Gear oil additive composition and gear oil containing the same
Gear oil additive compositions and gear oils containing the same Patent #: 5225093
ApplicationNo. 081532 filed on 05/19/1998
US Classes:508/189, Nitrogen containing (i.e., nitrogen and boron in the same compound)252/77, Organic compounds of nonmetals other than C, H, and O508/192, The nitrogen heterocyclic ring has chalcogen bonded directly to ring carbon adjacent to ring nitrogen (e.g., succinimide compounds, etc.)508/287, Plural oxygens double bonded directly to ring carbons of the hetero ring which are adjacent to the ring nitrogen508/433, Divalent chalcogen double bonded directly to the phosphorus508/436, Organic nitrogen compound salt of phosphorus acid, or organic nitrogen compound is present with phosphorus acid508/527, Organic nitrogen salt of a carboxylic acid, or an organic nitrogen compound is present508/569Sulfides (i.e., plural carbons bonded directly to a single sulfur atom or sulfur chain)
ExaminersPrimary: McAvoy, Ellen M.
Attorney, Agent or Firm
Foreign Patent References
International ClassesC10M 141/10
AbstractGear oils and gear oil additive concentrates of enhanced positraction performance are described. They comprise: (i) at least one oil-soluble sulfur-containing extreme pressure or antiwear agent; (ii) at least one oil-soluble amine salt of a partial ester of an acid of phosphorus; and (iii) at least one oil-soluble succinimide of the formula ##STR1## where R1 is an alkyl or alkenyl group having an average of 8 to 50 carbon atoms, and each of R2, R3 and R4 is a hydrogen atom or an alkyl or alkenyl group having an average of up to about 4 carbon atoms. These compositions preferably contain one, more preferably two, and most preferably all three of the following additional components: (iv) at least one amine salt of a carboxylic acid; (v) at least one nitrogen-containing ashless dispersant; and (vi) at least one trihydrocarbyl ester of a pentavalent acid of phosphorus.