Patent ID: 9688810
Date: 2017-06-27
CPC Classifications: C08G,G03G

Claim:
1. A resin composed of a particular polymer, the particular polymer comprising: a repeating unit containing a structure derived from a dehydroabietic acid and represented by the following formula (A2), a structural unit represented by the following formula (I), and an aromatic ring-containing structural unit represented by the following formula (IIa) in the main chain: wherein, in formula (A2), L wherein, in formula (I), G wherein, in formula (IIa), R wherein the copolymerization ratio of the repeating unit containing a structure derived from a dehydroabietic acid is 5% to 40% in a molar ratio; the copolymerization ratio of the structural unit represented by formula (I) is 10 to 80% in a molar ratio; and the copolymerization ratio of the repeating unit represented by formula (IIa) is 5% to 65% in a molar ratio; and wherein the content percentage of the aromatic ring of the aromatic ring-containing structural unit in the particular polymer is from 5% by mass to 30% by mass relative to the total amount of the resin.