Patents Assigned to Atochem
  • Process for impregnation of electrical capacitors
    Patent number: 6154357
    Abstract: The invention relates To a process for the impregnation of electrical capacitors which includes performing the impregnation of the coil winding with a dielectric fluid, eliminating the excess of the dielectric fluid, filling the casing containing the impregnated coil winding with a gelable composition and the dielectric fluid for impregnating the coil winding and gelling the gelable composition.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: November 28, 2000
    Assignee: Elf Atochem S.A.
    Inventor: Noelle Berger
  • Modified porous silica, process for its manufacture and its use in paints and as a carrier pigments and dyes
    Patent number: 6146762
    Abstract: The invention relates to porous silicas in which the pores are at least partially filled with polyamide resins. They can be employed as additives to liquid paints, as carriers for pigments and/or dyes, as antiblocking agents for folded or wound films made of olefinic material and in cosmetic, pharmaceutical and/or dermatological compositions.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: November 14, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Bruno D'Herbecourt, Yves Lermat, Michael Werth, Olivier Julien
  • Adhesive bonding agent for PVDF, its application as barrier material and material obtained from the latter
    Patent number: 6143415
    Abstract: The invention relates to a bonding agent for PVDF, containing alkyl (alkyl)acrylate units and units bearing a carboxylic acid functional group. This bonding agent, containing PVDF, forms a barrier to hydrocarbons. The invention also relates to the material including the present bonding agent, especially petrol pipes including polyamide and the present bonding agent, in conjunction with PVDF.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: November 7, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Serge Lorek, Philippe Bussi, Philippe Renouard
  • 142b/124 blowing agent blends
    Patent number: 6136877
    Abstract: Nonflammable foam blowing agent blends of 142b or 124 are provided, as are polyol premixes and polyurethane foam compositions containing such blends.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: October 24, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventor: Jinhuang Wu
  • Multiphase thermoplastic compositions
    Patent number: 6136920
    Abstract: The present invention relates to a multiphase thermoplastic composition consisting of a mixture (I) including at least one ethylene polymer (A) which has units derived from unsaturated epoxy and at least one thermoplastic resin (B) partly encapsulated by the said ethylene polymer (A), the said mixture (I) being dispersed in a matrix of thermoplastic resin (C).
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: October 24, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Marius Hert, Patrice Perret
  • Vulcanized rubbers modified by thermoplastics
    Patent number: 6133375
    Abstract: The present invention relates to a vulcanized mixture:(i) of at least one functionalized rubber and(ii) of at least one thermoplastic in an amount which is sufficient to increase the modulus at small elongations but such that the breaking stress is not reduced by more than 10%.The thermoplastic can be chosen from polyamides and copolymers containing polyamide blocks and polyether blocks.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: October 17, 2000
    Assignee: Elf Atochem, S.A.
    Inventors: Isabelle Betremieux, Patrick Alex, Philippe Marcq, Christian Dousson
  • Multiphase thermoplastic resin compositions
    Patent number: 6127456
    Abstract: The invention relates to a thermoplastic composition comprising at least one polymer (M) forming a matrix in which are dispersed nodules of at least one polymer (K) which are encapsulated in at least one polymer (S) in such a way that these encapsulated nodules are smaller than the nodules of the polymer (S) which are dispersed in the matrix (M).
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: October 3, 2000
    Assignee: Elf Atochem SA
    Inventors: Thibaut Montanari, Chrystelle Guibouin, Marius Hert, Patrice Perret, Jacques Thomasset
  • Process for the purification of virtually anhydrous organic liquids
    Patent number: 6123850
    Abstract: The subject matter of the present invention is a process for the purification of a virtually anhydrous organic liquid other than DMSO alone, in order to decrease its content of alkali and alkaline-earth metal and metal cations, characterized in that it consists essentially in placing this organic liquid in contact with one or more cation exchange resins and in then separating from the resin(s) the purified organic liquid, said resin or at least one of said resins being a sulphonic resin in --SO.sub.3 H or --SO.sub.3 NH.sub.4 form based on a polystyrene-divinylbenzene copolymer having a divinylbenzene content of from 50 to 60% by weight, without taking the sulphonic groups into account.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: September 26, 2000
    Assignee: Elf Atochem
    Inventors: Annie Commarieu, Francis Humblot
  • 1234ze preparation
    Patent number: 6124510
    Abstract: Preparation of cis/trans 1234ze monomer is provided, by dehydrofluorination of 245fa using an alkaline solution or using a gas phase catalyzed process.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: September 26, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Maher Y. Elsheikh, Paul D. Fellenger
  • Metal containing e-coat catalysts optionally with tin catalysts
    Patent number: 6124380
    Abstract: The invention comprises a curable composition comprising: (i) a blocked reactive component wherein the blocked reactive component is a blocked isocyanate or a blocked isothiocyanate; (ii) a functional compound reactive with the blocked reactive component, the functional compound containing reactive hydrogen; (iii) a catalyst for promoting the reaction of the reactive component with the blocked functional compound, wherein said catalyst is based on the reaction product of manganese, cobalt, nickel, copper, zinc, germanium, antimony, or bismuth, or the oxides thereof with a mercaptan, or an organic acid, wherein said organic acid is hexanoic, oxalic, adipic, lactic, tartaric, salicylic, thioglycolic, succinic, or mercapto succinic acid, or the reaction product of copper or germanium, or the oxides thereof with a lower aliphatic acid.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: September 26, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Emily C. Bossert, Kevin Cannon, William D. Honnick, Wayne Ranbom
  • Polyamide-based coating powders
    Patent number: 6123987
    Abstract: Pulverulent coating compositions exhibiting excellent adhesion to metal substrates are formulated from a polyamide, e.g., nylon 6, nylon 11, nylon 12, or copolyamide thereof, and minor amounts of at least one phenolic polycondensate and/or at least one polyalkyl (meth)acrylate.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: September 26, 2000
    Assignee: Elf Atochem S.A.
    Inventor: Pierre Lescaut
  • Passivation of stainless steels in organosulphonic acid medium
    Patent number: 6120619
    Abstract: To avoid the corrosion of stainless steels in organosulphonic acid medium, at least one oxidizing agent selected from cerium(IV), iron(III), molybdenum(VI) or vanadium(V) oxides or salts, nitrites and persulphates, is added to the medium in an amount which is sufficient to place the spontaneous potential between the passivation and transpassivation potentials.
    Type: Grant
    Filed: January 12, 1999
    Date of Patent: September 19, 2000
    Assignee: Elf Atochem, S.A.
    Inventors: Jean Goudiakas, Guy Rousseau
  • Flexible thermoplastic resins with improved tensile strength
    Patent number: 6121374
    Abstract: The invention relates to a thermoplastic composition comprising at least one polymer (M) forming a matrix in which are dispersed at least one polymer (S) and at least one polymer (K) and such that its tensile strength is greater than that of a composition comprising only (M) and (S), the proportion by weight of (M) being the same.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: September 19, 2000
    Assignee: Elf Atochem SA
    Inventors: Thibaut Montanari, Chrystelle Guibouin, Marius Hert, Patrice Perret, Jacques Thomasset, Didier Roumilhac
  • Strengthening flat glass by edge coating
    Patent number: 6120908
    Abstract: A method is described for strengthening or restoring strength to a flat brittle oxide substrate which includes the steps of coating the edges of the brittle oxide substrate with a strengthening composition without coating a significate portion of the flat surfaces. The strengthen brittle oxide substrate such as glass and a window containing as the window pane the edge strengthen glass are also provided.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: September 19, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Victor D. Papanu, Stephen W. Carson, Scott J. Schwartz
  • Thermoplastic resin composition
    Patent number: 6120790
    Abstract: Purpose: the purpose of the present invention is to offer resin compositions which have antimicrobial/fungistatic properties which show outstanding dispersion and outstandingly durable performance. Constitution: thermoplastic resin compositions characterized in that an antimicrobial/fungistatic agent, and particularly an inorganic antimicrobial/fungistatic agent, is compounded with a copolymer containing a polyether chain as a constituent unit, such as a polyether/polyamide copolymer, a polyether/polyester copolymer or a polyether urethane, for example, at 0.05-20 wt. %, and thermoplastic resin compositions which comprise a thermoplastic resin, an antimicrobial/fungistatic agent and a copolymer having a polyether chain as a constituent unit.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: September 19, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Takatoshi Kuratsuji, Jerome Maillet, Yoshiyuki Miyaki
  • 142b/124 blowing agent blends
    Patent number: 6117914
    Abstract: Nonflammable foam blowing agent blends of 142b or 124 are provided, as are polyol premixes and polyurethane foam compositions containing such blends.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: September 12, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventor: Jinhuang Wu
  • Mixture of polyolefin and of polyamide alloy and method for producing it
    Patent number: 6117561
    Abstract: There is provided a mixture comprising: (i) a matrix A comprising a polyolefin (A1) and/or a functionalized polyolefin (A2); and (ii) a dispersed phase comprising an alloy B of polyamide (B1) having a polyamide matrix, comprising for example a polyamide (B1), a functionalized polyolefin (B2) and optionally a polyolefin (B3). A method for producing same is disclosed and comprises mixing the constituents of matrix A and a ground product of a multi-layer film comprising at least one layer of alloy B.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: September 12, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Regis Jacquemet, Jean-Claude Jammet, Marie-Pierre Corbic-Bellinger, Dominique Basset, Bruno Echalier
  • Blowing agent blends and use thereof
    Patent number: 6117917
    Abstract: B-side compositions comprising a polyol and a gaseous blowing agent comprising 124 dissolved in the polyol are provided, as are processes for producing closed-cell polyurethane or polyisocyanurate polymer foam comprising contacting an isocyanate-containing component with a polyol component in the presence of a blowing agent comprising 124, said blowing agent being dissolved in said polyol component.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: September 12, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventor: Arnaud Albouy
  • Method for producing coagulated polymer latex particles
    Patent number: 6114415
    Abstract: A batchwise or continuous process for producing coagulated particles of polymer latex, involves partially or completely filling at least one receptacle with a fluid A which can be water, a polymer latex emulsion or a coagulant solution, the receptacle being equipped with baffles containing at least one orifice, injecting into the receptacle at least one fluid other than the fluid of the preceding stage, the injected fluid being a polymer latex emulsion and/or a coagulant solution, and in then creating and maintaining within the receptacle an oscillatory flow or an impulsive flow, in conjunction with the formation of eddies or of vortices.
    Type: Grant
    Filed: June 3, 1998
    Date of Patent: September 5, 2000
    Assignee: Elf Atochem, S.A.
    Inventors: Chris Bertelo, Laurent Gervat, Jerome Laffont, Malcolm Robert Mackley, Gilles Meunier
  • Flexible coatings with low surface tack and surface tension
    Patent number: 6114045
    Abstract: The invention relates to the films obtained by applying and drying a latex based on special acrylic monomers. These coatings are both flexible and have low surface tack and surface tension. The low tack and hydrophobic nature are provided by the special acrylic monomers. The field of application of the invention is that of the surface coatings industry.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: September 5, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Didier Juhue, Baudouin Duque