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US 5,290,868 AGranted
Multifunctional viscosity index improver derived from polyamine containing one primary amine group and at least one secondary amine group and degraded ethylene copolymer
AssigneeExxon Chemical Patents Inc.
InventorsDavid Y. Chung, Antonio Gutierrez, Mark J. Struglinski
Life of this patent
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Abstract
An oil soluble nitrogen containing grafted degraded ethylene copolymers useful as multifunctional viscosity index improvers or modifiers, such as VI improver-dispersant additives. The nitrogen containing grafted degraded ethylene copolymers are grafted with an ethylenically unsaturated carboxylic acid grafting material and the grafted degraded ethylene copolymers are then reacted with at least one polyamine containing one primary amine group and at least one or more secondary amine groups.
Claims61
Composition of matter 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 having a number average molecular weight of at least 700 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 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 M.sub.w /M.sub.n of less than 2 and a ratio of M.sub.z /M.sub.w of less than 1.8, and wherein at least two portions of an individual intramolecularly heterogeneous chain, each portion comprising at least 5 weight percent of said chain, differ in composition from one another by at least 7 weight percent ethylene;
- said degraded copolymer grafted with (b) at least one ethylenically monounsaturated carboxylic acid material selected from the group consisting of carboxylic acids having 1 to 2 carboxylic acid groups, anhydride derivatives of said carboxylic acids and ester derivatives of said carboxylic acids to form grated ethylene copolymer;
- and
- (ii) at least on polyamine containing one primary amino group and at least one secondary amino group.
1 more element
Composition of matter comprising reaction product of:
- (i) (a) mechanical 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 having a number average molecular weight of at least 700 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 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 M.sub.w /M.sub.n of less than 2 and a ratio of M.sub.z /M.sub.w of less than 1.8, and wherein at least two portions of an individual intramolecularly heterogeneous chain, each portion comprising at least 5 weight percent of said chain, differ in composition from one another by at least 7 weight percent ethylene, and wherein the chain segment sequences is characterized by the structure
- T'--(M--T.sup.2).sub.x;
- said degraded copolymer grafted with (b) at least one C.sub.4 to C.sub.10 ethylenically monounsaturated dicarboxylic acid material selected from the group consisting of carboxylic acids, anhydride derivatives of said carboxylic acids and ester derivatives of said carboxylic acids to form grafted ethylene copolymer;
- and
- (ii) at least one polyamine containing one primary amino group and at least one secondary amino group represented by the formula
- H.sub.2 N(R.sup.1 --NH).sub.z (R.sup.2 --A).sub.y R.sup.3
- wherein:
- R.sup.1 is hydrocarbylene containing from 1 to about 6 carbons;
- R.sup.2 is hydrocarbylene containing from 1 to about 6 carbons;
- R.sup.3 is hydrocarbyl containing from 1 to about 40 carbons;
- A is oxygen;
- y is one;
- and
- z has a value of from 1 to 6.
11 more elements
The composition of matter according to claim 39 wherein said shear assisted oxidative degradation is carried out in the presence of catalysts.
Dependencies are inferred from the claim text.