EP0186894A2
Expired / Lapsed
EP
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Multilayer structure
Assignee: General Electric Co
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Filing: 1985-12-23
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Granted: —
•
Expires: 2005-12-23
Abstract
Abstract A multilayer composition comprising at least one polycarbonate layer, at least one polyolefin layer, and at least one olefin vinyl alcohol layer, said layers being adhered together by means of tie layers containing a tie material selected from mo- dffied polyolefin graft copolymers and olefin vinyl ester copolymers.
Inventors
- 👤 Harold Frazee Giles, Jr.
- 👤 Robert Paul Hirt, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 03:35
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/30; B32B27/306; B32B27/32; B32B27/36; B32B27/365; B32B7/00; B32B7/04; B32B7/12; B32B2272/00; B32B2323/00; B32B2323/10; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
58 words
A multilayer structure comprising: (i) at least one polycarbonate layer; (ii) at least one olefin vinyl alcohol layer; and (iii) at least one polyolefin layer; said layers being adhered together by means of tie layers disposed between said layers, said tie layers being comprised of a tie material selected from olefin vinyl ester copolymers and modified polyolefin copolymers.
Claim 2
Dependent Claim
58 words
A multilayer structure comprising: (i) at least one polycarbonate layer; (ii) at least one olefin vinyl alcohol layer; and (iii) at least one polyolefin layer; said layers being adhered together by means of tie layers disposed between said layers, said tie layers being comprised of a tie material selected from olefin vinyl ester copolymers and modified polyolefin copolymers.
Claim 3
Dependent Claim
25 words
The structure of claim 1 wherein said modified polyolefin copolymer is a graft copolymer of a polyolefin and a carboxylic acid or a carboxylic anhydride.
Claim 4
Dependent Claim
14 words
The structure of claim 2 wherein said polyolefin is a polymer of an alpha-olefin.
Claim 5
Dependent Claim
14 words
The structure of claim 3 wherein said alpha-olefin is ethylene, propylene, and mixtures thereof.
Claim 6
Dependent Claim
17 words
The structure of claim 4 wherein said carboxylic acid is selected from acrylic acids and methacrylic acids.
Claim 7
Dependent Claim
12 words
The structure of claim 5 wherein said carboxylic acid is acrylic acid.
Claim 8
Dependent Claim
12 words
The structure of claim 6 wherein said carboxylic anhydride is maleic anhydride.
Claim 9
Dependent Claim
14 words
The structure of claim 1 wherein said olefin vinyl ester is ethylene vinyl acetate.
Claim 10
Dependent Claim
14 words
The structure of claim 1 wherein said olefin vinyl alcohol is ethylene vinyl alcohol.
Claim 11
Dependent Claim
10 words
.The structure of claim 1 wherein said polyolefin is polypropylene.
Claim 12
Dependent Claim
27 words
The structure of claim 1 which contains a polycarbonate layer, a polyolefin layer, and a olefin vinyl alcohol layer bonded together by means of said tie layers.
Claim 13
Dependent Claim
12 words
The structure of claim 11 wherein said polycarbonate is a bisphenol-A polycarbonate.
Claim 14
Dependent Claim
8 words
The structure of claim11wherein said polyolefin is polypropylene.
Claim 15
Dependent Claim
14 words
The structure of claim 11 wherein said olefin vinyl alcohol is ethylene vinyl alcohol
Claim 16
Dependent Claim
33 words
The structure of claim 11 wherein said olefin vinyl alcohol is an intermediate layer disposed between a polycarbonate layer and a polyolefin layer and is bonded thereto by means of said tie layers.
Claim 17
Dependent Claim
13 words
The structure of claim 15 wherein said polyolefin layer is comprised of polypropylene.
Claim 18
Dependent Claim
17 words
The structure of claim 16 wherein said olefin vinyl alcohol layer is comprised of ethylene vinyl alcohol.
Claim 19
Dependent Claim
14 words
The structure of claim 17 wherein said polycarbonate layer is comprised of bisphenol-A polycarbonate.
Claim 20
Dependent Claim
25 words
The structure of claim 18 wherein said tie layers are comprised of a tie material selected from olefin vinyl ester copolymers and modified polyolfin copolymers.
Claim 21
Dependent Claim
16 words
The structure of claim 19 wherein said tie layers are comprised of a modified polyolefin copolymer.
Claim 22
Dependent Claim
25 words
The structure of claim 20 wherein said modified polyolefin copolymer is a graft copolymer of a polyolfin and a carboxylic acid or a carboxylic anhydride.
Claim 23
Dependent Claim
17 words
The strucrue of claim 21 wherein said carboxylic acid is selected from acrylic acids and methacrylic acids.
Claim 24
Dependent Claim
12 words
The structure of claim 22 wherein said acrylic acid is acrylic acid.
Claim 25
Dependent Claim
14 words
The structure of claim 22 wherein said polyolefin component is derived from an alpha-olefin.
Claim 26
Dependent Claim
16 words
The structure of claim 24 wherein said alpha-olefin is selected from ethylene, propylene, and mixtures thereof.
Claim 27
Dependent Claim
12 words
The structure of claim 24 wherein said carboxylic anhydride is maleic anhydride.
Claim 28
Dependent Claim
16 words
The structure of claim 19 wherein said tie layers are comprised of a olefin vinyl ester.
Claim 29
Dependent Claim
10 words
The structure of claim 26 wherein said olefin is ethylene.
Claim 30
Dependent Claim
10 words
The structure of claim 27 wherein said ester is acetate.
Claim 31
Dependent Claim
41 words
A composition comprising a physical admixture of: (i) at least one polycarbonate; (ii) at least one polyolefin; (iii) at least one olefin vinyl alcohol copolymer; and (iv) at least one material selected from olefin vinyl ester copolymers and modified polyolefin copolymers.
Claim 32
Dependent Claim
41 words
A composition comprising a physical admixture of: (i) at least one polycarbonate; (ii) at least one polyolefin; (iii) at least one olefin vinyl alcohol copolymer; and (iv) at least one material selected from olefin vinyl ester copolymers and modified polyolefin copolymers.
Claim 33
Dependent Claim
24 words
The composition of claim 30 wherein said modified polyolefin copolymer is a graft copolymer of a polyolefin and a carboxylic acid or carboxylic anhydride.
Claim 34
Dependent Claim
18 words
The composition of claim 31 which contains a major amount of (i)-(iii) and a minor amount of (iv).
Claim 35
Dependent Claim
15 words
The composition of claim 32 which contains at least about 70 weight percent of (i)-(iii).
Claim 36
Dependent Claim
16 words
The composition of claim 33 which contains a maximum of about 30 weight percent of (iv).
Claim 37
Dependent Claim
14 words
The composition of claim 34 wherein said olefin vinyl alcohol is ethylene vinyl alcohol.
Claim 38
Dependent Claim
10 words
The composition of claim 35 wherein said polyolefin is polypropylene.
Claim 39
Dependent Claim
11 words
The composition of claim 36 wherein said polycarbonate is bipshenol-A polycarbonate.
Claim 40
Dependent Claim
10 words
The composition of claim 30 which further contains a filler.
Claim 41
Dependent Claim
16 words
The composition of claim 30 which further contains an impact modifying amount of an impact modifier.
References Cited (Backward Citations)
No citation records indexed.
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