Patent US4104192A successfully refreshed from Google Patents.
US4882229A
Expired / Lapsed
US
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Blends of high molecular weight polybutylene with low density polyethylene
Assignee: Shell USA Inc
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Filing: 1988-04-29
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Granted: 1989-11-21
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Expires: 2008-04-29
Abstract
Abstract It has now been found that certain properties including peel seal characteristics of wrapping films or sheets may be improved by fabricating films or sheets from blends of high molecular weight butene-1 homopolymers or copolymers, and low density polyethylene (either modified or non-modified) and wherein such films or sheets can be bonded to a substrate such as aluminum foil, by coextrusion or lamination, with or without a tie layer adhesive forming novel structures.
Inventors
- 👤 Charles C. Hwo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:09
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L51/00; C08L51/06; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/06; C09J151/00; C09J151/06; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2311/00; B32B2311/24; B32B2323/00; B32B2323/04; B32B2323/046; B32B2377/00; B32B2581/00; C08L23/10; C08L23/18; C08L23/20; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
66 words
A composition which is capable of forming peel seals, comprising: from about 8 percent by weight to about 49 percent by weight of the butene-1 homopolymer or copolymer having an average molecular weight of at least 500,000; and from about 92 percent by weight to about 51 percent by weight of a modified or non-modified low density polyethylene having a density of less than 0.930 g/cc.
Claim 2
Dependent Claim
66 words
A composition which is capable of forming peel seals, comprising: from about 8 percent by weight to about 49 percent by weight of the butene-1 homopolymer or copolymer having an average molecular weight of at least 500,000; and from about 92 percent by weight to about 51 percent by weight of a modified or non-modified low density polyethylene having a density of less than 0.930 g/cc.
Claim 3
Dependent Claim
47 words
The composition of claim 1 which consists of: from about 10 percent by weight to about 30 percent by weight of said butene-1 homopolymer or copolymer; and from about 90 percent by weight to about 70 percent by weight of said modified or non-modified low density polyethylene.
Claim 4
Dependent Claim
47 words
The composition of claim 1 which consists of: from about 15 percent by weight to about 25 percent by weight of said modified or non-modified low density polyethylene; and from about 75 percent by weight to about 85 percent by weight of said butene-1 homopolymer or copolymer.
Claim 5
Dependent Claim
17 words
The composition of claim 1, wherein said modified low density polyethylene has been functionalized with maelic anhydride.
Claim 6
Dependent Claim
68 words
A film or sheet which is capable of forming peel seals, comprising: from about 8 percent by weight to about 49 percent by weight of a modified or non-modified low density polyethylene having a density of less than 0.930 g/cc; and from about 92 percent by weight to about 51 percent by weight of a butene-1 homopolymer or copolymer having an average molecular weight of at least 500,000.
Claim 7
Dependent Claim
68 words
A film or sheet which is capable of forming peel seals, comprising: from about 8 percent by weight to about 49 percent by weight of a modified or non-modified low density polyethylene having a density of less than 0.930 g/cc; and from about 92 percent by weight to about 51 percent by weight of a butene-1 homopolymer or copolymer having an average molecular weight of at least 500,000.
Claim 8
Dependent Claim
49 words
The film or sheet of claim 5 which consists of: from about 10 percent by weight to about 30 percent by weight of said modified or non-modified low density polyethylene, and from about 90 percent by weight to about 70 percent by weight of said butene-1 homopolymer or copolymer.
Claim 9
Dependent Claim
48 words
The film or sheet of claim 5 which consists of: from about 25 percent by weight to about 15 percent by weight of said modified or non-modified low density polyethylene; from about 75 percent by weight to about 85 percent by weight of said butene-1 homopolymer or copolymer.
Claim 10
Dependent Claim
19 words
The film or sheet of claim 5, wherein said modified low density polyethylene has been functionalized with maelic anhydride.
Claim 11
Dependent Claim
15 words
The film or sheet of claim 5 which comprises a biaxially oriented film or sheet.
Claim 12
Dependent Claim
16 words
The film or sheet of claim 5 which has been further disposed on a first substrate.
Claim 13
Dependent Claim
21 words
The film or sheet of claim 10, wherein the first substrate is a member of the group aluminum foil or polyamide.
Claim 14
Dependent Claim
12 words
The film or sheet of claim 11, wherein the polyamide is nylon.
Claim 15
Dependent Claim
88 words
A laminar structure comprising a first substrate to which a film or sheet is bonded by extrusion lamination or coextrusion forming a structure capable of forming peel seals, wherein said film or sheet comprises: from about 10 percent by weight to about 49 percent by weight of butene-1 homopolymer or copolymer having an average molecular weight of at least 500,000; from about 90 percent by weight to about 51 percent by weight of a modified or non-modified low density polyethylene having a density of less than 0.930 g/cc.
Claim 16
Dependent Claim
88 words
A laminar structure comprising a first substrate to which a film or sheet is bonded by extrusion lamination or coextrusion forming a structure capable of forming peel seals, wherein said film or sheet comprises: from about 10 percent by weight to about 49 percent by weight of butene-1 homopolymer or copolymer having an average molecular weight of at least 500,000; from about 90 percent by weight to about 51 percent by weight of a modified or non-modified low density polyethylene having a density of less than 0.930 g/cc.
Claim 17
Dependent Claim
52 words
The laminar structure of claim 13 wherein said film or sheet consists of: from about 10 percent by weight to about 30 percent by weight of said butene-1 homopolymer or copolymer; and from about 90 percent by weight to about 70 percent by weight of said modified or non-modified low density polyethylene.
Claim 18
Dependent Claim
52 words
The laminar structure of claim 13 wherein said film or sheet consists of: from about 25 percent by weight to about 15 percent by weight of said modified or non-modified low density polyethylene; and from about 75 percent by weight to about 85 percent by weight of said butene-1 homopolymer or copolymer.
Claim 19
Dependent Claim
13 words
The laminar structure of claim 13, wherein the first substrate is aluminum foil.
Claim 20
Dependent Claim
29 words
The laminar structure of claim 13, wherein the first substrate is aluminum foil and an additional tie layer adhesive is disposed between said film or sheet and said substrate.
Claim 21
Dependent Claim
16 words
The laminar structure of claim 17, wherein the tie layer adhesive is modified low density polyethylene.
Claim 22
Dependent Claim
15 words
The laminar structure in claim 13, wherein said film or sheet is unoriented or oriented.
Claim 23
Dependent Claim
12 words
The laminar structure of claim 13, further disposed on a second substrate.
Claim 24
Dependent Claim
21 words
The laminar structure of claim 20, wherein the second substrate is a member of the group; high density polyethylene, and polypropylene.
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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) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |