Beschichtete Polycarbonatformkörper

摘要

Coated mouldings of thermoplastic aromatic polycarbonate (TPC) are claimed, in which the coating itself (A) consists of TPC with a thickness of 1-200 microns, contg. 4-20 wt.% of a cpd. of formula (I), R<1> = 18-30C alkyl; R<2> = H or 1-12C alkyl. Also claimed are (i) coated TPC mouldings as above in which (A) is coated with a second coating (B) with a thickness of 0.01-20 microns, consisting of silica, another metalloid or a mixt. thereof; (ii) a process for the prodn. of the first type of coated mouldings by coextrusion of the moulding with the coating (A); (iii) a process for the prodn. of the second type of mouldings by (a) coextrusion of moulding and (A) as above, followed by (b) coating with a colloidal soln. of silica etc. as above in water or organic solvent, and evapn. at 20-140 degrees C.