US4911985A
Expired / Lapsed
US
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High density polyethylene compositions containing polyisobutylene rubber and filler
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1989-02-21
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Granted: 1990-03-27
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Expires: 2009-02-21
Abstract
Abstract A high density polyethylene composition comprising: from about 50 to about 95 weight percent of high density polyethylene; from about 5 to 40 weight percent of polyisobutylene rubber; and from about 1 to about 30 weight percent of a filler selected from the group consisting of mica, talc and mixtures thereof. Films made from the compositions have improved tear-resistance and puncture-resistance.
Inventors
- 👤 Edwin A. Jenkins
- 👤 Jay P. Porter
- 👤 William D. Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:09
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/18; B32B27/20; C; C08; C08J; C08J5/00; C08J5/18; C08K; C08K3/00; C08K3/34; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; B32B2307/00; B32B2307/50; B32B2307/58; B32B2307/581; B32B2307/582; B32B2307/5825; B32B2319/00; B32B2323/00; B32B2323/04; B32B2323/043; B32B2439/00; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; C08L23/18; C08L23/20; C08L23/22; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/259; Y10T428/31504; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
74 words
A high density polyethylene composition suitable for use in forming one layer of a multiply envelope construction having improved tear strength and puncture resistance, said composition consisting of: from about 50 to about 95 weight percent of high density polyethylene; from about 5 to about 40 weight percent of polyisobutylene rubber; and from about 1 to about 30 weight percent of a filler selected from the group consisting of mica, talc and mixtures thereof.
Claim 2
Dependent Claim
74 words
A high density polyethylene composition suitable for use in forming one layer of a multiply envelope construction having improved tear strength and puncture resistance, said composition consisting of: from about 50 to about 95 weight percent of high density polyethylene; from about 5 to about 40 weight percent of polyisobutylene rubber; and from about 1 to about 30 weight percent of a filler selected from the group consisting of mica, talc and mixtures thereof.
Claim 3
Dependent Claim
10 words
The composition of claim 1 wherein said filler is mica.
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein said polyisobutyene rubber has a molecular weight of about 750,000 and to 2,5000,000 as determined from the intrinsic viscosity in diisobutylene at 20° C.
Claim 5
Dependent Claim
30 words
The composition of claim 3 comprising from about 60 to 85 weight percent of high density polyethylene, 5 to 20 weight percent polyisobutylene and 3 to 15 weight percent mica.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein said mica is white mica.
Claim 7
Dependent Claim
31 words
The composition of claim 1 consisting of from about 60 to 85 weight percent of high density polyethylene, 5 to 20 weight percent polyisobutylene and 3 to 15 weight percent mica.
Claim 8
Dependent Claim
10 words
The composition of claim 6 wherein said filler is talc.
Claim 9
Dependent Claim
10 words
The composition of claim 1 wherein said filler is talc.
Claim 10
Dependent Claim
9 words
A film prepared from the composition of claim 1.
Claim 11
Dependent Claim
9 words
A film prepared from the composition of claim 4.
Claim 12
Dependent Claim
14 words
A multiply film construction including as one layer thereof the film of claim 9.
Claim 13
Dependent Claim
15 words
A multiply film construction including an outer layer formed from the composition of claim 1.
Claim 14
Dependent Claim
24 words
The composition of claim 1 consisting of about 70.5 weight percent of high density polyethylene, 17 weight percent polyisobutylene and 12.5 weight percent mica.
Claim 15
Dependent Claim
24 words
The composition of claim 1 consisting of about 70.5 weight percent of high density polyethylene, 17 weight percent polyisobutylene and 12.5 weight percent talc.
Claim 16
Dependent Claim
79 words
A multiply construction available for use in forming an envelope having improved tear strength and puncture resistance, said multiply construction including as one layer thereof a film prepared from a composition consisting of: from about 50 to about 95 weight percent of high density polyethylene; from about 5 to about 40 weight percent of polyisobutylene rubber; and from about 1 to about 30 weight percent of a filler selected from the group consisting of mica, talc and mixtures thereof.
Claim 17
Dependent Claim
79 words
A multiply construction available for use in forming an envelope having improved tear strength and puncture resistance, said multiply construction including as one layer thereof a film prepared from a composition consisting of: from about 50 to about 95 weight percent of high density polyethylene; from about 5 to about 40 weight percent of polyisobutylene rubber; and from about 1 to about 30 weight percent of a filler selected from the group consisting of mica, talc and mixtures thereof.
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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) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |