... Color C9 Hydrocarbon ResinAppearance: Pale yellow, granuleSoftening point (οC):100-140Gardner color index Ga: 4-7Acid No. ... good adjustment of viscosity and thermal stability. Generally, 9 petroleum resin is not used alone, but as promoters, regulators ... , modifiers used with other resin.Other application: Others Petroleum resin having certain characteristic of unsaturated, can be ...