Patents Assigned to Atochem
  • Hot melt adhesive compositions
    Patent number: 5994437
    Abstract: The invention is a thermofusible adhesive composition comprising:a at least one essentially amorphous poly(alpha-olefin),b at least one copolymer of ethylene and an alkyl (meth)acrylate, the cloud point being below 170.degree. C.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: November 30, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Jean Lebez, Jean-Michel Pierrot, Eric Radigon
  • Process for the purification of chlorinated aromatic hydrocarbons
    Patent number: 5993607
    Abstract: In a process for the purification by distillation of chlorinated aromatic hydrocarbons originating from the chlorination of aromatic hydrocarbons in the presence of FeCl.sub.3, the crude reaction product is first partially degassed and then directly subjected to distillation in the presence of said FeCl.sub.3.
    Type: Grant
    Filed: April 10, 1998
    Date of Patent: November 30, 1999
    Assignee: Elf Atochem, S.A.
    Inventors: Raymond Commandeur, Dominique Audoux
  • Mixtures of bitumen, of powdered rubber waste and of polymer, employed as road binder
    Patent number: 5990207
    Abstract: The present invention relates to mixtures of bitmen, of powdered rubber waste and of at least one copolymer (A) of an alpha-olefin and of at least one unsaturated epoxide, such that:the Brookfield viscosity at 180.degree. C. according to NFT Standard 76102 (27 needle) is lower than 1150 mPa s;the difference in absolute value of the softning points (ring-and-ball temperature) according to NFT 66008 between the top and bottom fractions of a mixture stored for 3 days at 180.degree. C. in a vertical tube is smaller than or equal to 5.degree. C. These mixtures are useful as road binders.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: November 23, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Patrice Perret, Jean Lebez, Guillaume Montignac
  • Stripping composition based on water and anisole
    Patent number: 5990063
    Abstract: The present invention is related to a stripping composition for paints, varnishes or lacquers. This composition contains at least water and anisole.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: November 23, 1999
    Assignee: Elf Atochem S.A.
    Inventor: Jean-Pierre Lallier
  • Composition based on high molecular weight organotin maleates which can be used to stabilize thermoplastic polymers, process for producing the said compositions
    Patent number: 5985967
    Abstract: The invention relates to a composition containing high molecular weight organotin maleates as obtained by reacting a high molecular alcohol or epoxyalkane with maleic anhydride and by then bringing the mixture thus obtained into contact with a dialkyltin oxide.The invention also relates to the poly(vinyl chloride) (PVC) compositions stabilized using the said composition based on high molecular weight organotin maleates and also to the extruded rigid items formed from the said PVC compositions.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: November 16, 1999
    Assignees: Elf Atochem North America Inc., Elf Atochem S.A.
    Inventors: Muriel Cuilleret, Patrick Morel, James L. Reilly, Peggy S. Schipper
  • Composition including a fluoroelastomer and a thermoplastic polyamide and resulting film
    Patent number: 5986005
    Abstract: The present invention relates to a modifier composition, a stock mixture and a final composition comprising a fluoro elastomer and a thermoplastic polyamide, as well as to the film obtained from the final composition.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: November 16, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Regis Jacquemet, Jean-Jacques Labaig, Joachim Merziger
  • Blends of thermoplastic and rubber which are adherent to thermoplastics
    Patent number: 5985392
    Abstract: Composite including a rubber/thermoplastic blend adherent by itself to a thermoplastic material; the blend is in the form of a thermoplastic matrix containing rubber nodules functionalized and vulcanized during the mixing with the thermoplastic. Composite articles obtained by overmoulding the vulcanized rubber/thermoplastic blend onto the thermoplastic.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: November 16, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Marius Hert, Patrick Alex, Martine Cerf, Christian Dousson
  • Multilayer films which can be welded by high frequency
    Patent number: 5985390
    Abstract: The invention relates to a multilayer film, which is useful for making flexible sachets, comprising (i) a barrier film based on a mixture of polyamide and of polyolefin, and (ii), on at least one of its faces, a film based on a copolymer of ethylene and of an unsaturated ester, which can be welded by high frequency.The invention is useful for making flexible sachets of detergents, of bleach or of textile softeners.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: November 16, 1999
    Assignee: Elf Atochem S.A.
    Inventor: Michel DeGrand
  • Deoxyglucopyranoside compounds for inducing/stimulating hair growth and/or retarding hair loss
    Patent number: 5985841
    Abstract: A regimen for inducing/stimulating hair growth and/or retarding hair loss on an individual in need of such treatment comprises topically applying to the affected hair and/or scalp of such individual, a hair growth stimulating and/or hair loss retarding effective amount of at least one 2,3-dihydroxypropyl-2-(1-oxohydrocarbyl) amino-2-deoxyglucopyranoside having the structural formula: ##STR1## in which R is a linear or branched, saturated or unsaturated hydrocarbon radical having from 5 to 21 carbon atoms.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: November 16, 1999
    Assignee: ELF Atochem S.A.
    Inventors: Daniel Bernard, Henri-Jean Caupin, Serge Petit
  • Method for preparing .alpha., .omega.-bromochloroalkanes
    Patent number: 5981815
    Abstract: The invention relates to a process for the preparation of .alpha.,.omega.-bromochloroalkanes. A cyclic ether is hydrobrominated and then the phase obtained is reacted, without any prior purification or separation, with thionyl chloride.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: November 9, 1999
    Assignee: ELF Atochem, S.A.
    Inventors: Gilles Drivon, Christophe Ruppin
  • Peroxyoxalates derived from hydroxy-hydroperoxides
    Patent number: 5981787
    Abstract: Novel peroxyoxalate compositions of Structure A, ##STR1## and use of the novel monoperoxyoxalates of Structure A as initiators for polymerizing ethylenically unsaturated monomers and for curing of unsaturated polyester resins are disclosed.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: November 9, 1999
    Assignee: Elf Atochem North America, Inc.
    Inventors: Jose Sanchez, Daryl L. Stein
  • Organotin sulfonate catalysts and their manufacture
    Patent number: 5981685
    Abstract: Dual cure organotin salts of strong organic acids, the use of such salts as catalysts and an improved process for producing the catalysts are provided. The catalysts are capable of effectively catalyzing esterification and transesterification reactions and urethane, silicone, melamine, ester and acrylic forming reactions and can simultaneously catalyze more than one reaction in a mixture of urethane, silicone, amino, ester and acrylic polymer forming reactants to produce a polymer mixture.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: November 9, 1999
    Assignee: ELF Atochem North America, Inc.
    Inventors: Sri R. Seshadri, William D. Honnick, Melvin H. Gitlitz
  • Separation of sludge from liquid by piston-aided filtration
    Patent number: 5979304
    Abstract: An apparatus and a method using the apparatus are described for the separation by filtration of a solid phase and a liquid phase from a sludge. A pressure is exerted on the sludge with the aid of a piston in a filtration chamber having a filter. The filter is extracted from the chamber and the surface of the filter is swept using a scraper device. The invention can be used for the treatment of liquid manure.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: November 9, 1999
    Assignee: Elf Atochem S.A.
    Inventor: Marcel Norais
  • Aqueous compositions for stripping paints and primers with a high degree of crosslinking
    Patent number: 5980626
    Abstract: This composition for stripping paints coating a substrate, in particular for stripping paints and primers with a high degree of crosslinking, in particular of the epoxy, polyurethane and alkyd type, is characterized in that it consists of or comprises: (A) 50 to 80 parts by weight of water; (B) 20 to 50 parts by weight of benzaldehyde and/or of benzyl alcohol; (C) 5 to 15 parts by weight of at least one activator chosen from formic acid, formic acid totally or partially neutralized with a base, and bases; and (D) 0.5 to 10 parts by weight of at least one thickener, the said thickener necessarily being a thickener of acrylic nature when (B) consists solely of benzyl alcohol, (A)+(B) representing 100 parts by weight.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: November 9, 1999
    Assignee: Elm Atochem S.A.
    Inventor: Jean-Pierre Lallier
  • Anionically copolymerized living random (meth)acrylic copolymers and copolymers prepared therefrom
    Patent number: 5977261
    Abstract: Living random (meth)acrylic copolymers, facilely converted into random co(meth)acrylates and block copolymers thereof, comprise the anionic copolymerizates of at least one comonomer A with at least one comonomer B selected from among the (meth)acrylates and maleimides, at least one of the comonomers A and B comprising a (meth)acrylate, in the presence of (i) at least one alkali or alkaline earth metal, mono- or difunctional initiator and (ii) at least one ligand, for example a nonnitrogenous macrocyclic complexant, e.g., a crown ether, or an alkali metal alcoholate.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: November 2, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Jin-shan Wang, Philippe Bayard, Philippe Teyssie, Bruno Vuillemin, Philippe Heim
  • Process for the preparation of flame-resistant halogenated imide compounds
    Patent number: 5977379
    Abstract: The invention relates to the preparation of halogenated imides derived from hydrazine, a halogen and a dicarboxylic acid anhydride and capable of being employed as fireproofing agents for plastics.A dicarboxylic acid anhydride is halogenated with bromine, chlorine or a mixture thereof and then the product thus obtained is subsequently reacted with hydrazine. No prior purification or isolation of the intermediate halogenated anhydride is required.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: November 2, 1999
    Assignee: Atochem
    Inventors: Evelyne Bonnet, Bernard Gurtner
  • Use of a deodorizer based on undecylenic acid or on derivatives of the said acid to deodorize papers, cardboards and nonwovens
    Patent number: 5976460
    Abstract: The invention relates to the use of a deodorizer including undecylenic acid or a salt or an alkyl or polyoxyalkylenic ester or undecylenic acid to deodorize papers, cardboards and nonwovens. The invention also relates to papers, cardboards and nonwovens containing the above mentioned deodorizer.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: November 2, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Lucien Bourson, Henri-Jean Caupin
  • Shell/core particulates of superabsorbent polymers
    Patent number: 5976696
    Abstract: Shell/core distortion-resistant particulates of a partially crosslinked superabsorbent polymer, the gradient of partial crosslinking of which being to such extent that the shells are harder and less flexible than the cores thereof, have a capacity to absorb 0.9% saline water of at least 50 g/g and the modulus of which is at least 35,000 Pa; a bed of a saline water gel of the subject particulates has a saline water absorption of at least 20 g/g and a porosity of at least 500 g.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: November 2, 1999
    Assignee: Elf Atochem, S.A.
    Inventors: Christian Collette, Manuel Hidalgo, Andre Kowalik, Emmanuel Puchois
  • Catalytic oxychlorination of hydrocarbons to produce chlorocarbons
    Patent number: 5972827
    Abstract: Hydrocarbons, e.g., ethylene, are steady-state catalytically oxychlorinated into chlorocarbons, e.g., 1,2-dichloroethane, by fluidizing a fluidizable charge by directing a gaseous feedstream containing a hydrocarbon therethrough and therein oxychlorinating such hydrocarbon, the gaseous feedstream further comprising an oxygen-containing gas and gaseous hydrochloric acid and the fluidizable charge comprising immixture of a catalytically effective amount of an oxychlorination catalyst and particles of a catalytically and chemically inert solid substance, and which further comprises introducing a solution or suspension of a catalytically active copper compound into such fluidized charge during the oxychlorination reaction.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: October 26, 1999
    Assignee: Atochem
    Inventors: Alain Petit, Roland Bachelard, Rene Clair, Yves Correia
  • Base paints comprised of polyamide powders for use in coating PVC structures
    Patent number: 5972514
    Abstract: The invention relates to a coating composition for PVC sections, based on a polymeric vehicle, a crosslinking agent, and a thermoplastic resin powder. The coating composition is particularly useful for coating PVC sections for windows, shutters, and doors. PVC joinery coated with the composition of the invention has exceptional impact strength and resistance to abrasion, friction, and inclement weather.
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: October 26, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Bruno D'Herbecourt, Thierry Moulin