Patents Assigned to PPG Industries, Inc.
  • Patent number: 4075141
    Abstract: Coating compositions having improved application characteristics as well as other desirable properties are prepared by adding insoluble crosslinked polymeric microparticles to solutions or dispersions of carboxylic acid amide interpolymers. The compositions may be spray coated onto various substrates in two coat applications to form coatings having improved film build, pattern control and flow control while maintaining the gloss characteristics of the film.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Samuel Porter, Jr., Bruce N. McBane
  • Patent number: 4075148
    Abstract: Coating compositions which are water soluble or dispersible after basic neutralization comprise the reaction product in the proportion by weight of 90:10 to 10:90 of (1) one or more epoxy resins containing 1 to 2 free oxirane groups, which can be partially esterified by fatty acids, with (2) one or more compounds obtained by the reaction of diene polymerizates with alpha,beta unsaturated carboxylic or dicarboxylic acids or anhydrides, in the presence of an alcoholic moderator solvent. The reaction is conducted at a temperature of at least 130.degree. C.These coating compositions may contain, if desired, other components such as pigments, partial esters and methylol phenol ethers. They can be applied by roller, spraying, dipping, and are especially adapted for application by electrodeposition, to obtain after curing coatings which are both flexible and hard.
    Type: Grant
    Filed: July 8, 1975
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Jean Zatmann
  • Patent number: 4075240
    Abstract: Novel polymers formed from the reaction of tetracarboxylic dianhydrides and hydrazines or hydrazides which may be cross-linkable by further reaction with a hydrazine or a hydrazide are disclosed.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc
    Inventors: Karl F. Schimmel, Marco Wismer
  • Patent number: 4074989
    Abstract: A process is described for preparing anhydrous boric acid (ABA)-containing glass batch compositions suitable for the preparation of glass fibers in which the batch, prior to its introduction into the furnace, is pelletized by adding water in sufficient quantities to maintain an adequate balling action and thus provide pellets in a form such that preheating by direct contact with flue gases does not cause deterioration of the pellets.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Stanley F. Brzozowski, Joseph E. Cooper
  • Patent number: 4075070
    Abstract: Disclosed is an improved method of electrolysis utilizing an electrode fabricated from an alloy of titanium and a rare earth metal. The electrode may be a cathode, or, when having a suitable electrocatalytic coating, an anode, or even a bipolar electrode with anodic and cathodic regions. Also disclosed are electrolytic cells containing such a bipolar electrode, and electrolytic cells containing electrodes fabricated of alloys of titanium and rare earth metals.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Donald W. Du Bois, William B. Darlington
  • Patent number: 4074823
    Abstract: This invention relates to a front restraint device for article shipping bins. The articles, e.g., automotive backlites are positioned on an edge and tilted to rest on an adjustable back support for packing stability. The articles are secured in the bin by a pneumatic front restraint device or a mechanical front restraint device incorporating features of the invention and mounted at the ingress end of the bin. The pneumatic front restraint device includes an inflatable member which when inflated moves a rigid pad into engagement with the articles. The mechanical front restraint device includes a rigid pad which is moved into engagement with the articles and biased toward the articles. The front restraint devices act on the articles to (1) secure the articles in the bin as a unitized pack; (2) limit oscillatory and lateral motions of the articles; and (3) dampen oscillatory and lateral forces acting on the articles during transit.
    Type: Grant
    Filed: October 22, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Walter E. Pater, James R. Rowley
  • Patent number: 4074991
    Abstract: A process is described for preparing boric acid-containing glass batch compositions suitable for the preparation of glass fibers in which the batch, prior to its introduction into the furnace, is pelletized by adding water in sufficient quantities to maintain an adequate balling action and thus provide pellets in a form such that preheating by direct contact with flue gases does not cause deterioration of the pellets.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Stanley F. Brzozowski, Joseph E. Cooper
  • Patent number: 4074995
    Abstract: The present invention relates to a method of reducing the severity of edge kinking that sometimes occurs when heated glass sheets are shaped by roll forming. The improvement comprises superficially cooling one or both side edge portions of each glass sheet between a furnace exit and a roll forming station where its undersurface is lifted by a set of lower rotating forming rolls having a concave configuration in their axial direction which is transverse to the direction of glass sheet movement.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Robert G. Frank
  • Patent number: 4074990
    Abstract: A process is described for preparing colemanite-containing glass batch compositions suitable for the preparation of glass fibers in which the batch, prior to its introduction into the furnace, is pelletized by adding water in sufficient quantities to maintain an adequate balling action and thus provide pellets in a form such that preheating by direct contact with flue gases does not cause deterioration of the pellets.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Stanley F. Brzozowski, Joseph E. Cooper
  • Patent number: 4075006
    Abstract: Novel S-aryl N-alkynylthiolcarbamates such as S-4-methoxyphenyl N-(1,1-dimethyl-2-propynyl)thiolcarbamate which are useful for controlling the effect on plants of plant pests such as pathogenic nematodes, fungi, or other pathogenic organisms; particularly Meloidogyne nematodes, Sclerotium rolfsii, Fusarium solani, and Puccinia rubigo-vera are disclosed. The methods of controlling plant pests with these thiolcarbamates are also disclosed.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Jay K. Rinehart
  • Patent number: 4075135
    Abstract: A method of preparing resinous vehicles in aqueous medium by addition polymerizing a material having CH.sub.2 .dbd.C< moieties with a partially neutralized reaction product of an unsaturated carboxylic acid or anhydride and polybutadiene is disclosed. The resinous vehicles are prepared in a manner such that they are useful for electrodeposition.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Edward L. Jozwiak, Jr., Suryya K. Das
  • Patent number: 4075184
    Abstract: Disclosed is a method of sulfonating polymers having chlorotrifluoroethylene moieties. According to the disclosed method, a liquid composition containing the polymer, an excess of thiourea, and a solvent is maintained above about 100.degree. C. at a pressure sufficient to maintain the composition liquid. A polymer product having trifluoroethylene sulfonic acid and chlorotrifluoroethylene moieties is recovered. Also disclosed is a polymer having (CX.sub.1 X.sub.2 -CX.sub.3 X.sub.4), (CF.sub.2 -CFCl), and (CF.sub.2 -CF(SO.sub.3)) moieties where X.sub.1, X.sub.2, X.sub.3, and X.sub.4 may be hydrogen or fluorine.
    Type: Grant
    Filed: March 11, 1976
    Date of Patent: February 21, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Thomas A. Rechlicz
  • Patent number: 4073849
    Abstract: A method of forming a continuous film of an elastomeric latex and a phenolic resin comprising spraying a plurality of coats of the aqueous admixture onto a nonadherent surface. The nonadherent surface is at a temperature of 120.degree. F. or greater and each coat of the aqueous admixture is less than about 0.7 mil dry film thickness. The film so formed can be tested for physical properties and the testing results are capable of being correlated with the performance of glass fibers with the aqueous admixture coated thereon for reinforcement of elastomeric matrices.
    Type: Grant
    Filed: January 29, 1976
    Date of Patent: February 14, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Norman G. Bartrug, Donald L. McDaniel
  • Patent number: 4073986
    Abstract: A laminated glass-plastic glazing unit suitable for aircraft is disclosed. The unit comprises a pair of sheets of rigid transparent material such as glass or different sizes and an integral interlayer of thermoplastic material having a higher coefficient of thermal expansion than the sheets of rigid transparent material. The interlayer is preponderantly plasticized polyvinyl butyral and integral therewith between at least one of said rigid sheets and said interlayer is a thin layer of polyurethane to reduce the tendency of the interlayer to pull chips from one or both of the rigid sheets when the unit is exposed to extremely low temperatures while in flight in high-flying aircraft.
    Type: Grant
    Filed: May 14, 1975
    Date of Patent: February 14, 1978
    Assignee: PPG Industries, Inc.
    Inventors: Leroy D. Keslar, James E. Vensel
  • Patent number: 4073002
    Abstract: A self adjusting power supply for induction charging electrodes used in electrostatic spray coating apparatus is disclosed. A first resistance of high ohmic value is connected in series between a source of high direct current voltage and the induction charging electrode, while a second resistance is connected between the source of voltage and a ground reference point. The first resistance acts as a voltage divider with the spacial impedance which exists between the charging electrodes and ground in the spray nozzle of the spray coating apparatus, and serves to regulate the charging voltage and to compensate for variations in the conductivity of the material being sprayed. If the value of the spacial impedance should decrease for any reason, the increased current flow therethrough produces an increase in the voltage drop across the first resistance, thereby reducing and thus regulating the potential at the charging electrodes and serving to prevent corona and arcing within the spray gun.
    Type: Grant
    Filed: November 2, 1976
    Date of Patent: February 7, 1978
    Assignee: PPG Industries, Inc.
    Inventors: James E. Sickles, Richard M. Tepper
  • Patent number: 4072259
    Abstract: Lateral scores in an annealed glass ribbon are opened by applying a bending moment about the score while applying additional tension to the glass ribbon adjacent its edges.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: February 7, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Sanford M. Welton
  • Patent number: 4072772
    Abstract: A surface of an article is coated by moving the article downstream through a linear curtain spray rinse applicator and thereafter through a linear curtain spray coating applicator. The rinse applicator and coating applicator are positioned relative to one another such that the rinsing spray and coating spray intersect at the surface of the article. The rinsing medium is applied as a spray having upstream frontal forces lying in a plane generally parallel to the surface of the article to provide the surface with a uniform thickness of rinsing medium film. The coating medium is applied to the surface of the article having downstream frontal forces lying in a plane generally parallel with the surface of the article to prevent the rinsing medium mixed with the coating medium from moving upstream into the coating spray. In this manner, the surface of the article is more uniformly coated.
    Type: Grant
    Filed: August 9, 1973
    Date of Patent: February 7, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Helmut Franz
  • Patent number: 4072492
    Abstract: Energy is conserved and the quality of the bent glass product improved by pre-heating gravity sag bending molds in an open-bottomed hood overlying a bending lehr. The hood traps otherwise wasted heat rising from the bending lehr.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: February 7, 1978
    Assignee: PPG Industries, Inc.
    Inventor: William A. Castine, Jr.
  • Patent number: 4072493
    Abstract: Method and apparatus for shaping one or more glass sheets by gravity sag bending to a shape including one or more sharp bends by combining overall heating and localized heating using one or more electroconductive heating ribbons and guiding means to locate the ribbons below the shaping surface of a sectionalized mold in positions which do not interfere with loading or unloading of glass sheets on said mold.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: February 7, 1978
    Assignee: PPG Industries, Inc.
    Inventor: Vaughn R. Imler
  • Patent number: 4071342
    Abstract: An apparatus for producing glass fibers is disclosed. The apparatus includes means associated with an applicator for moving the glass filaments from the surface of the applicator when waste filaments are being produced such that the glass filaments are brought into contact with the application surface for coating the filaments with a binder and/or size only when production quality strand is being produced. This substantially reduces binder and/or size consumption and prevents the operator of the forming position from coming into physical contact with the binder and/or size coated strand.
    Type: Grant
    Filed: March 8, 1977
    Date of Patent: January 31, 1978
    Assignee: PPG Industries, Inc.
    Inventors: William L. Schaefer, Thomas J. Briar