Patents by Inventor Bert Klesczewski
Bert Klesczewski 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: 20160264519Abstract: The present invention relates to a process for preparing polyether polyols by addition of alkylene oxides onto H-functional starter substances, characterized in that at least one urethane alcohol of formula (H) where R1 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R2 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R3 is H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-aralkyl. C2 to C24-alkenyl, C2 to C24-alkynyl, each of which may optionally be interrupted by heteroatoms such as O, S or N and/or each of which may be substituted by alkyl, aryl and/or hydroxyl, is used as H-functional starter compound.Type: ApplicationFiled: November 19, 2014Publication date: September 15, 2016Inventors: Jörg HOFMANN, Kai LAEMMERHOLD, Hartmut NEFZGER, Monika HEINZ, Bert KLESCZEWSKI, Klaus LORENZ
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Publication number: 20160257776Abstract: The present invention relates to a method for producing flexible polyurethane foams, wherein an isocyanate component (component B) is used which comprises polyether carbonate polyol, and to the isocyanate component itself. The invention also provides an NCO-terminated, urethane group-comprising prepolymer obtainable by reaction of one or more polyisocyanates (B1) with one or more polyether carbonate polyols.Type: ApplicationFiled: May 16, 2016Publication date: September 8, 2016Inventors: Gundolf Jacobs, Sven Meyer-Ahrens, Bert klesczewski, Angelika Schultz
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Patent number: 9328196Abstract: The present invention relates to a process for the preparation of polyricinoleic acid ester polyols having primary hydroxyl end groups. It furthermore relates to polyricinoleic acid ester polyols obtainable according to the invention and polyurethane polymers prepared using these polyols. The process comprises the steps: a) polycondensation of ricinoleic acid until a hydroxyl number of >0 mg of KOH/g to <60 mg of KOH/g is reached; and b) reaction of the product obtained in step a) or of a secondary product of the product obtained in step a) comprising carboxyl groups with an epoxide of the general formula (I), wherein R1 represents hydrogen, an alkyl radical or an aryl radical, with the proviso that >80% by weight to <100% by weight, based on the total amount of the epoxide (I) employed, is ethylene oxide and the reaction is carried out in the presence of an amine as the catalyst.Type: GrantFiled: November 18, 2011Date of Patent: May 3, 2016Assignee: Bayer MaterialScience AGInventors: Hartmut Nefzger, Jörg Hofmann, Erika Bauer, Bert Klesczewski, Klaus Lorenz
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Patent number: 9193822Abstract: The invention relates to a process for producing polyester polyols with secondary hydroxyl end groups, including the step of the reaction of a polyester including carboxyl end groups with an epoxide of the general formula (1): wherein R1 stands for an alkyl residue or an aryl residue and the reaction is carried out in the presence of a catalyst that includes at least one nitrogen atom per molecule. The process is distinguished in that the polyester including carboxyl end groups exhibits an acid value from ?25 mg KOH/g to ?400 mg KOH/g and a hydroxyl value from ?5 mg KOH/g and in that the polyester including carboxyl end groups is produced by ?1.03 mol to ?1.90 mol carboxyl groups or carboxyl-group equivalents of an acid component being employed per mol hydroxyl groups of an alcohol. The polyester polyols obtained, including secondary hydroxyl end groups, can be used for the purpose of producing polyurethane polymers.Type: GrantFiled: May 4, 2010Date of Patent: November 24, 2015Assignee: Bayer MaterialScience AGInventors: Hartmut Nefzger, Erika Bauer, Jörg Hofmann, Klaus Lorenz, Bert Klesczewski
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Publication number: 20150299373Abstract: The present invention relates to a process for the production of flexible polyurethane foams, wherein there is used as starting material a polyester polyol component which is composed of at least two dicarboxylic acids.Type: ApplicationFiled: October 23, 2013Publication date: October 22, 2015Applicant: BAYER MATERIALSCIENCE AGInventors: Hartmut NEFZGER, Bert KLESCZEWSKI, Sven MEYER-AHRENS, Harald KNAUP
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Patent number: 9139685Abstract: The invention relates to a process for the preparation of a polyurethane polymer, comprising the step of reaction of A) polyester polyols with secondary hydroxyl end groups, which are obtainable from the reaction of a polyester comprising carboxyl end groups with an epoxide of the general formula (1): wherein R1 represents an alkyl radical or an aryl radical and wherein the polyester comprising carboxyl end groups has an acid number of from ?25 mg of KOH/g to ?400 mg of KOH/g and a hydroxyl number of ?5 mg of KOH/g, with B) polyisocyanates which are chosen from the group comprising toluoylene-diisocyanate, diphenylmethane-diisocyanate, polymeric diphenylmethane-diisocyanate, xylylene-diisocyanate, naphthylene-diisocyanate, hexamethylene-diisocyanate, diisocyanatodicyclohexylmethane and/or isophorone-diisocyanate. The invention furthermore relates to polyurethane polymers prepared by such a process.Type: GrantFiled: June 29, 2010Date of Patent: September 22, 2015Assignee: Bayer MaterialScience AGInventors: Hartmut Nefzger, Jörg Hofmann, Bert Klesczewski, Erika Bauer, Klaus Lorenz
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Publication number: 20150141542Abstract: The present invention provides a method for producing flame-retardant polyurethane foams, the resulting flame-retardant polyurethane foams having particularly low densities.Type: ApplicationFiled: May 17, 2013Publication date: May 21, 2015Applicant: BAYER MATERIALSCIENCE AGInventors: Sven Meyer-Ahrens, Stefan Lindner, Bert Klesczewski
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Publication number: 20140329985Abstract: The present invention provides a process for producing polyether ester polyols on the basis of renewable raw materials, the polyether ester polyols produced by the process according to the invention, the use thereof for the purpose of producing polyurethanes, and also polyurethanes containing the polyether ester polyols according to the inventionType: ApplicationFiled: December 19, 2011Publication date: November 6, 2014Inventors: Klaus Lorenz, Jörg Hofmann, Bert Klesczewski, Norber Hahn
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Patent number: 8715778Abstract: The present invention relates to ballast which have a high stability and a long service life and to a process for the production of ballast. These ballast are suitable for railway track laying and road construction and dike systems used for example in costal protection. These ballast comprise ballast stones and polyurethane foams based on a reaction mixture of selected polyisocyanates and selected compounds with isocyanate-reactive groups.Type: GrantFiled: January 17, 2007Date of Patent: May 6, 2014Assignee: Bayer MaterialScience AGInventors: Andreas Hoffmann, Heinz-Dieter Ebert, Bert Klesczewski
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Publication number: 20140107245Abstract: The invention relates to a method for producing polyether carbonate polyols, wherein (i) in a first step a polyether carbonate polyol is produced from one or more H-functional starter substances, one or more alkylene oxides, and carbon dioxide in the presence of at least one DMC catalyst, and (ii) in a second step the polyether carbonate polyol is chain-extended with a mixture of at least two different alkylene oxides in the presence of at least one DMC catalyst. The invention further relates to polyether carbonate polyols that contain a terminal mixed block of at least two alkylene oxides and to a method for producing soft polyurethane foams, wherein a polyol component containing a polyether carbonate polyol according to the invention is used.Type: ApplicationFiled: May 30, 2012Publication date: April 17, 2014Applicant: Bayer Intellectual Property GmbHInventors: Jörg Hofmann, Bert Klesczewski, Michael Schneider
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Publication number: 20140066535Abstract: The present invention relates to a method for producing flexible polyurethane foams, wherein an isocyanate component (component B) is used which comprises polyether carbonate polyol, and to the isocyanate component itself. The invention also provides an NCO-terminated, urethane group-comprising prepolymer obtainable by reaction of one or more polyisocyanates (B1) with one or more polyether carbonate polyols.Type: ApplicationFiled: March 23, 2012Publication date: March 6, 2014Applicant: Bayer Intellectual Property GmbHInventors: Gundolf Jacobs, Sven Meyer-Ahrens, Bert Klesczewski, Angelika Schulz
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Publication number: 20130345330Abstract: A process for the preparation of polyricinoleic acid esters comprising the step of reaction of ricinoleic acid with an alcohol component which comprises mono- and/or polyfunctional alcohols having a molecular weight of ?32 g/mol to ?40 g/mol, wherein the reaction is carried out at least partly in the presence of a catalyst. The amount of catalyst, based on the total weight of the ricinoleic acid and the alcohol component, is in a range of from ?10 ppm to ?100 ppm. The reaction is ended when the acid number of the reaction product obtained is ?5 mg of KOH/g to ?100 mg of KOH/g. The invention furthermore relates to a polyurethane polymer, in particular a flexible polyurethane foam, which is obtainable using these polyricinoleic acid esters.Type: ApplicationFiled: November 18, 2011Publication date: December 26, 2013Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Hartmut Nefzger, Erika Bauer, Bert Klesczewski, Jüergen Schlossmacher, Sven Meyer-Ahrens, Manfred Schmidt
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Publication number: 20130261205Abstract: The present invention relates to a process for the preparation of polyricinoleic acid ester polyols having primary hydroxyl end groups. It furthermore relates to polyricinoleic acid ester polyols obtainable according to the invention and polyurethane polymers prepared using these polyols. The process comprises the steps: a) polycondensation of ricinoleic acid until a hydroxyl number of >0 mg of KOH/g to <60 mg of KOH/g is reached; and b) reaction of the product obtained in step a) or of a secondary product of the product obtained in step a) comprising carboxyl groups with an epoxide of the general formula (I), wherein R1 represents hydrogen, an alkyl radical or an aryl radical, with the proviso that >80% by weight to <100% by weight, based on the total amount of the epoxide (I) employed, is ethylene oxide and the reaction is carried out in the presence of an amine as the catalyst.Type: ApplicationFiled: November 18, 2011Publication date: October 3, 2013Applicant: Bater Intellectual Property GmbHInventors: Hartmut Nefzger, Jörg Hofmann, Erika Bauer, Bert Klesczewski, Klaus Lorenz
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Publication number: 20130237624Abstract: The present invention relates to a method for producing flexible polyurethane foams, wherein a polyol component which comprises polyricinoleic acid esters is used as starting substance. The flexible polyurethane foams according to the invention have a bulk density according to DIN EN ISO 3386-1-98 in the range of ?10 kg/m3 to ?150 kg/m3, preferably ?20 kg/m3 to ?70 kg/m3, and in general their compressive strength according to DIN EN ISO 3386-1-98 is in the range of ?0.5 kPa to ?20 kPa (at 40% deformation and 4th cycle). The polyricinoleic acid esters are obtainable by the reaction of ricinoleic acid with an alcohol component which comprises mono- and/or polyhydric alcohols with a molecular mass of ?32 g/mol to ?400 g/mol, the reaction being carried out at least in part in the presence of a catalyst.Type: ApplicationFiled: November 18, 2011Publication date: September 12, 2013Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Bert Klesczewski, Gundolf Jacobs, Sven Meyer-Ahrens, Hartmut Nefzger
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Patent number: 8183302Abstract: The present invention relates to polyether polyol compositions containing renewable raw materials, a process for preparing visco-elastic polyurethane foams using such compositions, correspondingly prepared visco-elastic foam materials, and the use thereof.Type: GrantFiled: February 23, 2009Date of Patent: May 22, 2012Assignee: Bayer MaterialScience AGInventors: Bert Klesczewski, Sebastien Triouleyre, Matthäus Gossner, Sven Meyer-Ahrens, Alice Mosbach-Rosenberger
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Publication number: 20120123008Abstract: The invention relates to a process for the preparation of a polyurethane polymer, comprising the step of reaction of A) polyester polyols with secondary hydroxyl end groups, which are obtainable from the reaction of a polyester comprising carboxyl end groups with an epoxide of the general formula (1): wherein R1 represents an alkyl radical or an aryl radical and wherein the polyester comprising carboxyl end groups has an acid number of from ?25 mg of KOH/g to ?400 mg of KOH/g and a hydroxyl number of ?5 mg of KOH/g, with B) polyisocyanates which are chosen from the group comprising toluoylene-diisocyanate, diphenylmethane-diisocyanate, polymeric diphenylmethane-diisocyanate, xylylene-diisocyanate, naphthylene-diisocyanate, hexamethylene-diisocyanate, diisocyanatodicyclohexylmethane and/or isophorone-diisocyanate. The invention furthermore relates to polyurethane polymers prepared by such a process.Type: ApplicationFiled: June 29, 2010Publication date: May 17, 2012Applicant: Bayer MaterialScience AGInventors: Hartmut Nefzger, Jörg Hofmann, Bert Klesczewski, Erika Bauer, Klaus Lorenz
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Publication number: 20120116114Abstract: The invention relates to a process for producing polyester polyols with secondary hydroxyl end groups, including the step of the reaction of a polyester including carboxyl end groups with an epoxide of the general formula (1): wherein R1 stands for an alkyl residue or an aryl residue and the reaction is carried out in the presence of a catalyst that includes at least one nitrogen atom per molecule. The process is distinguished in that the polyester including carboxyl end groups exhibits an acid value from ?25 mg KOH/g to ?400 mg KOH/g and a hydroxyl value from ?5 mg KOH/g and in that the polyester including carboxyl end groups is produced by ?1.03 mol to ?1.90 mol carboxyl groups or carboxyl-group equivalents of an acid component being employed per mol hydroxyl groups of an alcohol. The polyester polyols obtained, including secondary hydroxyl end groups, can be used for the purpose of producing polyurethane polymers.Type: ApplicationFiled: May 4, 2010Publication date: May 10, 2012Applicant: Bayer MaterialScience AGInventors: Hartmut Nefzger, Erika Bauer, Jörg Hofmann, Klaus Lorenz, Bert Klesczewski
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Publication number: 20120108690Abstract: The subject-matter of the present invention relates to a process for the production of flame-retardant polyurethane foams, preferably for the production of flame-retardant flexible polyurethane foams, from A1 a filler-containing polyether polyol (component A1.1), wherein the filler is a reaction product of a di- or poly-isocyanate with a compound containing isocyanate-reactive hydrogen atoms, and optionally further compounds containing isocyanate-reactive hydrogen atoms and having a molecular weight of from 400 to 18,000 (component A1.Type: ApplicationFiled: July 6, 2010Publication date: May 3, 2012Applicant: Bayer MaterialScience AGInventors: Bert Klesczewski, Manduela Otten, Sven Meyer-Ahrens
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Publication number: 20100305228Abstract: The present invention provides a process for the production of polyurethane foams from A1 compounds which contain hydrogen atoms which are reactive towards isocyanates and have a molecular weight of 400-15,000, A2 optionally compounds which contain hydrogen atoms which are reactive towards isocyanates and have a molecular weight of 62-399, A3 water and/or physical blowing agents, A4 optionally auxiliary substances and additives, such as a) catalysts which differ from component A5, b) surface-active additives, c) pigments or flameproofing agents, A5 at least one tin(II) salt of carboxylic acids, the carboxylic acid having from 10 to 16 carbon atoms, and B di- or polyisocyanates, wherein the resulting polyurethane foams have low emission values and a good resistance to ageing.Type: ApplicationFiled: May 21, 2010Publication date: December 2, 2010Applicant: Bayer MaterialScience AGInventors: Matthäus Gossner, Peter Haas, Sven Meyer-Ahrens, Bert Klesczewski
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Publication number: 20090264547Abstract: The present invention relates to polyether polyol compositions containing renewable raw materials, a process for preparing visco-elastic polyurethane foams using such compositions, correspondingly prepared visco-elastic foam materials, and the use thereof.Type: ApplicationFiled: February 23, 2009Publication date: October 22, 2009Applicant: Bayer MaterialScience AGInventors: Bert Klesczewski, Sebastien Triouleyre, Matthaeus Gossner, Sven Meyer-Ahrens, Alice Mosbach-Rosenberger