US3865903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealable isotactic polypropylene and 1,3 pentadiene polymer
Assignee: Mobil Oil AS
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Filing: 1973-04-16
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Granted: 1975-02-11
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Expires: 1993-04-16
Abstract
Abstract A resinous blend composition, and thermoplastic film structures fabricated therefrom having improved physical properties, comprising a polyolefin (e.g., polypropylene) containing a minor amount based on the weight of the polyolefin and sufficient to improve the heat sealing characteristics of films fabricated from such blends, of a normally solid, resinous, random multipolymer of a mixture comprising pentadiene, 1,3 and at least one other hydrocarbon compound containing ethylenic unsaturation copolymerizable therewith. Examples of such ethylenically unsaturated hydrocarbons include cyclopentadiene, isoprene, 2methylbutene-2, tertiary butylstyrene, Beta -pinene, dipentene, Beta -phellandrene, Alpha -methylstyrene, and mixtures thereof.
Inventors
- 👤 Michael A Nahmias
- 👤 Edward M Bullard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:55
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/045; C08L23/14; C08L23/142; C08L57/00; C08L57/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
60 words
A RESINOUS BLEND COMPOSITION COMPRISING A BLEND OF AN ESSENTIALLY ISOTACTIC, CRYSTALLINE POLYPROPYLENE CONTAINING, A MINOR AMOUNT, SUFFICIENT TO IMPROVE THE LEAST SEALABILITY OF FILM PREPARED THEREFROM, OF FROM ABOUT 5% TO ABOUT 40% BY WEIGHT OF A NORMALLY SOLID, RESINOUS, RANDOM MULTIPOLYMER OF A MIXTURE COMPRISING PENTADINE 1,3 AND AT LEAST ONE OTHER COMPOUND CONTAINING ETHYLENIC UNSATURATION COPOLYMERIZABLE THEREWITH.
Claim 2
Dependent Claim
60 words
A RESINOUS BLEND COMPOSITION COMPRISING A BLEND OF AN ESSENTIALLY ISOTACTIC, CRYSTALLINE POLYPROPYLENE CONTAINING, A MINOR AMOUNT, SUFFICIENT TO IMPROVE THE LEAST SEALABILITY OF FILM PREPARED THEREFROM, OF FROM ABOUT 5% TO ABOUT 40% BY WEIGHT OF A NORMALLY SOLID, RESINOUS, RANDOM MULTIPOLYMER OF A MIXTURE COMPRISING PENTADINE 1,3 AND AT LEAST ONE OTHER COMPOUND CONTAINING ETHYLENIC UNSATURATION COPOLYMERIZABLE THEREWITH.
Claim 3
Dependent Claim
40 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene 1-3 copolymerized with a member selected from the group consisting of cyclopentadiene, isoprene, 2-methylbutene-2, tertiary butylstyrene, Beta -pinene, dipentene, Beta -phellandrene, Alpha -methylstyrene, and mixtures thereof.
Claim 4
Dependent Claim
19 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene 1,3 copolymerized with tertiary butylstyrene.
Claim 5
Dependent Claim
21 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene 1,3 copolymerized with cyclopentadiene, isoprene and 2-methylbutene-2.
Claim 6
Dependent Claim
18 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene copolymerized with Beta -pinene.
Claim 7
Dependent Claim
23 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene 1-3 copolymerized with dipentene, Beta -phellandrene and Alpha -methylstyrene.
Claim 8
Dependent Claim
22 words
A resinous blend, as defined in claim 1, wherein the multipolymer has a melting point of about 70* to about 125* C.
Claim 9
Dependent Claim
57 words
An oriented essentially isotactic crystalline polypropylene film containing a minor amount by weight, sufficient to improve the heat seal characteristics of said film, of from about 5% to about 40% by weight of a normally solid, resinous, random, multipolymer of a mixture comprising pentadiene 1-3 and at least one other hydrocarbon compound containing ethylenic unsaturation copolymerizable therewith.
Claim 10
Dependent Claim
57 words
An oriented essentially isotactic crystalline polypropylene film containing a minor amount by weight, sufficient to improve the heat seal characteristics of said film, of from about 5% to about 40% by weight of a normally solid, resinous, random, multipolymer of a mixture comprising pentadiene 1-3 and at least one other hydrocarbon compound containing ethylenic unsaturation copolymerizable therewith.
Claim 11
Dependent Claim
38 words
A film in accordance with claim 8 wherein said multipolymer comprises pentadiene 1-3 copolymerized with a member selected from the group consisting of cyclopentadiene, isoprene, 2-methylbutene-2, tertiary butylstyrene, Beta -pinene, dipentene, Beta -phellandrene, Alpha -methylstyrene, and mixtures thereof.
Claim 12
Dependent Claim
17 words
A film in accordance with claim 8 wherein said multipolymer comprises pentadiene 1,3 copolymerized with tertiary butylstyrene.
Claim 13
Dependent Claim
19 words
A film in accordance with claim 8 wherein said multipolymer comprises pentadiene 1-3 copolymerized with cyclopentadiene, isoprene and 2-methylbutene-2.
Claim 14
Dependent Claim
16 words
A film in accordance with claim 8 wherein said multipolymer comprises pentadiene copolymerized with Beta -pinene.
Claim 15
Dependent Claim
22 words
A film as defined in claim 8 wherein the multipolymer has a melting point of from about 70* to about 125* C.
Claim 16
Dependent Claim
21 words
A film in accordance with claim 8 wherein said multipolymer comprises pentadiene 1-3 copolymerized with dipentene, Beta -phellandrene and Alpha -methylstyrene.
Claim 17
Dependent Claim
73 words
An oriented, crystalline, polypropylene film, as defiNed in claim 8, containing about 5% to about 40% by weight of a normally solid, resinous, random, multipolymer of a mixture comprising from about 15% to about 30% by weight of pentadiene 1-3, from about 20% to about 40% by weight of Alpha -methylstyrene, from about 5% to about 30% by weight of dipentene, and from about 2% to about 15% by weight of Beta phellandrene.
Claim 18
Dependent Claim
24 words
An oriented, crystalline, polypropylene film as defined in claim 15 wherein said multipolymer has a melting point of from about 70* to about 125*C.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |