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6607951 
Book/Book Chapter 
Styrene maelic anhydride imide resin (SMAI): a novel cationic additive in paper coating for ink-jet printing 
Sreekumar, J; Sain, M; Farnood, R; Dougherty, W 
2004 
90th Annual Meeting Preprints B 
B 
B-73-5 vol.2 
English 
INSPEC:8133417 
A good image reproduction in ink-jet printing requires the dye of the ink to be retained and chemically fixed on the surface of the coated sheet. To achieve this, usually a cationic additive is added to the paper coating formulations. The most commonly used cationic additive that fixes the dye is poly-DADMAC. Though considered to be a good dye-fixing agent, poly-DADMAC has few inherent characteristics that cause drastic increase in the viscosity and elasticity of the coating color that can lead to poor runnability and brittle coating structure. The main objective of this work is to study the interactions of styrene maelic anhydride imide (SMAI), a multifunctional resin, in precipitated calcium carbonate (PCC) based paper coating and its effects on print image quality, water fastness and surface gloss. The mean grey value, image area and perimeter were used as a direct measure of the print density and print sharpness. The evaluated parameters were superior to those attained with conventional cationic additive. The study demonstrates the potential of developing SMAI as an efficient and commercially viable cationic additive in paper coating for ink-jet printing.