Internal antistatic agents for polycarbonates and for polycarbonate films

Claim 1

A polycarbonate composition characterized by its antistatic properties consisting of a polycarbonate resin and a member selected from a group consisting of alkali metal salts or alkaline earth metal salts of (i) the monomeric aromatic sulfonic acid of the general formula (I) ##STR17## in which D denotes C 4 -C 20 -alkyl or alkenyl, and M denotes Li and m=n=1, or M denotes Ca and m=1 and n=2, (ii) the polymeric aromatic (poly)-sulfonic acid of the general formula (II) ##STR18## wherein R 1 and R 2 independently denote a C 2 -C 6 -alkylene radical, B denotes ##STR19## M denotes an alkali metal and m=n=1 or M denotes an alkaline earth metal in which case M=1 and n=2; a, b and c denote integers equal to or greater than 1 with the proviso that b=3 to 30 and a+b+c=100 and x denotes a number such that the polymeric salt has an average molecular weight (weight-average molecular weight) of 800 to 10 6 ; (iii) the monomeric aromatic phosphonic acid of the general formula (III) (R.sub.1).sub.t --A--(PO.sub.3)M.sub.p ].sub.z (III) wherein A denotes an aryl radical containing 1-4 aromatic rings, R 1 denotes C 4 -C 20 -alkyl, alkenyl, C 6 -C 20 -cycloalkyl or cycloalkenyl, t is an integer of from 1-4, M denotes an alkali metal and p=2, or M denotes an alkaline earth metal, in which case, p=1 and z denotes 1 or 2; (iv) the monomeric partial aromatic phosphoric acid ester of the general formula (IV) ##STR20## wherein A, R 1 , t, M, p and z are as defined for formula (III); (V) the monomeric partial aromatic phosphoric acid ester of the general formula (V) ##STR21## wherein A, R 1 and t are as defined for formula (III) and M denotes an alkali metal and d=e=1 or M denotes an alkaline earth metal, in which case, d=1 and e=2.