| 摘要 |
<p>PURPOSE:To provide the title compsn. having excellent printability, flow characteristics and resistance to scumming, containing a specified org. solvent and a rosin-modified phenolic resin or a petroleum resin as a binder resin component. CONSTITUTION:A resol type phenolic resin obtd. by reacting a phenol with formaldehyde in the presence of an alkaline catalyst is reacted with rosin (e.g., wood rosin), a polyhydric alcohol (e.g., glycerol), a mono- or dibasic acid (e.g., adipic acid) and optionally, vegetable oil (e.g., linseed oil) to obtain a rosin- modified phenolic resin (B) having a weight-average MW of not lower than 50,000 (in terms of PS). 1-20wt% org. solvent (A) having a b.p. of 180-350 deg.C and a solubility parameter of 8.5-10.0 (e.g., Cellosolve acetate) is blended with a binder resin component composed of the component B or a petroleum resin (C) obtd. by using, as a starting material, a fraction having a b.p. of 20-300 deg.C obtd. by cracking or reforming petroleum and optionally, other resin component, a vehicle component, other additives for ink, etc.</p> |
