Patent ID: 6444022
Filing Date: 2002-09-03
Classification: C09D

Abstract:
A water based offset lithographic printing ink comprising:(a) water; (b) a modified rosin polymer, in an amount of from about 10 wt. % to about 70 wt. %, based on a total weight of the ink, the modified rosin polymer including at least one compound selected from the group (i)-(iv) consisting of: (i) a resin soluble in water regardless of the pH of the water, in an amount of from 0 to about 5 wt. %, based on the total weight of the ink, (ii) a rosin resin salt soluble in water at a pH ranging from about 7.5 to about 10, in an amount of from about 10 wt. % to about 70 wt. %, based on the total weight of the ink, (iii) an aqueous emulsion forming resin, in an amount of from 0 wt. % to about 20 wt. %, based on the total weight of the ink, and (iv) combinations of at least two of (ii) and one or more of (i) and (iii); (c) a polyol modified linseed oil having increased water solubility; and (d) pigment.