Moisture barrier coatings

Abstract

A barrier assembly having a flexible or rigid substrate overcoated with an all polymer multilayer stack. A multilayer on the substrate includes alternating diamond-like glass or carbon layers with polymer layers. Another multilayer includes alternating polymer layers using different types of polymers. The barrier layers can be used to mount, cover, encapsulate or form composite assemblies for protection of moisture or oxygen sensitive articles

1 . A composite assembly for protection of a moisture or oxygen sensitive article, comprising:
 a substrate;   a polymer layer overcoated on the substrate; and   a diamond-like glass layer overcoated on the polymer layer, wherein the diamond-like glass layer comprises an at least substantially amorphous glass including carbon and silicon and has an oxygen to silicon ratio less than 1.5.   
   
   
       2 - 3 . (canceled) 
   
   
       4 . The assembly of  claim 1 , wherein the diamond-like glass layer further comprises nitrogen. 
   
   
       5 - 8 . (canceled) 
   
   
       9 . The assembly of  claim 1 , wherein the assembly is equal to or less than one micron thick. 
   
   
       10 . The assembly of  claim 1 , further comprising a polymer topcoat. 
   
   
       11 . The assembly of  claim 1 , further comprising one or more of the following functional layers: a flame retardant; a UV stabilizer; an abrasion resistant or hardcoat material;
 an optical coating; a prismatic film; an adhesive; a primers; or a low adhesion backsize material.   
   
   
       12 . The assembly of  claim 1 , further comprising an ink displaying visual information. 
   
   
       13 . The assembly of  claim 1 , further comprising a dye or pigment absorbing selected regions of the light spectrum. 
   
   
       14 . A composite assembly for protection of a moisture or oxygen sensitive article, consisting of:
 a substrate; and   one or more dyads overcoated on the substrate, wherein each of the one or more dyads consists of:
 a polymer layer; and 
 a diamond-like glass layer, wherein the diamond-like glass layer comprises an at least substantially amorphous glass including carbon and silicon. 
   
   
   
       15 . The assembly of  claim 14 , wherein the diamond-like glass has an oxygen to silicon ratio less than 1.5. 
   
   
       16 . A composite assembly for protection of a moisture or oxygen sensitive article, comprising:
 a substrate;   a polymer layer overcoated on the substrate;   a diamond-like glass layer overcoated on the polymer layer, wherein the diamond-like glass layer comprises an at least substantially amorphous glass including carbon and silicon; and   an inorganic barrier layer overcoated on the diamond-like glass layer.   
   
   
       17 . The assembly of  claim 16 , wherein the diamond-like glass has an oxygen to silicon ratio less than 1.5.