MODIFIED HYDROCARBON RESIN

The main purpose of the present invention is to provide a modified hydrocarbon resin that has reduced odor and has excellent color tone and heat resistance hue stability. The present invention solves the above problem by providing a modified hydrocarbon resin characterized by being formed by introducing a carboxyl group or an acid anhydride group derived from an unsaturated carboxylic acid or an unsaturated dicarboxylic acid anhydride into a resin formed by hydrogenating a hydrocarbon resin comprising: a 1,3-pentadiene monomeric unit of 20 mass% to 70 mass%; a C4-6alicyclic monoolefin monomeric unit of 10 mass% to 40 mass%; a C4-8acyclic monoolefin monomeric unit of 5 mass% to 30 mass%; an alicyclic diolefin monomeric unit of 0 mass% to 1 mass%; and an aromatic monoolefin monomeric unit of 0 mass% to 40 mass%; wherein a degree of hydrogenation of the olefins is within a range of 0.1% to 80%.