Patents Assigned to Atochem North America, Inc.
  • 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
  • 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
  • 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
  • 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
  • High yield method for preparation of dialkyl esters of polyhaloaromatic acids
    Patent number: 5208366
    Abstract: An improved process is provided for the preparation of esters of polyhalophthalic acids, polyhalobenzoic acids, and polyhalophthalic anhydride useful as flame retardants for thermoplastic and thermosetting resins, which comprises the reaction of the above acids or anhydride with alcohols in the presence of certain metal and metallorganic compounds as catalysts. Also provided are certain esters per se.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: May 4, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Joseph M. Bohen, Anthony J. Mancuso
  • Manufacture of hydrofluorocarbons
    Patent number: 5208395
    Abstract: A novel, heterogeneously-catalyzed, gas phase process for the production of 32 and 152a which comprises contacting the corresponding 1,1-dichloroalkane and HF in the vapor phase in the presence of a Lewis acid catalyst such as tin tetrachloride.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: May 4, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventor: Maher Y. Elsheikh
  • Purification and decolorization of off-color alkyl alkanolamines
    Patent number: 5208377
    Abstract: Off-color N-(C.sub.4 -C.sub.10)alkyl di(C.sub.2 -C.sub.3) alkanolamines purified and decolorized by vacuum distillation at a pressure within the range of 1 to 50 mm.Hg (1-50 torr) in the presence of water and or water-soluble metal borohydride whereby the distilled alkanolamine has a reduced APHA color rating which is maintained on storage.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: May 4, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Thomas H. Overgaard, Louis P. Verduce
  • Hydrazido functionalized 2-(2-hydroxyphenyl)-2H-benzotriazoles
    Patent number: 5206378
    Abstract: Ultraviolet light stabilizers are chemically bound to anhydride containing polymers or copolymers. Polymeric stabilizers are prepared by the reaction of primary amino or hydrazido-substituted UV absorbers with some or all of the anhydride groups of the polymer or copolymer to form pendant stabilizer substituted imide or amic acid groups. The polymer bound stabilizers are not lost from the polymer system by volatilization, migration, or extraction, even at high temperature. The polymer stabilizers of this invention may be used as they are or as concentrates to stabilize other polymer systems.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: April 27, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Ronald E. MacLeay, Terry N. Myers
  • Sealer finish remover compositions
    Patent number: 5202049
    Abstract: A sealer finish remover composition containing a solvent, water, and an organosilicon complex formed from a silicate such as sodium metasilicate and a linear, 6-10 carbon, organic compound such as sodium n-octane sulfonate.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: April 13, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventor: Mary E. Bingham
  • Device for detecting air flow through a passageway
    Patent number: 5201322
    Abstract: A device is disclosed for detecting the presence and direction of air flow through a passageway having a first opening and a second opening for air to flow therethrough in either a first direction or a second direction. The device comprises a piezoelectric sensor located within the passageway. A flow director is provided within the passageway for directing air flow through the passageway for impingement upon the sensor. The sensor generates a first electrical signal when air flows through the passageway in the first direction and a second electrical signal when air flows through the passageway in the second direction. A discriminator is electrically connected to the sensor for receiving the first and second electrical signals and for discriminating between the two signals to identify the direction of air flow through the passageway.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: April 13, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: John C. Henry, Kyung T. Park
  • R22/R124/R142b refrigerant blends
    Patent number: 5188749
    Abstract: Refrigerant mixtures of the HCFCs monochlorodifluoromethane, 2-chloro-1,1,1,2-tetrafluoroethane, and 1-chloro-1,1-difluoroethane whose composition falls within the area of polygon KLTS of the FIGURE.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: February 23, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventor: Richard M. Crooker
  • Preparing sulfur solvent compositions comprising treating a sulfide and polyalkyleneoxyamine or polyalkyleneoxypolyamine mixture with an alkylamine or alkanolamine
    Patent number: 5186848
    Abstract: A process is disclosed for preparing a composition having improved solvent power for sulfur wherein a composition comprising a sulfide having the general formula RSSaSR' wherein R and R' are defined carbon-containing radicals and a is 0 to 3, and a catalyst for improving the ability of said composition to take up sulfur is treated, either before, during or after the addition of said catalyst to said composition, with a primary or secondary amine in an effective amount and for an effective time period.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: February 16, 1993
    Assignee: Elf Atochem North America, Inc.
    Inventors: Glenn T. Carroll, Michael J. Lindstrom
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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