1
John B Gardiner, Martyn N Dick: Viscosity index improver--dispersant additive useful in oil compositions. Exxon Chemical Patents, F T Johmann, W G Muller, M B Kapustij, October 25, 1988: US04780228 (101 worldwide citation)

Hydrocarbon polymers such as ethylene copolymers may be reacted with unsaturated nitrogen-containing monomers or unsaturated carboxylic acids in the presence of a free radical catalyst such as a peroxide or azo free radical initiator and a chain stopping agent, e.g. a mercaptan to inhibit excessive ...


2
Robert L Elliott, John B Gardiner: Polymeric additives for fuels and lubricants. Exxon Research & Engineering Co, R A Dexter, F T Johmann, March 13, 1979: US04144181 (92 worldwide citation)

Oil-soluble, derivatized ethylene copolymers derived from about 2 to 98 wt. % ethylene, and one or more C.sub.3 to C.sub.28 alpha-olefins, e.g. propylene, which are grafted, preferably solution-grafted under an inert atmosphere and at elevated temperatures and in the presence of a high-temperature d ...


3
Antonio Gutierrez, Darrell W Brownawell, Ricardo Bloch, Jack E Johnston: Ethylene copolymer viscosity index improver-dispersant additive useful in oil compositions. Exxon Research & Engineering Co, F T Johmann, R A Maggio, December 30, 1986: US04632769 (78 worldwide citation)

Oil soluble viscosity index improving ethylene copolymers, such as copolymers of ethylene and propylene; and ethylene, propylene and diolefin; etc., are reacted or grafted with ethylenically unsaturated carboxylic acid moieties, preferably maleic anhydride moieties, and reacted with polyamines havin ...


4
Vijaya K Varma, Esther D Winans, Rosemary O Halloran, Phillip W Brewster: Multifunctional viscosity index improver. Exxon Chemical Patents, F T Johmann, W G Muller, September 15, 1987: US04693838 (72 worldwide citation)

Hydrocarbon polymers such as ethylene copolymers may be reacted with unsaturated nitrogen-containing monomers or unsaturated carboxylic acids in a synthetic hydrocarbon lubricating oil in the presence of a free radical initiator such as a peroxide. The copolymer grafted directly with the nitrogen-co ...


5
David Y Chung: Viscosity index improver-dispersant additive. Exxon Chemical Patents, F T Johmann, M B Kapustij, April 5, 1988: US04735736 (31 worldwide citation)

Oil soluble hydrocarbon polymers, useful as V.I. improvers, such as ethylene copolymer, preferably ethylene-propylene copolymer, are grafted with an unsaturated acid material, such as maleic anhydride, preferably by solid state grafting followed by reaction with a polyamine, preferably a tertiary-pr ...


6
Gary W Ver Strate, William W Graessley, Edward N Kresge: Hydrocarbon solutions of macromolecular polymers having an improved resistance to mechanical degradation. Exxon Research & Engineering Co, F T Johmann, E T Wheelock, October 28, 1986: US04620048 (30 worldwide citation)

Fluid solutions, e.g. mineral oil solutions, of polydispersed polymers have improved resistance to mechanical shear when said polymers have a narrow molecular weight distribution, i.e. ##EQU1## 10 and/or a reduced compliance less than that of a linear monodisperse polymer of the same chemical repeat ...


7
Phillip W Brewster, Clinton R Smith: Haze-free polymer additives for fuels and lubricants. Exxon Research & Engineering Co, F T Johmann, J J Mahon, W G Muller, November 17, 1987: US04707285 (28 worldwide citation)

Solutions of ethylene-propylene copolymers grafted with vinyl containing monomers, maleic anhydride or ethylenically unsaturated acids including functionalized derivatives thereof, reacted with polyols, polyamines and hydroxamines, as well as hydrogenated butadiene or isoprene copolymers, which solu ...


8
Robert D Tack, Sarah L Pearce, Albert Rossi: Middle distillate compositions with improved cold flow properties. Exxon Chemical Patents, F T Johmann, R A Maggio, M B Kapustij, December 15, 1987: US04713088 (27 worldwide citation)

The low temperature properties of a distillate petroleum fuel oil boiling in the range 120.degree. C. to 500.degree. C., and whose 20% and 90% distillation points differ by less than 100.degree. C., and/or whose Final Boiling Point is in the range 340.degree. C. to 370.degree. C. are improved by the ...


9
Thomas J McCrary: High temperature peroxide induced telomerization processes for grafting vinyl nitrogen containing monomers onto olefin polymers. Exxon Research & Engineering Company, F T Johmann, M B Kapustij, March 7, 1989: US04810754 (23 worldwide citation)

There are disclosed concentartion controlled, high temperature solution telomerization processes for graft copolymerizing ethylene alpha-olefin copolymers or forming acrylate copolymers, uti.lizing dialkyl peroxides at temperatures of 185.degree.-250.degree. C. wherein a molar excess of 3-10 moles o ...


10
Terence Colclough: Lubricating and petroleum fuel oil compositions containing azole polysulfide wear inhibitors. Exxon Research & Engineering Co, F T Johmann, R A Dexter, August 1, 1978: US04104179 (17 worldwide citation)

Azole aminopolysulfides and azine aminopolysulfides are effective as ashless antiwear agents for lubricating oils, particularly when used in combination with an ashless dispersant.