Patents by Inventor Erhard Luehmann
Erhard Luehmann 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: 9676894Abstract: The present invention relates to radiation-curable, aqueous dispersions based on polyurethane acrylates (i), which are characterized in that the polyurethane acrylate (i) comprises as builder components A) one or more aromatic polyepoxy(meth)acrylates with an OH number of from 20 to 300 mg of KOH/g of substance, C) one or more oligo- or polyesters containing unsaturated fatty acids with an OH number of from 15 to 300 mg of KOH/g of substance and an iodine number of greater than 50 g of I2/100 g of substance, E) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action and F) one or more organic polyisocyanates, a process for the preparation thereof, the use of the coating compositions as lacquers and/or adhesives, and objects and substrates provided with these lacquers and/or adhesives.Type: GrantFiled: February 25, 2011Date of Patent: June 13, 2017Assignee: Covestro Deutschland AGInventors: Stefan Sommer, Erhard Luehmann, Julián Flores
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Patent number: 9567423Abstract: The present invention relates to a process for the preparation of low-viscosity, radiation-curable, aqueous dispersions based on polyurethane acrylates (UV-PUDs), wherein the UV-PUDs hydrophilized via hydroxy-functionalized carboxylic acids have a lower initial viscosity when a large part of the urethanization, that is to say the reaction of the NCO-functionalized compounds with the OH-functionalized compounds, initially takes place in the absence of the acid-carrying compounds and the incorporation of the acid-carrying compounds via their hydroxyl function takes place as late as possible.Type: GrantFiled: December 13, 2010Date of Patent: February 14, 2017Assignee: Covestro Deutschland AGInventors: Stefan Sommer, Thorsten Rische, Erhard Luehmann
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Patent number: 9321893Abstract: The present invention relates to a process for the production of radiation-cured foams, characterized in that the radiation-cured foams are produced by 1) foaming of an aqueous composition A), 2) thermal drying of the foam produced from step 1), 3) curing of the foam by actinic radiation, the radiation-curable aqueous compositions A), the radiation-cured foams produced by the process according to the invention and the use of the radiation-cured foams for coating substrates.Type: GrantFiled: March 4, 2011Date of Patent: April 26, 2016Assignee: Covestro Deutschland AGInventors: Stefan Sommer, Jan Weikard, Holger Casselmann, Thomas Michaelis, Erhard Lühmann
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Patent number: 8933146Abstract: The present invention describes the preparation of an aqueous polyurethane dispersion which is cured by radiation, and its use as binder.Type: GrantFiled: August 6, 2008Date of Patent: January 13, 2015Assignee: Bayer MaterialScience AGInventors: Stefan Sommer, Richard Kopp, Harald Blum, Christoph Irle, Jan Weikard, Erhard Luehmann
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Patent number: 8865832Abstract: The present invention relates to radiation-curable coating compositions based on tin-free aqueous polyurethane dispersions based on polyurethane acrylates (i), characterized in that the polyurethane acrylate (i) comprises as builder components A) one or more compounds with at least one group which is reactive towards isocyanate and at least one unsaturated group which can undergo free radical polymerization, B) one or more compounds which differ from A) and have at least one group which is reactive towards isocyanate, C) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action, D) one or more organic polyisocyanates, which are reacted in the presence of F) bismuth(III) salt(s) and G) an acid having a pKa of <2.5, and a process for the preparation thereof, the use of the coating compositions as lacquers and/or adhesives, and objects and substrates provided with these lacquers and/or adhesives.Type: GrantFiled: October 29, 2010Date of Patent: October 21, 2014Assignee: Bayer MaterialScience AGInventors: Stefan Sommer, Erhard Luehmann, Thorsten Rische, Jürgen Lippemeier
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Patent number: 8647471Abstract: The present invention relates to a process for the production of sized and/or wet-strength papers, paperboards or cardboards, wherein an aqueous radiation-curable dispersion containing water and at least one polymer, characterized in that the polymer contains cationic groups, is mixed with suspended wood pulp and/or chemical pulp and this mixture is sieved, pressed, thermally dried and then radiation-cured, characterized in that the dispersion is employed in amounts, based on its non-aqueous content in relation to the solid content of the wood pulp and/or chemical pulp, of from 0.001 to 10 wt. %, the papers, paperboards and cardboards produced by this process, and compositions comprising suspended wood pulp and/or chemical pulp and an aqueous radiation-curable dispersion containing at least one polymer, characterized in that the polymer contains cationic groups.Type: GrantFiled: December 22, 2010Date of Patent: February 11, 2014Assignees: Bayer MaterialScience LLC, Bayer MaterialScience AGInventors: Stefan Sommer, Erhard Luehmann, Serkan Unal, Micheal J. Dvorchak
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Publication number: 20130273359Abstract: The present invention relates to the use of aqueous UV-reactive primers for the coating of substrates based on ethylene vinyl acetate copolymers (EVA copolymers) or rubber. The present invention further provides a novel method for joining articles using an aqueous UV-reactive primer.Type: ApplicationFiled: November 21, 2011Publication date: October 17, 2013Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Wolfgang Arndt, Erhard Luehmann, Stefan Sommer, Jan Weikard, Lucy Bai, Jane Sum, Henry Zhao
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Publication number: 20130041072Abstract: The present invention relates to radiation-curable, aqueous dispersions based on polyurethane acrylates (i), which are characterized in that the polyurethane acrylate (i) comprises as builder components A) one or more aromatic polyepoxy(meth)acrylates with an OH number of from 20 to 300 mg of KOH/g of substance, C) one or more oligo- or polyesters containing unsaturated fatty acids with an OH number of from 15 to 300 mg of KOH/g of substance and an iodine number of greater than 50 g of I2/100 g of substance, E) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action and F) one or more organic polyisocyanates, a process for the preparation thereof, the use of the coating compositions as lacquers and/or adhesives, and objects and substrates provided with these lacquers and/or adhesives.Type: ApplicationFiled: February 25, 2011Publication date: February 14, 2013Inventors: Stefan Sommer, Erhard Luehmann, Julián Flores
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Publication number: 20120329895Abstract: The present invention relates to a process for the production of radiation-cured foams, characterized in that the radiation-cured foams are produced by 1) foaming of an aqueous composition A), 2) thermal drying of the foam produced from step 1), 3) curing of the foam by actinic radiation, the radiation-curable aqueous compositions A), the radiation-cured foams produced by the process according to the invention and the use of the radiation-cured foams for coating substrates.Type: ApplicationFiled: March 4, 2011Publication date: December 27, 2012Applicant: Bayer Intellectual Property GmbHInventors: Stefan Sommer, Jan Weikard, Holger Casselmann, Thomas Michaelis, Erhard Lühmann
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Publication number: 20120259065Abstract: The present invention relates to a process for the preparation of low-viscosity, radiation-curable, aqueous dispersions based on polyurethane acrylates (UV-PUDs), wherein the UV-PUDs hydrophilised via hydroxy-functionalised carboxylic acids have a lower initial viscosity when a large part of the urethanisation, that is to say the reaction of the NCO-functionalised compounds with the OH-functionalised compounds, initially takes place in the absence of the acid-carrying compounds and the incorporation of the acid-carrying compounds via their hydroxyl function takes place as late as possible.Type: ApplicationFiled: December 13, 2010Publication date: October 11, 2012Applicant: Bayer Intellectual Property GmbHInventors: Stefan Sommer, Thorsten Rische, Erhard Luehmann
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Patent number: 8231976Abstract: The present invention describes block-resistant, radiation-curable coating systems based on high molecular mass, aqueous polyurethane dispersions, a process for preparing them, the use of the coating systems as paints and/or adhesives, and also articles and substrates provided with these paints and/or adhesives.Type: GrantFiled: April 24, 2009Date of Patent: July 31, 2012Assignee: Bayer MaterialScience AGInventors: Stefan Sommer, Jan Weikard, Erhard Luehmann
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Publication number: 20120160437Abstract: The present invention relates to a process for the production of sized and/or wet-strength papers, paperboards or cardboards, wherein an aqueous radiation-curable dispersion containing water and at least one polymer, characterized in that the polymer contains cationic groups, is mixed with suspended wood pulp and/or chemical pulp and this mixture is sieved, pressed, thermally dried and then radiation-cured, characterized in that the dispersion is employed in amounts, based on its non-aqueous content in relation to the solid content of the wood pulp and/or chemical pulp, of from 0.001 to 10 wt. %, the papers, paperboards and cardboards produced by this process, and compositions comprising suspended wood pulp and/or chemical pulp and an aqueous radiation-curable dispersion containing at least one polymer, characterized in that the polymer contains cationic groups.Type: ApplicationFiled: December 22, 2010Publication date: June 28, 2012Applicants: Bayer MaterialScience AG, Bayer MaterialScience LLCInventors: Stefan Sommer, Erhard Luehmann, Serkan Unal, Michael J. Dvorchak
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Publication number: 20120041131Abstract: The present invention relates to radiation-curable coating compositions based on tin-free aqueous polyurethane dispersions based on polyurethane acrylates (i), characterized in that the polyurethane acrylate (i) comprises as builder components A) one or more compounds with at least one group which is reactive towards isocyanate and at least one unsaturated group which can undergo free radical polymerization, B) one or more compounds which differ from A) and have at least one group which is reactive towards isocyanate, C) one or more compounds with at least one group which is reactive towards isocyanate and additionally at least one group having a hydrophilizing action, D) one or more organic polyisocyanates, which are reacted in the presence of F) bismuth(III) salt(s) and G) an acid having a pKa of <2.5, and a process for the preparation thereof, the use of the coating compositions as lacquers and/or adhesives, and objects and substrates provided with these lacquers and/or adhesives.Type: ApplicationFiled: October 29, 2010Publication date: February 16, 2012Applicant: Bayer MaterialScience AGInventors: Stefan Sommer, Erhard Luehmann, Thorsten Rische, Jürgen Lippemeier
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Patent number: 7868055Abstract: Aqueous UV-hardenable dispersions are provided, as well as their use for the production of coating agents, in particular coatings for ligneous substrates.Type: GrantFiled: January 30, 2008Date of Patent: January 11, 2011Assignee: Bayer MaterialScience AGInventors: Harald Blum, Erhard Luehmann, Stefan Sommer, Christoph Irle
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Publication number: 20090269589Abstract: The present invention describes block-resistant, radiation-curable coating systems based on high molecular mass, aqueous polyurethane dispersions, a process for preparing them, the use of the coating systems as paints and/or adhesives, and also articles and substrates provided with these paints and/or adhesives.Type: ApplicationFiled: April 24, 2009Publication date: October 29, 2009Inventors: Stefan Sommer, Jan Weikard, Erhard Luehmann
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Publication number: 20090269568Abstract: The present invention relates to a film, further comprising a radiation-curing coating, wherein the coating comprises a polyurethane polymer which contains (meth)acrylate groups and which is obtainable from the reaction of a reaction mixture comprising (a) polyisocyanates and (b1) compounds which comprise (meth)acrylate groups and are reactive towards isocyanates and wherein the coating further comprises inorganic nanoparticles with an average particle size of ?1 nm to ?200 nm. It also relates to a process for the production of such coated films, the use of such films for the production of shaped articles, a process for the production of shaped articles with a radiation-cured coating and shaped articles which can be produced by this process.Type: ApplicationFiled: April 27, 2009Publication date: October 29, 2009Applicant: Bayer MaterialScience AGInventors: Timo Kuhlmann, Klaus Meyer, Stefan Sommer, Erhard Luehmann, Jan Weikard
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Publication number: 20090053530Abstract: The present invention describes the preparation of an aqueous polyurethane dispersion which is cured by radiation, and its use as binder.Type: ApplicationFiled: August 6, 2008Publication date: February 26, 2009Inventors: Stefan Sommer, Richard Kopp, Harald Blum, Christoph Irle, Jan Weikard, Erhard Luehmann
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Publication number: 20080194775Abstract: Aqueous UV-hardenable dispersions are provided, as well as their use for the production of coating agents, in particular coatings for ligneous substrates.Type: ApplicationFiled: January 30, 2008Publication date: August 14, 2008Inventors: Harald Blum, Erhard Luehmann, Stefan Sommer, Christoph Irle
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Publication number: 20080145624Abstract: The present invention relates to printed films, to a process for printing said films, to the curing of layers applied by printing processes, and to molded articles produced from said layers.Type: ApplicationFiled: October 29, 2007Publication date: June 19, 2008Inventors: Jan Weikard, Klaus Meyer, Hans Braun, Roland Kunzel, Erhard Luehmann, Diethelm Rappen, Nicolas Stoeckel
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Patent number: 6960639Abstract: Aqueous coating compositions based on polyurethane dispersions which cure under the influence of high-energy radiation, to a process for preparing them and to their use. The coating compositions contain a polyisocyanate, a polyurethane containing free-radically polymerizable groups, and an initiator which is capable of initiating a free-radical polymerization.Type: GrantFiled: June 10, 2003Date of Patent: November 1, 2005Assignee: Bayer AktiengesellschaftInventors: Jan Weikard, Erhard Lühmann, Christoph Irle, Thorsten Rische, Karin Naujoks, Thomas Feller, Jan Mazanek