| abstract |
The invention relates to composite films of a polycarbonate film and a film of another plastic, wherein the polycarbonate film consists of a high molecular weight, thermoplastic, aromatic polycarbonate having Mw (weight average molecular weights) of at least 10,000, the bifunctional carbonate structural units of the formula (I a), wherein R1 and R 2 independently of one another are hydrogen, halogen, C 1 -C 8 -alkyl, C 5 -C 6 -cycloalkyl, C 6 -C 10 -aryl and C 7 -C 12 -aralkyl, m is an integer from 4 to 7, R 3 and R 4 are individually selectable for each X, independent of one another each other is hydrogen, C1-C6-alkyl and X is carbon, with the formula that at least one atom X R3 and R4 are simultaneously alkyl, in amounts of 100 mol% to 2 *, each based on the total amount of 100 mol% of contains difunctional carbonate structural units in the polycarbonate. Formula (I a) {composite film; polycarbonate; Plastic; Carbonate structure, thermoplastic, aromatic} |