Devolatilisation apparatus comprising at least one extruder which has at least: • a barrel and n barrel holes B n having the associated hole diameters D n where n is an integer from 2 to 16, particularly preferably from 2 to 12, very particularly preferably from 2 to 8 and even more preferably 2, and the barrel holes pass through opposite one another and are preferably arranged parallel to one another, • n screws W n which preferably can be driven so as to rotate in the same direction and are in each case arranged concentrically in one of the barrel holes B n, in each case have an axis of rotation A n and in each case are equipped with at least one treatment element whose cross-sectional profile in the circumferential direction has - m relative maxima R m max n in respect of the radial dimension of the cross-sectional profile of the treatment element to the axis of rotation A n of the screw W n, where m is an integer from 1 to 16, preferably from 1 to 8, particularly preferably 1, 2, 3 or 4, very particularly preferably 1, 2 or 3 and even more preferably 2 or 3, where, furthermore, at least one relative maximum R m max n is an absolute maximum of the radial dimension R max n in respect of the radial dimension of the cross-sectional profile of the treatment element to the axis of rotation A n of the screw W n, where R max n fulfils: R max n < = D n / 2 • at least one feed zone, • one or more devolatilisation zones comprising in each case at least one devolatilisation opening which is suitable for discharge of volatile constituents from an elastomer-containing medium from the extruder, • at least one discharge zone, where the extruder has screw elements SE as treatment elements, which are configured so that at least the following condition is met: S1) the free spacing A SE between the profiles of the screw elements of two screws which can be driven so as to rotate and are each arranged concentrically in adjacent barrel holes B n and B n+1 which pass through opposite one another, is, in cross-sectional profile with rotation of the screws by 360° in the same direction, i) from 0.001 to 0.2 A D, where A D is the spacing of the axes of rotation of the adjacent two screws which can be driven so as to rotate ii) and has an absolute minimum A minSE and an absolute maximum A maxSE where A maxSE ≥ 1.5 A minSE, preferably ≥ 5.0 A minSE and particularly preferably ≥ 10.0 A minSE. • a barrel and n barrel holes B n having the associated hole diameters D n where n is an integer from 2 to 16, particularly preferably from 2 to 12, very particularly preferably from 2 to 8 and even more preferably 2, and the barrel holes pass through opposite one another and are preferably arranged parallel to one another, • n screws W n which preferably can be driven so as to rotate in the same direction and are in each case arranged concentrically in one of the barrel holes B n, in each case have an axis of rotation A n and in each case are equipped with at least one treatment element whose cross-sectional profile in the circumferential direction has - m relative maxima R m max n in respect of the radial dimension of the cross-sectional profile of the treatment element to the axis of rotation A n of the screw W n, where m is an integer from 1 to 16, preferably from 1 to 8, particularly preferably 1, 2, 3 or 4, very particularly preferably 1, 2 or 3 and even more preferably 2 or 3, where, furthermore, at least one relative maximum R m max n is an absolute maximum of the radial dimension R max n in respect of the radial dimension of the cross-sectional profile of the treatment element to the axis of rotation A n of the screw W n, where R max n fulfils: R max n < = D n / 2 - m relative maxima R m max n in respect of the radial dimension of the cross-sectional profile of the treatment element to the axis of rotation A n of the screw W n, where m is an integer from 1 to 16, preferably from 1 to 8, particularly preferably 1, 2, 3 or 4, very particularly preferably 1, 2 or 3 and even more preferably 2 or 3, where, furthermore, at least one relative maximum R m max n is an absolute maximum of the radial dimension R max n in respect of the radial dimension of the cross-sectional profile of the treatment element to the axis of rotation A n of the screw W n, where R max n fulfils: R max n < = D n / 2 • at least one feed zone, • one or more devolatilisation zones comprising in each case at least one devolatilisation opening which is suitable for discharge of volatile constituents from an elastomer-containing medium from the extruder, • at least one discharge zone, where the extruder has screw elements SE as treatment elements, which are configured so that at least the following condition is met: S1) the free spacing A SE between the profiles of the screw elements of two screws which can be driven so as to rotate and are each arranged concentrically in adjacent barrel holes B n and B n+1 which pass through opposite one another, is, in cross-sectional profile with rotation of the screws by 360° in the same direction, i) from 0.001 to 0.2 A D, where A D is the spacing of the axes of rotation of the adjacent two screws which can be driven so as to rotate ii) and has an absolute minimum A minSE and an absolute maximum A maxSE where A maxSE ≥ 1.5 A minSE, preferably ≥ 5.0 A minSE and particularly preferably ≥ 10.0 A minSE. i) from 0.001 to 0.2 A D, where A D is the spacing of the axes of rotation of the adjacent two screws which can be driven so as to rotate ii) and has an absolute minimum A minSE and an absolute maximum A maxSE where A maxSE ≥ 1.5 A minSE, preferably ≥ 5.0 A minSE and particularly preferably ≥ 10.0 A minSE.