(meth)acrylate composition

Abstract

Provided is a (meth)acrylate composition containing: (A) at least one (meth)acrylate compound selected from the group consisting of a (meth)acrylate-modified silicone oil, a (meth)acrylate having a long-chain aliphatic hydrocarbon group, and a polyalkylene glycol (meth)acrylate having number-average molecular weight of not less than 400; (B) a (meth)acrylate compound to which an alicyclic hydrocarbon group having 6 or more carbon atoms is ester-linked; (C) (meth)acrylic acid or a (meth)acrylate compound having a polar group; (D) a radical polymerization initiator; and (E) a white pigment.

1 . A (meth)acrylate composition comprising:
 (A) at least one (meth)acrylate compound selected from the group consisting of a (meth)acrylate-modified silicone oil, a (meth)acrylate comprising a long-chain aliphatic hydrocarbon group, and a polyalkylene glycol (meth)acrylate having number-average molecular weight of not less than 400,   (B) a (meth)acrylate compound ester-linked to an alicyclic hydrocarbon group having 6 or more carbon atoms,   (C) (meth)acrylic acid or a (meth)acrylate compound comprising a polar group,   (D) a radical polymerization initiator, and   (E) a white pigment.   
     
     
         2 . The (meth)acrylate composition according to  claim 1 , wherein
 an amount of the at least one (meth)acrylate compound (A) is from 5 to 90% by mass, an amount of the (meth)acrylate compound ester-linked to an alicyclic hydrocarbon group (B) is from 5 to 90% by mass, and an amount of the (meth)acrylic acid or (meth)acrylate compound (C) is from 0.5 to 50% by mass, based on a totality of components (A), (B) and (C), and   an amount of the radical polymerization initiator (D) is from 0.01 to 10 parts by mass and an amount of the white pigment (E) is from 3 to 200 parts by mass, relative to 100 parts by mass of a totality of the components (A), (B) and (C).   
     
     
         3 . The (meth)acrylate composition according to  claim 1 , wherein the at least one (meth)acrylate compound (A) is a (meth)acrylate having an aliphatic hydrocarbon group with 12 or more carbon atoms, a polyalkylene glycol (meth)acrylate having number-average molecular weight of not less than 400, or any combination thereof. 
     
     
         4 . The (meth)acrylate composition according to  claim 1 , wherein the at least one (meth)acrylate compound (A) is a hydrogenated polybutadiene di(meth)acrylate, hydrogenated polyisoprene di(meth)acrylate, a polyethylene glycol di(meth)acrylate having number-average molecular weight of not less than 400, or any combination thereof. 
     
     
         5 . The (meth)acrylate composition according to  claim 1 , wherein the (meth)acrylate compound ester-linked to an alicyclic hydrocarbon group (B) is a (meth)acrylate compound ester-linked with at least one alicyclic hydrocarbon group selected from the group consisting of adamantyl, norbornyl, isobornyl, dicyclopentanyl, and cyclohexyl. 
     
     
         6 . The (meth)acrylate composition according to  claim 1 , wherein the (meth)acrylic acid or (meth)acrylate compound (C) is a (meth)acrylate compound comprising a polar group selected from the group consisting of hydroxyl, epoxy, glycidyl ether, tetrahydrofurfuryl, isocyanate, carboxyl, alkoxysilyl, phosphate ester, lactone, oxetane, and tetrahydropyranyl. 
     
     
         7 . A cured product obtained by a process comprising curing the (meth)acrylate composition according to  claim 1 . 
     
     
         8 . A reflective material comprising the cured product according to  claim 7 . 
     
     
         9 . The reflective material according to  claim 8 , wherein the reflective material is suitable for an optical semiconductor. 
     
     
         10 . The (meth)acrylate composition according to  claim 3 , wherein the (meth)acrylate compound ester-linked to an alicyclic hydrocarbon group (B) is a (meth)acrylate compound ester-linked with at least one alicyclic hydrocarbon group selected from the group consisting of adamantyl, norbornyl, isobornyl, dicyclopentanyl, and cyclohexyl. 
     
     
         11 . The (meth)acrylate composition according to  claim 3 , wherein the (meth)acrylic acid or (meth)acrylate compound (C) is a (meth)acrylate compound comprising a polar group selected from the group consisting of hydroxyl, epoxy, glycidyl ether, tetrahydrofurfuryl, isocyanate, carboxyl, alkoxysilyl, phosphate ester, lactone, oxetane, and tetrahydropyranyl. 
     
     
         12 . The (meth)acrylate composition according to  claim 10 , wherein the (meth)acrylic acid or (meth)acrylate compound (C) is a (meth)acrylate compound comprising a polar group selected from the group consisting of hydroxyl, epoxy, glycidyl ether, tetrahydrofurfuryl, isocyanate, carboxyl, alkoxysilyl, phosphate ester, lactone, oxetane, and tetrahydropyranyl.