ABS COMPOUNDS WITH IMPROVED SURFACE AFTER HOT-WET STORAGE

Polymer composition comprises: (a) 0-98 parts by weight of at least one thermoplastic polymer; (b) 2-100 parts by weight of (b1) at least one graft polymer prepared by an emulsion polymerization method, (b2) optionally at least one graft polymer prepared by a bulk, suspension or solution polymerization method, and (b3) optionally at least one rubber-free vinyl (co)polymer, where the weights of (a) and (b) are based on the sum of (a) and (b); and (c) 0-30 parts by weight of at least one commercially available polymer additive, where the sum of the parts by weight of (a) and (b) is 100. Polymer composition comprises: (a) 0-98 parts by weight of at least one thermoplastic polymer; (b) 2-100 parts by weight of (b1) at least one graft polymer prepared by an emulsion polymerization method, (b2) optionally at least one graft polymer prepared by a bulk, suspension or solution polymerization method, and (b3) optionally at least one rubber-free vinyl (co)polymer, where the weights of (a) and (b) are based on the sum of (a) and (b); and (c) 0-30 parts by weight of at least one commercially available polymer additive, where the sum of the parts by weight of (a) and (b) is 100. The composition comprises at least one inorganic salt comprising a cation containing of alkali metals, alkaline earth metals or aluminum, and an anion containing of chloride, sulfate, nitrate, phosphate, acetate or formate, in a concentration of 100-5000 mg/kg, based on the composition, and the inorganic salt is present in the composition exclusively in dissolved form or in the form of amorphous and/or crystalline inclusions having a size of not > 60 mu m. Independent claims are also included for: (1) a molding produced from the polymer composition, comprising a class A surface and a full or partial high gloss finish, where a gloss level is at least 95, determined by reflection according to DIN 67530 at a measurement angle of 60[deg] , which can optionally be subjected, in whole or in part, to a further surface treatment step optionally comprising lacquering, in-mould decoration, and/or metallization by vacuum deposition and/or galvanization; and (2) a process for preparing a polymer composition, comprising either: subjecting the component B1 and/or a pre-compound of component (b1) with all or part of at least one of components (b2) and/or (b3), to melt filtration using a sieve with a mesh size of not > 60 mu m; or subjecting components of the composition to melt filtration using a sieve with a