Patents by Inventor Christina Hampel
Christina Hampel 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: 20230303444Abstract: A comb polymer is used as an inerting agent for swelling clays and/or non-swelling clays in gypsum compositions, the comb polymer includes: a) at least one poly(alkylene oxide) side chain-bearing monomer unit M1 without ionic groups, b) optionally at least one cationic monomer unit MC, wherein the molar ratio of the cationic monomer units MC to the side chain-bearing monomer units M1 is equal to or less than 10, c) optionally at least one anionic monomer unit MA, wherein the molar ratio of the anionic monomer units MA to the side chain-bearing monomer units M1 is less than 1, preferably equal to or less than 0.5, d) optionally, at least one non-ionic monomer unit M3, wherein the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 5.Type: ApplicationFiled: July 12, 2021Publication date: September 28, 2023Applicant: SIKA TECHNOLOGY AGInventors: Ulf VELTEN, Annette WEINKAUF, Christina HAMPEL, Jürg WEIDMANN, Lukas FRUNZ, Patrick JUILLAND
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Publication number: 20230022017Abstract: A process for preparing powdered dispersants comprising at least 90% by weight of at least one copolymer CP of the polycarboxylate ether type. The powdered dispersants can be easily dispersed in water. The invention also relates to the use of such powdered dispersants in mineral binder compositions, in particular dry mortars, concrete or gypsum formulations.Type: ApplicationFiled: January 19, 2021Publication date: January 26, 2023Applicant: SIKA TECHNOLOGY AGInventors: Denise MUTHS-KERN, Rasid SAHINAGIC, Christina HAMPEL, Jörg ZIMMERMANN, Nicole JAGIELSKI
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Patent number: 10988415Abstract: The present invention relates to the use of a copolymer as a dispersant for binder compositions based on calcium sulfate, the copolymer having a polymer backbone and sidechains bound thereto, and at least one ionizable monomeric unit M1 and at least one sidechain-carrying monomeric unit M2, characterized in that the copolymer has, in a direction along the polymer backbone, a non-random distribution of the monomeric units M1 and/or of the monomeric units M2.Type: GrantFiled: September 22, 2016Date of Patent: April 27, 2021Assignee: SIKA TECHNOLOGY AGInventors: Jürg Weidmann, Christina Hampel, Jörg Zimmermann
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Publication number: 20210024415Abstract: A method for producing improved comb polymers having a block or gradient structure. The comb polymers are highly suitable for dispersing fine powder.Type: ApplicationFiled: May 22, 2019Publication date: January 28, 2021Applicant: SIKA TECHNOLOGY AGInventors: Jürg WEIDMANN, Markus FRIEDERICH, Christina HAMPEL, Jörg ZIMMERMANN
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Publication number: 20200223754Abstract: A copolymer, in particular a dispersant for hydraulically setting binder compositions, including a specific dicarboxylic acid based subunit and a specific polyalkylene glycol based subunit wherein the molar ratio of the dicarboxylic acid based subunit to the polyalkylene glycol based subunit is from 1.5-4.Type: ApplicationFiled: July 27, 2017Publication date: July 16, 2020Applicant: SIKA TECHNOLOGY AGInventors: Yalei CHEN, Christina HAMPEL, Jianghong LIU, Joerg ZIMMERMANN
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Publication number: 20190300431Abstract: The present invention relates to the use of a copolymer as a dispersant for binder compositions based on calcium sulfate, the copolymer having a polymer backbone and sidechains bound thereto, and at least one ionizable monomeric unit M1 and at least one sidechain-carrying monomeric unit M2, characterized in that the copolymer has, in a direction along the polymer backbone, a non-random distribution of the monomeric units M1 and/or of the monomeric units M2.Type: ApplicationFiled: September 22, 2016Publication date: October 3, 2019Applicant: Sika Technology AGInventors: Jürg WEIDMANN, Christina HAMPEL, Jörg ZIMMERMANN
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Patent number: 10040722Abstract: A comb polymer and use thereof for improving the processing of hydraulically setting compositions. The comb polymer has ester, amide and/or ether groups on side chains bound to a main chain and the main chain has at least one acrylic acid unit A or a salt thereof and at least one methacrylic acid unit M or a salt thereof. Processes for producing a hydraulically setting composition with longer processing time.Type: GrantFiled: September 21, 2012Date of Patent: August 7, 2018Assignee: SIKA TECHNOLOGY AGInventors: Ueli Sulser, Christina Hampel, Jörg Zimmermann
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Patent number: 9758608Abstract: The invention relates to the use of at least one comb polymer which includes side chains which have at least one cationic group, and does not include side chains having polyether groups, and which has a main chain which has carboxyl groups, as dispersant for hydraulically settable compositions. The invention also relates to hydraulically settable cement compositions, moldings, comb polymers and method for producing comb polymers.Type: GrantFiled: October 23, 2013Date of Patent: September 12, 2017Assignee: SIKA TECHNOLOGY AGInventors: Christina Hampel, Jörg Zimmermann, Jabbar Alshemari, Markus Friederich
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Patent number: 9266779Abstract: Additives selected from primary, secondary, and tertiary alkyl amines and quaternary alkyl ammonium compounds are added to argillaceous gypsum compositions comprising comb polymers to improve the workability thereof. Argillaceous gypsum compositions, dispersing agents, a method for producing argillaceous gypsum compositions, and molded parts that can be produced from the gypsum compositions are also described.Type: GrantFiled: December 14, 2010Date of Patent: February 23, 2016Assignee: SIKA TECHNOLOGIES AGInventors: Christina Hampel, Jabbar Ai Shemari, Jorg Zimmermann, Robert Flatt
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Publication number: 20160017082Abstract: Provided are cationic comb polymers, obtainable by polymerizing a monomer mixture, which contains at least one monomer having at least one cationic group covalently bonded to the monomer and which contains at least one monomer of the formula R1—O-[AO]n—R2, wherein R1 is an alkenyl group, R2 represents H, an alkyl group having 1 to 20 C atoms, or an aryl group or alkylaryl group having 7 to 20 C atoms, A independently of one another represents a C2 to C6 alkylene group, and n is a value from 2 to 300. Also provided are hydraulically setting cement compositions, shaped bodies, uses, and methods for producing comb polymers. Also provided are novel comb polymers with cationic side chains and structural subunits that comprise polyether components. Further provided are hydraulically setting cement compositions, shaped bodies, uses and methods for producing comb polymers.Type: ApplicationFiled: December 16, 2013Publication date: January 21, 2016Applicant: SIKA TECHNOLOGY AGInventors: Christina HAMPEL, Jörg ZIMMERMANN, Jabbar AL SHEMARI, Markus FRIEDERICH
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Publication number: 20150232597Abstract: The invention relates to the use of at least one comb polymer which includes side chains which have at least one cationic group, and does not include side chains having polyether groups, and which has a main chain which has carboxyl groups, as dispersant for hydraulically settable compositions. The invention also relates to hydraulically settable cement compositions, mouldings, comb polymers and method for producing comb polymers.Type: ApplicationFiled: October 23, 2013Publication date: August 20, 2015Inventors: Christina Hampel, Jörg Zimmermann, Jabbar Alshemari, Markus Friederich
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Publication number: 20150166691Abstract: The invention relates to a method for producing an additive for a hydraulically setting composition, comprising the following steps: (a) providing an aqueous solution containing at least one comb polymer, and (b) cleaving side chains of the comb polymers. The invention also relates to additives for the hydraulically setting compositions, to uses, selection methods and kits.Type: ApplicationFiled: June 5, 2013Publication date: June 18, 2015Inventors: Robert Flatt, Christina Hampel, Lukas Frunz
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Publication number: 20140366780Abstract: A setting retarder for hydrate-forming binders is produced by reacting a first reactant A, including an amino acid and/or an amino acid derivative, with a second reactant C, including an amine-free carboxylic acid and/or an amine-free carboxylic acid derivative, in a reaction mixture to form a reaction product, the reaction mixture further containing at least one base, and alternatingly adding partial quantities of the at least one base and partial quantities of the second reactant C to the reaction mixture so that the reaction is carried out at a pH value in a range of from 7.5-11.5, wherein the setting retarder is in liquid or solid form.Type: ApplicationFiled: September 3, 2014Publication date: December 18, 2014Applicant: SIKA TECHNOLOGY AGInventors: Christina HAMPEL, Joerg ZIMMERMANN
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Patent number: 8853305Abstract: A method for producing a setting retarder for hydrate-forming binders, wherein a) a first reactant A, comprising an amino acid and/or an amino acid derivative, is reacted with b) a second reactant C, including an amine-free carboxylic acid and/or an amine-free carboxylic acid derivative, to form a reaction product, characterized in that the reaction is carried out at a pH value of 7.5-11.5 and the pH value is held constant in the specified range of 7.5-11.5 during the reaction. In order to hold the pH value constant in the specified range and to avoid fluctuations, in one process step an aqueous solution of reactant A is prepared and a pH of 7.5-11.5, preferably 8-11, in particular 8.5-10.5, is set by adding a base.Type: GrantFiled: March 8, 2012Date of Patent: October 7, 2014Assignee: Sika Technology AGInventors: Christina Hampel, Joerg Zimmermann
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Patent number: 8653161Abstract: Polymers P as dispersants, in particular as liquefiers, for hydraulically setting systems, and hydraulically setting systems including the polymer P. The polymer P includes at least one acid unit, at least one ester unit, and at least one unit containing terephthalate or naphthalate.Type: GrantFiled: October 29, 2008Date of Patent: February 18, 2014Assignee: Sika Technology AGInventors: Christina Hampel, Ulf Velten, Ueli Sulser, Jabbar Al Shemari, Norman Blank
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Publication number: 20130289169Abstract: A method for producing a setting retarder for hydrate-forming binders, wherein a) a first reactant A, comprising an amino acid and/or an amino acid derivative, is reacted with b) a second reactant C, including an amine-free carboxylic acid and/or an amine-free carboxylic acid derivative, to form a reaction product, characterized in that the reaction is carried out at a pH value of 7.5-11.5 and the pH value is held constant in the specified range of 7.5-11.5 during the reaction. In order to hold the pH value constant in the specified range and to avoid fluctuations, in one process step an aqueous solution of reactant A is prepared and a pH of 7.5-11.5, preferably 8-11, in particular 8.5-10.5, is set by adding a base.Type: ApplicationFiled: March 8, 2012Publication date: October 31, 2013Applicant: SIKA TECHNOLOGY AGInventors: Christina Hampel, Joerg Zimmermann
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Patent number: 8466244Abstract: The present invention relates to polymers P as dispersants, in particular as liquefiers, for hydraulically setting systems, and hydraulically setting systems comprising the polymer P. The polymer P comprises at least one acid unit, at least one ester unit, at least one unit containing a tetrahydrofurfuryl group, and optionally at least one amide unit.Type: GrantFiled: October 29, 2008Date of Patent: June 18, 2013Assignee: Sika Technology AGInventors: Christina Hampel, Jabbar Al Shemari, Ulf Velten, Ueli Sulser
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Publication number: 20130030087Abstract: A comb polymer and use thereof for improving the processing of hydraulically setting compositions. The comb polymer has ester, amide and/or ether groups on side chains bound to a main chain and the main chain has at least one acrylic acid unit A or a salt thereof and at least one methacrylic acid unit M or a salt thereof. Processes for producing a hydraulically setting composition with longer processing time.Type: ApplicationFiled: September 21, 2012Publication date: January 31, 2013Applicant: Sika Technology AGInventors: Ueli SULSER, Christina Hampel, Jörg Zimmermann
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Publication number: 20120264851Abstract: Additives selected from primary, secondary, and tertiary alkyl amines and quaternary alkyl ammonium compounds are added to argillaceous gypsum compositions comprising comb polymers to improve the workability thereof. Argillaceous gypsum compositions, dispersing agents, a method for producing argillaceous gypsum compositions, and molded parts that can be produced from the gypsum compositions are also described.Type: ApplicationFiled: December 14, 2010Publication date: October 18, 2012Applicant: SIKA TECHNOLOGY AGInventors: Christina Hampel, Jabbar Ai Shemari, Jorg Zimmermann, Robert Flatt
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Patent number: 8273808Abstract: A polymer P as a dispersant for gypsum compositions, as well as gypsum compositions including the polymer P. The polymer P includes at least one acid unit and at least one long side chain with a molecular weight of at least 1800 g/mol, including polyoxyalkylene groups, and has an acid content of 1.5 to 4 acid groups per gram of polymer.Type: GrantFiled: July 30, 2009Date of Patent: September 25, 2012Assignee: Sika Technology AGInventors: Christina Hampel, Ueli Sulser, Jabbar Al Shemari, Jorg Zimmermann