Rosin pentaerythrite resin is the product of esterification of rosin with pentaerythrite. It's a transparent irregular solid after vacuum treatment. Properties: Soluble in tar, ester, turpentine oil and similar solvents; insoluble in alcoholic solvents; partially soluble in petroleum products; mix well with vegetable oils; light colored; resistant to yellowing; heat resistant; highly adhesive. Applications: For ester glue phenolic resin paints(through polymerization with vegetable oils); widely used in glue industry as low cost enhancer for hot-melt, pressure-sensitive and other types of adhesives.