Patents Assigned to Atofina
  • Fluorous phosphines and process for their preparation
    Patent number: 6458978
    Abstract: A fluorous phosphine wherein the phosphor is coupled to at least one aryl or alkyl moiety, to which moiety a fluorous tail is coupled, wherein a spacer group, containing a non-carbon atom, is positioned between the aryl or alkyl moiety and the fluorous tail, a process for the preparation of said phosphines, metalcomplexes, catalysts and catalyst compounds therefrom and their use in catalysis.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: October 1, 2002
    Assignee: Atofina Vlissingen B.V.
    Inventors: Bodo Richter, Aloysius Cornelius A. de Wolf, Gerard van Koten, Berth Jan Deelman
  • Microcomposite powder based on an electrical conductor and a fluoropolymer, and objects manufactured with this powder
    Publication number: 20020136941
    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: Application
    Filed: November 20, 2001
    Publication date: September 26, 2002
    Applicant: ATOFINA
    Inventors: Anthony Bonnet, Karine Triballier, Philippe Bussi, Michael Burchill, Michel Foure
  • Process for preparing unsaturated carboxylic esters
    Publication number: 20020133041
    Abstract: This process for preparing an unsaturated carboxylic ester by esterifying an unsaturated carboxylic acid with an alcohol in the presence of a cationic resin catalyst, the water of reaction being removed in the form of an azeotrope with the esterifying alcohol or with a solvent, is characterized in that the esterification reaction is conducted by passing the mixture of reactants in upflow mode through a bed (9) of the said cationic resin in a recirculation loop (2) which is combined with a stirred tank (1) in which the reactants are mixed and from which the water of reaction is removed azeotropically.
    Type: Application
    Filed: December 26, 2001
    Publication date: September 19, 2002
    Applicant: ATOFINA
    Inventors: Jean-Michel Paul, Patrick Busca
  • Composition based on an ethylene-vinyl alcohol copolymer and its use
    Patent number: 6451911
    Abstract: The invention relates to a composition based on an ethylene-vinyl alcohol copolymer comprising: 50 to 98% by weight of an EVOH copolymer 1 to 50% by weight of a polyethylene (A) 1 to 15% by weight of a polymer (B) resulting from the reaction (i) of a copolymer (B1) of ethylene and of an unsaturated monomer X grafted or copolymerized with (ii) a polyamide (B2). It also relates to a multilayer structure comprising a layer consisting of this composition. This structure is useful for making packaging. The composition of the invention also adheres well to PET, this property being useful in coinjection to make bioriented preforms.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: September 17, 2002
    Assignee: Atofina
    Inventors: Denis Bertin, Denis Germain, Patrice Robert
  • Process for continuous polymerization with micromixing of reactive fluids
    Publication number: 20020128416
    Abstract: The process for the continuous preparation of homopolymers or copolymers by free-impinging-jet micromixing of fluids formed (1) of monomer(s) and (2) of an initiator system consists in micromixing the said fluids (1) and (2) and in recovering the mixture of these fluids in the form of a resultant jet Jr, originating from the point of impingement (I), the micromixture being obtained by:
    Type: Application
    Filed: July 25, 2001
    Publication date: September 12, 2002
    Applicant: ATOFINA
    Inventors: Xavier Marcarian, Christophe Navarro, Laurent Falk, Fernand Pla
  • Polyamide-based thermoplastic compositions
    Publication number: 20020128386
    Abstract: Polyamide-based thermoplastic compositions comprising by weight:
    Type: Application
    Filed: September 26, 2001
    Publication date: September 12, 2002
    Applicant: ATOFINA
    Inventors: Thibaut Montanari, Jean-Marc Durand
  • Moisture-setting polyurethane adhesive
    Patent number: 6448193
    Abstract: A moisture-crosslinkable polyurethane adhesive, comprising a) 70 to 95% by weight of a polyurethane polyaddition prepolymer comprising units of at least one polyol and at least one polyisocyanate and, b) 5 to 30% by weight of an essentially amorphous poly-&agr;-olefin, the adhesive comprising a content of free NCO groups representing 1 to 20% by weight of the adhesive.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: September 10, 2002
    Assignee: Atofina
    Inventors: Michel Miskovic, François Bauduin, Patrick Bouttefort, Jean-François Chartrel
  • Method for preparing an aqueous hydrogen peroxide solution directly from hydrogen and oxygen
    Patent number: 6447743
    Abstract: A catalytic process and a device for preparing, in absolute safely, aqueous hydrogen peroxide solutions at high concentration levels directly from hydrogen and oxygen; more particularly, a method whereby hydrogen and oxygen are injected, into the aqueous medium in proportions corresponding to the flammability range of the hydrogen-oxygen mixture, and are present in proportions outside the flammability range in the continuous gas phase. The invention also concerns a device for implementing the method.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: September 10, 2002
    Assignee: Atofina
    Inventors: Michel Devic, Lionel Delais
  • Paints comprising aqueous dispersions of hydroxylated fluorinated copolymers
    Patent number: 6448328
    Abstract: The present invention relates to stable aqueous dispersions comprising one or a number of hydroxylated fluorinated copolymers consisting of vinylidene fluoride and/or of trifluoroethylene, of tetrafluoroethylene, of one or a number of hydroxylated allylic monomers, and optionally of one or a number of monomers chosen from non-hydroxylated vinyl ethers. The stable aqueous dispersions optionally further comprise one or a number of acrylic copolymers consisting of methyl methacrylate and of one or a number of other alkyl (meth)acrylate(s), which are optionally functionalized or substituted. The stable aqueous dispersions are prepared by dispersion in water of an organic solution of the above copolymers and then by removal of the organic solvent. They can in particular be used as binders for aqueous-phase paints or varnishes.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: September 10, 2002
    Assignee: Atofina
    Inventors: Patrick Kappler, Jean Luc Perillon, Catherine Savary
  • Process for producing methylcyclohexyl (METH) acrylates
    Publication number: 20020123643
    Abstract: A methylcyclohexyl (meth)acrylate with formula (I) is prepared by reacting a lower (meth)acrylate (II) with an alcohol (III) in the presence of a transesterification catalyst selected from titanium, tin, zirconium, magnesium, calcium, lithium, potassium or sodium alcoholates; chelates of zirconium, calcium, magnesium or lithium with 1,3-dicarbonyl compounds; dialkyltin oxides, dialkyltin dialkoxides, dialkyltin diesters and distannoxanes and magnesium, calcium or lithium hydroxides.
    Type: Application
    Filed: October 25, 2001
    Publication date: September 5, 2002
    Applicant: ATOFINA
    Inventor: Jean-Micheal Paul
  • Process for the high-pressure polymerization of 1, 1-difluoroethylene
    Publication number: 20020123585
    Abstract: The invention relates to a continuous process for the manufacture of PVDF homopolymer or copolymer. The optional comonomer comprises a vinyl group polymerized by free radicals, and comprises at least one fluorine atom, a fluoroalkyl group or a fluoroalkoxy group, directly attached to this vinyl group. The invention also relates to PVDF homopolymers made by processes of the invention. The invention further relates to a process for deoxygenating a flow.
    Type: Application
    Filed: September 26, 2001
    Publication date: September 5, 2002
    Applicant: ATOFINA
    Inventor: Thierry Senninger
  • Acrylamide and trialkylammonium salt copolymer, method for obtaining same and coated textile
    Patent number: 6444770
    Abstract: A copolymer of acrylamide or of an acrylamide derivative and of trialkylammonium salts which is a radical polymerization product, in the presence of an initiator, of at least a first monomer chosen from acrylamide and its derivatives of formula H2C═CH—(CH2)n″—CONH2  in which n″ is an integer which can vary from 1 to 5, and of a second monomer chosen from trialkylammonium salts corresponding to the following formula (I) (H2C═C(R1)—(CH2)n—A—(CH2)n′—N+(R2)(R3)(R4))X−  (I)  in which, R1 represents H or an alkyl group having from 1 to 3 carbon atoms, R2, R3 and R4, which are identical or different, each represents an alkyl group having from 1 to 3 carbon atoms, n and n′ each represents, independently of one another, a non-zero integer at most equal to 15, A represents a divalent carboxyl or amide functional group, and X− represents a counterion.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: September 3, 2002
    Assignee: Atofina
    Inventors: Isabelle Descheres, Gilbert Boulon
  • Use and production of polypropylene
    Publication number: 20020120080
    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 crystallization 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:
    Type: Application
    Filed: August 24, 2001
    Publication date: August 29, 2002
    Applicant: ATOFINA Research, S.A.
    Inventor: Axel Demain
  • Method for conditioning long chain alkyl acrylates
    Patent number: 6441221
    Abstract: The invention relates to a process for packaging long-chain alkyl acrylates by mixing them with a sufficient amount of solvent, e.g. xylenes, ethylbenzenes or trimethylbenzenes, thereby facilitating the handling of said acrylates by reducing the melting point of the mixture.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: August 27, 2002
    Assignee: Atofina
    Inventors: Jean-Michel Paul, Jean-Paul Gamet
  • Vapor phase oxidation of propylene to acrolein
    Patent number: 6437193
    Abstract: An improved method for the selective vapor phase oxidation of propylene to acrolein in a recirculating solids reactor system using a bismuth molybdate multimetal oxide involving specific reactant concentrations (preferably 5 mol % to 30 mol % propylene, 0 to 20 mol % oxygen, and the remainder inert gas), particle size (1 to 300 micrometers), temperature (250 to 450° C.) and gas (1 to 15 seconds) and solids (2 to 60 seconds) residence times. Such a process leads to improved selectivity and propylene conversion.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: August 20, 2002
    Assignees: E. I. du Pont de Nemours and Company, Atofina
    Inventors: Rashmikant Maganlal Contractor, Mark William Andersen, Daniel Campos, Gerard Hecquet, Roland Kotwica, Charlotte Pham, Michel Simon, Mireille Stojanovic
  • Compositions based on polyolefins and low-melting-point polyamides
    Patent number: 6432548
    Abstract: The invention relates to compositions containing a polyamide matrix (A) and a polyolefin dispersed phase (B), in which compositions the polyamide has a melting point below that of PA-6 and the dispersed phase consists of at least one polyolefin (B) chosen from functionalized polyolefins (B1) and non-functionalized polyolefins (B2). Advantageously, (A) is PA-6/12 or PA-6/6,6. These compositions are useful for making monolayer or multilayer films by extrusion with EVA or PE.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: August 13, 2002
    Assignee: Atofina
    Inventors: Patrick Alex, Jean-Jacques Flat, Philippe Blondel, Gérard Reignier
  • Vinyl chloride-based polymers capable of giving plastisols having specific properties, and process for obtaining them
    Patent number: 6433060
    Abstract: The present invention relates to a process for seeded microsuspension polymerization of vinyl chloride in aqueous medium under the action of at least one organosoluble initiator, at least one reducing agent and at least one water-soluble metal salt in the presence of at least one fatty acid alkali metal or ammonium salt. It also relates to the polymers obtained in this way which are suitable for giving plastisols having specific properties.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: August 13, 2002
    Assignee: Atofina
    Inventors: Christian Bonardi, Bernard Bonnaud, André Chippaux, Richard Peres
  • Tube based on vulcanized elastomer and fluoropolymer
    Publication number: 20020106470
    Abstract: The present invention relates to a tube having in its radial direction, from the inside outwards:
    Type: Application
    Filed: December 11, 2001
    Publication date: August 8, 2002
    Applicant: ATOFINA
    Inventors: Joachim Merziger, Christophe Maldeme
  • Preparation of a recording carrier
    Patent number: 6428872
    Abstract: Disclosed is a molded disc useful in optical information recording carriers, the disc is comprised of a copolymer of methyl methacrylate and ethyl acrylate, wherein the copolymer is comprised of 97 to 99.9 wt. % of methyl methacrylate and 0.1 to 3 weight % ethyl acrylate, has a molecular weight in the range of from 90,000 to 115,000, has a Tg of from 105° C. to 115.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: August 6, 2002
    Assignee: ATOFINA
    Inventors: Michael Stefan Cholod, Donald Richard Hone, David Henry Stone
  • Impact additive of the core/shell type for thermoplastic polymers
    Patent number: RE37851
    Abstract: The invention relates to an impact additive of the core/shell type for thermoplastic polymers. This impact additive comprises a crosslinked elastomeric core based on n-alkyl acrylate and a shell made of poly(alkyl methacrylate) grafted onto the said core.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: September 17, 2002
    Assignee: Atofina
    Inventors: Chris Bertelo, Gilles Meunier, Andre Lermite, Pascale Dargelos, Xavier Drujon