Preparation of a Nanoscale Color Index Pigment Orange 13/Styrene-Maleic Acid Copolymer Composite Dispersion for Ink Jet Printing

摘要

Color Index pigment orange 13 (PO13) modified with styrene-maleic acid copolymer (PSMA) was prepared via phase separation technique. Experimental results showed that a dispersion with small particle size and high centrifugal stability could be obtained using number molecular weight (M_n) of PSMA at 22,500, the weight ratio of PSMA to pigment (R_(C/P)) at 0.24, and pigment content (C_P at 15%. The particles were small and uniformly dispersed in aqueous media. The PO13/PSMA dispersion had high stability and exhibited an improved printing performance when it was applied to preparation of ink jet printing ink.