US4720425A
Expired / Lapsed
US
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Multi-layer laminated structure
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-12-02
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Granted: 1988-01-19
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Expires: 2006-12-02
Abstract
Abstract A multi-layer laminated structure comprising a polycarbonate or thermoplastic polyester layer having adjacently adhered thereto a layer comprised of a modified olefin polymer having a stiffness modulus of from 100 to 3,000 Kg/cm2 and a degree of crystallinity of not more than 33%, in which an unsaturated carboxylic acid or the derivative thereof is grafted to at least a part of a polymer consisting of a hydrocarbon. The laminated structure is excellent in moisture impermeability, oxygen barrier property, adhesion durability under a high temperature and high humidity condition, moldability, processability, and the like, and is useful as a packaging material.
Inventors
- 👤 Masafumi Hattori
- 👤 Takayuki Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/36; B32B27/365; B32B2270/00; B32B2307/00; B32B2307/50; B32B2307/70; B32B2307/704; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1386; Y10T428/27; Y10T428/31504; Y10T428/31507; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A multi-layer laminated structure comprising a polycarbonate or thermoplastic polyester layer having adjacently adhered thereto a layer comprised of a modified olefin polymer having a stiffness modulus of from 100 to 2,000 kg/cm 2 and a degree of crystallinity of not more than 33%, in which an unsaturated carboxylic acid or the derivative thereof is grafted to at least a part of a polymer consisting of a hydrocarbon, said unsaturated carboxylic acid or the derivative thereof being present in an amount of from 0.01 to 5% by weight based on the modified olefin polymer.
Claim 2
Dependent Claim
94 words
A multi-layer laminated structure comprising a polycarbonate or thermoplastic polyester layer having adjacently adhered thereto a layer comprised of a modified olefin polymer having a stiffness modulus of from 100 to 2,000 kg/cm 2 and a degree of crystallinity of not more than 33%, in which an unsaturated carboxylic acid or the derivative thereof is grafted to at least a part of a polymer consisting of a hydrocarbon, said unsaturated carboxylic acid or the derivative thereof being present in an amount of from 0.01 to 5% by weight based on the modified olefin polymer.
Claim 3
Dependent Claim
32 words
A multi-layer laminated structure as in claim 1, wherein said polymer consisting of a hydrocarbon is a homopolymer of an α-olefin, a copolymer of two or more α-olefins or a mixture thereof.
Claim 4
Dependent Claim
20 words
A multi-layer laminated structure as in claim 1, wherein said unsaturated carboxylic acid or the derivative thereof is maleic anhydride.
Claim 5
Dependent Claim
23 words
A multi-layer laminated structure as in claim 1, wherein said modified olefin polymer has a degree of crystallinity of not more than 25%.
Claim 6
Dependent Claim
16 words
A multi-layer laminated structure as in claim 1, wherein said modified olefin polymer is partly crosslinked.
Claim 7
Dependent Claim
35 words
A multi-layer laminated structure as in claim 5, wherein the degree of crosslinking is such that the residue after extraction with cyclohexane at room temperature for 48 hours is from 40 to 80% by weight.
Claim 8
Dependent Claim
39 words
A multi-layer laminated structure as in claim 1, wherein said modified olefin polymer is a blend of said grafted polymer and at least one of high temperature-melting and high-crystalline olefin resinous polymer and low-crystalline and low-stiffness modulus olefin rubber.
Claim 9
Dependent Claim
26 words
A multi-layer laminated structure as in claim 1, wherein said modified olefin polymer is a diluted product of said grafted polymer with an unmodified olefin polymer.
Claim 10
Dependent Claim
36 words
A multi-layer laminated structure according to claim 8, wherein the olefin rubber has a degree of crystallinity of not more than 33% and the high-crystalline resinous polymer has a degree of crystallinity of more than 33%.
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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |