| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealant having excellent heat resistance, heat discoloration resistance and transparency, and being excellent in curability even under a relatively low-temperature environment.SOLUTION: The sealant contains a (meth)acryloyl group-containing polyurethane (A) having a structure represented by formula (I) and a radically polymerizable unsaturated monomer (B). In the formula (I), Z is an aliphatic cyclic structure-containing alkylene group having a molecular weight of 65 to 265; T is an aliphatic cyclic structure-containing alkylene group or a chain alkylene group; and M is an atomic group containing a (meth)acryloyl group. |
