Abstract: The present invention is directed to ashless detergents comprising the products resulting from the reaction of a salicylic acid, organic group substituted salicylic acid, sulfonic acid or organic groups substituted sulfur acid with thiadiazole or organic group substituted thiadiazole or an alkyl primary or secondary amine, and to formulated lubricating oils containing said ashless detergents.

Abstract: A crankcase lubricating oil composition comprises an oil of lubricating viscosity, in a major amount, and, in respective minor amounts, a boron-containing additive and one or more co-additives, wherein the lubricating oil composition has greater than 200 ppm by mass of boron, less than 600 ppm by mass of phosphorus and less than 4000 ppm by mass of sulfur, based on the mass of the oil composition. Such compositions demonstrate provide improved wear performance.

Abstract: A composition is disclosed which comprises a lubricating oil and a refrigerant, wherein the lubricating oil comprises a polyalkyleneglycol derivative of the formula (I): RX(RaO)x(RbO)y(RcO)zRd, wherein: X?O or S, R is a C3 to C15 substituent comprising a heterocyclic ring, in which the heteroatom(s) in said ring is (are) oxygen and/or sulphur, Ra is a C2 alkylene group, Rb is a C3 alkylene group, Rc is a C4 alkylene group, Rd is the same as R, or is H, a C1-C20 alkyl or a C1-C20 acyl, x, y, z are each independently 0 or an integer of 100 or less, and x+y+z=4 to 100, but excluding compositions where the refrigerant is halogen-free and R contains a carbonate group. The use of borate esters as dehydrogenating agents in conjunction with the above lubricating oils is also disclosed.

Abstract: A composition is disclosed which comprises a lubricating oil and a refrigerant, wherein the lubricating oil comprises a polyalkyleneglycol derivative of the formula (I): RX(RaO)x(RbO)y(RcO)zRd, wherein: X=O or S, R is a C3 to C15 substituent comprising a heterocyclic ring, in which the heteroatom(s) in said ring is (are) oxygen and/or sulphur, Ra is a C2 alkylene group, Rb is a C3 alkylene group, Rc is a C4 alkylene group, Rd is the same as R, or is H, a C1-C20 alkyl or a C1-C20 acyl, x, y, z are each independently 0 or an integer of 100 or less, and x+y+z=4 to 100, but excluding compositions where the refrigerant is halogen-free and R contains a carbonate group. The use of borate esters as dehydrogenating agents in conjunction with the above lubricating oils is also disclosed.

Abstract: Oil soluble viscosity index improver composition comprising a mixture of: (A) at least one molecular weight degraded copolymer of ethylene and at least one other alpha-olefin monomer; and (B) at least one substantially undegraded copolymer of ethylene and at least one other alpha-olefin monomer. The ethylene alpha-olefin copolymers before degradation can be polymerized by a variety of available technologies including Ziegler-Natta, metallocene and diimine catalysis, as well as batch, continuous stirred tank and tubular reactors to produce copolymers having both broad or narrow molecular weight and compositional distributions. Use of degraded/non-degraded copolymer mixtures facilitates the preparation of viscosity index improvers for oils having targeted levels of shear stability index.

Abstract: A marine diesel engine lubricant composition having a TBN of at least 10 and preferably a VI of at least 90, comprises a major amount of oil of lubricating viscosity, and admixed therewith, minor amounts of an ashless antiwear additive and a metal detergent in the form of

Abstract: The invention relates to the use of an effective quantity of borated compounds having the following general formula I: ##STR1## in which X is S or O, and R is a hydrocarbyl group containing at least 3 carbon atoms, in particular between 3 and 50 carbon atoms and preferably between 3 and 17 carbon atoms, as an additive improving the compatibility of a lubricating oil composition, comprising dispersants containing basic nitrogen atoms, with fluorocarbon elastomers. In a preferred fashion, the compound of general formula I is borated glycerol monooleate and the concentration of the compound of general formula I is such that the % Boron/% basic N ratio of the lubricating composition varies from 0.25 to 5.

Abstract: The use of an effective amount of a compound as an additive improving the compatibility of a lubricating oil formulation having dispersants containing basic nitrogen atoms, with fluorocarbon elastomer seals. That compound has the formula: ##STR1## wherein R and R.sup.1 are independently alkoxycarbonyl, alkenyloxycarbonyl, aryloxycarbonyl, alkylcarbonyl, alkenylcarbonyl, arylcarbonyl, or arylalkyl, or together form a carbocycle, and R.sup.2 and R.sup.3 are independently sulfurized alkyl, alkoxycarbonylalkyl, arylalkyl, or borated hydroxyalkyl, with the proviso that R, R.sup.1, R.sup.2 and R.sup.3 together contain sufficient carbon atoms to render the compound oil soluble in an oil of lubricating viscosity.

Abstract: Sulfur-containing boroester compounds useful as antiwear additives for oleaginous compositions including alicyclic borate thioesters having the general formula (I): ##STR1## wherein R.sub.1 is a hydrocarbyl radical having 4 to 12 carbon atoms, R.sub.2 and R.sub.3 are independently selected from --(OR.sub.4).sub.n SR.sub.1 and --(OR.sub.4).sub.n SR.sub.1 OH; R.sub.4 is a hydrocarbyl radical having 1 to 6 carbon atoms; n is an integer of from 1 to 4; and l and m are independently 0, 1 or 2; thioalkyl-substituted cyclic meta borate esters having the general formula (II): ##STR2## wherein n, R.sub.1 and R.sub.4 are defined as in formula (I); and mixtures of the alicyclic compounds of formula (I) and the cyclic compounds of formula (II).