摘要:
A method of producing a clear dispersant OCP VI improver. The method comprises admixing a polar modifier to a VI improver during the preparation process or to a final product at a sufficiently high temperature to produce the desired clear dispersant VI improver.
摘要:
A dispersant/antioxidant bound VII polymethacrylate lubricant additive composition prepared by:(a) combining a polyunsaturated monomer with (C.sub.1 -C.sub.20) alkyl monomers and, optionally, a dispersant monomer in an oil solvent to provide an intermediate reaction mixture;(b) stirring and purging the reaction mixture;(c) heating the purged mixture and adding a radical polymerization catalyst to the purged mixture;(d) heating the mixture to a sufficiently high temperature to remove any excess of the polymerization catalyst therefrom;(e) (optionally) recovering the intermediate product polymethacrylate;(f) combining the intermediate product with an aromatic nitroso compound to provide an intermediate reaction mixture;(g) stirring and purging the intermediate reaction mixture; and(h) recovering from the purged mixture the product polymethacrylate.
摘要:
Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived from N-vinyl pyrrolidone and phenothiazine.
摘要:
Fuel oils and lubricants of improved properties contain ethylene-propylene copolymers bearing units derived from N-vinyl pyrrolidone and phenothiazine.
摘要:
Multifunctional viscosity index improvers for lubricating oils containing an EPM or EPDM polymer onto which has been grafted an unsaturated reactive monomer and thereafter reacted with amines containing sulfonamide units.
摘要:
An additive composition comprising a graft and amine-derivatized copolymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 to C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene, the copolymer having a number average molecular weight ranging from about 5,500 to about 50,000 and having grafted thereon at least 1.8 molecules of a carboxylic acid acylating function per molecule of the copolymer and reacting the grafted copolymer with an amine substituted phenothiazine to form the grafted and amine-derivatized copolymer, and a lubricating oil composition containing same are provided.
摘要:
A lubricating oil contains, as a multifunctional additive, a polymer such as an ethylene - propylene copolymer, bearing graft moieties derived from allyl glycidyl ether, or glycidyl methacrylate as a graft monomer polymer being functionalized with (i) N-vinyl pyrrolidone and (ii) a Mannich base formed by the reaction p-nonyl phenol, N-(aminoethyl) piperazine, and formaldehyde.
摘要:
An oil containing a viscosity index improver of improved oxidative stability contains, as an anti-oxidant system, 2,6-di-t-butylphenol and N-aminoethylpiperazine.
摘要:
Dispersant viscosity index improvers for lubricating oils contain an EPR or EPT polymer onto which has been graft polymerized isocyanatoethyl methacrylate and thereafter reacted with N-methyl piperazine.