Patents by Inventor Alexandra Steffens
Alexandra Steffens 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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Patent number: 11958990Abstract: Described herein is a mixer system for producing aqueous coating materials from at least one aqueous pigment paste A, including at least one effect pigment, and at least one pigment-free component B, including an aqueous, acrylate-based microgel dispersion having a glass transition temperature Tg of 50 to 60° C., where both the aqueous pigment paste A and the component B each have a VOC value of less than or equal to 250 g/L. Further described herein is a method for producing aqueous coating materials having a VOC content of 0 to 250 g/L, in which the individual components A and B are stored separately and not mixed until shortly before application, to give the aqueous coating material. Further described herein is a method of using the mixer system of for producing aqueous coating materials for refinishing and/or for coating automobile bodies and/or plastics parts.Type: GrantFiled: July 15, 2020Date of Patent: April 16, 2024Assignee: BASF COATINGS GMBHInventors: Alexandra Steffens, Bernhard Lettmann, Josef Rademacher, Peter Hoffmann
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Publication number: 20220259446Abstract: Described herein is a mixer system for producing aqueous coating materials from at least one aqueous pigment paste A, including at least one color pigment, and at least one pigment-free component B, including an aqueous, acrylate-based microgel dispersion having a glass transition temperature Tg of 50 to 60° C., where both the aqueous pigment paste A and the component B each have a VOC value of less than or equal to 250 g/L. Further described herein is a method for producing aqueous coating materials having a VOC content of 0 to 250 g/L, in which the individual components A and B are stored separately and not mixed until shortly before application, to give the aqueous coating material. Further described herein is a method of using the mixer system for producing aqueous coating materials for refinishing and/or for coating automobile bodies and/or plastics parts.Type: ApplicationFiled: July 15, 2020Publication date: August 18, 2022Inventors: Alexandra Steffens, Bernhard Lettmann, Josef Rademacher, Peter Hoffmann
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Publication number: 20220251401Abstract: Described herein is a mixer system for producing aqueous coating materials from at least one aqueous pigment paste A, including at least one effect pigment, and at least one pigment-free component B, including an aqueous, acrylate-based microgel dispersion having a glass transition temperature Tg of 50 to 60° C., where both the aqueous pigment paste A and the component B each have a VOC value of less than or equal to 250 g/L. Further described herein is a method for producing aqueous coating materials having a VOC content of 0 to 250 g/L, in which the individual components A and B are stored separately and not mixed until shortly before application, to give the aqueous coating material. Further described herein is a method of using the mixer system of for producing aqueous coating materials for refinishing and/or for coating automobile bodies and/or plastics parts.Type: ApplicationFiled: July 15, 2020Publication date: August 11, 2022Inventors: Alexandra Steffens, Bernhard Lettmann, Josef Rademacher, Peter Hoffmann
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Patent number: 9777169Abstract: Solventborne filler comprises at least one alpha,omega-hydroxy-functionalized oligoester which possesses an OH number of 30 to 160 mg KOH/g, a theoretical carbon-carbon double bond content of 1 to 3 mmol/g, a number-average molecular weight of 1000 to 3000 g/mol and a weight-average molecular weight of 2800 to 10 000 g/mol, moreover, the sum of the weight percentage fractions of all the alpha,omega-hydroxy-functionalized oligoesters being 0.5 to 10 wt. %, based on the total amount of the solventborne filler. Also provided are a multicoat paint system, a process for producing a multicoat paint system, and use of the above-designated alpha,omega-hydroxy-functionalized oligoester in solventborne fillers for improving adhesion.Type: GrantFiled: February 7, 2014Date of Patent: October 3, 2017Assignee: BASF Coatings GmbHInventors: Audrée Andersen, Cathrin Corten, Markus Saedler, Fatmir Raka, Frederik Fölling, Nicole Freitag, Stefanie Boshe-Plois, Alexandra Steffens
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Patent number: 9777190Abstract: Disclosed are aqueous coating compositions comprising at least one hydroxyl-containing compound (A), at least one compound (B) having isocyanate groups and also having hydrolyzable silane groups, and at least one catalyst (C) wherein the compound (B) has 10 mol % to less than 90 mol % of at least one structural unit (I) —N(X—SiR?x(OR?)3-x)n(X?—SiR?y(OR?)3-y)m??(I) Where R?=hydrogen, alkyl or cycloalkyl, X, X?=linear and/or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, R?=alkyl, cycloalkyl, aryl or aralkyl, n=0 to 2, m=0 to 2, m+n=2, and x, y=0 to 2, and more than 10 to 90 mol % of at least one structural unit (II) —Z—(X—SiR?x(OR?)3-x) (II), where Z=—NH—, —NR—, —O— or —S—, where R=alkyl, cycloalkyl, aryl or aralkyl, and x, X, R? and R? have the definition indicated for formula (I).Type: GrantFiled: January 4, 2012Date of Patent: October 3, 2017Assignee: BASF Coatings GmbHInventors: Matthijs Groenewolt, Manuela Niemeier, Wilfried Stübbe, Alexandra Steffens, Britta Schnieders
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Patent number: 9777188Abstract: Pigmented aqueous basecoat material comprises at least one alpha, omega-hydroxy-functionalized oligoester having an OH number of 25 to 95 mg KOH/g, a theoretical carbon-carbon double bond content of 0.5 to 2.5 mmol/g, a number-average molecular weight of 2500 to 6000 g/mol and a weight-average molecular weight of 15 000 to 30 000 g/mol, the alpha, omega-hydroxy-functionalized oligoester further comprising at least one partially or completely salified acid group, and the sum of the weight percentage fractions of all the alpha, omega-hydroxy-functionalized oligoesters being 0.5 to 10 wt %, based on the total solids fraction of the pigmented aqueous basecoat material. Also provided are a multicoat paint system, a method of producing a multicoat paint system, and use of the above-identified alpha, omega-hydroxy-functionalized oligoester in pigmented aqueous basecoat materials for the purpose of improving adhesion.Type: GrantFiled: February 7, 2014Date of Patent: October 3, 2017Assignee: BASF Coatings GmbHInventors: Audrée Andersen, Markus Saedler, Fatmir Raka, Nicole Freitag, Britta Schnieders, Alexandra Steffens, Cathrin Corten, Frederik Fölling
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Patent number: 9752048Abstract: A multilayer coating comprising (A) a multicoat paint system comprising (A1) at least one basecoat of a basecoat material comprising at least one melamine resin, and (A2) at least one clearcoat as the topmost coat of the multicoat paint system, and (B) an adhesive layer of a moisture-curing, isocyanate-based adhesive directly atop the topmost clearcoat layer of the multicoat paint system, wherein (i) all amino resins present in the basecoat material are fully methylolated, fully etherified melamine resins in which at least 90% of the etherified methylol groups are etherified with butanol, and (ii) the basecoat material contains at least 1.0% by weight, based on the total weight of the basecoat material, of at least one polyester binder having a hydroxyl number of at least 240 mg KOH/g and an acid number of not more than 10 mg KOH/g, and also a corresponding basecoat material and method of producing, and use of, the multilayer coating for adhesively bonding glass sheets.Type: GrantFiled: April 21, 2010Date of Patent: September 5, 2017Assignee: BASF Coatings GmbHInventors: Norbert Low, Jorn Lavalaye, Alexandra Steffens
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Patent number: 9631113Abstract: An UV- and thermally curable, solventborne clearcoat material suitable for automotive refinishing comprises: (A) at least one polyhydroxy-functional poly(meth)acrylate having grafted-on unsaturated (meth)acrylate side groups, (B) at least one polyisocyanate-functional, poly(meth)acrylate-functional aliphatic urethane, (C) at least one (meth)acrylate-functional aliphatic urethane free from isocyanate groups, (D) at least one hydroxy-functional, (meth)acrylate-functional aliphatic component free from isocyanate groups and from urethane groups and having a molecular weight of not more than 1000 g/mol and a (meth)acrylate functionality of at least 4, (E) at least one aliphatic polymercaptan, (F) at least one phosphoric acid or phosphonic acid blocked with an amine, the amine possessing a pKb of ?3 and a boiling point under atmospheric pressure of >100° C., and (G) at least one photoinitiator selected from the group consisting of ?-hydroxyalkyl phenyl ketones and monoacylphosphine oxides.Type: GrantFiled: July 4, 2013Date of Patent: April 25, 2017Assignee: BASF Coatings GmbHInventors: Josef Rademacher, Egbert Nienhaus, Sibylle Schöps, Alexandra Steffens
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Patent number: 9403182Abstract: Described is a high solids coating composition having exceptional rheological properties and appearances comprising (a) a thermosetting binder, (b) from about 0.1 to about 10 wt. % based on binder solids of solid polyurea particles prepared by the reaction of a mixture of a polyisocyanate and an amino reactant comprising a primary or secondary monoamine that optionally has a hydroxyl or ether group or both, and (c) from about 5 to about 20 wt. % based on binder solids of a cellulose mixed ester having a number average molecular weight of from about 1000 to about 5600, a polydispersity of from about 1.2 to about 3.5, and a total degree of substitution per anhydroglucose unit of from about 3.08 to about 3.5.Type: GrantFiled: November 16, 2012Date of Patent: August 2, 2016Assignee: BASF Coatings GmbHInventors: Timothy S. December, John G. Partyka, Werner-Alfons Jung, Alexandra Steffens
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Publication number: 20150376446Abstract: Pigmented aqueous basecoat material comprises at least one alpha, omega-hydroxy-functionalized oligoester having an OH number of 25 to 95 mg KOH/g, a theoretical carbon-carbon double bond content of 0.5 to 2.5 mmol/g, a number-average molecular weight of 2500 to 6000 g/mol and a weight-average molecular weight of 15 000 to 30 000 g/mol, the alpha, omega-hydroxy-functionalized oligoester further comprising at least one partially or completely salified acid group, and the sum of the weight percentage fractions of all the alpha, omega-hydroxy-functionalized oligoesters being 0.5 to 10 wt %, based on the total solids fraction of the pigmented aqueous basecoat material. Also provided are a multicoat paint system, a method of producing a multicoat paint system, and use of the above-identified alpha, omega-hydroxy-functionalized oligoester in pigmented aqueous basecoat materials for the purpose of improving adhesion.Type: ApplicationFiled: February 7, 2014Publication date: December 31, 2015Inventors: Audrée Andersen, Markus Saedler, Fatmin Raka, Nicole Freitag, Britta Schnieders, Alexandra Steffens, Cathrin Corten, Frederik Gölling
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Publication number: 20150368485Abstract: Solventborne filler comprises at least one alpha,omega-hydroxy-functionalized oligoester which possesses an OH number of 30 to 160 mg KOH/g, a theoretical carbon-carbon double bond content of 1 to 3 mmol/g, a number-average molecular weight of 1000 to 3000 g/mol and a weight-average molecular weight of 2800 to 10 000 g/mol, moreover, the sum of the weight percentage fractions of all the alpha,omega-hydroxy-functionalized oligoesters being 0.5 to 10 wt. %, based on the total amount of the solventborne filler. Also provided are a multicoat paint system, a process for producing a multicoat paint system, and use of the above-designated alpha,omega-hydroxy-functionalized oligoester in solventborne fillers for improving adhesion.Type: ApplicationFiled: February 7, 2014Publication date: December 24, 2015Inventors: Audrée ANDERSEN, Cathrin CORTEN, Markus SAEDLER, Fatmir RAKA, Frederik FÖLLING, Nicole FREITAG, Stefanie BOSHE-PLOIS, Alexandra STEFFENS
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Publication number: 20150322285Abstract: An UV- and thermally curable, solventborne clearcoat material suitable for automotive refinishing comprises: (A) at least one polyhydroxy-functional poly(meth)acrylate having grafted-on unsaturated (meth)acrylate side groups, (B) at least one polyisocyanate-functional, poly(meth)acrylate-functional aliphatic urethane, (C) at least one (meth)acrylate-functional aliphatic urethane free from isocyanate groups, (D) at least one hydroxy-functional, (meth)acrylate-functional aliphatic component free from isocyanate groups and from urethane groups and having a molecular weight of not more than 1000 g/mol and a (meth)acrylate functionality of at least 4, (E) at least one aliphatic polymercaptan, (F) at least one phosphoric acid or phosphonic acid blocked with an amine, the amine possessing a pKb of ?3 and a boiling point under atmospheric pressure of >100° C., and (G) at least one photoinitiator selected from the group consisting of ?-hydroxyalkyl phenyl ketones and monoacylphosphine oxides.Type: ApplicationFiled: July 4, 2013Publication date: November 12, 2015Inventors: Josef Rademacher, Egbert Nienhaus, Sibylle Schöps, Alexandra Steffens
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Publication number: 20150010710Abstract: Described is a high solids coating composition having exceptional rheological properties and appearances comprising (a) a thermosetting binder, (b) from about 0.1 to about 10 wt. % based on binder solids of solid polyurea particles prepared by the reaction of a mixture of a polyisocyanate and an amino reactant comprising a primary or secondary monoamine that optionally has a hydroxyl or ether group or both, and (c) from about 5 to about 20 wt. % based on binder solids of a cellulose mixed ester having a number average molecular weight of from about 1000 to about 5600, a polydispersity of from about 1.2 to about 3.5, and a total degree of substitution per anhydroglucose unit of from about 3.08 to about 3.5.Type: ApplicationFiled: November 16, 2012Publication date: January 8, 2015Inventors: Timothy S. December, John G. Partyka, Werner-Alfons Jung, Alexandra Steffens
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Patent number: 8790752Abstract: Disclosed is a coating composition based on aprotic solvents and comprising at least one hydroxyl-containing compound (A) and at least one compound (B) having isocyanate groups and having at least one silane group of the formula (I) —X—Si—R?xG3-x??(I) with G=identical or different hydrolyzable groups, R?=hydrogen, alkyl or cycloalkyl, X=organic radical, R?=alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2, and characterized in that (i) the compound (B) containing isocyanate groups and silane groups comprises uretdione groups, and (ii) the compound (B) has been prepared from a linear aliphatic diisocyanate. The present invention additionally provides multistage coating methods using these coating compositions, and the use of the coating compositions as clearcoat, and application of the coating method for automotive refinish and/or for the coating of plastics substrates.Type: GrantFiled: March 30, 2011Date of Patent: July 29, 2014Assignee: BASF Coatings GmbHInventors: Matthijs Groenewolt, Alexandra Steffens, Wilfred Stübbe, Wilma Nimz
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Publication number: 20140037851Abstract: Disclosed are aqueous coating compositions comprising at least one hydroxyl-containing compound (A), at least one compound (B) having isocyanate groups and also having hydrolyzable silane groups, and at least one catalyst (C) wherein the compound (B) has 10 mol % to less than 90 mol % of at least one structural unit (I) —N(X—SiR?x(OR?)3-x)n(X?—SiR?y(OR?)3-y)m??(I) Where R?=hydrogen, alkyl or cycloalkyl, X, X?=linear and/or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, R?=alkyl, cycloalkyl, aryl or aralkyl, n=0 to 2, m=0 to 2, m+n=2, and x, y=0 to 2, and more than 10 to 90 mol % of at least one structural unit (II) —Z—(X—SiR?x(OR?)3-x) (II), where Z=—NH—, —NR—, —O— or —S—, where R=alkyl, cycloalkyl, aryl or aralkyl, and x, X, R? and R? have the definition indicated for formula (I).Type: ApplicationFiled: January 4, 2012Publication date: February 6, 2014Applicant: BASF COATINGS GMBHInventors: Matthijs Groenewolt, Manuela Niemeier, Wilfried Stübbe, Alexandra Steffens, Britta Schnieders
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Publication number: 20130209690Abstract: The invention relates to a method for the corrosion-inhibiting coating of metal surfaces, which in a first step involves cleaning the metal surface and optionally treating it with a pretreatment composition and in a second step involves coating the metal surface cleaned and optionally pretreated in step (1) with a primer (P) which comprises at least one binder (BM) and at least one crosslinking agent (V), and also at least one phosphorus-containing polyester component (A), (A) being an acidic esterification product of phosphonic acid, of monophosphoric acid and/or of polyphosphoric acid, and/or of the anhydrides thereof and/or of the esters thereof, with at least one polyester (B) which contains at least two hydroxyl groups.Type: ApplicationFiled: July 20, 2011Publication date: August 15, 2013Applicant: BASF Coatings GmbHInventors: Rafael Bautista Mester, Alexandra Steffens
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Publication number: 20130136865Abstract: Disclosed is a coating composition based on aprotic solvents and comprising at least one hydroxyl-containing compound (A) and at least one compound (B) having isocyanate groups and having at least one silane group of the formula (I) —X—Si—R?xG3-x??(I) with G=identical or different hydrolyzable groups, R?=hydrogen, alkyl or cycloalkyl, X=organic radical, R?=alkyl, cycloalkyl, aryl or aralkyl, x=0 to 2, and characterized in that (i) the compound (B) containing isocyanate groups and silane groups comprises uretdione groups, and (ii) the compound (B) has been prepared from a linear aliphatic diisocyanate. The present invention additionally provides multistage coating methods using these coating compositions, and the use of the coating compositions as clearcoat, and application of the coating method for automotive refinish and/or for the coating of plastics substrates.Type: ApplicationFiled: March 30, 2011Publication date: May 30, 2013Applicant: BASF COATINGS GMBHInventors: Matthijs Groenewolt, Alexandra Steffens, Wilfred Stübbe, Wilma Nimz
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Publication number: 20120045632Abstract: A multilayer coating comprising (A) a multicoat paint system comprising (A1) at least one basecoat of a basecoat material comprising at least one melamine resin, and (A2) at least one clearcoat as the topmost coat of the multicoat paint system, and (B) an adhesive layer of a moisture-curing, isocyanate-based adhesive directly atop the topmost clearcoat layer of the multicoat paint system, wherein (i) all amino resins present in the basecoat material are fully methylolated, fully etherified melamine resins in which at least 90% of the etherified methylol groups are etherified with butanol, and (ii) the basecoat material contains at least 1.0% by weight, based on the total weight of the basecoat material, of at least one polyester binder having a hydroxyl number of at least 240 mg KOH/g and an acid number of not more than 10 mg KOH/g, and also a corresponding basecoat material and method of producing, and use of, the multilayer coating for adhesively bonding glass sheets.Type: ApplicationFiled: April 21, 2010Publication date: February 23, 2012Applicant: BASF COATINGS GMBHInventors: Norbert Low, Jorn Lavalaye, Alexandra Steffens
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Publication number: 20110111130Abstract: The invention describes a method of coating coils, comprising the following steps: (1) applying an aqueous primer coating composition (B) comprising at least one crosslinkable binder system (BM), at least one filler component (BF), at least one corrosion control component (BK), and volatile constituents (BL), to the optionally cleaned metal surface, the coating composition (B) having an organic solvent content of not more than 15% by weight, based on the volatile constituents (BL) of the coating composition (B), (2) drying the integrated pretreatment film formed from the primer coating composition (B), (3) applying a topcoat film (D) to the integrated pretreatment film dried as per step (2), and (4) jointly curing the films of coating composition (B) and topcoat (D).Type: ApplicationFiled: April 30, 2009Publication date: May 12, 2011Applicant: BASF COATINGS GMBHInventors: Markus Hickl, Alexandra Steffens