US4898914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified block copolymers functionalized in the monoalkenyl aromatic or vinylarene block
Assignee: Kraton Polymers US LLC
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Filing: 1988-05-16
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Granted: 1990-02-06
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Expires: 2008-05-16
Abstract
Abstract The present invention relates to a thermally stable modified selectively hydrogenated high 1,2 content block copolymer wherein a functional group is grafted to the block copolymer in the vinylarene block.
Inventors
- 👤 William P. Gergen
- 👤 Robert G. Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:06
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04; C08F8/30; C08L; C08L53/00; C08L53/02; C08L53/025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A functionalized selectively hydrogenated block copolymer of the formula B n (AB) o A p where n=0 or 1, o=1 to 50, p=0 or 1, each A is predominantly a polymerized monoalkenyl aromatic or vinylarene hydrocarbon block and each B prior to hydrogenation is predominantly a polymerized conjugated diene hydrocarbon block, to which has been grafted at least one ethylene oxide molecule, wherein substantially all of the grafted molecules are grafted to the block copolymer in the monoalkenyl aromatic or vinylarene block.
Claim 2
Dependent Claim
82 words
A functionalized selectively hydrogenated block copolymer of the formula B n (AB) o A p where n=0 or 1, o=1 to 50, p=0 or 1, each A is predominantly a polymerized monoalkenyl aromatic or vinylarene hydrocarbon block and each B prior to hydrogenation is predominantly a polymerized conjugated diene hydrocarbon block, to which has been grafted at least one ethylene oxide molecule, wherein substantially all of the grafted molecules are grafted to the block copolymer in the monoalkenyl aromatic or vinylarene block.
Claim 3
Dependent Claim
16 words
The functionalized block copolymer of claim 1 wherein the block copolymer is a styrene-ethylene/butylene-styrene block copolymer.
Claim 4
Dependent Claim
22 words
The block copolymer of claim 1 wherein prior to hydrogenation, the polymeric blocks A are polymer blocks of a monoalkenyl aromatic hydrocarbon.
Claim 5
Dependent Claim
52 words
The block copolymer of claim 1 wherein the blocks A comprise 1-40 percent by weight of the copolymer, the unsaturation of block B is reduced to less than 5% of its original value and the average unsaturation of the hydrogenated block copolymer is reduced to less than 20% of its original value.
Claim 6
Dependent Claim
24 words
The block copolymer of claim 4 wherein A is a polymerized styrene block having an average molecular weight of between about 500 and 60,000.
Claim 7
Dependent Claim
32 words
The block copolymer of claim 1 wherein B is a polymerized butadiene block having an average molecular weight of between about 35,000 and 150,000, 35%-50% of the condensed butadiene units having 1,2-configuration.
Claim 8
Dependent Claim
25 words
The block copolymer of claim 6 wherein the unsaturation of block B has been reduced by hydrogenation to less than 10% of its original value.
Claim 9
Dependent Claim
27 words
A functionalized selectively hydrogenated block copolymer composition according to claim 1 wherein an average of less than about 10% of the monoalkenyl aromatic hydrocarbon units are hydrogenated.
Claim 10
Dependent Claim
26 words
A functionalized hydrogenated block copolymer composition according to claim 1 wherein an average of more than about 25% of the monoalkenyl aromatic hydrocarbon units are hydrogenated.
Claim 11
Dependent Claim
28 words
The functionalized hydrogenated block copolymer of claim 1, wherein the grafted molecule or its derivative is present in said functionalized block copolymer at between about 0.02-20 weight percent.
Claim 12
Dependent Claim
28 words
The functionalized hydrogenated block copolymer of claim 1, wherein the grafted molecule or its derivative is present in said functionalized block copolymer at between about 0.1-10 weight percent.
Claim 13
Dependent Claim
27 words
The functionalized hydrogenated block copolymer of claim 1, wherein the grafted molecule or its derivative is present in said functionalized block copolymer at between 0.2-5 weight percent.
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |