SILSESQUIOXANE DERIVATIVE HAVING RADICAL POLYMERIZABLE FUNCTIONAL GROUP, COMPOSITION THEREOF, AND CURED FILM HAVING LOW CURE SHRINKAGE

摘要

The purpose of the present invention is to provide a novel compound capable of imparting a low cure shrinkage while suppressing a decrease in the hardness (scratch resistance) of a cured film obtained from a resin composition. Provided is a silsesquioxane derivative having a radical polymerizable functional group, represented by formula (1), (2), or (3). In formulae (1)-(3), R¹ is a group independently selected from among a C1-45 alkyl, a C4-8 cycloalkyl, a C6-14 aryl, and a C7-24 arylalkyl, R² and R³ are groups independently selected from among a C1-10 alkyl, a cyclopentyl, a cyclohexyl, and a phenyl, X is independently a hydrogen or a monovalent organic group, and at least one in X is a radical polymerizable functional group represented by formula (4).