Patents Assigned to PPG Industries, Inc.
  • Patent number: 5772126
    Abstract: The waste material processing system of the present invention includes a (1) waste material supply; (2) shredder; (3) moisture reducing device; (4) crusher having a rotatable screw auger positioned within a cavity of the crusher for crushing and conveying waste material and a pressurizing device such as a conduit attached to the discharge end of the cavity for exerting a backpressure upon a portion of the waste material positioned about the second end of the auger such that a portion of the scrap glass fibers in the waste material is crushed; (5) dryer; and (6) separating device for separating waste material having a mean average length of less than about 5 millimeters from oversized dried waste material. Also provided by the present invention is a process for recycling waste material using the system.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: June 30, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Curtis L. Hanvey, Jr., Irvin L. Koelle
  • Patent number: 5769919
    Abstract: The present invention discloses a method and apparatus for shaping glass sheets to deeply sagged configurations using a lower outline mold and an upper shaping mold while minimizing marking of the sheets by shaping molds. The outline mold includes a support rail which generally corresponds to the desired curvature of a peripheral portion of the sheets to be shaped and supports the glass sheets as they are heated and sagged by gravity to a preliminary shape. The outline mold and the upper mold are then moved relative to each other to position the molds either in close proximity to each other or to press the upper mold against the glass sheets. Pressurized gas is then directed from the mold to at least the unsupported central portions of the preliminarily shaped sheets, to urge these unsupported portions downward and shape the sheets to a desired configuration.
    Type: Grant
    Filed: September 10, 1996
    Date of Patent: June 23, 1998
    Assignee: PPG Industries, Inc.
    Inventors: George R. Claassen, Irvin A. Wilson, David B. Rayburn, John L. McLaughlin, Rudolph A. Karlo, Jeffrey L. Marietti
  • Patent number: 5769342
    Abstract: A radially expandable endcap adapted for mounting upon a mandrel of a collet of a forming package winder. Other aspects of this invention include a collet and winder including the above endcap and method for winding strand using the same. Another aspect of the present invention is a collet having an expandable mandrel on at least a portion of a first end of the collet proximate an operator and distal to a second, opposite end of the collet mounted upon a support Other aspects of this invention are a winder including the above collet and a method for using the same.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: June 23, 1998
    Assignee: PPG Industries, Inc.
    Inventor: Harry Makitka
  • Patent number: 5770115
    Abstract: Describes a composition of a carrier, e.g., organic solvent or polymeric host material, photochromic naphthopyran material, and a stabilizer system comprising (a) polyphenolic antioxidant material, (b) ultraviolet light absorber and (c) hindered amine light stabilizer for said photochromic naphthopyran material. The stabilizer system is selected and used in amounts sufficient to provide at least a 30% reduction in % photopic fatigue of the naphthopyran material. The weight ratio of photochromic naphthopyran to the stabilizer system is from 2.5:1 to 1.5:1. The stabilizer system can comprise 5 to 50 weight percent of the antioxidant material, 5 to 50 weight percent of the ultraviolet light absorbent, and 10 to 90 weight percent of the hindered amine light stabilizer.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: June 23, 1998
    Assignee: PPG Industries, Inc.
    Inventor: Michael S. Misura
  • Patent number: 5767191
    Abstract: An improved electrodepositable composition is provided comprising: (a) an active hydrogen-containing cationic resin electrodepositable on a cathode; (b) a capped polyisocyanate curing agent; and (c) an organotin-containing catalyst. The improvement comprises the addition to the electrodepositable composition of a water immiscible acid functional compound having a hydrocarbon chain of at least 5 carbon atoms like abietic acid and natural sources thereof. A preferred acid functional compound is abietic acid. The composition provides improved cure response and appearance properties when electrodeposited over conductive substrates.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: June 16, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Steven R. Zawacky, Robert R. Zwack, Gregory J. McCollum, Venkatachalam Eswarakrishnan, Edward R. Coleridge
  • Patent number: 5761946
    Abstract: A flat elongated substrate having a bead of a gas and/or moisture pervious adhesive having a desiccant is moved along a predetermined linear path between spaced upper wheels aligned with spaced lower wheels. The upper wheels have a peripheral groove to shape the bead as the substrate moves between the upper and lower wheels. The lower wheels each have a U shape peripheral groove with the base of the U of the downstream wheels being narrower than the base of the U of the upstream wheels and the depth of the U of the downstream wheels being deeper than the depth of the U of the upstream wheels to provide a spacer stock having a base connected to a pair of spaced upright legs such that the base connected to the legs have a generally U shape configuration and a shaped bead on the surface of the base between the legs. The spacer stock may be bent to form a spacer frame to separate outer sheets of an insulating glazing unit.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: June 9, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Stephen C. Misera, William Randolph Siskos
  • Patent number: 5760107
    Abstract: An electrodepositable composition is provided comprising:(A) a non-gelled cationic resin which is derived from a polyepoxide and which contains in the resin molecule cationic salt groups and active hydrogen groups selected from aliphatic hydroxyl and primary and secondary amino; and present as a separate component(B) a fully capped polyisocyanate curing agent containing substantially no free isocyanate groups. The electrodepositable composition contains from about 0.02 to 1.0 milliequivalents phenolic hydroxyl groups per gram of resin solids, and from about 0.1 to 2.0 milliequivalents beta-hydroxy ester groups per gram of resin solids. The composition provides excellent corrosion resistance when electrodeposited over steel substrates, and does not require lead in the formulation nor the use of a conventional chrome rinse for the steel substrate pretreatment before electrodeposition.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 2, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Joseph T. Valko, Philippe Faucher, Richard F. Karabin, Thomas C. Moriarity, V. Eswarakrishnan, Ellor J. Van Buskirk, Gregory J. McCollum, Raphael O. Kollah
  • Patent number: 5759694
    Abstract: A novel polyester is provided comprising the reaction product of: (1) an acid functional polyester which is prepared from: (a) a material of the structure: ##STR1## wherein X is a lower alkyl group having from about 1 to about 4 carbon atoms, and R and R' are independently lower alkylene groups having from about 1 to about 4 carbon atoms; (b) a polyol different from (a); and (c) a polyacid; and (2) a monoepoxide containing from about 3 to 20 carbon atoms. The reaction product is carbamoylated. The carbamoylated polyester can be present in a film-forming composition also having a carbamate functional acrylic polymer; and an aminoplast crosslinking agent. Also such a film-forming composition can be a clear coat in a multi-component composite coating composition.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: June 2, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Michael A. Mayo, Daniel E. Rardon, Leigh-Ann Humbert
  • Patent number: 5755869
    Abstract: In accordance with the present invention, metal pigments are provided which are normally reactive with water or moisture to release hydrogen gas ("gassing") and which have been stabilized against such gassing by having their surfaces treated with an adduct of a maleinized fatty acid and/or a maleinized alpha-olefin and a polyol. Waterborne film-forming compositions which comprise an aqueous diluent medium, a film-forming polymer, and metal pigment stabilized against gassing by treatment with an adduct of a maleinized fatty acid or a maleinized alpha-olefin and a polyol are also provided.
    Type: Grant
    Filed: May 15, 1997
    Date of Patent: May 26, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Kurt G. Olson, James E. Poole, Paul H. Lamers
  • Patent number: 5753316
    Abstract: In one embodiment, the present invention relates to a method of treating metal surfaces including the steps: coating the metal surface with a film-forming sealcoat containing at least one organic resin and at least one torque modifier, with the proviso that if the metal surface is a phosphated metal surface, then no other film of a siccative organic coating other than the film-forming sealcoat is applied; and curing the film-forming sealcoat.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: May 19, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Randall J. Brent, Robert D. Anthony
  • Patent number: 5750770
    Abstract: Hydroxy functional, unsaturated diesters are disclosed that comprise the esterification reaction products of unsaturated anhydrides with secondary alcohols to form monoesters, followed by oxyalkylation of the monoester with epoxy compounds, whereby a diester is formed with hydroxy functionality. Use of secondary alcohol yields monoesters less prone to disproportionation. The unsaturated diesters may be copolymerized with vinyl monomers to form hydroxy functional copolymers useful in coating applications, wherein they may be included in compositions along with a curing agent that is reactive with hydroxy groups.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: May 12, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Edward E. McEntire, Lyle L. Foringer
  • Patent number: 5748155
    Abstract: The present invention discloses a glass antenna and connection arrangement. The antenna includes a first glass sheet having a notch area cut out along a portion of an edge of the first sheet, a second glass sheet secured in overlaying relation to the first sheet, and at least one electroconductive antenna element supported on the second sheet between the first and second sheets. The antenna element includes a portion that extends into the notch area. A connector is positioned within the notch area and filler material fills the notch area to secure the connector within the notch area and seal the notch area. The connector includes a first section which overlays the portion of the electroconductive antenna element extending within the notch area, a second section with selected portions which extend along and are secured to an outer major surface of the first sheet, and a third section which interconnects the first and second sections.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: May 5, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Randy R. Kadunce, Robert T. Shumaker, Jr., Peter T. Dishart
  • Patent number: 5747162
    Abstract: The present invention includes curable compositions adapted to coat substrates. In one embodiment, the composition includes an antioxidant selected from terpene materials; vitamin materials different from the terpene materials; and combinations thereof in an amount of about 0.00001 weight percent to about 5 weight percent based upon the weight of the substrate. In another embodiment, the composition includes (a) an antioxidant selected from terpene materials; vitamin materials different from the terpene materials; and combinations thereof in an amount effective to inhibit oxidation of the composition; and (b) a film-forming material capable of forming a substantially uniform continuous coating on the substrate. Also included are substrates and sized glass fibers coated with such compositions and fabrics woven from such coated fibers. Other aspects of the present invention include methods for inhibiting the oxidation of a coating composition adapted to coat substrates.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: May 5, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Chester S. Temple, Luciano M. Parrinello
  • Patent number: 5746837
    Abstract: This invention relates to an aqueous composition for use in enhancing the mobility of an aluminum can that is transported along a conveyor or trackwork, said composition comprising water and a mobility enhancing amount of (A) the product made by the reaction of (A)(I) at least one carboxylic acid or acid-producing compound with (A)(II) ammonia, at least one amine, or at least one alkali or alkaline-earth metal. This invention also relates to a process for cleaning an aluminum can wherein the foregoing mobility enhancer is applied to the exterior of an aluminum can during the wash stage, during a conditioning or conversion coating stage, or during one or more rinse stages. The aqueous compositions of the invention containing alkanolamide mobility enhancers also reduce the temperature at which washed cans can be dried.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: May 5, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Leslie M. Beck, David A. Raney
  • Patent number: 5746992
    Abstract: Liquid comprising from 93 to 100 percent by weight alcohol is removed from silica alcogel at subcritical temperature to produce silica aerogel. The silica aerogel produced by the method of the present invention not only has high porosity, but in most instances it also has a narrow distribution of small pore sizes. The silica aerogel is preferably reduced in size so as to form particulate silica aerogel.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: May 5, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Bulent E. Yoldas, Michael O. Okoroafor
  • Patent number: 5747003
    Abstract: A statistically large population of particles of amorphous precipitated silica comprising pigmentary phase particles and glassy phase particles and having a glassy phase fraction in the range of from 0.3 to 30 area percent is useful as an abrasive for dentifrice compositions, especially toothpaste.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: May 5, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Shantilal M. Mohnot, Harold E. Swift, Thomas G. Krivak, Robert H. Fear, Laura M. Randall, Laurence E. Jones
  • Patent number: 5744243
    Abstract: Describes a composition for producing durable coatings and a process for preparing a single-layer broad band antireflective coating on solid substrates, such as glass, ceramics, metals, and organic polymeric materials. The coating composition comprises, in combination, acid catalyzed hydrolysis and condensation products of water-silane monomer mixture and a film forming amount of a polymer having functional groups selected from amino, hydroxy and carboxy, hydroxy and amino, amino and carboxy, and amino, hydroxy and carboxy. The described process comprises applying the aforesaid coating composition (or an acid catalyzed sol-gel coating composition) substantially free of preformed oxide sol and water soluble metal salt to the surface of a solid substrate, curing the applied coating, and treating the cured coating with an aqueous electrolyte solution for a time sufficient to produce a coating having graded porosity which is antireflective over a broad band of the visible spectrum.
    Type: Grant
    Filed: September 10, 1996
    Date of Patent: April 28, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Huawen Li, Alan E. Wang, Suryya K. Das
  • Patent number: 5744542
    Abstract: An aqueous two-component polyisocyanate coating composition is based on an essentially isocyanate-free emulsifier that comprises the reaction product of:(i) an isocyanate and(ii) a member selected from the group consisting of: hydroxy functional polyalkyl ethers containing at least five ethylene oxide, alcohols different from said polyalkyl ethers, amine compounds, and combinations thereof. The hydroxy functional polyalkyl ether is provided in a quantity sufficient to react at least one equivalent of isocyanate groups in polyisocyanate (i), and the total amounts of reactants (ii) are sufficient to react all of the isocyanate groups of the polyisocyanate (i).
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: April 28, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Jonathan T. Martz, Joseph M. Carney, Robert E. Jennings, Karen D. Donnelly
  • Patent number: 5744531
    Abstract: An anionic electrocoating composition is provided including an electrodepositable .beta.-hydroxyalkylamide curing agent and an electrodepositable polymer capable of crosslinking with the curing agent. This curing agent includes an organic radical that (a) contains from 8 to 60 carbon atoms; (b) is derived from a substituted or unsubstituted aliphatic, alicyclic or aromatic hydrocarbon radical; and (c) is bonded to n .beta.-hydroxyalkylamide groups, wherein n is an integer from 1 to 4, to form ##STR1## where R.sup.1 can be H or a substituted or unsubstituted aliphatic, alicyclic or aromatic group containing up to 6 carbon atoms;where R.sup.2 and R.sup.3 can be the same or different and can be H or a substituted or unsubstituted aliphatic, alicyclic, or aromatic group containing up to 36 carbon atoms;where R.sup.4 can be H or a substituted or unsubstituted aliphatic group containing up to 8 carbon atoms when n is an integer form 2 to 4, and a .beta.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: April 28, 1998
    Assignee: PPG Industries, Inc.
    Inventors: Paul R. Kerr, Raphael O. Kollah, Steven R. Zawacky, Patricia A. Aikens
  • Patent number: 5744215
    Abstract: Surface haze resulting from a rough surface of a substrate e.g. a fluorine doped tin oxide coated glass piece is reduced by coating the rough surface with a smooth surface coating of sufficient thickness to smooth out the rough surface e.g. coating the tin oxide layer with a silica film having a thickness of about 100 to 2000 Angstroms.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: April 28, 1998
    Assignee: PPG Industries, Inc.
    Inventor: George A. Neuman