| 摘要 |
A photocurable composition comprising the following components (A) to (D): (A) at least one of the (meth) acrylates having the structures shown by the formulas: (I) and (II), wherein R1 represents a hydrogen atom or a halogen atom excluding a fluorine atom, R2 is a hydrogen atom, a halogen atom excluding a fluorine atom, Ph-C(CH3)2-, Ph-, or an alkyl group having 1-20 carbon atoms, and R3 represents -CH 2-, -S-, or -C(CH3)2-; (B) a (meth)acrylate having three or more functional groups, excluding the (meth)acrylates of the component (A); (C) a radical photoinitiator; and (D) a polycarbonate polyol having a hydroxyl value of 10-100; wherein 5-50 wt % of the total acrylic components in the composition are methacrylate compounds. A photocurable composition produces a cured product possessing a high refractive index, excelling in heat resistance, showing only a small amount of warping, and being particularly useful as an optical part such as a prism lens sheet.
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