润滑科技信息平台

Dimercaptothiadiazole-mercaptan coupled compounds as multifunctional additives for lubricants and fuels

专利摘要

Combinations of dimercaptothiadiazole-mercaptan coupled derivatives with amines have been found to be effective load-carrying additives for lubricants and fuels. ......

基本信息

专利类型:
发明专利
申请/专利号:
US08/328971
申请日期:
1994-10-24
专利申请人:
美孚石油公司
分类号:
["C07D285/00","C07D285/125","C10M135/00","C10L1/14","C10L10/04","C10L10/00","C10L1/10","C10L1/24","C10M135/36","C10L1/22","C07D285/12"]
发明/设计人:
FARNG, LIEHPAO O. ， GOYAL, ARJUN K.
权利要求: What is claimed is:1. An improved lubricant composition comprising a major proportion of an oil of lubricating viscosity or a grease prepared therefrom, or a liquid hydrocarbyl or hydrocarboxy fuel and a minor proportion of a non-phosphorus, multifunctional antioxidant, load-carrying antiwear/extreme pressure and corrosion inhibiting additive product of reaction comprising a dimercaptothiadiazole coupled dithio compound reacted with a hydrocarbyl amine where each dithio functionality of said dimercaptothiadiazole has attached thereto no more than one hydrogen and at least one C.sub.1 -C.sub.30 hydrocarbyl group that are the same or different which results in the additive product having both a thiadiazole-alkyldithio moiety and an amine or ammonium salt moiety and wherein the reaction is carried out at temperatures varying from ambient to about 250.degree. C. under pressures varying from ambient to about 100 psi or is autogenous with the reaction time varying from about one hour to about 48 hours sufficient to obtain the desired additive product of reaction and where the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.2. The composition of claim 1 wherein said additive product of reaction is generally prepared by reacting a thiadiazole-derived dithio compound of the structural formula ##STR3## where R and R.sub.1 are the same or different and are hydrogen or C.sub.1 to about C.sub.30 hydrocarbyl selected from alkyl, aryl, alkaryl, aralkyl and may optionally contain additional O, S, N or mixtures thereof with a hydrocarbyl amine and wherein the reaction is carried out at temperatures varying from ambient to about 250.degree. C. under pressures varying from ambient to about 100 psi or is autogenous with reaction times varying from about one hour to about 48 hours time sufficient to obtain the desired additive product of reaction and where the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.3. The composition of claim 1 wherein said dithio compound is 2,5-bis(t-nonyl-dithio)thiadiazole and said amine is isodecyloxypropylamine.4. The composition of claim 1 wherein said oil of lubricating viscosity is selected from the group consisting of (1) mineral oils, (2) synthetic oils, (3) or mixtures of mineral and synthetic oils or is (4) a grease prepared from any one of (1), (2) or (3).5. The composition of claim 4 wherein the lubricant contains from about 0.001 to about 10 wt % based on the total weight of the composition of the additive product of reaction.6. The composition of claim 4 wherein the lubricant is a mineral oil.7. The composition of claim 4 wherein the lubricant is a synthetic oil.8. The composition of claim 1 wherein the fuel is selected from the group consisting of liquid hydrocarbyl or hydrocarboxy or alcoholic or mixtures of hydrocarbyl and alcoholic fuels.9. The composition of claim 8 wherein the fuel contains from about 50 to about 500 lbs. of said additive per 1000 bbs of fuel.10. The composition of claim 8 wherein the fuel is a distillate fuel.11. A method of preparing an improved lubricant or fuel composition comprising adding to said lubricant or fuel a minor multifunctional antioxidant, load-carrying, corrosion-inhibiting amount of from about 0.001 to about 10 wt % based on the total weight of the composition or from 50 to about 500 lbs of the additive product of reaction as claimed in claim 1.12. A method of protecting moving metal parts comprising:a) contacting said metal parts with a minor multifunctional antioxidant amount of from about 0.001 to about 10 wt % based on the total weight of the composition or from 50 to about 500 lbs of the additive product of reaction as claimed in claim 1; andb) imparting improved load-carrying and corrosion-inhibiting qualities to the moving metal parts contacted with said additive product of reaction of step a).13. A process of preparing a non-phosphorus multifunctional antioxidant, load-carrying and corrosion inhibiting additive product prepared therefrom, or a liquid hydrocarbyl and a minor proportion of a non-phosphorus, multifunctional antioxidant, load-carrying, antiwear/extreme pressure and corrosion inhibiting additive product of reaction comprising a dimercaptothiadiazole coupled dithio compound reacted with a hydrocarbyl amine where each dithio functionality of said dimercaptothiadiazole has attached thereto no more than one hydrogen and at least one C.sub.1 -C.sub.30 hydrocarbyl group that are the same or different which results in the additive product having both a thiadiazole-alkyldithio moiety and an amine or ammonium salt moiety and wherein the reaction is carried out at temperatures varying from ambient to about 250.degree. C. under pressures varying from ambient to about 100 psi or is autogenous with the reaction time varying from about one hour to about 48 hours sufficient to obtain the desired additive product of reaction and where the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.14. The process of claim 13 wherein wherein said additive product of reaction is generally prepared by reacting a thiadiazole-derived dithio compound of the structural formula ##STR4## where R and R.sub.1 are the same or different and are hydrogen or C.sub.1 to about C.sub.30 hydrocarbyl selected from alkyl, aryl, alkaryl, aralkyl and may optionally contain additional O, S, N or mixtures thereof with a hydrocarbyl amine and wherein the reaction is carried out at temperatures varying from ambient to about 250.degree. C. under pressures varying from ambient to about 10 psi or is autogenous and the reaction time varying from about one hour to about 48 hours sufficient to obtain the desired additive product of reaction and where the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.15. The process of claim 13 wherein said dithio compound is 2,5-bis(t-nonyl-dithio)thiadiazole and said amine is isodecyloxypropylamine.16. A lubricant or fuel additive product of reaction consisting of a dimercaptothiadiazole coupled dithio compound reacted with a hydrocarbyl amine where each dithio functionality has attached thereto no more than one hydrogen and at least one C.sub.1 -C.sub.30 hydrocarbyl group that are the same or different which results in the additive product having both a thiadiazole-alkyldithio moiety and an amine or ammonium salt moiety and wherein the additive product imparts non-phosphorous multifunctional, load-carrying and corrosion inhibiting qualities to an oil of lubricating viscosity or a grease prepared therefrom.17. The additive of claim 16 prepared by reacting a thiadiazole-derived dithio compound of the structural formula ##STR5## where R and R.sub.1 are the same or different and are hydrogen or C.sub.1 to about C.sub.30 hydrocarbyl selected from alkyl, aryl, alkaryl, aralkyl and may optionally contain additional O, S, N or mixtures thereof with a hydrocarbyl amine and wherein the reaction is carried out at temperatures varying from ambient to about 250.degree. C. under pressures varying from ambient to about 10 psi or is autogenous and the reaction time varying from about one hour to about 48 hours sufficient to obtain the desired additive product of reaction and where the reaction is carried out in molar ratios of reactants varying from equimolar to more than molar to less than molar.18. The additive of claim 16 wherein the reactants are 2,5-bis(t-nonyl-dithio)thiadiazole and isodecyloxypropylamine.