Patents Assigned to Atochem
  • Cross-linkable fluorinated copolymer, process for its manufacture and its application in protective coatings
    Patent number: 5079320
    Abstract: A cross-linkable copolymer formed by polymerizing in solution vinylidene fluoride, tetrafluoroethylene, an allyl ether, and a vinyl ether and protective coating prepared utilizing such copolymer.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: January 7, 1992
    Assignee: Atochem
    Inventors: Patrick Kappler, Jean-Luc Perillon
  • Process for preparing a catalyst component, resultant catalyst system, and process for synthesis of polymers
    Patent number: 5075270
    Abstract: A process for preparing a transition metal component for a catalyst system wherein a specified aluminosiloxane derivative is reacted with a monohalopenated, alkylated, or alkoxylated compound of magnesium and the reaction product is chlorinated and reacted with a transition metal; a catalyst system comprising such transition metal component and a cocatalyst selected from organometallic compounds of a metal of Groups I through III of the Periodic Table; and the process of synthesizing olefin homopolymers and copolymers utilizing such catalyst system.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: December 24, 1991
    Assignee: Atochem
    Inventors: Claude Brun, Jean-Loup Lacombe
  • Process for the preparation of expandable polymer beads and materials derived therefrom
    Patent number: 5071882
    Abstract: The polymerization in aqueous suspension of at least one vinylaromatic monomer is carried out in the presence, relative to the vinylaromatic monomer, of approximately 0.01% to 0.06% by weight of at least one polyethylene wax and of approximately 0.005% to 0.1% by weight of at least one nonionic surface-active agent which has an HLB value of between 7 and 16.Materials obtained from expandable beads prepared according to this polymerization process.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: December 10, 1991
    Assignee: Atochem
    Inventor: Hugues Godfrin
  • Microcapsule for use in making carbonless transfer paper
    Patent number: 5071707
    Abstract: Microcapsules containing a color-forming material and a solvent therefor, the solvent being a mixture of certain oligomeric isomers of benzylcumene and its higher homologues and a mixture of isomers of bis(isopropylphenyl) phenylmethane.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: December 10, 1991
    Assignee: Atochem
    Inventors: Raymond Commandeur, Bernard Gurtner
  • Sulfide antioxidants for stabilizing crosslinked polyolefins
    Patent number: 5070124
    Abstract: The present invention is a composition comprising crosslinked polyolefin resins and an amount of organic sulfide antioxidants sufficient to stabilize the resin against thermal or oxidative degradation, wherein the organic sulfide antioxidant is represented by Formula I, II or III ##STR1## wherein m, n, R, R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are as set forth in the Summary of the Invention.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: December 3, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Joseph M. Bohen, James L. Reilly
  • Snow ski soles
    Patent number: 5069976
    Abstract: Improved snow ski and other soles (bases), having enhanced and durable wax absorption, are fabricated from a sheet or film of a thermoplastic polymeric material based on an intimate admixture of one or more polyolefins, e.g., high density polyethylene, and one or more polyetheresteramides.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: December 3, 1991
    Assignee: Atochem
    Inventors: Michel Vuachet, Jean-Marie Huet
  • Hindered phenolic N-(amido)imides
    Patent number: 5068356
    Abstract: Phenolic N-(amido) imides are provided which are useful as antioxidant stabilizers for organic materials, including a large variety of synthetic polymers, typically subject to thermooxidative degradation. The antioxidant effectiveness of the phenolic N-(amido)imide stabilizers is enhanced by the deactivating potential of the amido-imide moiety towards metals or metal ions that frequently contaminate polymer compositions and serve to catalyze thermal degradation.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: November 26, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Jerome Wicher
  • Process for the preparation of alkane- and arenesulfonamides
    Patent number: 5068427
    Abstract: A process for the preparation of alkane- and arenesulfonamides in high purity and yield is provided. Ammonia or alkylamine is reacted under boiling conditions with an alkane- or arenesulfonyl halide in the absence of an added solvent. The heat of reaction is dissipated by the heat of vaporization of the ammonia or alkylamine.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: November 26, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Stanley R. Sandler, Steven G. Schon, David M. Gardner
  • Polysilazane ceramic precursors and ceramic shaped articles produced by pyrolysis thereof
    Patent number: 5066734
    Abstract: Polysilazane-based ceramic precursor compositions, well adapted for high yield pyrolytic conversion into ceramic shaped articles, include a polysilazane component derived from ammonia and a polysilazane component derived from a hydrazine.
    Type: Grant
    Filed: December 7, 1989
    Date of Patent: November 19, 1991
    Assignee: Atochem
    Inventor: Christian Colombier
  • Polyfluoroalkyl acetates, thioacetates and acetamides, and their applications
    Patent number: 5066672
    Abstract: The invention relates to compounds of the polyfluoroalkyl acetate, thioacetate or acetamide type, which can be denoted by the general formula: ##STR1## in which Rf denotes a perfluoroalkyl radical, m is an integer ranging from 1 to 4, Q denotes an oxygen or sulphur atom or an NH group, X.sup.- denotes an anion, R.sub.1 denotes an alkyl radical containing from 1 to 3 carbon atoms, R.sub.2 denotes the allyl radical or an alkyl radical containing from 1 to 18 carbon atoms, and R.sub.3 denotes an alkyl radical containing from 7 to 18 carbon atoms or one of the following radicals: ##STR2## wherein n is an integer from 2 to 4, R is hydrogen or methyl, and Y denotes C.sub.2 -C.sub.8 alkylene bridge optionally interrupted by an oxygen atom.These compounds can be used as surface-active agents or an monomers for developing artificial vesicles.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: November 19, 1991
    Assignee: Societe Atochem
    Inventors: Alain Sismondi, Parfait Abenin, Aime Cambon
  • Hot melt adhesive of hydroxyl-functional ethylene-vinyl acetate and blocked polyisocyanate
    Patent number: 5064902
    Abstract: A composition for a cross-linkable hot melt adhesive is provided and is formed by an ethylene-vinyl acetate copolymer containing primary hydroxyl functions and a blocked polyisocyanate. This composition when associated with a tackifying resin which can also serve as blocking agent of the polyisocyanate, is a cross-linkable hot melt adhesive. The adhesive is used at a temperature at least equal to splitting temperature of the isocyanate functions of the polyisocyanate. The temperature at which such adhesives retain adherence can reach about 200.degree.-220.degree. C.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: November 12, 1991
    Assignee: Atochem
    Inventors: Jacques Boutillier, Noelle Forichon, Yves Lermat
  • Synthesis of perfluoroalkyl bromides
    Patent number: 5057633
    Abstract: The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes C.sub.n F.sub.2n+1 -Br (n=1 to 20).A perfluoroalkanesulphonyl chloride C.sub.n F.sub.2n+1 -SO.sub.2 Cl is reacted with a compound of formula: ##STR1## in which X represents a nitrogen or phosphorus atom and R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be identical or different, each represent an optionally substituted hydrocarbon radical, it also being possible for one of these symbols to be a hydrogen atom.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: October 15, 1991
    Assignee: Societe Atochem
    Inventors: Gilles Drivon, Pierre Durual, Elie Ghenassia
  • Agent for rendering compatible at least two incompatible thermoplastic polymers, process for the preparation and thermoplastic alloys obtained therefrom
    Patent number: 5055521
    Abstract: An agent is provided which renders compatible at least two incompatible thermoplastic polymers. The agent contains one di- or trisequenced copolymer comprising at least one N-vinyl-pyrrolidone or methyl (meth) acrylate telomer and one mono- or difunctional oligomer selected from the group consisting of an ethylenically unsaturated polymerizable monomer, or a polycondensable monomer, or a lactam. The agent is prepared by condensation of the telomer with the oligomer and is used in the preparation of alloys of incompatible thermoplastic polymers.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: October 8, 1991
    Assignee: Atochem
    Inventors: Roland Parsy, Nadine Rivas
  • Procedure for gas-phase polymerication of ethylene allowing the fabrication of linear polyethylene with a narrow molecular-weight distribution
    Patent number: 5055535
    Abstract: A process for the manufacture of a linear polyethylene with narrow molecular-weight distribution comprising polymerizing ethylene alone or a mixture of ethylene and an alpha-olefin in which ethylene represents at least about 70% by weight of the total monomers involved, in a gas-phase polymerization medium in the presence of a catalytic component containing at least one transition metal, magnesium, and a halogen, a co-catalyst comprising an alkylaluminum compound, and a monoether, the monoether having the general formula R'OR", wherein R' and R" are the same or different and each is a C.sub.1 to C.sub.8 linear or branched hydrocarbon radical or being a cyclic monoether with the oxygen forming a ring having 4 to 12 carbon atoms.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: October 8, 1991
    Assignee: Atochem
    Inventors: Roger Spitz, Claude Brun, Jean-Francois Joly
  • Synthesis of 1,1-dichloro-1,2,2,2-tetrafluoroethane
    Patent number: 5055624
    Abstract: The invention relates to the selective manufacture of 1,1-dichloro-1,2,2,2-tetrafluoroethane by catalytic fluorination of 1,1,1-trichloro-2,2,2-trifluoroethane with anhydrous hydrofluoric acid.The reaction is carried out in the liquid phase at a temperature of between 70.degree. and 170.degree. C. and under a pressure of between 10 and 80 bars absolute, in the presence of an antimony-containing catalyst.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: October 8, 1991
    Assignee: Atochem
    Inventors: Andre Lantz, Bernard Cheminal
  • Method for dewaxing oil and gas pipelines or wells
    Patent number: 5053149
    Abstract: A process for dissolving wax, paraffin and/or sulfur deposits in an oil or gas pipeline or well comprises providing at the site of the deposit an acid and a compound which liberates carbon disulfide upon contact with the acid, whereby the deposit is dissolved by the liberated carbon disulfide.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: October 1, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Paul J. McElligott, Jr., Stanley R. Sandler, John F. Kennoy, William J. Tuszynski
  • Oxychlorination of hydrocarbons
    Patent number: 5053567
    Abstract: Chlorinated hydrocarbons, e.g., 1,2-dichloroethane, are prepared by heterogenously oxychlorinating a hydrocarbon with an oxygen-containing gas and gaseous hydrochloric acid in a fluidized bed containing admixture of (i) a catalytically effective amount of an oxychlorination catalyst, (ii) diluent particles of at least one catalytically and chemically inert solid material, and (iii) copper powder or a powdered copper compound.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: October 1, 1991
    Assignee: Atochem
    Inventors: Yves Correia, Jean Lesparre, Alain Petit
  • Selective hydrogenolysis of perhalogenated ethane derivatives
    Patent number: 5053564
    Abstract: The invention relates to the manufacture of chlorofluoroethanes of formula CF.sub.3 --CHF.sub.x Cl.sub.2-x, where x is equal to 0 or 1, by the catalytic hydrogenation of a perhaloethane of formula: CF.sub.3 --CF.sub.x Cl.sub.3-x. The use of a ruthenium-based catalyst deposited on a support enables the selectivity to be improved.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: October 1, 1991
    Assignee: Societe Atochem
    Inventors: Bernard Cheminal, Jean-Marie Cognion, Dominique Guillet
  • Antioxidant-peroxides
    Patent number: 5051531
    Abstract: The present invention relates to a novel antioxidant-peroxide compound of Structure A,(Y--[R--OO--X).sub.x --An].sub.y Ain which the definitions of X, Y, R, An, x, and y are given in the Summary of the Invention section, for example, t-butyl peroxy-3-(3,5-di-t-butyl-4-hydroxypheneyl) propionate, processes for producing polymeric composition of enhanced oxidative stability via initiation of polymerization of ethylenically unsaturated monomers, curing of elastomers and unsaturated polyester resins, modification of polypropylene and other polymers and copolymers, and crosslinking of olefin polymers and copolymers, and the resulting polymers having enhanced oxidative stability.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: September 24, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Jose Sanchez
  • Process of forming a stable colloidal dispersion
    Patent number: 5051205
    Abstract: A method is disclosed to prepare a uniform, stable dispersion of an additive amount of a water-insoluble, high viscosity liquid polyalkylene glycol derivative in a substantially nonaqueous, water-soluble alkanolamine by combining under pressure a proportionate amount of the total polyglycol derivative to be added to the alkanolamine component, or mixture of alkanolamine and polyglycol derivative, subjecting the mixture to shear stress, and repeating the procedure until a uniform colloidal dispersion is obtained of the alkanolamine containing the desired additive amount of polyglycol derivative.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: September 24, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Thomas H. Overgaard, Gregory J. Cutting