Patents Assigned to Atofina
  • Novel foams and coatings
    Publication number: 20030077455
    Abstract: Processes for the preparation of adherent polyvinylidene fluoride, hexafluoropropylene coatings on objects and for the direct production of open celled foams from a polymer latex without a need for any blowing agent.
    Type: Application
    Filed: April 29, 2002
    Publication date: April 24, 2003
    Applicant: ATOFINA Chemicals, Inc.
    Inventors: Ramin Amin-Sanayei, Lawrence K. Wempe, Kurt Arthur Wood, Stefano Finocchiaro, Delphine Tillier
  • Process for the preparation of hydrazine
    Patent number: 6551568
    Abstract: Process for the preparation of azine and of hydrazine by bringing ammonia, hydrogen peroxide and a reactant carrying a carbonyl group into contact with a working solution, comprising: the treatment of an aqueous stream resulting from the circuit for the regeneration of the said working solution with an amount of acid such that the pH of the said stream is brought to a value of less than 6.4, then the recycling of the said stream in the reactor for the synthesis of the azine.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: April 22, 2003
    Assignee: Atofina
    Inventors: Georges Brenguer, Rémi Jullin, Jean-Philippe Ricard
  • Process for manufacturing sulphurized olefins
    Patent number: 6544936
    Abstract: To manufacture sulphurated products deriving from olefin(s) by sulphurization using sulphur and hydrogen sulphide, the reaction is carried out in the presence of a zeolite.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: April 8, 2003
    Assignee: Atofina
    Inventor: Jean-Francois Devaux
  • Antistatic polymer compositions
    Publication number: 20030065107
    Abstract: The present invention relates to a composition comprising, per 100 parts by weight:
    Type: Application
    Filed: May 3, 2002
    Publication date: April 3, 2003
    Applicant: ATOFINA
    Inventors: Christophe Lacroix, Reinhard Linemann, Philippe Blondel, Yves Lermat
  • Films based on ethylene copolymers and gloves made of these films
    Patent number: 6538068
    Abstract: The present invention relates to film consisting of a blend comprising (i) 70 to 98% by weight of a polymer (Z) chosen from (a) a poly-ethylene (C) obtained by metallocene catalysis, (b) a copolymer (A) of ethylene and of a monomer chosen from vinyl acetate, the vinyl acetate content being between 18 and 40% by weight and an alkyl (meth)acrylate and (c) a blend thereof, (ii) 2 to 30% by weight of high-density polyethylene. The present invention also relates to gloves made of the above films. These gloves are manufactured by thermal welding of the films.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: March 25, 2003
    Assignee: Atofina
    Inventor: Michel Degrand
  • Method for preparing nitroxides
    Patent number: 6538141
    Abstract: The invention concerns a method for preparing nitroxides, which consists in oxidising, in a two-phase medium, using an aliphatic peroxide, secondary amines with steric hindrance or having a —CH in the nitrogen atom &agr;.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: March 25, 2003
    Assignee: Atofina
    Inventors: Jean-Philippe Gillet, Olivier Guerret, Jean-Pierre Lascombe
  • Method for making an organo-soluble (meth)acrylic resin composition, and use of same as binding agent for antifouling marine paints
    Patent number: 6534567
    Abstract: The invention concerns a method for making an organo-soluble (meth)acrylic resin composition which consists in: esterifying the COOH functions of a polymer comprising units derived from methacrylic acid, in a solvent medium, with Ti(OR)4, R representing one among ethyl, isopropyl, n-butyl, t-butyl, 2-ethylhexyl and t-amyl. The invention is characterised in that the esterification is carried out in the presence of at least a R′COOH monocarboxylic acid, R′ representing a linear, branched or cyclic C1-C18 alkyl radical; aryl; alkaryl; or aralkyl, by stopping esterification before a gel is formed, when the COOH resin and R′COOH functions have been added with a molar ratio Ti(OR)4/—COOH functions of the resin ranges between 1 and 3, and a molar ratio R′COOH/Ti(OR)4 ranges between 1 and 6.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: March 18, 2003
    Assignee: Atofina
    Inventors: Marie Humbert, Alain Riondel, Eric Jouandon, Andre Margaillan, Michel Camail, Jean-Louis Vernet
  • Process for preparing a catalyst support for polymerization of alpha-olefins, and support thus obtained
    Patent number: 6534433
    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: July 28, 2000
    Date of Patent: March 18, 2003
    Assignee: Atofina
    Inventors: Thierry Saudemont, Jean Malinge, Jean-Loup LaCombe, Daniel Cochard, Henri Violle
  • Stripping composition which can be used in particular in the construction and yachting field
    Patent number: 6534461
    Abstract: The invention relates to a stripping composition which can be used in the construction field, especially for the stripping of external organic coatings, such as exterior waterproof coatings and thin films, and in the yachting field, for the stripping of antifouling coatings, characterized in that it comprises: at least one dibasic ester, at least one dipolar aprotic solvent, at least one inorganic filler, water, at least one cellulose thickener, at least one dispersing agent and activators.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: March 18, 2003
    Assignee: ATOFINA
    Inventor: Jean-Pierre Lallier
  • Process for the controlled radical polymerization or copolymerization of ethylene under high pressure in the presence of initiating free radicals and of controlling indoline nitroxide radicals
    Patent number: 6531556
    Abstract: A radical (co)polymerization of ethylene is carried out under high pressure in the presence of at least one initiating free radical (Z•) and of at least one controlling stable free radical (SFR•) which comprises the indoline nitroxide backbone represented by the formula (I). A is a hydrocarbonaceous chain forming an aromatic ring with the two carbon atoms to which it is attached, this ring being able to carry substituents or being able to carry one or more rings placed side by side, which rings are aromatic or aliphatic and optionally substituted, the carbon atoms forming the nitrogenous ring and in the alpha- and beta-position with respect to the nitrogen atom being able to carry hydrogen atoms or substituents.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: March 11, 2003
    Assignee: Atofina
    Inventors: Eric Minaux, Lucedio Greci, Michael Buback, Paul Tordo, Thierry Senninger, Pierluigi Stipa, Patricia Carloni, Elisabetta Damiani, Giampaolo Tommasi
  • Preparation of 245fa
    Patent number: 6528691
    Abstract: A gas phase process for the preparation of 245fa is provided, wherein 1233zd is contacted with HF in the presence of a supported antimony catalyst.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: March 4, 2003
    Assignee: Atofina Chemicals, Inc.
    Inventors: Maher Y. Elsheikh, Bin Chen
  • Use of a structure based on poly(dimethylketene) and objects comprising this structure
    Patent number: 6528135
    Abstract: A structure comprising at least one layer 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 a barrier against oxygen permeation under high relative humidity, making the structure useful for packaging and hollow bodies, such as pipes, bottles and containers.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: March 4, 2003
    Assignee: Atofina
    Inventors: Hélène Egret, Claude Bunel, Jean-Pierre Couvercelle, Michaël Werth, Yves Germain
  • Coextrusion binder based on cografted metallocene polyethylene
    Patent number: 6528587
    Abstract: The present invention relates to a coextrusion binder comprising: 5 to 35 parts of a polymer (A) which itself consists of a blend of 80 to 20 parts of a metallocene polyethylene (A1) of relative density between 0.865 and 0.915 and of 20 to 80 parts of a non-metallocene LLDPE polyethylene (A2), the blend of (A1) and (A2) being cografted by an unsaturated carboxylic acid; 95 to 65 parts of a polyethylene (B) chosen from ethylene homopolymers or copolymers and elastomers; the blend of (A) and (B) being such that: the content of grafted unsaturated carboxylic acid is between 30 and 100 000 ppm, the MFI or melt flow index (ASTM D 1238 standard: 190° C./2.16 kg) is between 0.1 and 10 g/10 min. The present invention also relates to a multilayer structure.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: March 4, 2003
    Assignee: Atofina
    Inventors: Patrice Robert, Christophe Le Roy, Jerome Pascal
  • Copolymers containing polyamide blocks and polyether blocks based on ethoxylated amines
    Patent number: 6528615
    Abstract: The present invention relates to copolymers containing polyamide blocks and polyether blocks based on ethoxylated primary amines, these copolymers having a melting point of between 80° C. and 135° C. and an MFI (melt flow index) of between 5 and 80 g/10 min (2.16 kg-150° C.). The invention also relates to adhesives of the HMA (or hot melt adhesive) type consisting of the above copolymers containing polyamide blocks and polyether blocks.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: March 4, 2003
    Assignee: Atofina
    Inventors: Hermann Hilgers, Reinhard Linemann
  • Cathode for electrolyzing aqueous solutions
    Patent number: 6527924
    Abstract: A cathode comprising an electrically conductive substrate made of titanium, nickel, tantalum, zirconium, niobium, iron or alloys thereof, coated with an intermediate layer of oxides of titanium and of a precious metal, and with an outer layer comprising metal oxides of titanium, zirconium and a precious metal, can be used for the electrolysis of solutions, in particular for the electrolysis of aqueous solutions of alkali metal chlorides.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: March 4, 2003
    Assignee: Atofina
    Inventors: Françoise Andolfatto, Philippe Joubert
  • Grafted isotactic polypropylene obtained by metallocene catalysis
    Publication number: 20030040579
    Abstract: The present invention relates to an isotactic polypropylene obtained by metallocene catalysis, onto which is grafted a functional monomer.
    Type: Application
    Filed: July 31, 2002
    Publication date: February 27, 2003
    Applicant: ATOFINA
    Inventor: Jean-Laurent Pradel
  • Antistatic acrylic polymer compositions
    Patent number: 6525134
    Abstract: The present invention relates to an antistatic composition having improved impact strength behaviour, comprising, per 100 parts by weight: 95 to 80 parts of (A)+(C), 5 to 20 parts of (B), (A) being an acrylic polymer, (B) being a copolymer containing polyamide blocks and polyether blocks essentially comprising ethylene oxide —(C2H4—O)— units, (C) being a polymer chosen from acrylic impact modifiers, low-mass copolymers (C1) of styrene and of an unsaturated carboxylic anhydride, copolymers (C2) of ethylene and of an unsaturated carboxylic anhydride, copolymers (C3) of ethylene and of an unsaturated epoxide, or mixtures thereof.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: February 25, 2003
    Assignee: Atofina
    Inventors: Christophe Lacroix, Gilles Meunier
  • Polyamide conveyor elements
    Patent number: 6525137
    Abstract: The invention relates to an improvement to conveyors comprising moving elements which slide over fixed elements such that at least one moving element made of a polyamide-based blend (A) slides over a fixed element made of polyacetal and/or such that at least one moving element made of polyacetal slides over a fixed element made of a polyamide-based blend (A).
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: February 25, 2003
    Assignee: Atofina
    Inventors: Patrick Alex, Christian Capion Knudsen, Niels Peter Rosenkrands
  • Complex material with improved properties, consisting of polyvinylidene fluoride and of an incompatible thermoplastic
    Patent number: 6524686
    Abstract: The invention relates to an article containing at least three layers, which is intended to adhere to a polymer incompatible with polyvinylidine fluoride (PVDF). The article comprises at least one layer of PVDF, at least one layer of PVDF rendered opaque to UV and visible radiation, and a composition for adhesion of the PVDF to an incompatible thermoplastic. The three-layer complex may be obtained by coextrusion. The three-layer complex is generally intended to form, with a PVDF-incompatible thermoplastic material, a novel 4-layer integral complex, either by coextrusion or by hot-pressing.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: February 25, 2003
    Assignee: Atofina
    Inventor: Albert Strassel
  • Structure comprising a fluoropolymer layer and a piperazine-based tie resin
    Publication number: 20030035971
    Abstract: A structure made of a fluoropolymer layer and directly attached to one of its sides a tie layer based on a polyamide which results from the condensation of at least one diacid and at least one diamine of the following formula (1): 1
    Type: Application
    Filed: June 19, 2002
    Publication date: February 20, 2003
    Applicant: ATOFINA
    Inventors: Philippe Bussi, Christophe Lacroix, David Silagy