Water-soluble composition, production method for cured product thereof, and cured product thereof, and acyl phosphinate

An acylphosphinate represented by the following Formula (I):

• wherein, X1 represents an aryl group having 6 to 15 carbon atoms;
• hydrogen atoms in the group represented by X1 are each optionally substituted with a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, a linear halogenated alkyl group having 1 to 8 carbon atoms, a branched halogenated alkyl group having 3 to 8 carbon atoms, a linear alkoxy group having 1 to 8 carbon atoms, a branched alkoxy group having 3 to 8 carbon atoms, a linear halogenated alkoxy group having 1 to 8 carbon atoms, or a branched halogenated alkoxy group having 3 to 8 carbon atoms;
• X2 represents a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, a linear alkoxy group having 1 to 8 carbon atoms, a branched alkoxy group having 3 to 8 carbon atoms, or an aryl group having 6 to 15 carbon atoms;
• hydrogen atoms in the aryl group having 6 to 15 carbon atoms that is represented by X2 are each optionally substituted with a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, a linear halogenated alkyl group having 1 to 8 carbon atoms, a branched halogenated alkyl group having 3 to 8 carbon atoms, a linear alkoxy group having 1 to 8 carbon atoms, a branched alkoxy group having 3 to 8 carbon atoms, a linear halogenated alkoxy group having 1 to 8 carbon atoms, a branched halogenated alkoxy group having 3 to 8 carbon atoms, a halogen atom, a nitro group, a cyano group, a hydroxy group, an amino group, a carboxyl group, a methacryloyl group, an acryloyl group, an epoxy group, a vinyl group, a vinyl ether group, a mercapto group, an isocyanate group, or a heterocycle-containing group;
• a methylene group in the group represented by X2 is optionally substituted with oxygen atom or a sulfur atom;
• Am+ represents an alkali metal ion, an alkaline earth metal ion, or N+HY1Y2Y3;
• Y1, Y2 and Y3 each independently represent a hydrogen atom, a hydroxy group, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 1 to 6 carbon atoms, an aryl group having 6 to 15 carbon atoms, or an arylalkyl group having 7 to 13 carbon atoms;
• methylene groups in the groups represented by Y1, Y2 and Y3 are each optionally substituted with a sulfur atom or a carbonyl group;
• one or more combinations of Y1 and Y2, Y1 and Y3, and Y2 and Y3 are optionally bound with each other to form a ring;
• and
• m represents a number of 1 to 3,
• wherein,
• in the Formula (I), X2 is a phenyl group and Am+ is N+HY1Y2Y3, and
• one or more combinations of Y1 and Y2, Y1 and Y3, and Y2 and Y3 are bound with each other to form a ring;
• and
• wherein,
• at least one hydrogen atom of Y1, Y2 and Y3 is substituted with a hydroxy group.