Patents by Inventor Ralf Fritz
Ralf Fritz 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).
-
Patent number: 11427672Abstract: Disclosed are polyurethane encapsulating compounds for embedding hollow fibers of filter elements, obtainable by mixing a polyol component (A) and an isocyanate component (B), including at least one aromatic isocyanate, to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound. The polyol component (A) includes at least one fatty-acid-based polyol (a1) having a hydroxyl number of greater than 50 to less than 500 mg KOH/g and a functionality of from 2-6, and at least one bismuth catalyst (a2), obtainable by mixing a bismuth carboxylate (a2-1) with an amine compound (a2-11) having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom. The molar ratio of bismuth to amine compound (a2-11) is 1:0.5-1:50. Also disclosed are methods for producing filter elements using the polyurethane encapsulating compounds and to uses of the polyurethane encapsulating compounds for the embedding of hollow fibers.Type: GrantFiled: April 27, 2018Date of Patent: August 30, 2022Assignee: BASF SEInventors: Patrick Bolze, Andre Kamm, Thomas Mathieu, Ralf Fritz, Gunther Lukat
-
Patent number: 11041040Abstract: Polyurethane encapsulating compounds for the embedding of hollow fibers of filter elements are provided. These are obtainable by mixing a polyol component (A) and an isocyanate component (B) to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound, wherein the polyol component (A) comprises (a1) at least one fatty-acid-based polyol, (a2) at least one amine compound having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom and (a3) at least one metal compound that functions as a polyurethane catalyst, wherein the polyurethane catalyst (a3) does not comprise any tin, lead and/or mercury and the isocyanate component (B) comprises at least one aromatic isocyanate having at least two isocyanate groups. Further provided is a method for producing filter elements using the polyurethane encapsulating compounds and the use of the polyurethane encapsulating compounds for the embedding of hollow fibers.Type: GrantFiled: April 27, 2018Date of Patent: June 22, 2021Assignee: BASF SEInventors: Andre Kamm, Thomas Mathieu, Gunther Lukat, Ralf Fritz
-
Publication number: 20210163659Abstract: Disclosed are polyurethane encapsulating compounds for embedding hollow fibers of filter elements, obtainable by mixing a polyol component (A) and an isocyanate component (B), including at least one aromatic isocyanate, to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound. The polyol component (A) includes at least one fatty-acid-based polyol (a1) having a hydroxyl number of greater than 50 to less than 500 mg KOH/g and a functionality of from 2-6, and at least one bismuth catalyst (a2), obtainable by mixing a bismuth carboxylate (a2-1) with an amine compound (a2-11) having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom. The molar ratio of bismuth to amine compound (a2-11) is 1:0.5-1:50. Also disclosed are methods for producing filter elements using the polyurethane encapsulating compounds and to uses of the polyurethane encapsulating compounds for the embedding of hollow fibers.Type: ApplicationFiled: April 27, 2018Publication date: June 3, 2021Inventors: Patrick Bolze, Andre Kamm, Thomas Mathieu, Ralf Fritz, Gunther Lukat
-
Publication number: 20200087437Abstract: Polyurethane encapsulating compounds for the embedding of hollow fibers of filter elements are provided. These are obtainable by mixing a polyol component (A) and an isocyanate component (B) to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound, wherein the polyol component (A) comprises (a1) at least one fatty-acid-based polyol, (a2) at least one amine compound having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom and (a3) at least one metal compound that functions as a polyurethane catalyst, wherein the polyurethane catalyst (a3) does not comprise any tin, lead and/or mercury and the isocyanate component (B) comprises at least one aromatic isocyanate having at least two isocyanate groups. Further provided is a method for producing filter elements using the polyurethane encapsulating compounds and the use of the polyurethane encapsulating compounds for the embedding of hollow fibers.Type: ApplicationFiled: April 27, 2018Publication date: March 19, 2020Inventors: Andre Kamm, Thomas Mathieu, Gunther Lukat, Ralf Fritz
-
Patent number: 9023908Abstract: The present invention relates to a method for adsorbing and/or absorbing oil, by bringing oil into contact with a polyurethane sponge with excellent mechanical properties.Type: GrantFiled: May 24, 2011Date of Patent: May 5, 2015Assignee: BASF SEInventors: Nils Mohmeyer, Ralf Fritz, Bernd Bruchmann, Anna Cristadoro, Marcus Leberfinger, Antje van der Net
-
Patent number: 8802808Abstract: The invention relates to a polyol mixture which comprises as components a1) at least one fat-based polyol, a2) at least one polyetherol having a number average molecular weight of from 500 to 2000 g/mol and a3) if appropriate one or more crosslinkers having a number average molecular weight of from 90 to 400 g/mol, where x) the number average molecular weight of component a1) differs by not more than 400 g/mol from the number average molecular weight of component a2) and xi) components a1) and a2) do not differ from one another in OH functionality by more than 0.5. These polyol mixtures can be employed to produce polyurethane-based embedding compositions. The invention additionally relates to embedding compositions based on the polyol mixtures (A) described at the outset and at least one modified isocyanate (B) and to the use of the embedding compositions as potting material. The invention further relates to a process for producing the embedding compositions as described at the outset.Type: GrantFiled: September 28, 2007Date of Patent: August 12, 2014Assignee: BASF AktiengesellschaftInventors: Hans-Juergen Reese, Ralf Fritz, Gunther Lukat, Hans Ulrich Schmidt
-
Patent number: 8642670Abstract: The present invention relates to an open-cell polyurethane foam comprising polyester and polyether structures and having a density of 70 to 300 g/L, 1 to 20 cells/cm, a rebound intensity greater than 30%, an elongation at break of greater than 200%, a tear propagation resistance of greater than 1.2 N/mm and a tensile strength of greater than 200 kPa. The present invention further relates to a process for producing inventive open-cell polyurethane sponges and to the use thereof as a pipe cleaning sponge.Type: GrantFiled: March 13, 2009Date of Patent: February 4, 2014Assignee: BASF SEInventors: Nils Mohmeyer, Ralf Fritz, Annika Habicht, Daniela Tepe, Frank Prissok, Michael Harms, Bernd Bruchmann, Daniel Schoenfelder, Daniel Freidank, Andreas Emge, Andrea Eisenhardt
-
Patent number: 8592497Abstract: The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).Type: GrantFiled: April 3, 2007Date of Patent: November 26, 2013Assignee: BASF AktiengesellschaftInventors: Hans-Juergen Reese, Imbridt Murrar, Ralf Fritz, Andres Cabrera, Birgit Magg
-
Publication number: 20110293374Abstract: The present invention relates to a method for adsorbing and/or absorbing oil, by bringing oil into contact with a polyurethane sponge with excellent mechanical properties.Type: ApplicationFiled: May 24, 2011Publication date: December 1, 2011Applicant: BASF SEInventors: Nils Mohmeyer, Ralf Fritz, Bernd Bruchmann, Anna Cristadoro, Marcus Leberfinger, Antje van der Net
-
Publication number: 20110021652Abstract: The present invention relates to an open-cell polyurethane foam comprising polyester and polyether structures and having a density of 70 to 300 g/L, 1 to 20 cells/cm, a rebound intensity greater than 30%, an elongation at break of greater than 200%, a tear propagation resistance of greater than 1.2 N/mm and a tensile strength of greater than 200 kPa. The present invention further relates to a process for producing inventive open-cell polyurethane sponges and to the use thereof as a pipe cleaning sponge.Type: ApplicationFiled: March 13, 2009Publication date: January 27, 2011Applicant: BASF SEInventors: Nils Mohmeyer, Ralf Fritz, Annika Habicht, Daniela Tepe, Frank Prissok, Michael Harms, Bernd Bruchmann, Daniel Schoenfelder, Daniel Freidank, Andreas Emge, Andrea Eisenhardt
-
Publication number: 20100105855Abstract: The invention relates to a polyol mixture which comprises as components a1) at least one fat-based polyol, a2) at least one polyetherol having a number average molecular weight of from 500 to 2000 g/mol and a3) if appropriate one or more crosslinkers having a number average molecular weight of from 90 to 400 g/mol, where x) the number average molecular weight of component a1) differs by not more than 400 g/mol from the number average molecular weight of component a2) and xi) components a1) and a2) do not differ from one another in OH functionality by more than 0.5. These polyol mixtures can be employed to produce polyurethane-based embedding compositions. The invention additionally relates to embedding compositions based on the polyol mixtures (A) described at the outset and at least one modified isocyanate (B) and to the use of the embedding compositions as potting material. The invention further relates to a process for producing the embedding compositions as described at the outset.Type: ApplicationFiled: September 28, 2007Publication date: April 29, 2010Applicant: BASF SE,Inventors: Hans-Juergen Reese, Ralf Fritz, Gunther Lukat, Hans Ulrich Schmidt
-
Publication number: 20100076101Abstract: The invention relates to polyphenylenepolymethylene polyisocyanates (B) comprising (B1) the 2-ring product of polyphenylenepolymethylene polyisocyanate (B2) the 3-ring product of polyphenylenepolymethylene polyisocyanate (B3) the 4-ring product of polyphenylenepolymethylene polyisocyanate (B4) the 5-ring product of polyphenylenepolymethylene polyisocyanate, wherein the constituents (B2), (B3) and (B4) are, at a content of (B1) of up to 55% by weight, based on the weight of (B), present in a weight ratio of (B2):(B3):(B4) of 8±4:3.5±1.8:1.2±0.9 and the component (B) comprises at least 85% by weight, based on the weight of the component (B), of the constituents (B1), (B2), (B3) and (B4).Type: ApplicationFiled: November 12, 2007Publication date: March 25, 2010Applicant: BASF SEInventors: Hans-Juergen Reese, Imbridt Murrar, Ralf Fritz, Andres Cabrera, Birgit Magg, Baerbel Guschel
-
Publication number: 20090253819Abstract: The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).Type: ApplicationFiled: April 3, 2007Publication date: October 8, 2009Applicant: BASF SEInventors: Hans-Jürgen Reese, Imbridt Murrar, Ralf Fritz, Andres Cabrera, Birgit Magg
-
Publication number: 20080280120Abstract: The invention relates to moldings which comprise a rigid compact polyurethane or a rigid polyurethane foam having a compact outer skin and a cellular core and contain at least one vacuum insulation panel.Type: ApplicationFiled: September 8, 2004Publication date: November 13, 2008Applicant: BASF AKTIENGESELLSCHAFTInventors: Frank Fechner, Ralf Fritz, Anja Biedermann, Jorg Krogmann
-
Patent number: 6696160Abstract: The invention provides composite components constructed of a layer i) comprising short fiber reinforced PU and having a paintable surface, and a layer ii) comprising long fiber reinforced polyurethane, and also provides a process for producing them, and provides for their use as exterior bodywork parts.Type: GrantFiled: April 10, 2002Date of Patent: February 24, 2004Assignee: BASF AktiengesellschaftInventors: Georg Partusch, Michael Bauer, Michael Fader, Jörg Pöltl, Markus Templin, Ralf Fritz, Jürgen Schneider, Astrid Weidemann
-
Publication number: 20020160204Abstract: The invention provides composite components constructed of a layer i) comprising short fiber reinforced PU and having a paintable surface, and a layer ii) comprising long fiber reinforced polyurethane, and also provides a process for producing them, and provides for their use as exterior bodywork parts.Type: ApplicationFiled: April 10, 2002Publication date: October 31, 2002Inventors: Georg Partusch, Michael Bauer, Michael Fader, Jorg Poltl, Markus Templin, Ralf Fritz, Jurgen Schneider, Astrid Weidemann
-
Patent number: 6063308Abstract: A process for preparing a homogeneous polyol component which is stable to separation and consists of at least one compound of relatively high molecular weight having at least two reactive hydrogen atoms and low-molecular-weight chain extenders and/or crosslinkers and, if desired, of blowing agents, catalysts and other auxiliaries and/or additives comprises the addition to this component of at least one amine and at least one organic and/or modified organic isocyanate; the invention also provides the corresponding polyol component which is stable to separation.The use of this polyol component for preparing PUR, in particular compact or foamed PUR, is also described.Type: GrantFiled: February 17, 1998Date of Patent: May 16, 2000Assignee: BASF AktiengesellschaftInventors: Peter Falke, Regina Hendreich, Ralf Fritz, Inge Rotermund
-
Patent number: 5705709Abstract: The invention relates to a process for the preparation of bromine-containing polyols in which a bromine-containing alcohol is caused to react with an alkylene oxide in admixture with other H-functional compounds and the catalyst used is a system comprising alkaline and Lewis-acid catalysts.Type: GrantFiled: October 27, 1995Date of Patent: January 6, 1998Assignee: BASF Schwarzheide GmbHInventors: Bernd Guettes, Regina Pretzsch, Ralf Fritz