STAIN-RESISTANT ARTICLE AND USE THEREOF

摘要

What is described is the use of a polyamide moulding composition for the production of a stain-resistant article, the staining tendency (ST) of the article being at most 15. Here, the composition contains 30-100% by weight of a polyamide mixture, consisting of more than 50 and up to 98% by weight of at least one semi-aromatic polyamide comprising 2 to up to 50% by weight of amorphous and/or microcrystalline polyamides having a glass transition temperature of at least 100° C., based on: 20-100 mol % of at least one cycloaliphatic diamine; and 0-80 mol % of at least one other aliphatic and/or aromatic diamine; and also aromatic and/or aliphatic dicarboxylic acids comprising at least 6 carbon atoms. In addition, 0-70% by weight of fibrous additives (B1) and/or particulate additives (B2), 0-30% by weight of impact toughness modifier and/or polymers different from (A), 0-25% by weight of a flame retardant, and 0-3% by weight of additives may also be contained.

主权项

1. A method for the production of a stain-resistant article, the staining tendency (ST) of the article being at most 15 and the staining tendency (ST) being reduced by at least 20% compared to an article based exclusively on semi-aromatic polyamides (A1), using a polyamide moulding composition containing:
(A) 30-100% by weight of a polyamide mixture, consisting of:
(A1) 50-98% by weight of at least one semi-aromatic polyamide;(A2) 2-50% by weight of at least one amorphous and/or microcrystalline polyamide, different from (A1), having a glass transition temperature of at least 100° C., based on:
(a1) 20-100 mol % of at least one cycloaliphatic diamine; and 0-80 mol % of at least one other aliphatic and/or aromatic diamine; and(a2) aromatic and/or aliphatic dicarboxylic acids with at least 6 carbon atoms,with the proviso that up to 45 mol % of the totality of monomers of components (a1) and (a2) can be replaced by lactams comprising 6 to 12 carbon atoms or amino carboxylic acids comprising 6 to 12 carbon atoms;wherein the proportions (A1) and (A2) together form 100% by weight; (B) 0-70% by weight of fibrous additives (B1) and/or particulate additives (B2) (C) 0-30% by weight of an impact modifier and/or polymers different from (A) (D) 0-25% by weight of a flame retardant (E) 0-3% by weight of additives; wherein the sum of the constituents (A)-(E) makes up 100% by weight.