Patent ID: 6761832
Filing Date: 2004-07-13
Classification: C07F,C08K

Abstract:
A process for the production of dithiophosphoric acid polysulfide mixtures of the formula in whichR1 to R4 are identical or different and denote a linear or branched C1-C18 alkyl residue, C1-C18 alkenyl residue, C5-C28 cycloalkyl residue, C5-C28 cycloalkenyl residue as well as a C6-C28 aryl residue or C7-C28 aralkyl residue and n denotes a number from 2.5 to 3.5, comprising the step of reacting dithiophosphoric acid disulfides of the formula in whichR1 to R4 have the above-stated meaning, with 0.5 to 1.5 mol of sulfur, optionally in the presence of a solvent, at temperatures of 100 to 140Â° C.