Blended release materials

Abstract

Blended, release materials containing crosslinked silicones, crosslinked fluorosilicones, and nonfunctional fluorosilicones are described. Articles including release liners and adhesive articles are also described, as are methods of making such blended release materials and articles incorporating them.

What is claimed is: 
     
         1 . A composition comprising a blend of:
 (a) a functional, non-fluorinated, silicone polymer comprising at least two ethylenically unsaturated organic groups;   (b) a functional fluorosilicone polymer; and   (c) a nonfunctional fluorosilicone polymer.   
     
     
         2 . The composition of  claim 1 , wherein the blend comprises at least 50 weight percent of the functional, non-fluorinated, silicone polymer based on the total weight of (a) and (b). 
     
     
         3 . The composition of  claim 1 , wherein the blend comprises at least 3 weight percent of the functional fluorosilicone polymer based on the total weight of (a) and (b). 
     
     
         4 . The composition of  claim 1 , wherein the blend comprises at least 1 part by weight of the nonfunctional fluorosilicone polymer per 100 parts by weight of (a) and (b). 
     
     
         5 . The composition of  claim 1 , wherein a ratio of the vinyl equivalent weight of the functional fluorosilicone polymer over the vinyl equivalent weight of the functional non-fluorinated silicone polymer is at least 1. 
     
     
         6 . The composition of  claim 5 , wherein the ratio of the vinyl equivalent weight of the functional fluorosilicone polymer to the vinyl equivalent weight of the functional non-fluorinated silicone polymer is from 2 to 20. 
     
     
         7 . The composition of  claim 1 , wherein the nonfunctional fluorosilicone polymer comprises one or more fluorinated groups having two or more fluorinated carbon atoms. 
     
     
         8 . The composition of  claim 1 , wherein the functional fluorosilicone polymer comprises fluorinated groups comprising two or more fluorinated carbon atoms. 
     
     
         9 . The composition of  claim 1 , wherein the blend comprises:
 (a) at least 80 to no greater than 95 weight percent based on the total weight of (a) and (b) of the functional, non-fluorinated, silicone polymer;   (b) at least 5 to no greater than 20 weight percent based on the total weight of (a) and (b) of the functional fluorosilicone polymer, and wherein the functional fluorosilicone polymer comprises at least two ethylenically-unsaturated groups; and   (c) at least 1 to no greater than 15 parts by weight of the nonfunctional fluorosilicone polymer based on 100 parts by weight of (a) and (b).   
     
     
         10 . An adhesive article comprising a release liner comprising a substrate; the cured release material according to  claim 9  bonded to at least a portion of at least one surface of the substrate; and a silicone adhesive in contact with at least a portion of at least one surface of the cured release material. 
     
     
         11 . An adhesive article comprising:
 a substrate;   a cured release material bonded to at least a portion of at least one surface of the substrate, wherein the cured release material comprises a reaction product of a blend of (a) a functional, non-fluorinated, silicone polymer comprising at least two ethylenically unsaturated organic groups; (b) a functional fluorosilicone polymer; and (c) a nonfunctional fluorosilicone polymer; and   a silicone adhesive in contact with at least a portion of at least one surface of the cured release material.   
     
     
         12 . The adhesive article of  claim 11 , wherein silicone adhesive comprises a silicone block copolymer or an e-beam cured silicone adhesive or a peroxide-cured silicone adhesive. 
     
     
         13 . The adhesive article of  claim 11 , wherein the silicone adhesive is a silicone polyurea adhesive. 
     
     
         14 . The adhesive article of  claim 11 , wherein the silicone adhesive is a polydiorganosiloxane-polyoxamide adhesive. 
     
     
         15 . The adhesive article of  claim 11 , wherein the silicone adhesive comprises a tackifier. 
     
     
         16 . A method of forming an adhesive article comprising: applying an uncured solventless silicone adhesive to a release liner and curing the silicone adhesive, and wherein the release liner comprises a substrate and a cured release material comprising a fluorosilicone polymer bonded to at least a portion of at least one surface of the substrate. 
     
     
         17 . The method of  claim 16 , wherein the uncured silicone adhesive further comprises a tackifier. 
     
     
         18 . The method of  claim 16 , wherein the uncured silicone adhesive comprises a silicone block copolymer, an e-beam curable silicone adhesive, or a peroxide-cured silicone adhesive. 
     
     
         19 . The method of  claim 16 , wherein the curing of the silicone adhesive is performed using e-beam curing or peroxide-curing. 
     
     
         20 . The method of  claim 16 , wherein the fluorosilicone polymer comprises a reaction product of a blend of (a) a functional, non-fluorinated, silicone polymer comprising at least two ethylenically unsaturated organic groups; (b) a functional fluorosilicone polymer; and (c) a nonfunctional fluorosilicone polymer.