Patent US4286077A successfully refreshed from Google Patents.
US4286077A
Expired / Lapsed
US
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Weather resistant adhesive composition
Assignee: Shell USA Inc
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Filing: 1980-04-21
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Granted: 1981-08-25
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Expires: 2000-04-21
Abstract
Abstract A weather resistant adhesive composition possessing an excellent balance of properties including good tack and low melt viscosity comprises a selectively hydrogenated monoalkenyl arene/conjugated diene block copolymer component having certain block molecular weights, tackifying resin, and plasticizer.
Inventors
- 👤 David J. St. Clair
- 👤 Earle E. Ewins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:02
CPC Classifications
C; C09; C09J; C09J153/00; C09J153/02; C09J153/025; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
166 words
A weather resistant pressure sensitive adhesive composition possessing excellent oxidative and UV stability along with improved tack and reduced melt viscosity comprising: (a) 100 parts by weight of a selectively hydrogenated block copolymer component comprising an A'B' block copolymer and a multiblock copolymer having at least two end blocks A and at least one mid block B wherein the A' and A blocks are monoalkenyl arene polymer blocks and the B' and B blocks are substantially completely hydrogenated conjugated diene polymer blocks, the number average molecular weight of the A' and A blocks are between about 3,000 and about 7,000, the monoalkenyl arene content of the multiblock copolymer is between about 7% and about 22% by weight and the weight ratio between the A'B' block copolymer and the multiblock copolymer is about 0:100 to about 75:25; (b) about 50 to about 350 parts by weight of a tackifying resin compatible with block B; and (c) about 0 to about 100 parts by weight of a plasticizer.
Claim 2
Dependent Claim
166 words
A weather resistant pressure sensitive adhesive composition possessing excellent oxidative and UV stability along with improved tack and reduced melt viscosity comprising: (a) 100 parts by weight of a selectively hydrogenated block copolymer component comprising an A'B' block copolymer and a multiblock copolymer having at least two end blocks A and at least one mid block B wherein the A' and A blocks are monoalkenyl arene polymer blocks and the B' and B blocks are substantially completely hydrogenated conjugated diene polymer blocks, the number average molecular weight of the A' and A blocks are between about 3,000 and about 7,000, the monoalkenyl arene content of the multiblock copolymer is between about 7% and about 22% by weight and the weight ratio between the A'B' block copolymer and the multiblock copolymer is about 0:100 to about 75:25; (b) about 50 to about 350 parts by weight of a tackifying resin compatible with block B; and (c) about 0 to about 100 parts by weight of a plasticizer.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 wherein the weight ratio between the A'B' block copolymer and the multiblock copolymer is between about 20:80 to about 60:40.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 wherein said monoalkenyl arene is styrene and said conjugated diene is butadiene.
Claim 5
Dependent Claim
18 words
A composition according to claim 1 wherein said multiblock copolymer is a selectively hydrogenated linear polystyrene-polybutadiene-polystyrene block copolymer.
Claim 6
Dependent Claim
18 words
A composition according to claim 4 wherein said A'B' block copolymer is a selectively hydrogenated polystyrene-polybutadiene block copolymer.
Claim 7
Dependent Claim
18 words
A composition according to claim 4 wherein said A'B' block copolymer is a selectively hydrogenated polystyrene-polyisoprene block copolymer.
Claim 8
Dependent Claim
17 words
A composition according to claim 1 wherein said multiblock copolymer is a selectively hydrogenated polystyrene-polyisoprene-polystyrene block copolymer.
Claim 9
Dependent Claim
22 words
A composition according to claim 3 wherein said butadiene block has a 1,2 configuration of between about 35 and 65 mol percent.
Claim 10
Dependent Claim
14 words
A composition according to claim 1 wherein said tackifying resin is a saturated resin.
Claim 11
Dependent Claim
15 words
A composition according to claim 9 wherein said tackifying resin is a hydrogenated dicyclopentadiene resin.
Claim 12
Dependent Claim
16 words
A composition according to claim 9 wherein said tackifying resin is a hydrogenated aromatic hydrocarbon resin.
Claim 13
Dependent Claim
20 words
A composition according to claim 1 including between 0 and 200 parts by weight of an A block compatible resin.
Claim 14
Dependent Claim
28 words
A composition according to claim 1 wherein no more than about 25 percent of the alkenyl arene aromatic double bonds in said A and A' blocks are hydrogenated.
References Cited (Backward Citations)
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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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |