Method for producing a preferably pressure-sensitive adhesive using a first planetary roller extruder and a downstream second venting planetary roller extruder, where a) the first planetary roller extruder consists of a filling and dispersing zone operated atmospherically and comprising at least one roller cylinder, b) the polymers which form the thermally vulcanizable, meltable, preferably pressure-sensitive adhesive are supplied to the planetary roller extruder in a plastified state, c) the plastified polymers are fed into the at least one roller cylinder of the filling and dispersing zone, and specifically within the first third of the roller cylinder, d) solids such as thermal crosslinkers are added to the plastified polymers downstream of the addition of the plastified polymers in the filling and dispersing zone, in particular by means of a lateral screw feeder, via an opening of the at least one roller cylinder, e) the solids are dispersed in the plastified polymers in the filling and dispersing zone, f) the solids comprise at least thermal crosslinkers which are able to crosslink the plastified polymers for the purpose of increasing the molar mass of the polymers, g) the initial temperatures of the central spindle and of the at least one roller cylinder within the filling and dispersing zone are established such that there is no gelling of the plastified polymers blended with the thermal crosslinkers, h) the mixture of plastified polymers and solids, preferably thermal crosslinkers, is supplied, more preferably in-line, to a second venting planetary roller extruder, i) the second venting planetary roller extruder consists of a venting zone composed of at least one roller cylinder, j) the mixture of plastified polymers and solids, preferably thermal crosslinkers, is vented in the venting planetary roller extruder, k) the vented mixture of plastified polymers and solids, preferably thermal crosslinkers, is supplied, more preferably in-line, to a coating assembly. a) the first planetary roller extruder consists of a filling and dispersing zone operated atmospherically and comprising at least one roller cylinder, b) the polymers which form the thermally vulcanizable, meltable, preferably pressure-sensitive adhesive are supplied to the planetary roller extruder in a plastified state, c) the plastified polymers are fed into the at least one roller cylinder of the filling and dispersing zone, and specifically within the first third of the roller cylinder, d) solids such as thermal crosslinkers are added to the plastified polymers downstream of the addition of the plastified polymers in the filling and dispersing zone, in particular by means of a lateral screw feeder, via an opening of the at least one roller cylinder, e) the solids are dispersed in the plastified polymers in the filling and dispersing zone, f) the solids comprise at least thermal crosslinkers which are able to crosslink the plastified polymers for the purpose of increasing the molar mass of the polymers, g) the initial temperatures of the central spindle and of the at least one roller cylinder within the filling and dispersing zone are established such that there is no gelling of the plastified polymers blended with the thermal crosslinkers, h) the mixture of plastified polymers and solids, preferably thermal crosslinkers, is supplied, more preferably in-line, to a second venting planetary roller extruder, i) the second venting planetary roller extruder consists of a venting zone composed of at least one roller cylinder, j) the mixture of plastified polymers and solids, preferably thermal crosslinkers, is vented in the venting planetary roller extruder, k) the vented mixture of plastified polymers and solids, preferably thermal crosslinkers, is supplied, more preferably in-line, to a coating assembly.