US4397916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated multilayer structure
Assignee: Mitsui Chemicals Inc
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Filing: 1981-02-24
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Granted: 1983-08-09
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Expires: 2001-02-24
Abstract
Abstract In a laminated multilayer structure composed of (A) a layer of a graft-modified ethylene resin grafted with an unsaturated carboxylic acid or a functional derivative thereof and (B) an oxygen- or nitrogen-containing polar resin layer or a metal layer in contact with the layer (A); the improvement wherein (1) the layer (A) consists of (i) 1 to 100% by weight of said graft-modified ethylene resin derived from an ethylene polymer which contains 0 to 15 mole % of at least one alpha-olefin having 3 to 30 carbon atoms as a comonomer and has an MI2/[ eta ]-8.77 ratio in absolute value of not less than 15 and a density of 0.88 to 0.98 g/cm3, and (ii) 99 to 0% by weight of an unmodified ethylene polymer containing 0 to 50 mole % of at least one alpha-olefin having 3 to 30 carbon atoms as a comonomer and having an MI2/[ eta ]-8.77 ratio in absolute value of not less than 15 and a density of 0.86 to 0.96 g/cm3, and (2) the layer (A) has (a) an ethylene content of not less than 80 mole %, (b) a content of the carboxylic acid or the derivative thereof of 0.01 to 10% by weight based on the weight of the layer (A), (c) a density of 0.88 to 0.98 g/cm3, and (d) an MI10/MI2 ratio of from 5 to 18.
Inventors
- 👤 Riichiro Nagano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B15/00; B32B15/04; B32B15/08; B32B27/06; B32B27/08; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L51/00; C08L51/06; B32B2553/00; C08L2203/00; C08L2203/10; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
239 words
In a laminated multilayer structure composed of (A) a layer of a graft-modified ethylene resin grafted with an unsaturated carboxylic acid or a functional derivative thereof and (B) an oxygen- or nitrogen-containing polar resin layer or a metal layer in contact with the layer (A); the improvement wherein (1) the layer (A) consists of (i) 1 to 100% by weight of said graft-modified ethylene resin derived from an ethylene polymer which contains 0 to 15 mole% of at least one alpha-olefin having 3 to 30 carbon atoms as a comonomer and has an MI 2 /[η] -8 .77 ratio in absolute value of not less than 15 and a density of 0.88 to 0.98 g/cm 3 , and (ii) 99 to 0% by weight of an unmodified ethylene polymer containing 0 to 50 mole% of at least one alpha-olefin having 3 to 30 carbon atoms as a comonomer and having an MI 2 /[η] -8 .77 ratio in absolute value of not less than 15 and a density of 0.86 to 0.96 g/cm 3 , and (2) the layer (A) has (a) an ethylene content of not less than 80 mole%, (b) a content of the carboxylic acid or the derivative thereof of 0.01 to 10% by weight based on the weight of the layer (A), (c) a density of 0.88 to 0.98 g/cm 3 , and (d) an MI 10 /MI 2 ratio of from 5 to 18.
Claim 2
Dependent Claim
239 words
In a laminated multilayer structure composed of (A) a layer of a graft-modified ethylene resin grafted with an unsaturated carboxylic acid or a functional derivative thereof and (B) an oxygen- or nitrogen-containing polar resin layer or a metal layer in contact with the layer (A); the improvement wherein (1) the layer (A) consists of (i) 1 to 100% by weight of said graft-modified ethylene resin derived from an ethylene polymer which contains 0 to 15 mole% of at least one alpha-olefin having 3 to 30 carbon atoms as a comonomer and has an MI 2 /[η] -8 .77 ratio in absolute value of not less than 15 and a density of 0.88 to 0.98 g/cm 3 , and (ii) 99 to 0% by weight of an unmodified ethylene polymer containing 0 to 50 mole% of at least one alpha-olefin having 3 to 30 carbon atoms as a comonomer and having an MI 2 /[η] -8 .77 ratio in absolute value of not less than 15 and a density of 0.86 to 0.96 g/cm 3 , and (2) the layer (A) has (a) an ethylene content of not less than 80 mole%, (b) a content of the carboxylic acid or the derivative thereof of 0.01 to 10% by weight based on the weight of the layer (A), (c) a density of 0.88 to 0.98 g/cm 3 , and (d) an MI 10 /MI 2 ratio of from 5 to 18.
Claim 3
Dependent Claim
43 words
The structure of claim 1 wherein layer (B) is the oxygen- or nitrogen-containing polar resin layer which is a layer of at least one resin selected from the group consising of polyamide resins, saponified copolymers of ethylene and vinyl acetate, and polyester resins.
Claim 4
Dependent Claim
21 words
The structure of claim 1 wherein the unsaturated dicarboxylic acid is an unsaturated dicarboxylic acid having 4 to 10 carbon atoms.
Claim 5
Dependent Claim
29 words
The structure of claim 1 wherein layer (B) is the metal layer which is a layer of a metal selected from Al, Fe, Cu, Sn, Ni, and alloys thereof.
Claim 6
Dependent Claim
89 words
The structure of claim 1 wherein (1) the layer (A) consists of (i) 3 to 100% by weight of said graft-modified ethylene resin, and (ii) 97 to 0% by weight of said unmodified ethylene polymer, and (2) the layer (A) has (a) an ethylene content of not less than 90 mole%, (b) a content of the carboxylic acid or the derivative thereof of 0.1 to 5% by weight based on the weight of the layer (A), and (d) an MI 10 /MI 2 ratio of from 6 to 18.
Claim 7
Dependent Claim
27 words
The structure of any one of claims 1, 2, 3, 4 or 5 wherein the layer A consists of 100% by weight of said graft-modified ethylene resin.
Claim 8
Dependent Claim
33 words
The structure of any one of claims 1, 2, 3, 4 or 5 wherein the layer (A) consists of a blend of the graft-modified ethylene resin (i) and the unmodified ethylene polymer (ii).
References Cited (Backward Citations)
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |