Another type of reactive surfactant that may be suitable for use in the present invention are surfactants having formula (7) below: wherein: a, b, and m are each any number; AO is an oxyalkylene group or oxy(alkoxymethyl)ethylene group; and M is a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, ammonium, a residual group of an alkyl amine, or a residual group of an alkanolamine.