Binders for printing inks

摘要

The binder is obtained by reacting natural resins, resin acids or hydrocarbon resins with phenol-aldehyde condensation products at 50-300 degrees C in a solvent so that no crosslinking occurs. A binder for printing ink is obtained by reacting compounds (A) containing units of natural resins and/or natural resin acids and/or hydrocarbon resins with 5C, 9C or terpene units with compounds (B) containing units of phenol-aldehyde condensation products in a solvent (C) at 50-300 degrees C and in proportions by weight of 1-98% (A), 0.1-50% (B) and 1-98% (C), to give uncrosslinked resin solutions. An Independent claim is also included for the above process carried out under the conditions described so that no crosslinking occurs.