... conten : 0.02 Wt% 4. Color: 17# coumarone resin for rubber& plastics1;Purity : 100%2.Softening Point: 97-1153. Ash ... cementing, antioxidant, waterproof, thermal stability, acid and alkali chemical stability. Deep color resin is commonly used as rubber softener, rubber additive ... , and is mainly used for making types, rubber tubes, covey belt, and ...