Patents by Inventor Daniel H. Craig

Daniel H. Craig 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).

  • Patent number: 8951607
    Abstract: Simplified and improved processes are provided for manufacturing titanium dioxide pigments including a surface treatment whereby a plurality of inorganic oxides or a combination of one or more inorganic oxides with one or more inorganic phosphates are applied to a titanium dioxide base pigment. Aqueous acid-soluble sources of the desired inorganic oxides and/or phosphates are predissolved in an aqueous acid, and these can be added on a batch wise or more preferably on a continuous basis to an alkaline slurry containing the titanium dioxide base pigment and to which aqueous alkaline-soluble sources of the desired inorganic oxides are being or have been added previously. Co-precipitation of the oxides and/or oxides and phosphates is then accomplished by an adjustment of the pH, to provide a surface treated pigment with excellent homogeneity of the deposited mixed oxides and/or oxides and phosphates.
    Type: Grant
    Filed: May 3, 2007
    Date of Patent: February 10, 2015
    Assignee: Tronox, LLC
    Inventors: Daniel H. Craig, Venkata Rama Rao Goparaju
  • Publication number: 20080271642
    Abstract: Simplified and improved processes are provided for manufacturing titanium dioxide pigments including a surface treatment whereby a plurality of inorganic oxides or a combination of one or more inorganic oxides with one or more inorganic phosphates are applied to a titanium dioxide base pigment. Aqueous acid-soluble sources of the desired inorganic oxides and/or phosphates are predissolved in an aqueous acid, and these can be added on a batch wise or more preferably on a continuous basis to an alkaline slurry containing the titanium dioxide base pigment and to which aqueous alkaline-soluble sources of the desired inorganic oxides are being or have been added previously. Co-precipitation of the oxides and/or oxides and phosphates is then accomplished by an adjustment of the pH, to provide a surface treated pigment with excellent homogeneity of the deposited mixed oxides and/or oxides and phosphates.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 6, 2008
    Inventors: Daniel H. Craig, Venkata Rama Rao Goparaju
  • Publication number: 20080053336
    Abstract: The present invention concerns aqueous coating systems, providing an aqueous coating composition which comprises water, a film-forming component and at least one inorganic pigment surface treated with one or more organosilicon compounds from the alkyltrialkoxysilanes, the dialkyldialkoxysilanes and mixtures, oligomers, and copolymers of the alkyltrialkoxysilanes and dialkyldialkoxysilanes, wherein the alkyl groups contain from three to six carbon atoms and optionally contain an oxygen atom or contain fluorine and/or chlorine heteroatoms. By controlling and limiting the amounts used of these organosilicon surface treatments, the dispersibility of a conventionally hydrophilic inorganic pigment such as titanium dioxide is not materially adversely affected, but improvements are at the same time afforded in terms of the compatibility of the pigment with the film-forming component, as demonstrated by improved tint strength and gloss properties in a paint composition.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 6, 2008
    Inventors: Daniel H. Craig, Jeffrey D. Elliott, Michael E. Kidder, George A. Perakis, Harmon E. Ray, Mark D. Westmeyer
  • Patent number: 7250080
    Abstract: An improved process for making an organosilicon compound surface-treated titanium dioxide material, comprising (a) forming a mixture of the titanium dioxide material in water, (b) wet milling the mixture, (c) adjusting the pH of the slurry resulting from step (b) to between about 5.0 and about 8.5, (d) after step (c), removing the titanium dioxide material from the mixture by vacuum or pressure filtration, (e) after step (d), washing the titanium dioxide material so removed, (f) after step (e), converting the washed titanium dioxide material to a fluid dispersion having a pH of from about 3.5 to less than about 7 via addition of a fluidizing agent comprising a water-soluble monoprotic acid, (g) after, or concurrently with, step (f), adding to the resulting dispersion of titanium dioxide material an organosilicon compound, with mixing, and (h) spray drying the dispersion of the washed titanium dioxide material resulting from step (g) to yield a dry titanium dioxide pigment powder.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: July 31, 2007
    Assignee: Tronox LLC
    Inventors: Daniel H. Craig, Mark D. Westmeyer
  • Patent number: 7238231
    Abstract: An improved process is described for manufacturing zirconia-treated titanium dioxide pigments, wherein the zirconia treatment is accomplished in the process of fluidizing a titanium dioxide filter or press cake and then drying the same, through the addition to the filter or press cake of one or more alkaline water-soluble zirconium reagents selected from ammonium zirconyl carbonate, the water-soluble ammonium zirconyl carboxylates and mixtures of these. Aqueous solutions of such zirconium reagents, in addition to being effective for imparting a zirconia surface treatment to the titanium dioxide materials, also prove to be effective fluidizing agents for forming high solids dispersions of the zirconia-treated titanium dioxide pigment materials which can be spray dried without substantial dilution and excessive energy requirements.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: July 3, 2007
    Assignee: Tronox LLC
    Inventors: Daniel H. Craig, Jeffrey D. Elliott, Harmon E. Ray
  • Patent number: 7138011
    Abstract: Inorganic pigments treated with at least one N,N,N-trialkyl quaternary amino acid inner salt possess improved processibility and dispersibility in thermoplastic materials, and impart improved properties to thermoplastic compositions containing said surface-treated pigments.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: November 21, 2006
    Assignee: Tronox LLC
    Inventor: Daniel H. Craig
  • Patent number: 7011703
    Abstract: Inorganic pigments, having deposited on the pigment surface at least one alkenyl- or alkyl-substituted succinic anhydride and at least one organic polyol, possess improved processibility and dispersibility in thermoplastic materials, and impart improved properties to thermoplastic compositions containing said surface-treated pigments.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: March 14, 2006
    Assignee: Kerr-McGee Chemical LLC
    Inventor: Daniel H. Craig
  • Patent number: 6958091
    Abstract: Inorganic pigments treated with at least one amide of a fatty acid and an aliphatic amine possess improved processibility and dispersibility in thermoplastic materials, and impart improved properties to thermoplastic compositions containing said surface-treated pigments.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: October 25, 2005
    Assignee: Kerr-McGee Chemical LLC
    Inventor: Daniel H. Craig
  • Patent number: 6946028
    Abstract: Inorganic pigments treated with one or more of the ?,?-dialkyl substituted linear or branched carboxylic acids and the salts thereof possess improved processibility and dispersibility in thermoplastic materials, and impart improved properties to thermoplastic compositions containing said surface-treated pigments.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: September 20, 2005
    Assignee: Kerr-McGee Chemical LLC
    Inventor: Daniel H. Craig
  • Patent number: 6156112
    Abstract: This invention relates to high solids aqueous dispersions of reactive hydrophobizing agents, to methods of preparation of such dispersions, and to aqueous blends of such dispersions with a variety of other aqueous dispersions or solutions, including synthetic resin emulsions, wherein the aqueous dispersions of reactive hydrophobizing agents are prepared in the presence of a water-soluble protective colloid in combination with a solid water-insoluble anhydride compound. The dispersions of this invention efficiently impart hydrophobic characteristics to the surfaces and interfaces of materials onto which they are applied and unexpectedly exhibit very high stability to storage and handling conditions found in industry.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: December 5, 2000
    Inventor: Daniel H. Craig
  • Patent number: 6123753
    Abstract: Stable aqueous dispersions of organo-soluble multivalent ion salts of sulfonate group-containing compounds can be prepared in the presence of surface-active water-soluble alkyl hydroxyalkyl polysaccharides. These aqueous dispersions unexpectedly achieve high levels of storage stability at organo-soluble multivalent ion, sulfonate group-containing salt concentrations of up to 65% or greater, by weight based on total dispersion. The dispersions impart hydrophobic characteristics to the surfaces of materials onto which they are applied, are stable to storage, are compatible with a variety of other aqueous systems when blended therewith, and are useful as coatings designed for metal surfaces or as components of coatings designed for metal surfaces.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: September 26, 2000
    Inventor: Daniel H. Craig
  • Patent number: 5403392
    Abstract: Stable high solids aqueous dispersions of hydrophobizing agents can be prepared utilizing plant glycosides as the primary dispersion stabilizer and, optionally, secondary dispersion stabilizers. These dispersions impart water repellent characteristics when applied to the interfaces and surfaces of materials, and are compatible when blended with synthetic resin emulsions.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: April 4, 1995
    Assignee: Ennis Herder, Inc.
    Inventor: Daniel H. Craig
  • Patent number: 5130367
    Abstract: Acrylate copolymers comprising (a) repeating units derived from at least one acrylic or methacrylic ester and, by weight of the total copolymer, (b) about 0.1 to 3% of repeating units derived from at least one water-soluble monomer possessing conjugated unsaturation and (c) about 0.1 to 3% of repeating units derived from at least one water-soluble allyl monomer; aqueous polyacrylate dispersions comprising such polymers; and a process of preparing the same. Optionally, the copolymers contain other free-radical polymerizable monomers.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: July 14, 1992
    Assignee: Hercules Incorporated
    Inventors: Daniel H. Craig, Harry J. Goldy
  • Patent number: 4994537
    Abstract: Acrylate copolymers comprising (a) repeating units derived from at least one acrylic or methacrylic ester and, by weight of the total copolymer, (b) about 0.1 to 3% of repeating units derived from at least one water-soluble monomer possessing conjugated unsaturation and (c) about 0.1 to 3% of repeating units derived from at least one water-soluble allyl monomer; aqueous polyacrylate dispersions comprising such polymers; and a process of preparing the same. Optionally, the copolymers contain other free-radical polymerizable monomers.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: February 19, 1991
    Assignee: Hercules Incorporated
    Inventors: Daniel H. Craig, Harry J. Goldy
  • Patent number: 4966939
    Abstract: Disclosed are aqueous polyacrylate dispersions having improved rheological and stability characteristics prepared by the emulsion polymerization of acrylic esters, methacrylic esters and mixtures thereof in the absence of a protective colloid, wherein the improvement comprises conducting the polymerization in the presence of, by weight of the total monomer content, from about 0.1 to 2% of at least one substantially completely water-soluble monomer having conjugated unsaturation. The resultant aqueous polyacrylate dispersions are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coatings and water-borne adhesives, such as pressure-sensitive adhesives.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: October 30, 1990
    Assignee: Hercules Incorporated
    Inventor: Daniel H. Craig
  • Patent number: 4883850
    Abstract: A process for manufacture of polymers comprising suspension polymerization of at least one vinyl monomer in the presence of from about 0.01% to about 0.4% by weight, based on the total monomer content, of at least one hydrophobically modified water-soluble, nonionic cellulose ether polymer and an inert electrolyte, and polymers prepared by same.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: November 28, 1989
    Assignee: Aqualon Company
    Inventor: Daniel H. Craig
  • Patent number: 4868238
    Abstract: Suspension polymerization a vinyl monomer in the presence of from about 0.01 to 2.0%, by weight of the total monomer content, of a carboxymethyl hydrophobically modified water-soluble, nonionic cellulose either polymer alone or in combination with an inert electrolyte or inert polyelectrolyte is disclosed. The presence of the carboxymethyl hydrophobically modified water-soluble, nonionic cellulose ether polymer alone or in combination with an inert electrolyte or inert polyelectrolyte provides suspension polymer beads of narrower polydispersity and clarity, and results in minimal latex polymer (emulsion polymer) by-products.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: September 19, 1989
    Assignee: Aqualon Company
    Inventor: Daniel H. Craig
  • Patent number: 4801643
    Abstract: Disclosed are aqueous polyacrylate dispersions, i.e., aqueous latex dispersions of acrylate polymers, having improved rheological and stability characteristics, prepared by polymerization of acrylic esters, methacrylic esters and mixtures thereof in the presence of, by weight of the total monomer content, (a) from about 0.05 to about 5% of at least one non-surface active protective colloid, (b) from about 0.01 to 1% of at least one or more initiators selected from the group consisting of azo based initiators and organo-soluble, water-insoluble peroxide initiators, and (c) greater than 0.01% to about 0.05% of a water-soluble peroxide initiator. The resultant aqueous polyacrylate dispersions are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coatings and water-borne adhesives, such as pressure-sensitive adhesives.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: January 31, 1989
    Assignee: Hercules Incorporated
    Inventor: Daniel H. Craig
  • Patent number: 4684704
    Abstract: Disclosed are aqueous dispersions having improved rheological and stability characteristics prepared by the emulsion polymerization of low protective colloid grafting potential monomers in the presence of a hydrophobically modified hydroxyethyl cellulose. The resultant aqueous dispersions or latices are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coatings and water-borne adhesives, such as pressure-sensitive adhesives.
    Type: Grant
    Filed: June 19, 1986
    Date of Patent: August 4, 1987
    Assignee: Hercules Incorporated
    Inventor: Daniel H. Craig
  • Patent number: 4670505
    Abstract: Disclosed are aqueous polyacrylate dispersions having improved rheological and stability characteristics prepared by the emulsion polymerization of acrylic esters, methacrylic esters and mixtures thereof in the presence of, by weight of the total monomer content, (a) from about 0.1 to 5% of at least one water-soluble amino alcohol compound and (b) from about 0.05 to about 5% of at least one protective colloid. The resultant aqueous polyacrylate dispersions are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coatings and water-borne adhesives, such as pressure-sensitive adhesives.
    Type: Grant
    Filed: August 23, 1985
    Date of Patent: June 2, 1987
    Assignee: Hercules Incorporated
    Inventor: Daniel H. Craig