Patents Assigned to Atochem
  • Surface modified, U.V. stabilized, polyvinyl chloride article
    Patent number: 5185191
    Abstract: A surface modified, U.V. stabilized opaque polyvinyl chloride resin article and process for making same is described. The article includes a white pigment, such as titanium dioxide, in low amounts. The modified surface is substantially free of residual stabilizer and solvent, and its appearance and degree of surface perfection is substantially the same as an unmodified side of the article.The process of the invention is characterized by the steps of immersing the polyvinyl chloride article is immersed in a suitable liquid media, then contacted with a solution of an ultraviolet light stabilizer in a suitable organic solvent, and residual stabilizer and solvent are displaced in situ, i.e. in a non-evaporative environment without contacting the air.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: February 9, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Joseph Silbermann, Michael T. Burchill
  • Catalyst and process for the production of 3-cyano-3,5,5-trialkylcyclohexanone
    Patent number: 5183915
    Abstract: The production of 3-cyano-3,5,5-trialkylcyclohexanone from the reaction of 3,5,5-trialkylcyclohexenone and hydrocyanide at elevated temperature and in the presence of a catalytic amount of an onium cyanide, is disclosed herein.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: February 2, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Christian Forguy, Frederick J. Goetz, Edward L. Graeber, Michael J. Lindstrom
  • Low haze transparent compositions and processes for preparing them
    Patent number: 5183851
    Abstract: This invention relates to low haze impact-resistant transparent compositions, comprising:(a) 40-99% by weight of a thermoplastic resin based on homopolymers and/or copolymers of alkyl-methacrylates with minor amounts of alkyl-acrylates, wherein the alkyl group contains from 1 to 8 carbon atoms, and(b) 60-1% by weight of a polymer having a multi-layer structure, based on elastomers arranged sequentially to thermoplastic resins as defined in step (a).
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: February 2, 1993
    Assignee: ELF Atochem Italia S.r.l.
    Inventors: Francesco Visani, Carlo Tavazzani, Giuseppe Ajroldi, Giovanni Castiglioni
  • Separation of isomers, e. g., phenethyl bromide from 1-phenyl-1-bromoethane
    Patent number: 5181992
    Abstract: Mixtures of isomers, e.g., mixtures of phenethyl bromide and 1-phenyl-1-bromoethane, are separated by (a) selectively condensing one such isomer with an aromatic compound bearing at least one aryl (nuclear) hydrogen atom, e.g., xylene, in the presence of a catalytically effective amount of a Friedel-Crafts catalyst, e.g., ferric chloride, and then (b) separating the product of condensation, e.g., phenylxylylethane, from the unreacted isomer.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: January 26, 1993
    Assignee: Atochem
    Inventors: Raymond Commandeur, Gilles Drivon, Elie Ghenassia
  • Compositions containing ethylene copolymers and resultant products
    Patent number: 5180783
    Abstract: Compositions containing at least 60% by weight of at least one copolymer (A) of ethylene and at least one alpha-olefin with 3 to 10 carbon atoms, and no more than 40% by weight of at least one copolymer (B) based on ethylene and at least one anhydride of an unsaturated dicarboxylic acid, characterized in that:(i) copolymer (A) has a density between 0.850 and 0.890,(ii) copolymer (B) contains at least 80 mol-% of units derived from ethylene and at least 0.1 mol-% of units derived from the anhydride of an unsaturated dicarboxylic acid, and(iii) at least one of copolymers (A) and (B) is modified by means of an effective amount either of a free-radical initiator if the modification involves copolymer (A), or of at least one compound capable of reacting with the anhydride functions of copolymer (B).
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: January 19, 1993
    Assignee: Atochem
    Inventors: Brigitte Seguela, Patrick Kaifasz
  • Coextruded multilayer and a process for preparing the same
    Patent number: 5180634
    Abstract: Coextruded multilayer sheets comprising a first outer layer consisting of a blend containing polyvinylidene fluoride having an average mollecular weight (Mw) not higher than 250,000 and an acrylic resin and at least a layer of a homo or copolymer of an alkylmethacrylate, having a Vicat degree (49N, 50.degree. C/h) of at least 90.degree. C., in mixture with 5-40% by weight of an elastomer in the grafted form.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: January 19, 1993
    Assignee: Elf Atochem Italia S.r.l.
    Inventors: Carlo Sempio, Andrea Anghileri, Marc Binaghi, Tullo Ronchetti, Italo Vailati
  • Stabilized 141b
    Patent number: 5177270
    Abstract: Compositions of 141b which are stabilized with 4-benzyloxyphenol or 2,6-di-t-butyl-4-methylphenol.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: January 5, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh
  • Powder coatings of vinylidene fluoride/hexafluoropylene copolymers
    Patent number: 5177150
    Abstract: A pigmented powder coating composition comprises:(a) a resin component comprising (1) from about 50 wt. % to about 90 wt. % VDF/HFP copolymer resin having a melt viscosity of from about 1 to about 4 kilopoise measured at 100 sec.sup.-1 and 232.degree. C., and (2) from about 10 wt. % to about 50 wt. % of at least one thermoplastic acrylic resin, and(b) a pigment component comprising from about 5 to about 30 parts of at least one pigment, per 100 parts by weight of the resin component.The powder coating composition is prepared by pelletizing the mixture components, cryogenically grinding the pellets, and classifying the particles. The composition is applied to a substrate, and subjected to heat treatment to form a coating. The coatings prepared in this manner are characterized by improved flexibility, crack resistance and surface smoothness.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: January 5, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventor: Michael D. Polek
  • Production of vinylidene fluoride
    Patent number: 5177271
    Abstract: Production of vinylidene fluoride by contacting 143a and HCl in the gas phase at 300-700 C.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: January 5, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Maher Y. Elsheikh, Michael S. Bolmer
  • Protection of lead-containing anodes during chromium electroplating
    Patent number: 5176813
    Abstract: The present invention provides a process for electroplating chromium using lead anodes while achieving the advantages of using methanesolfonic acid without suffering the excessive anode-corrosion characteristics associated with that acid. Accordingly, chromium is electrodeposited from a bath containing chromic acid, sulfate and an alkylpolysulfonic acid containing from one to about three carbon atoms. The invention also provides a plating process for chromium electrodeposition, a plating bath for use in the inventive process, and a replenishment composition for existing plating baths.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: January 5, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventor: Kenneth R. Newby
  • Process for producing alkylthio- and arylthio-substituted carboxylic acids and their thioesters
    Patent number: 5175310
    Abstract: A process is provided for producing alkylthio-substituted carboxylic acids and arylthio-substituted carboxylic acids and their corresponding alkylthio-substituted thioesters and arylthio-substituted thioesters. The process comprises reacting a mercaptan with a lactone in the presence of an acidic catalyst at temperatures of about 100.degree. C. to about 350.degree. C. The process for preparing the thio-substituted carboxylic acids and thio-substituted thioesters may be a continuous process or a batch process.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: December 29, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Michael J. Lindstrom, Bernard Buchholz, Robert B. Hager
  • Hardenable, fluorinated copolymer process for its manufacture and its application in varnishes and paints
    Patent number: 5173555
    Abstract: A hardenable fluorinated copolymer of fluorinated monomers and an acrylamide derivative and paints, paints and varnishes comprising such copolymers, and the process of making such hardenable copolymer.
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: December 22, 1992
    Assignee: Atochem
    Inventors: Patrick Kappler, Jean-Luc Perillon
  • Polyphenylmethane heat-sensitive recording media
    Patent number: 5173477
    Abstract: Novel heat-sensitive recording media include a support substrate, e.g., paper or a synthetic polymer film, having a thermosensitive recording layer deposited thereon, such thermosensitive recording layer comprising a colorant precursor, a heat-sensitive developer therefor and at least one polyphenylmethane of the formula (A1): ##STR1## in which R.sub.1 and R.sub.2, which may be identical or different, are each a halogen atom, NO.sub.2, CN, OCH.sub.3, H or an alkyl radical having up to 5 carbon atoms; n is 3, 4 or 5; p is 1, 2 or 3; g is 0 or 1 and the maximum value of p+g is 2; and the melting point of which polyphenylmethane being at least 50.degree. C.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: December 22, 1992
    Assignee: Societe Atochem
    Inventors: Raymond Commandeur, Jean-Pierre Sarron
  • Multilayer polymer materials with barrier properties
    Patent number: 5171640
    Abstract: Multilayer polymer material with barrier properties containing a layer (a) of a polymer with barrier properties and a layer (b) of copolymer of styrene and maleic anhydride.The polymer of layer (a) is a copolymer of ethylene and vinyl alcohol and the said material also has a lyer (c) of a copolymer of ethylene containing units derived from an unsatured dicarboxylic acid anhydride and layer (c) is in contact with layer (a).
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: December 15, 1992
    Assignee: Atochem
    Inventor: Rene Wirth
  • Process for the manufacture of benzyl methacrylate and its derivatives which are halogenated or alkylated on the aromatic nucleus
    Patent number: 5169980
    Abstract: This process for the manufacture of benzyl methacrylate and of its halogenated or alkylated derviatives by the reaction of benzyl chloride or of one of its halogenated or alkylated derivatives with an alkali metal methacrylate is characterized in that the reaction is carried out in the presence of not more than 3 mol %, based on the benzyl chloride or a derivative, of a tertiary amine. The alkali metal is chosen especially from lithium, potassium and sodium. The tertiary amine is preferably a tertiary diamine of general formula: ##STR1## in which n is an integer ranging from 1 to 10 and R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are identical or different, are alkyl, cycloalkyl or aryl radicals containing from 1 to 12 carbon atoms, functionalized if appropriate and, if appropriate, such that they form a heterocyclic ring with the nitrogen atom(s) carrying them.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: December 8, 1992
    Assignee: Elf Atochem S.A.
    Inventors: Didier Vanhoye, Paul Grosius, Patrice Hurtel
  • Stabilized 141b
    Patent number: 5169996
    Abstract: HCFC blowing agents such as 141b which are stabilized with diethylhydroxylamine, 1,4-benzoquinone, or 2,6-di-t-butylbenzoquinone.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: December 8, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, Robert B. Hager
  • Stabilized 141b
    Patent number: 5169874
    Abstract: HCFC blowing agents such as 141b which are stabilized with alpha-pinene oxide, limonene dioxide, or 1,2-hexadecene oxide.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: December 8, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh, John A. Murphy
  • Antistatic surface modification of PVC
    Patent number: 5169688
    Abstract: At least one antistatic agent is incorporated into a thermoplastic polymer by contacting a polyvinyl chloride polymer with a solution comprising a solvent capable of swelling the PVC surface and at least one antistatic agent selected from the group consisting of 1-dodecylpyridinium chloride monohydrate and (R.sup.1).sub.n (R.sup.2).sub.m ammonium halide, wherein n and m are integers of from 0-4 and n+m=4, and wherein R.sup.1 and R.sup.2 can be different or the same and are alkyl groups of from 1 to 20 carbon atoms.
    Type: Grant
    Filed: February 27, 1991
    Date of Patent: December 8, 1992
    Assignee: Atochem North America, Inc.
    Inventors: Dana S. Garcia, Joseph Silbermann
  • Naphthyloxybenzoic and naphthloxynaphthoic acid compounds
    Patent number: 5169978
    Abstract: Novel (naphthyloxy)benzoic/naphthoic acid compounds, polymerizable into thermotropic polymers have the formulae: ##STR1## in which R is hydrogen, a straight or branched chain aliphatic or cycloaliphatic hydrocarbon radical having from 1 to 4 carbon atoms or a radical ##STR2## wherein R' is a methyl or ethyl radical, or salt thereof.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: December 8, 1992
    Assignee: Societe ATOCHEM
    Inventor: Jean-Philippe Gillet
  • Stabilized 1,1-dichloro-1-fluoroethane
    Patent number: 5169997
    Abstract: HCFC blowing agents such as 141b which are stabilized with halogen-containing inhibitors such as benzyl bromide.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: December 8, 1992
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh