| abstract |
Process for the production of thermoplastic molding materials, in which the thermoplastic molding materials contain a) from 3 to 79% by weight of one or more (methyl) styrene-acrylonitrile copolymers, which do not have any unit derived from maleic acid anhydride , as component A, b) from 15 to 91% by weight of one or more polyamides as component B, c) from 5 to 50% by weight of one or more rubbers as component C, d) from 1 to 25% by weight of one or more compatibilizers as component D, e) from 0 to 2% by weight of one or more compounds of low molecular weight, which contain a carboxylic acid anhydride group, as component E, f) from 0 to 50% by weight of one or more fillers in the form of fiber or in the form of a particle as component F and g) from 0 to 40% by weight of additional additives as component G, the% by weight in each case referring to the total weight of components A to G and resulting in 100% together in pe so, by mixing in the molten state of the components A to G, characterized in that in an endless screw extruder, which along the direction of transport comprises in this order at least one dosing zone, a plasticizing zone , a homogenization zone and a discharge zone, after the addition of components A, B and C to the dosing zone in a first process step in the absence of component D, a molten mass is generated, and in a second process stage after the addition of component D to the homogenization zone, the incorporation is carried out by mixing component D in this melt. |