Patents Assigned to Atofina
  • Process for the manufacture of 2-ethylhexyl acrylate
    Publication number: 20020183542
    Abstract: 2-Ethylhexyl acrylate is manufactured according to a process for the direct esterification of acrylic acid with 2-ethylhexanol catalysed by sulphuric acid, the acrylic acid subjected to the esterification being stabilized by at least one stabilizing agent, the said esterification being followed by the neutralization by a base of the crude reaction mixture (B1) obtained, the resulting salts passing into the aqueous phase (A1) of the said mixture, the organic phase (O1) and the aqueous phase (A1) resulting from this neutralization being separated and the 2-ethylhexyl acrylate being recovered from the organic phase (O1). To suppress the emulsions which appear during the said neutralization, the stabilizer or stabilizers of acrylic acid is/are chosen with the exclusion of hydroquinone, in the absence of which the aqueous phase of the process is stabilized before and/or during the neutralization.
    Type: Application
    Filed: April 2, 2002
    Publication date: December 5, 2002
    Applicant: ATOFINA
    Inventors: Alain Riondel, Jacqueline Bessalem
  • Process for preparing 2-(dimethylamino)-1-(dimethyl-aminomethyl) ethyl meth (acrylate)
    Publication number: 20020183543
    Abstract: Process for preparing a compound (I) by reacting a compound of formula (II) with the alcohol (III).
    Type: Application
    Filed: April 26, 2002
    Publication date: December 5, 2002
    Applicant: ATOFINA
    Inventors: Alain Riondel, Fabrice Castellani
  • Polyamide-based transparent composition
    Publication number: 20020179888
    Abstract: The invention relates to a transparent composition comprising, by weight, the total being 100%:
    Type: Application
    Filed: January 25, 2002
    Publication date: December 5, 2002
    Applicant: ATOFINA
    Inventors: Thibaut Montanari, Christelle Recoquille
  • Initiation system and process for anionic (co) polymerization of (Meth) acrylic, vinylaromatic and/or diene monomers
    Patent number: 6489262
    Abstract: The present invention relates to an initiation system composed of the reaction product of at least one cyclic siloxane and at least one organometalic compound of sufficient reactivity to open the siloxane ring. Application of the present invention is to the preparation of homopolymers of (meth)acrylic, vinylaromatic or diene monomers, random or block copolymers of these monomers and, in particular, application to poly(methylmethacrylate) with a high content of isotactic triads.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: December 3, 2002
    Assignee: Atofina
    Inventors: Thomas Zundel, Philippe Teyssie, Robert Jerome, Christophe Navarro
  • Stabilized organic peroxydicarbonate compositions
    Publication number: 20020177678
    Abstract: Thermally stabilized initiator compositions comprising:
    Type: Application
    Filed: March 21, 2002
    Publication date: November 28, 2002
    Applicant: ATOFINA Chemicals, Inc.
    Inventors: Barbara L. Stainbrook, Michael S. Mendolia, Terry N. Myers, Peter A. Callais, Joseph M. Brennan
  • Polyamide-based transparent composition
    Publication number: 20020173596
    Abstract: The invention relates to a transparent composition comprising, by weight, the total being 100%:
    Type: Application
    Filed: January 28, 2002
    Publication date: November 21, 2002
    Applicant: ATOFINA
    Inventors: Thibaut Montanari, Christelle Recoquille
  • Method for preparing hydrazine hydrate
    Patent number: 6482383
    Abstract: A method for preparing hydrazine hydrate comprising: (a) reacting ammonia, hydrogen peroxide and methyl ethyl ketone in a working solution to form an azine; (b) separating the working solution from a mixture comprising the azine, methyl ethyl ketone oxime and optionally the methyl ethyl ketone which had not reacted; (c) recycling the working solution to step (a) after an optional treatment; (d) hydrolyzing the azine to obtain hydrazine hydrate and regenerating the methyl ethyl ketone; (e) recycling to step (a) the methyl ethyl ketone. In step (d) the methyl ethyl ketone oxime is purged.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: November 19, 2002
    Assignee: Atofina
    Inventor: Jean-Pierre Schirmann
  • Lithium-ion battery elements manufactured from a microcomposite powder based on a filler and on a fluoropolymer
    Publication number: 20020168569
    Abstract: The present invention relates to a lithium-ion battery element which is chosen from the separator and the electroactive layers and which results from the forming of a microcomposite powder comprising a fluoropolymer in the form of particles between 0.1 and 0.5 &mgr;m in size and fillers.
    Type: Application
    Filed: March 19, 2002
    Publication date: November 14, 2002
    Applicant: ATOFINA
    Inventors: Benoit Barriere, Philippe Bussi
  • Liquid phase process for HCFC-123
    Patent number: 6479718
    Abstract: An improved liquid phase process is provided for the fluorination of perchloroethylene to 1,1-dichloro-2,2,2-trifluoroethane in the presence of an antimony catalyst.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 12, 2002
    Assignee: Atofina Chemicals, Inc.
    Inventors: Maher Y. Elsheikh, Jonathan M. Tracy, John A. Wismer
  • Method and reactor for making norbornene
    Patent number: 6479719
    Abstract: This process for the manufacture of norbornene from dicyclopentadiene (DCPD) and ethylene is characterized in that the DCPD is subjected to partial monomerization to CPD by preheating: at a temperature of 140° C. to 240° C.; and under a pressure of 20 to 300 bar abs., before reacting it with the ethylene; with an ethylene/DCPD molar ratio of 1 to 20; at a temperature of 200° C. to 320° C.; under a pressure of 20 to 300 bar abs.; and with a residence time of 1 to 10 minutes, under stable reaction conditions between the DCPD, the CPD and the ethylene.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: November 12, 2002
    Assignee: Atofina
    Inventors: Roland Kotwica, André Marbach
  • Schockproof polyester-injected parts
    Patent number: 6476145
    Abstract: Polyester injection-moulded parts based on a polyester (A) and on a copolymer (B) of ethylene and of an unsaturated epoxy, such that weight % (B)×MFI (A+B)/MFI(A) is greater than 3 and in this expression: MFI (A+B) denotes the melt flow index of the modified polyester, that is to say the blend of (A) and (B) and of any fillers; MFI (A) denotes the melt flow index of the polyester (A) and of any fillers (without (B)); and weight % (B) denotes the percentage by weight of (B) in the blend of (A) and (B) and of any fillers.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: November 5, 2002
    Assignee: Atofina
    Inventors: Patrice Perret, Jacques Komornicki, Yoshiyuki Miyaki
  • Process for the anionic polymerization of lactams
    Publication number: 20020161167
    Abstract: For the anionic polymerization of lactams: (a) (i) a catalyst capable of creating a lactamate and (ii) a regulator chosen from amides of formula R1-NH—CO—R2, in which R1 can be substituted by an R3-CO—NH— or R3-0— radical and in which R1, R2 and R3 denote an aryl, alkyl or cycloalkyl radical, are dissolved in the molten lactam, (a1) the solution from stage (a) is cooled, optionally to the solid state in a form which can be divided, (a2) the product from stage (a1) is optionally reheated to a temperature below the polymerization temperature of the lactam, (a3) optionally, the product from stage (a1) is reheated and is maintained at a temperature between the melting temperature of the lactam and 15° C. above, and (b) the produce from any one of stages (a1), (a2) or (a3) is introduced into a mixing device or mold and is then heated to a temperature sufficient to obtain the bulk polymerization of the lactam.
    Type: Application
    Filed: September 24, 2001
    Publication date: October 31, 2002
    Applicant: ATOFINA
    Inventors: Nicola Hoogen, Andreas Wollny, Heike Faulhammer, Rolf Muelhaupt
  • Fluid transport
    Patent number: 6470691
    Abstract: A conduit for transporting non-volatile liquids is provided in which the conduit's internal surfaces have a surface energy lower than that of the non-volatile liquid.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: October 29, 2002
    Assignee: Atofina Chemicals, Inc.
    Inventors: Sivakumar Gopalnarayanan, Scott R. Gaboury
  • Process for manufacturing sulphurized olefins
    Patent number: 6472354
    Abstract: To manufacture sulphurated products derived from olefin(s) by sulphurization using sulphur and hydrogen sulphide, the reaction is carried out in the presence of a solid acid catalyst and of a solid basic catalyst.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: October 29, 2002
    Assignee: Atofina
    Inventors: Piet Luyendijk, Jean-Francois Devaux, Bernard Monguillon
  • Polyamide- and EVOH-based multiplayer tube for fluid transfer
    Publication number: 20020155242
    Abstract: The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards:
    Type: Application
    Filed: March 25, 2002
    Publication date: October 24, 2002
    Applicant: ATOFINA
    Inventors: Gaelle Bellet, Anthony Bonnet, Joachim Merziger
  • Acrylates comprising several quaternary amino groups in the alcohol part, their process of manufacture and the (co) polymers obtained from these monomers
    Patent number: 6469204
    Abstract: These compounds are represented by the formulae (Ia) and (Ib). To prepare them, in a first stage, p-xylylene dichloride is reacted with a compound (II) to produce a compound (III) and, in a second stage, the compound (III) thus obtained is reacted with a compound of formula (IVa) or (IVb), resulting in an aqueous solution of the compound (Ia) or (Ib) respectively, the water of which is removed, if appropriate.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: October 22, 2002
    Assignee: Atofina
    Inventors: Alain Riondel, Vladimir Chaplinski
  • Low precipitate polyamide based tubing
    Patent number: 6467508
    Abstract: Low precipitate polyamide tubing useful to transport fluids such as automotive fuel.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: October 22, 2002
    Assignee: Atofina Chemicals, Inc.
    Inventors: Mehdi M. Emad, Gregory S. O'Brien
  • Thermoforming multilayer film for protecting substrates, and objects obtained
    Publication number: 20020150763
    Abstract: A thermoforming multilayer film comprising successively: at least one layer chosen from layers A1 and A2, an optional layer B1, a layer B2, a layer B3, and an optional layer B4. A1 comprises a fluoropolymer A111 or a polymer A112 consisting essentially of alkyl(methyl)acrylate units or a blend of the two, layer A2 consists of ink, layer B1 comprises a fluoropolymer B111 or a polymer B112 consisting essentially of alkyl(meth)acrylate units or a blend of the two, layer B2 is based on a polyamide, layer B3 consists of polyolefin functionalized with unsaturated carboxylic anhydride and layer B4 comprises polyolefin. A process for producing the multilayer film comprising co-extrusion is described.
    Type: Application
    Filed: January 22, 2002
    Publication date: October 17, 2002
    Applicant: ATOFINA
    Inventors: David Silagy, Frank Bertoux, Phillipe Bussi, Anthony Bonnet
  • Thermoplastic resin compositions comprising a rigid dispersed phase
    Patent number: 6462129
    Abstract: The invention relates to a thermoplastic composition comprising: a matrix-forming thermoplastic polymer (M), rigid nodules obtained by radical polymerization, and optionally an impact modifier (S). It also relates to a process comprising, in a first stage, forming a homogeneous solution of precursor of the nodules in the thermoplastic (M) in the molten state, in a second stage, introducing the initiator while remaining at a temperature below which the initiator becomes active, and, in a third stage, heating to a temperature sufficient to cause crosslinking of the precursor and to form rigid nodules while kneading the composition, the impact modifier being introduced during the first or the second stage.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: October 8, 2002
    Assignee: Atofina
    Inventors: Denis Bertin, Alain Bouilloux, Laurent Teze, Thierry Vivier
  • Methylmethacrylate/acrylic acid copolymer antinoise sheets
    Patent number: 6462157
    Abstract: Antinoise and flame-resistant barriers formed by supports and by sheets fixed thereon, characterized by the fact that the sheets consist of a methylmethacrylate copolymer and acrylic acid comprised between 1 and 20% by weight.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: October 8, 2002
    Assignee: Atofina
    Inventors: Alberto Luca Stasi, Fabio Giberti, Cristiano De Marco