US4551501A
Expired / Lapsed
US
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Crystalline propylene polymer composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1984-12-27
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Granted: 1985-11-05
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Expires: 2004-12-27
Abstract
Abstract A crystalline propylene polymer composition having excellent transparency and rigidity comprising a blend of a crystalline polypropylene with a polymer of a vinyl cycloalkane having at least 6 carbon atoms. The composition contains 0.05 weight ppm to 10,000 weight ppm of the vinyl cycloalkane unit.
Inventors
- 👤 Akinobu Shiga
- 👤 Masahiro Kakugo
- 👤 Junpei Kojima
- 👤 Kizuku Wakatsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:06
CPC Classifications
C; C08; C08L; C08L53/00; C08F; C08F297/00; C08F297/06; C08F297/08; C08F297/083; C08L23/00; C08L23/02; C08L23/10; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
40 words
A crystalline propylene polymer composition comprising a blend of a crystalline polypropylene with a polymer of a vinyl cycloalkane having at least 6 carbon atoms, said composition containing 0.05 weight ppm to 10,000 weight ppm of the vinyl cycloalkane unit.
Claim 2
Dependent Claim
40 words
A crystalline propylene polymer composition comprising a blend of a crystalline polypropylene with a polymer of a vinyl cycloalkane having at least 6 carbon atoms, said composition containing 0.05 weight ppm to 10,000 weight ppm of the vinyl cycloalkane unit.
Claim 3
Dependent Claim
14 words
A composition of claim 1, wherein said crystalline polypropylene is a homopolymer of propylene.
Claim 4
Dependent Claim
24 words
A composition of claim 1, wherein said crystalline polypropylene is a random copolymer of propylene with another α-olefin having 2 to 18 carbon atoms.
Claim 5
Dependent Claim
24 words
A composition of claim 1, wherein said crystalline polypropylene is a block copolymer of propylene with another α-olefin having 2 to 18 carbon atoms.
Claim 6
Dependent Claim
24 words
A composition of claim 1, wherein said polymer of vinyl cycloalkane is a homopolymer of a vinyl cycloalkane having at least 6 carbon atoms.
Claim 7
Dependent Claim
28 words
A composition of claim 1, wherein said polymer of vinyl cycloalkane is a block copolymer of a vinyl cycloalkane having at least 6 carbon atoms with an α-olefin.
Claim 8
Dependent Claim
10 words
A composition of claim 6, wherein said α-olefin is propylene.
Claim 9
Dependent Claim
25 words
A composition of claim 1, wherein said vinyl cycloalkane is vinyl cyclobutane, vinyl cyclopentane, vinyl-3-methyl cyclopentane, vinyl cyclohexane, vinyl-2-methyl cyclohexane, vinyl-3-methyl cyclohexane, or vinyl norbornane.
Claim 10
Dependent Claim
15 words
A composition of claim 8, wherein said vinyl cycloalkane is vinyl cyclopentane or vinyl cyclohexane.
Claim 11
Dependent Claim
21 words
A composition of claim 1, wherein said composition contains 0.5 weight ppm to 5,000 weight ppm of the vinyl cycloalkane unit.
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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |