Patents Assigned to Atochem
  • 2,4-pentanedione-1-sulfonic acid and method for preparing the same
    Patent number: 5025104
    Abstract: 2,4-pentanedionemonosulfonic acid is prepared by reacting chlorosulfonic acid with 2,4-pentanedione, preferably in the presence of an anhydrous solvent. The method of this invention generally yields 2,4-pentanedionemonosulfonic acid in excess of about 75 percent. The noval pentanedionesulfonic acid 2,4-pentanedionemonosulfonic acid(acetylacetone sulfonic acid) is disclosed.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: June 18, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Apparatus for the preparation of carbon polymonofluoride
    Patent number: 5023057
    Abstract: This invention relates to apparatus for the preparation of carbon polymonofluoride.The reaction of fluorine diluted with at least one inert gas with carbon particles is performed in a reaction zone in which the particles travel as a thin layer. Diluted fluorine is introduced into the reaction zone in the form of a plurality of gaseous mixtures delivered at a plurality of points close to the layer of the particles and distributed in the reaction zone. The weight content of fluorine and the flow rate of each of the gaseous mixtures are controlled independently and such that the volume content of fluorine in the gaseous phase at the gaseous phase/particles interface in the vicinity of each of the points is lower than the minimum content causing the inflammation of the particles.For a space time output higher than 10 kg.multidot.h.sup.-1 m.sup.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: June 11, 1991
    Assignee: Societe Atochem
    Inventor: Jean Metzger
  • Functionalization of iodopolyfluoroalkanes by electrochemical reduction and new fluorinated compounds thereby obtained
    Patent number: 5023370
    Abstract: The invention relates to the preparation of functionalized derivatives from iodopolyfluoroalkanes by electrochemical reduction. This reduction is carried out in a formamide or substituted formamide solvent which may contain up to 70% (by volume) water, on a carbon cathode; for certain embodiments sulfur dioxide may also be present. This method of preparing perfluoroalkanecarboxylic acids R.sub.F COOH or perfluoroalkanesulphinic acids, R.sub.F SO.sub.2 H and alcohols of the R.sub.F C.sub.2 H.sub.4 OH type, also makes it possible to prepare new fluorinated compounds of formulae: I--(CH.sub.2).sub.p-1 --COOH and HO.sub.2 S--(CF.sub.2).sub.p-1 --COOH, in which p is an even-numbered integer which may range from 4 to 12.
    Type: Grant
    Filed: March 10, 1989
    Date of Patent: June 11, 1991
    Assignee: Atochem
    Inventors: Sylvie Benefice-Malouet, Hubert Blancou
  • Polyvinylidene fluoride products with a surface adapted to adhere to an incompatible polymer and process for treating the surface of a polyvinylidene fluoride material to enable it to adhere to an incompatible polymer
    Patent number: 5019444
    Abstract: A polyvinylidene fluoride product having at least one surface with improved adhesion to an incompatible polymer, said at least one surface covered with a porous polyvinylidene fluoride layer adhered thereto without a bonding intermediate, the process of forming the polyvinylidene fluoride product, and laminates thereof with non-adherent polymers.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: May 28, 1991
    Assignee: Atochem
    Inventors: Gilbert Duperray, Daniel Wolff
  • Alkyl aryl sulfones and method of preparing the same
    Patent number: 5015775
    Abstract: Alkyl aryl sulfones of the formula R--SO.sub.2 --AR--Y.sub.n, wherein Ar is an aryl compound, Y is a substituent on the aryl compound and R is alkyl or cycloalkyl, and liquid mixtures of positional isomers of the same are prepared by reacting an aryl compound of the formula Ar--Y.sub.n, with an alkyl sulfonic acid of the formula R--SO.sub.3 H and a phosphorus reagent, preferably under heat. Particularly good yields and pure products are obtained using phosphorus pentoxide. Alkyl aryl sulfones produced by this method are a liquid mixture preferably containing at least two positional isomers, wherein no isomer is present in an amount of more than about 50% of the isomer mixture.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: May 14, 1991
    Assignee: Atochem North America, Inc.
    Inventors: James L. Reilly, Gordon R. Leader
  • Preparation of 3-(alkylthio) aldehydes
    Patent number: 5015776
    Abstract: A process for preparing 3-(C.sub.1 -C.sub.12 alkylthio) C.sub.3 -C.sub.10 aldehydes by reacting a C.sub.1 -C.sub.12 alkyl mercaptan with an .alpha.,.beta.-unsaturated aliphatic aldehyde having from 3 to 10 carbon atoms in the presence of a weakly basic exchange resin having polyamine functionality and being in the free base form, is disclosed herein.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: May 14, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Novel single-functional and mixtures of multi-functional oligomeric performance additive compositions and their uses
    Patent number: 5013777
    Abstract: The present invention comprises novel single-functional and mixtures of multi-functional oligomeric performance additive compounds having one or more components of Structure A ##STR1## (The definitions of R, Z1, Z2, Z3, A1, A2, A3 and y are given in the Summary Section), their uses and polymeric compounds and compositions containing them which have enhanced oxidative stabilities, enhanced ultraviolet (UV) and light stabilities and/or enhanced flame retardance. An example is the bis sulfonic acid bispotassium salt reaction product from an oligomeric caprolactone diol (TONE.RTM. 260), 2-sulfobenzoic acid anhydride and potassium carbonate, and use of this product, at levels up to about 3.0%, in a general purpose bisphenol A polycarbonate resin, to enhance the fire resistance or flame retardance of the polycarbonate resin.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: May 7, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Ronald E. MacLeay, Jose Sanchez, Daryl L. Stein
  • Dielectric liquid compositions containing hydroxybenzaldehyde
    Patent number: 5014033
    Abstract: Novel dielectrically improved liquid compositions include at least one electrical insulating oil (A), e.g., benzyltoluene or oligomers thereof, and at least one aldehyde (B) containing at least six carbon atoms, or a functionally substituted such aldehyde, e.g., 3-ethoxy-4-hydroxybenzaldehyde.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: May 7, 1991
    Assignee: Atochem
    Inventors: Pierre Jay, Noelle Berger
  • Process for the preparation of expandable polymer beads and materials derived therefrom
    Patent number: 5011863
    Abstract: The polymerization in aqueous suspension of at least one vinylaromatic monomer is carried out in the presence, relative to the vinylaromatic monomer, of approximately 0.01% to 0.6% by weight of at least one polyethylene wax and of approximately 0.005% to 0.1% by weight of at least one nonionic surface-active agent which has an HLB value of between 7 and 16.Materials obtained from expandable beads prepared according to this polymerization process.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: April 30, 1991
    Assignee: Atochem
    Inventor: Hugues Godfrin
  • Method for determining sulfur loading in organic polysulfides
    Patent number: 5010022
    Abstract: A method of determining sulfur loading of an organic polysulfide composition comprises reacting the organic polysulfide composition with an organic phosphine to produce reaction products comprising organic phosphine sulfide and an organic sulfide selected from the group consisting of organic disulfide, organic trisulfide and mixtures thereof; and analyzing the reaction products by gas chromatography to determine the amount of sulfur.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: April 23, 1991
    Assignee: Atochem North America, Inc.
    Inventor: Michael J. Lindstrom
  • Method of joining pipes at their ends to form a pipeline
    Patent number: 5009737
    Abstract: A pipeline arrangement includes first and second pipe sections joined at the axial ends thereof and has a heat-sensitive covering extending between the axial ends of the pipe sections and lining the inner walls thereof. The heat-sensitive covering extends across the joint between the sections to provide a continuous covering of the inner walls of the pipeline. A method and apparatus for finishing the inner covering are also disclosed.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: April 23, 1991
    Assignee: Atochem
    Inventor: Pierre L. Lescaut
  • Process for preparing polysiloxazane compositions and the products formed thereby
    Patent number: 5010158
    Abstract: A process for the preparation of novel polysiloxazane compositions which comprises reacting at least one halosilane having the formula (R.sub.1).sub.a (R.sub.2).sub.b Si(Y).sub.4-(a+b) with at least one hydrazine having the formula NHR.sub.3 -NHR.sub.4 and water, wherein R.sub.1 and R.sub.2 are a hydrogen atom or a methyl, ethyl, vinyl or phenyl radical; R.sub.3 and R.sub.4 are hydrogen atoms, Y is a halogen atom and (a+b) is an integer between 0 and 3 and preferably 2. Polysiloxazane polymer compositions formed with polysiloxazanes prepared by the process described above comprise units of formula: ##STR1## combined with units of formula: ##STR2## and, if desired, units of formula: ##STR3## and, if desired, with units of formula: ##STR4## wherein radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: April 23, 1991
    Assignee: Atochem
    Inventors: Christian Colombier, Jean-Pierre Cuer
  • Consumption of hypochlorite values contained in perchlorate solutions of electrolysis
    Patent number: 5009754
    Abstract: The objectionable hypochlorite values, ClO.sup.- ions, contained in a solution of an alkali metal perchlorate produced by the electrolysis of an aqueous solution of the corresponding chlorate of the alkali metal, are effectively destroyed (consumed) without adversely affecting the valence state of the hexavalent chromium values also contained therein, by intimately contacting such perchlorate solution with an effective amount of hydrogen peroxide such that the molar ratio available hydrogen peroxide/hypochlorites is at least one.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: April 23, 1991
    Assignee: Atochem
    Inventor: Christian Pralus
  • UV curable compositions for making tentable solder mask coating
    Patent number: 5006436
    Abstract: A UV curable, aqueous alkaline developable solder mask composition having tenting capabilities includes a thermal free radical initiator capable of generating free radicals with heat, and a polyunsaturated compound capable of being thermally cross-linked by the free radicals to provide a substantially fully cured solder mask coating.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: April 9, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Paul L. K. Hung, Kenneth K. S. Tseng
  • Polyvinylidene fluoride compositions and products made therefrom
    Patent number: 5006602
    Abstract: A composition consisting essentially of a polyvinylidene fluoride polymer or copolymer having distributed substantially uniformly therethrough elastomeric particles, said elastomer being capable of absorbing hydrocarbons and fixing them in the composition and being present in an amount sufficient to increase the elongation and flexibility of the composition in the presence of hydrocarbons and shaped articles made therefrom.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: April 9, 1991
    Assignee: Atochem
    Inventors: Bernard Guerin, Albert Strassel
  • Continuous electrolytic production of alkali metal perchlorates
    Patent number: 5004527
    Abstract: The alkali metal perchlorates, e.g., sodium perchlorate or hydrate thereof, are continuously produced by continuously electrolyzing an aqueous solution electrolyte of a corresponding alkali metal chlorate in a single stage, while maintaining such electrolyte homogeneous and compositionally uniform over time by the continuous and simultaneous introduction of alkali metal chlorate and water thereto, and continuously directly separating desired alkali metal perchlorate from such solution of electrolysis.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: April 2, 1991
    Assignee: Atochem
    Inventors: Jean-Christophe Millet, Michel Jaccaud
  • Liquid coating composition comprising an organotin di- or tricarboxylate and an organic fluoroacid, and method of coating a transparent substrate therewith
    Patent number: 5000790
    Abstract: A liquid coating composition comprises an organotin di- or tricarboxylate and an organic fluoroacid for forming a fluorine-doped tin-oxide coating on glass having good bulk resistivity and haze values. The method of coating a transparent substrate with the composition is also described. The preferred liquid coating composition comprises about 50 to 80 wt. % of dibutyltin diacetate, and about 20 to 50 wt. % of trifluoroacetic acid.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: March 19, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Melvin H. Gitlitz, David A. Russo
  • Halogen substituted phthalimide flame retardants
    Patent number: 4999391
    Abstract: Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phthalimides are useful in increasing the flame retardancy of thermoplastic and thermosetting resins, and are also effective as processing aids in improving the flowability and moldability of thermoplastic resins during melt processing.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: March 12, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Joseph M. Bohen, Gerald H. Reifenberg, Daryl L. Stein
  • Production of hydrogen peroxide
    Patent number: 4996039
    Abstract: Hydrogen peroxide is produced from hydrogen and oxygen by (a) intimately contacting gaseous hydrogen at superatmospheric pressure with an inorganic aqueous reaction medium which includes a catalytically effective amount of a platinum group metal catalyst, (b) next diminishing the amount of hydrogen in the gaseous phase to a value under the explosive/flammable limits of admixture thereof with the gaseous oxygen introduced in step (c), and (c) intimately contacting and reacting the aqueous reaction medium and diminished gaseous phase with a source of gaseous oxygen.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: February 26, 1991
    Assignee: Atochem
    Inventors: Christian Pralus, Jean-Pierre Schirmann
  • Process for production of 1,1-dichloro-1-fluoroethane and/or 1-chloro-1,1-difluoroethane
    Patent number: 4996378
    Abstract: 1,1-Dichloro-1-fluoroethane and/or 1-chloro-1,1-difluoroethane are selectively produced by fluorination of 1,1,1-trichloroethane. Conditions in a first reaction zone selected to preferentially form 1,1-dichloro-1-fluoroethane. The reaction effluent is split between a 1,1-dichloro-1-fluoroethane recovery system, and a second reaction zone. The effluent from the latter is routed to 1-chloro-1,1,-difluoroethane recovery system. The second reaction zone conditions are selected for form 1-chloro-1,1-difluoroethane. The ratio of product formed by the overall process may be varied from up to 98% 1,1-dichloro-1-fluoroethane to greater than 98% 1-chloro-1,1-difluoroethane.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: February 26, 1991
    Assignee: Atochem North America, Inc.
    Inventors: Danny W. Wright, Barry L. Wagner