Dispersive reactive dye digital printing ink and preparation method thereof

The invention relates to the technical field of preparation of digital printing ink, and discloses dispersed reactive dye digital printing ink and a preparation method thereof. The method comprises the following steps: (1) preparing raw materials including a reactive dye, an associative dispersant, short-chain fatty alcohol and deionized water; (2) mixing short-chain fatty alcohol with deionized water to obtain a short-chain fatty alcohol aqueous solution; (3) mixing the reactive dye with deionized water and the short-chain fatty alcohol aqueous solution to prepare a reactive dye dilute solution; (4) mixing the associative dispersant with deionized water and the short-chain fatty alcohol aqueous solution to prepare an associative dispersant concentrated solution; and (5) mixing the reactive dye dilute solution with the associative dispersant concentrated solution to prepare the dispersive reactive dye digital printing ink. According to the invention, a uniform and stable reactive dye oligomer dispersion liqui