US4076669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous polypropylene in hydrogenated rubbery block copolymers
Assignee: Phillips Petroleum Co
•
Filing: 1976-09-03
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Granted: 1978-02-28
•
Expires: 1996-09-03
Abstract
Abstract Amorphous polypropylene is blended with a hydrogenated thermoplastic elastomer to give a composition having both high tensile strength and high melt flow.
Inventors
- 👤 Bobby R. Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:37
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; Y; Y10; Y10S; Y10S525/00; Y10S525/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
37 words
A composition comprising: a hydrogenated plastomer of a monovinyl-substituted aromatic compound and a conjugated diene; and amorphous polypropylene in an amount within the range of 6-60 parts by weight per 100 parts by weight of said plastomer.
Claim 2
Dependent Claim
37 words
A composition comprising: a hydrogenated plastomer of a monovinyl-substituted aromatic compound and a conjugated diene; and amorphous polypropylene in an amount within the range of 6-60 parts by weight per 100 parts by weight of said plastomer.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 wherein said plastomer is a copolymer of styrene and butadiene.
Claim 4
Dependent Claim
19 words
A composition according to claim 1 wherein said plastomer contains 23 to 33 weight percent block monovinyl-substituted aromatic compound.
Claim 5
Dependent Claim
23 words
A composition according to claim 2 wherein said amorphous polypropylene has a weight average molecular weight within the range of 3,500 to 8,000.
Claim 6
Dependent Claim
17 words
A composition according to claim 4 wherein said amorphous polypropylene soluble fraction from a propylene polymerization process.
Claim 7
Dependent Claim
14 words
A composition according to claim 2 wherein said composition contains in addition a filler.
Claim 8
Dependent Claim
14 words
A composition according to claim 2 wherein said plastomer is a radial block copolymer.
Claim 9
Dependent Claim
40 words
A composition according to claim 2 wherein said plastomer is produced by first charging a randomizing agent, styrene, and n-butyllithium and subjecting the resulting mixture to polymerization conditions, thereafter introducing butadiene, and thereafter introducing an epoxidized soybean oil coupling agent.
Claim 10
Dependent Claim
27 words
A composition according to claim 2 wherein said hydrogenation is carried out utilizing a nickel/triethylaluminum catalyst to give a residual olefinic unsaturation of less than 5 percent.
Claim 11
Dependent Claim
68 words
A composition according to claim 9 wherein said plastomer has a block polystyrene content of 23 to 33 weight percent, said amorphous polypropylene has a weight average molecular weight within the range of 3,500 to 8,000 and is the propylene soluble component of a propylene polymerization process and wherein said plastomer is produced by sequential polymerization of butadiene and styrene with subsequent coupling with a polyfunctional coupling agent.
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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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |