Now showing items 1-5 of 5

    • Aramid compositions of improved solubility and flame retardancy 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; McGrath, James E.; Gungor, Attila; Delaviz, Yadollah (United States Patent and Trademark Office, 1995-05-30)
      Aramid polymers, e.g., those derived from p-phenylene diamine and terephthaloyl chloride, can have their solubility properties and flame retardancy enhanced by the incorporation therein of a moiety derived from a ...
    • Bis(functionally-substituted phenylene) semi-rigid crowns and process for making 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Delaviz, Yadollah (United States Patent and Trademark Office, 1991-07-02)
      Bis(carboalkoxy-substituted phenylene)-32-crown-10 compounds, useful as polymerizable monomers, can be formed by first reacting a functionalized dihydroxy aromatic compound with a hydroxy protecting group-substituted ...
    • Dibenzo crown monomers and polymers formed therefrom 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Delaviz, Yadollah (United States Patent and Trademark Office, 1994-04-12)
      Novel bis(extraannular functionally-substituted phenylene) crown compounds, useful as chelating agents or in the synthesis of condensation polymers containing large semi-rigid macrocycles in the polymer backbone, are ...
    • Mono- and di(functionally-substituted phenylene) semi-rigid crowns and precursors thereof 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Delaviz, Yadollah (United States Patent and Trademark Office, 1994-07-19)
      Bis(carboalkoxy-substituted m-phenylene)-32-crown-10 compounds, useful as polymerizable monomers, can be formed in one step by reacting a functionalized dihydroxy aromatic compound with a dihalopolyether. In the same ...
    • Mono- and Di(functionally-substituted phenylene) semi-rigid crowns and processes for making 

      Virginia Tech Intellectual Properties, Inc.; Gibson, Harry W.; Delaviz, Yadollah (United States Patent and Trademark Office, 1992-08-25)
      Bis(carboalkoxy-substituted m-phenylene)-32-crown-10 compounds, useful as polymerizable monomers, can be formed in one step by reacting a functionalized dihydroxy aromatic compound with a dihalopolyether. In the same ...