摘要:
The synthesis of high performance polyvinyl ether (PVE) 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.
摘要:
Provided is a polyalphaolefin (PAO) fluid including a polymer of one or more C8 to C12 alphaolefin monomers. The PAO has a viscosity (Kv100) from 300 to 900 cSt at 100° C.; a viscosity index (VI) greater than 250; a pour point (PP) less than −25° C.; a molecular weight distribution (Mw/Mn) less than 2.0 as synthesized; a residual unsaturation (Bromine Number) less than 2.0; and a glass transition temperature Tg less than −60° C. The PAO also has no crystallization peak as measured by differential scanning calorimetry and high thermal stability. A process to make and use the PAOs, including those having any combination of characteristics above is also provided. The PAOs are useful as synthetic base stocks and co-base stocks in lubricating oils, e.g., industrial lubes.