Patent US3975460A successfully refreshed from Google Patents.
US3975460A
Expired / Lapsed
US
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Blends of certain hydrogenated block copolymers with ABS polymers
Assignee: Shell USA Inc
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Filing: 1975-04-24
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Granted: 1976-08-17
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Expires: 1995-04-24
Abstract
Abstract Polymeric blends having improved processability and high tensile strength comprise a combination of certain selectively hydrogenated block copolymers and ABS polymers.
Inventors
- 👤 Sol Davison
- 👤 Michael Wales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; C08L55/00; C08L55/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A composition comprising a. 100 parts by weight of a block copolymer having at least two polymer blocks A and at least one polymer block B, each polymer block A being selected from the group consisting of monoalkenyl arene polymers and hydrogenated products thereof wherein no more than about 25% of the aromatic double bonds having been reduced, and polymer block B being a hydrogenated polymer block of a C 4-5 conjugated diene wherein at least about 80% of the aliphatic unsaturation of the block has been reduced by hydrogenation; and b. 5-90 parts by weight of an interpolymer of % by Weight
Diene rubber 5-60
Acrylonitrile 5-50
Alkenyl aromatic monomer
25-85.
Claim 2
Dependent Claim
112 words
A composition comprising a. 100 parts by weight of a block copolymer having at least two polymer blocks A and at least one polymer block B, each polymer block A being selected from the group consisting of monoalkenyl arene polymers and hydrogenated products thereof wherein no more than about 25% of the aromatic double bonds having been reduced, and polymer block B being a hydrogenated polymer block of a C 4-5 conjugated diene wherein at least about 80% of the aliphatic unsaturation of the block has been reduced by hydrogenation; and b. 5-90 parts by weight of an interpolymer of % by Weight
Diene rubber 5-60
Acrylonitrile 5-50
Alkenyl aromatic monomer
25-85.
Claim 3
Dependent Claim
17 words
A composition according to claim 1 wherein, prior to hydrogenation, the block copolymer has a structure polystyrene-polybutadiene-polystyrene.
Claim 4
Dependent Claim
21 words
A composition according to claim 1 wherein the interpolymer comprises % by Weight
Polybutadiene 10-35
Acrylonitrile 7.5-35
Styrene 30 14 70.
Claim 5
Dependent Claim
16 words
A composition according to claim 1 wherein the composition comprises 10-75 parts by weight of interpolymer.
Claim 6
Dependent Claim
22 words
A composition according to claim 1 wherein the diene rubber component of the interpolymer is a block copolymer of styrene and butadiene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |