Benard
  • Detergent biodegradable polyacrylates
    Patent number: 6818700
    Abstract: Novel biodegradable polymers consisting of a biodegradable core bound to at least two carboxylic polyacid-based branches via a bond capable of being broken by hydrolysis or by oxidation are described. Biodegradable detergent compositions containing such polymers are also described.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: November 16, 2004
    Assignee: Atofina
    Inventors: Christian Gancet, Rosangela Pirri, Bernard Boutevin, Bernard Guyot, Jean Lepetit
  • S-B-S compositions
    Patent number: 6817114
    Abstract: Use of compositions prepared with organic coupling agents carrying epoxy groups for preparing applications requiring simultaneously improved mechanical properties and low viscosity.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: November 16, 2004
    Assignee: Atofina Research S.A.
    Inventor: Pierre Bredael
  • Method for polymerizing olefins in the presence of nickel complexes and corresponding catalytic system
    Patent number: 6818714
    Abstract: This system consists of (A) at least one ligand (I) and (B) at least one nickel compound chosen from nickel complexes of zero oxidation state; &pgr;-allylnickels; and compounds of the bis(allyl)nickel type where E, E′=O, S; X, X′=P, As, Sb; R1, R′1=H, alkyl, aryl, arylalkyl, alkylaryl, halogen, OH, alkoxide where R′=a hydrocarbon radical of the C1-C15 type; —SO3Y where Y=Li, Na, NH4+, NR″4+ (R″=C1-C15 hydrocarbon radical); R2, R′2, R3, R′3, R4 and R′4=alkyl, arylalkyl; and R=divalent radical.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: November 16, 2004
    Assignee: Atofina
    Inventors: Atanas Tomov, Roger Spitz, Thierry Saudemont
  • Polymerization of fluoromonomers using a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant
    Publication number: 20040225053
    Abstract: Fluoropolymers are prepared by a process comprising polymerizing at least one fluoromonomer in an aqueous reaction medium containing monomer, a radical initiator and a 3-allyloxy-2-hydroxy-1-propanesulfonic acid salt as surfactant. The medium may optionally contain one or more of an antifoulant, a buffering agent and a chain-transfer agent.
    Type: Application
    Filed: May 6, 2003
    Publication date: November 11, 2004
    Applicant: ATOFINA Chemicals, Inc.
    Inventors: Roice Andrus Wille, Lotfi Hedhli, Mehdi Durali, Sayed Youssef Antoun
  • Shock vinylaromatic polymer by polymerization of a vinylaromatic monomer in the presence of free radical and a polymerization initiator
    Patent number: 6815500
    Abstract: The invention concerns a method for preparing a composition comprising a vinylaromatic polymer enclosing rubber nodules. The invention is characterised in that it includes a step for polymerising at least one vinylaromatic monomer in the presence of rubber, a polymerisation initiator and a stable free radical, said step being such that [FSFR×(SFR)]: [FAMO×(AMO)] range from 0.05 to 1, FFSR and FAMO representing the functionality of the stable free radical and the initiator respectively and (SFR) and (AMO) representing the molar quantities of the stable free radical and the initiator respectively, The final composition is particularly resistant to shock and/or shiny.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: November 9, 2004
    Assignee: Atofina
    Inventor: Jean-Marc Boutillier
  • Composition coextrudable with PVDF
    Patent number: 6811859
    Abstract: A composition coextrudable with PVDF comprises in parts by weight: 20 to 40 parts of PVDF; 40 to 60 parts of PMMA; 5 to 18 parts of an acrylic elastomer; 1 to 4 parts of a UV absorber; the total making 100 parts. Coextruded films comprise a layer of the above coextrudable composition directly attached to the latter; and a PVDF-based layer comprising, as main constituents, 50 to 100 parts of PVDF per 50 to 0 parts of PMMA respectively. The PVDF layer may be in the form of two layers: one placed against the coextrudable layer and comprising, as main constituents, 50 to 90 parts of PVDF per 50 to 10 parts of PMMA respectively; and the other (also called the outer layer) comprising, as main constituents, 75 to 100 parts of PVDF per 25 to 0 parts of PMMA respectively. The resultant products are generally applied to substrates, e.g. as protective films.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: November 2, 2004
    Assignee: Atofina
    Inventors: Anthony Bonnet, Francois Beaume, Karine Loyen, Karine Triballier, David Silagy
  • Thermoplastic polyester compositions having improved impact properties
    Patent number: 6809151
    Abstract: The present invention relates to the thermoplastic polyesters, which comprise, by weight (i) a thermoplastic polyester; (ii) an impact modifier comprising: (a) a core-shelf copolymer (A); (b) an ethylene copolymer (B) chosen from ethylene-unsaturated carboxylic acid anhydride copolymers (B1), ethylene-saturated epoxide copolymers (B2) and blends thereof; (iii) the (B)/(A) ratio being between 90/10 and 25/75 for proportions of impact modifier between 2 and 40% in 98 to 60% of polyester, respectively; (iv) the (B)/(A) ratio being between 25/75 and 10/90 for proportions of impact modifier between 18 and 40% in 82 to 60% of polyester, respectively. It is particularly useful for PET and PBT.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: October 26, 2004
    Assignee: Atofina
    Inventors: Christophe Lacroix, Alain Bouilloux
  • Process for preparing a catalyst support for polymerization of &agr;-olefins, and support thus obtained
    Patent number: 6803428
    Abstract: A process is provided for preparing a catalyst support for polymerizing &agr;-olefins comprising the steps of: (i) reacting, in the presence of a first electron donor, a chlorine-containing organic compound and a prior mixture of an alkylmagnesien and an aluminoxane and/or aluminosiloxane and/or alkylaluminum and, optionally, a second electron donor; and (ii) activating a product from step (i) in suspension in an inert liquid by means of an activation electron donor, together with the support thus obtained, a catalyst for polymerizing &agr;-olefins, comprising this catalyst support and a group IV transition metal halide, and a process for polymerizing &agr;-olefins, particularly propylene, comprising contacting the &agr;-olefin with the catalyst.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: October 12, 2004
    Assignee: Atofina
    Inventors: Thierry Saudemont, Jean Malinge, Jean-Loup Lacombe, Daniel Cochard, Henri Violle
  • Copper chemical mechanical polishing solutions using sulfonated amphiprotic agents
    Patent number: 6803353
    Abstract: A family of slurries useful in modifying exposed surfaces of wafers for semiconductor fabrication are provided along with methods of modifying exposed surfaces of wafers for semiconductor fabrication utilizing such a family of working slurries, and semiconductor wafers.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: October 12, 2004
    Assignee: Atofina Chemicals, Inc.
    Inventors: Nicholas Martyak, Glenn Carroll
  • Scorch-retardant composition
    Publication number: 20040198920
    Abstract: The present invention relates to the prevention of scorching before crosslinking of a thermoplastic and/or elastomeric composition with peroxides or azo compounds. This is achieved by using a family of specific nitroxides as additive.
    Type: Application
    Filed: April 3, 2003
    Publication date: October 7, 2004
    Applicant: Atofina
    Inventors: Fabien Debaud, Alfredo Defrancisci, Olivier Guerret, Jacques Kervennal
  • Composition comprising a nitroxide, a promoter and optionally a free-radical initiator
    Publication number: 20040195550
    Abstract: The present invention relates to the prevention of scorching before crosslinking of a thermoplastic and/or elastomeric composition with peroxides or azo compounds. This is achieved by using a nitroxide in combination with at least one crosslinking promoter (promoter) chosen from group (P) consisting of compounds containing at least one double bond, which may be difunctional or polyfunctional.
    Type: Application
    Filed: April 3, 2003
    Publication date: October 7, 2004
    Applicant: Atofina
    Inventors: Fabien Debaud, Alfredo Defrancisci, Olivier Guerret, Jacques Kervennal
  • Injector for use in a device for combustion of corrosive products
    Patent number: 6799964
    Abstract: The invention concerns an injector for the use in particular for combustion of corrosive products or a mixture thereof. Said injector comprises a flush cut tube housing, closed at one end, wherein are juxtaposed at least two flush cut tubes, and not more than eight tubes, said tubes perpendicularly passing through the wall, and at least one lateral branch pipe. The invention also concerns the use of said injector for implementing a method for the combustion of chlorine-containing corrosive products or a mixture thereof.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: October 5, 2004
    Assignee: Atofina
    Inventor: Rene Bidart
  • Use of a structure based on poly(dimethylketene) and objects comprising this structure
    Patent number: 6793995
    Abstract: A structure comprising one or more layers of a polymer (A) comprising: the units (A1) and the units (A2) wherein the A2/(A1+A2) molar ratio is between 0 and 30%, is suitable as a barrier against oxygen permeation under high relative humidity. The structure is, thus, useful as packaging and as hollow bodies, such as pipes, bottles and containers.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: September 21, 2004
    Assignee: Atofina
    Inventors: Hélène Egret, Claude Bunel, Jean-Pierre Couvercelle, Michaël Werth, Yves Germain
  • Foam premixes having improved processability
    Patent number: 6793845
    Abstract: A method for improving the processability of foam premixes containing HFC and/or pentane-based blowing agents in polyols is provided, which method comprises adding trans-1,2-dichloroethylene to said premix in an amount effective to enhance said processability.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: September 21, 2004
    Assignee: Atofina Chemicals, Inc.
    Inventors: Jinhuang Wu, Laurent S. J. Caron
  • Conductive polymeric composite material with a resistance which is self-regulated by the temperature
    Patent number: 6790530
    Abstract: The present invention relates to a composite material comprising, by weight, the total being 100% : A) 40 to 90% of PVDF homopolymer or copolymer crystallized essentially in the &bgr; form, B) 10 to 60% of a conductive filler, C) 0 to 40% of a crystalline or semi-crystalline polymer, D) 0 to 40% of a filler other than C, such that the crystals in the &bgr; form are nucleated on the surface of the particles of the conductive filler. This material is conductive with a resistance which is self-regulated by the temperature. It shows an increase in the resistance as a function of the temperature (PTC or “Positive Temperature Coefficient” effect), so that the intensity stabilizes at an equilibrium temperature.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: September 14, 2004
    Assignee: ATOFINA
    Inventors: Alexander Korzhenko, Emmanuel Rastelletti, R. G. Sharpe-Hill
  • Antistatic polymer compositions
    Patent number: 6784257
    Abstract: The present invention relates to an antistatic polymer composition and more specifically to a composition comprising a thermoplastic polymer (A) and a copolymer (B) comprising polyamide blocks and polyether blocks comprising essentially ethylene oxide units —(C2H4—O)—, the copolymer (B) having a melting temperature of between 80 and 150° C. It is of use for the polymers (A) which are heat-sensitive or which are processed at low temperature.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: August 31, 2004
    Assignee: Atofina
    Inventors: Hermann Josef Hilgers, Christophe Lacroix, Reinhard Linemann
  • Method for preparing catalyst for olefin polymerization
    Patent number: 6784133
    Abstract: Disclosed is a preparation method of titanium catalyst for olefin polymerization, the method comprising (1) preparing magnesium compound solution by resolving non-deoxidative magnesium halide and IIIA group atom compound in a solvent mixture of cyclic ether, at least one alcohol, phosphorus compound and organosilane with or without hydrocarbon solvent; (2) reacting said magnesium compound solution with titanium compound, silicon compound, tin compound or mixture thereof to produce a support; and (3) reacting said support with titanium compound and electron donor to produce solid complex titanium catalyst, wherein the particle size and particle size distribution f said catalyst are regulated by controlling solubility of the reactants in said steps (2) and/or (3).
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: August 31, 2004
    Assignee: Samsung Atofina Co. Ltd.
    Inventors: Il Seop Kim, Moon Young Shin, Ki Su Ro
  • Process for manufacturing silanized (meth)acrylates
    Patent number: 6780952
    Abstract: The silanized (meth)acrylate (I) is manufactured by reacting the anhydride (II) with a silanized compound (III). This process gives a crude mixture containing compound (IV) in addition to compound (I), after which the said mixture may be freed of the lightest compounds by distillation or may be subjected to a distillation to obtain the pure compound (I). R=H or Me; R1, R2, R3=linear or branched C1-C10 alkyl, aryl or aralkyl, these radicals possibly being substituted and possibly containing hetero atoms; R4=H or a radical falling within the definition given above for R1, R2 and R3.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: August 24, 2004
    Assignee: Atofina
    Inventors: Jean-Michel Paul, Joseph Rondini