ABS compositions that have an improved surface after storage in a warm and humid environment

摘要

A polymer composition comprising: A) from 0 to 98 parts by weight, based on the sum of A and B, of a thermoplastic polymer or a mixture of a plurality of thermoplastic polymers other than B and B) from 2 to 100 parts by weight, based on the sum of A and B, of: B1) at least one graft polymer produced by the emulsion polymerization process; B2) optionally, at least one graft polymer produced by the bulk, suspension or solution polymerization process; B3) optionally, at least one (co) rubber-free vinyl polymer; and C) from 0 to 30 parts by weight of at least one polymeric additive available in the market, where the sum of the parts by weight of A and B gives a total of 100; characterized in that: (i) the composition comprises at least one inorganic salt composed of a cation, selected from the group of alkali metals, alkaline earth metals and aluminum, and of an anion, selected from the group consisting of chloride, sulfate, nitrate, phosphate, acetate and formate, at a concentration of 100 to 5,000 mg / kg, based on the composition, and (ii) said salt is present in the composition exclusively in the form of amorphous or crystalline inclusions of a size less than 60 μm.