(Meth)acrylate and use thereof

A (meth)acrylate (D) which is a reaction product of:

• a thiol compound (A) having three or four mercapto groups;
• an iso (thio) cyanate compound (B) having two or more iso (thio) cyanato groups;
• and
• a hydroxy (meth)acrylate compound (C) having one or more polymerizable groups,
• wherein the (meth)acrylate (D) is represented by the following general formula (1):
• wherein
• R1 is a residue excluding all mercapto groups from a thiol compound (A1) having three or four mercapto groups;
• R1 is a group represented by the following formula (2), (3), (4-1), (4-2), or (4-3);
• R2 is a group represented by the following formula (5), (6), (7), or (8):
• R3 is a residue excluding one (meth)acryloyloxy group and one hydroxy group from the hydroxy (meth)acrylate compound (C);
• R4 represents a hydrogen atom or a methyl group;
• X represents an oxygen atom or a sulfur atom;
• n represents a number of all the mercapto groups contained in the thiol compound (A1);
• and
• a plurality of R2, R3, R4, and X may each be the same as or different from each other.