Water Containing Patents (Class 106/238)
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Patent number: 4822426Abstract: A primer comprising at least one member selected from organometallic compounds, natural resins and synthetic resins and at least one fluorine-containing compound of a specific type, which is particularly useful in bonding non-polar or highly crystalline substrates together or bonding another material to the resin substrate.Type: GrantFiled: November 12, 1986Date of Patent: April 18, 1989Assignee: Toagosei Chemical Industry Co., Ltd.Inventors: Kenji Ito, Kaoru Kimura
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Aqueous dispersions, a process for their preparation and the use of the dispersions as sizing agents
Patent number: 4816073Abstract: Aqueous dispersions of rosin and synthetic sizing agent wherein the particles in the dispersed phase contain a mixture of rosin and the synthetic sizing agent and wherein the dispersions contain a polyaluminum compound. The dispersions are prepared by homogenization of a homogenous mixture of rosin material and the synthetic sizing agent and the polyaluminum compound can either be present at the production or be added to an aqueous dispersion of mixed particles. The dispersions are used as sizing agents at the production of paper, paper board, board and similar products.Type: GrantFiled: December 24, 1987Date of Patent: March 28, 1989Assignee: Casco Nobel ABInventors: Ulla Helmer, Randi Johansen, Ulf Carlson -
Aqueous dispersions, a process for their preparation and the use of the dispersions as sizing agents
Patent number: 4743303Abstract: Aqueous cationic or anionic dispersions of rosin and certain synthetic sizing agents, carbamoyl chlorides, ketene dimers or acid anhydrides. The particles in the dispersed phase contain a mixture of rosin and synthetic sizing agent and the dispersions are prepared by homogenisation of a homogeneous mixture of the rosin material and the synthetic sizing agent in the presence of a dispersing agent. The dispersions are used as sizing agents in the production of paper, paper board, board and similar products.Type: GrantFiled: July 2, 1986Date of Patent: May 10, 1988Assignee: Casco Nobel ABInventors: Ulla Helmer, Randi Johansen -
Patent number: 4735830Abstract: The invention relates to a new primer for pretreating glass in readiness for waterproof bonding to other substrates. The primer contains resins, functional silanes, solvents, and organosilazanes and, if desired, polyfunctional isocyanates and other additives. Compared with conventional primers, the resistance of the bond to hydrolysis is significantly improved.Type: GrantFiled: February 6, 1987Date of Patent: April 5, 1988Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Riza N. Oezelli, Hans-Josef Hoffman, Hans-Peter Kohlstadt
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Patent number: 4699663Abstract: An improved sizing composition resistant to hard water precipitation comprises a first component containing a reaction product of urea and an aminocarboxylic acid and a second component comprising a rosin. A process for preparing the improved sizing composition is also disclosed.Type: GrantFiled: June 24, 1986Date of Patent: October 13, 1987Assignee: Reichhold Chemicals, Inc.Inventor: George F. Feeney, III
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Patent number: 4670057Abstract: The invention relates to a new primer for pretreating glass in readiness for waterproof bonding to other substrates. The primer contains resins, functional silanes, solvents, and organosilazanes and, if desired, polyfunctional isocyanates and other additives. Compared with conventional primers, the resistance of the bond to hydrolysis is significantly improved.Type: GrantFiled: January 8, 1985Date of Patent: June 2, 1987Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Riza N. Oezelli, Hans-Josef Hoffmann, Hans-Peter Kohlstadt
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Patent number: 4605445Abstract: A tall oil rosin paper sizing composition comprising a homogeneous aqueous liquid which is fully miscible with water at 5.degree. C. On a solids basis, the composition contains between about 15% and about 75% by weight of an alkali metal soap of a condensation product of tall oil rosin and an aldehyde, and between about 85% and about 25% by weight urea. Also disclosed are methods for preparation and use of the novel paper sizing composition.Type: GrantFiled: March 8, 1985Date of Patent: August 12, 1986Assignee: Monsanto CompanyInventors: Steven Abell, Thomas L. Peltier
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Patent number: 4591412Abstract: A composition of matter for the neutral sizing of paper, paperboard, cardboard and other cellulose containing materials, is disclosed comprising water; a solvent which is unlimitedly miscible with water, particularly alcohol; a compound which undergoes a basic reaction; alkali aluminate; and a sizing component. When sizing is effected with this agent, the fiber containing suspension is mixed with a retention agent, before or after the addition of the sizing agent, with the sizing agent being activated by way of neutralization.Type: GrantFiled: December 8, 1983Date of Patent: May 27, 1986Assignee: Giulini Chemie GmbHInventor: Erwin Hechler
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Patent number: 4544608Abstract: A method of manufacturing an aqueous O/W dispersion of fortified rosin for use in the sizing of paper by mixing the same with water and a dispersing agent by first forming a dispersion of the W/O type in the presence of the dispersing agent and then turning the first dispersion to an O/W type by sequential addition of water thereto, wherein said dispersing agent has the general formula: ##STR1## in which R is a straight- or branched-chain alkyl group having 4 to 24 C atoms, n is an integer of 6 to 20, and M.sup.+ is a cation selected from the group consisting of Na.sup.+, K.sup.+, and NH.sub.4.sup.+.Type: GrantFiled: June 12, 1984Date of Patent: October 1, 1985Assignee: Harima Chemicals, Inc.Inventors: Yasutaka Nishi, Masao Hamada, Yoshihide Ishikawa, Setsuo Inoue
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Patent number: 4540635Abstract: The colophony rosins which have been esterified with a tertiary amino alcohol are disclosed. These colophony rosins which are normally also reinforced with formaldehyde and/or an .alpha.,.beta.-unsaturated carbonyl compounds are useful in the form of an aqueous dispersion as a paper sizing agent. Disclosed are processes for the formation of such colophony rosins and paper sizing agents containing the same as well as papers so sized.Type: GrantFiled: March 15, 1984Date of Patent: September 10, 1985Assignee: Krems-Chemie, Gesellschaft mbHInventors: Helmut Ronge, Erhard Prantz, Wolfgang Schoerkhuber
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Patent number: 4525515Abstract: Storage-stable, pumpable, concentrated polymer suspensions, well adapted for use as thickening and flocculating agents, are comprised of (i) a water-soluble polymer, (ii) at least one water-soluble surfactant, and (iii) water, the amount of water being less than about 30% by weight of the total weight thereof.Type: GrantFiled: July 25, 1983Date of Patent: June 25, 1985Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Michel Peignier, Claude Renault
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Patent number: 4522686Abstract: Described are sizing compositions in the form of aqueous dispersions comprising a hydrophobic cellulose-reactive sizing agent such as a ketene dimer, fortified rosin and a water-soluble, nitrogen-containing cationic dispersing agent. The compositions are highly efficient internal or surface sizing agents for paper and maximize the advantages of each sizing component while minimizing the disadvantages.Type: GrantFiled: July 7, 1983Date of Patent: June 11, 1985Assignee: Hercules IncorporatedInventor: David H. Dumas
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Patent number: 4505754Abstract: A sulfonated dicarboxylic acid is disclosed as a cosurfactant for its efficacy in lowering foam in alum-containing aqueous dispersed rosin size, and particularly in calcium-containing dispersed rosin size systems. The sulfonated dicarboxylic acid additive also enhances alum sensitivity of the dispersed rosin size. The addition of dioctyl sodium sulfosuccinate, DSS, cosurfactant to a salt of sulfuric acid half ester surfactant-containing dispersed rosin size lowers the tendency for foaming and increases the sensitivity of the size to alum with an attendant increase in sizing efficiency.Type: GrantFiled: September 19, 1983Date of Patent: March 19, 1985Assignee: Westvaco CorporationInventor: John W. Gowan, Jr.
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Patent number: 4461646Abstract: A series of inorganic salts are disclosed for their efficacy in lowering surfactant requirements and foam in aqueous dispersed rosin size. The salts are best employed as additives to the surfactant prior to addition of surfactant to molten rosin during preparation of the aqueous dispersion. Selected chlorides, fluorides, nitrates and sulfates of aluminum, calcium, cobalt, lead, magnesium, sodium and tin are disclosed as being effective within a range of about 0.01% to 0.1% by weight of rosin at a surfactant level of about 3.5%. Aluminum nitrate at a level of 0.04 to 0.055% by weight of the rosin, at a surfactant level of 3.5%, is preferred.Type: GrantFiled: April 21, 1983Date of Patent: July 24, 1984Assignee: Westvaco CorporationInventor: John W. Gowan, Jr.
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Patent number: 4437894Abstract: Novel sizing comprising an aqueous mixture of ammonia, an ammonium salt of formic acid, and a rosin that is modified with from about 5 to 50 percent, based on the weight of the rosin, of an organic acidic compound selected from the group consisting of an .alpha.,.beta.-unsaturated organic acid, an anhydride thereof, and their mixtures. In one embodiment, the ammonia and ammonium salt are produced as the reaction product of urea and formic acid. A method of making the sizing compositions and paper which is sized with the sizing compositions are also provided.Type: GrantFiled: November 17, 1982Date of Patent: March 20, 1984Assignee: The Plasmine CorporationInventor: Ralph W. Emerson, Sr.
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Patent number: 4422879Abstract: An improved inversion process for the preparation of a paper sizing agent which is an aqueous dispersion containing a high content of free rosin in the form of fortified rosin and/or non-fortified rosin, water, and an anionic dispersing agent is disclosed. The improvement comprises using as the dispersing agent a polyethoxylated, sulfated rosin or a derivative thereof. There is also disclosed an aqueous dispersion useful as a paper sizing agent comprising from about 10 to about 60% of fortified and/or non-fortified rosin, from about 1 to about 10% of a polyethoxylated, sulfated rosin or a derivative thereof, based on the total weight of all solids in the dispersion, and a sufficient amount of water to form a dispersion.Type: GrantFiled: July 26, 1982Date of Patent: December 27, 1983Assignee: Akzona, Inc.Inventors: Guenter Poppel, Horst Schuermann, Gabriel Falkenberg
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Patent number: 4404034Abstract: This invention provides a process for preparing an aqueous dispersion of a rosin-base material by an inversion method, the process being characterized in that the dispersant is at least one of compounds represented by the formula ##STR1## wherein R is straight-chain or branched-chain alkyl or alkenyl group having 10 to 24 carbon atoms, n is an integer of 4 to 25, one of X and Y is --SO.sub.3 M and the other thereof is hydrogen atom, and M is a monovalent cation.Type: GrantFiled: September 15, 1981Date of Patent: September 13, 1983Assignee: Arakawa Kagaku Kogyo Kabushiki KaishaInventors: Kimio Kawatani, Ryoji Kaji
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Patent number: 4380475Abstract: This invention provides a process for preparing an aqueous dispersion of a rosin-base material by an inversion method, the process being characterized in that the dispersant is at least one of compounds represented by the formula ##STR1## wherein R is hydrogen atom or lower alkyl group, A is straight-chain or branched-chain alkylene group having 2 or 3 carbon atoms, n is an integer of 4 to 25, one of X and Y is --SO.sub.3 M and the other thereof is hydrogen atom, and M is a monovalent cation.The aqueous dispersion obtained by the process of the invention have excellent sizing effects, very high stabilities and greatly reduced foaming properties.Type: GrantFiled: July 29, 1981Date of Patent: April 19, 1983Assignee: Arakawa Kagaku Kogyo Kabushiki KaishaInventors: Kimio Kawatani, Shigenori Tsujimoto, Ryoji Kaji
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Patent number: 4374673Abstract: Disclosed are novel aqueous dispersions which consist essentially of finely-divided fortified rosin particles; a water-soluble or water-dispersible cationic starch dispersing agent for the finely-divided fortified rosin particles; an anionic surface-active agent; and water. The novel aqueous dispersions are used to size paper.Type: GrantFiled: December 31, 1980Date of Patent: February 22, 1983Assignee: Hercules IncorporatedInventor: Paul H. Aldrich
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Patent number: 4362568Abstract: A petroleum distillate-free or essentially petroleum distillate-free prime coat material for application to absorptive surfaces, such as untreated road or street surfaces, which is designed to penetrate, bond, and stabilize such existing surfaces and to promote adhesion between such surfaces and construction courses that follow. This type of material is also often used as a dust palliative. For this purpose, the material is applied to an untreated surface to control dust.Type: GrantFiled: October 6, 1980Date of Patent: December 7, 1982Assignee: K. E. McConnaughay, Inc.Inventor: Larry F. Ostermeyer
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Patent number: 4309338Abstract: This invention provides a process for preparing an aqueous dispersion of a rosin-base material by a so-called inversion method, the process being characterized in that the dispersant is at least one member selected from the group consisting of:(a) salt of sulfonic acid represented by the formula ##STR1## wherein R.sup.1 is a hydrocarbon residue having 4 to 18 carbon atoms, m is an integer of 1 or 2, n is an integer of 4 to 25, X is hydrogen or hydroxyl, and M is a monovalent cation, and(b) salt of sulfuric acid half ester represented by the formula ##STR2## wherein R.sup.2 is hydrogen or lower alkyl, A is straight-chain or branched-chain alkylene having 2 to 3 carbon atoms, p is an integer of 4 to 25, and Q is a monovalent cation.The aqueous dispersion obtained by the process of the invention have excellent sizing effects, very high storage, mechanical and dilution stabilities, and greatly reduced foaming properties.Type: GrantFiled: October 29, 1980Date of Patent: January 5, 1982Assignee: Arakawa Kagaku Kogyo Kabushiki KaishaInventors: Toshiharu Okumichi, Kimio Kawatani
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Patent number: 4305742Abstract: A sizing composition and process are provided for producing wound packages and particularly precision wound packages of glass fiber strand and/or roving. The sizing composition has a total solids content in the range of about 9 to about 30 weight percent and comprises a phenolic epoxy resin, the reaction product of a partial ester of a polycarboxylic acid containing one or more unesterified carboxyl groups with a compound containing more than one epoxy group; and organo silane or silanes; a non-ionic surface active agent; a protective colloid; and a cationic lubricant.Type: GrantFiled: January 5, 1981Date of Patent: December 15, 1981Assignee: PPG Industries, Inc.Inventors: Herbert W. Barch, Howard J. Hudson, Jerry C. Hedden
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Patent number: 4297399Abstract: A composition and process for improving the curing of concrete, the composition comprising a Singapore dammar resin dissolved in an organic solvent. In a preferred embodiment of this invention, the resin-solvent solution is dispersed in a water-based emulsion by the use of an appropriate emulsifying agent. A preferred organic solvent is mineral spirits, and preferably the organic solvent contains a low enough level of photochemically reactive liquids to meet air pollution requirements such as Los Angeles Rule 66.Type: GrantFiled: January 8, 1980Date of Patent: October 27, 1981Assignee: Martin Marietta CorporationInventor: John S. Perz
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Patent number: 4267099Abstract: This invention provides a process for preparing an aqueous dispersion of a rosin-base material by a so-called inversion method, the process being characterized in that the dispersant is at least one member selected from the group consisting of:(a) salt of sulfonic acid represented by the formula ##STR1## wherein R.sup.1 is a hydrocarbon residue having 4 to 18 carbon atoms, m is an integer of 1 or 2, n is an integer of 4 to 25, X is hydrogen or hydroxyl, and M is a monovalent cation, and(b) salt of sulfuric acid half ester represented by the formula ##STR2## wherein R.sup.2 is hydrogen or lower alkyl, A is straight-chain or branched-chain alkylene having 2 to 3 carbon atoms, p is an integer of 4 to 25, and Q is a monovalent cation.The aqueous dispersion obtained by the process of the invention have excellent sizing effects, very high storage, mechanical and dilution stabilities, and greatly reduced foaming properties.Type: GrantFiled: January 21, 1980Date of Patent: May 12, 1981Assignee: Arakawa Kagaku Kogyo Kabushiki KaishaInventors: Toshiharu Okumichi, Kimio Kawatani
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Patent number: 4203776Abstract: Disclosed is a process for preparing paper size from fortified rosin wherein salts of sulfosuccinates of ethylene oxide condensates are employed as dispersing agents.Type: GrantFiled: September 19, 1978Date of Patent: May 20, 1980Assignee: Hercules IncorporatedInventor: Richard W. Greiner
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Patent number: 4199369Abstract: In the inversion process for preparing paper size from fortified rosin wherein a water-soluble dispersing agent including an ethylene oxide sulphate group is used to provide a stable aqueous dispersion of fortified rosin; and an invert size produced by such a process.Type: GrantFiled: June 22, 1978Date of Patent: April 22, 1980Assignee: Hercules IncorporatedInventors: Richrd M. Hughes, Heinz Warnecke
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Patent number: 4185618Abstract: A composition and method of using same is disclosed for the permanent sterilization of female subjects without the need for expensive surgery or highly skilled personnel. The composition comprises a gel-forming carrier substance which sets-up on introduction into the fallopian tubes and holds in place a tissue fibrosing promoting material carried thereby for a period of time to cause fibrous tissue growth which closes the fallopian tubes and results in sterilization.Type: GrantFiled: June 26, 1978Date of Patent: January 29, 1980Assignee: Population Research, Inc.Inventor: Harold Corey
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Patent number: 4148665Abstract: Colloidal aqueous dispersions of rosin possess improved mechanical and heat stability when they have a small dissolved content of a water-dispersible emulsifying agent selected from the group consisting of tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfosuccinamate, disodium N-octadecylsulfosuccinate, disodium dodecylpenta(ethoxy) ethylsulfosuccinate, and disodium decylsulfosuccinate as stabilizing agent.Type: GrantFiled: September 22, 1977Date of Patent: April 10, 1979Assignee: American Cyanamid CompanyInventors: Russell J. Kulick, Sewell T. Moore
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Patent number: 4138377Abstract: A paint comprising as a film-forming component a resinous substance obtained by reacting maleinized polybutadiene containing an unsaturated group and having a low degree of polymerization with a diamine compound containing a primary and a secondary amino group. The resinous substance can be readily rendered water-soluble, and is useful as water-base paints, particularly electrodeposition paints that deposit on the cathode. In place of the maleinized polybutadiene, maleinized drying oils or semi-drying oils or maleinized petroleum resins can also be used.Type: GrantFiled: November 16, 1977Date of Patent: February 6, 1979Assignee: Nippon Oil Company, Ltd.Inventors: Yutaka Otsuki, Yoshihiko Araki, Kazuho Aoyama
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Patent number: 4131476Abstract: Salts of lithium or magnesium and an organic carboxylic acid, especially lithium acetate and/or magnesium acetate, are added to green molding sand to improve the properties of hot green molding sand at 110-160.degree. F (43.3-71.1.degree. C). Magnesium acetate is preferred, especially in green molding sands used for casting steel.Type: GrantFiled: August 5, 1977Date of Patent: December 26, 1978Assignee: Whitehead Brothers CompanyInventors: Ronald E. Melcher, Frederick W. Schaefer
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Patent number: 4113506Abstract: Stable aqueous emulsions comprising a resinic acid isocyanate, a non-ionic and/or anionic emulsifier and an optionally chlorinated hydrocarbon are used as sizing agents for paper or paper-like materials.Type: GrantFiled: December 10, 1976Date of Patent: September 12, 1978Assignee: Bayer AktiengesellschaftInventors: Gunter Sackmann, Udo-Winfried Hendricks, Hans-Ludwig Honig, Gunter Kolb, Friedhelm Muller
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Patent number: 4072536Abstract: A paint comprising as a film-forming component a resinous substance obtained by reacting maleinized polybutadiene containing an unsaturated group and having a low degree of polymerization with a dialkylaminoalkylamine. The resinous substance can be readily rendered water-soluble, and is useful as aqueous paints, particularly electrodeposition paints that deposit on the cathode. In place of the maleinized polybutadiene, maleinized drying oils or semi-drying oils or maleinized petroleum resins can also be used.Type: GrantFiled: April 14, 1976Date of Patent: February 7, 1978Assignee: Nippon Oil Company, Ltd.Inventors: Yutaka Otsuki, Yoshihiko Araki, Kazuho Aoyama
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Patent number: 4071645Abstract: The aqueous coating composition, which is particularly adaptable for use as a household floor polish or a temporary protective coating for various articles, contains a non-volatile, solid film former, such as an acrylic copolymer, dispersed in the aqueous phase or base, and a water-soluble, acid-base indicator, such as thymolphthalein, which is colored at a pH above a predetermined level and is colorless at a lower pH. Upon being applied on the surface of a substrate, a substantially colorless film is formed thereon upon the evaporation of the water and the color indicator becomes an integral part of the dried film. Upon the application of an aqueous alkaline cleaning or stripping solution having a pH above that required to effect a color change of the color indicator, (e.g., above about 11.6 when thymolphthalein is used), the film changes to a distinctive color (e.g.Type: GrantFiled: March 12, 1976Date of Patent: January 31, 1978Assignee: Acme Chemical CompanyInventor: Joe E. Kahn
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Patent number: 4071375Abstract: A process for preparing a stable aqueous dispersion of rosin-base material by dissolving in a water-immiscible organic solvent a rosin-base material composed of 0 to 95 wt. % of rosin and 100 to 5 wt. % of an adduct of rosin and .alpha.,.beta.-unsaturated carboxylic acid or anhydride thereof, dispersing the organic solvent solution in water in the presence of a dispersant and removing the organic solvent from the resulting emulsion, the process being characterized in that the dispersant in an alkali metal salt of a half alkyl sulfate.Type: GrantFiled: October 14, 1976Date of Patent: January 31, 1978Assignee: Arakawa Rinsan Kagaku Kogyo Kabushiki KaishaInventors: Shuhei Ishibe, Toshiharu Okumichi, Yasushi Ishihara, Hisayoshi Naka
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Patent number: 4070510Abstract: The aqueous base polish composition, which is particularly adaptable for use as a household floor polish, contains a non-volatile, solid film former, such as an acrylic copolymer, dispersed in the aqueous phase or base, a water-soluble, acid-base indicator, such as thymolphthalein, which is colored at a pH above a predetermined level and is colorless at a lower pH, in a sufficient amount to impart a distinctive original color to the composition and a sufficient amount of an alkaline material, such as potassium hydroxide, to raise the overall pH of the composition above that predetermined level, e.g., above about 11 or higher. Upon being applied on the surface of flooring, the colored polish composition retains its original color for a finite period of time while in the liquid state, e.g., 30 seconds to 2 minutes, and becomes colorless as the water evaporates during formation of a protective film finish. The color indicator becomes an integral part of the dried clear and colorless film.Type: GrantFiled: March 12, 1976Date of Patent: January 24, 1978Assignee: Acme Chemical CompanyInventor: Joe E. Kahn
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Patent number: 4066595Abstract: A water-soluble dye containing composition which comprises of a dye which is soluble in a water-miscible solvent and is insoluble in water alone, a water-miscible solvent and a water-soluble resin. These compositions may be prepared by first dissolving a dye in a water-miscible solvent and thereafter adding the dye solution to an aqueous solution of a resin. The resulting compositions are useful to color aqueous resin emulsions.Type: GrantFiled: June 11, 1975Date of Patent: January 3, 1978Assignee: Ciba-Geigy CorporationInventor: Hans-Henning Bunge
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Patent number: 4019921Abstract: Condensation products are formed from the unsaponifiable constituents of tall oil and alpha- beta- unsaturated mono- or poly-basic aliphatic acids or their derivatives. The condensation products can be formed into aqueous soap solutions in which form they find use as agents in the sizing of paper, particularly when used as fortifying agents for rosin acid soap sizes.Type: GrantFiled: February 11, 1975Date of Patent: April 26, 1977Inventor: Adolf Koebner
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Patent number: 3997306Abstract: A glass fiber size is provided which contains a phenolic epoxy resin, the reaction product of the partial ester of a polycarboxylic acid containing one or more unesterified carboxyl groups with a compound containing more than one epoxy group, an amino silane coupling agent, a methacryloxy alkyl trialkoxy silane, and a non-ionic surface active agent. A method of sizing glass fibers and glass fibers sized with the aforementioned composition are also provided.Type: GrantFiled: March 31, 1975Date of Patent: December 14, 1976Assignee: PPG Industries, Inc.Inventor: Jerry C. Hedden
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Patent number: 3957705Abstract: Anti-foaming agent compositions for use in aqueous synthetic resin or natural resin dispersions, containing a carboxylic acid-N-alkylamide having the formula ##EQU1## WHEREIN R.sub.1 and R.sub.2 are alkyls having from 10 to 26 carbon atoms, n and m are integers from 0 to 2, with the proviso that one of n or m is other than 0, dispersed in water or an organic liquid.Type: GrantFiled: April 24, 1974Date of Patent: May 18, 1976Assignee: Henkel & Cie G.m.b.H.Inventors: Jurgen Gartner, Rudi Heyden, Michael Eckelt, Heinz Linden, Hans Bornmann, Arnold Heins
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Patent number: RE29255Abstract: Acrylic polymer layers and colloidal silver halide photographic emulsions are coated to form layers without repellent spots from solutions containing a perfluoro compound .[.containing an intralinear carbonyl or sulfonyl group selected from the group: (1) perfluorocarbon compounds derived from perfluorocarboxylic acids having the general structure ##STR1## where C.sub.f is a fully fluorinated (perfluoro) saturated chain consisting of five or more carbon atoms which may or may not be an oxygen-interrupted carbon chain; X=OY or an amino group, where Y is H, alkali metal or an ammonium group, and (2) perfluoro compounds.]. derived from perfluorosulfonic and perfluorosulfuric acids having the general structure(C.sub.f).[..sub.x .]. (C.sub.H).sub.y (X)(Z)where C.sub.f is a fully fluorinated .Iadd.(perfluoro) saturated .Iaddend.carbon chain .[.as defined in paragraph (1).]. .Iadd.having six or more carbon atoms which may or may not be an oxygen-interrupted carbon chain.Iaddend.; C.sub.Type: GrantFiled: May 25, 1973Date of Patent: June 7, 1977Assignee: E. I. Du Pont de Nemours and CompanyInventor: Maurice James McDowell