C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
253/102, 400/202
C08F 287/00 (2006.01) C08F 8/32 (2006.01) C08F 255/02 (2006.01) C10M 143/02 (2006.01) C10M 149/00 (2006.01) C10M 149/02 (2006.01) C10M 149/06 (2006.01) C10M 149/10 (2006.01) C10M 171/04 (2006.01)
Patent
CA 2025992
ABSTRACT OF THE DISCLOSURE Composition of matter useful as a multifunctional viscosity index improver for lubricating oils comprising reaction product of: (i) (a) degraded ethylene-alpha-olefin copolymer obtained by degrading undegraded copolymer of ethylene and at least one other alpha-olefin monomer, said undegraded copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units and at least one low crystallinity ethylene-alpha- olefin copolymer segment, wherein said at least one crystallizable segment comprises at least about 10 weight percent of said copolymer chain and contains at least about 57 weight percent of said copolymer chain and contains at least about 57 weight percent ethylene, wherein said low crystallinity segment contains not greater than about 53 weight percent ethylene, and wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of ?w/?n of less than 2 and a ratio of ?z/?w of less than 1.8 and wherein at least two portions of an individual intra- molecularly heterogeneous chain, each portion comrising at least 5 weight percent of said chain, differ in composition form one another by at least 7 weight percent ethylene; said degraded copolymer grafted with (b) ethylenically monounsaturated carboxylic acid material having 1 to 2 carboxylic acid groups or anhydride group to form grafted degraded ethylene copolymer; and (ii) at least one polyamine containing one primary amino group and at least one tertiary amino group.
Chung David Y.
Struglinski Mark J.
Borden Ladner Gervais Llp
Chung David Y.
Exxon Chemical Patents Inc.
Struglinski Mark J.
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