EMULSION BINDER AQUEOUS PIGMENT INK FOR INKJET CONTAINING SAME AND METHOD FOR PRODUCING EMULSION BINDER

摘要

The present invention is an emulsion binder containing an A-B block copolymer. Wherein the AB block copolymer has a number average molecular weight of 5,000 to 100,000 and a molecular weight distribution (weight average molecular weight / number average molecular weight) of 1.7 or less and an acid value of the A polymer block of 0 to 30 mgKOH / g, The acid value of the B polymer block is 75 to 250 mgKOH / g, the AB block copolymer is neutralized with an alkali substance and is self-emulsified in an aqueous medium, and emulsion particles having an average particle diameter of 30 to 300 nm Respectively.