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Jacob Emert, Albert Rossi, Salvatore Rea, Jeffrey W Frederick, Mahn W Kim: Polymers derived from ethylene and 1-butene for use in the preparation of lubricant dispersant additives. Exxon Chemical Patents, Harvey L Cohen, March 12, 1996: US05498809 (151 worldwide citation)

The invention pertains to oil soluble copolymers derived from ethylene and 1-butene which have a number average molecular weight between about 1,500 and 7,500, at least about 30 percent of all polymer chains terminated with ethylvinylidene groups, and ethylene-derived content of not greater than abo ...


2
Won R Song, Albert Rossi, Howard W Turner, Howard C Welborn, Robert D Lundberg, Antonio Gutierrez, Robert A Kleist: Ethylene alpha-olefin polymer substituted mono- and dicarboxylic acid dispersant additives (PT-920). Exxon Chemical Patents, J B Murray Jr, T V Kowalchyn, July 20, 1993: US05229022 (77 worldwide citation)

The present invention is directed to an oil-soluble fuel and lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic ...


3
Albert Rossi, Salvatore Rea, Jon Edmond Stanat, Linda Kay Wright, Kenneth Lee Kaufman, Harold Wilbur Margo, Jeffery William Frederick, Robert Martin Koros: Dilute process for the polymerization of ethylene/.alpha.-olefin copolymer using metallocene catalyst systems. Exxon Chemical Patents, Harvey L Cohen, January 6, 1998: US05705577 (66 worldwide citation)

An improved process for the copolymerization of ethylene and .alpha.-olefins utilizing highly dilute .alpha.-olefin feedstreams to effect high conversions and catalyst productivities. The instant invention is particularly adaptable to copolymerizing the .alpha.-olefin content of commercially availab ...


4
Albert Rossi, Jacob Emert, David Edward Gindelberger, Jon Edmond Stanat, James Peter Stokes, Jaimes Sher: Polymers derived from olefins useful as lubricant and fuel oil additives, processes for preparation of such polymers and additives and use thereof (PT-1267). Exxon Chemical Patents, September 22, 1998: US05811379 (60 worldwide citation)

Polymers (including copolymers) derived from one or more olefins, such including ethylene and C.sub.3 -C.sub.20 .alpha.-olefins such as propylene and 1-butene, which polymers have (a) an average ethylene sequence length, ESL, of from about 1.0 to less than about 3.0; (b) an average of at least 5 bra ...


5
Albert Rossi, Salvatore Rea, Jon E Stanat, Linda K Wright, Kenneth L Kaufman, Jeffrey W Frederick, Robert Martin Koros, Harold Wilbur Margo: Dilute process for the polymerization of non-ethylene .alpha.-olefin homopolymers and copolymers using metallocene catalyst systems. Exxon Chemical Patents, J F Hunt, H L Cohen, January 12, 1999: US05859159 (59 worldwide citation)

An improved process for the homopolymerization and copolymerization of .alpha.-olefins utilizing highly dilute .alpha.-olefin feedstreams to effect high conversions and catalyst efficiencies in the production of non-ethylene copolymers. The instant invention is particularly adaptable to polymerizing ...


6
Albert Rossi: Pour point depressant additive for fuels and lubricants. Exxon Research & Engineering Co, Roland A Dexter, December 23, 1980: US04240916 (56 worldwide citation)

An oil-soluble copolymer, useful as a pour point depressant for lubricating oils, is composed of about equimolar amounts of 1-olefins and maleic anhydride, said 1-olefins being a mixture comprising from about 25 to 75, preferably 30 to 55, mole percent of straight chain C.sub.20 -C.sub.24 1-olefins ...


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Albert Rossi, Jacob Emert, David Edward Gindelberger, Jon Edmond Stanat, James Peter Stokes, Jaimes Sher: Polymers derived from olefins useful as lubricant and fuel oil additives, processes for preparation of such polymers and additives and use thereof. Exxon Chemical Patents, January 25, 2000: US06017859 (40 worldwide citation)

Polymers (including copolymers) derived from one or more olefins, such including ethylene and C.sub.3 -C.sub.20 .alpha.-olefins such as propylene and 1-butene, which polymers have (a) an average ethylene sequence length, ESL, of from about 1.0 to less than about 3.0; (b) an average of at least 5 bra ...


9
Albert Rossi, William J Fernandez: Dual pour depressant combination for viscosity index improved waxy multigrade lubricants. Exxon Research & Engineering Co, Roland A Dexter, May 9, 1978: US04088589 (32 worldwide citation)

Multigrade lubricating oils blended from petroleum distillates and, if desired, a bright stock containing waxy or wax-like components and modified by the presence of copolymeric ethylene-higher alpha-olefins viscosity index improving agents have their low temperature performance markedly improved wh ...


10
Won R Song, Albert Rossi, Howard W Turner, Howard C Welborn, Robert D Lungberg, Antonio Gutierrez, Robert A Kleist: Ethylene alpha-olefin polymer substituted mono-and dicarboxylic acid lubricant dispersant additives. Exxon Chemical Patents, J B Murray Jr, K R Walton, January 11, 1994: US05277833 (30 worldwide citation)

The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 10,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or a ...