Patents Assigned to Atochem
  • Poly(dichlorophosphazenes)/poly(organophosphazenes) having regulated molecular weights
    Patent number: 5230875
    Abstract: The molecular weights of the poly(dichlorophosphazenes), and of the poly(organophosphazenes) produced therefrom, are controlledly regulated by heating such poly(dichlorophosphazenes) in the presence of an effective molecular weight-regulating amount of phosphorus oxychloride.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: July 27, 1993
    Assignee: Atochem
    Inventors: Roger de Jaeger, Guy Pagniez, Philippe Potin
  • Process for the preparation of .alpha.-fluoroacrylates
    Patent number: 5231219
    Abstract: Process for the manufacture of .alpha.-fluoroacrylates of general formula: ##STR1## with R' alkyl, aryl or cycloalkyl, according to which source of formalin, consisting of paraformaldehyde is reacted with an .alpha.-fluorophosphonoacetate in aqueous medium in the presence of a salt of a weak inorganic acid.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: July 27, 1993
    Assignee: Elf Atochem S.A.
    Inventors: Claude Grison, Nathalie Boulliung, Philippe Coutrot
  • Antioxidant polyolefin compositions
    Patent number: 5229444
    Abstract: Antioxidant-containing polyolefin composition containing a polyolefin and an antioxidant compound having the general formula: ##STR1## wherein R, R', X and Y are the same or different and are selected from alkyl, phenyl, cyclohexyl, a mono or polyfunctional carboxylic acid ester, hydroxyalkyl, and aralkyl, which groups may be unsubstituted or substituted, linear or branched, or cyclic, and p indicates a degree of polymerization and is at least 2.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: July 20, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: William L. Smith, Michel Foure', Dominique Ranceze, Pierre Tozzolino
  • Aerobic biological nitrification using biomass granulates
    Patent number: 5228997
    Abstract: Effluents contaminated with NH.sub.4.sup.+ values, e.g., domestic sewage, are purified by aerobic biological nitrification within a bed of biomass granulates, e.g., a fluidized bed, such granulates comprising a nitrification effective amount of at least one nitrifying microorganism firmly adhered to support, preferably carbonate granules consumable thereby.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: July 20, 1993
    Assignee: Atochem
    Inventors: Guy Martin, Gilbert Blanchard, Michel Pouillot
  • Sodium perborate
    Patent number: 5229092
    Abstract: Sodium perborate tetrahydrate in the form of virtually spherical and compact agglomerates of unit particles of sodium perborate tetrahydrate with a maximum size not exceeding 30 m, process for its manufacture, its use in the manufacture of sodium perborate monohydrate with high resistance to wear, and the resultant sodium perborate monohydrate.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: July 20, 1993
    Assignee: Atochem
    Inventor: Jacques Dugua
  • Synthesis of 1,2-dichloroethane by CCl.sub.4 oxychlorination of ethylene
    Patent number: 5227549
    Abstract: A major amount of 1,2-dichloroethane (D12) and lesser amounts of trichloroethane and tetrachloroethane are prepared by contacting carbon tetrachloride, ethylene and oxygen (or an oxygen-containing gas, notably air) with an oxychlorination catalyst at a temperature sufficient to produce D12, and thereafter separating such D12 from the products of reaction.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: July 13, 1993
    Assignee: Elf Atochem S.A.
    Inventors: Yves Correia, Gerard Chastel
  • Acrylic copolymers and their use as coatings
    Patent number: 5225505
    Abstract: These acrylic copolymers, which are useful as coatings, in particular as soil-repellent coatings for the building industry, comprise, per 100 parts by weight:about 20 to 95 parts of at least one alkyl acrylate or methacrylate whose alkyl group has 1 to 10 carbon atoms or aryl acrylate or methacrylate whose aryl group has 6 to 10 carbon atoms,about 5 to 50 parts of at least one aminated methacrylate of the formula: ##STR1## in which n is an integer between 1 and 20 and R.sub.1 is an alkyl radical having 1 to 10 carbon atoms, and about 0 to 65 parts of at least one fluorinated alkyl (meth)acrylate.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: July 6, 1993
    Assignee: Atochem
    Inventor: Bernard Wiegert
  • Stabilized 14lb
    Patent number: 5221697
    Abstract: Storage-stable 141b prepared by contacting 141b with alumina at temperatures of about 0-100 degrees Centigrade, compositions containing the thus treated 141b, and uses thereof for the production of polyurethane and polyisocyanurate foams.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: June 22, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Richard M. Crooker, Maher Y. Elsheikh
  • Two-step bleaching of plant materials
    Patent number: 5219601
    Abstract: A variety of plant materials adopted for processing into, e.g., low-calorie vegetable fibers and dietary flours, are bleached by (1) prebleaching such plant material in a first aqueous solution containing an alkaline agent and hydrogen peroxide, the alkaline agent being present in solution in such amount that the final pH of the resulting suspension is no greater than 9, (2) filtering and washing the suspension produced in step (1) with water, to an effectiveness of at least 50%, (3) bleaching the material obtained after step (2) in a second aqueous solution containing an alkaline agent and hydrogen peroxide, the alkaline agent being present in solution in such amount that the final pH of the resulting suspension is no greater than 8.5, and, characteristically, (4) filtering and washing the suspension produced in step (3) with water.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: June 15, 1993
    Assignee: Elf Atochem S.A.
    Inventor: Michel Devic
  • Destruction of halogenated organic species
    Patent number: 5220109
    Abstract: Halogenated organic species, e.g., chlorinated or brominated dioxins or dibenzofurans, PCBs, and the like, are consumed by contacting such species, at a temperature of greater than 220.degree. C., with a stoichiometric excess, relative to the halogen content thereof, of at least one alkali metal alcoholate.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: June 15, 1993
    Assignee: Atochem
    Inventors: Raymond Commandeur, Elie Ghenassia, Bernard Gurtner
  • Production of concentrated aqueous solutions of ferric chloride
    Patent number: 5219531
    Abstract: Concentrated aqueous solutions of ferric chloride, directly useful as flocculating agents in a variety of water treatments, are prepared by (a) reacting chlorine, advantangeously a stoichiometric amount of chlorine, with an aqueous solution of ferrous chloride in the presence of an aqueous solution of ferric chloride, in an essentially vertical reaction zone, with at least a major amount of the ferrous chloride solution being introduced to the upper section of such reaction zone, at least a major amount of the chlorine being introduced countercurrently to the base of such reaction zone, and the ferric chloride solution being introduced at at least one point intermediate such ferrous chloride solution/chlorine inlets, and (b) recovering final product aqueous solution of ferric chloride from the base of the reaction zone.
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: June 15, 1993
    Assignee: Atochem
    Inventors: Rene Clair, Alain Gallet
  • Flame retardants compounds
    Patent number: 5220015
    Abstract: Polymeric flame retardants comprise halogenated aromatic compounds having acylamino functional groups which are chemically bonded to cyclic imide-containing or imide-forming polymers or copolymers. The polymeric flame retardants are prepared by the reaction of halogenated aromatics containing a reactive hydrazido group with some or all of the anhydride groups of an cyclic alpha, beta-unsaturated dicarboxylic acid anhydride polymer or copolymer to form pendant halogenated-aromatic-substituted imide or amic acid groups. In addition, polymeric flame retardants are used to render thermoplastic resins less flammable under conditions which promote combustion. Novel flame retardant hydrazides are disclosed.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: June 15, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Ronald E. MacLeay, Terry N. Myers
  • Optimization of process/property/compositional parameters
    Patent number: 5218526
    Abstract: The process parameters of a variety of industrial processes and/or the properties and characteristic formulation of a given composition are optimized by means of a succession of hypercubes of 2.sup.k vertices, with k representing the number of variables, and wherein the successive value of the variables and the resulting final properties are calculated algorithmically.
    Type: Grant
    Filed: November 23, 1990
    Date of Patent: June 8, 1993
    Assignee: Atochem
    Inventor: Gilbert Mozzo
  • Method for bleaching and abrading fabrics
    Patent number: 5215543
    Abstract: Methods are provided for abrading dyed fabric to produce a stonewashed effect by tumbling the fabric with stones of a chemical composition that is soluble in wash or rinse liquid for the fabric, where the stones are of sufficient size and hardness to effect abrasion of the fabric without substantial mechanical disintegration of the stones and in a manner simulating the action of pumice stone. The chemical stonewashing composition may be a compacted powder, agglomerate, coagulate, or other integral mass or solid formed from an alkali or alkaline earth metal carbonate, bicarbonate, silicate, sulfate, borate, halide, hydroxide or hydrate or peroxyhydrate thereof, for example.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: June 1, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: David J. Milora, David M. Shank, Peter A. Curato
  • Epoxy resins containing bound light stabilizing groups
    Patent number: 5213897
    Abstract: Curable compositions which are precursors for cured or partially cured light stabilized epoxy resins which are the product of the reaction of some or all of the epoxy groups of an epoxy resin with an N-(2,2,6,6-tetraalkyl-4-piperidinyl)amic acid hydrazide as well as the cured or partially cured reaction products thereof together with processes for their use and articles of manufacture produced thereby are disclosed.
    Type: Grant
    Filed: April 3, 1991
    Date of Patent: May 25, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Arthur L. Baron, Ronald E. MacLeay, Jennifer P. Kmiec
  • Block copolyetheramides
    Patent number: 5213891
    Abstract: Block copolyetheramides, well adopted for conversion into a wide variety of useful thermoplastic elastomer shaped articles, have the formula: ##STR1## in which D is the residue of a diacid oligamide having an Mn ranging from 300 to 3,000 and/or the residue of the diacid chain limiter, PE is the residue of a polyetherdiol having an Mn ranging from 200 to 5,000,.times.is a straight or branched chain (cyclo)aliphatic or aromatic hydrocarbon having from 4 to 20 carbon atoms, n is a number ranging from 1 to 4, and m is an average number ranging from 2 to 50; these are prepared by polycondensing a multiblock polymer having the formula: ##STR2## with a diamine H.sub.2 N--X--NH.sub.2.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: May 25, 1993
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Maj, Daniel Cuzin
  • Process for preparing reactive hindered amine light stabilizers
    Patent number: 5214147
    Abstract: N-(2,2,6,6-tetraalkyl-4-piperidinyl)amide-hydrazides of dicarboxylic acids contain a light stabilizing group, a heat stabilizing group, and a reactive hydrazide functionality in the same molecule. The reactive stabilizers are prepared by reacting 4-amino-2,2,6,6-tetraalkylpiperidines with diesters (or mono ester acid chlorides) of dicarboxylic acids or dialkyl itaconates followed by hydrazinolysis of the ester group of the intermediate mono esteramide. The compounds are useful for introducing permanent heat and light stability to coreactive polymers or copolymers. They are also useful in the stabilization of inert polymeric systems against the degradative effects of heat and light when merely mixed with, rather than reacted with, the polymers for which stabilization is sought.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: May 25, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Robert T. Kazmierczak, Ronald E. MacLeay
  • Method and apparatus for filling drums with immiscible liquids such as white phosphorus and water
    Patent number: 5213140
    Abstract: A drum is filled with two liquids of different densities which are immiscible when combined, such as white phosphorus and water. The drum is positioned on a scale beneath a fill pipe. An actuator lowers the fill pipe into the drum. A quantity of water is injected, followed by a quantity of white phosphorus, followed by a quantity of water to rinse the fill pipe. The fill pipe is raised just out of the liquids and allowed to drip, and then is fully raised to enable the filled drum to be replaced by an empty drum. The white phosphorus is injected at varying flow rates.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: May 25, 1993
    Assignee: Atochem
    Inventors: Michel Miscevic, Claude Cochet
  • Hardenable fluorinated copolymer, the process for making the same, and its application in paints and varnishes
    Patent number: 5212267
    Abstract: A hardenable copolymer containing copolymerization molecular constituents from a fluorinated monomer and an allylic compound, characterized in that:(a) the fluorinated monomer molecular constituents originate from the combination of tetrafluoroethylene and chlorotrifluoretyhylene,(b) the molecular constituents from the allylic compound originate from an allylic polyol of formula: ##STR1## in which R.sub.1 is H or CH.sub.2 OH, R.sub.2 is OH or CH.sub.2 OH, R.sub.3 is CH.sub.3 or OH, with the condition that R.sub.1 and R.sub.3 cannot be simultaneously H and CH.sub.3, and that it also contains (c) copolymerization molecular constituents from a vinylic ether of formula:CH.sub.2 .dbd.CH--O--Rin which R is a linear or branched chain alkyl radical with 2 to 13 carbon atoms, and the process of making such copolymers and paints and varnishes containing the same.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: May 18, 1993
    Assignee: Atochem
    Inventors: Patrick Kappler, Jean-Luc Perillon
  • Methods and compositions for treating metals by means of water-borne polymeric films
    Patent number: 5211881
    Abstract: Corrosion resistance of metals such as aluminum is promoted by contact with a formulation containing a solution of an acrylic polymer; a blocked water-soluble zirconium or zinc catalyst; a mixture of water and an organic solvent; and a corrosion additive component.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: May 18, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Frank A. Muller, Ronald F. Dubs