Patents by Inventor Robert C. Brady, III

Robert C. Brady, III has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for gas-phase polymerization having high bed bulk density
    Patent number: 10647790
    Abstract: The present invention relates to an improvement for gas-phase olefin polymerization process having relatively high bed bulk density. The improvement involves the use of mixed external electron donors when polymerizing propylene in a gas-phase reactor having a polymer bed with a bulk density greater than 128 kg/m3, optionally with one or more comonomers, wherein the mixed electron donor system comprises at least a first external electron donor and a second external electron donor, and wherein the first external electron donor is a carboxylate compound.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: May 12, 2020
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ping Cai, Jan W. Van Egmond, Matthew J. Fedec, Jeffrey D. Goad, Robert C. Brady, III, Linfeng Chen
  • PROCESS FOR GAS-PHASE POLYMERIZATION HAVING HIGH BED BULK DENSITY
    Publication number: 20130005923
    Abstract: The present invention relates to an improvement for gas-phase olefin polymerization process having relatively high bed bulk density. The improvement involves the use of mixed external electron donors when polymerizing propylene in a gas-phase reactor having a polymer bed with a bulk density greater than 128 kg/m3, optionally with one or more comonomers, wherein the mixed electron donor system comprises at least a first external electron donor and a second external electron donor, and wherein the first external electron donor is a carboxylate compound.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 3, 2013
    Applicant: Dow Global Technologies LLC
    Inventors: Ping Cai, Jan W. Van Egmond, Matthew J. Fedec, Jeffrey D. Goad, Robert C. Brady, III, Linfeng Chen
  • Gas phase polymerization reactions utilizing soluble unsupported catalysts
    Patent number: 5317036
    Abstract: Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: May 31, 1994
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Robert C. Brady, III, Frederick J. Karol, Timothy R. Lynn, Robert J. Jorgensen, Sun-Chueh Kao, Eric P. Wasserman
  • Use of methylene-bridged derivatives of cyclopentadienyl dicarbollide complexes of titanium, zirconium and hafnium as polymerization catalysts
    Patent number: 5162466
    Abstract: Methylene bridged derivatives of novel cyclopentadienyl dicarbollide complexes of titanium, zirconium and hafnium display high activity as ethylene polymerization catalysts in the absence of a cocatalyst.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: November 10, 1992
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Frederick J. Karol, Sun-Chueh Kao, Robert C. Brady, III
  • Process for the production of polyethylene
    Patent number: 5102841
    Abstract: A process for the production of polyethylene comprising contacting ethylene or a mixture comprising ethylene and one or more alpha-olefins and, optionally, one or more diolefins, under polymerization conditions, with a catalyst system comprising:(a) a particulate catalyst precursor based on titanium or vanadium;(b) polypropylene support particles to which the catalyst precursor particles are bonded; and(c) a hydrocarbyl aluminum cocatalyst.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: April 7, 1992
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Kevin J. Cann, Robert C. Brady, III, Yimsan Gau
  • Process for producing stereoregular polymers having a narrow molecular weight distribution
    Patent number: 5093415
    Abstract: Stereoregular polymers having a molecular weight distribution of less than 5.0 and an isotactic index in excess of 96 percent are produced by polymerizing an alpha-olefin having 3 to 8 carbon atoms in a low pressure gas phase fluid bed process at a temperature in excess of 80.degree. C. employing a heat stable catalyst system comprising (a) a solid catalyst component containing magnesium, titanium, halide and a polycarboxylic acid ester containing two coplanar ester groups attached to adjacent carbon atoms, as inside electron donor, (b) an organoaluminum cocatalyst, and (c) a silicon compound containing a silicon-oxygen-carbon linkage, as outside electron donor.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: March 3, 1992
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Robert C. Brady, III, Francis G. Stakem, Han T. Liu, Allen Noshay