For the purposes of the present invention, mixtures are also present if the esters mentioned are mixed in the specified ratio, simultaneously or in succession, with another substance, such as plastics (e.g. PVC). [0071] One preferred embodiment of the present invention also provides a process for preparing a mixture of isomeric decyl benzoates, comprising [0072] from 50 to 99% of 2-propylheptyl be