Patents by Inventor Volker Rekowski
Volker Rekowski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20090053539Abstract: A process of powder coating aluminum substrate surfaces comprising the steps a) pre-treating the aluminum substrate surface by a color-less chemical treatment process, b) applying a clear powder coating composition based on at least one (meth)acrylic resin providing a low gloss of the cured coating in the range of 1 to 20 gloss units at 60°, and curing the coating composition. The process makes it possible to provide the desired special effect of the coated surface which meets the effect resulting by the use of an anodizing process. The one-layer clear coating on the substrate provides in addition a high appearance and smoothness of the cured coating, a strong adhesion to the unprimed aluminum substrate surface as well as excellent hardness, corrosion-resistance, weather resistance and light fastness of the cured coating.Type: ApplicationFiled: August 22, 2008Publication date: February 26, 2009Inventors: Carlos Rodriguez-Santamarta, Volker Rekowski, Emesto Marelli
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Publication number: 20090018263Abstract: An anti-graffiti powder coating composition comprising (A) 30 to 80 wt % of a mixture of at least one polyester resin A having a hydroxyl number in the range of 30 to 60 mg KOH/g, a weight average molar mass Mn in a range of 3100 to 5000 and a glass transition temperature Tg of 40 to 60° C. and at least one polyester resin B having a hydroxyl number in the range of 250 to 350 mg KOH/g, a weight average molar mass Mn in a range of 2000 to 3000, (B) 10 to 40 wt % of at least one hardeners diisocyanates, polyisocyanates or urethdiones, and (C) 0.01 to 40 wt % of at least one coating additive, pigment and/or filler. The powder coating composition provide very good anti-graffiti performance over long time period and good coating properties.Type: ApplicationFiled: December 18, 2007Publication date: January 15, 2009Inventors: Ernesto Marelli, Carlos Rodriguez-Santamarta, Volker Rekowski
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Publication number: 20070251420Abstract: A powder coating composition comprising an intimate mixture of at least one thermoplastic and/or thermosetting resin binder and optionally, at least one crosslinking agent and constituents conventional in powder coating compositions, such as, pigments, fillers and additives, comprising aluminum particles having a D50 in a range of 8 to 20 ?m whereby the aluminum particles are treated with compounds selected from the group consisting of silica, (meth)acrylic polymers, polyesters and wax; the powder coating composition provides coatings with a value of thermal emissivity in a range of 0.4 to 0.55 with total solar reflectance values in a range of 60 to 70% in the infrared (IR) and/or near IR (NIR) wavelength region of 0.3 to 2.5 ?m, to minimize the heat transportation through a substrate coated by the powder coating composition, e.g., from a warm building to a colder environment.Type: ApplicationFiled: January 22, 2007Publication date: November 1, 2007Inventors: Helene Bolm, Volker Rekowski, Jostein Mardalen, Merete Hallenstvet, Thomas Jeffers
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Patent number: 7112628Abstract: Aqueous electrophoretic lacquer capable of being deposited cataphoretically, containing A) an aqueous dispersion of cationically modified polyurethane (meth)acrylates (a1) with terminal, ethylenically unsaturated (meth)acrylic double bonds, and reactive thinner (a2) with at least two ethylenically unsaturated (meth)acrylic double bonds, the (meth)acrylic double bonds of the mixture of (a1) and (a2) corresponding to a bromine number of 20 to 150 g bromine/100 g solids, and B) photoinitiators and optionally free-radical initiators capable of thermal activation, the terminal, ethylenically unsaturated (meth)acrylic double bonds of the polyurethane (meth)acrylates being bonded with the anionically modified polyurethane prepolymer via urethane, urea, amide or ester groups, and optionally conventional auxiliary substances and additives, pigments and/or fillers.Type: GrantFiled: December 1, 2000Date of Patent: September 26, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Andreas Fieberg, Volker Rekowski, Dietrich Saatweber, Hans-Ulrich Simmrock, Bettina Vogt-Birnbrich
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Patent number: 6750270Abstract: Nanoparticle-modified binders obtainable by reacting binders produced in the presence of nanoparticles provided with a reactive functionality, said binders having a reactive functionality complementary to the reactive functionality of the nanoparticles, with the nanoparticles, production thereof, coating compositions containing them and use thereof.Type: GrantFiled: January 15, 2002Date of Patent: June 15, 2004Assignee: E. I. du Ponte de Nemours and CompanyInventors: Peter Klostermann, Volker Rekowski, Dietrich Saatweber
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Publication number: 20030121786Abstract: Aqueous electrophoretic lacquer capable of being deposited cataphoretically, containingType: ApplicationFiled: November 4, 2002Publication date: July 3, 2003Inventors: Andreas Fieberg, Volker Rekowski, Dietrich Saatweber, Hans-Ulrich Simmrock, Bettina Vogt-Birnbrich
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Patent number: 6582770Abstract: A process for the preparation of a coating layer comprising the steps: (a) applying a coating layer to a substrate from a coating agent of which the resin solids comprise a binder system curable by free-radical polymerization of olefinic double bonds, and containing 0.1 to 4 wt-%, based on resin solids, of a morpholin-2-one derivative sterically hindered by 3,3,5,5-polysubstitution as a light stabilizer; and (b) thermal curing of the applied coating layer.Type: GrantFiled: July 31, 2001Date of Patent: June 24, 2003Assignee: E.I. du Pont de Nemours and CompanyInventors: Volker Rekowski, Oliver Reis, Christine Kurz
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Patent number: 6541078Abstract: The invention is directed to a process for coating substrates by applying at least one coating composition to an optionally precoated substrate and then curing the coating layer(s) thus obtained, wherein at least one of the coating layers is produced from a coating composition which contains a binder system having olefinic double bonds capable of free-radical polymerization and having reactive functional groups within the meaning of addition and/or condensation reactions, the resin solids of the coating composition having a C═C-equivalent weight from 300 to 10,000, preferably from 300 to 8,000, and curing of this (these) coating layer(s) is carried out by irradiation with NIR radiation in the wave length range 760-1500 nm.Type: GrantFiled: May 9, 2001Date of Patent: April 1, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Volker Rekowski, Oliver Reis, Martin Wulf
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Publication number: 20030054118Abstract: A process for the preparation of a coating layer comprising the steps:Type: ApplicationFiled: July 31, 2001Publication date: March 20, 2003Inventors: Volker Rekowski, Oliver Reis, Christine Kurz
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Patent number: 6534130Abstract: A process for the preparation of a multi-layer coating wherein a colour- and/or special effect-imparting base lacquer coating compound is applied to a substrate optionally precoated with a primer and/or primer surfacer coating compound and/or further coating compounds and a clear lacquer layer is then applied to the colour- and/or special effect-imparting base lacquer layer, wherein the colour- and/or special effect-imparting base lacquer coating compound used is one which contains binders which can be cured by free-radical and/or cationic polymerisation under the action of high-energy radiation.Type: GrantFiled: August 21, 2000Date of Patent: March 18, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Karin Maag, Helmut Löffler, Werner Lenhard, Christine Kurz, Frank-Jürgen Krumpolt, Volker Rekowski
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Publication number: 20030031804Abstract: The invention is directed to a process for coating substrates by applying at least one coating composition to an optionally precoated substrate and then curing the coating layer(s) thus obtained, wherein at least one of the coating layers is produced from a coating composition which contains a binder system having olefinic double bonds capable of free-radical polymerization and having reactive functional groups within the meaning of addition and/or condensation reactions, the resin solids of the coating composition having a C═C-equivalent weight from 300 to 10,000, preferably from 300 to 8,000, and curing of this (these) coating layer(s) is carried out by irradiation with NIR radiation in the wave length range 760-1500 nm.Type: ApplicationFiled: May 9, 2001Publication date: February 13, 2003Inventors: Volker Rekowski, Oliver Reis, Martin Wulf
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Patent number: 6509411Abstract: Aqueous, anodically precipitable electrodeposition lacquer, containing A) an aqueous dispersion consisting of anionically modified polyurethane (meth)acrylates (a1) having terminal, ethylenically unsaturated (meth)acrylic double bonds, and reactive thinners (a2) having at least two ethylenically unsaturated (meth)acrylic double bonds, whereby the (meth)acrylic double bonds from the mixture comprising (a1) and (a2) correspond to a bromine number of 20 to 150 g bromine/100 g solids, and B) optionally photo-initiators and/or optionally thermally activable radical initiators, whereby the terminal ethylenically unsaturated (meth)acrylic double bonds from the polyurethane (meth)acrylates are bonded to the anionically modified polyurethane prepolymer via urethane, urea, amide or ester groups, and optionally conventional auxiliary substances and additives, pigments and/or fillers.Type: GrantFiled: May 18, 2001Date of Patent: January 21, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: Andreas Fieberg, Volker Rekowski, Dietrich Saatweber, Hans-Ulrich Simmrock, Bettina Vogt-Birnbrich
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Patent number: 6441078Abstract: Improved aqueous powder coat dispersion, comprising (a) a powder coating dispersed in (b) an aqueous phase, wherein the aqueous phase contains a silica compound selected from the group consisting of (i) 0.2 to 2% by weight, based on the weight of the powder coating, of finely divided silicic acid with large BET-surface; (ii) 0.1 to 1.5% by weight, based on the weight of the powder coating, of layered silicates; and (iii) combinations thereof, exhibit improved sedimentation properties and provide coatings with improved sag characteristics.Type: GrantFiled: March 8, 2000Date of Patent: August 27, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Karl-Friedrich Doessel, Oliver Reis, Volker Rekowski
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Patent number: 6432490Abstract: The process of this invention applies at least one coating composition to an optionally precoated substrate and then cures the thus obtained coating layer(s), whereby at least one of the coating layers is prepared from a coating composition that can be chemically cross-linked solely by radical polymerization of olefinic double bonds, the resin solid of the composition has a C═C equivalent weight from 100 to 10,000, preferably from 100 to 5,000, and the curing of the coating layer(s) is carried out with NIR radiation in the wave length range from 760-1500 nm.Type: GrantFiled: February 12, 2001Date of Patent: August 13, 2002Assignee: E. I. du Pont de Nemours and CompanyInventors: Volker Rekowski, Oliver Reis, Martin Wulf