US3937762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealable thermoplastic film forming compositions
Assignee: Mobil Oil AS
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Filing: 1974-06-07
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Granted: 1976-02-10
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Expires: 1994-06-07
Abstract
Abstract A resinous blend composition, and thermoplastic film structures fabricated therefrom having improved physical properties, comprising a polyolefin (e.g., polypropylene & copolymers thereof with ethylene) 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, 2-methylbutene-2, tertiary butylstyrene, β-pinene, dipentene, β-phellandrene, α-methylstyrene, and mixtures thereof.
Inventors
- 👤 A. Michael Nahmias
- 👤 Edward M. Bullard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:35
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
61 words
A resinous blend composition comprising a blend of an essentially isotactic crystalline ethylene-propylene copolymer containing a minor amount sufficient to improve the heat sealability of film prepared therefrom of from about 5% to about 40% by weight of a normal solid, resinous, random multipolymer of a mixture comprising pentadiene 1,3 and at least one other compound containing ethylenic unsaturation copolymerizable therewith.
Claim 2
Dependent Claim
61 words
A resinous blend composition comprising a blend of an essentially isotactic crystalline ethylene-propylene copolymer containing a minor amount sufficient to improve the heat sealability of film prepared therefrom of from about 5% to about 40% by weight of a normal solid, resinous, random multipolymer of a mixture comprising pentadiene 1,3 and at least one other compound containing ethylenic unsaturation copolymerizable therewith.
Claim 3
Dependent Claim
37 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, β-pinene, dipentene, β-phellandrene, α-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
17 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene copolymerized with β-pinene.
Claim 7
Dependent Claim
25 words
A resinous blend composition in accordance with claim 1 wherein said ethylene-propylene copolymer is a random copolymer containing up to 5% by weight of ethylene.
Claim 8
Dependent Claim
21 words
A resinous blend composition in accordance with claim 1 wherein said multipolymer comprises pentadiene 1,3 copolymerized with dipentene, β-phellandrene and α-methylstyrene.
Claim 9
Dependent Claim
21 words
A resinous blend, as defined in claim 1, wherein the multipolymer has a melting point of about 70° to about 125°C.
Claim 10
Dependent Claim
58 words
An oriented essentially isotactic crystalline ethylene-propylene copolymer film containing a minor amount by weight, sufficient to improve the heat seal characterized by 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
58 words
An oriented essentially isotactic crystalline ethylene-propylene copolymer film containing a minor amount by weight, sufficient to improve the heat seal characterized by 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 12
Dependent Claim
35 words
A film in accordance with claim 9 wherein said multipolymer comprises pentadiene 1,3 copolymerized with a member selected from the group consisting of cyclopentadiene, isoprene, 2-methylbutene-2, tertiary butylstyrene, β-pinene, dipentene, β-phellandrene, α-methylstyrene, and mixtures thereof.
Claim 13
Dependent Claim
17 words
A film in accordance with claim 9 wherein said multipolymer comprises pentadiene 1,3 copolymerized with tertiary butylstyrene.
Claim 14
Dependent Claim
19 words
A film in accordance with claim 9 wherein said multipolymer comprises pentadiene 1,3 copolymerized with cyclopentadiene, isoprene and 2-methylbutene-2.
Claim 15
Dependent Claim
15 words
A film in accordance with claim 9 wherein said multipolymer comprises pentadiene copolymerized with β-pinene.
Claim 16
Dependent Claim
21 words
A film as defined in claim 9 wherein the multipolymer has a melting point of from about 70° to about 125°C.
Claim 17
Dependent Claim
19 words
A film in accordance with claim 9 wherein said multipolymer comprises pentadiene 1,3 copolymerized with dipentene, β-phellandrene and α-methylstyrene.
Claim 18
Dependent Claim
71 words
An oriented crystalline ethylene-propylene film as defined in claim 9 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 α-methylstyrene, from about 5% to about 30% by weight of dipentene, and from about 2% to about 15% by weight of β-phellandrene.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |