Title:
【発明の名称】潤滑油及び燃料油添加剤として有用なオレフィンから誘導された極性単量体含有共重合体、かかる共重合体及び添加剤の製造法、並びにそれらの使用
Document Type and Number:
Japanese Patent JP2000514864
Kind Code:
A
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 C3-C20 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. Where functionalization and derivatization of these copolymers are required for such additives it is facilitated by the olefinic structures available in the copolymer chains.
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Inventors:
Emmaart, Jacob Isaac
Rossi, Albert
Sindelberger, David Edward
Stannat, John Edmond
Stokes, James Peter
Shah, High Mace
Rossi, Albert
Sindelberger, David Edward
Stannat, John Edmond
Stokes, James Peter
Shah, High Mace
Application Number:
JP50700898A
Publication Date:
November 07, 2000
Filing Date:
July 14, 1997
Export Citation:
Assignee:
Exxon Chemical Patents Incorporated
International Classes:
C08F210/00; C10L1/195; C10L1/198; C10L1/236; C10L1/238; C10L1/24; C10L1/30; C10L10/00; C10M145/04; C10M145/14; C10M149/04; C10M149/06; C10M157/00; C10N30/04; C10N40/25; (IPC1-7): C10M145/14; C10M145/04; C10M149/04
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)