US4657982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of polyethylene and polybutenes
Assignee: Liqui Box Canada Inc
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Filing: 1983-12-27
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Granted: 1987-04-14
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Expires: 2003-12-27
Abstract
Abstract Blends, and films made therefrom, are disclosed, such blends being made from 80-99 percent by weight of a polyethylene, 0.5 to 10.0 percent by weight of a polybutene having a number average molecular weight of from 500 to 1500 and 0.5 to 10.0 percent by weight of a polybutene having a number average molecular weight of from 1700 to 10 000. The films are useful in stretch wrapping applications.
Inventors
- 👤 Alan K. Breck
- 👤 Alistair N. Mollison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:54
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08J2323/00; C08J2323/02; C08J2323/04; C08L2205/00; C08L2205/02; C08L2205/03; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
A blend comprising (a) 80 to 99% by weight of a polyethylene, in which the polyethylene is 70 to 100 wt. % of a linear ethylene-C 4 to C 8 -α-olefin copolymer and 30 to 0 wt. % of a polymer selected from high pressure polyethylenes and ethylene/vinyl acetate copolymers and mixtures thereof, (b) 0.5 to 10.0% by weight of a polybutene having a number average molecular weight of from 500 to 1500 and (c) 0.5 to 10% by weight of a polybutene having a number average molecular weight of from 1700 to 10,000.
Claim 2
Dependent Claim
94 words
A blend comprising (a) 80 to 99% by weight of a polyethylene, in which the polyethylene is 70 to 100 wt. % of a linear ethylene-C 4 to C 8 -α-olefin copolymer and 30 to 0 wt. % of a polymer selected from high pressure polyethylenes and ethylene/vinyl acetate copolymers and mixtures thereof, (b) 0.5 to 10.0% by weight of a polybutene having a number average molecular weight of from 500 to 1500 and (c) 0.5 to 10% by weight of a polybutene having a number average molecular weight of from 1700 to 10,000.
Claim 3
Dependent Claim
18 words
A film, having a thickness of from 12 to 76 μm, made from the blend of claim 1.
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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |