Abstract: Lubricant additives having antioxidant and antiwear properties are made by reacting an oolefin such as dicyclopentadiene with sulfur and a mercaptan.

Abstract: Lubricating oils having improved antioxidant and antiwear properties are obtained by adding a minor amount of a reaction product made by reacting an olefinic hydrocarbon containing about 6-18 carbon atoms and about 1-3 olefinic double bonds concurrently with sulfur and hydrogen sulfide to obtain a reaction intermediate and reacting this intermediate with additional olefin hydrocarbon which may be the same or different. Preferred olefinic hydrocarbons are dicyclopentadiene and alloocimene.

Abstract: New compounds are derived from intra-molecular and inter-molecular, in the case of a polymer, sulphur bridged hydrocarbon rings of 12 carbon atoms. The hydrocarbon ring is preferably 1,5,9-cyclododecatriene. The compound also contains the residue of a dithiophosphoric acid containing two organic moieties. The new compounds are useful in major or minor amounts in lubricating oil compositions. The lubricating oil may be a hydraulic oil. The composition may also contain other conventional lubricant additives.

Abstract: Novel silane derivatives having the general formula: ##STR1## wherein: (A) R is a group of the formula R.sup.4 --(OR.sup.5).sub.m --OR.sup.6 --;(b) each of R.sup.1 and R.sup.2 is independently alkyl, alkenyl, aryl, alkaryl or aralkyl, a group of the formula --OR.sup.3 or a group of the formula R.sup.4 --(OR.sup.5).sub.m --OR.sup.6 --;(c) R.sup.3 is a group of the formula R.sup.4 --(OR.sup.5).sub.m -- or a group of the formula: ##STR2## (D) R.sup.4 is alkyl, alkenyl, aryl, alkaryl or aralkyl; (E) R.sup.5 is alkylene;(f) R.sup.6 is alkylene;(g) m is zero or an integer;(h) each of R.sup.7 and R.sup.8 is independently alkyl, alkenyl, aryl, alkaryl or aralkyl, a group of the formula --OR.sup.9 or a group of the formula R.sup.4 --(OR.sup.5).sub.m --OR.sup.6 --; and(i) R.sup.9 is a group of the formula R.sup.4 --(OR.sup.5).sub.m --.Also disclosed are hydraulic fluids containing the novel compounds.

Abstract: New compounds are derived from intramolecular and intermolecular, in the case of a polymer, sulfur-bridged hydrocarbon rings containing from 6 to 12 carbon atoms. The hydrocarbon ring is preferably derived from 1,5-cyclooctadiene. The compounds also contain the residue of an alkoxyalkyl or aryloxyalkyl xanthate and may also contain the residue of a further nucleophilic group. The new compounds are useful in lubricating oil compositions. The compositions may also contain other conventional lubricant additives.

Abstract: As novel compounds, orthosilicate esters having the general formula: ##STR1## wherein R.sup.1 is a propylene glycol monoalkyl ether residue containing from 1 to 8 carbon atoms in the terminal alkyl group or is a tertiary alkyl group; each of R.sup.2, R.sup.3 and R.sup.4 is the same or different and is an ethylene or propylene glycol monoalkyl ether residue containing from 1 to 8 carbon atoms in the terminal alkyl group or is a tertiary alkyl group, provided that when R.sup.1 is a propylene glycol monoalkyl ether residue each of R.sup.2, R.sup.3 and R.sup.4 are also propylene glycol monoalkyl ether residues; the total number of carbon atoms in R.sup.1, R.sup.2, R.sup.3, and R.sup.4 being at least 15 and at least one of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 being a glycol monoalkyl ether residue. Also disclosed are hydraulic fluids containing the novel compounds.