Patents by Inventor Harald Grassl

Harald Grassl 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).

  • Publication number: 20240174568
    Abstract: The present application relates to a cementitious composition suitable to be applied to an object via a nozzle. The composition comprises a) 15-90% by weight of a cementitious binder, b) 0.02-3% by weight of an ettringite formation controller, c) 0.15-10% by weight of a magnesium salt accelerator and d) 0.02-2% by weight of a polyhydroxy compound A, and/or salts or esters thereof, wherein the polyhydroxy compound A is selected from polyalcohols with a carbon to oxygen ratio of C/O?1 and mixtures 0 thereof, based on the total dry weight of the composition. Further a process for applying the composition onto a surface and a hardened structure obtained by the process is disclosed.
    Type: Application
    Filed: February 14, 2022
    Publication date: May 30, 2024
    Inventors: Harald GRASSL, Joachim DENGLER, Marita SPIERLING
  • Publication number: 20230303442
    Abstract: The present invention relates to a construction chemical composition, comprising a) at least one inorganic binder, b) less than 0.5 weight-%, based on the total amount of a), b) and c), of at least one compound of the general formula (I) and at least c) one alkali metal carbonate. Further the use of a hydration control mixture as a retarder for at least one inorganic binder, comprising an aluminate-containing binder is disclosed.
    Type: Application
    Filed: June 7, 2021
    Publication date: September 28, 2023
    Inventors: Harald GRASSL, Joachim DENGLER, Julien BIZZOZERO, Alexander SCHOEBEL
  • Patent number: 11377392
    Abstract: The present invention relates to an additive for hydraulically setting compositions comprising a colloidally disperse preparation comprising at least one salt of a polyvalent metal cation with at least one organic phosphonate and/or phosphate compound as anion and at least one polymeric dispersant comprising anionic and/or anionogenic groups and polyether side chains. The additive is especially suitable as slump retainer and for improving early strength.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: July 5, 2022
    Assignee: Construction Research & Technology GmbH
    Inventors: Torben Gädt, Harald Grassl, Luc Nicoleau, Alfons Smeets
  • Publication number: 20220135478
    Abstract: The present application relates to a mixture comprising at least one compound A selected from glyoxylic acid, salts thereof, and condensation or addition products of glyoxylic acid or salts thereof; and at least one polyhydroxy compound B. Furthermore, the present application relates to a construction material composition comprising said mixture, and to the use of said mixture for modifying the hardening of inorganic binder containing building material formulations, and/or for producing building products.
    Type: Application
    Filed: February 14, 2020
    Publication date: May 5, 2022
    Inventors: Harald GRASSL, Joachim DENGLER, Julien BIZZOZERO, Alexander SCHÖBEL
  • Patent number: 11274064
    Abstract: A set control composition for cementitious systems comprises (a) an amine-glyoxylic acid condensate, and (b) at least one of (i) a borate source and (ii) a carbonate source. The carbonate source is selected from inorganic carbonates having an aqueous solubility of 0.1 gL?1 or more, and organic carbonates. The set control composition improves workability of cementitious systems for prolonged periods of time without compromising early compressive strength. Due to the retarding action of the set control composition, the dosage of dispersant(s) necessary to obtain a desired flowability of the cementitious system can be reduced.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: March 15, 2022
    Assignee: Construction Research & Technology GmbH
    Inventors: Harald Grassl, Joachim Dengler, Alexander Schoebel, Gerhard Albrecht, Maxim Pulkin
  • Publication number: 20220002198
    Abstract: A set control composition for cementitious systems comprises (a) an amine-glyoxylic acid condensate, and (b) at least one of (i) a borate source and (ii) a carbonate source. The carbonate source is selected from inorganic carbonates having an aqueous solubility of 0.1 gL?1 or more, and organic carbonates. The set control composition improves workability of cementitious systems for prolonged periods of time without compromising early compressive strength. Due to the retarding action of the set control composition, the dosage of dispersant(s) necessary to obtain a desired flowability of the cementitious system can be reduced.
    Type: Application
    Filed: October 18, 2018
    Publication date: January 6, 2022
    Inventors: Harald GRASSL, Joachim DENGLER, Alexander SCHOEBEL, Gerhard ALBRECHT, Maxim PULKIN
  • Publication number: 20210122676
    Abstract: A set control composition for cementitious systems comprises (a) an amine-glyoxylic acid condensate, and (b) at least one of (i) a borate source and (ii) a carbonate source. The carbonate source is selected from inorganic carbonates having an aqueous solubility of 0.1 gL?1 or more, and organic carbonates. The set control composition improves workability of cementitious systems for prolonged periods of time without compromising early compressive strength. Due to the retarding action of the set control composition, the dosage of dispersant(s) necessary to obtain a desired flowability of the cementitious system can be reduced.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 29, 2021
    Inventors: Harald GRASSL, Joachim DENGLER, Alexander SCHOEBEL, Gerhard ALBRECHT, Maxim PULKIN
  • Patent number: 10927224
    Abstract: The invention relates to a process for modifying polymer particles of an aqueous polymer dispersion in which positively or negatively charged polymer particles are provided with an inorganic salt shell. The inorganic shell leads to an improved drying ability and storage stability of the latex and improves the storage stability of the resulting polymer powder. The obtained polymer powder exhibits an improved viscosity and faster skin-forming time in the final application and is therefore particularly useful in a building material composition.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: February 23, 2021
    Inventors: Gerhard Albrecht, Sophie Putzien, Torben Gaedt, Michael Dietzsch, Harald Grassl, Iris Loescher, Luc Nicoleau
  • Publication number: 20200055784
    Abstract: The present invention relates to an additive for hydraulically setting compositions comprising a colloidally disperse preparation comprising at least one salt of a polyvalent metal cation with at least one organic phosphonate and/or phosphate compound as anion and at least one polymeric dispersant comprising anionic and/or anionogenic groups and polyether side chains. The additive is especially suitable as slump retainer and for improving early strength.
    Type: Application
    Filed: June 27, 2016
    Publication date: February 20, 2020
    Inventors: Torben GÄDT, Harald GRASSL, Luc NICOLEAU, Alfons SMEETS
  • Publication number: 20190071545
    Abstract: The invention relates to a process for modifying polymer particles of an aqueous polymer dispersion in which positively or negatively charged polymer particles are provided with an inorganic salt shell. The inorganic shell leads to an improved drying ability and storage stability of the latex and improves the storage stability of the resulting polymer powder. The obtained polymer powder exhibits an improved viscosity and faster skin-forming time in the final application and is therefore particularly useful in a building material composition.
    Type: Application
    Filed: April 10, 2017
    Publication date: March 7, 2019
    Applicant: BASF SE
    Inventors: Gerhard ALBRECHT, Sophie PUTZIEN, Torben GAEDT, Michael DIETZSCH, Harald GRASSL, Iris LOESCHER, Luc NICOLEAU
  • Patent number: 10131578
    Abstract: The invention relates to a dispersant comprising a polymer obtainable by copolymerization of monomers including 5 to 80 mol % of a hydroxyalkyl acrylate phosphate and/or hydroxyalkylacrylamide phosphate (monomer 1), 0 to 20 mol % of a di(hydroxyalkyl acrylate) phosphate and/or di(hydroxyalkylacrylamide) phosphate (monomer 2) and 1 to 80 mol % of a polyalkylene glycol-containing macromonomer comprising an alkene group (monomer 3). Further disclosed is a process for preparing the polymers of the invention and the use thereof as dispersants in calcium sulphate-containing compositions. A further aspect of the invention is a process for producing shaped gypsum bodies, and also shaped gypsum bodies, more particularly gypsum plasterboards and self-levelling screeds, comprising the dispersant of the invention.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: November 20, 2018
    Assignee: BASF SE
    Inventors: Torben Gaedt, Martin Winklbauer, Harald Grassl, Michael Schinabeck, Nina Susanne Hillesheim, Antonia Grafetstetter
  • Patent number: 9796628
    Abstract: The present invention relates to an additive for hydraulically setting compositions, comprising a colloidally disperse preparation of at least one salt of a mono- or polyvalent metal cation and of at least one compound which is able to release an anion which forms a low-solubility salt with the metal cation, and of at least one polymeric sulphonated dispersant. The additive is suitable particularly as a slump retainer.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: October 24, 2017
    Assignee: Construction Research & Technology, GmbH
    Inventors: Torben Gädt, Harald Grassl, Luc Nicoleau, Joachim Dengler, Martin Winklbauer
  • Patent number: 9777133
    Abstract: The present invention relates to an additive for hydraulically setting compositions, comprising a colloidally disperse preparation of at least one water-soluble salt of a polyvalent metal cation, at least one compound capable of releasing an anion which forms a sparingly soluble salt with the polyvalent metal cation, and at least one polymeric dispersant which comprises anionic and/or anionogenic groups and polyether side chains.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: October 3, 2017
    Assignee: Construction Research & Technology, GmbH
    Inventors: Torben Gädt, Harald Grassl, Alexander Kraus, Luc Nicoleau, Martin Winklbauer
  • Publication number: 20170022108
    Abstract: The invention relates to a composition comprising at least 10 wt. % of a binder based on calcium sulfate and 0.005 to 5 wt. % of an additive made of at least one water-soluble salt of a multivalent metal cation, at least one compound which is capable of releasing an anion that forms a poorly soluble salt together with the multivalent metal cation, and at least one polymer dispersant which comprises anionic and/or anionogenic groups and polyether side chains. The invention further relates to a method for producing said composition and to the use thereof as a calcium sulfate flow screed, a flowable calcium sulfate filler compound, or an earth-moist calcium sulfate screed.
    Type: Application
    Filed: January 9, 2015
    Publication date: January 26, 2017
    Applicant: BASF SE
    Inventors: Torben GAEDT, Harald GRASSL, Martin WINKLBAUER, Oliver MAZANEC
  • Publication number: 20160332914
    Abstract: The present invention relates to an additive for hydraulically setting compositions, comprising a colloidally disperse preparation of at least one salt of a mono- or polyvalent metal cation and of at least one compound which is able to release an anion which forms a low-solubility salt with the metal cation, and of at least one polymeric sulphonated dispersant. The additive is suitable particularly as a slump retainer.
    Type: Application
    Filed: January 20, 2015
    Publication date: November 17, 2016
    Inventors: Torben GÄDT, Harald GRASSL, Luc NICOLEAU, Joachim DENGLER, Martin WINKLBAUER
  • Patent number: 9388077
    Abstract: The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound, said reaction being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticizer for hydraulic binders, wherein the water-soluble comb polymer is present as a copolymer which is produced by free radical polymerization in the presence of a phosphorylated monomer and a (meth)acrylic acid ester based polyether macromonomer.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: July 12, 2016
    Assignee: Construction Research & Technology GmbH
    Inventors: Luc Nicoleau, Torben Gädt, Harald Grassl
  • Publication number: 20160122243
    Abstract: The invention relates to a dispersant comprising a polymer obtainable by copolymerization of monomers including 5 to 80 mol % of a hydroxyalkyl acrylate phosphate and/or hydroxyalkylacrylamide phosphate (monomer 1), 0 to 20 mol % of a di(hydroxyalkyl acrylate) phosphate and/or di(hydroxyalkylacrylamide) phosphate (monomer 2) and 1 to 80 mol % of a polyalkylene glycol-containing macromonomer comprising an alkene group (monomer 3). Further disclosed is a process for preparing the polymers of the invention and the use thereof as dispersants in calcium sulphate-containing compositions. A further aspect of the invention is a process for producing shaped gypsum bodies, and also shaped gypsum bodies, more particularly gypsum plasterboards and self-levelling screeds, comprising the dispersant of the invention.
    Type: Application
    Filed: July 10, 2014
    Publication date: May 5, 2016
    Inventors: Torben Gaedt, Martin Winklbauer, Harald Grassl, Michael Schinabeck, Nina Susanne Hillesheim, Antonia Grafetstetter
  • Patent number: 9315419
    Abstract: The present invention relates to an additive for hydraulically setting compositions, comprising an aqueous, colloidally disperse preparation of at least one salt of a polyvalent metal cation and of at least one polymeric dispersant which comprises anionic and/or anionogenic groups and polyether side chains. The additive is suitable particularly as a slump retainer.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: April 19, 2016
    Assignee: Construction Research & Technology GmbH
    Inventors: Torben Gädt, Harald Grassl, Alexander Kraus
  • Publication number: 20160002435
    Abstract: The present invention relates to an additive for hydraulically setting compositions, comprising a colloidally disperse preparation of at least one water-soluble salt of a polyvalent metal cation, at least one compound capable of releasing an anion which forms a sparingly soluble salt with the polyvalent metal cation, and at least one polymeric dispersant which comprises anionic and/or anionogenic groups and polyether side chains.
    Type: Application
    Filed: February 26, 2014
    Publication date: January 7, 2016
    Inventors: Torben GÄDT, Harald GRASSL, Alexander KRAUS, Luc NICOLEAU, Martin WINKLBAUER
  • Publication number: 20150291474
    Abstract: The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound, said reaction being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticizer for hydraulic binders, wherein the water-soluble comb polymer is present as a copolymer which is produced by free radical polymerization in the presence of a phosphorylated monomer and a (meth)acrylic acid ester based polyether macromonomer.
    Type: Application
    Filed: August 12, 2013
    Publication date: October 15, 2015
    Inventors: Luc Nicoleau, Torben Gadt, Harald Grassl