A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene α-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.

Lubricating oil compositions.

The present invention comprises novel lubricating compositions, automotive gear lubricating compositions, and fluids useful in the preparation of finished automotive gear lubricants and finished gear oils, and methods of preparation thereof. One embodiment of the present invention comprises a lubricating composition comprising a blend of a PAO having a viscosity of greater than or equal to about 40 cSt. at 100° C. and less than or equal to about 1,000 cSt. at 100° C. and an ester having a viscosity of less than or equal to about 2.0 cSt. at 100° C., wherein said blend of said PAO and said ester has a viscosity index greater than or equal to the viscosity index of the PAO.

Lubricating fluids with enhanced energy efficiency and durability

This invention relates to a co-oligomer having an Mn of 300 to 30,000 g/mol comprising 10 to 90 mol % propylene and 10 to 90 mol % of ethylene, wherein the oligomer has at least X % allyl chain ends, where: 1) X=(−0.94 (mole % ethylene incorporated)+100), when 10 to 60 mole % ethylene is present in the co-oligomer, and 2) X=45, when greater than 60 and less than 70 mole % ethylene is present in the co-oligomer, and 3) X=(1.83*(mole % ethylene incorporated)−83), when 70 to 90 mole % ethylene is present in the co-oligomer. This invention also relates to a homo-oligomer, comprising propylene, wherein the oligomer has: at least 93% allyl chain ends, an Mn of about 500 to about 20,000 g/mol, an isobutyl chain end to allylic vinyl group ratio of 0.8:1 to 1.2:1.0, and less than 100 ppm aluminum. This invention also relates to a process of making homo-oligomer, comprising propylene, wherein the productivity is greater than 4500 g/mmol Hf (or Zr)/hour.

High vinyl terminated propylene based oligomers

This invention relates to a process to produce a polyalpha-olefin comprising: 1) contacting one or more alpha-olefm monomers having 3 to 24 carbon atoms with an unbridged substituted bis cyclopentadienyl transition metal compound having: 1) at least one non-isoolefm substitution on both cyclopentadientyl rings, or 2) at least two substitutions on at least one cyclopentadienyl ring, a non-coordinating anion activator, and optionally an alkyl- aluminum compound, where the molar ratio of transition metal compound to activator is 10:1 to 0.1 :1, and if the alkyl aluminum compound is present then the molar ratio of alkyl aluminum compound to transition metal compound is 1 :4 to 4000:1, under polymerization conditions wherein: i) hydrogen is present at a partial pressure of Q.I to 50 psi, based upon the total pressure of the reactor or the concentration of the hydrogen is from 1 to 10,000 ppm or less by weight ; ii) wherein the alpha-olefin monomer(s) having 3 to 24 carbon atoms are present at 10 volume % or more based upon the total volume of the catalyst/activator/alkylaluminum compound solutions, monomers, and any diluents or solvents present in the reaction; iii) the residence time of the reaction is at least 5 minutes; iv) the productivity of the process is at least 43,000 grams of total product per gram of transition metal compound; v) the process is continuous or semi-continuous, and vi) the temperature in the reaction zone does not rise by more than 10 °C during the reaction; and vii) ethylene is not present at more than 30 volume % of the monomers entering the reaction zone; and 2) obtaining a polyalpha-olefin (PAO), optionally hydrogenating the PAO, wherein the PAO comprises at least 50 mole% of a C3 to C24 alpha-olefin monomer, and wherein the PAO has a kinematic viscosity at 1000C of 20 cSt or less.

Process to produce low viscosity poly-alpha-olefins

This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluids.

Lubricants from mixed alpha-olefin feeds

High performance engine oils and other liquid lubricants comprise a liquid lubricant basestock of low viscosity from 1.5 to 12 cSt (110C) with two dissolved polymer components of differing molecular weights. The basestock is preferably a single PAO or blend of PAOs with a co-basestock component which is preferably an ester or an alkylated aromatic of comparable viscosity. The lower molecular weight polymer is highly viscoelastic in character and is preferably an HVI-PAO; this component in the lubricant which provides unexpectedly high film thickness and unexpectedly good wear protection under conditions where the second, higher molecular weight polymer may lose some or all of its thickening power. The use of the highly viscoelastic low molecular weight polymer in combination with the higher molecular weight thickener enables the production of very widely cross-graded engine oils, especially oils with a low temperature grading of 0W or better. Oils with cross gradings of 0W20, 0W30, 0W40 or even more widely cross graded, for example 0W70 or higher may be achieved.

High performance engine oil

Reaction products of hydrocarbylsuccinic anhydrides, polyamines and triazoles, as exemplified by XRT 2143A, have been found to be effective rust/corrosion inhibiting, thermal stabilizing and superior dispersant additives with excellent cleanliness feature for fuels and lubricants. Enhanced antioxidancy is also observed upon boration of these reaction products.

Antirust/dispersant additive for lubricants

L'invention porte sur des huiles pour moteurs a hautes performances et autres lubrifiants liquides comportant: un lubrifiant de base de faible viscosite de 1,5 a 12 cSt (110C) et deux polymeres dissous de poids moleculaire different, ledit lubrifiant de base etant de preference un seul PAO ou un melange de PAOs, ainsi qu'un co-lubrifiant de base, de preference un ester ou un aromatique alkyle de densite comparable. Le polymere de faible poids moleculaire, fortement viscoelastique, est de preference un HVI-PAO qui produit de maniere inattendue une forte epaisseur de film, et un fort pouvoir protecteur anti-usure dans des conditions ou le deuxieme polymere, de poids moleculaire plus eleve, peut perdre partiellement ou totalement son pouvoir epaississant. La combinaison d'un polymere fortement viscoelastique de faible poids moleculaire et d'un epaississeur de poids moleculaire plus eleve permet d'obtenir des huiles pour moteur largement multigrades et notamment des huiles pour basses temperatures du type OW ou mieux, et des huiles multigrades des types 0W20, 0W30, 0W40 ou meme d'indice encore plus eleve telles que par exemple du type 0W70.

Huiles pour moteurs a hautes performances

Reaction products of hydrocarbylsuccinic anhydrides, polyamines and triazoles have been found to be effective rust/corrosion inhibiting, thermal stabilizing and superior dispersant additives with excellent cleanliness feature for fuels and lubricants. Enhanced antioxidancy is also observed upon boration of these reaction products.

Raymond J. Bergstra

Papers

High performance engine oil

Antirust/dispersant additive for lubricants

Huiles pour moteurs a hautes performances

Novel antirust/dispersant additive for lubricants