Disproportionated rosin (DPR) is a compound of dehydroabietic acid and dihydroabietic acid, produced through the catalytic reaction of gum rosin at a controlled temperature. In the synthetic rubber industry, DPR is used as an emulsifier in the production of various rubbers, including styrene-butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber, and acrylonitrile-butadiene-styrene rubber. When DPR is used as an emulsifier, it enhances the cohesion of rubber products and increases heat resistance by 25%. Additionally, rubber made with DPR has improved resistance to abrasion and tearing compared to ordinary styrene-butadiene rubber. Cohesion is further enhanced when blended with natural rubber.
DPR is also an important component in potassium soaps, which are used as emulsifiers to improve the quality of synthetic rubbers. It is a key raw material for producing adhesives, water-based pressure-sensitive adhesives (PSAs), pigments, and even chewing gum.