| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin for offset printing ink, which has the same or superior abilities in comparison with those that a conventional rosin-modified phenol resin has, without using an alkyl phenol and formaldehyde, and a resin for dispersing a pigment, in particular. SOLUTION: The resin for the offset printing ink, having 120-220°C softening point and 5,000-50,000 weight average molecular weight, is obtained by reacting (a) a polymerized rosin, (b) at least one selected from a vegetable oil, a polymerized vegetable oil, a vegetable oil fatty acid and other higher fatty acids, (c) an unsaturated dibasic acid and (d) a polyhydric alcohol. COPYRIGHT: (C)2005,JPO&NCIPI
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