Patents by Inventor Ulf Velten
Ulf Velten 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: 20230391671Abstract: A method for characterizing sands with regard to adsorption of plasticizing additives includes: providing an aqueous mixture of the plasticizing additive with a defined concentration of the plasticizing additive; determination of a characteristic of the aqueous mixture whereby the characteristic is related to the proportion of the plasticizing additive in the aqueous mixture; contacting a sample of sand to be analyzed with the aqueous mixture or a sample thereof, so that the sand sample is completely immersed in the aqueous mixture or the sample thereof; taking a sample of supernatant liquid from the mixture of step; determination of the same characteristic as in step b) of the sample of supernatant liquid; and comparing the characteristic obtained in step b) with the characteristic of step e) in order to decide whether the characteristics differ from each other by more than a predefined threshold or not.Type: ApplicationFiled: November 30, 2021Publication date: December 7, 2023Applicant: SIKA TECHNOLOGY AGInventors: Anette WEINKAUF, Ulf VELTEN, Lukas FRUNZ, Luis PEGADO, Thomas MÜLLER, Peter MASSHOLDER
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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: 20230087362Abstract: A method includes adding (i) a comb polymer and (ii) a plasticizer to a mineral binder composition comprising swellable clays. The comb polymer includes: at least one poly(alkylene oxide) side chain-bearing monomer unit without ionic groups, optionally at least one cationic monomer unit, optionally at least one anionic monomer unit, and optionally, at least one non-ionic monomer unit, wherein a molar ratio of the cationic monomer units to the side chain-bearing monomer units is equal to or less than 10, a molar ratio of the anionic monomer units to the side chain-bearing monomer units is less than 1, and a molar ratio of the non-ionic monomer units to the side chain-bearing monomer units is less than 5.Type: ApplicationFiled: November 18, 2022Publication date: March 23, 2023Applicant: SIKA TECHNOLOGY AGInventors: Ulf VELTEN, Jürg WEIDMANN, Lukas FRUNZ, Patrick JUILLAND
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Publication number: 20220388904Abstract: Use of a comb polymer as an inerting agent for non-swelling layer-silicates, the comb polymer including: 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 0.1, preferably less than 0.05, 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, and c) 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 7, preferably equal to or less than 3.Type: ApplicationFiled: September 3, 2020Publication date: December 8, 2022Applicant: SIKA TECHNOLOGY AGInventors: Ulf VELTEN, Annette SÜSSENBERGER, Jürg WEIDMANN, Lukas FRUNZ, Patrick JUILLAND
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Publication number: 20220227669Abstract: A curable binder composition includes: a) at least one organic binder selected from the group made of a1) epoxy resins and curing agents for epoxy resins and a2) polyisocyanates and polyols, and b) at least 50% by weight of slag based on 100% by weight of the binder composition.Type: ApplicationFiled: May 28, 2020Publication date: July 21, 2022Applicant: SIKA TECHNOLOGY AGInventors: Steffen KELCH, Tim MAMIE, Thomas MOSER, Ulf VELTEN, Fabio WÜRMLI
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Publication number: 20220033306Abstract: A comb polymer, in particular for use as a clay-inerting agent, including: 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, c) optionally at least one anionic monomer unit MA, d) optionally, at least one non-ionic monomer unit M3, 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, 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, and the molar ratio of the non-ionic monomer units M3 to the side chain-bearing monomer units M1 is less than 5.Type: ApplicationFiled: October 1, 2019Publication date: February 3, 2022Applicant: SIKA TECHNOLOGY AGInventors: Ulf VELTEN, Jürg WEIDMANN, Lukas FRUNZ, Patrick JUILLAND
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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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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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Patent number: 8273814Abstract: The present invention relates to emulsifying polymers, in particular to the use of these polymers for the stable emulsification of hydrophobic additives in aqueous concrete plasticizers.Type: GrantFiled: July 31, 2008Date of Patent: September 25, 2012Assignee: Sika Technology AGInventors: Ueli Sulser, Anna Krapf, Ulf Velten
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Publication number: 20110245379Abstract: A polymer (P) is disclosed which includes amide and ester groups. The polymer can be produced by a process whereby, in a first step, a homo- or co-polymer (P1) of (meth)acrylic acid is reacted with a monohydroxy compound (E) at a temperature of up to 200° C., such that, in addition to ester groups, anhydride groups are formed. In a second step, the anhydride groups formed in the first step are reacted with a monoamine compound (A) at temperatures significantly below 100° C. Polymers produced by the above method can be included in hydraulic-setting compositions before and after hardening by an addition of water.Type: ApplicationFiled: June 14, 2011Publication date: October 6, 2011Applicant: Sika Technology AGInventors: Ueli Sulser, Irene Schober, Ulf Velten, Anna Krapf
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Patent number: 8008374Abstract: A process for preparing a polymer P having amide and ester groups in the solid state of aggregation, comprising (a) reacting a homo- or copolymer P1 of (meth)acrylic acid, itaconic acid or crotonic acid with at least one monohydroxy compound E at a temperature up to 200° C. to give a polymer P2, so that anhydride groups form in addition to ester groups, (b) cooling the polymer P2 prepared in step (a) being cooled to below 60° C. so that the polymer P2 is present in the solid state of aggregation or as supercooled melt, and (c) amidating the polymer P2 having anhydride groups and present in the solid state of aggregation or as supercooled melt with at least one amine compound A at temperatures below 60° C., the amine compound A used in step (c) being present in the solid state of aggregation or on or in a solid carrier material.Type: GrantFiled: October 26, 2007Date of Patent: August 30, 2011Assignee: Sika Technology AGInventors: Ueli Sulser, Anna Krapf, Ulf Velten
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Patent number: 7994259Abstract: The invention relates to a method for the production of a polymer (P) comprising amide and ester groups, whereby, in a first step, a homo- or co-polymer (P1) of (meth)acrylic acid is reacted with a monohydroxy compound (E) at a temperature of up to 200° C., such that, in addition to ester groups, anhydride groups are formed and, in a second step, the anhydride groups formed in the first step are reacted with a monoamine compound (A) at temperatures significantly below 100° C. The invention further relates to polymers produced by the above method, the use thereof in hydraulic-setting compositions and said hydraulic-setting compositions before and after hardening by addition of water.Type: GrantFiled: March 18, 2005Date of Patent: August 9, 2011Assignee: Sika Technology AGInventors: Ueli Sulser, Irene Schober, Ulf Velten, Anna Krapf
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Publication number: 20110178208Abstract: 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: ApplicationFiled: October 29, 2008Publication date: July 21, 2011Applicant: SIKA TECHNOLOGY AGInventors: Christina Hampel, Ulf Velten, Ueli Sulser, Jabbar Al Shemari, Norman Blank
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Publication number: 20100305238Abstract: 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: ApplicationFiled: October 29, 2008Publication date: December 2, 2010Inventors: Christina Hampel, Jabbar Al Shemari, Ulf Velten, Ueli Sulser
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Publication number: 20100197840Abstract: The present invention relates to emulsifying polymers, in particular to the use of these polymers for the stable emulsification of hydrophobic additives in aqueous concrete plasticizers.Type: ApplicationFiled: July 31, 2008Publication date: August 5, 2010Applicant: SIKA TECHNOLOGY AGInventors: Ueli Sulser, Anna Krapf, Ulf Velten
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Publication number: 20100093895Abstract: The present invention relates to a process for the preparation of a polymer P having amide and ester groups in the solid state of aggregation, in a first step (a) a homo- or copolymer P1 of (meth)acrylic acid, itaconic acid or crotonic acid being reacted with at least one monohydroxy compound E at a temperature up to 200° C. to give a polymer P2, so that anhydride groups form in addition to ester groups, in a second step (b) the polymer P2 prepared in step (a) being cooled to below 60° C. so that the polymer P2 is present in the solid state of aggregation or as supercooled melt, and in a third step (c) the polymer P2 having anhydride groups and present in the solid state of aggregation or as supercooled melt being amidated with at least one amine compound A at temperatures below 60° C., the amine compound A used in the third step (c) being present in the solid state of aggregation or on or in a solid carrier material.Type: ApplicationFiled: October 26, 2007Publication date: April 15, 2010Applicant: SIKA TECHNOLOGY AGInventors: Ueli Sulser, Anna Krapf, Ulf Velten
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Publication number: 20080119602Abstract: The invention relates to polymers in a solid state which may be obtained by reaction of at least one polymer, produced from at least one monomer, selected from unsaturated mono- or di-carboxylic acids, or analogues of unsaturated mono- or di-carboxylic acids and optionally at least one ethylenically-unsaturated monomer with at least one polymer which is terminated at one end by terminal groups which are non-reactive under normal reaction conditions and hydroxy- or amino-functionalised at the other end thereof and, optionally, at least one amine.Type: ApplicationFiled: November 2, 2007Publication date: May 22, 2008Applicant: SIKA SCHWEIZ AGInventors: Ueli Sulser, Irene Schober, Urs Mader, Ulf Velten
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Patent number: 7375163Abstract: Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10-10:1, and preferably 1:10-10:1 reduces the drop in fluidity with time of cementitious compositions.Type: GrantFiled: January 11, 2006Date of Patent: May 20, 2008Assignee: Sika Technology AGInventors: Irene Schober, Theodor A. Bürge, Ulf Velten, Jürg Widmer, Christian M. Bürge, Urs Mäder
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Publication number: 20080021169Abstract: The invention relates to a method for the production of a polymer (P) comprising amide and ester groups, whereby, in a first step, a homo- or co-polymer (P1) of (meth)acrylic acid is reacted with a monohydroxy compound (E) at a temperature of up to 200° C., such that, in addition to ester groups, anhydride groups are formed and, in a second step, the anhydride groups formed in the first step are reacted with a monoamine compound (A) at temperatures significantly below 100° C. The invention further relates to polymers produced by the above method, the use thereof in hydraulic-setting compositions and said hydraulic-setting compositions before and after hardening by addition of water.Type: ApplicationFiled: March 18, 2005Publication date: January 24, 2008Inventors: Ueli Sulser, Irene Schober, Ulf Velten, Anna Krapf
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Publication number: 20070032599Abstract: Described are polymers and cement admixtures which reduce drop in fluidity with time. Said admixture comprises at least one polymer of the present invention and at least one polymer A. The polymer of the present invention comprises side chains of which at least 10 weight-% can be cleaved in alkaline medium. The polymer of the present invention is an acrylic polymer which comprises side chains connected to the backbone by ester linkages. These side chains may be alkyl, hydroxy alkyl, cycloalkyl or polyoxyalkylene groups. Polymer A is a cement dispersing agent. The combination of polymer A with the polymer of the present invention in a weight ratio of 0.1:10-10:1, and preferably 1:10-10:1 reduces the drop in fluidity with time of cementitious compositions.Type: ApplicationFiled: January 11, 2006Publication date: February 8, 2007Inventors: Irene Schober, Theodor Burge, Ulf Velten, Jurg Widmer, Christian Burge, Urs Mader