... ~65~6Acid Value ,mgKOH/g, max202020Softening Point (R&B), , min100115115Specific gravity, 25/251.060~1.0901.060~1.0901.060~1 ... .0902. Properties and uses:Pentaerythritol ester of modified gum rosin are made from gum rosin ,light-colored ... through esterification with pentaerythritol and resin additive; have the character of light color,high softening point,superior heat stability and weather ...