Loading patent…
AssigneeEastman Kodak Company
InventorsBradley K. Coltrain, Wayne T. Ferrar, Christine J. Landry
Estimating the term…
The invention provides a blend of metal oxide, such as silicon oxide, with etheric phosphazene. The invention optionally contains salt for antistatic coatings. The composition of the invention is formed by preparing solutions of etheric phosphazene and alkoxysilane, such as tetraethoxysilane. The solutions are then coated onto suitable substrates, or cast films and cured at room temperature or with moderate heating. The coatings and films produced are transparent, tough, hard, and flexible. They are multicomponent blends of the silicon oxide and phosphazene. It is also within the invention to form the blends with other metal oxides, rather than silicon, such as titanium, aluminum, or zirconium. The composite may be doped with low lattice energy salts to form antistatic composites.
A process of forming a blended composite comprising combining etheric phosphazene and a metal oxide precursor in a solvent solution, said metal oxide precursor comprises a silicic acid heteropolycondensate prepared by polycondensation of at least one silicon-functional silane of the formula SiX.sub.4 wherein X is hydrogen, halogen, alkoxy, aryloxy, carboxy, or an --NR.sub.2 group in which R is hydrogen and/or alkyl and/or aryl with the proviso that not all X are hydrogen, mixing until the etheric phosphazene and metal oxide precursor are dissolved, casting the dissolved materials and curing to recover a blended composite of etheric phosphazene and metal oxide that is not covalently cross-linked between the etheric phosphazene and metal oxide.
Dependencies are inferred from the claim text.