FIELD: chemistry.
SUBSTANCE: invention relates to compositions based on ethylene-vinyl acetate polymers and their use as anti-gelling additives to paraffinic crude oils. Described herein is a polymer composition for lowering the pour point of paraffinic crude oils, containing a synergistic mixture of at least two ethylene vinyl acetate (EVA) copolymers. EVA copolymers have an average molecular weight Mw from 25,000 to 100,000 daltons (measured by gel permeation chromatography), he content of vinyl acetate (BA) monomer is from 15 to 50 % wt. provided that the monomer content of the monomer in the corresponding copolymers differs from each other by more than 5 % by weight.
EFFECT: invention provides an increase in the efficiency of lowering the pour point of paraffinic crude oils.
16 cl, 2 tbl, 16 ex
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