disproportionated rosin

noun

Definition of disproportionated rosin

:a substance consisting essentially of dehydrogenated resin acids (as dehydro-abietic acid) together with hydrogenated resin acids (as dihydro-abietic acid) obtained by heating rosin or by treating it with acid and used chiefly in the form of a soap as an emulsifier in making GR-S-type rubber

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