Silicone carbonate polymers as release layers for pressure sensitive adhesive containing articles

Abstract

The disclosure relates to articles comprising a substrate, a pressure sensitive adhesive, and a release layer, wherein the release layer comprises at least one silicone carbonate polymer.

What is claimed is: 
     
         1 . An article comprising
 a substrate having a first major surface and a second major surface;   a pressure sensitive adhesive disposed on the first major surface; and   a release layer comprising a silicone carbonate polymer disposed on the second major surface.   
     
     
         2 . The article of  claim 1 , wherein one or more of the first major surface and the second major surface comprises a primer layer. 
     
     
         3 . The article of  claim 1 , wherein the substrate comprises a non-cellulosic material. 
     
     
         4 . The article of  claim 3 , wherein the non-cellulosic material comprises at least one of polymethyl methacrylate, ethylene vinyl acetate copolymer, acrylate-modified ethylene vinyl acetate copolymer, ethyl acrylic acid copolymer, polyethylene terephthalate and nylon. 
     
     
         5 . The article of  claim 4 , wherein the non-cellulosic material comprises one or more of polyethylene, polypropylene, and polyethylene terephthalate. 
     
     
         6 . The article of  claim 4 , wherein the substrate comprises polyimide. 
     
     
         7 . The article of  claim 1 , wherein the silicone carbonate copolymer comprises at least one silicone portion having the structure of Formula (I) 
       
         
           
           
               
               
           
         
         wherein each R is independently an organic moiety and n is the degree of polymerization of the at least one silicone portion, which is no less than 1. 
       
     
     
         8 . The article of  claim 7 , wherein the at least one silicone portion comprises polydimethylsiloxane. 
     
     
         9 . The article of  claim 1 , wherein the silicone carbonate polymer comprises at least one carbonate portion having the structure of Formula (II) 
       
         
           
           
               
               
           
         
         wherein R′ is a hydrocarbon diradical or an aromatic diradical and m is the degree of polymerization of the at least one carbonate portion, which is no less than 1. 
       
     
     
         10 . The article of  claim 9 , wherein R′ is selected from the group consisting of diradicals of Formulas (III) to (VI) 
       
         
           
           
               
               
           
         
       
       wherein either:
 R 1  is H, C 1  to C 4  alkyl, C 1  to C 4  fluoroalkyl, C 1  to C 4  perfluoroalkyl, or phenyl, and R 2  is H H, C 1  to C 4  alkyl, C 1  to C 4  fluoroalkyl, C 1  to C 4  perfluoroalkyl, or phenyl; or 
 R 1  and R 2  are covalently bonded to one another to make, together with the carbon atom to which they are attached, cyclohexyl, methyl cyclohexyl, dimethyl cyclohexyl, or trimethyl cyclohexyl or tetramethyl cyclohexyl; 
 R 3  is C 1  to C 4  alkyl, phenyl, or H; and 
 R 4  is C 1  to C 4  alkyl, phenyl, or H. 
 
     
     
         11 . The article of  claim 10 , wherein R′ is selected from the group consisting of diradicals of Formulas (VII) to (XXII) 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         12 . The article of  claim 11 , wherein R′ is the diradical of Formula (VII) 
       
         
           
           
               
               
           
         
       
     
     
         13 . The article of  claim 1 , wherein the article is a tape. 
     
     
         14 . The article of  claim 13 , further comprising a roller and wherein the tape is wound around a roller. 
     
     
         15 . The article of  claim 13 , further comprising a cutting element.