| 摘要 |
PROBLEM TO BE SOLVED: To provide a urethane (meth)acrylate copolymer excellent in the sense of solving problems of the deficiency of simultaneously meeting tensile strength and elongation demands and of a rubbery elasticity loss.SOLUTION: In the provided urethane (meth)acrylate copolymer, a polyol compound including a polycarbonate diol having a hydroxyl value of 20-75 mgKOH/g and possessing an alkylene group wherein multiple methylene groups are linked in a state where the number of methylene groups not coupled with oxygen is equal to or greater than the number of methylene groups coupled with oxygen within the alkylene group; a polyisocyanate compound including a polyisocyanate component selected from the group consisting of acyclic aliphatic polyisocyanates, alicyclic polyisocyanates, and their mixtures; and a hydroxyl group-containing (meth)acrylate are coupled via copolymerization. |
