Patent US4454281A successfully refreshed from Google Patents.
US4454281A
Expired / Lapsed
US
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Formulation for high clarity linear low density polyethylene film products
Assignee: Union Carbide Corp
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Filing: 1982-12-01
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Granted: 1984-06-12
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Expires: 2002-12-01
Abstract
Abstract An ethylene polymer film forming composition comprising an ethylene polymer and from about 450 to about 6000 ppm preferably 500 to 5000 ppm of metal salt of a fatty acid having from 7 to 22 carbon atoms and from about 300 to 7000 ppm preferably 500 to 4000 ppm of an antiblocking agent.
Inventors
- 👤 William D. Heitz
- 👤 George E. Ealer
- 👤 Gary S. Cieloszyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:09
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
An ethylene polymer film forming composition comprising a linear narrow molecular weight distribution ethylene hydrocarbon copolymer containing greater than or equal to 85% ethylene and less than or equal to 15% of one or more C 3 to C 8 alpha-olefin, from about 500 to about 5000 parts per million of a zinc salt of a fatty acid having from 7 to 22 carbon atoms and from about 500 to 4000 ppm of an inorganic antiblocking agent.
Claim 2
Dependent Claim
77 words
An ethylene polymer film forming composition comprising a linear narrow molecular weight distribution ethylene hydrocarbon copolymer containing greater than or equal to 85% ethylene and less than or equal to 15% of one or more C 3 to C 8 alpha-olefin, from about 500 to about 5000 parts per million of a zinc salt of a fatty acid having from 7 to 22 carbon atoms and from about 500 to 4000 ppm of an inorganic antiblocking agent.
Claim 3
Dependent Claim
26 words
An ethylene polymer film forming composition according to claim 1 wherein said inorganic antiblocking agent is amphorous silica, synthetic silica, talc, diatomaceous earth or calcium carbonate.
Claim 4
Dependent Claim
20 words
An ethylene polymer film forming composition according to claim 1 wherein said alpha-olefin is propylene, butene-1, hexene-1,4-methyl pentene-1, or octene-1.
Claim 5
Dependent Claim
17 words
An ethylene polymer film forming composition according to claim 1 wherein said zinc salt is zinc stearate.
Claim 6
Dependent Claim
33 words
An ethylene polymer film forming composition according to claim 1, wherein said hydrocarbon copolymer has a melt flow ratio of greater than or equal to 25 to less than or equal to 33.
Claim 7
Dependent Claim
32 words
An ethylene polymer film forming composition according to claim 1 wherein said hydrocarbon copolymer has a density of about greater than or equal to 0.915 to less than or equal to 0.945.
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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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |