FABRIC PRETREATMENT FOR DIGITAL PRINTING

摘要

An aqueous polymer dispersion with nonionic colloidal stabilization, polyvalent metal ion, coagulating acid, and an optional mono or polyhydric alcohols and/or alkylene-oxide oligomers (humectants or surface tension modifiers), and optional surfactant are disclosed for use as pretreatment for substrates such as textiles and garments.

主权项

1. An aqueous substrate pretreatment comprising;
a) about 1 to about 20 or 30 wt. % of at least one synthetic polymer (e.g. a non-ionic acrylic, ethylene-vinyl acetate, urethane or mixtures thereof), in the form a nonionically stabilized aqueous polymer dispersion having colloidal stability in polyvalent metal ions, said wt. % based on the total weight of said pretreatment, b) about 0.1 or 0.2 to about 15 wt. % of a water soluble polyvalent metal salt wherein said metal is selected from column 2-12 of the standard periodic table, c) an organic and/or inorganic acid component in an amount from about 0.1 to about 10 wt. % based on the weight of the pretreatment, and used in an amount sufficient to adjust said aqueous pretreatment to a pH from 1.5 to 5.0, d) optionally d1) mono or polyhydric alcohols and/or alkylene-oxide oligomers, and optionally d2) surfactant.