Aqueous Component Patents (Class 510/206)
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Patent number: 6602835Abstract: 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: GrantFiled: July 31, 2002Date of Patent: August 5, 2003Assignee: Pennzoil-Quaker State CompanyInventors: Michael Schmeida, Brian Sokol
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Publication number: 20030119688Abstract: The use of alkoxylated alkyl alcohols having 8 to 18 carbon atoms in the alkyl radical and with a total of 2 to 12 ethylene oxide and/or propylene oxide units per molecule as additive for paint stripper based on organic solvents, the paint stripper containing less than 5 wt. % of water; corresponding paint strippers based on alcoholic organic solvents; paint stripping process using these agents, particularly for non-ferrous metals.Type: ApplicationFiled: December 13, 2002Publication date: June 26, 2003Inventors: Hans-Joergen Rehm, Brigitte Spei
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Publication number: 20030119686Abstract: This invention concerns a composition useful as a paint remover, comprising: an organic carbonate, an alcohol, an activator, hydrogen peroxide, and water. The alcohol may be benzyl alcohol. The organic carbonate may be propylene carbonate, ethylene carbonate, or combination thereof. The activator may be an alkyl-substituted cycloalkane (naphthene), a soy oil, an alkyl soyate, or combination thereof.Type: ApplicationFiled: August 20, 2002Publication date: June 26, 2003Inventors: James R. Machac, Edward T. Marquis, Susan A. Woodrum
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Patent number: 6562296Abstract: The present invention relates to the use of a cleaning composition concentrate in particular for the mechanical cleaning of medical and/or surgical instruments and/or apparatuses and to a process for carrying out this cleaning.Type: GrantFiled: April 5, 2000Date of Patent: May 13, 2003Assignee: Chemische Fabrik Dr. Weigert GmbH & Co. KGInventors: Petra Tiarks, Jürgen Staffeldt
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Patent number: 6534461Abstract: 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: GrantFiled: May 29, 2001Date of Patent: March 18, 2003Assignee: ATOFINAInventor: Jean-Pierre Lallier
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Patent number: 6479445Abstract: This invention concerns a composition useful as a paint remover, comprising: an organic carbonate, an alcohol, an activator, hydrogen peroxide, and water. The alcohol may be benzyl alcohol. The organic carbonate may be propylene carbonate, ethylene carbonate, or combination thereof. The activator may be an alkyl-substituted cycloalkane (naphthene), a soy oil, an alkyl soyate, or combination thereof.Type: GrantFiled: September 1, 2000Date of Patent: November 12, 2002Assignee: Huntsman Petrochemical CorporationInventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum
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Patent number: 6472027Abstract: A UV cured floor finish can be removed from a floor by applying to the cured finish an inhomogeneous stripper composition containing at least one polar solvent, allowing the stripper composition to contact the finish for sufficient time to soften the finish, and removing the softened finish from the floor by mopping, vacuuming, mild abrasion or other measures that do not remove substantial portions of the floor. Preferably the polar solvent is denser than water and preferably the stripper composition has a diffusion rate through the cured finish greater than about 7×10−7 g/cm2/sec. Strippable-floor finish kits can be manufactured by combining a UV curable floor finish composition and an inhomogeneous stripper composition containing at least one polar solvent.Type: GrantFiled: August 18, 2000Date of Patent: October 29, 2002Inventors: Keith E. Olson, Bryan M. Anderson, Kim R. Smith
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Patent number: 6468952Abstract: 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: GrantFiled: November 22, 2000Date of Patent: October 22, 2002Assignee: Eco Solutions LimitedInventor: Paul A. Reynolds
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Patent number: 6465405Abstract: 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: GrantFiled: August 11, 2000Date of Patent: October 15, 2002Assignee: Napier Environmental Technologies, Inc.Inventor: Sergio Vitomir
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Patent number: 6420327Abstract: 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: GrantFiled: August 9, 2000Date of Patent: July 16, 2002Assignee: Huntsman Petrochemical CorporationInventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum, Howard P. Klein
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Patent number: 6395103Abstract: A composition useful as a paint remover which may include a carbonate, a dibasic ester and a mono-ester. The paint stripping 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. A degreasing composition is also disclosed which may comprise a carbonate and a alkyl-substituted cyclo-alkane such as naphthene. The compositions have several important attributes, including low toxicity and high efficacy in removing paint and coatings.Type: GrantFiled: September 1, 2000Date of Patent: May 28, 2002Assignee: Huntsman Petrochemical CorporationInventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum
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Patent number: 6372050Abstract: A non-corrosive photoresist stripping and cleaning composition, comprising: (a) about 5% to about 50% of a solvent; (b) about 10% to about 90% of an alkanolamine; (c) about 0.1 to 10% of a carboxylic acid; and (d) about 1.0% to 40% of water.Type: GrantFiled: June 7, 2001Date of Patent: April 16, 2002Assignee: Arch Specialty Chemicals, Inc.Inventors: Kenji Honda, Richard Mark Molin, Gale Lynne Hansen
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Patent number: 6369009Abstract: 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: GrantFiled: November 28, 2000Date of Patent: April 9, 2002Assignee: Huntsman Petrochemical CorporationInventors: James R. Machac, Jr., Edward T. Marquis, Susan A. Woodrum
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Patent number: 6369010Abstract: 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: GrantFiled: December 1, 1999Date of Patent: April 9, 2002Assignee: Vinings Industries, Inc.Inventors: David D. Dreisbach, Jeffrey N. Champine
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Patent number: 6348107Abstract: 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: GrantFiled: April 19, 1999Date of Patent: February 19, 2002Assignee: Chemetall PLCInventors: Colin Alfred Whitton, Joanna May Braley, Angela Mary Lawlor
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Patent number: 6339053Abstract: 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: GrantFiled: November 16, 2000Date of Patent: January 15, 2002Assignee: Eco Solutions LimitedInventors: Ivor M. Chivers, Paul A. Reynolds
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Patent number: 6303552Abstract: 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: GrantFiled: August 4, 1999Date of Patent: October 16, 2001Assignee: Napier International Technologies, Inc.Inventor: Sergio Vitomir
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Patent number: 6268323Abstract: A non-corrosive photoresist stripping and cleaning composition, comprising: (a) about 5% to about 50% of a solvent; (b) about 10% to about 90% of an alkanolamine; (c) about 0.1 to 10 % of a carboxylic acid; and (d) about 1.0% to 40% of water.Type: GrantFiled: August 18, 1998Date of Patent: July 31, 2001Assignee: Arch Specialty Chemicals, Inc.Inventors: Kenji Honda, Richard Mark Molin, Gale Lynne Hansen
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Patent number: 6200940Abstract: 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: GrantFiled: July 19, 1999Date of Patent: March 13, 2001Assignee: Napier International Technologies, Inc.Inventor: Sergio Vitomir
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Patent number: 6187108Abstract: 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: GrantFiled: November 4, 1999Date of Patent: February 13, 2001Assignee: Huntsman Petrochemical CorporationInventors: James R. Machac, Jr., Edward T. Marquis
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Patent number: 6174847Abstract: This composition for stripping paints, lacquers or primers is characterized in that it consists of or comprises: (A) 5 to 90 parts by weight of water; (B) 2 to 47.5 parts by weight of benzyl alcohol; (C) 2 to 47.5 parts by weight of dimethyl sulphoxide or N-methylpyrrolidone, (A)+(B)+(C) representing 100 parts by weight.Type: GrantFiled: December 8, 1997Date of Patent: January 16, 2001Assignee: Elf Atochem, S.A.Inventor: Jean-Pierre Lallier
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Patent number: 6165957Abstract: A method of preparing an environmentally safe composition free of chlorinated solvents which is non-flammable, fully biodegradable, and low odor and the use of such composition for the removal of various coatings from metal substrates. The composition comprises a water-based mixture of one or more high boiling, high flash aromatic solvents (benzyl alcohol, benzyl ether, 1-phenoxy-2-propanol), a peroxide generating agent (hydrogen peroxide), and a hydroxycarboxylic acid (glycolic acid). It can be prepared as a liquid and used as such for immersion/dipping operations or as a thick paste "cling-type" material when optimal application requires a thin film. These can be applied by spraying or brushing.Type: GrantFiled: June 21, 1999Date of Patent: December 26, 2000Assignee: Napier International Technologies Inc.Inventor: Sergio Vitomir
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Patent number: 6165962Abstract: A microemulsion comprising: a functionalized hydrocarbon, an anionic surfactant, a diol having from 2 to 10 carbon atoms and water.Type: GrantFiled: March 30, 1998Date of Patent: December 26, 2000Assignees: E. I. du Pont de Nemours and Comapny, The University of DelawareInventors: Eric W. Kaler, Timothy Donald Krizan, Larry D. Ryan, Martin Swanson Vethamuthu
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Patent number: 6162776Abstract: 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: GrantFiled: October 12, 1999Date of Patent: December 19, 2000Assignee: Huntsman Petrochemical CorporationInventors: Edward T. Marquis, Robert E. Baldwin
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Patent number: 6153573Abstract: A predominantly aqueous composition for plasticising or softening paint, varnish and similar coatings prior to stripping the coating from a surface includes preferably a combination of the active agents 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 preferably stabilized using a non-ionic water-soluble block copolymer surfactant, being a copolymer of more than one alkaline oxide. The composition may be thickened using a 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 plasticising/softening characteristics.Type: GrantFiled: September 11, 1998Date of Patent: November 28, 2000Assignee: Eco Solutions LimitedInventor: Paul A. Reynolds
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Patent number: 6129847Abstract: Magnetic powder and substrate material are separately recovered from finely chopped wastes of magnetic recording media consisting of a polymeric substrate and a magnetic layer present thereon in which finely divided magnetic powder is dispersed in crosslinked or uncrosslinked polymeric binder by treating the finely chopped wastes of magnetic recording media in a solution consisting of the potassium salt of a polyunsaturated fatty acid, or a biodegradable cleaning agent comprising phosphates, surfactants and a complexing agent, and one or more organic solvents or water while being subjected to mechanical action, and separately removing the magnetic powder from the substrate material by washing or sedimentation or in a magnetic separator.Type: GrantFiled: September 9, 1996Date of Patent: October 10, 2000Assignee: BASF Magnetics GmbHInventors: Thomas Wunsch, Karl-Heinz Sartor, Axel-Rudiger Schulze, Norbert Muller, Jochen Eicher, Oskar Stephan
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Patent number: 6080709Abstract: The present invention relates to a cleaning solution for cleaning substrates, to which a metallic wiring has been applied, being capable of easily removing the metallic impurities of the substrate surface without corroding the metal, not putting a strain on the environment, and not causing a shelf life problem.The cleaning solution comprising at least one member selected from a group consisting of oxalic acid, ammonium oxalate and polyaminocarboxylic acids, but contains no hydrogen fluoride.Type: GrantFiled: August 11, 1998Date of Patent: June 27, 2000Assignees: Kanto Kagaku Kabushiki Kaisha, NEC CorporationInventors: Norio Ishikawa, Kiyoto Mori, Hidemitsu Aoki
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Patent number: 6048828Abstract: A composition is provided which has been formulated to render non-hazardous surfaces which are coated with lead-based paints or surface soil which is contaminated with lead compounds. The composition is an aqueous mixture comprising hydrogen peroxide, ammonium hydroxide, nitric acid and acetic acid. The composition is effective on surfaces which may be comprised of wood, metal, concrete, wallboard or plaster without destroying the integrity of these surfaces.Type: GrantFiled: December 24, 1997Date of Patent: April 11, 2000Inventors: Joseph Zelez, Anthony Peter Balestrieri, Robert Howard
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Patent number: 6040285Abstract: This composition for stripping paints, varnishes or lacquers coating a substrate is characterized in that it consists of or comprises:(A) 1 to 100 parts by weight of a mixture (A1) of at least one aromatic solvent chosen from benzaldehyde, toluene, xylene and anisole and (A2) of benzoic acid;(B) 99 to 0 parts by weight of water;(A)+(B) representing in total 100 parts by weight.In particular, (A) consists of a commercial benzaldehyde which contains benzoic acid.Type: GrantFiled: December 8, 1997Date of Patent: March 21, 2000Assignee: Elf Atochem, S.A.Inventors: Jean-Pierre Lallier, Patrick Marie, Jean-Marie Aubry, Marie-Jose Marti, Valerie Del Nero
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Patent number: 6017863Abstract: An alkaline, aqueous cleaning solution which is capable of removing at least a substantial portion of uncured adhesive residues, e.g., epoxy-based adhesives, from a substrate, preferably a metal stencil substrate, contains water, an alkalinity-providing agent and a synergistic combination of surfactants, specifically an N-alkylpyrrolidone surfactant, which is preferably N-octyl-2-pyrrolidone, and an aminocarboxylic acid surfactant, which is preferably N-coco-beta-aminopropionic acid. At an active-concentration ratio of the N-alkyl-2-pyrrolidone surfactant to the aminocarboxylic acid surfactant of from about 1:1 to about 3.5:1 and a total active concentration of at least 0.30% by weight of the aqueous cleaning solution, the N-alkyl-2-pyrrolidone and aminocarboxylic acid surfactants synergistically improve the ability of the solution to remove uncured adhesive residues from the substrate, even at relatively low wash temperatures, e.g., from about 70.degree. F. to less than about 135.degree. F.Type: GrantFiled: May 22, 1998Date of Patent: January 25, 2000Assignee: Church & Dwight Co., Inc.Inventors: Frank Cala, Alfredo Vinci
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Patent number: 5994282Abstract: Stripping compositions based on a polar aprotic solvent, an ether and water. The composition is characterized in that it comprises at least the following: 1) a polar aprotic solvent, especially dimethyl sulfoxide (DMSO) or N-methyl pyrrolidinone (NMP); 2) an ether chosen from anisole and tetrahydrofuran (THF); 3) water.Type: GrantFiled: May 30, 1997Date of Patent: November 30, 1999Assignee: Elf Atochem, S.A.Inventor: Jean-Pierre Lallier
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Patent number: 5990072Abstract: A terpene-free hard surface cleaning composition containing: (a) a nonionic surfactant; (b) an anionic surfactant; (c) a primary solvent consisting of a C.sub.6 -C.sub.14 methyl ester; (d) a short-chain cosurfactant; and (e) water, all weights being based on the total weight of the composition.Type: GrantFiled: February 8, 1999Date of Patent: November 23, 1999Assignee: Henkel CorporationInventors: Stephen F. Gross, Martin J. Barabash, J. Frederick Hessel
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Patent number: 5990063Abstract: The present invention is related to a stripping composition for paints, varnishes or lacquers. This composition contains at least water and anisole.Type: GrantFiled: May 30, 1997Date of Patent: November 23, 1999Assignee: Elf Atochem S.A.Inventor: Jean-Pierre Lallier
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Patent number: 5990062Abstract: A paint-stripping composition comprises, on a weight basis, at least 20% of a benzyl alcohol, together with 5-30% of methylene chloride, 1-10% of hydrogen peroxide and 10-60% of water. The composition may also include auxiliary ingredients such as thickeners, evaporation retardants, surfactants, pH control agents, accelerators, corrosion inhibitors, preservatives, coloring agents, and fragrances.Type: GrantFiled: December 19, 1997Date of Patent: November 23, 1999Assignee: Gage Products CompanyInventors: Stephen R. Summerfield, Matthew W. Clark, Neil R. Wilson, Michael E. Moore, Thomas A. Vivian, Scott A. Hofacker
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Patent number: 5977042Abstract: The present invention is directed to a composition for stripping coatings from a surface, the composition including:a. A solvent mixture composed of a phenyl substituted alkyl alcohol and an alkyl or aryl glycol ether or an alkyl or aromatic alcohol;b. A coupler composed of a salt formed from a water soluble organic amine and an acid comprising at least one C7-C18 ethoxylated anionic surfactant;c. Optionally water.The use of the C7-C18 ethoxylated anionic surfactant provides a stripper which can be diluted in water of various compositions yet provide an effective stripping/cleaning agent.Type: GrantFiled: October 1, 1998Date of Patent: November 2, 1999Assignee: S. C. Johnson Commercial Markets, Inc.Inventors: Paul M. Hernandez, Lance D. Brown
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Patent number: 5972865Abstract: A purge concentrate for purging paint spraying and other coating equipment has about 20%-60% by weight water; about 10%-40% by weight of an active solvent; about 10%-50% by weight of a co-solvent; about 1-9% by weight of a penetrant; and about 0.2-2.0% by weight wetting agent. It need not be heated to the curing temperature of heat curing paints and thus purges these paints more effectively.Type: GrantFiled: April 30, 1998Date of Patent: October 26, 1999Assignee: Dalco Industries, Ltd.Inventors: Richard E. Knipe, Jr., Savarimuthu M. Jacob, Sheldon Green
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Patent number: 5955410Abstract: Various cleaning compositions useful in cleaning oil and carbon residue encrusted metallic surfaces are described. The specific formulations of the present invention may include a variety of non-corrosive and non-hazardous materials which include an aliphatic ether of a propylene glycol and/or an ester thereof, an alkanolamine, an aliphatic fatty acid blend, an alkyl pyrrolidone, water and, in some applications, a mild caustic such as ammonium hydroxide, for example. The various formulations of the present invention combine their ability to dissolve or emulsify a combination of deposits commonly found on auto and aircraft engines and the like. These formulations are most effective in removing or dissolving soils, such as oils, greases, varnishes and like residue from oil, fuel, solvents and other sources.Type: GrantFiled: March 23, 1993Date of Patent: September 21, 1999Assignee: Safety-KleenInventors: John A. Dingess, Frank A. Osmanski
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Patent number: 5876509Abstract: A cleaning solution of a semiconductor device is composed of aqueous ammonia (NH.sub.4 OH), methanol (CH.sub.3 OH), hydrofluoric acid (HF) and deionized water (DI--H.sub.2 O), the volume ratio of NH.sub.4 OH to CH.sub.3 OH to DI--H.sub.2 O being 1:1-50:0.1-50, and the volume of HF being 1-10,000 ppm with respect to the mixture solution of NH.sub.4 OH, CH.sub.3 OH and DI--H.sub.2 O. The cleaning solution can be manufactured by simply mixing the respective compositions. The cleaning solution can strip polymers and particles within a short time, without etching or damaging the cleaned metal layers. Since the cleaning process of a semiconductor device is simplified, the processing cost is reduced and the yield and reliability are improved.Type: GrantFiled: August 15, 1996Date of Patent: March 2, 1999Assignee: Samsung Electronics Co., Ltd.Inventor: Jae-woo Nam
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Patent number: 5866523Abstract: A cleaning composition and method of use are disclosed. The composition comprises a mixture of a ketone, at least one glycol ether, water and optionally a surfactant. The composition when applied to substrates coated with resinous coatings is effective for removing the coating from the substrate.Type: GrantFiled: November 14, 1997Date of Patent: February 2, 1999Assignee: BetzDearborn Inc.Inventors: Umit Turunc, Patricia A. Popowich
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Patent number: 5858940Abstract: A hardened image is removed from printing plates by a solution of formic acid and hydrofluoric acid. In one embodiment, the solution further includes a buffer solution to maintain the oleophilic properties of the substrate for printing.Type: GrantFiled: May 6, 1997Date of Patent: January 12, 1999Inventor: James L. Orcutt
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Patent number: 5854188Abstract: Improvements in the rate of stripping of alkaline water-in-oil emulsions by incorporating in the organic phase thereof an effective amount of pyrrole.Type: GrantFiled: February 25, 1997Date of Patent: December 29, 1998Assignee: Elf Atochem North America, Inc.Inventors: John Distaso, Azucena G. De Guzman
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Patent number: 5851972Abstract: Improvements in the rate of stripping of benzyl alcohol containing water-in-oil emulsions by incorporating in the organic phase thereof an effective amount of anisole.Type: GrantFiled: February 25, 1997Date of Patent: December 22, 1998Assignee: Elf Atochem North America, Inc.Inventors: John Distaso, Azucena G. De Guzman
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Patent number: 5830836Abstract: Compositions and methods for removal of polymeric coatings from nonporous surfaces are provided. The method comprises the mixing of two stock solutions, a peroxide/acid solution and an alkaline solution, and immediate application to the surface to be stripped of coating. The applied mixture produces a controlled peroxide oxidation reaction causing the coating to become softened-to-release. A further step of washing or blowing with water, air, cornstarch, or plastic media will remove the softened-to-release coating. The two stock solutions are stable to storage and, when in use, are continuously mixed in a volume so as to control reaction rate, pH, corrosivity of the coating remover, and reaction rate with the coating.Type: GrantFiled: October 27, 1995Date of Patent: November 3, 1998Assignee: Eldorado Chemical Co., Inc.Inventors: Pat E. Smith, John M. Jasper, William R. Zinnecker, Joe R. Fredricksen
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Patent number: 5821209Abstract: Improvements in the retardation of water evaporation from benzyl alcohol containing water-in-oil emulsions by incorporating in the organic phase thereof an effective amount of a terpene.Type: GrantFiled: February 25, 1997Date of Patent: October 13, 1998Assignee: Elf Atochem North America, Inc.Inventors: John Distaso, Azucena G. De Guzman
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Patent number: 5817612Abstract: Aqueous paint stripper formulations containing a solvent system comprised of an ester such as benzyl formate and methods for using the same to strip paint.Type: GrantFiled: December 23, 1996Date of Patent: October 6, 1998Assignee: Elf Atochem North America, Inc.Inventor: John Distaso
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Patent number: 5798325Abstract: An improved aqueous liquid composition for power washing of paint masks contains: organic film-forming polymer, preferably polyacrylamide; inorganic salts, preferably a combination of alkali metal pyrophosphate, metaborate, and tetraborate; and dissolved organic molecules that (i) are hydrocarbons except for having hydroxyl substituents and, optionally, having one or more other types of substituents selected from halogen atoms, keto groups, and aldehydo groups and (ii) have a number ratio of oxygen atoms to carbon atoms that is at least 0.5; and, optionally but preferably, free boric acid.Type: GrantFiled: January 24, 1997Date of Patent: August 25, 1998Assignee: Henkel CorporationInventor: Scott J. Beleck
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Patent number: 5769959Abstract: Insoluble polymer formed during the distillation of N-vinylformamide is removed by contacting the insoluble polymer with an aqueous weakly basis solution in a closed system at elevated temperature. Polymer (up to 50 wt % polymer gel or 5.5 wt % dry polymer in reaction mixture) is treated with an aqueous solution of an amine, alkanolamine or weak inorganic base having a concentration of at least 1 molar. Solvents like alcohols, glycol ethers or amides may be added as a cosolvent in an amount of from 0 to about 85% by weight.Type: GrantFiled: April 4, 1995Date of Patent: June 23, 1998Assignee: Mitsubishi Chemical CorporationInventors: Thomas Albert Johnson, Malee Leeaphon
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Patent number: 5763377Abstract: Methods and compositions useful for removing a titanium dioxide-containing material located on a surface, for example, a surface of a piece of process equipment, are disclosed. In one embodiment, the present methods provide for contacting the titanium dioxide-containing material located on the surface with a composition comprising at least about 20% by weight of water, an acid component in an amount effective to reduce the adhesion between the titanium dioxide-containing material and the surface; and an organic component in an amount effective to disperse the titanium dioxide-containing material in the composition.Type: GrantFiled: June 17, 1996Date of Patent: June 9, 1998Assignee: Dober Chemical CorporationInventors: Daniel J. Dobrez, Mark R. Lalinsky, Robert J. Rybarski
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Patent number: 5763375Abstract: A cleaning agent characterized in that the agent comprises 0.1 to 4 wt. % of hydrofluoric acid, a surfactant of the following formula (1) in a concentration of 50 to 1500 ppm or a surfactant of the following formula (2) or (3) in a concentration of 50 to 100000 ppm, and the balance water, and a cleaning method of the surfaces of silicon wafers and the like using the agentRfCOONH.sub.4 (1)wherein Rf is a fluorine-containing hydrocarbon group having 5 to 9 carbon atomsRf'O(CH.sub.2 CH.sub.2 O)nR (2)Rf'(CH.sub.2 CH.sub.2 O)nR (3)wherein Rf' is a fluorine-containing hydrocarbon group having 5 to 15 carbon atoms, R is hydrogen or alkyl having 1 to 4 carbon atoms, and n is 5 to 20.Type: GrantFiled: July 24, 1996Date of Patent: June 9, 1998Assignee: Daikin Industries, Ltd.Inventors: Takehiko Kezuka, Mitsushi Itano, Motonobu Kubo
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Patent number: RE37849Abstract: Composition for removing coatings from surfaces consisting essentially of at least one dibasic ester, water, and at least one thickening agent. The composition contains sufficient water and thickening agent to allow it to wet out and adhere to vertical surfaces for a sufficiently long period to insure that the dibasic ester component will have sufficient duration of contact with the coating to allow easy removal of same.Type: GrantFiled: July 2, 1992Date of Patent: September 17, 2002Assignee: 3M Innovative Properties CompanyInventor: Richard J. Pokorny