Method For Improving The Edging Of An Optical Article By Providing A Temporary Layer Of An Organic Matter

Abstract

Methods for edging optical articles comprising two main faces, at least one of which being coated with an outermost layer comprising fixing the optical article to a chuck with a holding pad that adheres to both the optical article and the chuck, wherein the surface of the holding pad contacting the optical comprises an adhesive material; and edging the optical article with an edging device; wherein prior to fixing the optical article to the chuck, at least one temporary layer of an organic material is formed onto said outermost layer of the optical article, the organic material of the temporary layer comprising at least one organic compound having a fluorinated functional moiety and at least one linking functional moiety capable of establishing at least one intermolecular bond or interaction with the adhesive material of the holding pad. Optical articles obtained via these methods.

1 . An optical article having two main faces, at least one of which is coated with an outermost layer, wherein at least one temporary layer of an organic material is formed on said outermost layer of said optical article, the organic material of the temporary layer comprising at least one organic compound having a fluorinated functional moiety, and a linking functional moiety capable of establishing at least one intermolecular bond or interaction. 
     
     
         2 . The optical article of  claim 1 , wherein said at least one organic compound has a main chain with two terminal positions, the first terminal position being occupied by the fluorinated functional moiety, and the second terminal position being occupied by the linking functional moiety capable of establishing at least one intermolecular bond or interaction. 
     
     
         3 . The optical article of  claim 1 , wherein said outermost layer of the optical article is an anti-fouling top coat. 
     
     
         4 . The optical article of  claim 3 , wherein the anti-fouling top coat is a hydrophobic and/or oleophobic surface coating. 
     
     
         5 . The optical article of  claim 4 , wherein the hydrophobic and/or oleophobic surface coating is deposited on a mono- or multilayered anti-reflection coating or on a hard coating. 
     
     
         6 . The optical article of  claim 1 , wherein the fluorinated functional moiety is a linear perfluoroalkyl group with less than four carbon atoms. 
     
     
         7 . The optical article of  claim 1 , wherein the linking functional moiety of said organic compound is capable of establishing at least one intermolecular bond or interaction with an adhesive material of a holding pad. 
     
     
         8 . The optical article of  claim 7 , wherein the linking functional moiety is able to form at least one hydrogen bond with the adhesive material of said holding pad. 
     
     
         9 . The optical article of  claim 7 , wherein the adhesive material is a pressure sensitive adhesive (PSA). 
     
     
         10 . The optical article of  claim 1 , wherein the fluorinated functional moiety and the linking functional moiety are connected with a linking arm selected from the group consisting of:
 alkylene groups, linear or branched, substituted or not substituted;   cycloalkylene groups, substituted or not substituted;   alkenylene or alkynylene groups, substituted or not substituted;   divalent heteroarylene groups, substituted or not substituted;   arylene groups, substituted or not substituted;   acyl(cyclo)alkylene groups, acyl(cyclo)alkenylene groups, acyl(cyclo)alkynylene groups, acyl(cyclo)arylene groups, the acyl function being —C(O)—;   acyloxy(cyclo)alkylene groups, acyloxy(cyclo)alkenylene groups, acyloxy(cyclo) alkynylene groups, acyloxy(cyclo)arylene groups, the acyloxy function being —C(O)O—;   oxy(cyclo)alkylene groups, oxy(cyclo)alkenylene groups, oxy(cyclo)alkynylene groups, oxy(cyclo)arylene groups;   thio(cyclo)alkylene groups, thio(cyclo)alkenylene groups, thio(cyclo)alkynylene groups, thio(cyclo)arylene groups, sulfo (—SO 2 —) derivatives thereof, sulfoxy (—S(O)—) derivatives thereof;
 amino(cyclo)alkylene groups, amino(cyclo)alkenylene groups, amino(cyclo)alkynylene groups, amino(cyclo)arylene groups; 
   alkylamino(cyclo)alkylene groups, alkylamino(cyclo)alkenylene groups, alkylamino(cyclo) alkynylene groups, alkylamino(cyclo)arylene groups;   arylamino(cyclo)alkylene groups, arylamino(cyclo)alkenylene groups, arylamino(cyclo) alkynylene groups, arylamino(cyclo)arylene groups;   NHC(O), OC(O), C(O), NHS(O) 2 , NHS(O), OC(O)OC(O), C(O)C(O) groups, which may be connected to the fluorinated functional moiety (R F,H ) group as defined below:   
       
         
           
           
               
               
           
         
         diorganosilylene groups, optionally substituted with an alkylene, arylene, alkenylene or alkynylene group; and 
       
       combinations of groups from the same or a different category. 
     
     
         11 . The optical article of  claim 1 , wherein the fluorinated functional moiety and the linking functional moiety are connected with a C 1 -C 4  n-alkyl group. 
     
     
         12 . The optical article of  claim 1 , wherein the temporary layer imparts to the optical article a surface energy of at least 12 mJ/m 2 . 
     
     
         13 . The optical article of  claim 12 , wherein the temporary layer imparts to the optical article a surface energy of at least 15 mJ/m 2 . 
     
     
         14 . The optical article of  claim 1 , wherein the temporary layer imparts to the optical article a surface energy of 12 to 15 mJ/m 2  and an hysteresis of the water contact angle of at least 8°. 
     
     
         15 . The optical article of  claim 14 , wherein the temporary layer imparts to the optical article a surface energy of 12 to 15 mJ/m 2  and an hysteresis of the water contact angle of at least 9°. 
     
     
         16 . The optical article of  claim 15 , wherein the temporary layer imparts to the optical article a surface energy of 12 to 15 mJ/m 2  and an hysteresis of the water contact angle of at least 10°. 
     
     
         17 . The optical article of  claim 1 , wherein the physical thickness of the temporary layer ranges from 5 to 50 nm. 
     
     
         18 . The optical article of  claim 1 , wherein the outermost layer of the optical article has a surface energy lower than or equal to 14 mJoules/m 2 . 
     
     
         19 . The optical article of  claim 1 , wherein the outermost layer of the optical article has a surface energy lower than or equal to 12 mJoules/m 2 .