| abstract |
(57) Abstract: [PROBLEMS] To provide an aqueous iron-based dispersant that does not contain phosphorus, does not form polyvalent metal ions and insoluble salts, has an excellent dispersing effect, and continues the effect. A conjugated diene sulfonic acid represented by the general formula [1] and / or a salt thereof (Wherein, R 1 to R 6 is hydrogen, methyl or -SO 3 X 1, and one or more methyl groups of R 1 to R 6, R 1 to R 6 One or more is -SO 3 X 1. ), And (meta) An aqueous iron dispersant containing a copolymer synthesized from acrylic acid and / or a salt thereof. |