Patents by Inventor Jurg Widmer
Jurg Widmer 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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Patent number: 9446986Abstract: A copolymer, in particular a dispersing agent for hydraulically setting systems, includes at least three structural units S1, S2, S3 and optionally a further structural unit S4.Type: GrantFiled: November 8, 2013Date of Patent: September 20, 2016Assignees: SIKA TECHNOLOGY AG, SIKA (CHINA) LTD.Inventors: Michael Danzinger, Jennifer Liu, Ueli Sulser, Jürg Widmer
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Publication number: 20160130182Abstract: A copolymer, in particular a dispersing agent for hydraulically setting systems, includes at least three structural units S1, S2, S3 and optionally a further structural unit S4.Type: ApplicationFiled: November 8, 2013Publication date: May 12, 2016Inventors: Michael DANZINGER, Jennifer LIU, Ueli SULSER, Jürg WIDMER
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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: 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
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Patent number: 7026402Abstract: 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: October 10, 2003Date of Patent: April 11, 2006Assignee: Sika Schweiz AGInventors: Irene Schober, Theodor A. Bürge, Ulf Velten, Jürg Widmer, Christian M. Bürge, Urs Mäder
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Patent number: 6855752Abstract: Polymers for cement dispersing admixtures, which show different performing properties in concrete are described. All polymers are based on a composition of reactants, namely a) a poly(acrylic acid), b) a polyalkyleneglycol-monoalkylether and, optionally c) a ?-amino-polyalkylene-glycol-?-alkylether and/or d) a primary or secondary amine. By keeping the composition of reactants constant and varying only the reaction time, polymers with different properties can easily be achieved. Such polymers are suitable for pre-cast, readymix or for increasing workability over time, just depending on reaction time. Polymers of the invention can be used as single polymer or in polymer blends. For this, the kinetics of the used polymer analogous condensation reaction was intensively studied. Additionally, the benefit of amines as reactant regarding stability and hydrolysis velocity of cleavable side groups was investigated.Type: GrantFiled: March 29, 2001Date of Patent: February 15, 2005Assignee: Sika Schweiz AGInventors: Ulf Velten, Ueli Sulser, Jürg Widmer, Irene Schober, Theodor A. Bürge
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Publication number: 20040127607Abstract: 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: October 10, 2003Publication date: July 1, 2004Applicant: Sika Schweiz AGInventors: Irene Schober, Theodor A. Burge, Ulf Velten, Jurg Widmer, Christian M. Burge, Urs Mader
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Patent number: 6548589Abstract: A multipurpose cement dispersing, shrinkage compensating and anticorrosive polymer and an admixture comprising said polymer, which improve the workability and the early strength development of fresh concrete, are described. Said polymer is an ester- and amid group-modified acrylic polymer, obtainable by aqueous solution radical copolymerization of (1) acrylic or methacrylic acid with (2) an acrylic or methacrylic methoxy-polyalkyleneglycolester monomer having 2 to 300 moles of an oxyalkylene group each having 2 to 3 carbon atoms, (3) optionally an acrylic or methacrylic methoxy-polyalkyleneglycolamide monomer having 2 to 300 moles of an oxyalkylene group each having 2 to 3 carbon atoms, (4) an acrylic or methacrylic ester of a tertiary aminoalkanol and (5) optionally an acrylic amide of a primary or secondary aliphatic, cycloaliphatic or aromatic amine.Type: GrantFiled: March 22, 2001Date of Patent: April 15, 2003Assignee: Sika Schweiz AGInventors: Jürg Widmer, Ueli Sulser, Ulf Velten, Irene Schober, Theodor A. Bürge
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Patent number: 6387176Abstract: A new category of multi-purpose polymers is presented, the polymers being capable to serve as a cement dispersing agent and which at the same time are set-accelerating and do have shrinkage reducing- and anticorrosive properties to steel. The polymers are ester and amide group-modified acrylic polymers, obtainable by a polymer analogous esterification of a polyacrylic acid with 1) a monofunctional polyalkyleneglycol-monoalkylether, 2) a tertiary alkanolamine and optionally 3) by amidation with a amino-polyalkylenglycol alkylether. The multi-purpose polymers serve for cement dispersing admixture for concrete with set accelerating, shrinkage compensating and anticorrosive properties to steel.Type: GrantFiled: April 17, 2000Date of Patent: May 14, 2002Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Jürg Widmer, Ueli Sulser, Theodor A. Bürge, Ulf Velten, Anna Krapf-Huber
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Publication number: 20020007019Abstract: 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: March 22, 2001Publication date: January 17, 2002Inventors: Irene Schober, Theodor A. Burge, Ulf Velten, Jurg Widmer, Christian M. Burge, Urs Mader
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Publication number: 20020002218Abstract: Polymers for cement dispersing admixtures, which show different performing properties in concrete are described.Type: ApplicationFiled: March 29, 2001Publication date: January 3, 2002Inventors: Ulf Velten, Ueli Sulser, Jurg Widmer, Irene Schober, Theodor A. Burge
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Publication number: 20010053804Abstract: A multipurpose cement dispersing, shrinkage compensating and anticorrosive polymer and an admixture comprising said polymer, which improve the workability and the early strength development of fresh concrete, are described.Type: ApplicationFiled: March 22, 2001Publication date: December 20, 2001Inventors: Jurg Widmer, Ueli Sulser, Ulf Velten, Irene Schober, Theodor A. Burge
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Patent number: 5919300Abstract: Cement dispersing agents for self-compacting concrete of high flowability, comprising a water-soluble N-vinyl copolymer, prepared by copolymerizing (a) an N-vinyl-lactame or -amide with (b) a polyethylene glycol ester of maleic acid containing 6 to 240 moles of oxyethylene groups per molecule and (c) at least one monomer selected from among unsaturated dicarboxylic acids and (d) methallylsulfonic acid. When an aqueous solution of this copolymer is used as an admixture to freshly prepared concrete of even extremely low water-to-cement ratio, a high fluidity, a low decrease in flowability with the progression of time and a lack of segregation over time is attained.Type: GrantFiled: October 27, 1997Date of Patent: July 6, 1999Assignee: Sika AG. vorm. Kaspar Winkler & Co.Inventors: Theodor A. Burge, Ueli Sulser, Jurg Widmer, Anna Krapf-Huber
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Patent number: 5100984Abstract: Novel water-soluble linear copolymers of N-vinylamides with monomeric addition products of amines, amino acids, amino groups containing aromatic sulfonic acids, amino alcohols of maleic anhydride as well as maleic esters of polyoxyalkyleneglycols or their monoethers. There is also described the process for the preparation of these copolymers. The copolymers are useful as fluidizers in water containing solid matter suspensions.Type: GrantFiled: May 16, 1990Date of Patent: March 31, 1992Assignee: Sika AG vorm. Kaspar Winkler & Co.Inventors: Theodor A. Burge, Jurg Widmer, Irene Schober, Ueli Sulser
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Patent number: 4748083Abstract: A moisture curable composition contains:(a) one or more episulfide compounds having on the average more than one 1,2-epithiopropyl ether group of the formula I ##STR1## per molecule, and (b) one or more aliphatic N,N'-dialkyl-substituted diketimines of the general formula II ##STR2## wherein A is a divalent aliphatic, cycloaliphatic or arylaliphatic group, andR.sup.1 and R.sup.2 are each an alkyl group, or form together with the C-atom, to which they are bonded, a cycloalkyl group or cycloalkenyl group, and(c) at least one component, selected from the group of the setting accelerators as well as commercially available solvents, reactive diluents, plasticizers, thixotropic aids, fillers and pigments.This composition may be used as lacquers, paints and coatings for steel and concrete.There is also described a process for the preparation of 1,2-epithiopropyl ethers.Type: GrantFiled: January 15, 1987Date of Patent: May 31, 1988Assignee: Sika AG, Vorm. Kaspar Winkler & Co.Inventors: Jurg Widmer, Gerhard Leu, Ueli Sulser
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Patent number: 4504647Abstract: New compounds having one, two or three aldimine groups and one, two or three oxazolidine groups in their molecule are curing agents for organic polyisocyanates. Mixtures of said new compounds with polyisocyanates are stable for long periods if humidity is absent, if they however come into contact with water or the humidity of the environment they rapidly cure resulting in elastic or hard polymers. The new compounds are prepared by reacting a diamine or polyamine with up to 6 amino groups with an epoxy compound, yielding a polyamino alcohol, which is thereafter reacted with an aldehyde, e.g. formaldehyde, an aliphatic, cyclic or heterocyclic or aromatic aldehyde.Type: GrantFiled: May 20, 1981Date of Patent: March 12, 1985Inventors: Lutz D. Zabel, Jurg Widmer, Ueli Sulser
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Patent number: 4501839Abstract: Highly concentrated aqueous solutions of low viscosity of melamine/aldehyde resins are obtained by reacting to a precondensate in a first step melamine and an aldehyde in an alkaline medium and in the presence of water together with at least one compound (I), selected from the group, consisting of an alkali sulfite, an alkaline earth sulfite, an amino sulfonic acid, an amino carboxylic acid, a hydroxycarboxylic acid, a hydroxycarboxylic acid lactone, and a polyhydroxy carboxylic acid lactone, reacting then the thus obtained mixture in a second step with at least one compound (II), selected from the group, consisting of an amino carboxylic acid, a carboxylic acid, a hydroxy carboxylic acid, a hydroxy carboxylic acid lactone, a sulfamic acid, an amino sulfonic acid, a polyhydroxy carboxylic acid and a polyhydroxy carboxylic acid lactone, and then making alkaline the obtained resin solution by adding at least one basic compound (III).Type: GrantFiled: December 14, 1983Date of Patent: February 26, 1985Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Theodor A. Burge, Jurg Widmer, Theodor Meyer, Ulrich Sulser
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Patent number: 4454311Abstract: The invention provides a polycondensation product of(a) sulfamic acid (H.sub.2 N--SO.sub.3 H) and/or at least one N-substituted organic derivative of the sulfamic acid as such or in the form of their salts,(b) formaldehyde and/or glyoxal(c) melamine and/or at least one phenolic compound.This polycondensation product may be used as at least one component in a material for construction.Type: GrantFiled: September 30, 1982Date of Patent: June 12, 1984Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Theodor Burge, Jurg Widmer, Theodor Meyer, Ulrich Sulser
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Patent number: 4430469Abstract: Highly concentrated aqueous solutions of low viscosity of melamine/aldehyde resins are obtained by reacting to a precondensate in a first step melamine and an aldehyde in an alkaline medium and in the presence of water together with at least one compound (I), selected from the group, consisting of an alkali sulfite, an alkaline earth sulfite, an amino sulfonic acid, an amino carboxylic acid, a hydroxycarboxylic acid, a hydroxycarboxylic acid lactone, and a polyhydroxy carboxylic acid lactone, reacting then the thus obtained mixture in a second step with at least one compound (II), selected from the group, consisting of an amino carboxylic acid, a carboxylic acid, a hydroxy carboxylic acid, a hydroxy carboxylic acid lactone, a sulfamic acid, an amino sulfonic acid, a polyhydroxy carboxylic acid and a polyhydroxy carboxylic acid lactone, and then making alkaline the obtained resin solution by adding at least one basic compound (III).Type: GrantFiled: February 24, 1982Date of Patent: February 7, 1984Assignee: Sika AG, vorm. Kaspar Winkler & Co.Inventors: Theodor A. Burge, Jurg Widmer, Theodor Meyer, Ulrich Sulser
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Patent number: 4026875Abstract: A method of manufacturing polyurethane prepolymers containing free, reactive end groups of polyisocyanate and compounds with active H-atoms, while using a tertiary amine as the catalyst, and thereafter deactivating the catalyst by reacting with an alkyl halide.Type: GrantFiled: April 7, 1976Date of Patent: May 31, 1977Assignee: Sika AG, vormals Kaspar Winkler & Co.Inventors: Gerhard Leu, Ueli Sulser, Jurg Widmer, Heinz Goeth