Patents Assigned to Atochem
  • Patent number: 4913834
    Abstract: Storage stable anhydrous fluid detergent formulation with bleaching action for textile comprising, in the anhydrous state, hydrogen peroxide and the process for the preparation of these formulations.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: April 3, 1990
    Assignee: Atochem
    Inventors: Bernard Dubreux, Jean-Pierre Schirmann
  • Patent number: 4912269
    Abstract: The invention relates to the preparation of perfluoroalkyl bromides or bromoperfluoroalkanes, CnF.sub.2n+1 -Br (n=1 to 20).Gaseous hydrogen bromide is reacted with a perfluoroalkanesulphonyl chloride, C.sub.n F.sub.2n+1 -SO.sub.2 Cl, in the presence of a catalyst consisting of a tertiary amine or phosphine or a quaternary ammonium or phosphonium salt, at a temperature ranging from 80.degree. to 200.degree. C.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: March 27, 1990
    Assignee: Atochem
    Inventors: Gilles Drivon, Pierre Durual, Bernard Gurtner, Andre Lantz
  • Patent number: 4908408
    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 retains adherence can reach about 200.degree.-220.degree. C.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: March 13, 1990
    Assignee: Atochem
    Inventors: Jacques Boutillier, Noelle Forichon, Yves Lermat
  • Patent number: 4906416
    Abstract: A process for preparing perfluoroalkanecarboxylic acids, wherein a perfluoroiodoalkane, R.sub.F I, is reacted with trichloroethylene in an acidic solvent in the presence of zinc, and the 2-perfluoroalkyl-1,1-dichloroethylene thus obtained is oxidized with the aid of permanganate, R.sub.F representing a straight chain or branched perfluoro radical containing one to 20 carbon atoms, together with certain novel perfluoroalkyldichloroethylenes having four or more carbon atoms so obtained.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: March 6, 1990
    Assignee: Atochem
    Inventors: Hubert Blancou, Auguste Commeyras, Robert Teissedre
  • Patent number: 4904458
    Abstract: A process for the manufacture of perborate monohydrate by the dehydration of perborate tetrahydrate at an absolute pressure maintained between 0.03 and 0.13 bar and a temperature of the perborate to be dehydrated not exceeding about 70.degree. C.
    Type: Grant
    Filed: February 12, 1985
    Date of Patent: February 27, 1990
    Assignee: Atochem
    Inventors: Jacques Dugua, Jean-Pierre Cuer
  • Patent number: 4902490
    Abstract: Essentially pure and colorless N-(dichlorophosphoryl)trichlorophosphazene [P.sub.2 NOCl.sub.5 ] is prepared/purified under relatively moderate conditions, by reacting phosphorous pentachloride with ammonium chloride, treating the resulting medium of reaction, containing P.sub.3 NCl.sub.12, with SO.sub.2, and thin film evaporating the medium of reaction, advantageously in two stages, to eliminate SO.sub.2, POCl.sub.3 and SOCl.sub.2 values therefrom.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: February 20, 1990
    Assignee: Atochem
    Inventors: Guy Pagniez, Philippe Potin
  • Patent number: 4900521
    Abstract: A process for purifying anhydrous aluminum chloride containing organochlorine impurities, comprising contacting said impure aluminum chloride with a bath containing at least one chloroaluminate for a time sufficient to remove said impurities therefrom and recovering the purified aluminum chloride in the vapor phase of the chloroaluminate bath.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: February 13, 1990
    Assignee: Atochem
    Inventor: Jacques Dugua
  • Patent number: 4900585
    Abstract: The process for the manufacture of cathodes suitable for use in electrolysis comprising depositing onto an electrically conductive substrate at least one layer of said Group VIII metal salts, one of which is a platinum group metal and then subjecting the whole to a heat treatment to oxidize said salts to the oxide form.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: February 13, 1990
    Assignee: Atochem
    Inventors: Francis Leroux, Dominique Ravier
  • Patent number: 4898896
    Abstract: A transparent polyamide containing terephthalic acid radicals or radicals of the mixture of terephthalic and isophthalic acids and a cycloaliphatic diamine radical and having the chain formations: ##STR1## in which: y.sub.1 +y.sub.2 is between 10 and 200 with y.sub.1 /(y.sub.1 +y.sub.2)>0.5;m, p, m' and p' are whole numbers equal to or greater than zero, such that: ##EQU1## is between 0.5 and 10, taken statistically over the marcomolecule; Z and Z' are the same or different and are either a polymethylene segment --(CH.sub.2)--.sub.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: February 6, 1990
    Assignee: Atochem
    Inventors: Philippe Maj, Philippe Blondel, Daniel Cuzin
  • Patent number: 4895952
    Abstract: A polyfluoroalkylthiomethyl compound of the formula:R.sub.f (CH.sub.2).sub.m --S--CH.sub.2 --Ain which R.sub.f is a straight-chain or branched perfluoroalkyl radical containing from 2 to 16 carbon atoms, m is an integer from 1 to 4, and A is a hydroxyl group, a chlorine or bromine atom, an ammonium group derived from a secondary or tertiary amine, a phosphonium group, or an ionic or nonionic group --Q--(CH.sub.2).sub.n --Z, in which Q is an oxygen or sulphur atom, n the number 0, 1 or 2, and Z an unsubstituted or substituted alkyl, aryl or alkylaryl radical. The invention also comprises the method of making such compound and the use thereof as a surface-active agent.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: January 23, 1990
    Assignee: Atochem
    Inventors: Frederique Marty, Emile Rouvier, Aime Cambon
  • Patent number: 4894187
    Abstract: The invention relates to the preparation of halogenated imides derived from hydrazine and halogenated dicarboxylic acid anhydride and which can be used as flameproofing agents for plastics. The condensation of hydrazine and halogenated dicarboxylic acid anhydride is carried out in an aqueous medium, at a temperature ranging from 40.degree. to 225.degree. C., with a molar ratio of anhydride/hydrazine substantially equal to 2.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: January 16, 1990
    Assignee: Atochem
    Inventors: Evelyne Bonnet, Andre Gagnieur, Bernard Gurtner
  • Patent number: 4892620
    Abstract: A sizing agent for paper consisting essentially of a latex consisting essentially of at least one diurethane dispersed in an aqueous medium, said diurethane being of the formula: ##STR1## in which: (a) R.sub.1, R.sub.2, R.sub.5 and R.sub.6 are each alkyl radicals and at least one of them possesses a minimum of 7 carbon atoms;(b) R.sub.7 and x represent, respectively, the cationic and anionic portions of the quaternizing agent R.sub.7 x;(c) R.sub.3 and R.sub.4 are selected from C.sub.2 -C.sub.4 alkylene radicals or polyalkoxylated radicals of a degree of polycondensation of between 1 and 4; and(d) Y is ##STR2## The process of making the sizing agent and using it to size paper are also disclosed.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: January 9, 1990
    Assignee: Atochem
    Inventors: Catherine Beuzelin, Claude Senez
  • Patent number: 4889910
    Abstract: Crude polyorganophosphazenes, produced by the nucleophilic cosubstitution of polydichlorophosphazenes and contained in a reaction medium which includes such polyorganophosphazenes, reaction solvent for the cosubstitution reaction, excess nucleophilic reagent and/or product of neutralization thereof, and, when present, any alkali metal salts of neutralization, are efficiently and facilely purified, in a single treatment zone, advantageously under agitation in a discontinuous malaxator, by both eliminating the reaction solvent and thereafter washing the resulting reaction medium with a liquid which is a nonsolvent for the polyorganophosphazenes, but miscible with the other products present in said reaction medium.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: December 26, 1989
    Assignee: Atochem
    Inventors: Serge Bordere, Guy Pagniez, Philippe Potin
  • Patent number: 4883859
    Abstract: In the process of producing hydroxylated polybutadiene from a diene monomer in the presence of hydrogen peroxide and a solvent, wherein the solvent is recovered by distillation for reuse; after separation of the hydroxylated polybutadiene from mixture containing such solvent and reaction impurities, the improvement comprising subjecting said mixture to the action of an alkali metal hydroxide or a hydrazine prior to distillation.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: November 28, 1989
    Assignee: ATOCHEM
    Inventors: Richard Audry, Gerard Krempf, Jackie Perono
  • Patent number: 4883625
    Abstract: The invention is a process for the manufacture of sections of thermoplastic resin reinforced with continuous fibers and the equipment for carrying out the process. The process consists of coating rovings, having their fibers previously arranged in the form of a sheet, in a coating zone fed with a molten thermoplastic, then, to ensure impregnation of each of the fibers of the rovings, the coated rovings are passed into a forced impregnation zone prior to passing into the channel for shaping the final product.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: November 28, 1989
    Assignee: Societe Atochem
    Inventors: Michel Glemet, Gilles Cognet
  • Patent number: 4879327
    Abstract: The invention relates to amine salts of phosphorous acid having a structure of the s-triazine, 1,2,4-triazole, benzimidazole, heptazine, pyrimidine, or piperazine type which may be combined with a polyhydroxylated compound as fireproofing agents for plastics, particularly polyamides and polyolefins, the process of fireproofing said plastics, and the resultant fireproofed plastics.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: November 7, 1989
    Assignee: Atochem
    Inventors: Pierre Poisson, Nadine Rivas, Pierre Deloy
  • Patent number: 4875909
    Abstract: In the recovery of ethylene oxide from the gas resulting from catalytic gas-phase oxidation of ethylene with a molecular oxygen-containing gas and consequently containing ethylene oxide, a method which comprises subjecting the bottom liquid of an ethylene oxide stripper to a flashing treatment thereby separating the bottom liquid into a vapor-phase part and a liquid-phase part, introducing the vapor-phase part in a compressed state into the bottom of the ethylene oxide stripper, and circulating the liquid-phase part to the absorber. The liquid-phase part, after exchanging heat with the bottom of the ethylene oxide absorber, is caused by a heat pump to liberate thermal energy and generate steam. Further, the liquid-phase part can be used as a heat source for the ethylene oxide refiner and/or the light ends stripper. Moreover, the gas from the top of the ethylene oxide stripper can be used as a heat source for the ethylene oxide refiner.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: October 24, 1989
    Assignees: Nippon Shokubai Kasaku Kogyo Co., Ltd., Atochem
    Inventors: Yukihiko Kakimoto, Masayuki Sawada, Yoshiaki Kajimoto, Isamu Kiguchi, deceased
  • Patent number: 4871506
    Abstract: A process for manufacturing thermoplastic polymer films by coextrusion comprising coextruding by blow extrusion at least two thermoplastic polymers, one of the polymers being a semi-crystalline fluid polymer, the other a thermoplastic polymer incompatible with and with no adhesive affinity for the semi-crystalline fluid polymer and possessing sufficient extrudate strength to support the semi-crystalline polymer, cooling the coextrudate, separation of the resulting films, and recovering at least the semi-crystalline thermoplastic polymer film thus formed in the form of a film of substantially uniform thickness.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: October 3, 1989
    Assignee: Atochem
    Inventors: Jean-Claude Moulies, Gerard Reignier
  • Patent number: 4868258
    Abstract: The improvement in a process for the preparation of latexes of homo- and co-polymers of vinyl chloride, with particles having a mean diameter between 0.2 and 0.8 .mu.m and containing at least one organosoluble polymerization initiator, by polymerization in microsuspension of the corresponding monomer or monomers, according to which a fine dispersion of the monomer or monomers is formed in an aqueous medium containing at least one anionic emulsifying agent or at least one anionic emulsifying agent and at least one nonionic emulsifying agent, in the presence of 0.004 to 0.16% by weight; in relation to the weight of the monomer or monomers, of said initiator expressed as active oxygen and then the thus formed reaction medium is subjected to polymerization at the desired polymerization temperature (.theta..sub.1); the improvement comprising adding to the aqueous medium 2,6-ditert.
    Type: Grant
    Filed: March 24, 1987
    Date of Patent: September 19, 1989
    Assignee: Atochem
    Inventor: Daniel Brulet
  • Patent number: 4868255
    Abstract: A process for preparing polymers and copolymers based on vinyl chloride by mass polymerization of a monomer composition based on vinyl chloride, comprising carrying out at least part of the polymerization reaction in a polymerization zone defined by an essentially spherical wall by effecting in the said polymerization zone a controlled and regulated circulation of the polymerization reaction mixture by means of a rotated blade-type turbine assembly, where the said blades pass by in the vicinity of the said wall over 10% to 60% of its surface, the reaction mixture being caused by the centrifugal force of said rotated blade-type turbine assembly to perform an at least partially ascending movement over at least part of the spherical wall and falling back, essentially under the action of gravity in the central part of the spherical polymerization zone, thus ensuring intensive mixing without dead space.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: September 19, 1989
    Assignee: Atochem
    Inventors: Jean Chatelain, Yves LeGrand