Transparent moulding composition of a polycarbonate and a resin

A transparent moulding compound which comprises

• a. 10 to 95% by weight of a transparent aromatic polycarbonate , the linear chains of which consist [to] of at least 50% of recurrent structural units of the formula [(1)] ##STR3## in which R.sub.1 to R.sub.8, which may be the same or different, represent hydrogen or alkyl with the proviso that at least one of the R.sub.1 to R.sub.8 substitutents is an alkyl group and X represents a single bond, a C.sub.1 to C.sub.12 alkylene or alkylidene group or ##STR4## [if at least one of the R.sub.1 to R.sub.8 substituents is an alkyl group or represents a C.sub.6 to C.sub.12 alkylene or alkylidene group if R.sub.1 to R.sub.8 is hydrogen] and
• b. 5 to 90% by weight of a transparent rubber and/or a transparent resin which contains rubber, the difference in refractive indices between (a) and (b) being not more than 0.010.