| 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 least 2. Here, the composition contains 30-100% by weight of a polyamide or a polyamide mixture, consisting of 50-100% by weight of at least one amorphous and/or microcrystalline polyamide 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, and 0-50% by weight of at least one semi-aromatic polyamide. In addition the moulding composition comprises 0.01-20% by weight of one or several inorganic white pigments. Further 0-70% by weight of fibrous fillers (B1) and/or particulate fillers (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 of using a polyamide moulding composition consisting of:
(A) 30-100% by weight of a polyamide or a polyamide mixture, consisting of:
(A1) 50-100% by weight of at least one amorphous and/or microcrystalline polyamide having a glass transition temperature of at least 100° C., measured according to ISO-norm 11357-11-2,wherein amorphous polyamides of the polyamide (A1) have heats of fusion of at most 4 J/g, andmicrocrystalline polyamides of the polyamide (A1) have heats of fusion in the range of 4-25 J/g,in each case determined according to ISO 11 357-11-2 on granulate, differential scanning calorimetry (DSC) with a heating rate of 20° C./min, 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,wherein the mol % within component (al) complement to 100 mol %; and(a2) aromatic and/or aliphatic dicarboxylic acids comprising 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;(A2) 0-50% by weight of at least one semi-aromatic polyamide different from (A1);wherein (A1) and (A2) together form 100% of component (A); (X) 0.01-20% by weight of one or several inorganic white pigments; (B) 0-70% by weight of fibrous fillers (B1) and/or particulate fillers (B2) with the exception of inorganic white pigments; (C) 0-30% by weight of 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, for the production of a stain-resistant article, the staining tendency (ST) of the article, as described in the specification using method A, being at 1 or 2. |
