|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 0 인용 특허 : 83|
Alkylphosphorofluoridothioates containing alkyl groups of greater than four carbons which exhibit significantly lower wear volume compared to ZDDP, methods of making same with high yields, and methods of using same as lubricant additives.
1. A method for synthesizing an alkylphosphorofluoridothioate having desired alkyl groups, comprising the steps: i) reacting phosphorus pentasulfide with alcohol having the desired alkyl groups to form an O,O-dialkyl dithiophosphoric acid; andii) reacting the O,O-dialkyl dithiophosphoric acid with thionyl fluoride (SOF2)so that one of the thio groups is replaced by a fluoride to yield the alkylphosphorofluoridothioate. 2. A pure alkylphosphorofluoridothioate having the structure wherein R1 and R2 are the same or different and are alkyl groups with betwe...