The present invention related to thermoplastic compositions comprising (A) thermoplastic polycarbonate; (B) a graft polymerisation product of (B-1) a mixture of (B-1.1) styrene, .alpha.-methylstyrene, halogen or methyl ring-substituted styrene, C.sub.1 -C.sub.8 alkyl methacrylates, or C.sub.1 -C.sub.8 alkyl acrylate and (B-1.2) acrylonitrile, methacrylonitrile, C.sub.1 -C.sub.8 alkyl methacrylates, C.sub.1 -C.sub.8 alkyl acrylate, maleic anhydride, C.sub.1 -C.sub.4 alkyl or phenyl N-substituted maleimides grafted on (B-2) a polymer with a glass transition temperature of below -10.degree. C. (C) vinyl copolymer prepared from (C-1) styrene, .alpha.-methylstyrene, ring-substituted styrenes, C.sub.1 -C.sub.8 alkyl methacrylates, or C.sub.1 -C.sub.8 alkyl acrylate and (C-2) acrylonitrile, methacrylonitrile, C.sub.1 -C.sub.8 alkyl methacrylates, C.sub.1 -C.sub.8 alkyl acrylates, maleic anhydride, or phenyl N-substituted maleimides, (D) a mixture of (D-1) phosphagen compound having formula (I--I) ##STR1## and/or phosphagen compound having formula (I-2) ##STR2## (D-2) phosphate ester and (E) fluorinated polyolefin

De onderhavige uitvinding had op thermoplastische samenstellingen betrekking bestaand (A) uit thermoplastisch polycarbonaat; (B) een product van de entpolymerisatie van (B-1) een mengsel van het styreen (van B-1,1), alpha.-methylstyrene, halogeen of methyl ring-gesubstitueerde styreen, C.sub.1 - alkyl C.sub.8 methacrylates, of C.sub.1 - alkyl acrylate C.sub.8 en (B-1,2) acrylonitrile, methacrylonitrile, C.sub.1 - alkyl C.sub.8 methacrylates, C.sub.1 - C.sub.8 alkyl acrylate, maleic anhydride, C.sub.1 - alkyl of phenyl N-substituted maleimides C.sub.4 die op (B-2) wordt geënt een polymeer met een temperatuur van de glasovergang van onderstaand -10.degree.c. (C) vinylcopolymeer dat van (c-1) wordt voorbereid styreen, alpha.-methylstyrene, ring-gesubstitueerd styreen, C.sub.1 - alkyl C.sub.8 methacrylates, of C.sub.1 - alkyl acrylate C.sub.8 en (c-2) acrylonitrile, methacrylonitrile, C.sub.1 - alkyl C.sub.8 methacrylates, C.sub.1 - alkyl acrylates C.sub.8, maleic anhydride, of phenyl N-substituted maleimides, (D) een mengsel van (D-1) phosphagen samenstelling formule (II) hebben ## STR1 ## en/of phosphagen samenstelling die de ester van het formule (I-2) hebben ## STR2 ## (D-2) fosfaat en (E) fluorinated polyolefin