Phosphorus, nitrogen and sulfo-containing additives

Abstract

Additives made by reaction of (A) at least one phosphorus acid compound of the formula: ##STR1## wherein each X is independently oxygen or divalent sulfur, M is hydrogen or an equivalent of metal or ammonium cation, R is a hydrogen atom or a hydrocarbyl or hydrocarbyloxy or hydrocarbyl mercapto group of about one to about 30 carbon atoms and R' is XM or R with the proviso that the total number of carbon atoms in both R and R' is at least two, with (B) at least one sulfo-containing compound of the formula: ##STR2## .[.or.]. .Iadd.and .Iaddend. ##STR3## wherein y is one or two, R 3 is hydrogen or lower alkyl group, R 2 is a divalent or trivalent hydrocarbyl group, R 4 is a trivalent hydrocarbyl group, and Q is --OH, --OR 3 , --OM, an alkylene polyamine residue, or N(R 3 ) 2 , are novel and useful and have utility as, for example, additives for water-containing hydraulic fluids.

What is claimed is: 
     
       1. A lubricating oil comprising a major amount of oil and a minor amount of at least one additive sufficient to impart improved load-carrying properties thereto wherein said additive is a sulfo-, nitrogen- and phosphorus-containing additive selected from those corresponding to the formulae: ##STR22## and mixtures of two or more such additives wherein z is one or two, each X is independently oxygen or divalent sulfur, R is hydrogen or a hydrocarbyl, hydrocarbyloxy, or hydrocarbyl mercapto group of about one to about 30 carbon atoms, and R' is XM or R, M being a hydrogen, an equivalent of a metal or ammonium cation, with the proviso that the total number of carbon atoms in both R and R' is at least two, y is one or two, each R 3  is independently hydrogen or lower alkyl group of one to seven carbon atoms. R 2  is di- or trivalent hydrocarbyl group having one to 18 carbon atoms, R 4  is a trivalent hydrocarbyl group having one to 18 carbon atoms, and Q is selected from the group consisting of --OH, --OR 3 , --OM, --O(Alkylene--O) n  --R 3 , --N(R 3 ) 2 , --NR 3  (Alkylene-NR 3 ) n  R 3 , .[.--OH(R 3 ) 4 ,.]. .Iadd.--ON(R 3 ) 4 , .Iaddend.and ---ONR 3  -(Alkylene-NR 3 ) n  R 3 , wherein n has an average value of about one to about 10, M is as defined above and the alkylene group has from one to 10 carbon atoms. 
     
     
       2. The oil of claim 1 wherein R' is the same as R and R is a hydrocarbyloxy group containing one to about 18 carbon atoms and each X is oxygen. 
     
     
       3. The oil of claim 1 wherein each X is a divalent sulfur atom and R and R' are independently C 1  -C 18  alkoxy groups. 3 
     
     
       4. The oil of claim 1 wherein M is a Group I, II(A) or II(B) metal cation. 
     
     
       5. The oil of claim 1 wherein Q is selected from the group consisting of --NR 3  (Alkylene--NR 3 ) n  R 3  and --ONR 3   3  -(Alkylene-NR.sup. 3) n  R 3  and mixtures thereof. 
     
     
       6. The oil of claim 1 wherein Q is --O(Alkylene--O) n  R 3 . 
     
     
       7. A concentrate comprising a substantially inert liquid diluent or solvent and at least one additive as claimed in claim 1. 
     
     
       8. A concentrate comprising about 60 to about 5 parts of a substantially inert diluent or solvent and 40 to 95 parts of at least one additive as claimed in claim 1. .Iadd. 9. A lubricating oil comprising a major amount of oil and a minor amount of at least one additive sufficient to impart improved load-carrying properties thereto wherein said additive is a sulfo-, nitrogen- and phosphorus-containing additive made by reacting (A) at least one phosphorus acid compound of the formula: ##STR23##.Iaddend.  wherein each X is independently oxygen or divalent sulfur, M is hydrogen or an equivalent of metal or ammonium cation, R is a hydrogen atom or a hydrocarbyl or hydrocarbyloxy or hydrocarbyl mercapto group of about one to about 30 carbon atoms and R' is XM or R with the proviso that the total number of carbon atoms in both R and R' is at least two, with   (B) at least one sulfo-containing compound of the formula: ##STR24##  wherein y is one or two, R 3  is hydrogen or lower alkyl group, R 2  is a divalent or trivalent hydrocarbyl group, R 4  is a trivalent hydrocarbyl group, and Q is --OH, --OR 3 , --OM, an alkylene   
     
     
        polyamine residue, or N(R 3 ) 2 .  .Iadd. 10.  An oil as claimed in claim 9 wherein each X is sulfur. .Iaddend..Iadd. 11. An oil as claimed in claim 10 wherein the sulfo-containing compound (B) is selected from the group consisting of 2-acrylamidoethanesulfonic acid, 2-acrylamidopropanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 1-1-bis(acrylamido)-2-methyl propane-2-sulfonic acid, and mixtures of same. .Iaddend..Iadd. 12. An oil as claimed in claim 9 wherein the sulfo-containing compound (B) is 2-acrylamido-2-methylpropanesulfonic acid. .Iaddend..Iadd. 13. An oil as claimed in claim 11 wherein the sulfo-containing compound (B) is 2-acrylamido-2-methylpropanesulfonic acid. .Iaddend..Iadd. 14. An oil as claimed in claim 9 wherein (B) is of the formula ##STR25## 
     
     
       .Iaddend. .Iadd. 15.  An oil as claimed in claim 1 wherein the additive is of the formula ##STR26##.Iaddend. wherein R and R' are C 1-10  alkyl groups and each R 3  is independently hydrogen or an alkyl group of one to seven carbon atoms. 
     
     
        .Iadd. 16.  An oil as claimed in claim 14 wherein R 3  is methyl. .Iaddend.