Patents Represented by Attorney Steven C. Benjamin
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Patent number: 6958367Abstract: A coating composition comprising (a) 10 to 60 wt. % of one or more hydroxy-, carboxy- and/or amino-functionalized solid resins selected from the group of methacrylic resins, acrylic resins, polyester resins, polyurethane resins, epoxy modified resins with linear, branched or star structure, (b) 5 to 40 wt. % of one or more crosslinking agents for component (a), (c) 5 to 70 wt. % of a filler, such as, aluminum hydroxide, (d) 0 to 40 wt. % of a ground polymer material, (e) 0 to 35 wt. % of organic solvents, (f) 0.01 to 15 wt. % % of additives and pigments and (g) 0 to 30 wt. % reactive thinners.Type: GrantFiled: April 25, 2003Date of Patent: October 25, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Richard Milic, Zdenka Kupcakova
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Patent number: 6958171Abstract: The invention relates to a process for repairing coated substrate surfaces comprising the following successive steps: a) optionally, preparing a blemished area to be repaired, b) providing at least one backing film coated on one side with an uncured or at least only partially cured coating layer of a thermally curable coating composition, c) applying the at least one backing film with its coated side onto the blemished area to be repaired, d) supplying thermal energy to the coating applied in this manner onto the blemished area to be repaired and e) removing the at least one backing film, wherein the supply of thermal energy onto the coating proceeds through the at least one backing film, and/or after removal of the at least one backing film.Type: GrantFiled: December 14, 2001Date of Patent: October 25, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Carmen Flosbach, Karl-Friedrich Doessel, Werner Lenhard, Oliver Reis, Thomas Fey
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Patent number: 6939605Abstract: A multi-layer coating for coating a substrate surface, comprising at least one color-imparting layer, which contains three-dimensional photonic crystals as effect-imparting interference pigments.Type: GrantFiled: May 19, 2003Date of Patent: September 6, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Peter Frese, Klaus Taennert, Martin Wulf, Rudolf Zentel, Marc Egen
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Patent number: 6933005Abstract: A method for repairing a basecoat/clearcoat finish or coating comprised of a fluorinated organosilane topcoat. A fluorourethane star polyester additive is added to the fluorinated organosilane topcoat composition to improve recoat adhesion with the repair basecoat.Type: GrantFiled: September 22, 2003Date of Patent: August 23, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: William F. Graham, Douglas Robert Anton, Jeffery W. Johnson, Michael Joseph Michalczyk, Sape Kwesi Quashie
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Patent number: 6933006Abstract: A process for the production of a coating layer from a coating composition curable with high-energy radiation on a substrate, comprising the successive steps: a) providing a substrate to be coated, b) applying a backing foil coated on one side with an uncured or at least only partially cured coating layer of a coating composition curable by means of high-energy radiation, with its coated side on the entire surface or at least one sub-zone of the surface of the substrate, c) irradiating the entire coating applied in step b) with high-energy radiation, and d) removing the backing foil from the coating which remains on the substrate; wherein irradiation of the coating proceeds through the backing foil and/or after removal of the backing foil.Type: GrantFiled: July 1, 2003Date of Patent: August 23, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Thomas Fey, Oliver Reis, Carmen Flosbach, Stuart Kernaghan, Karl-Friedrich Doessel
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Patent number: 6929823Abstract: A process for the high-speed rotary application of a liquid coating agent containing at least one pigment and/or at least one extender onto a substrate, wherein the process comprises the steps: (a) directly supplying at least two liquid components in a specified quantity ratio which determines the qualitative and quantitative composition of the coating agent to at least one high-speed rotary atomizer or preparation of a premix from at least two liquid components in a specified quantity ratio which determines the qualitative and quantitative composition of the coating agent and supply of the premix to at least one high-speed rotary atomizer, (b) high-speed rotary atomizing the components directly supplied in step (a) or of the premix supplied in step (a) to the at least one high-speed rotary atomizer and (c) applying the material atomized in step (b) onto a substrate, wherein at least one of the components used in step (a) contains at least one pigment and/or at least one extender.Type: GrantFiled: May 1, 2003Date of Patent: August 16, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Dirk Holfter
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Patent number: 6919004Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a crosslinking agent; wherein the improvement is the use of a crosslinking agent having at least one, preferably a plurality of morpholine dione groups per molecule. Electrodeposited finishes are formed that have reduced volatile emissions and film weight loss when heated to cure.Type: GrantFiled: July 2, 2002Date of Patent: July 19, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Albert G. Anderson, Allisa Gam
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Patent number: 6917424Abstract: An improved process for making pigment dispersions containing a single pigment that match the tinting strength of a standard dispersion. The process employs a faster and more accurate wet measurement technique for analyzing and matching the dispersions to a standard that utilizes the spectral transmittance of the wet dispersions over the visible spectrum.Type: GrantFiled: March 13, 2002Date of Patent: July 12, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Allan Blase Joseph Rodrigues, Ken Stephen Schermacher, Anthony Joseph Martino, Douglas E. Spahr
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Patent number: 6914102Abstract: A thermally curable hot-melt adhesive composition, comprising a polyurethane prepolymer having isocyanate groups, wherein at least 50% of the reactive isocyanate groups of the prepolymer are blocked, said prepolymer being the reaction product of (1) 20 to 40 wt % of at least one straight-chain amorphous polyester having a number average molecular mass Mn of 3000 to 6000 with (2) 40 to 60 wt % of at least one polyurethane elastomer, (3) 10 to 20 wt % of at least one polyester elastomer, (4) at least one diisocyanate, (5) at least one polyol as a chain extender, and (6) at least one blocking agent; and at least one isocyanate reactive component selected from the group consisting of polyalcohols, polyamines and hydroxy-functionalized epoxide resins; wherein the percentages are based on the total weight of polyester, polyurethane elastomer and polyester elastomer.Type: GrantFiled: November 21, 2003Date of Patent: July 5, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Olaf Kleineberg, Engin Temeltas, Heinz-Peter Pfeiffer
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Patent number: 6908539Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a polyisocyanate crosslinking agent; wherein the improvement is the use of a polyisocyanate crosslinking agent having at least one crosslinkable morpholine dione group per molecule. Electrodeposited finishes are formed that have reduced volatile emissions and film weight loss when heated to cure.Type: GrantFiled: July 2, 2002Date of Patent: June 21, 2005Assignee: E.I. du Pont de Nemours and CompanyInventors: Albert G. Anderson, Allisa Gam
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Patent number: 6908692Abstract: An electrically conductive wire coated with a curable coating composition that forms a cured coating having a high partial discharge resitance and good mechanical properties. A process for coating an electrically conductive wire with a curable coating composition and curing the coating composition to form a coating having high partial discharge resistance and good mechanical properties.Type: GrantFiled: March 1, 2000Date of Patent: June 21, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Frank-Rainer Böhm, Gerhard Kiessling, Manfred Oppermann, Heinz Schindler
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Patent number: 6902820Abstract: Coating compositions comprising: A) least one hydroxy-functional polyester with at least two hydroxyl groups per molecule, wherein at least one of which hydroxyl groups is a tertiary hydroxyl group, and the polyester has a number average molecular weight Mw of 200 to 5000, and contains as a structural element 10-90 wt-%, relative to the total quantity of polyester, of at least one acid ester group comprising a tertiary hydroxyl group and of the following general formula I ?wherein R1 is a single bond or a C1-C6 alkyl group, R2 and R3 mutually independently mean a C1-C4 alkyl group, B) optionally, at least one additional hydroxy-functional binder other than A) and C) at least one cross-linking agent which is capable of entering into a cross-linking reaction with the OH-groups of components A) and B.Type: GrantFiled: September 25, 2003Date of Patent: June 7, 2005Assignee: E.I. du Pont de Nemours and CompanyInventors: Jos Huybrechts, Ann Vaes, Lieve Bastin, Leen Tanghe
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Patent number: 6891617Abstract: An apparatus, and method of use thereof, for multiangular visual evaluations of color properties of paint color samples which contain metallic flakes, comprising a cylindrical or semi-cylindrical shaped body capable of securing a color sample panel upon the central axis, wherein the circumference of the body has a partially glossy or mirrored reflective surface, and also has one or more marks indicating specific aspecular viewing angles relative to the plane of a color sample panel, thus allowing for improved correlation between visual and instrumental color evaluations of coated surfaces which contain metallic flakes.Type: GrantFiled: September 18, 2002Date of Patent: May 10, 2005Assignee: E.I. du Pont de Nemours and CompanyInventor: David H. Alman
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Patent number: 6888636Abstract: An apparatus for inspection of fluids having a fluid analysis cell with a cavity therein enclosed by two light transmitting windows and having a spacer member fixedly positioned therebetween which provides a fluid analysis chamber of fixed pathlength where fluid flows by the windows and preferably wherein the flow laminar and at a uniform shear to provide accurate color measurements. Light transmitting and receiving probes are positioned adjacent to the viewing windows and wherein the faces of each probe are contiguous and flush with the viewing windows but are separated from the flow by the viewing windows, so that transmission measurements can be taken orthogonal to the direction of flow. The apparatus is particularly useful in the manufacture of dispersions and tints used in the manufacture of paints, so that the color of material being made can be accurately matched to a standard color in the wet state with confidence that the color will match in the dry state.Type: GrantFiled: March 13, 2002Date of Patent: May 3, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Anthony Joseph Martino, Ken Stephen Schermacher, Larry Eugene Steenhoek, Timothy Aaron Snyder, Robert Averitt, Robert E. Bucher, Jr.
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Patent number: 6881762Abstract: A process for recycling of powder coating waste comprising the steps of (1) compressing powder coating waste to powder coating compacts having a volume of 0.5 mm3 to 15 cm3 by applying pressing forces; (2) placing the formed powder coating compacts into a vessel, rotating the vessel about a rotational axis inclined at an angle of 20 to 70 degrees relative to the horizontal and (3) heating the powder coating compacts while being moved in the rotating vessel until through-glassed powder coating bodies are formed.Type: GrantFiled: September 26, 2002Date of Patent: April 19, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Rene Graewe, Volker Paschmann, Marek Nowak
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Patent number: 6875514Abstract: A coating composition comprising a film forming binder of a. an acrylic polymer having pendant groups that are reactive with isocyanate moieties and having a glass transition temperature (Tg) of 10 to 80°C.; b. a polytrimethylene ether diol having a Mn (number average molecular weight) of 500 to 5,000; and c. an organic polyisocyanate crosslinking agent; wherein the coating composition contains pigments and cures at ambient temperatures or elevated temperatures and forms a coating that is sandable and when used in combination with a top coat, for example, a colored base coat and clear coat or a pigmented mono-coat forms a chip resistant multi-layer coating useful for refinishing or repairing automotive and truck bodies and parts.Type: GrantFiled: March 21, 2003Date of Patent: April 5, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Patricia Mary Ellen Sormani, Hari Babu Sunkara, James William O'Neil, Joseph V. Kurian
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Patent number: 6867861Abstract: An apparatus for inspection of fluids, particularly dispersions and tints, having a fluid analysis cell with a cavity therein defining a fluid analysis chamber, fluid inlet and outlets extending from the cavity in opposite directions to enable fluid flow into and out of the analysis chamber, and a light transmitting probe and a light receiving probe extending within the cavity juxtaposed from each other across the flow path in spaced apart relation, with the probes being movable relative to each other, thus providing a fluid analysis chamber having an adjustable pathlength and allowing flow across and around the faces of the probes for pressure relief of the fluid, to provide accurate color measurements. The apparatus is particularly useful in the manufacture of dispersions and tints used in the manufacture of paints, so that the color of material being made can be accurately matched to a standard color in the wet state with confidence that the color will match in the dry state.Type: GrantFiled: March 13, 2002Date of Patent: March 15, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Anthony Joseph Martino, Ken Stephen Schermacher, Kelly Regan Smolcynski, Michael P. Milone
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Patent number: 6852803Abstract: A polymer dispersant for pigments based on a graft copolymer which contains a new type of urea functional group as the pigment anchoring group. The urea groups are attached to the graft copolymer by a convenient method which involves reaction of hydroxyl functional groups built in the graft copolymer with a diisocyanate that is capped at one end with ammonia or a primary or secondary amine. The reaction is convenient and clean. Substantial crosslinking or gelling of the polymer can be easily avoided by judicious selection of appropriate ingredients and processing conditions. These materials are effective in dispersing and stabilizing a wide range of pigments in solvent based systems and are particularly useful in forming pigment dispersions that are used in a variety of solvent borne coating compositions for automobiles and trucks, where they provide improved efficiency of pigment use, lower paint viscosity, and reduced emission of volatile organic solvent.Type: GrantFiled: June 3, 2002Date of Patent: February 8, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Sheau-Hwa Ma
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Patent number: 6849169Abstract: Use of homopolymers or copolymers of 2-ethyl hexyl acrylate as an additive in aqueous cathodically depositable coatings to suppress the formation of surface defects in coating films, in which the proportion by mass of the comonomers in the monomer mixture used for the preparation of the copolymers does not exceed 35%.Type: GrantFiled: April 30, 1999Date of Patent: February 1, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Helmut Hoenig, Georg Pampouchidis, Gerald Hobisch
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Patent number: 6849822Abstract: A coating composition useful as an electrical insulation layer for metal conductors, particularly wires, that has improved de-coating properties for the partial de-coating of coated conductor by the use of laser irradiation; the coating composition comprises A) 1 wt. % to 90 wt. %, based on the total weight of the binder, of one or more binders, B) 0.3 wt. % to 25 wt. %, based on the total weight of the binder, of one or more reactive particles based on an element-oxygen bound network with elements from the series of aluminum, tin, boron, germanium, gallium, lead, silicon, zinc, the transition metals and the lanthanides and actinides, and C) 0 wt. % to 95 wt.Type: GrantFiled: February 13, 2004Date of Patent: February 1, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Gerhard Kiessling, Frank-Rainer Boehm, Hans-Georg Hinderer