carboxylic acids with linear or branched C6???C22-fatty alcohols, in particular dioctyl malate, esters of linear and/or branched fatty acids with polyhydric alcohols (such as e.g. propylene glycol, dimerdiol or trimertriol) and/or Guerbet alcohols, triglycerides based on C6???C10-fatty acids, liquid mono-/di-/triglyceride mixtures based on C6???C18-fatty acids, esters of C6???C22-fatty alcohols an