Organic Nitrogen Compound Patents (Class 106/727)
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Patent number: 5413819Abstract: The storage and processing times of sprayed concrete can be significantly extended by the addition of a retarder, a chemical compound which is capable of chelating with calcium ions. Preferred retarders are phosphonic acid derivatives which have at least one amino and/or hydroxyl group. The retarder can be used for both wet- and dry-sprayed concrete, the usual accelerators can be used for activation, and the strength is not adversely affected.Type: GrantFiled: November 29, 1993Date of Patent: May 9, 1995Assignee: Sandoz Ltd.Inventor: Josef F. Drs
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Patent number: 5403394Abstract: An additive to cement based materials to render the materials self-leveling upon being mixed with water and applied as a coating upon a floor substrate. The additive comprises a formaldehyde based resin, preferably melamine formaldehyde, and a water retention agent, preferably xanthan gum alone, hydroxyethyl cellulose alone, or a combination thereof.Type: GrantFiled: February 24, 1994Date of Patent: April 4, 1995Inventor: Yves Burgand
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Patent number: 5389143Abstract: The present invention relates to the use of .alpha., .beta.-amino alcohols as a cement admixture to inhibit drying shrinkage of resultant cement compositions.Type: GrantFiled: July 29, 1993Date of Patent: February 14, 1995Assignee: W. R. Grace & Co.-Conn.Inventors: Ismail Abdelrazig, Paul C. Scheiner
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Patent number: 5372643Abstract: The invention relates to an agent increasing the rate of hardening of cements, mortars and concretes while maintaining their workability. It also concerns an adjuvant for cements, mortars and concretes, comprising an effective quantity of said agent, and the cements, mortars and concretes comprising an effective quantity of said agent or said adjuvant. This agent corresponds to the formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3, which may be identical or different, denote the hydrogen atom or an alkyl, substituted alkyl, alkene, aryl or aralkyl group,B denotes a hydrocarbon chain containing at least one --CH.sub.2 -- unit and in which the number of carbons situated in the chain is smaller than or equal to 10,A denotes the groups: ##STR2## in which: X denotes an organic or inorganic anion and in particular a halogenR.sub.5, R.sub.6 and R.sub.7, which may be identical or different, denote alkyl, substituted alkyl, alkene, aryl or aralkyl radicals.Type: GrantFiled: July 9, 1993Date of Patent: December 13, 1994Assignee: Roquette FreresInventors: Serge Gosset, Didier Videau
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Patent number: 5368642Abstract: A functionalized polyamine effective to retard the setting rate of a slurry of hydraulic cement is disclosed. A slurry of hydraulic cement in water which includes the functionalized polyamine, which is a polyethylene amine having attached thereto moieties selected from the group consisting of carboxylic acid groups and phosphonic acid groups, is useful to cement a conduit in a subterranean formation penetrated by a wellbore wherein it is desirable to retard the setting rate of the cement to enable placement of the slurry.Type: GrantFiled: August 20, 1993Date of Patent: November 29, 1994Assignee: Halliburton CompanyInventors: Klein A. Rodrigues, Larry S. Eoff
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Patent number: 5356671Abstract: A process for improving the rebound properties of sprayed concrete comprises the inclusion therein of micro-silica which has been pretreated with from 2 to 25% by weight thereof of a liquid selected from water, an alkanolamine, a polyol and an aqueous solution of at least one concrete additive, an alkanolamine, a polyol and a water-soluble cellulosic compound. The process is especially effective when used in conjunction with the dry spraying process.Type: GrantFiled: March 17, 1993Date of Patent: October 18, 1994Assignee: Sandoz Ltd.Inventor: Josef F. Drs
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Patent number: 5352290Abstract: A concrete composition which has superior fluidity and filling property and from which a concrete structure having high quality and durability and being excellent in resistance to freezing and thawing can be made without compaction by vibration. The composition comprises cement, water, aggregate, at least one admixture selected from the group consisting of a water reducing agent, an air entraining agent, an air entraining water reducing agent and a superplasticizer, and at least one viscosity improver of a cellulose type of viscosity improver having a low foaming property which shows specific viscosity and an acrylic type of viscosity improver having a low viscosity which shows specific viscosity in a specified amount.Type: GrantFiled: June 23, 1992Date of Patent: October 4, 1994Assignee: JDC CorporationInventors: Haruyuki Takeshita, Haruya Sawara, Shohei Hoshino, Yoshiyuki Shoji
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Patent number: 5348582Abstract: The invention relates to mineral building materials which contain binders, optionally aggregates and at least one additive, characterized in that the additives used are compounds which are condensation products of substituted or unsubstituted diphenyl sulphones, formaldehyde and compounds from the group consisting of mononuclear or polynuclear, substituted or unsubstituted aromatic compounds, acid amides, urea, urea derivatives, substituted or unsubstituted aromatic ethers and imines.Type: GrantFiled: May 20, 1993Date of Patent: September 20, 1994Assignee: Bayer AGInventors: Joachim Herzig, Kurt Bredtmann, Birger Knickel, Cornelia Dorzbach-Lange
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Patent number: 5346012Abstract: Fine particle size cement compositions and methods of using such compositions for cementing in a subterranean zone penetrated by a well bore are provided. The compositions are basically comprised of a fine particle size hydraulic cement, a fine particle size pozzolanic material and sufficient water to form a pumpable slurry.Type: GrantFiled: February 1, 1993Date of Patent: September 13, 1994Assignee: Halliburton CompanyInventors: James F. Heathman, Ronald J. Crook
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Patent number: 5340397Abstract: Set retarded ultra fine cement compositions which remain pumpable for a predictable period of time at temperatures up to about 240.degree. F. are provided. The compositions are basically comprised of an ultra fine hydraulic cement, sufficient water to form a pumpable slurry and a set retarder comprised of a methylenephosphonic acid derivative.Type: GrantFiled: August 30, 1993Date of Patent: August 23, 1994Assignee: Halliburton CompanyInventor: Lance E. Brothers
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Patent number: 5339903Abstract: A method of cementing a wellbore which penetrates a subsurface gas-containing formation is provided whereby gas migration is reduced. The method features the use of an additive consisting of a tannin backbone having grafted thereto at least two different vinylamide derivatives. The additive causes the cement slurry employed in the method to exhibit a Zero Gel Time of greater than about one hour, a Transition Time of less than about one hour and controls fluid loss from the slurry.Type: GrantFiled: November 12, 1993Date of Patent: August 23, 1994Assignee: Halliburton CompanyInventors: Larry S. Eoff, Bill W. Loughridge
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Patent number: 5332435Abstract: A hydraulic cement mix including hydraulic cement, aggregate, sufficient water to effect hydraulic setting of the cement, and a polyamidoamine additive, the additive being present in an amount sufficient to increase the bonding strength of the hardened mix. Generally, the additive is present in a total amount of about 0.025 to 0.25% by weight based upon the weight of the cement, preferably in an amount in the range of about 0.075 to 0.15% by weight.Type: GrantFiled: November 12, 1993Date of Patent: July 26, 1994Assignee: Westvaco CorporationInventors: Bruce T. Wright, Peter Schilling
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Patent number: 5326397Abstract: A cement composition capable of inhibiting drying shrinkage and cracking resulting therefrom composed of cement and an alkyl or cycloalkyl carbamate, an alkylene dicarbamate, polyoxyalkylene dicarbamate or mixtures thereof.Type: GrantFiled: July 29, 1993Date of Patent: July 5, 1994Assignee: W. R. Grace & Co.-Conn.Inventors: Baha E. I. Abdelrazig, Ellis M. Gartner, David F. Myers
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Patent number: 5326396Abstract: The present invention is directed to a cement admixture and the resultant cement composition capable of inhibiting drying shrinkage and crack formation resulting therefrom.Type: GrantFiled: July 29, 1993Date of Patent: July 5, 1994Assignee: W. R. Grace & Co.-Conn.Inventors: Baha E. I. Abdelrazig, Ellis M. Gartner, David F. Myers
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Patent number: 5306344Abstract: The present invention is a specific combination of components having unique properties both in composition and benefits. Such a combination of portland cement type 1, fly ash type C in combination with a specific gradation of blast furnace slag and a specific gradation of fine aggregate in combination with a sodium lignosulfonic acid, sodium nitrate, sodium thiocyanate, triethanolamine, neutralized Vinsol resin and a coconut fatty acid diethanolamine.Type: GrantFiled: December 2, 1992Date of Patent: April 26, 1994Assignee: Edward C. Levy CompanyInventors: Paul F. Gutmann, James L. Thornley
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Patent number: 5292367Abstract: A dispersant for spacer fluids, cement slurries, completion fluids and mixtures of drilling fluids and cement slurries used for drilling and cementing subterranean wells.Type: GrantFiled: November 24, 1992Date of Patent: March 8, 1994Assignee: Atlantic Richfield CompanyInventors: James B. Bloys, William N. Wilson, Edward Malachosky, Robert B. Carpenter, Roger D. Bradshaw
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Patent number: 5281271Abstract: Cement based finishing compositions are disclosed in which use of portland cement as a binder is significantly reduced without adversely affecting bonding or adhesion and while enhancing coverage of surface area, workability and hiding power or opaqueness. The composition, when mixed with an appropriate amount of water can be applied in a single coating over a primed surface on a masonry, concrete, sand rendering, brick work, cement blocks and the like to give a finished, homogenous surface.In another embodiment a floor and wall topper composition is disclosed which, when mixed with water at lower than conventional proportions, provides a rock-hard, either jointless or compartmented sections having improved compressive and flexural strength and resistance to wear and tear.Type: GrantFiled: October 5, 1992Date of Patent: January 25, 1994Assignee: HITEK Fine Chemicals Pvt. Ltd.Inventors: Kishore K. Govani, Bhanu K. Govani, Ramesh K. Govani
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Patent number: 5275654Abstract: Cement-to-casing sealing in a wellbore is improved through addition of surfactant to the cement.Type: GrantFiled: April 13, 1992Date of Patent: January 4, 1994Assignee: Shell Oil CorporationInventor: Kenneth M. Cowan
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Patent number: 5256199Abstract: Cement and aggregates are mixed with each other by the use of a dispersant to the effect of water reduction and prevention of slump loss, the dispersant comprising (1) (I), (IIa), and an amine reaction terminator of (IIb), (IIc), (IVg) and/or (IVh); (2) (I), (IIb) and/or (IIc) and (IIIe) and/or (IIIf); or (3) (I), (IIa) and (IIIe) and/or (IIIf), in which formulae, R is hydrogen or an alkyl having 1 to 6 carbon atoms; X is an alkali metal; X.sub.1 is hydrogen, an alkyl having 1 to 6 carbon atoms, carboxylic acid group, an alkali metal salt carboxylate, sulfonic acid group, an alkali metal salt sulfonate, hydroxy or methoxy; Y.sub.1 is carboxylic acid or an alkali metal salt carboxylate, sulfonic acid or an alkali metal salt sulfonate; Y is hydrogen or an alkali metal; Z is hydrogen, an alkyl having 1 to 6 carbon atoms or --CH.sub.2 SO.sub.3 M; and M is hydrogen or an alkali metal.Type: GrantFiled: July 30, 1991Date of Patent: October 26, 1993Assignee: Kao CorporationInventors: Fuzio Yamato, Shuichi Fujita, Tatsuo Izumi, Yoshiaki Tanisho, Kazushige Kitagawa
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Patent number: 5245001Abstract: The present invention relates to aminoarylsulfonic acid-phenol-formaldehyde condensate useful for incorporation into cementing compositions, for example, mortar, cement paste and the like, for improving slumping characteristics.Type: GrantFiled: October 9, 1991Date of Patent: September 14, 1993Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi, Tsutomu Teraji
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Patent number: 5244498Abstract: The present invention relates to a method of retarding the set of residual concrete in a concrete holding vessel comprising uniformly directing an aqueous solution containing an effective amount of a set retarding agent against the residual concrete on the inner surface of said concrete holding vessel with sufficient pressure to retard concrete set with less than about 3 gallons of aqueous solution per every 10 lbs. of residual concrete. The present invention also relates to an apparatus which utilizes a minimal amount of wash water.Type: GrantFiled: April 9, 1991Date of Patent: September 14, 1993Assignee: W. R. Grace & Co. of Canada Ltd.Inventor: Lloyd E. Steinke
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Patent number: 5232497Abstract: A clay control additive for cement composition of the general formula: ##STR1## wherein the R groups are selected from a C.sub.1 to C.sub.4 substituted alkyl.Type: GrantFiled: April 30, 1992Date of Patent: August 3, 1993Assignee: The Western Company of North AmericaInventors: Robert L. Dillenbeck, Scott G. Nelson, Bobby E. Hall, Dean S. Porter
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Patent number: 5217531Abstract: Disclosed are cementing compositions and methods of using wherein the cementing compositions comprise: (a) aqueous solution, (b) hydraulic cement, (c) a N-vinylpyrrolidone-acrylamide random copolymer, and (d) a sulfonate containing cement dispersant. The copolymer is present in the composition in an amount of from 0.05 to 5.0 weight percent based on the weight of dry cement. Use of the present invention as a fluid loss additive will result in significant reductions in water loss rate.Type: GrantFiled: December 23, 1991Date of Patent: June 8, 1993Assignee: The Western Company of North AmericaInventor: Ping-Sun R. Cheung
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Patent number: 5211751Abstract: New set-accelerating admixtures for hydraulic cement compositions are disclosed. These admixtures incorporate set-accelerating compounds and methylol derivatives of amino acids, are found to be surprisingly effective in decreasing the initial set time of hydraulic cements, mortars, and concretes, and are particularly advantageous in reduced-temperature set-accelerators.Type: GrantFiled: February 28, 1992Date of Patent: May 18, 1993Assignee: W.R. Grace & Co.-Conn.Inventors: Ahmad Arfaei, Leslie A. Jardine, Ara Jeknavorian
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Patent number: 5207832Abstract: This invention relates to a lightened gas-impermeable cement grout which comprises hydraulic cement, water, silica fumes in an amount of from about 5 to about 65 weight % based on the weight of the cement, and at least one polyethylene imine having a molecular weight of between about 600,000 and about 1,000,000 in an amount of from about 1 to about 25% weight % based on the weight of the water.Type: GrantFiled: October 11, 1991Date of Patent: May 4, 1993Assignees: Total Compagnie Francaise des Petroles, Ciments d'OrignyInventors: Daniel Baffreau, Jean-Claude Laugerotte, Nicolas Musikas
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Patent number: 5203919Abstract: Method and compositions for the stabilization (prevention of hardening) of concrete residues in Ready-Mix truck drums.Type: GrantFiled: March 27, 1992Date of Patent: April 20, 1993Assignee: Sandoz Ltd.Inventors: Gregory S. Bobrowski, Robert J. Ryan
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Patent number: 5176753Abstract: A chloride-free admixture for use as a cold weather (e.g., 13.degree. F. to 40.degree. F.) concrete set accelerator. The admixtures comprise;1) at least one soluble inorganic salt having freezing point depressant properties,2) at least one water reducing dispersant, e.g., superplasticizer,3) at least one inorganic early set and strength accelerator, and optionally,4) at least one inorganic set accelerator.Type: GrantFiled: November 12, 1991Date of Patent: January 5, 1993Inventor: John W. Brook
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Patent number: 5162060Abstract: A coating composition is used for coating or overlaying Portland cement concrete or metal. The composition includes a synthetic polymer latex having ureido functional groups, an amine-functional epoxy curing agent, a liquid epoxy resin, and a hydraulic cement. The coating composition has superior thermal shock resistance and low cost in comparison with epoxy/amine-type polymer concrete, and excellent strength development and chemical resistance in comparison with conventional latex-based cementitious compositions. The coating composition can be mixed from a pair of storage-stable components; a dry mix including the hydraulic cement and the epoxy resin, and optionally larger size aggregate, and a wet mix including the polymer latex and the amine curing agent.Type: GrantFiled: December 14, 1989Date of Patent: November 10, 1992Assignee: Rohm and Haas CompanyInventors: Charles W. Bredow, Frederick J. Schindler
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Patent number: 5156679Abstract: A hydraulic cement admixture capable of air detrainment to structures formed therefrom comprising water-soluble alkylated alkanolamine salts.Type: GrantFiled: August 12, 1991Date of Patent: October 20, 1992Assignee: W. R. Grace & Co.-Conn.Inventors: Ellis M. Gartner, David F. Myers
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Patent number: 5112405Abstract: Compositions for lightweight, waterproof, cementitious materials comprise portland cement, aggregates, two admixtures, and water. A first admixture comprises a major portion of calcium chloride and minor portions of sodium silicate and a wetting agent. A second admixture comprises an emulsion of ammonium stearate. Methods for producing cementitious materials include a process for manufacturing strong, lightweight, waterproof building products such as roofing tile, imitation bricks, and the like.Type: GrantFiled: November 16, 1990Date of Patent: May 12, 1992Inventor: Michael A. Sanchez
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Patent number: 5102467Abstract: A hydraulic cement admixture capable of enhancing the latter stage set strength of the cured composition comprising certain mono- and disubstituted (dialkanolaminomethyl) phenols.Type: GrantFiled: July 19, 1991Date of Patent: April 7, 1992Assignee: W.R. Grace & Co.-Conn.Inventors: Ellis M. Gartner, Robert P. Kreh
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Patent number: 5099922Abstract: This invention involves cementing compositions for the oil industry and their use in cementing wells. More specifically, this invention involves the control of the gas migration or gas channeling phenomenon that occurs during the setting of a cement slurry. A cementing composition, capable of inhibiting gas channeling, comprised of gaseous fluid, hydraulic cement, and a gas channeling inhibiting additive comprised of a copolymer 2-acrylamido-2 methylpropane-3-sulphonic acid, N-vinylacylamide and acrylamide, is provided.Type: GrantFiled: March 26, 1991Date of Patent: March 31, 1992Assignee: The Western Company of North AmericaInventor: Kalyan K. Ganguli
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Patent number: 5092935Abstract: A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a copolymer of acrylamide/vinyl formamide and derivatives thereof in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.Type: GrantFiled: February 26, 1990Date of Patent: March 3, 1992Assignee: BASF CorporationInventors: Stefano C. Crema, Clare H. Kucera
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Patent number: 5092934Abstract: The present invention relates to aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same for incorporation in cementing compositions, for example, mortar, cement paste and the like, for improving slumping characteristics.Type: GrantFiled: March 26, 1990Date of Patent: March 3, 1992Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi, Tsutomu Teraji
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Patent number: 5084103Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinker during finish milling.Type: GrantFiled: August 2, 1990Date of Patent: January 28, 1992Assignee: W. R. Grace & Co.-Conn.Inventors: David F. Myers, Ellis M. Gartner
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Patent number: 5076851Abstract: A mixed gypsumless Portland cement of high initial and long-lasting strengths which contains 60-96.7 weight percent gypsumless Portland cement clinker with the specific surface of 350-550 m.sup.2 /kg and 3-40 weight percent of ground latently hydraulic matter, such as granulated blast-furnace slag, light ash, and the like, which two components have been ground in the presence of 0.01-0.1 weight percent of a liquid milling admixture, advantageously with a synthetic surface active matter with wetting properties, and containing 0-20 weight percent of fine amorphous SiO.sub.2 and/or 0.1-3 weight percent sulphonated polyelectrolyte or ligninsulphonate and 0.5-6 weight percent alkaline carbonate, hydrogen carbonate, or alkaline hydroxide.Type: GrantFiled: May 11, 1990Date of Patent: December 31, 1991Assignee: Ceskoslovenska Akademie VEDInventors: Frantisek Skovara, Pius Durovec, Bohumil Cernovsky, Tomas Vsetecka, Jaroslav Hrazdira, Zdenek Kadlec
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Patent number: 5076852Abstract: A cement method and composition for cementing a well penetrating subterranean formations and aqueous based drilling fluid containing at least one cement retarder characterized by a major proportion of the drilling fluid from the well as it was drilled; water; a lesser proportion of dry cementitious material; a minor amount of a dispersant that does not effect satisfactory set cement within an acceptable time interval; and an accelerator selected from the class consisting of acetic acid; the first 4 carbon esters thereof; acetamide; monoethanolamine; and diethanolamine. The first 4 carbon esters are the methyl; ethyl; propyl, both normal and isopropyl; and butyl ester, normal, isobutyl and tertiary butyl.Type: GrantFiled: April 29, 1991Date of Patent: December 31, 1991Assignee: Atlantic Richfield CompanyInventors: James B. Bloys, William N. Wilson, Roger D. Bradshaw
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Patent number: 5069721Abstract: Disclosed is a mortar.concrete composition comprising a polymer emulsion, a portland cement material and an aggregate, which is characterized in that the polymer emulsion is one prepared by neutralizing a seed polymer with an acid or a salt or by quaternizing it with a quaternizing agent, the surfaces of the emulsion grains being thereby highly densely cationated, where the seed polymer is formed by adding a monomer as represented by the following formula (I) or a mixture of the monomer (I) and copolymerizable ethylenic unsaturated monomer(s) to a seed latex of a carboxyl-modified synthetic rubber latex or synthetic resin emulsion and polymerizing them: ##STR1## The polymer of the invention may noticeably reinforce the strength of the shaped product even when the amount of the polymer added is small.Type: GrantFiled: March 22, 1990Date of Patent: December 3, 1991Assignee: Mitsui-Cyanamid, Ltd.Inventors: Akira Tamura, Naotaka Watanabe, Hitoshi Fujiyoshi, Masako Shirota
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Patent number: 5032181Abstract: Portland cement concrete-carbon fiber structure displays high tensile and flexural strengths, low electrical resistivity and high electromagnetic interference shielding effectiveness. The structure comprises cement concrete having a small predetermined proportion of carbon fibers dispersed therein. During the fabrication of the structure, there is added thereto an accelerating admixture comprising polyethanolamine and one of metal sulfate plus metal aluminum sulfate or metal nitrite plus metal chloride. The accelerating admixture comprises a small predetermined weight percentage of the cement in the structure. Additional improvements are obtained by using a small proportion of water-reducing agents.Type: GrantFiled: May 15, 1989Date of Patent: July 16, 1991Inventor: Deborah D. L. Chung
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Patent number: 5028271Abstract: A vinyl grafted lignite fluid loss additive comprising a lignite grafted with at least one vinyl monomer selected from the group consisting of: dimethylaminopropyl methacrylamide, methacrylamido propyltrimethyl ammonium chloride, N-vinylformamide, N-vinylacetamide, diallyl dimethyl ammonium chloride, diallylacetamide, and diallylamine. The vinyl monomer may also be blended with at least one co-monomer. Preferred co-monomers are: 2-acrylamido-2-methylpropanesulfonic acid, dimethylacrylamide, acrylamide, vinylpyrrolidone, vinylacetate, acrylonitrile, dimethylaminoethyl methacrylate, styrenesulfonate, vinylsulfonate, dimethylaminoethyl methacrylate methyl chloride quaternary, acrylic acid and its salts.Type: GrantFiled: February 5, 1990Date of Patent: July 2, 1991Assignee: Nalco Chemical CompanyInventors: David A. Huddleston, Charles D. Williamson
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Patent number: 5016711Abstract: Cement-to-casing sealing in a wellbore is improved through addition of surfactant to the cement.Type: GrantFiled: February 24, 1989Date of Patent: May 21, 1991Assignee: Shell Oil CompanyInventor: Kenneth M. Cowan
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Patent number: 5009713Abstract: The invention relates to a hydraulic cement composition comprising, as a carbonation inhibitor of the cement composition, at least one compound of the formula (I):A--(Y.sub.n --H).sub.lwherein A is a polyamine residue containing 2-10 carbon atoms,Y is --C.sub.3 H.sub.6 --O--,l is a number equal to 1-8,n is a number equal to 1-4,the product of n.times.l is equal to 13-20,the active hydrogen(s) involved in the amino groups in the polyamine residue being partly or wholly substituted with the residue(s) of propylene oxide.Type: GrantFiled: February 13, 1987Date of Patent: April 23, 1991Assignees: Fujisawa Pharmaceutical Company, Ltd., Takenaka Komuten Company, Ltd., Nippon Nyukazai Company, Ltd.Inventors: Masaharu Sakuta, Toshiharu Urano, Kyoichi Tanaka, Masashi Sugiyama, Shyuzo Endoh, Keisuke Fujioka
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Patent number: 4992104Abstract: The invention relates to the preparation of mortars and concretes in the presence of a water-reducing plasticizer. The plasticizer used is a surface-active compound containing at least one perfluoro group and at least one ionic or nonionic hydrophilic group. It is possible for these groups to be linked directly or via one or more divalent chain links.Type: GrantFiled: March 29, 1988Date of Patent: February 12, 1991Assignee: Societe AtochemInventor: Bernard Boutevin
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Patent number: 4990190Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinkder during finish milling.Type: GrantFiled: October 6, 1989Date of Patent: February 5, 1991Assignee: W. R. Grace & Co.-Conn.Inventors: David F. Myers, Ellis M. Gartner
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Patent number: 4975122Abstract: An improved water-resistant cementitious composition and products made therefrom are provided by forming an aqueous cementitious slurry, as for example of calcined gypsum and adding an organic amine preferably containing a hydroxyl functionality and a silanic hydrogen containing silicone compound. The slurry is set in conventional manner by heating and drying. The resulting product has a high degree of water-resistance and has no adverse effect upon the physical properties of the board.Type: GrantFiled: August 10, 1989Date of Patent: December 4, 1990Assignee: Siltech Inc.Inventors: Jeffrey K. Parkinson, Anthony J. O'Lenick, Jr.
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Patent number: 4964917Abstract: A method of reclaiming leftover ready-mix concrete comprising the steps of:(1) retarding the hydration of the unused portion of concrete returned from a job site; and(2) after the desired retarded period adding a hydration acceleration agent to restore the concrete to a settable state.Type: GrantFiled: March 8, 1990Date of Patent: October 23, 1990Assignee: Sandoz Ltd.Inventors: Gregory S. Bobrowski, Gregory C. J. Guecia, David A. Lupyan, Frederick D. Kinney
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Patent number: 4960465Abstract: Hydraulic cement compositions are disclosed containing a hydraulic cement and a graft copolymer, the graft copolymer containing a polyether backbone and side chains prepared by polymerization of an ethylenically unsaturated monomers. The graft copolymer functions as a plasticizer in the cement composition.Type: GrantFiled: November 23, 1987Date of Patent: October 2, 1990Assignee: W. R. Grace & Co.Inventor: Ahmad Arfaei
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Patent number: 4943323Abstract: This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C.sub.4 AF, when mixed with up to 0.2% triisopropanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 60% fillers or clinker substitutes. The triisopropanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.Type: GrantFiled: October 6, 1989Date of Patent: July 24, 1990Assignee: W. R. Grace & Co.-Conn.Inventors: Ellis M. Gartner, David F. Myers, James M. Gaidis
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Patent number: 4939191Abstract: A cured cement article containing therein an organic polymer treated with an isocyanate compound has a high flexural strength and high water resistance. The cured cement can be prepared by impregnating a cured cement article containing therein a water-soluble polymer or a water-dispersible polymer with an isocyanate compound.Type: GrantFiled: February 17, 1988Date of Patent: July 3, 1990Assignee: UBE Industries, Ltd.Inventors: Nobuhiro Kataoka, Hideaki Igarashi, Masanori Ohshima