Polyvinyl ether based high performance synthetic fluids prepared using cationic polymerization
AssigneeExxonMobil Research and Engineering Company
InventorsAbhimanyu Onkar Patil, Satish Bodige, Ranjan Tripathy
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Abstract
The synthesis of high performance polyvinyl ether (PVE) synthetic fluids using a Lewis acid based cationic polymerization process is disclosed. The polyvinyl ether fluid have repeating vinyl ether units of the general formula —[CH2—CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units in the polyvinyl ether. The resulting PVE fluids exhibit excellent lubricant properties, similar to poly-alpha olefins (PAOs), but the PVE fluids have the benefit of higher polarity than PAOs and thus have better solubility and dispersity of polar additives.
Claims32
A composition comprising one or more compounds consisting essentially of repeating units of the general formula —[CH2—CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units in the polyvinyl ether, wherein said composition has a viscosity (Kv100)≧2 and a viscosity index (VI)≧100.
A composition comprising one or more compounds consisting essentially of repeating vinyl ether units of the general formula —[CH2-CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units in the polyvinyl ether, wherein said composition is produced by reacting a vinyl ether monomer (R≧4) or combinations thereof in the presence of a Lewis acid catalyst under conditions and for a time sufficient to produce said composition.
A lubricating oil base stock comprising one or more compounds consisting essentially of repeating vinyl ether units of the general formula —[CH2-CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units, and wherein said composition has a viscosity (Kv100)≧2, a viscosity index (VI)≧100, a molecular weight distribution (MWD) between 2 and 50, and a pour point (PP) of ≦30° C.
A lubricating oil comprising a lubricating oil base stock as a major component, and one or more compounds consisting essentially of repeating vinyl ether units of the general formula —[CH2-CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units, and wherein said composition has a viscosity (Kv100)≧2, a viscosity index (VI)≧100, a molecular weight distribution (MWD) between 2 and 50, and a pour point (PP) of ≦30° C.
A process for preparing a composition comprising polyvinyl ether, said process comprising:
- a. contacting one or more vinyl ether monomers or oligomers of the general formula CH2=CH—O—R, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms, with one or more Lewis acid catalysts;
- and
- b. maintaining contact between the vinyl ether and the Lewis acid catalyst under conditions and for a time sufficient to produce said composition,
- wherein the composition consists essentially of one or more compounds containing repeating units of the general formula —[CH2—CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units in the polyvinyl ether, wherein said composition has a viscosity (Kv100)≧2 and a viscosity index (VI)≧100.
A method for improving one or more of solubility and dispersancy of polar additives in a lubricating oil by using as the lubricating oil a formulated oil comprising a lubricating oil base stock as a major component, and one or more compounds consisting essentially of repeating vinyl ether units of the general formula —[CH2-CH (O—R)]n, wherein R is comprised of a branched or linear alkyl group having at least 4 carbon atoms and n is a whole number representing the average number of repeating units, and wherein said composition has a viscosity (Kv100)≧2, a viscosity index (VI)≧100, a molecular weight distribution (MWD) between 2 and 50, and a pour point (PP) of ≦30° C.
Dependencies are inferred from the claim text.