Pentavalent P, Except H(n+2)pno(3n+1) Patents (Class 252/389.23)
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Patent number: 6645399Abstract: Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: (HS)n—R—)(OH)m where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.Type: GrantFiled: December 17, 2001Date of Patent: November 11, 2003Assignee: Baker Hughes IncorporatedInventors: Young Soo Ahn, Vladimir Jovancicevic
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Patent number: 6620340Abstract: The invention is directed to a method for providing a corrosion inhibiting aqueous solution which includes zinc orthophosphate where the zinc orthophosphate is solubilized. The invention is directed to a method of making a substantially contaminant-free, concentrated aqueous solution of zinc orthophosphate from zinc metal or zinc oxide and aqueous phosphoric acid.Type: GrantFiled: April 18, 2002Date of Patent: September 16, 2003Assignee: Carus CorporationInventors: Richard E. Deblois, Kenneth S. Pisarczyk
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Patent number: 6572789Abstract: A method of inhibiting corrosion in aqueous systems comprising adding to the system a composition comprising mono, bis and oligomeric phosphinosuccinic acid adducts and a method of preparing a composition comprising mono, bis and oligomeric phosphinosuccinic acid adducts comprising adding hypophosphite to fumaric acid slurry or solution in water to create a reaction mixture; and effecting a reaction by introducing a free radical initiator to the reaction mixture.Type: GrantFiled: December 6, 2001Date of Patent: June 3, 2003Assignee: Ondeo Nalco CompanyInventors: Bo Yang, Peter E. Reed, John D. Morris
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Patent number: 6482483Abstract: A composition comprising tris(hydroxymethyl)phosphine or phosphorus-containing salts or condensates of those salts with nitrogen-containing compounds coated or absorbed onto a solid or porous substrate is disclosed. The salts or condensates are based on tetrakis(hydroxymethyl)phosphonium salts. The substrate has a melting point greater than 70° C. and is an optionally hydroxyl-substituted di- or polycarboxylic acid. The compositions may be used with water soluble film forming polymers to make sachets or bags containing sachets or bags of these phosphorous-containing compositions along with sachets or bags of compositions that are incompatible with these phosphorous-containing compositions.Type: GrantFiled: April 3, 2000Date of Patent: November 19, 2002Assignee: Rhodia Consumer Specialties LimitedInventors: Stephen David Fidoe, Christopher David Imrie, Christopher Raymond Jones, Robert Eric Talbot
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Patent number: 6468364Abstract: An anticorrosion treatment of an aluminium/zinc alloy surface is disclosed. The treatment includes the steps of forming on the alloy surface a coating of a solution which contain 5-40 grams of molybdenum per litre of the solution, 2-19% by volume of a phosphoric acid, and a surface etchant. The treatment also includes drying the coating to form a dried coating having a loading of molybdenum of at least 10 mg/m2 of the dried coating and of phosphorus of at least 15 mg/m2 of the dried coating.Type: GrantFiled: February 26, 2001Date of Patent: October 22, 2002Assignee: BHP Steel (JLA) Pty LtdInventor: Shannon Marecic
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Patent number: 6468470Abstract: A white rust inhibiting composition and method of inhibiting white rust for evaporative water coolers are disclosed. The composition includes, in combination, a blend of one or more organophosphorus compounds, one or more tannin compounds, and one or more water soluble metal compounds.Type: GrantFiled: June 18, 1999Date of Patent: October 22, 2002Assignee: Fremont Industries, Inc.Inventors: Michael T. Oldsberg, Bruce D. Busch
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Patent number: 6465548Abstract: The present invention relates to a stabilizer composition for organic polymer material containing (a) 6-hydroxychroman compound, a phosphorus antioxidant and (c) phenolic antioxidant, wherein the component (a) is contained in a proportion of 0.5 wt %-10 wt % and the total amount of the component (b) and the component (c) is in a proportion of 99.5 wt %-90 wt %, of the total amount of the components (a), (b) and (c). The present invention also relates to an organic polymer material composition containing an organic polymer and the above-mentioned stabilizer composition for organic polymer material. The use of the stabilizer composition of the present invention as a stabilizer for organic polymer materials affords an industrially extremely useful stabilized organic polymer material composition superior in heat stability during processing.Type: GrantFiled: April 14, 2000Date of Patent: October 15, 2002Assignee: Yoshitomi Fine Chemicals, Ltd.Inventors: Takeshi Inoue, Shoichi Horie
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Patent number: 6458874Abstract: The invention relates to a composition comprising a combination of compounds providing improved “direct to metal” adhesion and coating compositions comprising said composition. The coating compositions of the invention have improved adhesion when applied directly over metal substrates, especially untreated metal substrates such as galvanized steel, unsanded aluminum and unsanded cold-rolled steel.Type: GrantFiled: June 22, 2000Date of Patent: October 1, 2002Assignee: BASF CorporationInventor: David L. Newton
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Patent number: 6447594Abstract: A process for producing a strontium chromate corrosion inhibitor includes the steps of providing an aqueous slurry containing dispersed particulate strontium chromate, adding to the slurry a phosphoric acid or a neutral or acidic soluble salt of a phosphoric acid selected from the group consisting of ortho-phosphoric, pyro-phosphoric, tri-phosphoric, polyphosphoric, metaphosphoric, polymetaphosphoric, cyclic tri-metaphosphoric acid, and phosphorous acid, and, filtering and drying the resultant material whereby particulate strontium chromate of reduced solubility is produced.Type: GrantFiled: June 13, 2001Date of Patent: September 10, 2002Assignee: Wayne Pigment CorporationInventors: John Sinko, Michael Denesha
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Patent number: 6416712Abstract: Effective corrosion inhibitors having minimal organic content, particularly suitable for use in municipal drinking water systems, are described. The corrosion inhibiting additive is a stannous salt of a non-carbon acid.Type: GrantFiled: December 19, 2000Date of Patent: July 9, 2002Assignee: A.S. IncorporatedInventor: Olen L. Riggs, Jr.
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Patent number: 6383414Abstract: A process of inhibiting a corrosion of metal plugs formed in integrated circuits is described. The corrosion inhibiting process includes providing a partially fabricated integrated circuit surface including the metal plugs on a polishing pad to carry out chemical-mechanical polishing, introducing slurry including a corrosion inhibiting compound on the polishing pad in sufficient concentration to inhibit corrosion of the metal plugs of the partially fabricated integrated circuit surface, and polishing the partially fabricated integrated circuit surface.Type: GrantFiled: March 15, 2000Date of Patent: May 7, 2002Assignee: LSI Logic CorporationInventor: Nicholas F. Pasch
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Patent number: 6365067Abstract: Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: (HS)n—R—(OH)m where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.Type: GrantFiled: August 10, 2000Date of Patent: April 2, 2002Assignee: Baker Hughes IncorporatedInventors: Young Soo Ahn, Vladimir Jovancicevic
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Patent number: 6200529Abstract: Effective corrosion inhibitors having minimal organic content, particularly suitable for use in municipal drinking water systems, are described. The preferred corrosion inhibiting additive is an aqueous solution of a stannous halide, preferably stannous chloride.Type: GrantFiled: July 26, 1999Date of Patent: March 13, 2001Assignee: A. S. IncorporatedInventor: Olen L. Riggs, Jr.
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Patent number: 6183649Abstract: Water-circulating systems are treated with an aqueous, alkaline composition comprising I) an organo-phosphorus chelating agent, II) an acrylate homopolymer, III) a salt of an acrylic copolymer, a portion of the repeating units of which contain sulfonate groups, IV) a molybdate salt, and V) a salt of a fused-ring aromatic triazole. This composition (which is formulated in accordance with a specific order of addition of the ingredients) is effective against white rust (corrosion of galvanized metal parts). When the water-circulating system is also fouled with a biofilm, it is preferred to introduce a biofilm remover having biocidal, surfactant, and chelating properties into the system, but the biofilm remover is introduced separately from the above-described composition.Type: GrantFiled: October 7, 1998Date of Patent: February 6, 2001Inventor: Michael W. Fontana