Ultraviolet curable silicone composition and cured product thereof

Abstract

Provided are a low-viscosity ultraviolet curable silicone composition capable of being used even in a surface exposure method and a lift-up method etc.; and a cured product superior in tensile strength and elongation at break. The ultraviolet curable silicone composition contains:(A) an organopolysiloxane;(B) a photopolymerization initiator; and(C) a monofunctional (meth)acrylate compound having no siloxane structure and/or (D) a multifunctional (meth)acrylate compound having no siloxane structure, wherein the organopolysiloxane is represented by the following general formula (1):wherein n satisfies 1≤n≤1,000, m satisfies 1≤m≤1,000, Ar is an aromatic group, R1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, A is a group represented by the following formula (2):wherein p satisfies 0≤p≤10, a satisfies 1≤a≤3, R1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, R2 represents an oxygen atom or an alkylene group, R3 represents an acryloyloxyalkyl group or the like.

1 . An ultraviolet curable silicone composition comprising:
 (A) 100 parts by mass of an organopolysiloxane;   (B) 0.1 to 10 parts by mass of a photopolymerization initiator; and   1 to 400 parts by mass of at least one of (C) a monofunctional (meth)acrylate compound having no siloxane structure and (D) a multifunctional (meth)acrylate compound having no siloxane structure, wherein the organopolysiloxane is represented by the following general formula (1):   
       
         
           
           
               
               
           
         
         wherein n is a number satisfying 1≤n≤1,000, m is a number satisfying 1≤m≤1,000, siloxane units identified by n and m are sequenced in any order, Ar is an aromatic group, each R 1  independently represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, A is a group represented by the following formula (2): 
       
       
         
           
           
               
               
           
         
         wherein p is a number satisfying 0≤p≤10, a is a number satisfying 1≤a≤3, each R 1  independently represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, R 2  represents an oxygen atom or an alkylene group, R 3  represents an acryloyloxyalkyl group, a methacryloyloxyalkyl group, an acryloyloxyalkyloxy group or a methacryloyloxyalkyloxy group. 
       
     
     
         2 . The ultraviolet curable silicone composition according to  claim 1 , wherein R 1  in the general formula (1) represents an alkyl group having 1 to 10 carbon atoms. 
     
     
         3 . The ultraviolet curable silicone composition according to  claim 1 , wherein the ultraviolet curable silicone composition has a viscosity of not higher than 10,000 mPa·s at 25° C. 
     
     
         4 . A cured product of the ultraviolet curable silicone composition according to  claim 1 . 
     
     
         5 . (canceled) 
     
     
         6 . The ultraviolet curable silicone composition according to  claim 2 , wherein the ultraviolet curable silicone composition has a viscosity of not higher than 10,000 mPa·s at 25° C. 
     
     
         7 . A cured product of the ultraviolet curable silicone composition according to  claim 2 . 
     
     
         8 . A cured product of the ultraviolet curable silicone composition according to  claim 3 . 
     
     
         9 . A cured product of the ultraviolet curable silicone composition according to  claim 6 .