From Metallic Substrate Patents (Class 510/202)
  • Patent number: 6586380
    Abstract: This invention concerns a composition useful as a paint remover, comprising: alkylene carbonate such as propylene carbonate or ethylene carbonate, hydrogen peroxide, and water, and optionally an alcohol such as benzyl alcohol. In another broad respect, this invention concerns a process for removing paint, comprising: applying a composition containing alkylene carbonate, hydrogen peroxide, and water to a painted surface for a time and under conditions effective to cause blistering or bubbling of the paint. In another broad respect, this invention is a composition useful as a paint remover, comprising: dialkyl carbonate, hydrogen peroxide, and water, optionally containing an alcohol, optionally containing a glycol ether. In another broad respect, this invention is a process for removing paint, comprising: applying a composition containing dialkyl carbonate, hydrogen peroxide, and water to a painted surface for a time and under conditions effective to cause blistering or bubbling of the paint.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: July 1, 2003
    Assignee: Huntsman Petrochemical Corporation
    Inventors: Edward T. Marquis, Robert E. Baldwin
  • Publication number: 20030114328
    Abstract: The present invention relates to a water-soluble composition for removing rust from steel bars and steel frames, which is environmentally harmless and permits improving work efficiency by allowing work to be conducted in a state where rust was simply removed from the steel bars and frames by applying it on the steel bars or frames with a spray or brush. The rust-removing preparation of the present invention comprises a mixture of 10-11% by weight of phosphoric acid, 6-7% by weight of sodium pyrophosphate, 6-7% by weight of a hard water softener, 7-8% by weight of zeolite, 2-3% by weight of xanthan, 2-3% by weight of a surfactant, 4-5% by weight of stearic acid, 6-7% by weight of methyl alcohol and 2-3% by weight of a defoamer in 50-51% by weight of water.
    Type: Application
    Filed: September 18, 2002
    Publication date: June 19, 2003
    Inventor: Kwon-Taeg Kim
  • Publication number: 20030109394
    Abstract: The present invention is directed to cleaning compositions for metal surfaces, including both concentrates and ready-to-use solutions. These compositions include a source of calcium ion, a source of alkalinity, a chelating agent, and a surfactant. In some embodiments, a water-soluble or water-dispersible acid-substituted polymer is also included. Additionally, in some embodiments, specific surfactants or chelating agents are used to enhance the performance of the composition.
    Type: Application
    Filed: September 28, 2001
    Publication date: June 12, 2003
    Applicant: Ecolab, Inc.
    Inventors: Richard O. Ruhr, Mark D. Levitt, Edward H. Richardson, Victor F. Man
  • Patent number: 6548471
    Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: April 15, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Richard M. Flynn, George G. I. Moore
  • Patent number: 6548464
    Abstract: A composition useful as a paint remover, including alkylene carbonate such as propylene carbonate or ethylene carbonate, and an alcohol such as benzyl alcohol. Also, a process for removing paint, comprising: applying a composition containing alkylene carbonate and an alcohol to a painted surface for a time and under conditions effective to reduce adhesion between the top coats and the primer or undercoat of the paint. In another aspect, this paint remover includes dialkyl carbonate and an alcohol, optionally containing a glycol ether. In another aspect, the process includes applying a composition containing dialkyl carbonate and an alcohol. This paint remover may include a thickener, a surfactant, or a corrosion inhibitor.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: April 15, 2003
    Assignee: Huntsman Petrochemical Corporation
    Inventors: James R. Machac, Jr., Edward Chung-Yit Nieh, Susan A. Woodrum, Edward T. Marquis
  • Patent number: 6544939
    Abstract: A silicone dissolving composition includes an organo-acid compound such as sulfonic acid or phosphinic acid, a solvent miscible with the organo-acid and able to swell a silicone, a thickener and a small amount of mineral acid. Silicone films dissolve to a liquefied mass capable of being wiped from a substrate in a matter of minutes. The removal of automotive, electrical, and construction sealants and gaskets is simplified with the use of such a silicone dissolving composition.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: April 8, 2003
    Assignee: Permatex, Inc.
    Inventors: Hans Haas, Marcia Snyder
  • Patent number: 6534460
    Abstract: A pleasant smelling, non-toxic dry composition comprised of sodium bicarbonate embedded in a rubber matrix for removing adhesives from smooth surfaces is described. The composition is prepared by mixing 2 volumes of packed sodium bicarbonate with one volume of rubber cement and allowing the mixture to dry. The dry composition is dispensed from a tube type dispenser. The adhesive is removed by rubbing the dry composition against the adhesive until the smooth surface is clean.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: March 18, 2003
    Inventor: Ronald L. Van Meter
  • Patent number: 6534461
    Abstract: The invention relates to a stripping composition which can be used in the construction field, especially for the stripping of external organic coatings, such as exterior waterproof coatings and thin films, and in the yachting field, for the stripping of antifouling coatings, characterized in that it comprises: at least one dibasic ester, at least one dipolar aprotic solvent, at least one inorganic filler, water, at least one cellulose thickener, at least one dispersing agent and activators.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: March 18, 2003
    Assignee: ATOFINA
    Inventor: Jean-Pierre Lallier
  • Patent number: 6528468
    Abstract: The present invention relates to a pickling agent for the chemical conversion coating of a heat exchanger which is capable of cleaning the complicated structure comprising fins and tubes of a heat exchanger in preparation for the successful formation of a chemical conversion film, a method of pickling a heat exchanger, a method of treating a heat exchanger comprising said pickling method, and a heat exchanger produced by using said treating method. The present invention provides pickling agent for the chemical conversion coating of a heat exchanger which comprises an acidic aqueous solution containing nitric acid and/or sulfuric acid and at least one metal and/or metal oxoanion salt derived from any metal selected from the group consisting of iron, nickel, cobalt, molybdenum and cerium.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: March 4, 2003
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Masahiko Matsukawa, Kentaro Saito, Toshio Inbe, Kasuyoshi Yamasoe
  • Patent number: 6509309
    Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: January 21, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Richard M. Flynn, George G. I. Moore, John G. Owens
  • Patent number: 6506459
    Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: January 14, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Richard M. Flynn, Mark W. Grenfell, George G. I. Moore, John G. Owens
  • Publication number: 20030004080
    Abstract: A long-time stable pickling agent for the removal of an oxide layer on a stainless steel after heat treatment, such as welding, which pickling agent comprises nitric acid and fillers and constitutes of a pickling paste or pickling gel to be coated on the heat treated stainless steel, or of a pickling liquid to be sprayed on the steel. According to the invention, the pickling agent also comprises urea for reduced formation of nitrous fumes when the pickling agent is used.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 2, 2003
    Inventors: Sven-Eric Lunner, Fredrik Hagg
  • Publication number: 20030004078
    Abstract: The invention relates to a composition and method for cleaning, protecting and restoring surfaces, particularly for vehicles such as automobiles and boats. The composition includes wax, an emulsifier, water, organic solvent and silicone liquid.
    Type: Application
    Filed: July 31, 2002
    Publication date: January 2, 2003
    Applicant: Pennzoil-Quaker State Company
    Inventors: Michael Schmeida, Brian Sokol
  • Patent number: 6498132
    Abstract: A method for treating the surface of a substrate with a surface treatment composition, wherein the surface treatment composition comprises a liquid medium containing a complexing agent as a metal deposition preventive, the complexing agent comprising at least one member selected from Group A complexing agents and at least one member selected from Group B complexing agents as defined hereinafter.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: December 24, 2002
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hitoshi Morinaga, Masaya Fujisue
  • Patent number: 6494960
    Abstract: A method for removing an aluminide coating from a substrate includes the steps of contacting the surface of the substrate with at least one stripping composition to degrade the coating. The stripping composition includes an aliphatic or aromatic sulfonic acid, and at least one additive. The coating is then removed.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: December 17, 2002
    Assignee: General Electric Company
    Inventors: Leo Spitz Macdonald, D. Sangeeta, Mark Alan Rosenzweig
  • Publication number: 20020183221
    Abstract: This invention relates to a method to facilitate the removal of adherent polymeric films from a hard surface occasioned by the evaporation of solvent from compositions containing an anionic acrylates copolymer, the method comprising incorporating a phosphate ester surfactant into the compositions, and washing the film from the surface to which it adheres.
    Type: Application
    Filed: February 22, 2002
    Publication date: December 5, 2002
    Inventor: Stanley Pohl
  • Patent number: 6482270
    Abstract: A composition useful as a paint remover. The composition may include a carbonate, a dibasic ester and a mono-ester. The composition may also contain an organic sulfur-containing compound such as dimethyl sulfoxide (DMSO), a glycol ether, a ketone, or combination thereof. The composition may be used in a process for removing paint by applying it to a painted surface. The compositions have several important attributes, including low toxicity and high efficacy in removing paint and coatings.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: November 19, 2002
    Assignee: Huntsman Petrochemical Corporation
    Inventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum, Katty Darragas
  • Publication number: 20020160923
    Abstract: This invention relates to a method to facilitate the removal of adherent polymeric films from a hard surface occasioned by the evaporation of solvent from compositions containing an anionic amphiphilic polymer, the method comprising incorporating a phosphate ester surfactant into the compositions, and washing the film from the surface to which it adheres.
    Type: Application
    Filed: February 22, 2002
    Publication date: October 31, 2002
    Inventor: Stanley Pohl
  • Patent number: 6472357
    Abstract: An electronic parts cleaning solution comprising a hydroxide, water, metal corrosion inhibitor, and at least one compound represented by the following general formula (I) or (II): HO—((EO)x-(PO)y)z-H  (I) wherein, EO represents an oxyethylene group, PO represents an oxypropylene group, x and y represent integers satisfying the relation: x/(x+y)=0.05 to 0.4, and z represents a positive integer, R—[((EO)x-(PO)y)z-H]m  (II) wherein, EO, PO, x, y and z are the same as in the general formula (I), R represents a residual group obtained by removing a hydrogen atom on a hydroxyl group of alcohol or amine having a hydroxyl group, or a residual group obtained by removing a hydrogen atom on an amino group of amine, and m represents an integer of 1 or more.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: October 29, 2002
    Assignee: Sumitomo Chemical Company, Limited
    Inventor: Masayuki Takashima
  • Patent number: 6468952
    Abstract: An aqueous composition for plasticizing or softening paint, varnish and similar coatings prior to stripping the coating from a surface includes a combination of the active agents, e.g., triethylphosphate and a co-agent selected from dimethyl adipate, 1,2,3-propanetriol triacetate, tri-n-butyl citrate, n-octyl acetate, methyl octanoate and 2-ethyl-l-butanol; as an emulsified hydrophobic phase in which the actives are partitioned between the hydrophobic and aqueous phases. The emulsion is stabilized using a non-ionic water-soluble block copolymer surfactant, being a copolymer of more than one alkylene oxide. The composition may be thickened using rheology control agent. Synthetic smectic clays are particularly suitable. The composition is non-toxic and consists predominantly of water, and yet exhibits effective paint, varnish and lacquer plasticizing/softening.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: October 22, 2002
    Assignee: Eco Solutions Limited
    Inventor: Paul A. Reynolds
  • Patent number: 6465405
    Abstract: The present invention is directed to a paint stripping composition comprising (a) from about 0.5 to about 50% by weight of an aromatic alcohol, such as benzyl alcohol; (b) from about 0.5 to about 20% by weight of malic acid; and (c) from about 15 to about 60% by weight of water. The pH of the composition broadly ranges from about 2 to about 3. The stripping composition of the present invention is free of chlorinated solvents, environmentally safe, and user-friendly. It is non-corrosive or only slightly corrosive to substrates, non-flammable, non-toxic, flow odor, and fully biodegradable. A method of preparing the paint stripping composition is also provided.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: October 15, 2002
    Assignee: Napier Environmental Technologies, Inc.
    Inventor: Sergio Vitomir
  • Publication number: 20020144718
    Abstract: Paint residues may be removed from spraying equipment and the like by flushing with aqueous compositions containing alkoxylated aromatic alcohols wherein the aromatic ring moieties of such alcohols do not bear any alkyl substituent containing more than 4 carbon atoms. Preferably, the aqueous compositions also contain an alkanolamine or other base. The alkoxylated aromatic alcohols contain an average of at least about 2 oxyalkylene moieties (preferably, oxyethylene moieties) per molecule.
    Type: Application
    Filed: December 20, 2001
    Publication date: October 10, 2002
    Inventor: Neil R. Wilson
  • Patent number: 6462011
    Abstract: This application discloses a composition for and a method of using the composition to disperse hydrocarbon based components into a liquid carrier. The composition is comprised of a lower alkyl ester of a fixed oil, such as a modified vegetable oil, in combination with at least one other compound which enhances the ability of the ester to form an aqueous emulsion which can separate and which can alter the wetting character of the ester. The method comprises contacting a material comprised of hydrocarbon based components with an effective amount of composition for a time and a temperature sufficient to disperse the material into a liquid carrier.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: October 8, 2002
    Assignee: United Laboratories International, LLC
    Inventors: Bevan C. Collins, Larry D. Martin
  • Patent number: 6454870
    Abstract: A chromium oxide coating is removed from a surface of an article by cleaning the article in an alkaline degreasing/rust removal solution at a degreasing/rust removal temperature of from about 180° F. to about 200° F., scale conditioning the article in an alkaline permanganate conditioning solution at a scale-conditioning temperature of from about 160° F. to about 200° F., and contacting the article to an acidic stripping solution comprising hydrochloric acid and an etching inhibitor at a stripping temperature of from about 130° F. to about 140° F.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 24, 2002
    Assignee: General Electric Co.
    Inventor: William Clarke Brooks
  • Patent number: 6428628
    Abstract: A paint-removing method comprises the steps of putting dimethyl sulfoxide into a tank, raising the dimethyl sulfoxide at a temperature of approximately 35° C. to 189° C. in the tank; and soaking a member to be removed of paint into the dimethyl sulfoxide in the tank. The dimethyl sulfoxide is applying or blowing to a member to be removed of paint.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: August 6, 2002
    Inventor: Masao Umemoto
  • Patent number: 6419755
    Abstract: A chemical delacquering composition, process and system for delacquering substrates such as aluminum scrap in which an aqueous solution containing at least one short-chain organic acid, preferably a mixture of two short-chain organic acids, and optional components such as surfactants, are contacted onto the substrate(s) with application of heat and agitation. The invention embraces the use of one or more organic acids (carboxylic acids) having a total of 2-12 carbons, preferably 3-8 carbons. Concentration of organic acid by weight ranges from about 0.5-8% per at least one organic acid, or preferably 2-4% for each organic acid component assuming two organic acid components are present. In the preferred embodiment of the invention, about 2-4% each of citric and lactic acids are present in the delacquering composition. Processing temperatures range from 160-212° F., preferably 180-212° F., and most preferably 185-212° F.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 16, 2002
    Assignee: Alcoa Inc.
    Inventors: Doris Arruda, Kathleen M. Tomaswick
  • Patent number: 6420327
    Abstract: Coating remover compositions comprising an alkylene carbonate, hydrogen peroxide, water, a first alcohol, a second alcohol, and, optionally, pine oil that exhibit low toxicity. Further, a method of removing a coating from a surface. The method involves contacting a composition comprising an alkylene carbonate, hydrogen peroxide, water, a first alcohol, a second alcohol, and optionally, pine oil to a coated surface, and allowing the composition to contact the coated surface for a period of time, and under conditions effective to cause blistering of the coating. The compositions and method of the present invention are particularly suited for use with varnishes.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: July 16, 2002
    Assignee: Huntsman Petrochemical Corporation
    Inventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum, Howard P. Klein
  • Patent number: 6417149
    Abstract: A paint stripping composition comprising methyl benzoate and formic acid, as well as a method for using the foregoing composition in stripping paint from a substrate, are disclosed. The paint stripping composition may optionally also comprise thickeners, surfactants, and corrosion inhibitors. The composition and method are useful in stripping a variety of paints and similar organic coatings from both metallic and non-metallic substrates. Most preferably, the paint stripping composition does not comprise n-methyl-2-pyrrolidone.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: July 9, 2002
    Inventor: Gerald Wojcik
  • Patent number: 6380149
    Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: April 30, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Richard M. Flynn, George G. I. Moore, John G. Owens
  • Patent number: 6369009
    Abstract: This invention concerns a composition useful as a paint remover, comprising: alkylene carbonate such as propylene carbonate or ethylene carbonate, hydrogen peroxide, and water, and optionally an alcohol such as benzyl alcohol. In another broad respect, this invention concerns a process for removing paint, comprising: applying a composition containing alkylene carbonate, hydrogen peroxide, and water to a painted surface for a time and under conditions effective to cause blistering or bubbling of the paint. In another broad respect, this invention is a composition useful as a paint remover, comprising: dialkyl carbonate, hydrogen peroxide, and water, optionally containing an alcohol, optionally containing a glycol ether. In another broad respect, this invention is a process for removing paint, comprising: applying a composition containing dialkyl carbonate, hydrogen peroxide, and water to a painted surface for a time and under conditions effective to cause blistering or bubbling of the paint.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: April 9, 2002
    Assignee: Huntsman Petrochemical Corporation
    Inventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum
  • Patent number: 6369010
    Abstract: The present invention is a method and composition for preventing the deposition of contaminants from resinous pulp and/or recycled pulp in the press section of a pulp and paper process. The composition of the invention includes a cleaning solvent comprising a blend of aromatic hydrocarbons containing between nine and eleven carbon atoms and a surfactant comprising an alcohol ethoxylate. The composition of the invention can be applied to the felts in the press felt section of a pulp and paper process to break down and loosen deposited contaminants and the contaminants can be removed thereby preventing the need for batch cleaning and downtime in the press felt section.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: April 9, 2002
    Assignee: Vinings Industries, Inc.
    Inventors: David D. Dreisbach, Jeffrey N. Champine
  • Publication number: 20020035050
    Abstract: This invention provides an improved composition and process for pretreatment of aluminum prior to electroplating. The invention is an aqueous composition comprised of an acid, an oxidizing agent, and, optionally, a halogenated compound.
    Type: Application
    Filed: January 30, 2001
    Publication date: March 21, 2002
    Inventors: Maulik Dhanesh Mehta, Paul Andrew Butkovsky
  • Patent number: 6358901
    Abstract: The invention concerns a composition for stripping coatings for example of paints. Said composition comprises at least an aromatic ether containing an alkoxy group with at least two carbon atoms and at least an aprotic polar solvent.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: March 19, 2002
    Assignee: Rhodia Chimie
    Inventors: Jean-Luc Joye, Jean-Claude Galliot
  • Patent number: 6348107
    Abstract: A paint stripper for use by immersion of a painted substrate in a bath of the composition or application in place has two phases, one aqueous and the other of partially water soluble organic solvent. The aqueous phase is saturated with organic solvent. The organic solvent is preferably benzyl alcohol, dibasic ester or ethyl-e-ethoxypropionate, The total amount of organic solvent in the bath is suitably in the range 2 to 20%. The stripper may be acid or alkali activated. The application stripper is thickened to avoid separation during storage.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: February 19, 2002
    Assignee: Chemetall PLC
    Inventors: Colin Alfred Whitton, Joanna May Braley, Angela Mary Lawlor
  • Patent number: 6339053
    Abstract: An aqueous composition for softening or removing organic coatings comprises: (a) an effective amount of a mixture of (a1) at least one non-toxic compound of formula (I). Wherein R, R1 and R2 which may be the same or different, represent lower alkyl, phenyl or lower alkyl-phenyl groups (e.g. triethlyphosphate) and (a2) at least one non-toxic lower alkyl ester of a C2-20 carboxylic acid or at least one non-toxic C4-12 alkanol (e.g. diethyl succinate, diethyl succinate, diethyl adipate. 1,2,3-propanetriol triacetate, tri-n-butyl citrate, n-octyl acetate or methyl octanoate)(b) an effective amount of at least one surfactant to allow the composition to exist as a stable emulsion. The surfactant(s) being selected nonionic water-soluble block compolymers of more than one alkylene oxide (e.g.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: January 15, 2002
    Assignee: Eco Solutions Limited
    Inventors: Ivor M. Chivers, Paul A. Reynolds
  • Publication number: 20020000239
    Abstract: A stripping composition and a method of using the stripping composition to remove cured resins such as elastomeric silicone adhesive deposits from ceramic and metal surfaces of electronic modules to provide reworkability options in assembly processes including diagnostic parts, parts replacement and recovery of substrates from test vehicles is provided. The stripping compositions comprise a base preferably an organic base such as a quaternary ammonium hydroxide, a surfactant and a high boiling environmentally and chemically safe solvent such as di- or tri-propylene glycol alkyl ether. In another stripping composition, the base is used in combination with a mixture of N-alkyl pyrrolidone components, preferably an N-alkyl pyrrolidone and a N-cycloalkyl pyrrolidone. The stripping compositions are used to contact an electronic module having a cured resin such as a silicone adhesive residue deposit on the module surface to dissolve, remove or strip the deposit.
    Type: Application
    Filed: September 27, 1999
    Publication date: January 3, 2002
    Inventors: KRISHNA G. SACHDEV, UMAR M. AHMAD, FAREED Y. AUDI, DANIEL G. BERGER, JOHN U. KNICKERBOCKER, CHON C. LEI
  • Patent number: 6319884
    Abstract: Non-aqueous cleaning compositions capable of removing cured polyimides and other polymers from a metal circuitry containing substrate such as a semiconductor device for rework and other purposes without any significant adverse affect on the circuitry are provided consisting essentially of alkanolamines, preferably monoethanolamine or monoethanolamine-diethanolamine mixtures and optionally with a solvent such as NMP in an amount less than about 50% by weight. A method is also provided for removing polyimide coatings and other polymers from semiconductor devices using the cleaning compositions of the invention.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: November 20, 2001
    Assignee: International Business Machines Corporation
    Inventors: Marilyn R. Leduc, Harold G. Linde, Gary P. Viens
  • Patent number: 6303552
    Abstract: The present invention is directed to an aerosol composition comprising (A) a paint stripper composition comprising (i) from about 20 to about 50% by weight of an aromatic alcohol, such as benzyl alcohol, (ii) from about 5 to about 50% by weight of an accelerator, (iii) from about 0.5 to about 5.0% by weight of water, based upon 100% weight of total paint stripper composition; and (B) a propellant. A method of preparing the aerosol composition is also provided.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: October 16, 2001
    Assignee: Napier International Technologies, Inc.
    Inventor: Sergio Vitomir
  • Patent number: 6297308
    Abstract: Described are chemical compositions comprising a fluorinated solvent and a nonionic, poly-fluoroalkyl, hydroxy-substituted surfactant.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: October 2, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Chetan P. Jariwala, Henry C. Chang, David S. Hill
  • Patent number: 6296718
    Abstract: A method of stripping cured paint from reject painted production parts, aluminum and galvanized safe, comprising: a) adding a stripping composition to a strip tank, said stripping composition consisting an alkanolamine, a fatty acid and a surfactant; b) immersing said reject painted part in said strip tank containing said stripping composition; and c) heating said stripping composition to 300 degrees F. for approximately 1-hour, wherein cured paint is removed from said reject painted part with no attack on the base metal substrate.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: October 2, 2001
    Inventor: Samuel Lee Miles
  • Patent number: 6291417
    Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: September 18, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Richard M. Flynn, George G. I. Moore, John G. Owens
  • Patent number: 6239090
    Abstract: A thickened composition and process useful for removing paint, comprising: a carbonate such as propylene carbonate or ethylene carbonate, a thickener such as polyvinyl pyrrolidone (PVP), hydrogen peroxide and water. The composition may include additional cosolvents such as glycol ethers and alcohols such as benzyl alcohol, and/or dibasic ester (DBE).
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: May 29, 2001
    Assignee: Huntsman Petrochemical Corporation
    Inventors: Edward T. Marquis, Robert E. Baldwin, James R. Machac, Jr., Katty Darragas, Susan Aileen Woodrum
  • Patent number: 6239096
    Abstract: A powdered abrasive cleanser that exhibits superior soil removal properties and surface safety is provided. The cleanser includes a surfactant, an optional source of active chlorine, a borax pentahydrate compound that is preferably sodium tetraborate pentahydrate, and optionally an alkaline detergent builder and/or calcium carbonate.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: May 29, 2001
    Assignee: The Clorox Company
    Inventors: Robert L. Blum, Denise A. Garner, Carl M. Kling
  • Patent number: 6231678
    Abstract: A chemical delacquering composition, process and system for delacquering substrates such as aluminum scrap in which an aqueous solution containing at least one short-chain organic acid, preferably a mixture of two short-chain organic acids, and optional components such as surfactants, are contacted onto the substrate(s) with application of heat and agitation. The invention embraces the use of one or more organic acids (carboxylic acids) having a total of 2-12 carbons, preferably 3-8 carbons. Concentration of organic acid by weight ranges from about 0.5-8% per at least one organic acid, or preferably 2-4% for each organic acid component assuming two organic acid components are present. In the preferred embodiment of the invention, about 2-4% each of citric and lactic acids are present in the delacquering composition. Processing temperatures range from 160-212° F., preferably 180-212° F., and most preferably 185-212° F.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: May 15, 2001
    Assignee: Alcoa Inc.
    Inventors: Doris Arruda, Kathleen M. Tomaswick
  • Patent number: 6228179
    Abstract: A surface treatment composition containing a complexing agent as a metal deposition preventive in a liquid medium, in which the complexing agent is an ethylenediaminephenol derivative of the following general formula (1) or its salt: wherein X1 and X2 are hydroxyl groups; Y1 to Y8 are respectively independently a hydrogen atom, a hydroxyl group, a halogen atom, a carboxyl group, a phosphonic acid group, a sulfonic acid group, a carbonyl group, a nitro group, a nitroso group, an amino group, an imino group, a nitrilo group, a nitrile group, a thiocyanate group, a hydroxyamino group, a hydroxyimino group, or an alkyl or alkoxy group which may have a substituent, provided that at least one of Y1 to Y8 is not a hydrogen atom; Z1 to Z4 are respectively independently a hydrogen atom, a carboxyl group or a sulfonic acid group; and R1 to R4 are respectively independently a hydrogen atom or an alkyl group which may have a substituent.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: May 8, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Hitoshi Morinaga
  • Patent number: 6228823
    Abstract: A method for treating the surface of a substrate with a surface treatment composition, wherein the surface treatment composition comprises a liquid medium containing a complexing agent as a metal deposition preventive, the complexing agent comprising at least one member selected from Group A complexing agents and at least one member selected from Group B complexing agents defined hereinafter.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: May 8, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hitoshi Morinaga, Masaya Fujisue
  • Patent number: 6200940
    Abstract: The present invention is directed to apaint stripping composition comprising (a) from about 0.5 to about 50% by weight of an aromatic alcohol, such as benzyl alcohol; (b) from about 0.5 to about 20% by weight of malic acid; and (c) from about 15 to about 60% by weight of water. The pH of the composition broadly ranges from about 2 to about 3. The stripping composition of the present invention is free of chlorinated solvents, environmentally safe, and user-friendly. It is non-corrosive or only slightly corrosive to substrates, non-flammable, non-toxic, low odor, and fully biodegradable. A method of preparing the paint stripping composition is also provided.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: March 13, 2001
    Assignee: Napier International Technologies, Inc.
    Inventor: Sergio Vitomir
  • Patent number: 6191086
    Abstract: Non-corrosive cleaning compositions that are aqueous based and useful for removing photoresist, plasma etch and CMP residues from a substrate. One preferred cleaning composition comprises: (i) a hydroxylamine or a hydroxylamine salt compound; (ii) at least one fluorine-containing compound; and (iii) water. Another cleaning composition comprises: (i) a compound selected from the group consisting of: an amine, a quatenary ammonium hydroxide, and ammonium hydroxide; (ii) at least one fluorine-containing compound; and (iii) water.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: February 20, 2001
    Assignee: Arch Specialty Chemicals, Inc.
    Inventors: Vincent G. Leon, Kenji Honda, Eugene F. Rothgery
  • Patent number: 6187736
    Abstract: A solvent mixture comprising an alcohol, an aromatic hydrocarbon or an organic compound containing carboxyl but not hydroxyl moieties, and optionally and preferably a non-aromatic hydrocarbon or halohydrocarbon is particularly effective in removing incompletely cured residues of a variety of sealing compounds from the surfaces of automobile bodies, without damaging intermediate or final finish coatings for the automobile bodies. The solvent mixture may advantageously be absorbed in a wiping cloth for convenient use.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: February 13, 2001
    Assignee: Henkel Corporation
    Inventor: Chester P. Jarema
  • Patent number: 6187108
    Abstract: Process useful to clean and remove uncured resins. The resins to be treaded include epoxy, polyester (fiberglass) and polyurethane foam. The compositions include alkylene carbonate, including propylene and ethylene carbonate.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: February 13, 2001
    Assignee: Huntsman Petrochemical Corporation
    Inventors: James R. Machac, Jr., Edward T. Marquis