EP0129414A2
Expired / Lapsed
EP
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Narrow MWD alpha-olefin copolymers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1984-06-14
•
Granted: —
•
Expires: 2004-06-14
Abstract
Abstract Novel copolymers of alpha-olefins have narrow MWD and comprise intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.
Inventors
- 👤 Charles Cozewith
- 👤 Shiaw Ju
- 👤 Gary William Verstrate
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 10:21
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/02; C08F210/16; C08F210/18; C08F297/00; C08F297/06; C08F297/08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/16; C10; C10M; C10M143/00; C10M143/02; C10M171/00; C10M171/04; B; B01; B01J; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00099; B01J2219/00159; B01J2219/00186; C08L2314/00; C08L2314/02; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/08; C10M2205/10; C10N; C10N2020/00; C10N2020/01; Y; Y10; Y10S; Y10S526/00; Y10S526/916; Y10S526/922
Claims Analysis
Total Claims: 117
Claim 1
Independent Claim
126 words
Copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer having an average ethylene composition and comprising intramolecularly heterogeneous copolymer chains wherein at least two portions of an individual intramolecularly heterogeneous chain, each pcr- tion comprising at least 5 weight percent of said chain, differ in composition from one another by at least 5 weight percent ethylene, wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 15 weight percent or less different from said average ethylene composition, and wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than 2 and a ratio of M z/ M w of less than 1.8.
Claim 2
Dependent Claim
126 words
Copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer having an average ethylene composition and comprising intramolecularly heterogeneous copolymer chains wherein at least two portions of an individual intramolecularly heterogeneous chain, each pcr- tion comprising at least 5 weight percent of said chain, differ in composition from one another by at least 5 weight percent ethylene, wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 15 weight percent or less different from said average ethylene composition, and wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than 2 and a ratio of M z/ M w of less than 1.8.
Claim 3
Dependent Claim
36 words
A copolymer according to Claim 1, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 4
Dependent Claim
36 words
A copolymer according to Claim 1, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition.
Claim 5
Dependent Claim
29 words
A copolymer according to Claim 1, wherein said at least two portions of an individual chain differ in composition from one another by at least 10 weight percent ethylene.
Claim 6
Dependent Claim
29 words
A copolymer according to Claim 1, wherein said at least two portions of an individual chain differ in composition from one another by at least 20 weight percent ethylene.
Claim 7
Dependent Claim
29 words
A copolymer according to Claim 1, wherein said at least two portions of an individual chain differ in composition from one another by at least 40 weight percent ethylene.
Claim 8
Dependent Claim
43 words
A copolymer according to Claim 1, which has a M WD characterized by at least one of a ratio of M w / M n of less than about 1.6 and a ratio of M z/ M w of less than about 1.5.
Claim 9
Dependent Claim
40 words
A copolymer according to Claim 1, which has a MWD characterized by both a ratio of M w / M n of less than about 1.6 and a ratio of M z / M w of less than about 1.5.
Claim 10
Dependent Claim
43 words
A copolymer according to Claim 1, which has a MWD characterized by at least one of a ratio of M w / M n of less than about 1.4 and a ratio of M z / M w of less than about 1.3.
Claim 11
Dependent Claim
40 words
A copolymer according to Claim 1, which has a MWD characterized by both of a ratio of M w / M n of less than about 1.4 and a ratio of M z /M w of less than about 1.3.
Claim 12
Dependent Claim
62 words
A copolymer according to Claim 7 or 8, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition, and wherein said at least two portions of an individual chain differ in composition from one another by at least 10 weight percent ethylene.
Claim 13
Dependent Claim
62 words
A copolymer according to Claim 9 or 10, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition, and wherein said at least two portions of an individual chain differ in composition from one another by at least 20 weight percent ethylene.
Claim 14
Dependent Claim
29 words
A copolymer according to Claim 11, wherein said at least two portions of an individual chain differ in composition from one another by at least 40 weight percent ethylene.
Claim 15
Dependent Claim
29 words
A copolymer according to Claim 12, wherein said at least two portions of an individual chain differ in composition from one another by at least 40 weight percent ethylene.
Claim 16
Dependent Claim
19 words
A copolymer according to Claim 1, having a total maximum ethylene content of about 90% on a weight basis.
Claim 17
Dependent Claim
19 words
A copolymer according to Claim 1, having a total maximum ethylene content of abcut 85% on a weight basis.
Claim 18
Dependent Claim
38 words
A copolymer according to Claim 15 or 16, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 19
Dependent Claim
38 words
A copolymer according to Claim 15 or 16, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition.
Claim 20
Dependent Claim
31 words
A copolymer according to Claim 15 or 16, wherein said at least two portions of an individual chain differ in composition from one another by at least 10 weight percent ethylene.
Claim 21
Dependent Claim
31 words
A copolymer according to Claim 15 or 16, wherein said at least two portions of an individual chain differ in composition from one another by at least 20 weight percent ethylene.
Claim 22
Dependent Claim
31 words
A copolymer according to Claim 15 or 16, wherein said at least two portions of an individual chain differ in composition from one another by at least 40 weight percent ethylene.
Claim 23
Dependent Claim
44 words
A copolymer according to Claim 15 or 16, which has a MWD characterized by at least one of a ratio of M w / M n of less than about 1.6 and a ratio of M z/ M w of less than about 1.5.
Claim 24
Dependent Claim
42 words
A copolymer according to Claim 15 or 16, which has a MWD characterized by both a ratio of M w / M n of less than about 1.6 and a ratio of M z / M w of less than about 1.5.
Claim 25
Dependent Claim
45 words
A copolymer according to Claim 15 or 16, which has a M WD characterized by at least one of a ratio of M w/ M n of less than about 1.4 and a ratio of M z / M w of less than about 1.3.
Claim 26
Dependent Claim
38 words
A copolymer according to Claim 15 or 16, which has a MWD characterized by both of a ratio of Mw/Mn of less than about 1.4 and a ratio of M z/ M w of less than about 1.3.
Claim 27
Dependent Claim
60 words
A copolymer according to Claim 22, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition, and wherein said at least two portions of an individual chain differ in composition from one another by at least 10 weight percent ethylene.
Claim 28
Dependent Claim
60 words
A copolymer according to Claim 24, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition, and wherein said at least two portions of an individual chain differ in composition from one another by at least 20 weight percent ethylene.
Claim 29
Dependent Claim
28 words
A copolymer according to Claim-26, wherein said at least two portions of an individual chain differ in composition from one another by at least 40 weight percent ethylene.
Claim 30
Dependent Claim
29 words
A copolymer according to Claim 27, wherein said at least two portions of an individual chain differ in composition from one another by at least 40 weight percent ethylene.
Claim 31
Dependent Claim
24 words
A copolymer according to Claim 1, 15 or 16, having a total ethylene content of greater than about 25 % on a weight basis.
Claim 32
Dependent Claim
12 words
A copolymer according to Claim 1, 15 or 16, further comprising diene.
Claim 33
Dependent Claim
9 words
A copolymer according to Claim 26, further comprising diene.
Claim 34
Dependent Claim
20 words
A copolymer according to Claim 32., wherein the total ethylene content is about 30% to 75% on a weight basis.
Claim 35
Dependent Claim
14 words
A copolymer according to Claim 11 which is comprised of ethylene, propylene and ENB.
Claim 36
Dependent Claim
9 words
A copolymer according to Claim 1 which is cured.
Claim 37
Dependent Claim
9 words
A copolymer according to Claim 11 which is cured.
Claim 38
Dependent Claim
18 words
A copolymer according to Claim 1, which has a weight average molecular weight of about 2,000 to 12,000,000.
Claim 39
Dependent Claim
18 words
A copolymer according to Claim 1, which has a weight average molecular weight of about 10,000 to 1,000,000.
Claim 40
Dependent Claim
18 words
A copolymer according to Claim 1, which has a weight average molecular weight of about 20,000 to 750,000.
Claim 41
Dependent Claim
91 words
In a polymerization process for producing copolymer in the. form of copolymer chains, from a reaction mixture comprised of catalyst, ethylene, and at least one other alpha-olefin monomer, the improvement which comprises conducting the polymerization: (a) in at least one mix-free reactor, (b) with essentially one active catalyst species, (c) using at least one reaction mixture which is essentially transfer agent-free, and (d) in such a manner and under conditions sufficient to initiate propagation of essentially all copolymer chains simultaneously, wherein the copolymer chains produced are dispersed with the reaction mixture.
Claim 42
Dependent Claim
91 words
In a polymerization process for producing copolymer in the. form of copolymer chains, from a reaction mixture comprised of catalyst, ethylene, and at least one other alpha-olefin monomer, the improvement which comprises conducting the polymerization: (a) in at least one mix-free reactor, (b) with essentially one active catalyst species, (c) using at least one reaction mixture which is essentially transfer agent-free, and (d) in such a manner and under conditions sufficient to initiate propagation of essentially all copolymer chains simultaneously, wherein the copolymer chains produced are dispersed with the reaction mixture.
Claim 43
Dependent Claim
38 words
A process according to Claim 40, wherein the catalyst comprises hydrocarbon-soluble vanadium compound and organo-aluminum compound which react to form essentially one active catalyst species, at least one of the vanadium compound and organo-aluminum compound containing:a valence-bonded halogen.
Claim 44
Dependent Claim
23 words
4 2. A process according to Claim 40 or 41, wherein the inlet temperature of the reaction mixture is about -50°C to 150°C.
Claim 45
Dependent Claim
22 words
4 3. A process according to Claim 42, wherein the maximum outlet temperature of the reaction mixture is about 200 0 C.
Claim 46
Dependent Claim
20 words
A process according to Claim 43, wherein the catalyst components are premixed, and wherein the polymerization is a solution polymerization.
Claim 47
Dependent Claim
18 words
A process according to Claim 44, wherein the catalyst components are aged for at least about .5 seconds.
Claim 48
Dependent Claim
22 words
A process according to Claim 41, wherein the mole ratio of aluminum to vanadium in the catalyst is about 2 to 25.
Claim 49
Dependent Claim
32 words
A process according to Claim 44, wherein the reaction mixture leaving the reactor has a copolymer concentration of about 3 to 15% on a weight of copolymer per weight of solvent basis.
Claim 50
Dependent Claim
13 words
A process according to Claim 40, wherein the catalyst comprises a Ziegler catalyst.
Claim 51
Dependent Claim
18 words
A process according to Claim 42, wherein the maximum outlet temperature of the reaction mixture is. about 50°C.
Claim 52
Dependent Claim
23 words
A process according to Claim 47, wherein the catalyst comprises components that are premixed and then aged for about 1 to 50 seconds.
Claim 53
Dependent Claim
22 words
A process according to Claim 47, wherein the mole ratio of aluminum to vanadium in the catalyst is about 4 to 15.
Claim 54
Dependent Claim
45 words
A process according to Claim 51, wherein the polymerization is conducted in a solvent for the reaction mixture, and wherein the reaction mixture leaving the reactor has a copolymer concentration of about 3% to 10% on a weight of polymer per weight of solvent basis.
Claim 55
Dependent Claim
89 words
A process according to Claim 41, wherein the catalyst comprises: (a) hydrocarbon-soluble vanadium compound selected from the group consisting of: where x= 0 -3 and R=hydrocarbon radical; VC14; VO(AcAc) 2 , where AcAc=acetyl acetonate V (AcAc)3, where AcAc=acetyl acetonate VOCl x (AcAc) 3-x , where x=l or 2 and AcAc=acetyl acetonate; and VCl 3 -nB, where n=2-3 and B= L ewis base capable of forming hydrocarbon-soluble complexes with VC1 3 ; and (b) organo-aluminum compound selected from the group consisting of: and where R and R' are hydrocarbon radicals
Claim 56
Dependent Claim
20 words
A process according to Claim 41, wherein the catalyst comprises VC1 4 and Al 2 R 3 Cl 3 .
Claim 57
Dependent Claim
18 words
A process according to Claim 43, wherein the maximum outlet temperature of the reaction mixture is about 70°C.
Claim 58
Dependent Claim
11 words
A process according to Claim 55, wherein the polymerization is adiabatic.
Claim 59
Dependent Claim
24 words
A process according to Claim 56, wherein the catalyst comprises one active species which provides for at least 65% of the total copolymer produced.
Claim 60
Dependent Claim
15 words
A process according to Claim 57, which is continuous and is conducted in hexane solvent.
Claim 61
Dependent Claim
12 words
A process according to Claim 40, wherein said copolymer product is cured.
Claim 62
Dependent Claim
17 words
A process according to Claim 40, wherein said polymerization is conducted in at least one tubular reactor.
Claim 63
Dependent Claim
36 words
A process according to Claim 60, wherein said reaction mixture further comprises diene, and wherein at least one of said ethylene, other alpha-olefin monomer and diene are fed to said tubular reactor at multiple feed sites.
Claim 64
Dependent Claim
16 words
A process according to Claim 40, wherein said copolymer product is blended with basestock lubricating oil.
Claim 65
Dependent Claim
27 words
A process according to Claim 62, wherein said copolymer product is blended with the basestock lubricating oil in an amount of from about .001 to 49 wt.%.
Claim 66
Dependent Claim
27 words
A process according to Claim 40, wherein said copolymer product is blended with hydrocarbon mineral oil diluent in an amount of from about 5 to 50 wt.%.
Claim 67
Dependent Claim
68 words
A lubricating oil composition comprising a major amount of basestock lubricating oil, of lubricating viscosity, containing an effective amount of a viscosity index improver_ being a copolymer of ethylene and at least one other alpha-olefin monomer, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than 2 and a ratio of Mz/Mw of less than 1.8.
Claim 68
Dependent Claim
68 words
A lubricating oil composition comprising a major amount of basestock lubricating oil, of lubricating viscosity, containing an effective amount of a viscosity index improver_ being a copolymer of ethylene and at least one other alpha-olefin monomer, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than 2 and a ratio of Mz/Mw of less than 1.8.
Claim 69
Dependent Claim
24 words
A lubricating oil composition according to Claim 65, wherein said copolymer has a total maximum ethylene content of about 90% on a weight basis.
Claim 70
Dependent Claim
49 words
A lubricating oil composition according to Claim 65 or 66, wherein said copolymer has a MWD characterized by at least one of a ratio of M w / M n of less than about 1.6 and a ratio of M z / M w of less than about 1.5.
Claim 71
Dependent Claim
47 words
A lubricating oil composition according to Claim 65 or 56, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than about 1.4 and a ratio of M z/ M w of less than about 1.3.
Claim 72
Dependent Claim
52 words
A lubricating oil composition according to Claim 65 or 66, wherein said copolymer comprises intramolecularly heterogeneous chains 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 5 weight percent ethylene.
Claim 73
Dependent Claim
44 words
A lubricating oil composition according to Claim 65 or 66, wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 15 weight percent or less different from the average ethylene composition of said copolymer.
Claim 74
Dependent Claim
21 words
A lubricating oil composition according to Claim 69, wherein said portions differ in composition by at least 10 weight percent ethylene.
Claim 75
Dependent Claim
38 words
A lubricating oil composition according to Claim 70, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 76
Dependent Claim
18 words
A lubricating oil composition according to Claim 65, containing from about .001 to 49 wt.% of said copolymer.
Claim 77
Dependent Claim
22 words
A lubricating oil composition accordino to Claim 65, wherein said copolymer has a weight average molecular weight of about 5,000 to 500,000.
Claim 78
Dependent Claim
76 words
A lubricating oil composition according to Claim 71, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than about 1.6 and a ratio of M z / M w of less than about 1.5, and wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 79
Dependent Claim
35 words
A lubricating oil composition according to Claim 75, wherein said intermolecular compositional dispersity is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition.
Claim 80
Dependent Claim
77 words
A lubricating oil composition according to Claim 71, wherein said copolymer has a MWD characterized by at least one of a ratio of M w / M n of less than about 1.4 and a ratio of M z / M w of less than about 1.3., and wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 81
Dependent Claim
35 words
A lubricating oil composition according to Claim 77, wherein said intermolecular compositional dispersity is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition.
Claim 82
Dependent Claim
19 words
A lubricating oil composition according to Claim 74, wherein said weight average molecular weight is about 15,000 to 300,000.
Claim 83
Dependent Claim
19 words
A lubricating oil composition according to Claim 74, wherein said weight average molecular weight is about 50,000 to 250,000.
Claim 84
Dependent Claim
15 words
A lubricating oil composition according to Claim 65, wherein said copolymer comprises ethylene and propylene.
Claim 85
Dependent Claim
14 words
A lubricating oil composition according to Claim 81, wherein said copolymer further comprises diene.
Claim 86
Dependent Claim
13 words
A lubricating oil composition according to Claim 82, wherein said diene is ENB.
Claim 87
Dependent Claim
15 words
A lubricating oil composition according to Claim 65, having an MRV of less than 30,000.
Claim 88
Dependent Claim
15 words
A lubricating oil composition according to Claim 65, having an MRV of less than 20,000.
Claim 89
Dependent Claim
15 words
A lubricating oil composition according to Claim 65, having an MRV of less than 10,000.
Claim 90
Dependent Claim
74 words
An oil additive concentrate composition comprising hydrocarbon mineral oil diluent and about 5 to 50 wt.% based on the total amount of hydrocarbon mineral oil diluent of a copolymer of ethylene and at least one other alpha-olefin monomer, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than 2 and a ratio of M z / M w of less than 1.8.
Claim 91
Dependent Claim
74 words
An oil additive concentrate composition comprising hydrocarbon mineral oil diluent and about 5 to 50 wt.% based on the total amount of hydrocarbon mineral oil diluent of a copolymer of ethylene and at least one other alpha-olefin monomer, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than 2 and a ratio of M z / M w of less than 1.8.
Claim 92
Dependent Claim
52 words
88 . An oil additive concentrate composition according to Claim 87, wherein said copolymer comprises intramolecularly heterogeneous chains 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 5 weight percent ethylene.
Claim 93
Dependent Claim
45 words
An oil additive concentrate composition according to Claim 87 or 88, wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 15 weight percent or less different from the average ethylene composition of said copolymer.
Claim 94
Dependent Claim
22 words
An oil additive concentrate composition according to Claim 88, wherein said portions differ in composition by at least 10 weight percent ethylene.
Claim 95
Dependent Claim
39 words
An oil additive concentrate composition according to Claim 89, wherein said intermolecular compositional dispersity of said copolymer is such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 96
Dependent Claim
23 words
An oil additive concentrate composition according to Claim 91, wherein said copolymer has a weight average molecular weight of about 5,000 to 500,000.
Claim 97
Dependent Claim
20 words
An oil additive concentrate composition according to Claim 92, wherein said weight average molecular weight is about 15,000 to 300,000.
Claim 98
Dependent Claim
20 words
An oil additive concentrate composition according to Claim 93, wherein said weight average molecular weight is about 50,000 to 250,000.
Claim 99
Dependent Claim
16 words
-An oil additive concentrate composition according to Claim 94, wherein said copolymer comprises ethylene and propylene.
Claim 100
Dependent Claim
25 words
An oil additive concentrate composition according to Claim 87, wherein said copolymer has a total maximum ethylene content of about 90% on a weight basis.
Claim 101
Dependent Claim
49 words
An oil additive concentrate composition according to Claim 87 or 96, wherein said copolymer has a M WD characterized by at least one of a ratio of M w/ M n of less than about 1.6 and a ratio of M z/ M w of less than about 1.5.
Claim 102
Dependent Claim
49 words
An oil additive concentrate composition according to Claim 87 or 96, wherein said copolymer has a MWD characterized by at least one of a ratio of M w/ M n of less than about 1.4 and a ratio of M z / M w of less than about 1.3.
Claim 103
Dependent Claim
22 words
An oil additive concentrate composition according to Claim 88, wherein said portions differ in composition by at least 10 weight percent ethylene.
Claim 104
Dependent Claim
77 words
An oil additive concentrate composition according to Claim 88, wherein said copolymer has a MWD characterized by at least one of a ratio of M w / M n of less than about 1.6 and a ratio of M z / M w of less than about 1.5, and.wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 105
Dependent Claim
36 words
An oil additive concentrate composition according to Claim 100, wherein said intermolecular compositional dispersity is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition.
Claim 106
Dependent Claim
81 words
102 . An oil additive concentrate composition according to Claim 88, wherein said copolymer has a M WD characterized by at least one of a ratio of M w / M n of less than about 1.4 and a ratio of M z / M w of less than about 1.3, and wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 13% or less different from said average ethylene composition.
Claim 107
Dependent Claim
36 words
An oil additive concentrate composition according to Claim 102, wherein said intermolecular compositional dispersity is such that 95 weight percent of said copolymer chains have a composition 10% or less different from said average ethylene composition.
Claim 108
Dependent Claim
52 words
A lubricating oil composition comprising a major amount of basestock lubricating oil of lubricating viscosity containing an effective amount of a viscosity index improver being a copolymer of ethylene and at least one other alpha-olefin monomer produced in a mix-free reactor and blended in an effective amount with the basestock lubricating oil.
Claim 109
Dependent Claim
52 words
A lubricating oil composition comprising a major amount of basestock lubricating oil of lubricating viscosity containing an effective amount of a viscosity index improver being a copolymer of ethylene and at least one other alpha-olefin monomer produced in a mix-free reactor and blended in an effective amount with the basestock lubricating oil.
Claim 110
Dependent Claim
25 words
A lubricating oil composition according to Claim 104, wherein the basestock lubricating oil is mineral oil and the copolymer comprises copolymer of ethylene and propylene.
Claim 111
Dependent Claim
43 words
An oil additive concentrate composition ' comprising copolymer of ethylene and at least one other alpha-olefin produced in a mix-free reactor and blended with hydrocarbon mineral oil diluent in an amount of about 5 to 50 wt.% based on hydrocarbon mineral oil diluent.
Claim 112
Dependent Claim
43 words
An oil additive concentrate composition ' comprising copolymer of ethylene and at least one other alpha-olefin produced in a mix-free reactor and blended with hydrocarbon mineral oil diluent in an amount of about 5 to 50 wt.% based on hydrocarbon mineral oil diluent.
Claim 113
Dependent Claim
18 words
An oil additive concentrate composition according to Claim 106, wherein the copolymer comprises copolymer of ethylene and propylene.
Claim 114
Dependent Claim
54 words
The use of a copolymer of ethylene and at least one other alpha-olefin monomer, which copolymer has a MWD characterised by a ratio of M w/ M n of less than 2 and/or a ratio of M z / M w of less than 1.8, as a viscosity index improver for lubricating oil compositions.
Claim 115
Dependent Claim
54 words
The use of a copolymer of ethylene and at least one other alpha-olefin monomer, which copolymer has a MWD characterised by a ratio of M w/ M n of less than 2 and/or a ratio of M z / M w of less than 1.8, as a viscosity index improver for lubricating oil compositions.
Claim 116
Dependent Claim
87 words
The use according to Claim 108 wherein the copolymer has an average ethylene composition and comprises intramolecularly heterogeneous copolymer chains 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 5 weight percent ethylene, and/or wherein said copolymer has an intermolecular compositional dispersity such that 95 weight percent of said copolymer chains have a composition 15 weight percent or less different from said average ethylene composition.
Claim 117
Dependent Claim
43 words
The use according to Claim 108 or 109 wherein the lubricating oil composition additionally includes one or more additives selected from other viscosity index improvers or modifiers, dispersants, metal detergent additives, antiwear additives, oxidation inhibitors, rust inhibitors, antifoam agents and pour point depressants.
References Cited (Backward Citations)
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