Process for degreasing animal hides using ultra-low interfacial tension

摘要

The present invention relates to compositions which are used in the removal of fats from substrates, selected from skins, furs, pelts and other intermediates, in leather and fur production, containing DOLLAR A a) a fat phase; DOLLAR A b) at least one surfactant and DOLLAR A c) an aqueous phase and DOLLAR A d) optionally further auxiliaries and additives, DOLLAR A where the interfacial tension between the fat phase and the aqueous phase is 1 mNm · -1 · to 10 · -9 · MNm · -1 · at a temperature of 15 to 45 ° C, a process for removing fats from the substrates, the use of the compositions for removing fats from the substrates and degreasing agents containing alcohol alkoxylates with a polydispersity D of the individual Alcohol alkoxylates or a mixture of alcohol alkoxylates of D 1.22, and substrates, selected from the group consisting of hides, skins, pelts and other intermediates, in leather and fur production, containing these alcohol alkoxylates.