| 摘要 |
PURPOSE:To provide the titled (meth)acrylate composed of the reaction product of a specific hydroxyl-containing cyclic compound, an organic polyisocyanate and a hydroxyl-containing (meth)acrylate compound, and giving a cured product having excellent color, hardness and scratch resistance. CONSTITUTION:The objective urethane poly(meth)acrylate is composed of the reaction product of (A) the compound of formula I (R1 is CH3, C2H5 or C3H7) (e.g. the compound of formula II), (B) an organic polyisocyanate such as isophorone diisocyanate, and (C) the compound of formula III or formula IV (R2 and R3 are H or CH3; n is 1-20) and/or a compound having one or more OH groups and obtained by the esterification of a polyol and (meth)acrylic acid (e.g. pentaerythritol triacrylate).
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