Influence of a Biobased Reagent on Properties of Industrial Resin for Printing Ink Application vis-à-vis Comparison with Standard Commercial Resin

In our present work, we have attempted to develop a low volatile organic containing, ecofriendly resin from a natural resource maintaining the quality and desired properties for printing ink applications. Guar Gum, a natural polysaccharide was used in place of pentaerythritol in the recipe. It was used during trans-esterification reaction to synthesize rosin modified phenolic resin for printing ink. A conventional rosin modified phenolic resin, using pentaerytritol, was also synthesized for comparison. Guar Gum having multiple hydroxyl groups was able to produce resin with higher molecular weight and high solvent tolerance value which makes the ecofriendly resin as potential binder for printing ink application with excellent print quality. The modified resin was characterized using various analytical techniques to find the influence of the polysaccharide on the final properties. A detailed kinetic study was also carried out in order to justify the reaction mechanism.