Patents Assigned to W. R. Grace & Co.-Conn.
  • Patent number: 8821630
    Abstract: 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: Grant
    Filed: May 6, 2011
    Date of Patent: September 2, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Lawrence L. Kuo, Izabela Goc-Maciejewska, Romain Faivre
  • Publication number: 20140243188
    Abstract: Alumina binder obtained from aluminum sulfate, the process of preparing the binder and the process of using the binder to prepare catalyst compositions are disclosed. Catalytic cracking catalyst compositions, in particularly, fluid catalytic cracking catalyst composition comprising zeolites, optionally clay and matrix materials bound by an alumina binder obtained from aluminum sulfate are disclosed.
    Type: Application
    Filed: May 5, 2014
    Publication date: August 28, 2014
    Applicant: W. R. GRACE & CO.-CONN.
    Inventor: Ranjit KUMAR
  • Patent number: 8815009
    Abstract: The present invention provides a method for making sand compositions wherein manufactured sand particles are pretreated with a clay-mitigating polycation and blended with natural sand particles that have washed to remove fines such that at least 90% of the natural sand particles are retained on a 75 micron sieve. Methods of the invention also involve the use of the blended pretreated sand for making concrete wherein the sand is combined with cement, a polycarboxylate type dispersant, a further amount of clay-mitigating polycation compound, and at least one hydryoxyl or hydroxyl carboxylic acid or salt compound.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: August 26, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Arthur Kyriazis, Bruce Perry, Eric Koehler, Leon Bablouzian
  • Patent number: 8778826
    Abstract: Disclosed herein are processes for preparing procatalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions improve catalyst selectivity and also increase the bulk density of the formant polymer.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: July 15, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Kelly Gonzalez, Clark C. Williams, Linfeng Chen
  • Patent number: 8764272
    Abstract: The invention provides ‘thixotropy’ monitoring, by measuring the reversible, time-dependent reduction in viscosity occurring when concrete is subjected to mixing, and employs a mixing drum and conventional slump monitoring equipment as used on ready-mix trucks. In one embodiment, the drum is rotated until concrete is completely mixed; the speed is altered, such as by increasing it to a predetermined level; and the energy required to rotate the drum (ER) is monitored; the maximum (ER-MAX) and minimum (ER-MIN) values are recorded in computer memory; and these values are compared to pre-determined (target) values. Rheology factors (including viscosity, yield stress, and/or thixotropy) can be adjusted accordingly by adding liquid component(s) into the mix. This method, suitable for delivery of highly fluid concrete speed such as SCC, can involve transit and placement rheology targets during monitoring.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: July 1, 2014
    Assignee: W. R. Grace & Co., -Conn.
    Inventors: Kati Hazrati, Ara A. Jeknavorian, Eric Koehler
  • Patent number: 8764273
    Abstract: The invention relates to a method and system for monitoring and adjusting both air content and rheology (e.g., slump, slump flow) properties of a hydratable concrete mix contained within a concrete mixer. The system simultaneously tracks dosage of both rheology-modifying admixture (e.g., polycarboxylate polymer cement dispersant) and air control agent or “ACA” (e.g., air entraining agent) by reference to at least four nominal dose response (“NDR”) curves or profiles, which at least four NDR profiles are based on the respective behaviors of each of the ACA and rheology-modifying agent on air content and rheology.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: July 1, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Eric Koehler, Mark F. Roberts
  • Patent number: 8758504
    Abstract: The present invention provides cement grinding additive compositions and methods which allow a powerful, robust defoamer to be uniformly dispersed throughout a broad concentration range while retaining storage stability even in cases wherein the defoamer is highly diluted. Exemplary cement grinding additive compositions comprise at least one amine cement grinding additive; a tri-iso-butylphosphate defoamer; a biopolymer polysaccharide gum selected from the group comprising Diutan, Whelan, Xanthan, or mixtures thereof; and water in the amount of 0.10 to 95.0 percent based on total weight of composition. Methods for manufacturing cement using the cement grinding additive compositions are also described.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: June 24, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Leslie A. Jardine, Josephine H. Cheung
  • Patent number: 8759423
    Abstract: The present invention discloses additive compositions, cementitious compositions, and methods for controlling air in cementitious compositions in which colloidal nano-particles are used for stabilizing a water-dispersible defoamer within a cement-dispersant-containing aqueous additive formulation for modifying hydratable cementitious compositions such as cement or concrete.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: June 24, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ying Chen, Lawrence L. Kuo, Ara A. Jeknavorian
  • Patent number: 8748528
    Abstract: Disclosed is a coating composition that includes an aqueous emulsion of a hydrophobic acrylic polymer, a water-soluble polymer, and an inorganic filler, and further includes a freezing-point lowering component to permit low temperature application. The freezing-point lowering component will preferably include a water-soluble, corrosion inhibiting salt. The coating composition will also optionally and preferably include an evaporation enhancing component to promote faster drying and skin formation at low temperatures. The coating composition may be coated onto a construction surface (e.g., by spraying) where, after drying, it will form a fully adhered barrier membrane that is water-vapor permeable, but air and liquid-water impermeable. Such membrane will preferably have sufficient coating thickness and sufficiently high elongation that it will bridge joints and cracks.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: June 10, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Xia Cao, Robert A. Wiercinski, Neal S. Berke, Antonio J. Aldykiewicz, Jr., Jyoti Seth
  • Patent number: 8735635
    Abstract: This invention is a process for making 1,2-propane diol from glycerol. The process comprises subjecting a glycerol stream to hydrogenation conditions in the presence of a transition metal promoted skeletal copper catalyst to enhance selective production of 1,2-propane diol product. Chromium promoted catalyst is preferred for this invention, and moreover, it is preferred that the skeletal copper catalyst is prepared from copper aluminum alloys that have been subjected to leaching conditions selected to achieve at least 40% leaching of aluminum from the alloy. This process is particularly conducive to conducting the hydrogenation with reactant mixture in the liquid phase. The catalysts used in this invention are particularly suitable for use in a fixed catalyst bed, but can be activated and sized so that the catalyst is also suitable for use in slurry based reactions.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: May 27, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Stephen Raymond Schmidt
  • Patent number: 8714177
    Abstract: A system is adapted to automatically maintain a desired yield level for a slurry flow. Measurements of the electrical conductivity of a slurry are taken and corrected for the effects of temperature and pressure. The corrected conductivity measurements are used to arrive at a value for system yield. The system automatically determines if the yield is too high or too low relative to a desired level, and controls the rate at which accelerator is added to the slurry in order to increase or decrease yield.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: May 6, 2014
    Assignee: W.R. Grace & Co. -Conn.
    Inventors: Dennis M. Hilton, Karl Taub, Keith Lipford, Philip A. Zanghi
  • Patent number: 8713879
    Abstract: Disclosed is a waterproofing membrane that bonds to concrete cast against it (i.e., post-cast concrete). The membrane includes a flexible carrier sheet, a pressure sensitive adhesive, and reflective particles on the surface of the adhesive. The reflective particles should have an average diameter equal to or greater than the thickness of the pressure sensitive adhesive. Preferably, the reflective particles are ground white cement or ground white hydrated cement. The membrane does not have a removable release sheet that is typically used to prevent the adhesive portion of the membrane from adhering to the carrier sheet or other portion of the membrane when the membrane is rolled up.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: May 6, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert A. Wiercinski, Hongmei Ding, Xia Cao
  • Patent number: 8697827
    Abstract: Disclosed herein are procatalyst compositions, catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions contain a halo-malonate and a 2-fluoro-malonate in particular. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and also improve hydrogen response during polymerization. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 50 g/10 min.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: April 15, 2014
    Assignee: W. R. Grace & Co.-Conn
    Inventors: Linfeng Chen, Tak W. Leung, Tao Tao
  • Patent number: 8685156
    Abstract: 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: Grant
    Filed: July 10, 2009
    Date of Patent: April 1, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Hideo Koyata, Shuqiang Zhang, Byong-wa Chun
  • Patent number: 8673806
    Abstract: The invention concerns catalysts comprising (i) a cladded catalyst support comprising (a) a core which comprises alumina particles and (b) about 1 to about 40 weight percent silica cladding, based on the weight of the cladded catalyst support, on the surface of the core; the catalyst support having a BET surface area of greater than 20 m2/g and a porosity of at least about 0.2 cc/g; and (ii) 0.1 to 10 weight percent, based on the weight of the catalyst, of catalytically active transition metal on the surface of the cladded catalyst support; wherein the catalyst support has a normalized sulfur uptake (NSU) of up to 25 ?g/m2. The invention also concerns the production and use of such catalysts.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: March 18, 2014
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Stephen R. Schmidt, David M. Chapman, Manoj M. Koranne, Michael D. Jensen
  • Patent number: 8642499
    Abstract: A particulate catalytic cracking catalyst which comprises a zeolite having catalytic cracking ability under catalytic cracking conditions, added silica, precipitated alumina and, optionally clay. The catalytic cracking catalyst has a high matrix surface area and is useful in a catalytic cracking process, in particularly, a fluid catalytic cracking process, to improve bottoms conversion at a constant coke formation.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: February 4, 2014
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Wu-Cheng Cheng, Kevin John Sutovich, Ruizhong Hu, Ranjit Kumar, Xinjin Zhao
  • Publication number: 20140021098
    Abstract: Particulate catalytic cracking catalysts which comprise a zeolite having catalytic cracking ability under catalytic cracking conditions, added silica, a magnesium salt, an alumina containing binder, clay and optionally, a matrix material. The catalytic cracking catalyst has a high matrix surface area and is useful in a catalytic cracking process, in particularly, a fluid catalytic cracking process, to provide increased catalytic activity and improved coke and hydrogen selectivity without the need to incorporate rare earth metals.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 23, 2014
    Applicant: W. R. GRACE & CO.-CONN.
    Inventors: Ranjit KUMAR, Wu-Cheng Cheng, Kevin J. Sutovich, Michael S. Ziebarth, Yuying Shu
  • Publication number: 20140021097
    Abstract: A rare earth free particulate catalytic cracking catalyst which comprises a zeolite having catalytic cracking ability under catalytic cracking conditions, an acidified silica sol binder, magnesium salt, clay and a matrix material. The catalytic cracking catalyst has a high matrix surface area and is useful in a catalytic cracking process, in particularly, a fluid catalytic cracking process, to provide increased catalytic activity and improved hydrogen and coke selectivity without the need to incorporate rare earth metals.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 23, 2014
    Applicant: W. R. GRACE & CO.-CONN.
    Inventors: Kevin J. SUTOVICH, Wu-Cheng CHENG, Ranjit KUMAR, Michael S. ZIEBARTH, Yuying SHU
  • Patent number: 8616153
    Abstract: Method and device for ensuring high yields during spraying of a settable slurry composition. The slurry is conveyed through a length of hose to a nozzle spray-orifice, and a set accelerator is introduced into the slurry at a distance “D” from the nozzle spray-orifice. The level of accelerator is monitored using a sensor located in the slurry path at a point after the set accelerator is injected. A preferred sensor comprises two pairs of conductivity sensors each having an annular body with a bore corresponding to the diameter of the hose or nozzle bore. Voltage of the slurry can be correlated to yields obtained when a salt-based accelerator fluid is injected into the slurry, such that levels of accelerator can be finely adjusted, and consistently high yields of spray coatings can be achieved.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: December 31, 2013
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Michael Abbott, Dennis M. Hilton, Keith Lipford, Karl Taub
  • Patent number: 8609213
    Abstract: Disclosed are waterproofing membranes comprising the following laminated layers: layer A comprising a waterproofing adhesive; layer B comprising a carrier sheet; layer C comprising a releasable bonding material; and layer D comprising a protective coating; wherein (i) the laminated layers are arranged in the sequential order A-B-C-D; or (ii) the laminated layers are arranged in the sequential order B-C-D-A; or (iii) the laminated layers are arranged in the sequential order C-D-A-B. The membrane does not include a removable release sheet that is typically used to prevent the adhesive from adhering to the carrier sheet or other portion of the membrane when the membrane is rolled up. Also disclosed is a method of making the aforementioned membrane. Preferably, layer C will comprise a water soluble polymer, an alkali soluble polymer, or a homopolymer or copolymer of polyvinyl acetate.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: December 17, 2013
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Robert A. Wiercinski, Anandakumar Ranganathan