Abs compositions with improved surface after heat-moisture storage

摘要

Described herein are polymer compositions comprising
at least one inorganic salt comprising a cation selected from the group consisting of alkali metals, alkaline earth metals and aluminum, and an anion selected from the group consisting of chloride, sulfate, nitrate, phosphate, acetate and formate, in a concentration of 100 to 5000 mg/kg, based on the composition, and wherein the 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 more than 60 μm.;Compositions of the present invention are distinguished by an improved surface after heat-moisture storage and are suitable in particular for the production of moldings with a high gloss finish that demand a class A surface, which have optionally been subjected, in whole or in part, to a further surface treatment step involving e.g. lacquering, in-mold decoration, or metallization by vacuum deposition or galvanization.

主权项

1. A polymer composition comprising:
A) from 0 to 98 parts by weight, of at least one thermoplastic polymer, B) from 2 to 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, andB3) optionally at least one rubber-free vinyl (co)polymer, and wherein, said weights of A and B are based on the sum of A and B, C) from 0 to 30 parts by weight of at least one polymer additive, wherein the sum of the parts by weight of A and B being 100, wherein (i) the composition comprises at least one inorganic salt comprising a cation selected from the group consisting of alkali metals, alkaline earth metals and aluminium, and an anion selected from the group consisting of chloride, sulfate, nitrate, phosphate, acetate and formate, in a concentration of 100 to 5000 mg/kg, based on the composition, and (ii) said 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 more than 60 μm.