Synthesis and characterization of polymeric modified aldehydes for printing inks applications

Abstract

In this study, different nucleophiles (resorcinol, cyclohexanone, paminobenzoic acid) were reacted with four different aldehyde (formaldehyde, butyraldehyde, N,N-dimethylaminobenzaldehyde and glutaraldehyde) to form a nucleophile-aldehyde resins. These resins were then reacted with an amine terminated polyether under Mannich conditions to prepare dispersing agents for solvent based inkjet inks. The prepared polymers were characterized using FTIR and GPC. The prepared polymers were employed as new polymeric dispersants for pigment dispersion in solvent based inkjet inks. Particle size of the prepared inks as well as the optical properties of their dried films was studied. The efficiency of the prepared dispersants was evaluated against a blank sample and commercial dispersing agent. Dispersants R-1, R-4 and R-5 provided the best results in carbon black inkjet inks among the prepared dispersants. While dispersants A- 4, A-5, R-1, R-4 and R-5 provided the best results in cyan 15:3 inkjet inks among the prepared dispersants. Key words: Inkjet ink, Dispersant, Aldehyde, Pigment, Solvent based.