Patent ID: 7749409

Claim:
A fatliquoring agent for the production and/or treatment of flame-retardant leathers, skins and hides, said fatliquoring agent comprising: A) a modified natural oil present in an amount of 20 to 50% by weight; B) a neutral oil present in an amount of 5 to 20% by weight; C) a coemulsifier present in an amount of 5 to 20% by weight; and D) at least one neutral halogen-free organic phosphorus compound present in an amount of 5 to 20% by weight; wherein all percentages by weight wherein the neutral halogen-free organic phosphorus compound is at least one phosphorus compound selected from the group consisting of 6H-dibenz[c,e][1,2]oxaphosphorine 6-oxide and its derivatives, dimethyl methanephosphonate, dimethyl propanephosphonate, diethyl ethanephosphonate, triethyl phosphate, tri-n-butyl phosphate, triisobutyl phosphate, trioctyl phosphate, diphenyl octyl phosphate, triphenyl phosphate, diphenyl cresyl phosphate, tricresyl phosphate, isopropylated aryl phosphates, tert-butylated aryl phosphates, resorcinol bis(diphenylphosphate) and bisphenol A-bis(diphenylphosphate) and are based on a total weight of the fatliquoring agent.