The heat- or energy ray-curable composition for members contains an onium gallate salt having a specific structure. The invention is a heat- or energy ray-curable composition comprising a cationic polymerizable compound and an acid generator containing an onium gallate salt represented by general formula (1). In formula (1), R
1
-R
4
are each independently an alkyl group having 1 to 18 carbon atoms or Ar; however, at least one is Ar; Ar is an aryl group having 6 to 14 carbon atoms (not including the number of carbon atoms in the following substituents); some of the hydrogen atoms in the aryl group may be substituted by alkyl groups having 1 to 18 carbon atoms or the like; E represents an element of valence n of group 15 to group 17 (IUPAC notation); n is an integer of 1-3; and R
5
is an organic group bonded to E.
该成员的热固化或能量光固化组合物包含具有特定结构的
酚酸盐。该发明是一种热固化或能量光固化组合物,包括阳离子可聚合化合物和含有由通式(1)表示的
酚酸盐的酸发生剂。在通式(1)中,R1-R4分别是具有1至18个碳原子的烷基基团或Ar;但至少有一个是Ar;Ar是具有6至14个碳原子的芳基团(不包括以下取代基中的碳原子数);芳基团中的一些氢原子可以被具有1至18个碳原子的烷基基团或类似物所取代;E表示15族到17族(IU
PAC符号)的n价元素;n是1-3的整数;R5是与E结合的有机基团。