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USH815H
Expired / Lapsed
US
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Lubricant composition containing a viscosity index improver having dispersant properties
Assignee: Carl L. Willis
•
Filing: 1988-02-17
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Granted: 1990-09-04
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Expires: 2008-02-17
Abstract
Abstract The present invention relates to a lubricant composition containing a minor amount of a thermally stable modified selectively hydrogenated alkenyl arene/conjugated diene copolymer wherein a primary or secondary amine functional group is grafted to the block copolymer primarily in the alkenyl arene blocks thereof.
Inventors
- 👤 Carl L. Willis
- 👤 Andy M. Arismendi, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:12
CPC Classifications
C; C10; C10M; C10M149/00; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10M143/00; C10M143/12; C10M2205/00; C10M2205/04; C10M2205/06; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/024; C10M2217/04; C10M2217/06; C10N; C10N2040/00; C10N2040/02; C10N2040/06; C10N2040/08; C10N2040/12; C10N2040/13; C10N2040/135; C10N2040/20; C10N2040/25; C10N2040/251; C10N2040/252; C10N2040/253; C10N2040/255; C10N2040/26; C10N2040/28; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
157 words
A lubricant composition comprising: (a) a major amount of a lubricating oil; and (b) a minor effective viscosity improving amount of an oil soluble, functionalized selectively hydrogenated block copolymer to which has been grafted amine functional groups, said functionalized block copolymer comprising: (1) a base block copolymer which comprises (i) at least one polymer block A, said A block being at least predominantly a polymerized alkenyl arene block, and (ii) at least one selectively hydrogenated polymer block B, said B block prior to hydrogenation being at least predominantly a polymerized conjugated diene block, and (2) wherein substantially all of said amine functional groups are grafted to said base block copolymer on said A blocks, and (3) wherein said amine functional groups are represented by the general formula ##STR12## wherein R 1 and R 2 are the same or different alkyl, cycloaryl or aryl radicals and wherein R 3 is a hydrogen, alkyl, cycloalkyl, aryl or silyl radical.
Claim 2
Dependent Claim
157 words
A lubricant composition comprising: (a) a major amount of a lubricating oil; and (b) a minor effective viscosity improving amount of an oil soluble, functionalized selectively hydrogenated block copolymer to which has been grafted amine functional groups, said functionalized block copolymer comprising: (1) a base block copolymer which comprises (i) at least one polymer block A, said A block being at least predominantly a polymerized alkenyl arene block, and (ii) at least one selectively hydrogenated polymer block B, said B block prior to hydrogenation being at least predominantly a polymerized conjugated diene block, and (2) wherein substantially all of said amine functional groups are grafted to said base block copolymer on said A blocks, and (3) wherein said amine functional groups are represented by the general formula ##STR12## wherein R 1 and R 2 are the same or different alkyl, cycloaryl or aryl radicals and wherein R 3 is a hydrogen, alkyl, cycloalkyl, aryl or silyl radical.
Claim 3
Dependent Claim
29 words
The composition according to claim 1, wherein said minor effective amount is from about 0.01 to about 10 percent by weight based on the total weight of said composition.
Claim 4
Dependent Claim
39 words
The composition according to claim 1, wherein said amine functional groups are present in an amount such that the nitrogen content of said functionalized block copolymer is at least about 0.01 percent by weight on said base block copolymer.
Claim 5
Dependent Claim
31 words
The composition according to claim 3, wherein the nitrogen content of said functionalized block copolymer is from about 0.01 to about 5 percent by weight based on said base block copolymer.
Claim 6
Dependent Claim
69 words
The composition according to claim 1, wherein said copolymer has a structure selected from the group consisting of A--B, B--A--B, (B--A)-- n X, and (B--A)-- y X--(B) z and (B--A)-- y X--(A) z wherein X is a residual group of a polyfunctional coupling agent having two or more functional groups, y and z are, independently integers of 1 to 20 and n is an integer of 2 to 40.
Claim 7
Dependent Claim
13 words
The composition according to claim 1, wherein said composition has a branched structure.
Claim 8
Dependent Claim
13 words
The composition according to claim 1, wherein said composition has a linear structure.
Claim 9
Dependent Claim
137 words
The composition according to claim 2, wherein (a) each of said A blocks prior to hydrogenation is at least predominantly a polymerized monoalkenyl monocyclic arene block having an average molecular weight of about 1,000 to about 125,000, (b) each of said B blocks prior to hydrogenation is at least predominantly a polymerized conjugated diene block having an average molecular weight of about 10,000 to about 450,000, (c) said A blocks constituting about 2 to about 70 percent by weight of said base block copolymer, (d) the residual ethylenic unsaturation of said B block is less than about 10 percent of the ethylenic unsaturation of said B blocks prior to hydrogenation, and (e) the residual aromatic unsaturation of said A blocks is greater than about 90 percent of the aromatic unsaturation of said A block prior to hydrogenation.
Claim 10
Dependent Claim
24 words
The composition according to claim 8, wherein said A blocks constitute about 20 to about 70 percent by weight of said base block copolymer.
Claim 11
Dependent Claim
39 words
The composition according to claim 8, wherein prior to hydrogenation: (a) said A block is polymerized styrene and (b) said B block is selected from the group consisting of polymerized isoprene, polymerized butadiene, and polymerized isoprene and butadiene copolymer.
Claim 12
Dependent Claim
27 words
The composition according to claim 10, wherein said B block is polymerized butadiene block having a 1,2 content of between about 35 percent and about 55 percent.
Claim 13
Dependent Claim
23 words
The composition according to claim 11, wherein said polymerized butadiene block has an average molecular weight of between about 10,000 to about 150,000.
Claim 14
Dependent Claim
30 words
The composition according to claim 12, wherein the residual ethylenic unsaturation of said polymerized butadiene block is less than about 5 percent of the ethylenic unsaturation present prior to hydrogenation.
Claim 15
Dependent Claim
29 words
The composition according to claim 13, wherein the residual ethylenic unsaturation of said polymerized butadiene block is at most 2 percent of the ethylenic unsaturation present prior to hydrogenation.
Claim 16
Dependent Claim
23 words
The composition according to claim 14, wherein said polymerized styrene block has an average molecular weight of between about 1,000 and about 60,000.
Claim 17
Dependent Claim
19 words
The composition according to claim 15, wherein prior to functionalization said base block copolymer is a polystyrene-poly(ethylene/butylene) diblock copolymer.
Claim 18
Dependent Claim
19 words
The composition according to claim 15, wherein prior to functionalization said base block copolymer is a polystyrene-poly(ethylene/butylene)-polystyrene block copolymer.
Claim 19
Dependent Claim
15 words
The composition according to claim 10, wherein said B block is a polymerized isoprene block.
Claim 20
Dependent Claim
23 words
The composition according to claim 18, wherein said polymerized isoprene block has an average molecular weight of between about 10,000 to about 150,000.
Claim 21
Dependent Claim
30 words
The composition according to claim 19, wherein the residual ethylenic unsaturation of said polymerized isoprene block is less than about 5 percent of the ethylenic unsaturation present prior to hydrogenation.
Claim 22
Dependent Claim
30 words
The composition according to claim 20, wherein the residual ethylenic unsaturation of said polymerized isoprene block is at most about 2 percent of the ethylenic unsaturation present prior to hydrogenation.
Claim 23
Dependent Claim
21 words
The functionalities block copolymer according to claim 21, wherein prior to functionalization said base block copolymer is a polystyrene-poly(ethylene/propylene) diblock copolymer.
Claim 24
Dependent Claim
19 words
The composition according to claim 21, wherein prior to functionalization said base block copolymer is a polystyrene-poly(ethylene/propylene)-polystyrene block copolymer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |