Patent ID: 8748360

Claim:
A method of lubricating a conveyor belt in a dry lubrication process, comprising applying a dry lubricant to the conveyor belt in a way that not more than 10% by volume of the dry lubricant flows off the conveyor belt, wherein the dry lubricant comprises a lubricant concentrate containing at least 0.1 wt.-% of at least one free fatty acid and at least one corrosion inhibitor, wherein the at least one corrosion inhibitor comprises at least one phosphate ester and at least one ethoxylated carboxylic acid, wherein the phosphate ester comprises a compound having the formula (I) or (II), and R is a (C 12 -C 18 )-alkyl fragment; each n is independently 1 to 10; and the ethoxylated carboxylic acid contains a (C 4 -C 18 )-alkyl-fragment and 1 to 6 EO-fragments; and wherein the lubricant concentrate does not contain an amine.