Powdered Coating Composition Patents (Class 525/934)
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Patent number: 11920049Abstract: Powder coating compositions for low temperature cure between 100° C. and 150° C. The powder coating compositions contain: a) a carboxylic acid functional resin A which is a polyester resin A having carboxylic acid groups, b) a first glycidyl functional resin B1 which is a bisphenol A based epoxy resin having glycidyl groups, c) a second glycidyl functional resin B2 which is a phenol or cresol epoxy novolac resin having glycidyl groups, and d) at least one thermosetting curing catalyst C. Such powder coating compositions may exhibit, upon curing, an excellent combination of physical properties such as smoothness, flexibility, hardness and, above all, an outstanding durability for the MEK impregnation test.Type: GrantFiled: October 28, 2019Date of Patent: March 5, 2024Assignees: ALLNEX USA INC, ALLNEX ITALY SRLInventors: Roberto Cavalieri, Callistus Ugoh Ezeagu
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Patent number: 8907130Abstract: The invention relates to novel ?-hydroxyalkylamides, to a method for their production and to the use thereof.Type: GrantFiled: March 10, 2011Date of Patent: December 9, 2014Assignee: Evonik Degussa GmbHInventors: Werner Grenda, Emmanouil Spyrou, Thomas Weihrauch, Christoph Lammers, Holger Loesch, Klaus Behrendt
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Patent number: 8524837Abstract: The invention relates to heat-curing powder-lacquer compositions exhibiting a matte surface after curing of the coating, as well as to a simple method for production of the same.Type: GrantFiled: March 10, 2011Date of Patent: September 3, 2013Assignee: Evonik Degussa GmbHInventors: Werner Grenda, Emmanouil Spyrou, Thomas Weihrauch, Christoph Lammers, Holger Loesch, Klaus Behrendt
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Patent number: 8236865Abstract: A hydrophilic vinylidene fluoride resin composition, comprising: porous vinylidene fluoride polymer particles and a hydrophilic polymer having a weight-average molecular weight of at least 2×105 contained in the pores of the porous vinylidene fluoride polymer particles. The composition is preferably obtained by subjecting a slurry containing porous vinylidene fluoride polymer particles after suspension polymerization to an appropriate degree of heat treatment for adjusting the amount of residual polymerization initiator, then impregnating the Polymer particles with a hydrophilic monomer and polymerizing the monomer. The thus-obtained vinylidene fluoride resin composition exhibits persistent hydrophilicity and good processability.Type: GrantFiled: January 30, 2006Date of Patent: August 7, 2012Assignee: Kureha CorporationInventors: Tomoaki Kawakami, Toshio Hosokawa
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Patent number: 8138240Abstract: Composition suitable for a powder coating composition comprising at least one resin and at least one dispersant wherein the dispersant is added during the resin synthesis or while the resin leaves the reactor.Type: GrantFiled: December 8, 2005Date of Patent: March 20, 2012Assignee: DSM IP Assets B.V.Inventors: Leendert J. Molhoek, Jurjen H. M. Bolks, Jochum Beetsma
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Patent number: 8063265Abstract: A hydrogel having a floatability where from 40% to 90% of a solution and/or suspension to be thickened are thickened starting from the surface of the liquid and the rest of the solution and/or suspension to be thickened is thickened starting from the bottom of the container, a process for preparing the hydrogel and also its use for absorbing blood and/or body fluids, especially in hygiene articles, or for thickening aqueous solutions and/or suspensions, especially for thickening medical wastes.Type: GrantFiled: October 28, 2004Date of Patent: November 22, 2011Assignee: BASF AktiengesellschaftInventors: Martin Beck, Volker Frenz, Anna Kowalski, Elisabeth Selzer, Ernst Jürgen Bauer, Harald Keller, Bernhard Steinmetz
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Patent number: 8021586Abstract: A curable resin composition and powder coating compositions made therefrom including (a) an epoxy resin; (b) an amphiphilic block copolymer containing at least one epoxy resin miscible block segment and at least one epoxy resin immiscible block segment; wherein the immiscible block segment comprises at least one polyether structure provided that the polyether structure of said immiscible block segment contains at least one or more alkylene oxide monomer units having at least four carbon atoms; such that when the epoxy resin composition is cured, the toughness of the resulting cured epoxy resin composition is increased; and (c) at least one curing agent required for the manufacturing, application and proper performance of the powder coating. The amphiphilic block copolymer is preferably an all polyether block copolymer such as a PEO-PBO diblock copolymer or a PEO-PBO-PEO triblock copolymer.Type: GrantFiled: November 2, 2005Date of Patent: September 20, 2011Assignee: Dow Global Technologies LLCInventors: Kandathil E. Verghese, Marcos P. Franca
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Patent number: 7960475Abstract: A powder coating composition of the present invention includes, as essential components, an epoxy group-containing vinyl copolymer (A) with a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) that contains organosiloxane side chains and has a glass transition temperature of 0° C. or lower, and a polyvalent carboxylic acid (C), and is able to form a coating film with excellent external appearance and scratch resistance.Type: GrantFiled: March 9, 2005Date of Patent: June 14, 2011Assignee: DIC CorporationInventors: Naoyuki Seike, Koichi Yamaguchi, Yutaka Furuya, Tetsuro Agawa
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Patent number: 7960482Abstract: A powder coating composition obtainable by homogeneous mixing of at least two separately produced powder coating compositions as powder coating bases to yield coating compositions having good storage stability and coatings with controlled low gloss levels as well as high exterior durability and stable flexibility.Type: GrantFiled: July 17, 2009Date of Patent: June 14, 2011Inventors: Roger Fugier, Vincent Berger
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Patent number: 7951427Abstract: The invention relates to thermosetting powder compositions which give coatings proving remarkable weatherability, excellent mechanical properties and an outstanding flow containing a binder which comprises a mixture of amorphous polyesters (A) containing from 50 to 100 mol % of isophthalic acid and from 70 to 100 mol % of neopentyl glycol, and (B) which comprises from 75 to 100 mol % of at least one straight-chain saturated di-carboxylic aliphatic acid having from 4 to 14 carbon atoms and from 75 to 100 mol % of at least one branched chain aliphatic diol.Type: GrantFiled: May 15, 2006Date of Patent: May 31, 2011Assignee: Cytec Surface Specialties, S.A.Inventors: Luc Moens, Nele Knoops, Daniel Maetens
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Patent number: 7880018Abstract: A novel epoxy compound represented by the following general formula (I), and a production process thereof, is provided: Y—(CH2)3—Si(OR1)nR23-n??(I) (wherein, Y is represented by any of the following formulas: wherein, R1 and R2 represent alkyl groups having 1 to 5 carbon atoms, n represents an integer of 1 to 3, R3 and R4 represent hydrogen atoms, alkyl groups having 1 to 6 carbon atoms or trialkylsilyl groups having 1 to 4 carbon atoms, R5 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a trialkylsilyl group having 1 to 4 carbon atoms, R6 to R12 represent hydrogen atoms, alkyl groups having 1 to 6 carbon atoms or trialkylsilyl groups having 1 to 4 carbon atoms, and R13 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a trialkylsilyl group having 1 to 4 carbon atoms or an aryl group).Type: GrantFiled: August 13, 2007Date of Patent: February 1, 2011Assignee: Showa Denko K.K.Inventors: Nobutoshi Sasaki, Toshio Fujita, Hiroshi Uchida
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Patent number: 7514478Abstract: Powder coating binders having a glass temperature of ?35° C. containing at least one polymer and one or more radiation-curing reactive thinners, a process for the production of these powder coating binders and their use as a component of powder coatings.Type: GrantFiled: November 22, 2004Date of Patent: April 7, 2009Assignee: Bayer MaterialScience AGInventors: Thomas Fäcke, Jan Weikard, Peter Thometzek
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Patent number: 7396893Abstract: The present invention pertains to a siliconized polyester resin that has a sufficiently high Tg that the siliconized polyester is a solid at room temperature. The silicone polyester preferably has a Tg of 30° C. or greater. The silicone polyester can be produced as a particulate and remain stable at room temperature. The particulate silicone polyester is suitable for use in coating compositions, including powder coating compositions. The coating can be clear or pigmented, and thus optionally can include pigment. The coating composition also includes a crosslinker. The coating composition can be ground into a powder. The powder is stable at room temperature. The powder is then capable of being coated on a suitable substrate and then baked to form a coated metal object.Type: GrantFiled: September 25, 2006Date of Patent: July 8, 2008Assignee: Wacker Chemical CorporationInventors: James D. Greene, Mohammed Khalid Yousuf
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Patent number: 7381764Abstract: The present invention relates to novel radiation-curing powder coating binders containing maleic and/or fumaric acid esters and one or more amorphous or partially crystalline resins containing at least one group that reacts with ethylenically unsaturated compounds under the action of actinic radiation to form a polymer. The binders have a glass transition temperature ranging from 30 to 90° C. The binders can be used as a constituent in coating compositions.Type: GrantFiled: October 6, 2004Date of Patent: June 3, 2008Assignee: Bayer MaterialScience AGInventors: Thomas Fäcke, Jan Weikard, Peter Thometzek
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Patent number: 7230051Abstract: The invention relates to the use of block copolymers as leveling agents for surface coatings, having a weight-average molecular weight of from 1000 to 100000. The leveling agent is a linear or branched block copolymer composed of a polysiloxane block and one or more blocks prepared from ethylenically unsaturated monomers by controlled free-radical addition polymerization. The invention also relates to coating compositions which comprise the leveling agent.Type: GrantFiled: June 19, 2003Date of Patent: June 12, 2007Assignee: BYK-Chemie GmbHInventors: Bernd Gobelt, Alfred Bubat, Albert Frank, Karlheinz Haubennestel
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Patent number: 7148295Abstract: The invention relates to the use of special mixtures of at least two polycarboxylic acids as crosslinker components for thermally curing powder-lacquer binding agents having groups that are capable of reacting with carboxyl groups. The mixtures include at least two polycarboxylic acids each melting above 95° C. and having up to 20 carbon atoms and consist of at least 5 wt. %, of the polycarboxylic acid with the lowest melting point and at least 10 wt. %, of the polycarboxylic acid with the highest melting point of all polycarboxylic acids present in the mixture to at least 5 wt. %. Additionally, the polycarboxylic acid mixture is a solid below 40° C. and a liquid above 160° C.Type: GrantFiled: June 21, 2004Date of Patent: December 12, 2006Assignee: Bayer Materialscience AGInventors: Hans-Josef Laas, Christoph Gürtler, Reinhard Halpaap, Michael Grahl, Peter Thometzek, James Rawlins
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Patent number: 7141618Abstract: Powder coating compositions having improved mar and scratch resistance are disclosed. The coatings generally comprise one or more particles that have been modified to render the particles more surface active. The improved resistance is achieved without affecting the appearance or mechanical performance of the coatings. Methods for using the coatings, and the substrates coated therewith, are also disclosed.Type: GrantFiled: June 3, 2002Date of Patent: November 28, 2006Assignee: PPG Industries Ohio, Inc.Inventors: John R. Schneider, Daniela White, Anthony M. Chasser, James B. O'Dwyer, Thomas R. Hockswender
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Patent number: 7129310Abstract: The present invention pertains to a siliconized polyester resin that has a sufficiently high Tg that the siliconized polyester is a solid at room temperature. The silicone polyester preferably has a Tg of 30° C. or greater. The silicone polyester can be produced as a particulate and remain stable at room temperature. The particulate silicone polyester is suitable for use in coating compositions, including powder coating compositions. The coating can be clear or pigmented, and thus optionally can include pigment. The coating composition also includes a crosslinker. The coating composition can be ground into a powder. The powder is stable at room temperature. The powder is then capable of being coated on a suitable substrate and then baked to form a coated metal object.Type: GrantFiled: December 23, 2003Date of Patent: October 31, 2006Assignee: Wacker Chemical CorporationInventors: James A. Greene, Mohammed Khalid Yousuf
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Patent number: 7060357Abstract: A coating composition contains solid particulates of a mixture of an aminoplast crosslinking agent, a solid polymer having functionality reactive with the aminoplast crosslinking agent, and a crystalline, carbamate-functional additive. The crystalline, carbamate-functional additive has a melting point of at least about 30° C. and is up to about 15% by weight of the powder coating composition.Type: GrantFiled: October 4, 2002Date of Patent: June 13, 2006Assignee: BASF CorporationInventors: Walter H. Ohrbom, David J. Law, Robert D. Weise, James A. Laugal
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Patent number: 7041737Abstract: The present invention provides a low temperature curing coating powder composition comprising a mixture of a high gloss film-forming system and a low gloss film-forming system. Preferably, the high gloss film-forming system comprises a GMA (glycidyl methacrylate) resin, a curing agent, and a catalyst and forms a coating having a gloss greater than 80% measured at 60°. Preferably the low gloss film-forming system comprises a carboxyl terminated polyester, acrylic resin and a catalyst and forms a coating having a gloss less than 50% measured at 60°. The composition of the present invention provides coatings having a control gloss, which can range from a low to a high gloss and is useful for coating heat-sensitive substrates.Type: GrantFiled: November 13, 2002Date of Patent: May 9, 2006Assignee: Rohm and Haas CompanyInventors: Edward G. Nicholl, Andrew T. Daly, Carryll A. Seelig
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Patent number: 7034075Abstract: The invention is directed to a low gloss powder coating composition comprising a first component (a) and a second component (b). The first component (a) comprises a mixture of (i) at least one glycidyl group-containing acrylic resin having epoxide equivalent weight of from about 250 to about 1500 and glass transition temperature of from about 30° C. to about 80° C.; and (ii) a curing agent. The second component (b) comprises at least one carboxyl-group containing material having acid number of from about 10 to about 300 and is not substantially compatible with the first component (a). The two components are dry-blended to obtain the powder coating composition.Type: GrantFiled: November 28, 2000Date of Patent: April 25, 2006Assignee: H. B. Fuller Licensing & Financing Inc.Inventors: Charles J. Torborg, Jeffrey G. Schmierer
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Patent number: 7026393Abstract: Polyurethane powder coating materials comprising polyureas, polyesters, and crosslinkers, which have less than 15 mol % succinic acid as the polycarboxylic acid component. Matt coatings and coated materials comprising or produced using such polyurethane powder coating materials.Type: GrantFiled: July 18, 2003Date of Patent: April 11, 2006Assignee: Degussa AGInventors: Andreas Wenning, Jörn Volker Weiss
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Patent number: 6946202Abstract: A combination of powder coatings usable in a powder coating method for forming a coating film having visually homogeneous hue by mixing two or more powder coatings of which each color is different. In the combination of powder coatings, each of differences in triboelectric charges of two or more powder coatings is 5.0 ?C/g or less. The coating method usable herein includes the step of applying onto a substrate to be coated two or more powder coatings of which each color is different, in which the triboelectric charges are controlled in the above given ranges.Type: GrantFiled: March 12, 1997Date of Patent: September 20, 2005Assignee: Nippon Paint Co., Ltd.Inventors: Masayuki Maruta, Yukiya Sato, Katsutoshi Aoki, Yasunori Inagaki, Kuniyasu Kawabe, Hisakazu Tajima, Shinji Moriyama
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Patent number: 6936663Abstract: Disclosed is a powder coating composition containing a powder coating resin and a polyhedral oligomeric silsesquioxane (“POSS”) compound.Type: GrantFiled: July 6, 2004Date of Patent: August 30, 2005Assignee: Conano CorporationInventor: Robert Modisette
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Patent number: 6927253Abstract: Powder clearcoat dispersions (powder slurry clearcoats) preparable by adding a secondary (meth)acrylate copolymer dispersion in liquid and/or powder form to a powder slurry during and/or after its preparation; and the use thereof for producing clearcoat finishes, especially as part of multicoat color and/or effect finishes.Type: GrantFiled: June 1, 2001Date of Patent: August 9, 2005Assignee: BASF Coatings AGInventors: Walter Lassmann, Heinz-Peter Rink, Horst Hintze-Brüning, Klaus-Dieter Stegmann
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Patent number: 6890999Abstract: A mixture of a self-curing epoxy resin having an equivalent weight of from about 100 to about 700, a melt viscosity of from about 200 to about 2000 centipoise at 150° C. and a low temperature curing agent capable of maintaining its own domain during extrusion which is extruded as one component at a temperature below 220° F. and the extrudate is cooled and pulverized to form a low temperature curable coating powder. The powder cures at a temperature of from about 225 to about 300° F. and produces a coating having an exceptionally smooth surface with either a low or high gloss. The powder is particularly useful for coating heat sensitive substrates such as plastics, paper, cardboard and wood.Type: GrantFiled: October 24, 2002Date of Patent: May 10, 2005Assignee: Rohm and Haas CompanyInventors: Jeno Muthiah, Jeremiah J. Teti, Jacquelyn M. Schlessman, William G. Ruth, Carryll A. Seelig
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Patent number: 6849678Abstract: The current process for producing powder coatings can be replaced with a process utilizing supercritical fluids including polymer polymerization, compatibilized blending of powder coating ingredients, and particle size control and classification of the powder coating. Traditionally, powder coating resins are polymerized in solvent based system. Next, the resin is blended with additives in a twin screw extruder at high temperatures. The material is then ground and separated by particle size to form the finished powder coating. This invention replaces the previous process by performing all operations in a supercritical fluid, preferably, carbon dioxide. Polymerization is conducted at any pressure above critical pressure and temperature above critical temperature up to 190°C. Solubility of the polymer in the supercritical fluid allows for control and narrow distribution of the molecular weight and a polydispersity of about 2 or less.Type: GrantFiled: January 8, 2002Date of Patent: February 1, 2005Assignee: The University of AkronInventors: Sunggyu Lee, H. Bryan Lanterman, Paul Pettit, Jr., Kathy L. Fullerton
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Patent number: 6844072Abstract: The present invention relates to powdered thermosetting compositions including a binder which comprises a carboxyl group containing amorphous isophthalic acid containing polyester, a carboxyl group containing semi-crystalline polyester, at least 10 parts by weight, based on the total weight of the binder, of a specific glycidyl group containing acrylic copolymer and a curing agent having functional groups reactive with the polyesters' carboxyl groups. The powdered thermosetting compositions are useful for the preparation of powdered paints and varnishes which give low gloss coatings having an outstanding flow, a remarkable weatherability and excellent mechanical properties.Type: GrantFiled: December 17, 2001Date of Patent: January 18, 2005Assignee: Surface Specialties, S.A.Inventors: Luc Moens, Nele Knoops, Daniel Maetens
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Patent number: 6844392Abstract: An abradable dry powder coating (22) composition for coating onto a surface (12) for subsequent curing to form into an abradable coating, including a powder (16) formed of uncured thermoset resin with at least 15 volume percent filler, wherein the filler does not substantially melt below the cure temperature of the resin. Method for making the coating composition includes melt-mixing the thermoset resin with at least 15 volume percent of filler, cooling the resulting mass composite, and then breaking the cooled mass composite into powder particles (16). Method of coating an article with an abradable coating includes applying the dry composite powder with the filler therein onto a substrate and curing the dry powder composition, preferably by electrostatic coating. An article is also disclosed which is coated with the abradable coating.Type: GrantFiled: August 29, 2001Date of Patent: January 18, 2005Inventor: Andrew W. Suman
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Publication number: 20040224153Abstract: A composition or particle mixture (20) for equalizing radial and lateral forces at the tire/road footprint of a pneumatic tire (11) due to tire/wheel assembly imbalance, non-uniformity of the tire, temporary disturbances in the road surface, or other vibrational effects of the unsprung mass of a vehicle whereby the particle mixture (20) is inserted into the interior of the tire (11). The composition is a dry solid particle mixture (20) wherein the particles are freely flowable and non-tacky at elevated tire temperatures, the particle mixture (20) is essentially devoid of liquid material, and the particle mixture (20) comprises two or more sets of particles wherein each set consists essentially of particles of a predetermined size or size range. The particle mixture (20) exhibits a multimodal particle size distribution.Type: ApplicationFiled: April 12, 2002Publication date: November 11, 2004Inventor: Robert D. Fogal, Sr.
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Patent number: 6812267Abstract: A process for making pigmented PVDF-based powder coatings by coagulation and powder based coatings made by the process. The process involves blending a PVDF latex and a water reducible acrylic polymer and pigment dispersion, adding coagulant to precipitate solid PVDF and pigment associated by ionic interaction with acrylic polymer binder, separating solids and drying the precipitate. Also, methods for coating substrates with the powder coating and coated substrates.Type: GrantFiled: May 21, 2003Date of Patent: November 2, 2004Assignee: Solvay Solexis, Inc.Inventors: Shiow-Ching Lin, Michelle Kelly, Bradley Kent
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Patent number: 6812316Abstract: The curable coating compositions of the invention comprise a particulate component having at least one binder component (a) which is a solid at 75° F./24° C., and an additive component (b). The curable coating compositions further comprise a crosslinking component (c) reactive with the at least one binder component (a). Additive component (b) has from 12 to 72 carbon atoms, is substantially free of any heteroatoms, is not a crystalline solid at 75° F./24° C. and comprises a mixture of two or more structures selected from the group consisting of aliphatic structures for additive component (b), aromatic-containing structures for additive component (b), cycloaliphatic-containing structures for additive component (b), and mixtures thereof, wherein at least one of the two or more structures is either a cycloaliphatic-containing structure or an aromatic-containing structure.Type: GrantFiled: September 30, 2002Date of Patent: November 2, 2004Assignee: BASF CorporationInventors: Walter H. Ohrbom, David J. Law, Robert D. Weise
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Patent number: 6797749Abstract: The invention provides a powder coating composition in which powder particles are an agglomerate of individual particulate components fused or bonded together into composite particles. Maximizing the amount of larger-sized uncolored component(s) gives cost advantages, and the invention allows a rapid and flexible manufacture of a range of colored powder coating compositions.Type: GrantFiled: December 11, 2001Date of Patent: September 28, 2004Assignee: International Coatings LimitedInventor: Andrew George Cordiner
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Patent number: 6797387Abstract: A crosslinking agent is provided, prepared by reacting (A) an aminoplast resin; (B) a reactive urethane group-containing adduct of a polyfunctional polymer and monoisocyanate, and (C) at least one other compound having active hydrogen groups reactive with aminoplast resin (A). Compound (C) is selected from: (i) compounds having the structure (I): wherein X is aromatic; R1, R2, and R3 each independently represents H, (cyclo)alkyl having from 1 to 12 carbon atoms, aryl, alkaryl, aralkyl, or an active hydrogen-containing group, (ii) compounds having the structure (II) or (III): where R′ and R″ each independently represents an aromatic group or an alkyl group having 1 to 12 carbon atoms; and (iii) compounds different from (i) and (ii), having a melting point of at least 80° C. Further provided are methods for preparing the crosslinking agent, curable compositions containing the crosslinking agent, and coated substrates.Type: GrantFiled: July 31, 2001Date of Patent: September 28, 2004Assignee: PPG Industries Ohio Inc.Inventors: Ronald R. Ambrose, Anthony M. Chasser, Shengkui Hu, Jackie L. Smith
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Patent number: 6797222Abstract: A slush molding process in which the moldable thermoplastic composition powder dosed to the mold is prepared by blending ethylene carboxylic acid copolymers or ionomers with ethylene/glycidyl acrylate or methacrylate copolymer and cross-linking promoter at a temperature and for a time that does not cause significant cross-linking prior to dosing to mold, which is held for sufficient time and temperature to cause cross-linking in-situ, and optionally, other additives including release agents.Type: GrantFiled: October 31, 2002Date of Patent: September 28, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Karlheinz Hausmann, George K. Kodokian, George W. Prejean
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Patent number: 6784258Abstract: A crosslinking agent is provided, prepared by reacting (A) an aminoplast resin; (B) a reactive urethane group-containing adduct and (C) at least one other compound having active hydrogen groups reactive with aminoplast resin (A). Compound (C) is selected from: (i) compounds having the structure (I): wherein X is aromatic; R1, R2, and R3 each independently represents H, (cyclo)alkyl having from 1 to 12 carbon atoms, aryl, alkaryl, aralkyl, or an active hydrogen-containing group, (ii) compounds having the structure (II) or (III): where R′ and R″ each independently represents an aromatic group or an alkyl group having 1 to 12 carbon atoms; and (iii) compounds different from (i) and (ii), having a melting point of at least 80° C. Further provided are methods for preparing the crosslinking agent curable compositions containing the crosslinking agent, and coated substrates.Type: GrantFiled: July 31, 2001Date of Patent: August 31, 2004Assignee: PPG Industries Ohio, Inc.Inventors: Ronald R. Ambrose, Anthony M. Chasser, Shengkui Hu, Jackie L. Smith
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Patent number: 6762248Abstract: An epoxy group-containing acrylic resin for a powder coating is prepared by suspension polymerization at a temperature of at least 80° C. and a pressure of at least 2 kg/cm2 with a vinyl monomer mixture comprising from 10-60% by weight of epoxy group-containing vinyl monomers, from 10-60% by weight of alkyl (meth)acrylate(s), and other vinyl monomer(s). The epoxy group-containing acrylic resin particles possess the following characteristics: i) a weight average molecular weight of from 3000-20,000; ii) an epoxy equivalent of from 350-1200 g/eq; iii) 1000 ppm or less of volatile components; iv) a mean particle diameter of from 80-800 &mgr;m; v) at least 95% by weight of the particles having a long diameter R:short diameter r ratio within the parameters 1<R/r<1.2; and vi) 5% by weight or less of the particles having a long diameter R of less than 62 &mgr;m and 5% by weight or less of particles having a short diameter r of more than 1000 &mgr;m.Type: GrantFiled: November 22, 2002Date of Patent: July 13, 2004Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Yoko Harada, Motoshi Inagaki, Koji Shimizu, Noriyuki Tajiri
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Patent number: 6759470Abstract: There is provided a resin powder for molding which comprises 35 to 98% by weight of a polytetrafluoroethylene powder having an average particle size of not more than 120 &mgr;m, 35 to 2% by weight of a heat resistant aromatic polyoxybenzoyl ester resin powder subjected to water repelling treatment and 30 to 0% by weight of an inorganic filler, has an apparent density of not less than 0.6 g/cm3 and an average particle size of not more than 800 &mgr;m, and provides a molded article having an elongation at break of not less than 20%. The resin powder for molding is free from separation of a filler, has excellent flowability and apparent density which are important characteristics in handling the powder, and can provide a PTFE molded article having a high elongation which has not been obtained.Type: GrantFiled: April 19, 2002Date of Patent: July 6, 2004Assignee: Daikin Industries, Ltd.Inventors: Masamichi Sukegawa, Michio Asano
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Patent number: 6756072Abstract: Multicomponent coating materials, adhesives and sealing compounds comprising a (meth)acrylate (A) containing, based on (A), up to 90% by weight of hydroxyl-containing monomers in copolymerized form, of which (a1) from 20-90% by weight, based on (A), are 4-hydroxybutyl (meth)acrylate and/or 2-alkylpropane-1,3-diol mono(meth)acrylate, and (a2) from 0-40% by weight based on (A), are other hydroxyl-containing monomers; and (B) an adduct preparable from (b1) a diisocyanate, and (b2) a compound of the general formula I having an isocyanate-reactive group: wherein R1 and R2 are hydrogen or alkyl radicals, X and Y are oxygen, sulfur or >N—R6 where R6 is alkyl radical or aryl radical, R3 is alkylene radical and R4 and R5 are hydrogen, isocyanate-reactive groups or radicals R6; where R4, R5 or R6 contains an isocyanate-reactive group or R4 or R5 is an isocyanate-reactive functional group, and where R4, R5 or R6, where present, contain no isocyanate-reactive groups and the molar ratio of isocyType: GrantFiled: October 4, 2002Date of Patent: June 29, 2004Assignee: BASF Coatings AGInventors: Hubert Baumgart, Heinz-Peter Rink, Simone Jurczik, Edeltraud Hagemeister
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Patent number: 6720079Abstract: The invention concerns a polyester bearing tertiary carboxyl groups, characterised in that it consists of: (a) 8.1 to 35 moles of an aliphatic or cycloaliphatic of a polyol; (b) 9.1 to 36 moles of an aliphatic, cycloaliphatic or aromatic polycarboxylic acid; (c) 1.6 to 2.8 moles of an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group. Said polyester is prepared in several steps, the first steps consisting in the preparation of a polyester by condensation between (a) an aliphatic or cycloaliphatic polyol, and (b) an aliphatic, cycloaliphatic or aromatic polycarboxylic acid, the final step consisting in condensing said polyester with (c) an aliphatic, cycloaliphatic or aromatic compound comprising a tertiary carboxyl group and either a primary or secondary carboxyl group, or a primary or secondary hydroxyl group.Type: GrantFiled: August 27, 2002Date of Patent: April 13, 2004Assignee: UCB, S.A.Inventors: Luc Moens, Kris Buysens, Daniel Maetens
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Patent number: 6713182Abstract: Provided is a crosslinking agent which is the ungelled reaction product of a polyester polyol and an aminotriazine compound having one or less non-alkylated NH bond per triazine ring. The polyester polyol is the reaction product of a cycloaliphatic polyol and a cyclic polycarboxylic acid or anhydride. The crosslinking agent is essentially free of hydroxyl functionality and has a glass transition temperature of at least 10° C. Further provided is a powder coating composition including a solid particulate film-forming mixture of a polymer containing reactive functional groups and having a Tg of at least 30° C., and the crosslinking agent. Additionally provided is a multi-layer composite coating composition having a basecoat layer deposited from a basecoat film-forming composition and a topcoat over the basecoat deposited from the previously described powder coating composition. Coated substrates are also provided.Type: GrantFiled: July 25, 2002Date of Patent: March 30, 2004Assignee: PPG Industries Ohio, Inc.Inventors: Ronald R. Ambrose, Anthony M. Chasser, Shengkui Hu, Jackie L. Smith
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Patent number: 6710136Abstract: A matt polyurethane powder coating material comprises: A) 3 to 25% by weight of a polyurea; B) 35 to 75% by weight of at least one polyester synthesized from polyols and 15-100 mol. % of succinic acid or its anhydride, having an OH number of 20-250 mg KOH/g; C) 7 to 25% by weight of at least one curing agent of a blocked polyisocyanate, isocyanurate, uretdione or a combination thereof having a functionality of at least 2; and D) 1 to 50% by weight of auxiliaries and additives; wherein from 0.6 to 1.2 NCO groups are available per OH group of the resin.Type: GrantFiled: August 28, 2001Date of Patent: March 23, 2004Assignee: Degussa AGInventors: Werner Grenda, Joern Volker Weiss
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Patent number: 6680082Abstract: The present invention relates to neutralized copolymer resins having at least two different metals with one of the metals being zinc. These mixed metal resins are transformed into particulate or powder form for application to metal objects. The powder composition has a good balance of properties including all the advantages associated with neutralized ethylene acid copolymers while also having good powder coating behavior for coatings applied to metal objects. The invention also relates to coated metal objects containing the powder composition and metal.Type: GrantFiled: October 3, 2002Date of Patent: January 20, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Richard Tien-Hua Chou, Mark Bernard Kelly
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Patent number: 6660828Abstract: The polymer of the present invention is derived from cyclic ether monomers, dioxane, dioxalane or trioxane and contains both pendant Rf fluoro groups as well as polar groups. These polymers have good wetting, or flow, or leveling properties. They can be reacted with other monomers, such as in the preparation of polyesters, and can be used in waxes, polishes and coatings.Type: GrantFiled: May 14, 2001Date of Patent: December 9, 2003Assignee: Omnova Solutions Inc.Inventors: Richard R. Thomas, Robert E. Medsker, Charles M. Kausch, Daniel D. Woodland, Gary L. Jialanella, Raymond J. Weinert, Jane E. Leising, James E. Robbins, Brian T. Cartwright
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Patent number: 6624229Abstract: The present invention relates to a powder coating material which contains preferably from 0.05 to 5% by weight, preferably from 0.5 to 2% by weight, of at least one polyethylene wax distributed homogeneously within the powder coating material.Type: GrantFiled: April 26, 2001Date of Patent: September 23, 2003Assignee: BASF Coatings AGInventors: Helmut Riestenpatt, Rolf Boysen, Birgit Perdun
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Publication number: 20030170455Abstract: To provide a powder coating composition being capable of forming a coating film which has good pigment dispersibility, is excellent in weather resistance, film forming ability, appearance and stain-proofing property and, when used for PCM, is difficult to cause cracks because of its particularly excellent bending resistance at the time of bending of a metal plate. The powder coating composition comprises a powder which contains 100 parts by weight of a vinylidene fluoride copolymer having a melting point of not higher than 150° C., a crystallinity of not higher than 35% and a weight average molecular weight (Mw) of 1×104 to 5×105 and 10 to 400 parts by weight of a methyl methacrylate copolymer having a glass transition temperature of not higher than 110° C. and a weight average molecular weight of 1×104 to 5×105; an average particle size of particles constituting the powder being from 1 to 100 &mgr;m and an apparent density of the powder being from 0.2 to 1 g/ml.Type: ApplicationFiled: February 24, 2003Publication date: September 11, 2003Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Nobuhiko Tsuda, Ryuzi Iwakiri
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Patent number: 6616979Abstract: Provided are low temperature curing thermosetting epoxy powder coating compositions comprising at least one non-crystalline epoxy resin, at least one crystalline epoxy resin, a curing agent, and a cure catalyst. Coatings made from such powder compositions exhibit a substantial reduction in bubble entrapment, enough to prevent a visible haze from forming in the coating, when cured at low temperatures demanded by brass substrates.Type: GrantFiled: August 13, 2001Date of Patent: September 9, 2003Assignee: Rohm and Haas CompanyInventors: William G. Ruth, Stacy L. Greth, Carryll A. Seelig, Dean A. Schreffler
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Patent number: 6613840Abstract: A resin composition for a powder coating, which comprises a non-crystalline polyester resin (A) having a carboxyl group, a crystalline polyester polyurethane resin (B) and a curing agent (C) made of a compound having a functional group reactable with the carboxyl group as an essential component, yields a powder coating which is highly suitable for practical use, the powder coating having superior storage stability (blocking resistance) and forming a coating film having superior smoothness under low temperature curing conditions.Type: GrantFiled: December 13, 2001Date of Patent: September 2, 2003Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Hiroyuki Itou, Tetsuro Agawa
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Patent number: 6608128Abstract: Polyvinyl alcohol compositions in the form of an aqueous solution are disclosed, where the aqueous polyvinyl alcohol compositions include: (i) polyvinyl alcohol; (ii) at least one polyaldehyde having at least 3 carbon atoms and being masked completely as a water-soluble hydrogen sulfite adduct; and (iii) at least one compound which is acidic in water. The aqueous polyvinyl alcohol compositions are suitable as adhesives and for use in cast films.Type: GrantFiled: April 13, 2000Date of Patent: August 19, 2003Assignee: Kuraray Specialities Europe GmbHInventors: Martin Jakob, Richard Gutte
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Patent number: 6599992Abstract: The present invention provides a powder coating composition. The powder coating composition includes a polyester resin having both hydroxyl and carboxyl groups, a curing agent for the carboxyl groups of the polyester resin, and an uretdione hardener which reacts with the hydroxyl groups.Type: GrantFiled: May 16, 2000Date of Patent: July 29, 2003Assignee: Reichhold, Inc.Inventors: Christoph Alfred Brunmair, Rudolf Leopold Kaiser