A coating composition containing a. polyvinyl chloride b. one or more compounds of formula (I) in which R1a and R1b are C7- to C12-alkyl, c. one or more compounds having plasticizing properties selected from adipates comprising C1- to C6-radicals, glutarates, sebacates, dibenzoates, monobenzoates, compounds of formula (II), compounds of formula (III), phenyl esters of pentadecylsulfonic acid, cresyl esters of pentadecylsulfonic acid, terephthalates, levulinic esters, isosorbitol valerate, trimellitates and 2,2,4-trimethyl-1-3-pentanediol-diisobutyrate, d. one or more compounds of formula (IV)