Method for producing (meth) acrylic acid ester polymer

Abstract

There is provided a (meth) acrylic ester polymer having A silicon-containing functions group capable of crosslinking Through formation of a siloxane bond, or a composition comprising the polymer, which does not contain any environment-hostile aromatic compound derived from a solvent, and of which TVOC (total volatile organic compound) emission is less than 1,500·g/m 3 . There is further provided a method for producing a polymer comprising a (meth) acrylic ester monomer unit as a molecular chain and having a silicon-containing functional group capable of crosslinking through formation of a siloxane bond, which comprises polymerizing a (meth)acrylic ester monomer using a solvent not containing any aromatic solvents as a polymerization solvent.

1 . A method for producing a polymer comprising a (meth)acrylic ester monomer unit as a molecular chain and having a silicon-containing functional group capable of crosslinking through formation of a siloxane bond, 
 which comprises polymerizing the (meth)acrylic ester monomer using a solvent not containing any aromatic solvents as a polymerization solvent.    
     
     
         2 . The method according to  claim 1 , 
 wherein the polymerization solvent is one or more members selected from the group consisting of alcohol solvents and carbonyl group-containing solvents.    
     
     
         3 . The method according to  claim 2 , 
 wherein the polymerization solvent is one or more members selected from the group consisting of aliphatic alcohols containing 3 or 4 carbon atoms and dialkyl carbonates.    
     
     
         4 . The method according to  claim 1 , 
 wherein the (meth)acrylic ester monomer is a mixture of    (1) an alkyl (meth)acrylate monomer containing an alkyl group of 1 to 8 carbon atoms and    (2) an alkyl (meth)acrylate monomer containing an alkyl group containing 10 or more carbon atoms.    
     
     
         5 . A method for producing a polymer comprising a (meth)acrylic ester monomer unit as a molecular chain and having a silicon-containing functional group capable of crosslinking through formation of a siloxane bond, 
 which comprises polymerizing the (meth)acrylic ester monomer using a polymerization solvent containing one or more members selected from the group consisting of aliphatic alcohols containing 3 or 4 carbon atoms and dialkyl carbonates but not containing an aromatic compound in a concentration over 1,000 ppm based on the polymer.    
     
     
         6 . The method according to  claim 1 , 
 wherein the polymerization solvent is 2-propyl alcohol.    
     
     
         7 . The method according to  claim 1 , 
 wherein the polymerization solvent is dimethyl carbonate.    
     
     
         8 . The method according to  claim 1 , 
 wherein 2,2′-azobis(dimethylvaleronitrile) is used as a polymerization initiator.    
     
     
         9 - 17 . (canceled).  
     
     
         18 . The method according to  claim 2 , 
 wherein the (meth)acrylic ester monomer is a mixture of    (1) an alkyl (meth)acrylate monomer containing an alkyl group of 1 to 8 carbon atoms and    (2) an alkyl (meth)acrylate monomer containing an alkyl group containing 10 or more carbon atoms.    
     
     
         19 . The method according to  claim 3 , 
 wherein the (meth)acrylic ester monomer is a mixture of    (1) an alkyl (meth)acrylate monomer containing an alkyl group of 1 to 8 carbon atoms and    (2) an alkyl (meth)acrylate monomer containing an alkyl group containing 10 or more carbon atoms.    
     
     
         20 . The method according to  claim 5 , 
 wherein 2,2′-azobis(dimethylvaleronitrile) is used as a polymerization initiator.