Polymerizable composition and dental material

Abstract

The present invention provides a polymerizable composition that is suitably used as a temporary cement for implant use and a mobile tooth-fixing material. The present invention is a polymerizable composition that includes an acrylic block copolymer (a) having at least one polymer block A that mainly contains a (meth)acrylic acid ester unit and that functions as a hard segment and at least one polymer block B that mainly contains an acrylic acid ester unit and that functions as a soft segment, a polymerizable monomer (b), and a polymerization initiator (c).

1 . A polymerizable composition comprising:
 an acrylic block copolymer (a) having at least one polymer block A that mainly contains a (meth)acrylic acid ester unit and that functions as a hard segment, and at least one polymer block B that mainly contains an acrylic acid ester unit and that functions as a soft segment;   a polymerizable monomer (b), and   a polymerization initiator (c),   wherein the acrylic block copolymer (a) has a molecular weight distribution Mw/Mn of 1.0 to 1.5, the acrylic block copolymer (a) is inactive against a polymerizable group of the polymerizable monomer (b), and polymerization initiator (c) comprises a chemical polymerization initiator (c-2).   
     
     
         2 . The polymerizable composition according to  claim 1 , wherein the acrylic block copolymer (a) has a molecular weight distribution Mw/Mn of 1.0 to 1.3. 
     
     
         3 . (canceled) 
     
     
         4 . The polymerizable composition according to  claim 1 , wherein the polymerizable monomer (b) is a (meth)acrylate polymerizable monomer. 
     
     
         5 . The polymerizable composition according to  claim 1 , further comprising:
 a polymerization accelerator (d).   
     
     
         6 . The polymerizable composition according to  claim 1 , further comprising:
 a filler (e).   
     
     
         7 . The polymerizable composition according to  claim 1 , being used for application to biological tissues. 
     
     
         8 . A dental cement comprising the polymerizable composition according to  claim 1 . 
     
     
         9 . The dental cement according to  claim 8 , wherein the dental cement is a temporary cement for implant use. 
     
     
         10 . A dental mobile tooth-fixing material comprising the polymerizable composition according to  claim 1 . 
     
     
         11 . A dental composite resin comprising the polymerizable composition according to  claim 1 . 
     
     
         12 . The polymerizable composition according to  claim 1 , wherein said chemical polymerization initiator (c-2) is at least one selected from the group consisting of ketone peroxide, hydroperoxide, diacyl peroxide, dialkyl peroxide, peroxyketal, peroxyester, and peroxydicarbonate.