Anti-curling agents

A h erbranched polyesteramide may be used as an anti-curl agent (59). This compound may be present in the ink in amounts less than conventional anti-curl agents and still effectively control curl without detrimentally affecting intercolor bleed control, water-fastness, or drying. Consequently, the ink composition does not exhibit increases in viscosity and problems associated therewith, that occur in ink composition using conventional anti-curl agents. The s mthesis of h5q)erbranched poisoners has been described in detail (60,61), and is shown in Figure 3.34. 

It has also been proposed to use 1,3-diols, 1,3,5-triols, amino-1,3-diols, or hydroxyamide derivatives as anti-curl agents in the ink in order to suppress curling (56). 

A/,A/-Bis(2-hydroxyethyl)-glycine Figure 3.35 Anti-curling agents (56). 

Hyperbranched poly(ester amides) (anti-curl agent) (59) ... 

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