Patents Represented by Attorney William D. Bunch
  • Patent number: 6802966
    Abstract: The present invention relates to a solid and method useful in separating chemical components in a complex mixture when at least one of the chemical components of the mixture is capable of being selectively adsorbed. The solid of the present invention comprises an inorganic substance and moieties (R10) located on at least one surface of the inorganic substance, wherein said inorganic substance is an inorganic oxide and the surface moiety is selected from the group consisting of —CH2OH, —CH(OH)2, —CH(OH)CH3, —CH2CH2OH, —C(OH)2CH3, —CH2CH(OH)2 and —CH(OH)CH2(OH). Binding moiety, optionally attached to the inorganic substance via a linker, can also be located on the surface of the solid.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: October 12, 2004
    Assignee: W. R. Grace & Co. Conn.
    Inventor: Richard Franklin Wormsbecher
  • Patent number: 6780920
    Abstract: Formulations comprising novel porous metal oxide particles and binder are particularly suitable for ink receptive coatings, e.g., for ink jet papers and films. The metal oxide particles used in this application have a porous structure that differs significantly from the nonporous silica colloids. The particles have a median particle size in the range of about 0.05 to about 3 microns and porosity such that when an aqueous dispersion of the particles is dried at least 0.5 cc/g of pore volume is from pores having a pore size of 600 Å or less. The particles also have a viscosity derived pore volume of at least 0.5 cc/g. Formulations comprising particles having a zeta potential of +20 mV are also disclosed.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: August 24, 2004
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David Monroe Chapman, Demetrius Michos
  • Patent number: 6777481
    Abstract: The incorporation of waxes into thermoplastic adsorbent compositions enables the formation of high adsorbent loading compositions which have suitable flowability properties. The wax-containing thermoplastic adsorbent compositions are especially useful as thermoplastic adsorbent adhesives for use in desiccating interior compartments of insulating glass units.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: August 17, 2004
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Jia-Ni Chu
  • Patent number: 6770128
    Abstract: A matting agent composition comprises silica and wax wherein the composition has a median particle size in the range of about 2-12 microns, a wax content in the range of about 15-30 wt. % and the silica has a pore volume in the range of about 0.8 to 1.4 cc/g. The matting agent is particularly suitable for radiation curable coatings. The matting agent has been shown to be particularly efficient in such coatings, as well as shows consistent gloss over varying coat weights.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: August 3, 2004
    Assignee: Grace GmbH & Co. KG
    Inventors: Georg Lueers, David Joseph Kent, Volker Petry, Ute Pospesch
  • Patent number: 6696375
    Abstract: An improved flatting agent comprising an inorganic hydrogel having a pore volume of at least 1.0 ml/g, an average particle size in the range 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. The inorganic hydrogel flatting agents of this invention are prepared by milling an inorganic hydrogel under controlled temperature conditions wherein a volatiles content of at least 40 weight percent is maintained, to produce inorganic hydrogel particles characterized by a pore volume of at least 1.0 ml/g, an average particle size in the range of 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 24, 2004
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: William Alan Welsh, Stephen Raymond Schmidt
  • Patent number: 6680271
    Abstract: Zeolite granulates having improved abrasion resistance, obtained by spraying the zeolite granulates with an aqueous silica sol solution and then optionally drying and calcining them.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: January 20, 2004
    Assignee: Grace GmbH & Co. KG
    Inventors: Frank Heindl, Eckehart Roland, Elke Kossel, Oliver Feuer
  • Patent number: 6607667
    Abstract: Method for Absorbing substances wherein adsorbent particles comprising superparamagnetic and/or low Curie Temperature transition metal-containing cores surrounded by a hydrous siliceous oxide coating can be formed by an aqueous process wherein the core is precipitated from an aqueous solution and a siliceous oxide coating is deposited thereon while complete drying of the core is avoided until after the siliceous oxide is deposited. The resulting siliceous adsorbents exhibit strong superparamagnetic and/or low Curie temperature magnetic properties with low transition metal leachability.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: August 19, 2003
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: James Neil Pryor, Linda Lee Crump
  • Patent number: 6585960
    Abstract: Silica compositions for abrasive systems in dentifrice formulations are disclosed. The silica abrasive system comprises (a) silica gels having a median particle size below 7 microns, a pH of from about 6 to about 11 and powder RDA's of from 100 to about 200 and (b) silica gels or precipitates having a median particle size of 7 microns or greater and powder RDA's of from 50 to about 180. Silica (a) is preferably prepared by contacting a hydrous silica gel with an alkaline medium. Dentifrice compositions comprising the abrasive system has an RDA of 150 or less and PCR's of at least 80 and up to about 150, and an REA of less than about 30 (as measured on the IU scale).
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: July 1, 2003
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Michael Bruce Thomas, Michael Vance Ernest, Sandra Joan Kempske
  • Patent number: 6569933
    Abstract: The invention comprises a granulate comprising a) a micronized silicic acid gel (A) with an average particle size from 2 to 15 microns, a specific pore volume from 0.3 to 2.0 ml/g, a specific surface (BET) from 200 to 1000 m2/g, in a concentration from 5 to 60% by weight or b) a hydrated or dehydrated aluminosilicate (B) which contains sodium and/or potassium and/or calcium cations, with a particle size between 1 and 25 microns in a concentration from 5 to 75% by weight and c) an organic additive composition (C) in a concentration from 25 to 95% by weight, but at least 5% more (measured by the oil adsorption process) than that which is necessary to fill all pores of the silicic acid and the spaces between the silicic acid particles and the aluminosilicate and the aluminosilicate particles.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: May 27, 2003
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Mats Tonnvik, Andreas Sturm, Gonda van Essche, Andreas Schmidt