Patents Assigned to Pilkington Aerospace Inc.
  • Patent number: 6458875
    Abstract: The present invention is embodied in a polyurethane composition suitable for coating, casting or laminating, which incorporates a prescribed additive selected to increase the composition's electrical conductivity without adversely affecting the composition's transparency and percent haze and without adversely affecting its adhesion to an underlying substrate or its environmental durability, especially with regard to humidity resistance. The prescribed additive is an ionizable metal salt of a perfluoroalkylsulfonimide, in a weight percent of 0.5 to 5.0, with the metal being an alkali metal and the preferred perfluoroalkylsulfonimide being trifluoromethanesulfonimide. The most preferred salt is lithium trifluoromethanesulfonimide. The preferred polyurethanes include both aliphatic polyetherurethanes and aliphatic polyesterurethanes.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: October 1, 2002
    Assignee: Pilkington Aerospace Inc.
    Inventors: Stephen L. Sandlin, Lin Hin Hoo, Marlowe V. Moncur
  • Patent number: 6399205
    Abstract: The present invention is embodied in a polyurethane composition suitable for coating, casting or laminating, which incorporates a prescribed additive selected to increase the composition's electrical conductivity without adversely affecting the composition's transparency and percent haze and without adversely affecting its adhesion to an underlying substrate or its environmental durability, especially with regard to humidity resistance. The prescribed additive is an ionizable metal salt of a perfluoroalkylsulfonimide, in a weight percent of 0.5 to 5.0, with the metal being an alkali metal and the preferred perfluoroalkylsulfonimide being trifluoromethanesulfonimide. The most preferred salt is lithium trifluoromethanesulfonimide. The preferred polyurethane include both aliphatic polyetherurethanes and aliphatic polyesterurethanes.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: June 4, 2002
    Assignee: Pilkington Aerospace Inc.
    Inventors: Stephen L. Sandlin, Lin Hin Hoo, Marlowe V. Moncur
  • Patent number: 6093451
    Abstract: The present invention is embodied in a polyurethane composition suitable for coating, casting or laminating, which incorporates a prescribed additive selected to increase the composition's electrical conductivity without adversely affecting the composition's transparency and percent haze and without adversely affecting its adhesion to an underlying substrate or its environmental durability, especially with regard to humidity resistance. The prescribed additive is an ionizable metal salt of a perfluoroalkylsulfonimide, in a weight percent of 0.5 to 5.0, with the metal being an alkali metal and the preferred perfluoroalkylsulfonimide being trifluoromethanesulfonimide. The most preferred salt is lithium trifluoromethanesulfonimide. The preferred polyurethanes include both aliphatic polyetherurethanes and aliphatic polyesterurethanes.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: July 25, 2000
    Assignee: Pilkington Aerospace Inc.
    Inventors: Stephen L. Sandlin, Lin Hin Hoo, Marlowe V. Moncur
  • Patent number: 6001923
    Abstract: In accordance with the present invention, there are provided coating compositions for preparing crosslinked fluorinated polyurethane coatings and liners that exhibit high optical clarity and transparency, as well as resilience against adverse environmental effects. The present invention also provides methods for coating solid substrates with transparent, environmentally-resistant crosslinked, fluorinated polyurethane coatings, as well as the resulting coated articles.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: December 14, 1999
    Assignee: Pilkington Aerospace Inc.
    Inventors: Marlowe V. Moncur, Lin H. Hoo, E. John Houghton
  • Patent number: 5939188
    Abstract: Transparent substrates having at least one surface coated with a transparent coating system to improve their environmental durability are described. The transparent coating system consists of a combination of components having different properties applied as separate layers to the transparent substrate. A thin layer of a silica-based adhesion promoter is applied directly to at least one surface of the substrate, followed by an organosilane primer layer, then a low modulus polyurethane layer, and, lastly, a thermoset aliphatic polyurethane layer. Alternatively, the low modulus polyurethane may also contain silanol groups or functional groups that can be hydrolyzed to silanol, thereby making a separate primer layer unnecessary.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: August 17, 1999
    Assignee: Pilkington Aerospace, Inc.
    Inventors: Marlowe Vern Moncur, Clifford David Jeungst
  • Patent number: 5378535
    Abstract: Primer systems foe silicone elastomers bonded to glass or plastic substrates, particularly those elastomers used as interlayer materials in a transparent lamination of such substrates, are described. The primer system consists of a thin layer of a silica-based adhesion promoter which is applied directly to at least one surface of the substrate. An organosilane primer containing (i) silanol or functional groups that can hydrolyzed to silanol, and (ii) polymerizable alkene or silicon hydride functional groups, or preferably both, is applied over the silica-based adhesion promoter layer. Alternatively, the silicone elastomer may also contain silanol groups or functional groups that can be hydrolyzed to silanol, and polymerizable alkene or silicon hydride functional groups, thereby making a separate primer layer unnecessary. Both components must be present for the primer system to provide a more durable adhesive bond.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: January 3, 1995
    Assignee: Pilkington Aerospace, Inc.
    Inventors: Marlowe V. Moncur, Janet A. Andrechak, Clifford D. Jeungst
  • Patent number: 5296295
    Abstract: Radiation-curable coating compositions which form transparent, abrasion-resistant tintable coatings upon curing by exposure to high intensity irradiation, such as ultraviolet light or electron beam irradiation. The coating composition comprises a combination of effective amounts of (a) colloidal silica, (b) the hydrolysis product of a silane compound having a polymerizable functional group such as acryloxy-functional silanes or glycidoxy-functional silanes or mixtures of both, (c) polyfunctional, polymerizable, non-acrylate-functional ethers, (d) at least one radiation sensitive initiator and, preferably, (e) a monofunctional monomer. When the surface of a substrate coated with the cured coating composition is immersed in a colored dye bath for a sufficient period of time, the coating absorbs or transmits to the substrate a desired amount of dye.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: March 22, 1994
    Assignee: Pilkington Aerospace Inc.
    Inventors: William C. Perkins, William Lewis