| abstract |
A composition which comprises a polythiol compound, a (meth)acrylic compound having multiple acryloyl and/or methacryloyl groups and having a cyclic structure, and a radical generator, wherein the ratio of the total number of moles (Ac) of the acryloyl and/or methacryloyl groups contained in the (meth)acrylic compound to the total number of moles (SH) of the thiol groups contained in the polythiol compound, Ac/SH, is 0.20 or greater but less than 0.70. |