PROBLEM TO BE SOLVED: To provide a polymerizable monomer that has low polymerization shrinkage during curing, excellent flexural strength of cured product, and a high refractive index, and is useful especially as a dental restoration material.SOLUTION: The polymerizable monomer is represented by general formula (1) {wherein R1, R2, R3 and R4 are each a group represented by general formula (2) (wherein Y1, Y2, Y3, Y4 and Y5 are each independently a hydrogen atom, a halogen atom or a 1-6C alkyl group) or a 1-6C alkyl group, where at least one is the group represented by general formula (2) R5 and R6 are each independently a hydrogen atom or a methyl group X1 and X2 are each independently an oxygen atom, a sulfur atom or NH and k and l are each independently an integer of 2-12}.COPYRIGHT: (C)2009,JPO&INPIT【課題】硬化時の重合収縮が小さく、硬化物の曲げ強度に優れ、かつ高い屈折率を有し、特に歯科用修復材料に有用な重合性単量体を提供する。【解決手段】下記一般式(1)で表される重合性単量体(式中、各記号の定義は、明細書中と同義である)。【選択図】なし
