Patents by Inventor Rüdiger Landers
Rüdiger Landers 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: 20220106432Abstract: Shaped flexible PU foam articles, preferably mattresses and/or cushions, may use a flexible polyurethane foam obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one blowing agent and one or more catalysts that catalyze the isocyanate-polyol and/or isocyanate-water reactions and/or isocyanate trimerization and further additives, wherein the additives include one or more organic esters.Type: ApplicationFiled: September 21, 2021Publication date: April 7, 2022Applicant: Evonik Operations GmbHInventors: Daniela HERMANN, Annegret TERHEIDEN, Ruediger LANDERS, Rainer ZIEGLER, Dominik SCHUCH
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Publication number: 20220017680Abstract: Process for producing cold-cure flexible slabstock PU foams by reaction of at least one polyol component and at least one isocyanate component in the presence of water and at least one catalyst and at least one crosslinker, wherein no nitrogen-containing crosslinkers having an expanded OH number above 1000 mg KOH/g are employed in a total amount >0.5 parts by weight, preferably >0.1 parts by weight, based on 100 parts by weight of polyol.Type: ApplicationFiled: July 5, 2021Publication date: January 20, 2022Applicant: Evonik Operations GmbHInventors: Harald Modro, Kai-Oliver Feldmann, Mladen Vidakovic, Rüdiger Landers, Daniela Hermann
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Publication number: 20210253780Abstract: Process for producing PU foams by reacting at least one polyol component with at least one isocyanate component in the presence of one or more catalysts that catalyze the isocyanate-polyol and/or isocyanate-water and/or isocyanate trimerization reactions, and optionally one or more chemical or physical blowing agents, with use of SiOC-linked, linear polydialkylsiloxane-polyoxyalkylene block copolymers having repeat (AB) units, obtainable through the reaction of polyether diols with equilibrated ?,?-diacetoxypolydialkylsiloxanes, wherein a sufficient amount of the SiOC-linked, linear polydialkylsiloxane-polyoxyalkylene block copolymers having repeat (AB) units is added such that the proportion by mass of said component based on the finished PU foam is from 0.0001% to 10% by weight, preferably 0.01% to 6% by weight, especially 0.05% to 5% by weight.Type: ApplicationFiled: January 6, 2021Publication date: August 19, 2021Applicant: Evonik Operations GmbHInventors: Isabelle Denise Wessely, Annegret Terheiden, Rüdiger Landers, Roland Hubel, Wilfried Knott, Dagmar Windbiel, Horst Dudzik
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Publication number: 20210137276Abstract: What are described are shaped hot-cure flexible PU foam articles, preferably mattresses and/or cushions, wherein the hot-cure flexible polyurethane foam has been obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one compound of formula (1a) and at least one compound of formula (1b) and at least one blowing agent and at least one catalyst.Type: ApplicationFiled: October 14, 2020Publication date: May 13, 2021Applicant: Evonik Operations GmbHInventors: Rüdiger Landers, Daniela Hermann, Isabelle Denise Wessely, Michael Ferenz, Rainer Ziegler
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Publication number: 20210015269Abstract: Shaped PU foam articles, preferably mattresses and/or cushions, wherein the polyurethane foam has been obtained by reaction of at least one polyol component and at least one isocyanate component in the presence of at least one compound of formula (1a) and at least one compound of formula (1b) and at least one blowing agent, are described.Type: ApplicationFiled: June 12, 2020Publication date: January 21, 2021Applicant: Evonik Operations GmbHInventors: Annegret Terheiden, Rüdiger Landers, Daniela Hermann, Jane Garrett Kniss, Robert Borgogelli, Kathie White, Isabelle Denise Wessely
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Patent number: 9982085Abstract: Described are a method of producing polyurethane foam comprising polyolefin-based polyols by using an additive composition comprising at least one ionic surfactant A selected from ionic surfactants of formula A?M+, where A?=anion selected from the group consisting of alkyl sulphates, aryl sulphates, sulphonates, polyether sulphates, polyether sulphonates, alkyl sulphonates, aryl sulphonates, alkyl carboxylates, aryl carboxylates, saccharinates and polyether phosphates, and M+=cation, and/or at least one ionic surfactant B selected from a quaternized ammonium compound, and also at least a tertiary amine compound C having a molar mass of at least 150 g/mol, and/or an oxazasilinane D, and also polyurethane foams thus obtained and their use.Type: GrantFiled: March 3, 2014Date of Patent: May 29, 2018Assignee: EVONIK DEGUSSA GMBHInventors: Ruediger Landers, Annegret Terheiden, Roland Hubel
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Publication number: 20160046757Abstract: Described are a method of producing polyurethane foam comprising polyolefin-based polyols by using an additive composition comprising at least one ionic surfactant A selected from ionic surfactants of formula A?M+, where A?=anion selected from the group consisting of alkyl sulphates, aryl sulphates, sulphonates, polyether sulphates, polyether sulphonates, alkyl sulphonates, aryl sulphonates, alkyl carboxylates, aryl carboxylates, saccharinates and polyether phosphates, and M+=cation, and/or at least one ionic surfactant B selected from a quaternized ammonium compound, and also at least a tertiary amine compound C having a molar mass of at least 150 g/mol, and/or an oxazasilinane D, and also polyurethane foams thus obtained and their use.Type: ApplicationFiled: March 3, 2014Publication date: February 18, 2016Applicant: EVONIK DEGUSSA GMBHInventors: Ruediger LANDERS, Annegret TERHEIDEN, Roland HUBEL
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Patent number: 8946311Abstract: The object of the invention is a method for producing polyurethane and/or polyisocyanurate insulating foam based on foaming reaction mixtures containing polyisocyanates, compounds having reactive hydrogen atoms, propellants, stabilizers, nucleation agents, and optionally further additives, which is characterized in that porous solids, in particular silicates having a zeolite structure, are used as the nucleation agents.Type: GrantFiled: December 22, 2008Date of Patent: February 3, 2015Assignee: Evonik Degussa GmbHInventors: Carsten Schiller, Matthias Naumann, Ruediger Landers, Christian Eilbracht
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Publication number: 20150031781Abstract: The present invention is directed to the use of a disalt of malic acid in the production of a polyurethane foam to lower the glass transition temperature of the polyurethane foam obtained, wherein the disalt of malic acid is added to the reaction mixture comprising at least a polyol component, an isocyanate component, a catalyst to catalyse urethane or isocyanurate bond formation, an optional blowing agent and optionally further additives, and also to a polyurethane foam having a glass transition temperature of ?20° C. to 15° C., which polyurethane foam is characterized in that it comprises disalts of malic acid or reaction products thereof with an isocyanate component, wherein the fraction accounted for by the disalts and the reaction products thereof with an isocyanate component is below 0.08 wt % based on the polyurethane foam.Type: ApplicationFiled: February 8, 2013Publication date: January 29, 2015Applicant: EVONIK INDUSTRIES AGInventors: Ruediger Landers, Roland Hubel
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Patent number: 8034848Abstract: The subject matter of the present invention relates to a low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution which can be used in the production of hot-cure flexible polyurethane foams, wherein the low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution comprises the following components: ?40% to ?70% by weight of polyethersiloxane, ?0.5% to ?20% by weight of organic surfactant, ?10% by weight of water, ?0% by weight of organic solvent additions, in which the polyethersiloxane has the following formula (I) —R1—Si(CH3)2O—[Si(CH3)(OSi(CH3)2R0)O—]u—[Si(OSi(CH3)2R0)2O—]v—[Si(CH3)2O—]w—[SiCH3R2O—]x—[SiCH3R3O—]y—[SiCH3R4O]z—[SiR3R4O]t—Si(CH3)2—R5 (I).Type: GrantFiled: August 16, 2007Date of Patent: October 11, 2011Assignee: Evonik Goldschmidt GmbHInventors: Ruediger Landers, Berend-Jan De Gans
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Publication number: 20100294982Abstract: The object of the invention is a method for producing polyurethane and/or polyisocyanurate insulating foam based on foaming reaction mixtures containing polyisocyanates, compounds having reactive hydrogen atoms, propellants, stabilizers, nucleation agents, and optionally further additives, which is characterized in that porous solids, in particular silicates having a zeolite structure, are used as the nucleation agents.Type: ApplicationFiled: December 22, 2008Publication date: November 25, 2010Applicant: Evonik Goldschmidt GmbHInventors: Carsten Schiller, Matthias Naumann, Ruediger Landers, Christian Eilbracht
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Patent number: 7825205Abstract: The invention relates to a process for the preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers having (AB) repeat units, via reaction by methods known per se of polyetherdiols with a stoichiometric excess of ?,?-dihydropolydimethylsiloxanes, in the presence of one or more compounds of elements of main group 13 and/or of transition group 3 as catalyst, which comprises, after completed reaction of the alcohol component, continuing the reaction until no remaining ?Si(H) groups are detectable by a gas-volumetric method, and also to the compounds thus prepared, and to their use as surfactant additives for the production of polyurethane ether foams.Type: GrantFiled: December 14, 2007Date of Patent: November 2, 2010Assignee: Evonik Goldschmidt GmbHInventors: Wilfried Knott, Juergen Droese, Klaus Dieter Klein, Rüdiger Landers, Dagmar Windbiel
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Patent number: 7825209Abstract: The invention relates to a process for the preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers having (AB) repeat units, via reaction of one or more polyetherdiols with a stoichiometric excess of ?,?-dihydropolydimethylsiloxanes and at least one tertiary amine as catalyst, which comprises, after completed reaction of the alcohol component, continuing the reaction in the presence of small amounts of water until no remaining ?Si(H) groups are detectable by a gas-volumetric method.Type: GrantFiled: December 14, 2007Date of Patent: November 2, 2010Assignee: Evonik Goldschmidt GmbHInventors: Wilfried Knott, Klaus-Dieter Klein, Rüdiger Landers, Dagmar Windbiel
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Publication number: 20100240786Abstract: Compatibilizers for mutually immiscible polyol compositions, characterized in that they comprise dispersed particles, and processes for production of these and their use in polyurethane foams.Type: ApplicationFiled: March 17, 2010Publication date: September 23, 2010Applicant: Evonik Goldschmidt GmbHInventors: Martin GLOS, Ruediger Landers, Matthias Naumann, Eva Emmrich
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Process for preparation of SiOC-linked, linear polydimethylsiloxane-polyoxyalkylene block copolymers
Patent number: 7645848Abstract: The invention therefore relates to a process for preparation of SiOC-linked, linear (AB)d polydimethylsiloxane-polyoxyalkylene block copolymers of the general formula [(R2SiO)x(CnH2nO)y]d, in which R are monovalent C1-C18, preferably C1-C4, hydrocarbon radicals, n is a number from 2 to 4, preferably 2 or 3, x ?5, y ?10, d ?3, via reaction of aminosiloxanes having primary amino groups with polyoxyalkylenediols, which comprises concomitant use of one or more tertiary amines as catalyst.Type: GrantFiled: August 21, 2006Date of Patent: January 12, 2010Assignee: Goldschmidt GmbHInventors: Wilfried Knott, Ruediger Landers, Dagmar Windbiel -
Publication number: 20090012197Abstract: The subject matter of the present invention relates to a low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution which can be used in the production of hot-cure flexible polyurethane foams, wherein the low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution comprises the following components: ?40% to ?70% by weight of polyethersiloxane, ?0.5% to ?20% by weight of organic surfactant, ?10% by weight of water, ?0% by weight of organic solvent additions, in which the polyethersiloxane has the following formula (I) —R1—Si(CH3)2O—[Si(CH3)(OSi(CH3)2R0)O—]u—[Si(OSi(CH3)2R0)2O—]v—[Si(CH3)2O—]w—[SiCH3R2O—]x—[SiCH3R3O—]y—[SiCH3R4O]z—[SiR3R4O]t—Si(CH3)2—R5 (I).Type: ApplicationFiled: August 16, 2007Publication date: January 8, 2009Applicant: Goldschmidt GmbHInventors: Ruediger Landers, Berend-Jan De Gans
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PROCESS FOR PREPARATION OF SiOC-LINKED, LINEAR POLYDIMETHYLSILOXANE-POLYOXYALKYLENE BLOCK COPOLYMERS
Publication number: 20070049717Abstract: The invention therefore relates to a process for preparation of SiOC-linked, linear (AB)d polydimethylsiloxane-polyoxyalkylene block copolymers of the general formula [(R2SiO)x(CnH2nO)y]d, in which R are monovalent C1-C18, preferably C1-C4, hydrocarbon radicals, n is a number from 2 to 4, preferably 2 or 3, x ?5, y ?10, d ?3, via reaction of aminosiloxanes having primary amino groups with polyoxyalkylenediols, which comprises concomitant use of one or more tertiary amines as catalyst.Type: ApplicationFiled: August 21, 2006Publication date: March 1, 2007Applicant: Goldschmidt GmbHInventors: Wilfried Knott, Ruediger Landers, Dagmar Windbiel -
Publication number: 20060178443Abstract: The invention relates to a nucleating agent for the production of polyurethane foam comprising nanoparticles, a polyurethane foam comprising nanoparticles, the use of the nucleating agent for producing the polyurethane foam, a method of controlling the cell structure using the nucleating agent, a process for producing the polyurethane foam and a system for carrying out the process comprising separate individual components.Type: ApplicationFiled: January 20, 2006Publication date: August 10, 2006Inventors: Tammo Boinowitz, Ruediger Landers, Hans-Heinrich Schloens
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Patent number: 6942830Abstract: A device and a process for producing three-dimensional objects is disclosed. The device has a container (1) for a medium (2) and a three-dimensionally positionable dispenser (4) for release of a material (3), the addition of which to the medium (2) leads to the formation of solid structures, into the medium (2). Addition of the material (3) by moving the dispenser in XYZ direction on a platform (8) below the filling height of the first material (2) in the container (1) leads to the formation of three-dimensional objects.Type: GrantFiled: December 1, 2000Date of Patent: September 13, 2005Assignee: Envisiontec GmbHInventors: Rolf Mülhaupt, Rüdiger Landers, Hendrik John