James Stokes

US Patent:

6310010, Oct 30, 2001

Filed:

Apr 9, 1999

Appl. No.:

9/291578

Inventors:

Gary Higton - Oxford, GB
Jacob Emert - Brooklyn NY
Robert A. Wilkinson - Newbury, GB
Isabel P. MacDonald - East Hendred, GB
Karl J. Van Driesen - North Brunswick NJ
Salvatore Rea - Franklin Square NY
James P. Stokes - Annandale NJ
Andrew J. D. Ritchie - Chatham NJ

Assignee:

Exxon Chemicals Patents INC - DE

International Classification:

C10M16500

US Classification:

508192

Abstract:

Concentrates for lubricating oil compositions are prepared by mixing at elevated temperature: (i) at least one high molecular weight ashless dispersant; (ii) at least one oil-soluble overbased metal detergent; and (iii) at least one surface-active agent comprising a low molecular weight hydroxyl or amine group.

US Patent:

61720151, Jan 9, 2001

Filed:

Jul 21, 1999

Appl. No.:

9/358059

Inventors:

Jacob Emert - Brooklyn NY
Albert Rossi - Warren NJ
David E. Gindelberger - Bedminster NJ
Jon E. Stanat - Chester NJ
James P. Stokes - Katy TX
Jaimes Sher - Houston TX

Assignee:

Exxon Chemical Patents, Inc - Baytown TX

International Classification:

C10M14510
C10L 118

US Classification:

508472

Abstract:

Polar monomer-containing copolymers derived from at least one. alpha. ,. beta. unsaturated carbonyl compound, such as alkyl acrylates and one or more olefins, such olefins including ethylene and C. sub. 3 -C. sub. 20. alpha. -olefins such as propylene and 1-butene, which copolymers 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 branches per 100 carbon atoms of the copolymer chains comprising the copolymer; (c) at least about 50% of said branches being methyl and/or ethyl branches; (d) substantially all of said incorporated polar monomer is present at the terminal position of said branches; (e) at least about 30% of said copolymer chains terminated with a vinyl or vinylene group; (f) a number average molecular weight, Mn, of from about 300 to about 15,000 when the copolymer is intended for dipersant or wax crystal modifier uses and up to about 500,000 where intended for viscosity modifier uses; and (g) substantial solubility in hydrocarbon and/or synthetic base oil. The copolymers are produced using late-transition-metal catalyst systems and, as an olefin monomer source other than ethylene preferably inexpensive, highly dilute refinery or steam cracker feed streams that have undergone only limited clean-up steps. Fuel and lubricating oil additives, are produced.

US Patent:

6066603, May 23, 2000

Filed:

Jul 21, 1997

Appl. No.:

8/897959

Inventors:

Jacob Emert - Brooklyn NY
Albert Rossi - Warren NJ
David E. Gindelberger - Bedminster NJ
Jon E. Stanat - Chester NJ
James P. Stokes - Katy TX
Jaimes Sher - Houston TX

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C10M14510
C10L 118

US Classification:

508472

Abstract:

Polar monomer-containing copolymers derived from at least one. alpha. ,. beta. unsaturated carbonyl compound, such as alkyl acrylates and one or more olefins, such olefins including ethylene and C. sub. 3 -C. sub. 20. alpha. -olefins such as propylene and 1-butene, which copolymers 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 branches per 100 carbon atoms of the copolymer chains comprising the copolymer; (c) at least about 50% of said branches being methyl and/or ethyl branches; (d) substantially all of said incorporated polar monomer is present at the terminal position of said branches; (e) at least about 30% of said copolymer chains terminated with a vinyl or vinylene group; (f) a number average molecular weight, Mn, of from about 300 to about 15,000 when the copolymer is intended for dispersant or wax crystal modifier uses and up to about 500,000 where intended for viscosity modifier uses; and (g) substantial solubility in hydrocarbon and/or synthetic base oil. The copolymers are produced using late-transition-metal catalyst systems and, as an olefin monomer source other than ethylene preferably inexpensive, highly dilute refinery or steam cracker feed streams that have undergone only limited clean-up steps. Fuel and lubricating oil additives, particularly dispersants, wax crystal modifiers and flow improvers, are produced.