Assignee: Elf Atochem S.A.

Location: FR
No. of patents: 125

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Number	Title	Issue Date
7273512	Process for drying difluoromethane Process for drying wet F32, which comprises placing a stream of the said F32 in continuous contact with a feed stock of a composition comprising a molecular sieve chosen from a 3A type sieve, at a temperature of between 5 and 78° C. and at a pressure of between 0.5...	09/25/2007
6437173	Process for the continuous manufacturing of dialkylaminoalkyl (METH) acrylates having a critical order of steps The present invention relates to the manufacture of a dialkylaminoalkyl (meth)acrylate by transesterification of methyl or ethyl (meth)acrylate with an amino alcohol. The transesterification catalyst is chosen from tetrabutyl, tetraethyl and tetra(2-ethyl...	08/20/2002
6353065	Emulsion polymerization in the presence of a stable free radical A process for the emulsion polymerization in the presence of a stable free radical of at least one monomer which can be polymerized by the radical route, which emulsion comprises a liquid aqueous phase and a liquid organic phase, the aqueous phase compris...	03/05/2002
6346589	Polymerization in the presence of a stable free radical and of a free radical initiator The invention relates to a process comprising a stage of polymerization or copolymerization of at least one polymerizable or copolymerizable monomer by a radical mechanism in the presence of a stable free radical and of an initiator of formula: R1	02/12/2002
6312757	Cathode for diaphragm chlor-alkali electrolysis cell The invention concerns a diaphragm chlor-alkali electrolysis cell comprising a cover, a conductive base for supporting the anodes and a cathode in the form of a box provided with internal wall, external wall and tubular fingers made of a mesh or perforate...	11/06/2001
6297411	Mixed fluorination catalyst Mixed fluorination catalyst comprising one or more nickel and chromium oxides, halides and/or oxyhalides deposited on a support composed of aluminium fluoride or of a mixture of aluminium fluoride and alumina, characterized in that the weight of nickel/we...	10/02/2001
6297316	Bipopulated latex of polymers based on vinyl chloride, processes for the production thereof and application thereof in plastisols exhibiting improved rheology The present invention relates to a latex containing two populations of particles of polymers based on vinyl chloride. Other subjects of the present invention are processes for producing this latex and its use in the manufacture of fluid plastisols which a...	10/02/2001
6297309	Hot-melt pressure-sensitive adhesive for hygiene applications The present invention relates to a pressure-sensitive hot-melt adhesive composition characterized in that it includes a) at least one ethylene-alkyl acrylate copolymer, b) a tackifying resin and c) optionally a diluent and/or a stabilizer and/or a wax. Su...	10/02/2001
6271171	Catalyst for obtaining ଲ-hydroxy and/or ଱,ଲ-unsaturated carbonyl compounds The present invention relates to a process for obtaining a solid catalyst of general formula (I): [(Mg2+)1-x (Al3+)x (OH-)2 ]x+ [(OH-)x ]x- (H2	08/07/2001
6248687	Process for presulfurizing a desulfurization catalyst used in a hydrodesulfurization unit of petroleum refinery and presulfurization promoter Presulfurizing process and presulfurization promoter for a desulfurization catalyst to be used in a hydrodesulfurization unit of petroleum refinery of high molecular hydrocarbons, in which fresh metal oxide in said desulfurization catalyst is sulfurized w...	06/19/2001
6232394	Master batches containing vulcanizing agents The invention relates to thermoplastic master batches having at least one copolymer (A) of ethylene and of at least one unsaturated carboxylic acid ester as support and comprising vulcanization agents for rubbers. The invention also relates to a process f...	05/15/2001
6154357	Process for impregnation of electrical capacitors The invention relates To a process for the impregnation of electrical capacitors which includes performing the impregnation of the coil winding with a dielectric fluid, eliminating the excess of the dielectric fluid, filling the casing containing the impr...	11/28/2000
6143415	Adhesive bonding agent for PVDF, its application as barrier material and material obtained from the latter The invention relates to a bonding agent for PVDF, containing alkyl (alkyl)acrylate units and units bearing a carboxylic acid functional group. This bonding agent, containing PVDF, forms a barrier to hydrocarbons. The invention also relates to the materia...	11/07/2000
6120790	Thermoplastic resin composition Purpose: the purpose of the present invention is to offer resin compositions which have antimicrobial/fungistatic properties which show outstanding dispersion and outstandingly durable performance. Constitution: thermoplastic resin compositions characteri...	09/19/2000
6114586	Production of stabilized and deodorized organic polysulphides A process for stabilizing and deodorizing a raw organic polysulfide by treating it with an alkylene carbonate in the presence of a basic catalyst and, optionally, a sulfur donor....	09/05/2000
6114045	Flexible coatings with low surface tack and surface tension The invention relates to the films obtained by applying and drying a latex based on special acrylic monomers. These coatings are both flexible and have low surface tack and surface tension. The low tack and hydrophobic nature are provided by the special a...	09/05/2000
6110388	Sludge filtration device comprising a filter piston, and sludge treatment plant and sludge filtration process thereof The sludge filtration device comprises: a filter (1) placed over an approximately horizontal box (4), this filter (1) constituting, in its filtration position, the bottom of a filter chamber (8) of essentially vertical axis; a piston (10) suitable for clo...	08/29/2000
6111043	Fluorocopolymers for oil repelling and waterproofing treatment of various substrates In order to improve the barrier effect to fats of the cationic fluorinated copolymers of Patent EP 542,598 resulting from the copolymerization of at least one polyfluorinated monomer, of at least one aminoalkyl (meth)acrylate and of at least one vinyl mon...	08/29/2000
6107444	Thermoplastic composition based on a transparent thermoplastic (co) polymer containing polyamide particles which can be used for light-scattering shaped articles A thermoplastic composition for a light-scattering shaped article comprises a transparent thermoplastic polymer, especially a (meth)acrylic (co)polymer and polyamide particles having an average size of from 0.4 to 200 μm. A sheet obtained from the compos...	08/22/2000
6107398	Associative polymers containing 2,4,6-triphenethyl benzyl poly(ethoxy)(meth)acrylate as a monomer and their process of preparation by inverse emulsion polymerization Novel associative acrylic polymers prepared by radical inverse emulsion polymerization. It is a methacrylic ester in which the radical is composed of a hydrophilic segment and of a hydrophobic segment. The associative polymers of the invention can be used...	08/22/2000
6103682	Thick paint stripping composition A composition including an aprotic polar solvent such as DMSO, a non-protic water-soluble ether, a water-soluble thickener selected from acrylic acid polymers and an aliphatic amine having 6-20 carbon atoms....	08/15/2000
6103790	Cellulose microfibril-reinforced polymers and their applications Cellulose microfibril reinforced polyers, corresponding latices, powders, films and rods, and uses thereof. Polymer/cellulose composites are prepared using individualized cellulose microfibrils with a high form factor, e.g., tunicin microfibrils, as the r...	08/15/2000
6103945	Process for converting the low-boiling by-products formed during the thermal cracking of 1,2-dichloroethane Ethylene is chlorinated in a reaction zone to form a product stream containing 1,2-dichloroethane, the latter being then thermally cracked in a cracking zone to form vinyl chloride. Light by-products formed during the thermal cracking step are chlorinated...	08/15/2000
6093340	Use of mixtures based on difluoromethane and on pentafluorethane as cryogenic fluids in very low temperature refrigeration To replace bromotrifluoromethane (R-13B1) in very low temperature refrigeration, the invention proposes to employ a mixture containing, on a mass basis, 25 to 50% of difluoromethane and 50 to 75% of pentafluoroethane. A third component may be incorporated...	07/25/2000
6093772	Immiscible polymer compatibiliser system An immiscible polymer system is disclosed, said system itself ecomprising a stable mixture of polymers that are individually miscible with the polymers to be compatibilized. The compositions consisting of this polymer mixture may be obtained by extrusion....	07/25/2000
6090883	Process of manufacture of phenolic resins for the manufacture of products containing glass fibres and mineral fibres A process of manufacture of phenolic resins using calcium catalysis not comprising any filtration stage. This result is obtained by holding back the precipitation of the calcium species by the combined use of a chelatant/sequestrant and of a dispersing an...	07/18/2000
6087001	Coextrusion binder, its use in a multilayer structure and the structure thus obtained The invention relates to a coextrusion binder obtained by grafting a mixture of a copolymer of ethylene and of an elastomer of EPR type with an unsaturated carboxylic acid anhydride or its derivatives. The grafted mixture is optionally diluted in another ...	07/11/2000
6077961	Purification of thiopene Process for purifying a thiophene contaminated by mercaptans comprising selectively oxidizing the mercaptans to form polysulphides, then distilling the thiophene in this way....	06/20/2000
6077905	Impact-resistant injected polyamide components The invention relates to injected components based on polyamide resin (A) and on at least one copolymer (B) of ethylene and of an unsaturated epoxide, the copolymer (B) being obtained by copolymerization or by grafting the epoxide. The copolymer (B) is ad...	06/20/2000
6071472	Process and device for the anti-odor treatment of air The photocatalytic action of titanium dioxide and the anti-odor activity of undecylenic acid or its compounds are combined in an atmospheric scrubbing or renewal system. The invention consists in placing a filter impregnated with these two substances and ...	06/06/2000
6063505	Plastic films The object of the present invention lies in offering plastic film having a suitable degree of moisture permeability and low water droplet adhesion. Plastic film which is characterized in that, in plastic film of moisture permeability, as prescribed in JIS Z020...	05/16/2000
6057258	Solid catalytic component for the polymerization of olefins The invention relates to a process for the preparation of a solid catalytic component of metallocene type for the polymerization of olefins comprising a stage of reaction between a support and a derivative of formula R1 M1 X1	05/02/2000
6048618	Impregnating compounds for self-healing capacitors The present invention relates to the use of insulating fluids, selected from the group consisting of aliphatic esters, alkylbenzenes, crosslinkable compositions comprising at least one polydiene polyol, at least one polyisocyanate and at least one chemica...	04/11/2000
6045919	Antistatic film for packaging materials diffusing volatile products The invention relates to antistatic wrapping films comprising at least one layer made of polyamide or of an alloy of polyamide and of polyolefin. The antistatic additive is a polymer containing polyamide blocks and polyether blocks. They are particularly ...	04/04/2000
6045668	Diaphragm chlor-alkali electrolysis cell The invention concerns a diaphragm chlor-alkali electrolysis cell comprising a cover, a conductive base for supporting the anodes and a cathode in the form of a box provided with internal wall, external wall and tubular fingers made of a mesh or perforate...	04/04/2000
6045664	Process for the photochemical sulphochlorination of gaseous alkanes For manufacturing an alkanesulphonyl chloride by photochemical reaction of an alkane with chlorine and sulphur dioxide, the light source used is a gallium-doped medium-pressure mercury lamp....	04/04/2000
6039845	Process for the purification of pentafluoroethane by extractive distillation A process for the purification of pentafluoroethane (F125) containing chloropentafluoroethane (F115). The F125-F115 mixture to be purified is subjected to an extractive distillation, the extractant being a C5 -C8 perfluoroalkyl halid...	03/21/2000
6040456	Process for the preparation of 4-amino-1,2,4-triazole The present invention relates to a process for the preparation of products of formula (1): ##STR1## in which R denotes H or an alkyl group containing from 1 to 10 carbon atoms, it being possible for this alkyl group to be substituted by one or m...	03/21/2000
6036830	Desalination of aqueous sulphonamide solutions In order to remove the salts (in particular NH4 Cl) present in an aqueous sulphonamide solution (in particular CH3 SO2 NH2), the solution is subjected to a two-compartment electrodialysis. By maintaining the pH ...	03/14/2000
6027814	Pulverulent polyamide composition for the coating of metal substrates The invention relates to a composition including (i) at least one polyamide and at least one copolymer (A) of ethylene with at least one comonomer chosen from unsaturated carboxylic acids, esters of unsaturated carboxylic acids or vinyl esters of saturate...	02/22/2000

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Assignee: Elf Atochem S.A.