Patents Assigned to Degussa Corporation
-
Publication number: 20130171261Abstract: Disclosed herein are process for preparing cyclic esters comprising unsaturated functional groups. Also disclosed are copolymers prepared from the cyclic esters. The copolymers can be used to form microparticles, polymer micelles, etc., which are useful in drug delivery applications.Type: ApplicationFiled: February 15, 2013Publication date: July 4, 2013Applicant: Evonik Degussa CorporationInventors: Peter Markland, Xi Zhang
-
Patent number: 8399686Abstract: Disclosed herein are process for preparing cyclic esters comprising unsaturated functional groups. Also disclosed are copolymers prepared from the cyclic esters. The copolymers can be used to form microparticles, polymer micelles, etc., which are useful in drug delivery applications.Type: GrantFiled: December 15, 2010Date of Patent: March 19, 2013Assignee: Evonik Degussa CorporationInventors: Peter Markland, Xi Zhang
-
Patent number: 8367752Abstract: New gel coat composition, in particular new marine gel coat compositions, a process for their manufacture as well as their use to coat surfaces of articles exposed to light, water and solvents. The gel coats incorporate a precipitated silica having A BET surface of from 150 to 250 m2/g A SiO2 content of more than or equal to 98.5% by weight A Na2O content of less than or equal to 0.5% by weight.Type: GrantFiled: February 4, 2011Date of Patent: February 5, 2013Assignee: Evonik Degussa CorporationInventors: James Toth, Matt Romaine
-
Patent number: 8114486Abstract: Coated substrates are made from colored paper coated with a coating comprising silica or fumed metal oxide, such as precipitated silica, colloidal silica, fumed silica or fumed metal oxide. An opaque coating is formed which improves the L* and b* values of the colored paper. Images printed onto the paper show improved characteristics, such as a reduction in wick or bleed, or an improved color gamut.Type: GrantFiled: February 27, 2007Date of Patent: February 14, 2012Assignee: Evonik Degussa CorporationInventor: Leo M. Nelli
-
Patent number: 8087450Abstract: Investment casting shells are manufactured by incorporating fumed metal oxide dispersions, or doped fumed metal oxides as a binder into the casting shell. The investment casting shells containing the fumed metal oxides have improved characteristics, such as increased strength and a reduced surface roughness.Type: GrantFiled: January 29, 2008Date of Patent: January 3, 2012Assignee: Evonik Degussa CorporationInventors: Shawn Nycz, Robert Johnson, Fred Klaessig
-
Patent number: 7985292Abstract: A precipitated silica having a d50-value of from 150 to 2000 nm, a d90-value of from 500 to 7000 nm, a silanol group density of from 2.5 to 8 OH/nm2, and a modified tapped density of less than or equal to 70 g/l is useful for thickening and providing thixotropy in liquid systems and shows superior efficiency at thickening and creating thixotropy compared to existing grades of precipitated silica. The precipitated silica functions best as a thixotrope in non-polar or intermediate polar liquid systems such as unsaturated polyester (UPE) resin systems.Type: GrantFiled: November 26, 2007Date of Patent: July 26, 2011Assignee: Evonik Degussa CorporationInventors: Christian Panz, Karl Meier, James Toth, Guido Titz, Matt Romaine, Mario Scholz
-
Publication number: 20110123750Abstract: New gel coat composition, in particular new marine gel coat compositions, a process for their manufacture as well as their use to coat surfaces of articles exposed to light, water and solvents. The gel coats incorporate a precipitated silica having A BET surface of from 150 to 250 m2/g A SiO2 content of more than or equal to 98.5% by weight A Na2O content of less than or equal to 0.5% by weight.Type: ApplicationFiled: February 4, 2011Publication date: May 26, 2011Applicant: Degussa CorporationInventors: James TOTH, Matt ROMAINE
-
Patent number: 7820031Abstract: The present disclosure is directed to a multi-stage system and a process utilizing said system with the design of reducing the sulfur-content in a liquid comprising hydrocarbons and organosulfur compounds. The process comprising at least one of the following states: (1) an oxidation stage; (2) an extraction state; (3) a raffinate washing stage; (4) a raffinate polishing stage; (5) a solvent recovery stage; (6) a solvent purification stage; and (7) a hydrocarbon recovery stage. The process for removing sulfur-containing hydrocarbons from gas oil, which comprises oxidizing gas oil comprising hydrocarbons and organosulfur compounds to obtain a product gas oil.Type: GrantFiled: October 20, 2004Date of Patent: October 26, 2010Assignee: Degussa CorporationInventors: Robert N. D'Alessandro, John Tarabocchia, Jerald Andrew Jones, Steven E. Bonde, Stefan Leininger
-
Publication number: 20090191285Abstract: A moisturizing liquid liner composition comprising a hydrophobic moiety and an emulsifier is described. Further, a substrate comprising a barrier layer and a moisturizing liquid liner composition comprising a hydrophobic moiety and an emulsifier is described. The substrate may be incorporated into an article.Type: ApplicationFiled: January 30, 2008Publication date: July 30, 2009Applicant: Evonik Degussa CorporationInventors: Anna HOWE, Dana Adkins, Scott W. Wenzel, David William Koenig, Douglas R. Hoffman
-
Publication number: 20090136672Abstract: A precipitated silica having a d50-value of from 150 to 2000 nm, a d90-value of from 500 to 7000 nm, a silanol group density of from 2.5 to 8 OH/nm2, and a modified tapped density of less than or equal to 70 g/l is useful for thickening and providing thixotropy in liquid systems and shows superior efficiency at thickening and creating thixotropy compared to existing grades of precipitated silica. The precipitated silica functions best as a thixotrope in non-polar or intermediate polar liquid systems such as unsaturated polyester (UPE) resin systems.Type: ApplicationFiled: November 26, 2007Publication date: May 28, 2009Applicant: Evonik Degussa CorporationInventors: Christian Panz, Karl Meier, James Toth, Guido Titz, Matt Romaine, Mario Scholz
-
Publication number: 20090022998Abstract: New gel coat composition, in particular new marine gel coat compositions, a process for their manufacture as well as their use to coat surfaces of articles exposed to light, water and solvents. The gel coats incorporate a precipitated silica having A BET surface of from 150 to 250 M2/g A SiO2 content of more than or equal to 98.5% by weight A Na2O content of less than or equal to 0.5% by weight.Type: ApplicationFiled: July 20, 2007Publication date: January 22, 2009Applicant: Degussa CorporationInventors: James Toth, Matt Romaine
-
Publication number: 20080075869Abstract: Coated substrates include a substrate coated with a coating composition comprising a metal oxide, a binder and optionally a mordant and a crosslinker for the binder. The substrate may be paper, such as commodity paper, and the metal oxide may be a fumed metal oxide or a colloidal metal oxide. The coating may be non-glossy and may be applied at a low coat weight. Methods for making coated substrates are also disclosed. The coating may be applied to the substrate during manufacture of the substrate, for example the coating may be applied to paper using a size-press machine during its manufacture.Type: ApplicationFiled: March 30, 2007Publication date: March 27, 2008Applicant: DEGUSSA CORPORATIONInventor: Leo M. Nelli
-
Publication number: 20070221538Abstract: The present disclosure is directed to a multi-stage system and a process utilizing said system with the design of reducing the sulfur-content in a liquid comprising hydrocarbons and organosulfur compounds. The process comprising at least one of the following states: (1) an oxidation stage; (2) an extraction state; (3) a raffinate washing stage; (4) a raffinate polishing stage; (5) a solvent recovery stage; (6) a solvent purification stage; and (7) a hydrocarbon recovery stage. The process for removing sulfur-containing hydrocarbons from gas oil, which comprises oxidizing gas oil comprising hydrocarbons and organosulfur compounds to obtain a product gas oil.Type: ApplicationFiled: October 20, 2004Publication date: September 27, 2007Applicant: Degussa CorporationInventors: Robert D'Alessandro, John Tarabocchia, Jerald Jones, Steve Bonde, Stefan Leininger
-
Publication number: 20070202281Abstract: Coated substrates are made from colored paper coated with a coating comprising silica or fumed metal oxide, such as precipitated silica, colloidal silica, fumed silica or fumed metal oxide. An opaque coating is formed which improves the L* and b* values of the colored paper. Images printed onto the paper show improved characteristics, such as a reduction in wick or bleed, or an improved color gamut.Type: ApplicationFiled: February 27, 2007Publication date: August 30, 2007Applicant: DEGUSSA CORPORATIONInventor: Leo Nelli
-
Patent number: 6399039Abstract: Chlorine dioxide is generated from an aqueous solution of sodium chlorite in the presence of a catalyst having a reduced rate of deactivation. The catalyst is preferably palladium, or palladium together with another platinum group metal (e.g., Pd+Pt), or palladium together with a Group IB metal (e.g., Pd+Au) deposited on a support modified by Group IA carbonate salt (e.g., K2CO3) or a Group IIA carbonate salt (e.g., CaCO3) or a magnesium salt that can be converted to MgO or a support consisting of a Group IA carbonate salt or a Group IIA carbonate salt or a magnesium salt that can be converted to MgO.Type: GrantFiled: January 24, 2001Date of Patent: June 4, 2002Assignee: Degussa CorporationInventor: Daniel Ostgard
-
Patent number: 6265343Abstract: Chlorine dioxide is generated from an aqueous solution of sodium chlorite in the presence of a catalyst having a reduced rate of deactivation. The catalyst is preferably palladium, or palladium together with another platinum group metal (e.g., Pd+Pt), or palladium together with a Group IB metal (e.g., Pd+Au) deposited on a support modified by Group IA carbonate salt (e.g., K2CO3) or a Group IIA carbonate salt (e.g., CaCO3) or a magnesium salt that can be converted to MgO or a support consisting of a Group IA carbonate salt or a Group IIA carbonate salt or a magnesium salt that can be converted to MgO.Type: GrantFiled: March 7, 1994Date of Patent: July 24, 2001Assignee: Degussa CorporationInventors: Francis Patrick Daly, Daniel Ostgard
-
Patent number: 6193795Abstract: A method of producing a low structure pyrogenic metal oxide filler is disclosed. The method involves subjecting pyrogenically produced metal oxide agglomerates and aggregates selected from silicon oxide, aluminum oxide, zirconium oxide, or titanium oxide to a dry milling process whereby the pyrogenically produced metal oxide is contacted in an agitating zone with an energy specific force.Type: GrantFiled: April 29, 1994Date of Patent: February 27, 2001Assignee: Degussa CorporationInventors: Maria R. Nargiello, Gary J. Bush, Sturgis G. Allen
-
Patent number: 6180080Abstract: A process for the removal of thiosulphate from spent Stretford solution, The process comprises adjusting the spent Stretford solution to an acidic pH, preferably in the range of 1 to 3, and adding a peroxygen compound. The process allows the user to recycle spent Stretford solution in a cost effective manner by taking advantage of previously unknown buffering properties in the solution.Type: GrantFiled: May 14, 1997Date of Patent: January 30, 2001Assignee: Degussa CorporationInventors: Christopher R. Proulx, Marioara V. Ionila
-
Patent number: 6005129Abstract: After a solution of chloropropyltriethoxysilane and sodium thiocyanate react in ethanol to form a thiocyanatopropyltriethoxysilane suspension, salt resulting from the reacting step is removed from the ethanol-containing centrifugate and washed. The first embodiment for manufacturing thiocyanatopropyltriethoxysilane includes adding the wash ethanol to the solution in the reacting step, distilling the centrifugate to remove ethanol, and removing solids from a thiocyanatopropyltriethoxysilane residue resulting from the distilling step. The ethanol from the distilling step may be used to wash the salt separated in the centrifugating step.Type: GrantFiled: February 9, 1999Date of Patent: December 21, 1999Assignee: Degussa CorporationInventors: Helmut W. Droge, Hui-Li Yang
-
Patent number: 5928405Abstract: An economical process and associated hardware for commercial manufacture of controllable submicrometer size metallic powders for electronic and other applications. The method is based on the preparation of a stable high concentration precursor solution, production of a high density aerosol mist of the precursor solutions, selection of mist droplets with upper and lower size bounds, controlled drying of the droplets, their conversion to metallic powder in a high temperature gaseous atmosphere and the separation of the powders from carrier gases without significant loss inside the process hardware.Type: GrantFiled: May 21, 1997Date of Patent: July 27, 1999Assignees: Degussa Corporation, Particle Technology, Inc.Inventors: Madhav B. Ranade, Dan V. Goia, Geoffrey J. Varga, Bernard W. Gamson, John Bara