Patents by Inventor Christos Karafilidis
Christos Karafilidis 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: 20240018097Abstract: The present invention relates to a process for preparing a polyisocyanate, namely an isocyanate group-terminated polyol polyanthranilic acid ester. The process comprises the step of reacting an anthranilic acid derivative selected from anthranilic acid halide (in particular anthranilic acid chloride), isatoic anhydride or a mixture thereof with a first polyol of a number-average molar mass of at least 200 g/mol and a functionality in the range of 2 to 8, and obtaining, as a result, a polyamine (namely a polyol polyanthranilic acid ester with amine terminal groups) and reacting the polyamine with phosgene and obtaining, as a result, a polyisocyanate (namely an isocyanate group-terminated polyol polyanthranilic acid ester). The invention further relates to the polyisocyanates obtained in this way, their use in polyaddition reactions, and polyaddition products obtainable by these reactions.Type: ApplicationFiled: December 9, 2021Publication date: January 18, 2024Inventors: Christos Karafilidis, Marina Reithmeier, Stefan Wershofen, Michael Schedler, Michael Baecker
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Publication number: 20230106532Abstract: A cold-stable NCO-containing prepolymer obtainable from the reaction of an isocyanate-reactive component comprising polyether carbonate polyols having an isocyanate component comprising methylene diphenyl diisocyanate (MDI) with high contents of 4,4?-MDI, a method for the preparation thereof, and the use thereof in one- or two-component systems for foams, elastomers, adhesives and sealants provided.Type: ApplicationFiled: March 31, 2021Publication date: April 6, 2023Inventors: Jakob Marbach, Christos Karafilidis, Martin Marazita, Marc Schumacher, Hans-Detlef Arntz
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Patent number: 9410013Abstract: The present invention relates to reactive preparations, comprising isocyanate-functional polyurethane building blocks, to a method for the production thereof, and to the use thereof as or in adhesives having high initial strength and high mechanical strength.Type: GrantFiled: March 27, 2009Date of Patent: August 9, 2016Assignee: Covestro Deutschland AGInventors: Marc Leimenstoll, Sebastian Doerr, Christos Karafilidis, Peter Reichert
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Publication number: 20130059973Abstract: The invention provides polyisocyanate prepolymers, characterised in that they contain polyether carbonate polyols as structural component, their preparation and their use as isocyanate component in 1- and 2-component systems for surface-coating compositions, adhesives and sealing materials.Type: ApplicationFiled: May 2, 2011Publication date: March 7, 2013Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Christian Wamprecht, Christos Karafilidis, Christoph Gürtler, Beate Baumbach
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Publication number: 20120136115Abstract: The invention relates to adhesives, coating agents and sealing agents curing under the influence of moisture, which exhibit good storage stability, can be processed within a wide tolerance range and are fast-curing.Type: ApplicationFiled: July 28, 2010Publication date: May 31, 2012Applicant: Bayer MaterialScience AGInventors: Evelyn Peiffer, Christos Karafilidis, Matthias Wintermantel, Christian Wamprecht
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Publication number: 20120000603Abstract: The invention relates to the use of special isocyanate-terminated polyurethane prepolymers in adhesive formulations. Said adhesive formulations can be used in applications wherein a direct or indirect contact of the adhesive layer takes place with substrates that are sensitive thereto.Type: ApplicationFiled: February 2, 2010Publication date: January 5, 2012Applicant: Bayer Materialscience AGInventors: Christos Karafilidis, Matthias Wintermantel, Heinz-Werner Lucas
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Patent number: 7985479Abstract: Polyisocyanate mixtures, their preparation by reacting aromatic polyisocyanate mixtures and nitrogen-containing polyetherol mixtures, and their use as an isocyanate component for the preparation of moisture-curing adhesives, said polyisocyanate mixtures comprising: (A) 15 to 35 wt. % of diphenylmethane diisocyanate with 2 aromatic rings; (3) 10 to 30 wt. % of polymeric diphenylmethane diisocyanate with 3 or more aromatic rings; and (C) 40 to 75 wt. % of an isocyanate-functional polyurethane; wherein the polyisocyanate mixture has an isocyanate content of 12 to 20 wt. %, an isocyanate functionality of >2.4, a viscosity of <10,000 mPa·s at 25° C., and a shear rate of 80 l/s.Type: GrantFiled: June 20, 2008Date of Patent: July 26, 2011Assignee: Bayer MaterialScience AGInventors: Christian Wamprecht, Christos Karafilidis, Peter Reichert
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Patent number: 7923574Abstract: The invention relates to novel prepolymers which are accessible from the formamides of oligomeric di- or polyamines (formamide-terminated oligomers) and di- or polyisocyanates.Type: GrantFiled: February 23, 2009Date of Patent: April 12, 2011Assignee: Bayer MaterialScience AGInventors: Marc Leimenstoll, Burkhard Köhler, Christos Karafilidis, Matthias Wintermantel
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Publication number: 20110028582Abstract: The present invention relates to reactive preparations, comprising isocyanate-functional polyurethane building blocks, to a method for the production thereof, and to the use thereof as or in adhesives having high initial strength and high mechanical strength.Type: ApplicationFiled: March 27, 2009Publication date: February 3, 2011Applicant: BAYER MATERIALSCIENCE AGInventors: Marc Leimenstoll, Sebastian Doerr, Christos Karafilidis, Peter Reichert
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Publication number: 20110004241Abstract: Methods comprising: providing a migrate-sensitive substrate having a surface to be bonded; providing an adhesive formulation comprising an isocyanate-terminated polyurethane prepolymer containing one or more tertiary amino groups; and forming a migrate-free adhesive bond between the surface of the migrate-sensitive substrate and a second surface; as well as adhesive formulations comprising an isocyanate-terminated polyurethane prepolymer containing one or more tertiary amino groups; and wound closure systems comprising such an adhesive formulation.Type: ApplicationFiled: February 6, 2009Publication date: January 6, 2011Applicant: BAYER MATERIALSCIENCE AGInventors: Matthias Wintermantel, Christos Karafilidis, Heinz-Werner Lucas
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Publication number: 20100330238Abstract: The invention relates to the use of special isocyanate-terminated polyurethane prepolymers in adhesive formulations. Said adhesive formulations can be used in applications in which it is important to prevent or minimize migration of adhesive components when the adhesive layer is in direct or indirect contact with substrates that are sensitive thereto.Type: ApplicationFiled: February 6, 2009Publication date: December 30, 2010Applicant: Bayer MaterialScience AGInventors: Matthias Wintermantel, Christos Karafilidis, Heinz-Werner Lucas, Axel Schmidt
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Publication number: 20100210748Abstract: The present invention relates to reactive polyurethane compositions having only small amounts of free, low molecular weight diisocyanates before and after crosslinking, and to the production thereof and the use thereof in reactive one- and two-component adhesives/sealants, bonding foams, encapsulating compounds and in flexible, rigid and integral foams.Type: ApplicationFiled: January 15, 2010Publication date: August 19, 2010Applicant: Bayer MaterialScience AGInventors: Marc Leimenstoll, Christos Karafilidis, Matthias Wintermantel, Peter Reichert, Lutz Brassat
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Publication number: 20090247721Abstract: The invention relates to novel prepolymers which are accessible from the formamides of oligomeric di- or polyamines (formamide-terminated oligomers) and di- or polyisocyanates.Type: ApplicationFiled: February 23, 2009Publication date: October 1, 2009Applicant: Bayer MaterialScience AGInventors: Marc Leimenstoll, Burkhardt Koehler, Christos Karafilidis, Matthias Wintermantel
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Publication number: 20080318060Abstract: Polyisocyanate mixtures, their preparation by reacting aromatic polyisocyanate mixtures and nitrogen-containing polyetherol mixtures, and their use as an isocyanate component for the preparation of moisture-curing adhesives, said polyisocyanate mixtures comprising: (A) 15 to 35 wt. % of diphenylmethane diisocyanate with 2 aromatic rings; (3) 10 to 30 wt. % of polymeric diphenylmethane diisocyanate with 3 or more aromatic rings; and (C) 40 to 75 wt. % of an isocyanate-functional polyurethane; wherein the polyisocyanate mixture has an isocyanate content of 12 to 20 wt. %, an isocyanate functionality of >2.4, a viscosity of <10,000 mPa·s at 25° C., and a shear rate of 80 l/s.Type: ApplicationFiled: June 20, 2008Publication date: December 25, 2008Applicant: Bayer MaterialScience AGInventors: Christian Wamprecht, Christos Karafilidis, Peter Reichert