Organic Nitrogen Compound Patents (Class 106/727)
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Patent number: 11603488Abstract: The present invention relates to a process for preparing a metal-chelate retarder by a sol-gel method. The method comprises the following steps: weighing calcium nitrate tetrahydrate, aluminum nitrate nonahydrate and ferric nitrate nonahydrate according to a certain mass ratio and adding them into deionized water; placing the mixed solution on a magnetic stirrer and stirring the mixed solution evenly; adding citric acid monohydrate or gluconic acid, ethylene glycol or glycerol, and placing the mixed solution into a water bath to react to obtain the metal-chelate retarder. The process of the present invention has a reliable principle, overcomes the defects of long production period, complex preparation and the like of the existing retarders, has the advantages of simple process operation, cheap and easily available raw materials, and short production period.Type: GrantFiled: July 22, 2020Date of Patent: March 14, 2023Assignees: SOUTHWEST PETROLEUM UNIVERSITY, CNPC BOHAI DRILLING ENGINEERING COMPANY LIMITEDInventors: Xiaowei Cheng, Shuxun Zhao, Yang Yu, Zhihui Lin, Gaoyin Zhang, Chaoming Wu, Kaiqiang Liu, Wenming Liu, Zuwei Chen, Jiawen Fu, Tianpeng Zuo, Ben Qi, Chunmei Zhang, Zaoyuan Li, Sheng Huang, Xiaoyang Guo
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Patent number: 11560337Abstract: A method for preventing formation of rust-colored stains on the surface of a hydraulic composition includes mixing the hydraulic composition with an additive for hydraulic binder including at least a dialkanolamine including from 2 to 8 carbon atoms, and at least a polyol preferably chosen from a diol, a triol, a tetraol and mixtures thereof. Other uses include a grinding aid for hydraulic binder precursor, and/or improving the compressive strength of a set hydraulic composition.Type: GrantFiled: July 30, 2018Date of Patent: January 24, 2023Assignee: CHRYSOInventors: Bruce Gambrell, Brian D Breitzman
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Patent number: 11511478Abstract: A method for producing a shaped body from a curable material, in particular from a mineral binder composition, wherein the curable material is applied layer by layer in an additive method, in particular in an additive free-space method, by a printing head that can be moved in at least one spatial direction and wherein an application rate of the curable material and the temporal development of strength of the curable material are coordinated with each other.Type: GrantFiled: December 20, 2017Date of Patent: November 29, 2022Assignee: SIKA TECHNOLOGY AGInventors: Didier Lootens, Armin Brühwiler, Raphael Bourquin
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Patent number: 10752546Abstract: An adjuvant combination composed of a milling assistant and a concrete admixture for a composition including cement, for accelerating cement hydration, wherein the milling assistant includes at least one amino alcohol and at least one cement hydration accelerator selected from chlorides, thiocyanates, nitrates, nitrites and hydroxides, and the concrete admixture includes a reaction product of at least one calcium compound with at least one silicon compound selected from a silicon dioxide compound, a silica compound and a silicate compound. Using the adjuvant combination produces a significant acceleration in the hardening of a composition including cement, after the addition of water. This is an advantage especially in the production of prefabricated concrete components, allowing quicker deshuttering.Type: GrantFiled: July 9, 2014Date of Patent: August 25, 2020Assignee: SIKA TECHNOLOGY AGInventors: Thomas Müller, Christian Bürge, Beat Marazzani, Christophe Kurz
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Patent number: 9909051Abstract: Disclosed herein are cement compositions and methods of using set-delayed cement compositions in subterranean formations. A method of cementing in a subterranean formation, may comprise providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder, activating the set-delayed cement composition with a cement set activator, wherein the cement set activator comprises at least one activator selected from the group consisting of nanosilica, a polyphosphate, and combinations thereof, introducing the set-delayed cement composition into a subterranean formation, and allowing the set-delayed cement composition to set in the subterranean formation.Type: GrantFiled: November 24, 2015Date of Patent: March 6, 2018Assignee: Halliburton Energy Services, Inc.Inventors: Thomas J. Pisklak, Kyriacos Agapiou, Pauline A. Otieno, Ronnie G. Morgan, Peter J. Boul, Lance E. Brothers
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Patent number: 9771772Abstract: Methods may comprise providing a cement dry blend comprising a plurality of cement particles and a plurality of inert microparticles, wherein the inert microparticles have an average diameter at least about 3 times smaller than that of the average diameter of the cement particles; mixing water, a set retarding additive, and the cement dry blend to yield a cement slurry; storing the cement slurry; mixing a cement set accelerator into the cement slurry; introducing the cement slurry into a wellbore penetrating a subterranean formation; and allowing the cement slurry to set at a location within the wellbore, the subterranean formation, or both.Type: GrantFiled: September 20, 2013Date of Patent: September 26, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Lance E. Brothers, Ronnie Glen Morgan, Pauline Akinyi Otieno, Peter James Boul, Kyriacos Agapiou, Thomas J. Pisklak
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Patent number: 9611176Abstract: The invention relates to a setting accelerator for a dry mortar blend, the setting accelerator being in the form of a powder comprising calcium nitrate and having a water content between 0.1% and 20%. The invention furthermore relates to a process for producing such a setting accelerator, wherein either prills and/or granules comprising calcium nitrate and a different nitrate salt are processed forming a powder comprising calcium nitrate and the different nitrate salt and having a water content of higher than 5% and lower than 20%, either an aqueous solution at least comprising dissolved calcium nitrate is spray dried at a temperature between 150° C. and 250° C., forming a powder comprising at least calcium nitrate and having a water content between 0.1% and 20%, the powder serving as the setting accelerator.Type: GrantFiled: November 4, 2014Date of Patent: April 4, 2017Assignee: YARA INTERNATIONAL ASAInventors: Wolfram Franke, Anne Mette Langholm, Hilde Brekke Dahl Thommesen, Bjørn Helge Engesveen
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Patent number: 9540287Abstract: Disclosed are cementitious product, as well as cementitious slurry, and method of forming the product. To reduce density in the cementitious product, foam is included in the slurry and in the method of forming the product. The slurry includes cementitious particles, water, and air bubbles such as from compressed air. Instead of using detergent chemistry at the gas/water interface of bubbles, the present invention uses a surface modifying agent for the cementitious particles in the slurry. The modified particles act to produce stable foam in the slurry. As an example mode of introduction, the surface modifier can be added (e.g., as solid or solution) directly into a bulk cementitious slurry that forms the product. As another example, the surface modifier can be added in a separate solution with water, air bubbles, and cementitious particles that serve as additive to the main cementitious slurry, where the separate solution is then added to the main cementitious slurry.Type: GrantFiled: September 18, 2013Date of Patent: January 10, 2017Assignee: United States Gypsum CompanyInventors: Naser Aldabaibeh, Kumar Natesaiyer, Ashish Dubey
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Patent number: 9499731Abstract: Methods and compositions are provided that related to cementing operations. Methods and compositions that include pumice and/or perlite as a replacement for fly ash.Type: GrantFiled: December 29, 2014Date of Patent: November 22, 2016Assignee: Halliburton Energy Services, Inc.Inventors: Jeffery D. Karcher, D. Chad Brenneis, Lance E. Brothers
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Patent number: 9233876Abstract: A hardening accelerator for mineral binder compositions, in particular for cementitious binder compositions, is provided. The hardening accelerator contains a combination of a) a first amino alcohol (A) including at least one primary alcohol group, and b) a second amino alcohol (E) including at least one secondary alcohol group.Type: GrantFiled: November 26, 2013Date of Patent: January 12, 2016Assignee: SIKA TECHNOLOGY AGInventors: Beat Marazzani, Christian Bürge, Christophe Kurz, Gilbert Mäder
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Patent number: 9028609Abstract: An additive composition including a grinding aid selected from glycols, monocarboxylic acids with 1 to 4 carbon atoms, and comb polymers; as well as at least one retardant, which can be used during the process of grinding cement clinker and which leads to low brown discoloration of the ground cement in the processed state.Type: GrantFiled: June 8, 2012Date of Patent: May 12, 2015Assignee: Sika Technology AGInventors: Dieter Honert, Thomas Heller
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Patent number: 9023151Abstract: The present invention is mainly aimed at a set-accelerating admixture for hydraulic compositions comprising, in an aqueous solution, the reaction product of an alkanolamine with a concentrated strong acid; sulfate anions; and alkali or alkaline earth cations; having a pH comprised between 5 and 12. Moreover it is directed to a method for its preparation as well as to a method for preparing hydraulic compositions comprising the step for adding such an admixture to the hydraulic binder, before, during or after the grinding.Type: GrantFiled: February 6, 2013Date of Patent: May 5, 2015Assignee: ChrysoInventors: Bruno Pellerin, David Babayan, Frédéric Rudolph
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Publication number: 20150114266Abstract: The invention relates to a method for producing a hydraulic binder, comprising contacting a composition comprising cement clinker, before, during or after the grinding procedure, with (a) a defoaming agent and (b) 0.0005% to 2% by weight, based on the total composition, of at least one air-introducing compound, the defoaming agent (a) comprising 0.0001% to 0.5% by weight, based on the total composition, of at least one defoaming agent of the formula R10—(CmH2m—O—)x—(CdH2d—O—)c—H and the ratio of (a) to (b) being between 1:1 to 1:200.Type: ApplicationFiled: April 22, 2013Publication date: April 30, 2015Inventors: Mario Vierle, Martin Ernst, Madalina Andreea Stefan
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Patent number: 8992680Abstract: A fast hydraulic binder comprising cement, at least one first superplasticizer, a calcium salt, and at least one second superplasticizer different from the first superplasticizer and comprising a main chain and pendant groups connected to the main chain adapted so as to separate from the main chain in a basic medium, wherein the result is that the second plasticizer has a fluidifying action which increases at least temporarily over time in a basic medium.Type: GrantFiled: August 17, 2011Date of Patent: March 31, 2015Assignee: LAFARGEInventors: Serge Sabio, David Rinaldi, Jean-Michel Laye, Isabelle Sgro, Horacio Naranjo, Bruno Pellerin, Pascal Boustingorry
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Patent number: 8986445Abstract: The invention is directed to a construction material and to the use of modified layered inorganic material. The construction material of the invention comprises a layered inorganic material, which layered inorganic material comprises an ionic organic modifier compound and a biocide. The construction material of the invention has increased resistance against microbial fouling.Type: GrantFiled: June 4, 2010Date of Patent: March 24, 2015Assignee: Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek TNOInventors: Jacobus Eversdijk, Karin Tempelaars, Rudolf Hartmut Fischer
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Patent number: 8961672Abstract: Solid alkali metal salts of organosilanols and/or their hydrolysis/condensation products are prepared by hydrolysis of organosilanes in water and in the presence of a basic alkali metal salt. The products contain predominately methyl and ethyl organic groups, and C4 or higher hydrocarbon groups as well. The solid salts effectively hydrophobe building materials, while being easily mixed with water.Type: GrantFiled: May 7, 2012Date of Patent: February 24, 2015Assignee: Wacker Chemie AGInventors: Michael Stepp, Dominik Auer, Karl-Heinz Felix, Daniel Schildbach
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Patent number: 8950928Abstract: A slurry quick-setting admixture comprising an alkaline earth metal carbonate, a water-soluble acidic substance, calcium aluminate, an alkali metal sulfate, and water; and a quick-setting cement concrete comprising such a slurry quick-setting admixture and cement concrete. The slurry quick-setting admixture may further contain calcium sulfate, calcium hydroxide and/or aluminum hydroxide, a retarder, etc. The spraying method comprises mixing water and a powder quick-setting admixture comprising an alkaline earth metal carbonate, a water-soluble acidic substance, calcium aluminate and an alkali metal sulfate, to form a slurry quick-setting admixture, mixing this slurry quick-setting admixture with cement concrete to form a quick-setting cement concrete, and spraying this quick-setting cement concrete.Type: GrantFiled: November 7, 2007Date of Patent: February 10, 2015Assignee: Danki Kagaku Kogyo Kabushiki KaishaInventors: Yasuhiro Nakashima, Youhei Yamagishi, Shunichi Mishima, Isao Terashima
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Patent number: 8911550Abstract: The use of hydrolysates of glutamine-rich proteins for use as air entraining agents in building material compounds.Type: GrantFiled: April 2, 2013Date of Patent: December 16, 2014Assignee: Evonik Industries AGInventors: Martin Schilling, Christoph Toelle, Ralph Scheuermann, Sabine Giessler-Blank, Jörn Heiβing
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Patent number: 8871021Abstract: Concrete mixtures for use with air entraining agents and supplementary cementitious materials are achieved using a carbon encapsulating agent. The carbon encapsulating agent can include a nitrilotrisethanol aliphatic soap.Type: GrantFiled: March 8, 2012Date of Patent: October 28, 2014Assignee: Staker & Parson CompaniesInventor: Lonnie James Gray
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Patent number: 8864905Abstract: The present invention belongs to the field of binder compositions for construction, more specifically it relates to the use of carboxymethylchitosan as flocculating additive and setting accelerator in binder compositions of the cement, cement mortar, concrete, grout, stucco and similar type. The invention also relates to binder compositions comprising carboxymethylchitosan, as well as to the method for their preparation.Type: GrantFiled: September 28, 2011Date of Patent: October 21, 2014Assignee: Universidad De NavarraInventors: Jose Ignacio Alvarez Galindo, Jose Maria Fernandez, Maria Lasheras Zubiate, Inigo Navarro Blasco
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Patent number: 8821630Abstract: The invention relates to compositions and methods for modifying cementitious materials such as by reducing setting time. Polymer compositions of the invention are derived by polyetherifying mono-glycerols, optionally with alkylene glycols, to obtain polyglycerol homopolymers or copolymers, and then carboxylating the obtained polyglycerol homopolymers and/or copolymers with an organic acid having at least two carboxylic functionalities. The set retardation effect of the carboxylated-carboxylic polyglycerol polymer compositions in cementitious materials is reduced is compared to polyglycerol polymer not having the carboxylated-carboxylic groups, while its water reducing ability is maintained without loss of early compressive strength. Cementitious compositions and methods involving the carboxylated-carboxylic polyglycerol are also covered by the invention.Type: GrantFiled: May 6, 2011Date of Patent: September 2, 2014Assignee: W. R. Grace & Co.-Conn.Inventors: Lawrence L. Kuo, Izabela Goc-Maciejewska, Romain Faivre
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Patent number: 8802753Abstract: An additive for manufacturing permeable concretes with improved properties and method for manufacturing the same are provided. The additive comprises in a total composition: 33.70 to 54.90% water; 0.30 to 0.50% defoamer; 0.30 to 0.40% bactericide; 0.30 to 0.50% polyglycol; 7.20 to 24.00% of a combination of emulsifiers; 15.50 to 17.00% moisturizer; 0.8 to 22.90% dispersant; and 0.70 to 1.00% biopolymer. The additive for manufacturing permeable concretes can be added to any type of stony aggregate and/or cement improving the product's mechanical properties required in each step before, during, and after of the setting.Type: GrantFiled: June 28, 2012Date of Patent: August 12, 2014Inventor: Jaime Grau Genesias
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Publication number: 20140174325Abstract: A process for the production of a hydraulic binder, includes co-grinding a clinker and 0.1 to 5% by dry mass relative to the mass of clinker, of a material including more than 15% by mass of calcium silicate hydrate relative to the solid fraction of the material.Type: ApplicationFiled: July 13, 2012Publication date: June 26, 2014Applicant: LAFARGEInventors: Xiaolin Pardal, Pascal Dion
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Patent number: 8685156Abstract: The present invention relates to the use of polycationic compound in combination with a hydroxycarboxylic acid or salt thereof to enhance slump retention in cements and concretes having clay-bearing aggregates, wherein the clay otherwise absorbs or diminishes the dosage efficiency of polycarboxylate superplasticizers.Type: GrantFiled: July 10, 2009Date of Patent: April 1, 2014Assignee: W. R. Grace & Co.-Conn.Inventors: Hideo Koyata, Shuqiang Zhang, Byong-wa Chun
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Publication number: 20140076203Abstract: A hardening accelerator for mineral binders including an amino alcohol A and/or of a salt of said amino alcohol A, for example, cementitious binders, is provided. The amino alcohol A has a structure according to formula (I) where a) R1 and R2, independently of one another, each represent an alkanol group including 3-4 carbon atoms, b) R3 is an organic group including 1-8 carbon atoms, and c) R3 is different from R1 and/or R2.Type: ApplicationFiled: November 26, 2013Publication date: March 20, 2014Applicant: SIKA TECHNOLOGY AGInventors: Beat MARAZZANI, Christian Bürge, Christophe Kurz, Gilbert Mäder
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Patent number: 8648120Abstract: The present invention provides a liquid rheology modifier containing compounds (A) and (B) selected from combination (1) of compound (A) selected from cationic surfactants and compound (B) selected from anionic aromatic compounds and combination (2) of compound (A) from cationic surfactants and compound (B) selected from brominated compounds; and dicarboxylic acid (C).Type: GrantFiled: September 5, 2007Date of Patent: February 11, 2014Assignee: Kao CorporationInventors: Koji Koyanagi, Hotaka Yamamuro, Toshiharu Kojima
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Patent number: 8591646Abstract: The present invention relates to construction materials comprising at least one binder, at least one oil-containing filler and at least one metallate additive according to formula (1): (RO)m-M-(Oa—Xb—R?c—Yd)n??(1) wherein M is one of titanium and zirconium. The present invention also relates to methods of preparing and using the inventive construction materials. The inventive construction material compositions are capable of utilizing oil-containing fillers in which the oil is stable in the final composition and the desired mechanical properties of the construction material are maintained or improved.Type: GrantFiled: August 17, 2011Date of Patent: November 26, 2013Assignee: S&E Innovative Technologies LLCInventor: Salvatore J. Monte
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Patent number: 8551240Abstract: A cement retarder system for use in underground wells included a borate compound, an organophosphonate salt, and a copolymer formed from AMPS and a monomer selected from the group consisting of acrylic acid, acrylamide and mixtures thereof.Type: GrantFiled: March 3, 2010Date of Patent: October 8, 2013Assignee: Schlumberger Technology CorporationInventors: Michel Michaux, Tatiana Pyatina
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Patent number: 8506701Abstract: The present invention provides the production of the hydraulic powder containing C3A in an amount of 0.5 to 9.5% by weight through a step of grinding a hydraulic compound in the presence of the alkanolamine having a freezing point of not higher than 0° C.Type: GrantFiled: July 14, 2011Date of Patent: August 13, 2013Assignee: Kao CorporationInventors: Keiichiro Sagawa, Masaaki Shimoda, Koji Nagasawa
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Patent number: 8460457Abstract: The present invention discloses compositions and methods wherein air entrained in cementitious materials at least one air-entraining cement additive is detrained using an ethoxylated, propoxylated fatty alcohol or alkylphenol having robustness for withstanding the harsh temperature and mechanical shearing effects of cement grinding mills. Exemplary air-entraining cement additives include a tertiary alkanolamine, a lignosulfonic acid or salt thereof, naphthalene sulfonate formaldehyde condensate, melamine sulfonate formaldehyde condensate, a glycol, a glycerin, or mixtures thereof.Type: GrantFiled: August 5, 2010Date of Patent: June 11, 2013Assignee: W. R. Grace & Co.-Conn.Inventor: Josephine Cheung
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Patent number: 8394191Abstract: A cementitious composition including cement, water, and a rheology modifying additive (RMA) is provided. The inclusion of the RMA improves the cementitiuous composition's response to vibration, and dampens out differences due to minor fluctuations in initial slump of the composition. The RMA may include a dispersant for cementitiuous compositions. The cementitious composition may optionally include other admixtures or additives known in the industry. A method for making the cementitious composition is also provided.Type: GrantFiled: December 5, 2007Date of Patent: March 12, 2013Assignee: Construction Research & Technology GmbHInventor: Jeffrey R. Bury
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Patent number: 8377196Abstract: A dry cast cementitious composition including cement, water, and a rheology modifying additive (RMA) is provided. The inclusion of the RMA improves the dry cast cementitious composition's response to vibration and dampens out differences due to minor fluctuations in initial slump of the composition. The RMA may include a dispersant for the dry cast cementitious compositions. The dry cast cementitious composition may optionally include other admixtures or additives known in the industry. Methods for making the dry cast cementitious composition and dry cast cementitious articles from the composition are also provided.Type: GrantFiled: August 8, 2008Date of Patent: February 19, 2013Assignee: Construction Research & Technology GmbHInventors: Jeffrey R. Bury, Lynn E. Brower
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Publication number: 20130036948Abstract: Provided herein are compositions, methods, and systems for a material containing metastable carbonate and stabilizer. Methods for making the compositions and using the compositions are also provided.Type: ApplicationFiled: April 26, 2012Publication date: February 14, 2013Inventors: MIGUEL FERNANDEZ, Irvin Chen, Patricia Tung Lee, Matthew Ginder-Vogel
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Patent number: 8361220Abstract: A strength improvement admixture composition is provided that increases the compressive strength of cementitious compositions without negatively increasing the setting time. The admixture comprises the components of a polycarboxylate dispersant, a set retarder, and a strength improvement additive.Type: GrantFiled: July 31, 2012Date of Patent: January 29, 2013Assignee: Construction Research & Technology GmbHInventors: Jeffrey R. Bury, Thomas M. Vickers, Jr., Bruce J. Christensen
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Patent number: 8353983Abstract: To provide shrinkage reducing agents which render excellent shrinkage reducing effect and frost-thaw resistance to cement compositions such as mortar and concrete without entraining excessive air, and exhibit excellent solution stability. The shrinkage reducing agent comprises a (poly)alkylene compound having an unsaturated bond represented by the formula (1): R2O—R1—O-(A1O)n—R3??(1) -(A2O)m—R4??(2) (wherein R1 is a C2-10 hydrocarbon group having an unsaturated bond; R2 is hydrogen or the formula (2); R3 and R4 are each independently hydrogen or a C1-8 alkyl group; A1O and A2O are one or more kinds of C2-4 oxyalkylene groups; and n and m are mean addition numbers of moles of A1O and A2O, respectively, and 1 to 20).Type: GrantFiled: December 8, 2008Date of Patent: January 15, 2013Assignee: Construction Research & Technology GmbHInventors: Tomomi Sugiyama, Takumi Sugamata
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Publication number: 20120298013Abstract: A strength improvement admixture composition is provided that increases the compressive strength of cementitious compositions without negatively increasing the setting time. The admixture comprises the components of a polycarboxylate dispersant, a set retarder, and a strength improvement additive.Type: ApplicationFiled: July 31, 2012Publication date: November 29, 2012Inventors: Jeffrey R. Bury, Thomas M. VICKERS, JR., Bruce J. CHRISTENSEN
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Patent number: 8298328Abstract: A novel amorphous divalent metal ion salt for enhancing the manageability of a Portland cement and its application in dental field are disclosed. Typical formula (I), (II), or (III) of this amorphous metal ion salt are shown as following: M 2 + ? A x - ? B 2 - x - ( I ) M 2 + ? A y 2 - ? C ( 4 - y ) 4 2 - ( II ) M 2 + ? A z 3 - ? D ( 6 - z ) 9 3 - ( III ) wherein, M2+, A?, B?, C?2, D?3, x, y, and z are defined the same as the specification. A novel tooth filling material comprises: a Portland cement, a bone substitute substance, and an amorphous divalent metal ion salt with formula of (I), (II), or (III). In addition, a novel root canal filling material comprises: a Portland cement, a radiopaque substance, and an amorphous divalent metal ion salt with formula of (I), (II), or (III).Type: GrantFiled: December 1, 2009Date of Patent: October 30, 2012Assignee: Taipei Medical UniversityInventors: Jeng-Chang Yang, Pei-Ying Lee, Dian-Yu Ji, Nai-Chia Teng, Sung-Chih Hsieh, Sheng-Yang Lee
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Patent number: 8277556Abstract: Lightweight cementitious foams of the invention have excellent dynamic and dimensional stability due to use of foaming system comprising polycarboxylate surfactant foam generating agent, foam stabilizer (e.g., PVOH), and shrinkage reducing admixture to inhibit plastic shrinkage and micro-cracking of cement. The foaming system can be used in conventional cement mortars or concretes as well as with exemplary cementitious slurry systems of the invention, which include an expansive agent, a cross-linking agent for the foam stabilizer. Microfibers can be used in the foam, slurry, or both, to prevent micro-cracking. Cementitious foams can be made without use of autoclave or lightweight aggregates to achieve enhanced compressive strength and thermal insulation properties that compare favorably with conventional foams and insulation materials at comparable densities.Type: GrantFiled: June 5, 2009Date of Patent: October 2, 2012Assignee: W. R. Grace & Co.-Conn.Inventors: Neal S. Berke, Jordan S. Merritt, Lianfang Li, Antonio J. Aldykiewicz, Jr., Robert A. Wiercinski, Michael D. Morgan
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Patent number: 8258210Abstract: A strength improvement admixture composition is provided that increases the compressive strength of cementitious compositions without negatively increasing the setting time. The admixture comprises the components of a polycarboxylate dispersant, a set retarder, and a strength improvement additive.Type: GrantFiled: February 26, 2004Date of Patent: September 4, 2012Assignee: Construction Research & Technology GmbHInventors: Jeffrey R. Bury, Thomas M. Vickers, Jr., Bruce J. Christensen
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Patent number: 8246741Abstract: The invention relates to a composition comprising at least one plasticizer for a hydraulically setting composition and at least one polyalkylene glycol. The invention also relates to a process that uses the composition for improving the processibility, in particular for extending the processing time, of hydraulically setting compositions.Type: GrantFiled: December 8, 2006Date of Patent: August 21, 2012Assignee: Sika Technology AGInventors: Franz Wombacher, Urs Maeder
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Patent number: 8221543Abstract: The present invention relates to a fluoride-free solidification and hardening accelerator for hydraulic binders, comprising sulfate, aluminum and organic acid, the molar ratio of aluminum to sulfate being less than 0.83.Type: GrantFiled: February 13, 2008Date of Patent: July 17, 2012Assignee: Sika Technology AGInventors: Heinz Schürch, Franz Wombacher, Benedikt Lindlar, Didier Lootens, Robert Flatt
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Publication number: 20120137932Abstract: The present invention discloses compositions and methods wherein air entrained in cementitious materials at least one air-entraining cement additive is detrained using an ethoxylated, propoxylated fatty alcohol or alkylphenol having robustness for withstanding the harsh temperature and mechanical shearing effects of cement grinding mills. Exemplary air-entraining cement additives include a tertiary alkanolamine, a lignosulfonic acid or salt thereof, naphthalene sulfonate formaldehyde condensate, melamine sulfonate formaldehyde condensate, a glycol, a glycerin, or mixtures thereof.Type: ApplicationFiled: August 5, 2010Publication date: June 7, 2012Inventor: Josephine Cheung
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Patent number: 8187375Abstract: A composition for use in construction that is substantially free of volatile organic compounds (VOC) that when applied to a surface produces a smooth or textured, water-shedding (hydrophobic properties), aesthetically-pleasing, protective continuous coating. The coated surface as well as the method of preparing and applying the composition is also provided.Type: GrantFiled: July 29, 2011Date of Patent: May 29, 2012Assignee: Formulated Solutions, LLCInventors: John Garuti, Jr., Louis M. Calvo
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Patent number: 8182604Abstract: A method of forming a high strength cement in a permeable starting material, the method comprising the step of combining the starting material with effective amounts of (i) a urease producing micro-organism; (ii) urea; and (iii) calcium ions and wherein the effective amount of the urease producing organism provides a urea hydrolysis rate, under standard conditions, of 0.5-50 mM urea hydrolysed.min?1.Type: GrantFiled: December 20, 2005Date of Patent: May 22, 2012Assignees: Murdoch University, Calcite Technology Pty LtdInventors: Edward S. Kucharski, Ralf Cord-Ruwisch, Vicky Whiffin, Salwa M. Al-thawadi
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Patent number: 8177905Abstract: A fluidizing admixture for use with sprayable cementitious compostions, the admixture consists of 2-phosphonobutane-1,2,4-tricarboxylic acid and at least one selected polymer derived from ethylenically-unsaturated mono- or dicarboxylic acids. Citric acid may optionally be present. The admixture has good fluidizing properties and outstanding shelf-life.Type: GrantFiled: January 27, 2010Date of Patent: May 15, 2012Assignee: Construction Research & Technology GmbHInventors: Gerhard Albrecht, Max Oppliger, Qiwei Yang, Hubertus Matthias Zink
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Patent number: 8177904Abstract: The use of polymeric microparticles having a cavity in hydraulically setting building material mixtures is described, from 1 to 100% by volume of the cavity of these microparticles being filled with water. In this way, remarkable concrete resistance to the freezing and thawing cycle is achieved, these microparticles providing improved protection for the concrete from the effects of the freezing and thawing cycle, even at a diameter of from 0.1 to 1 ?m and in doses which are 1 to 2 orders of magnitude lower than those described in the prior art. Moreover, the compressive strength of the correspondingly hardened concrete is substantially improved, which was likewise not foreseeable.Type: GrantFiled: November 4, 2008Date of Patent: May 15, 2012Assignees: Construction Research & Technology GmbH, Evonik Rohm GmbHInventors: Lars Einfeldt, Gerhard Albrecht, Gerd Löhden, Holger Kautz
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Patent number: 8167997Abstract: Flowable concrete mixtures have an aqueous foam admixture mixed therein to give the concrete mixture desired strength, flowability, and density. The concrete mixtures include a hydration stabilizer to stabilize the aqueous foam. The hydration stabilizer inhibits the reaction between the hydraulic cement and the water in the aqueous foam. The aqueous foam can be stabilized using a fluorochemical surfactant.Type: GrantFiled: February 5, 2010Date of Patent: May 1, 2012Assignee: Jack B. Parson CompaniesInventor: Lonnie James Gray
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Patent number: 8148304Abstract: A copolymer containing, as monomer components, a) at least one sulfonic acid-containing compound, b) at least one nitrogen-containing N-vinylamide, one acrylamide or methacrylamide and c) at least one bifunctional or higher-functional vinyl ether is proposed. These copolymers are suitable in particular as thixotropic agents, antisegregation agents and water retention agents and overall as an additive in cement-containing but also gypsum-based systems. Such copolymers having a molecular weight of >40 000 g/mol can be used in particular as admixtures in the exploration of mineral oil and natural gas deposits.Type: GrantFiled: November 24, 2008Date of Patent: April 3, 2012Assignee: BASF SEInventors: Christian Spindler, Andrea Assmann, Uwe Huber
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Patent number: 8147609Abstract: A non-dispersible concrete for underwater and underground construction is disclosed, whose composition primarily comprises: coarse aggregate in a range of from 600 to 1200 kgw/m3; fine aggregate 500 to 1100 kgw/m3, with a fineness modulus (F.M.) in a range of from 2.2 to 3.2; powder 300 to 700 kgw/m3; mixing water 140 to 300 kgw/m3; and cohesion-enhancing admixture (for example, polyacrylamide, PAA) whose solid content is 0.1 to 5.0 wt % of the powder. In addition, a SCC for underwater and underground construction is also developed and has excellent property of self-consolidation (its test value is 400 to 750 mm in slump flow spread test) and an appropriate compressive strength (between 14 to 70 MPa), so as can be widely applied to underwater and underground construction, whose composition further includes superplasticizer with solid content 0.1 to 3.0 wt % of the powder. Also, it covers: water to binder ratio (W/B) of 0.22 to 1.00, paste volume 0.25 to 0.60 m3, and water/powder volume ratio 0.5 to 2.95.Type: GrantFiled: May 21, 2007Date of Patent: April 3, 2012Inventor: Wen-Chen Jau
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Patent number: RE43253Abstract: A lightweight concrete composition containing from 10 to 90 volume percent of a cement composition, from 10 to 90 volume percent of particles having an average particle diameter of from 0.2 mm to 8 mm, a bulk density of from 0.03 g/cc to 0.64 g/cc, an aspect ratio of from 1 to 3, and from 0 to 50 volume percent of aggregate; where the sum of components used does not exceed 100 volume percent, and where after the lightweight concrete composition is set it has a compressive strength of at least 1700 psi as tested according to ASTM C39 after seven days. The concrete composition can be used to make concrete masonry units, construction panels, road beds and other articles.Type: GrantFiled: April 29, 2010Date of Patent: March 20, 2012Assignee: NOVA Chemicals Inc.Inventors: Tricia Guevara Ladely, Michael T. Williams, David A. Cowan, John K. Madish, Kolapo Adewale, Roger Moore, Mary Margaret Moore, legal representative, Blain Hileman