Patent ID: 6638898
Filing Date: 2003-10-28
Classification: C10M,C10N

Abstract:
A process for the preparation of a multi-functional additive, amino di(alkylcyclohexyl) phosphorodithioate, for use as an additive in a lubricant composition comprising the steps of:(a) hydrogenating distilled technical cashew nut shell liquid (CNSL) with a catalyst to fully hydrogenate the olefinic chain and aromatic ring of the precursor and obtain fully saturated CNSL (b) reacting at a temperature of from 20 to 140Â° C. said fully saturated cashew nut shell liquid with phosphorus pentasulfide to obtain corresponding unpolymerized cashew nut shell liquid phosphorodithioic acid; and (c) condensing the unpolymerized cashew nut shell liquid phosphorodithioic acid with at least one amine to obtain the amino di(alkylcyclohexyl) phosphorodithioate.