Modified resin properties for printing ink adhesives

This resin can be formulated into fast-drying, high-gloss, low-resin inks, useful in PhMe gravure printing, where it is reacted with natural resins or resin acids with aldehydes, phenols and carboxylic acids or anhydrides and/or polyols. , and then developed with the reaction of divalent metal base components. Heat 1kg Chinese rosin containing 100g paraformaldehyde at 2°C for 2 h, add 60g nonylphenol, heat at 250°C with distilled water, add 68g calcium hydroxide, distill xylene for more than 1h on 68g xylene, add 13g AcOH After more than 30 min in 5 g of xylene, the volatiles were again vacuum stripped to give a solid resin with a softening point of 140°C. This adhesive has a high gloss in printing inks.

Source: Rosin Forum