in mineral spirit had been added was fed into the reactor at 190 u00b0 c under the reaction pressure of 150 mpa the residence time of the reactants in the autoclave was about 2 minutes table 1 lists the polymerization conditions and table 2 the properties of the terpolymers obtained the viscosity was determined according to iso 3219 using a rotational viscometer haake rv 20 with plate and cone measuring system at 140 u00b0 c before the characterization of the polymers volatile components were removed by drying the crude products obtained from the reactions at 150 u00b0 c under reduced pressure 10 mbar for 2 hours the content of vinyl neodecanoate was determined by pyrolysis of the polymer for this purpose the copolymer is thermally cleaved at 450 u00b0 c in a closed system in vacuo the pyrolysis product and residue are dissolved in toluene and after the addition of 2 propanol titrated potentiometrically with a solution of koh in ethanol 0 1 mol of koh per liter of solution to the equivalence point the koh consumption corresponds to the vinyl neodecanoate content table 3 describes the efficiency of the additives obtained according to the preparation examples as flow improvers for mineral oil distillates on the basis of the cfpp test cold filter plugging test according to en 116 in various distillates from scandinavian refineries the additives were used as 50 strength solutions in solvent naphtha the efficiency of a commercial ethylene vinyl acetate copolymer eva copolymer containing 32 by weight 13 3 mol vinyl acetate and having a melt viscosity v 140 of 125 mpas and that of a commercial ethylene vinyl acetate vinyl neodecanoate terpolymer containing 35 by.