Patent US4053540A successfully refreshed from Google Patents.
US4053540A
Expired / Lapsed
US
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Self-sealing films
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1976-08-16
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Granted: 1977-10-11
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Expires: 1996-08-16
Abstract
Abstract A composition suitable for fabricating into a self-sealing film comprises: I. 95.0 to 99.9 wt.% of either a copolymer of ethylene and vinyl acetate, said copolymer containing 0.10 to 1.95 wt.% of the vinyl acetate, or 95.0 to 99.9 wt.% of a mixture of a thermoplastic polyolefin and a copolymer of ethylene and vinyl acetate, the proportion of polymerized vinyl acetate in the mixture being from 0.10 to 1.95 wt.% and Ii. 0.01 to 5.0 wt.% of a partial ester of a carboxylic acid and a polyol, e.g. sorbitan monolaurate. The film can be made for example by tubular blowing.
Inventors
- 👤 Federico Argurio
- 👤 Mario Borsatti
- 👤 Jan Heindrijckx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:30
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C09; C09J; C09J7/00; C09J7/10; C08J2323/00; C08J2323/02; C08J2323/04; C08L23/08; C08L23/0846; C08L23/0853; C09J2301/00; C09J2301/40; C09J2301/408; C09J2423/00; C09J2423/04; C09J2431/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A composition suitable for fabricating into a self-sealing film consisting essentially of i. 95.0 to 99.9 wt. % of a mixture of thermoplastic polyethylene and a copolymer of ethylene and vinyl acetate, the copolymer containing 3 to 10 wt. % of polymerized vinyl acetate, the proportion of polymerized vinyl acetate in the mixture being from 0.10 to 1.95 wt. %; and ii. 0.01 to 5.0 wt. % of a partial ester, the partial ester being gylcerol monooleate or a monoester of sorbitol or sorbitan and a C 10 to C 24 carboxylic acid.
Claim 2
Dependent Claim
93 words
A composition suitable for fabricating into a self-sealing film consisting essentially of i. 95.0 to 99.9 wt. % of a mixture of thermoplastic polyethylene and a copolymer of ethylene and vinyl acetate, the copolymer containing 3 to 10 wt. % of polymerized vinyl acetate, the proportion of polymerized vinyl acetate in the mixture being from 0.10 to 1.95 wt. %; and ii. 0.01 to 5.0 wt. % of a partial ester, the partial ester being gylcerol monooleate or a monoester of sorbitol or sorbitan and a C 10 to C 24 carboxylic acid.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein the partial ester is sorbitan monolaurate.
Claim 4
Dependent Claim
17 words
A composition according to claim 2 wherein the amount of partial ester is 1 to 3 wt.%.
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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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |