US4983432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene vinyl alcohol copolymers containing platelet-type mica fillers of multi-layer containers
Assignee: EIDP Inc
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Filing: 1988-12-20
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Granted: 1991-01-08
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Expires: 2008-12-20
Abstract
Abstract A barrier resin composition is disclosed is which contains 50 to 95 weight percent ethylene/vinyl alcohol copolymer having a melt flow of 0.1 to 100 g/10 minutes as measured at 210° C. and 50 to 5 weight percent mica having a particle size of less than 74 microns and an aspect ratio of from 10 to 150. The composition can be prepared by melt blending a mixture of the ethylene/vinyl alcohol copolymer and the mica. Alternatively, the composition can be prepared by forming a dispersion of this mica in a solution of the ethylene/vinyl alcohol copolymer followed by precipitating the ethylene/vinyl alcohol copolymer.
Inventors
- 👤 Thomas C. Bissot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:28
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; B; B32; B32B; B32B27/00; B32B27/18; B32B27/20; C08K2201/00; C08K2201/016; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1372; Y10T428/25; Y10T428/251; Y10T428/31504; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A multilayer structure comprising a first layer of structural thermoplastic polymer and a second layer of a composition comprising 50 to 95 percent by weight of an ethylene/vinyl alcohol copolymer having an ethylene content of 20 to 60 mole percent, a melt flow rate of from 0.1 to 100 g/10 minutes as measured at 210° C., and 50 to 5 percent by weight of mica wherein at least 95% by weight of the mica particles have a particle size of less than 38 microns, a platelet like shape and an aspect ratio of 10 to 150.
Claim 2
Dependent Claim
96 words
A multilayer structure comprising a first layer of structural thermoplastic polymer and a second layer of a composition comprising 50 to 95 percent by weight of an ethylene/vinyl alcohol copolymer having an ethylene content of 20 to 60 mole percent, a melt flow rate of from 0.1 to 100 g/10 minutes as measured at 210° C., and 50 to 5 percent by weight of mica wherein at least 95% by weight of the mica particles have a particle size of less than 38 microns, a platelet like shape and an aspect ratio of 10 to 150.
Claim 3
Dependent Claim
27 words
The multilayer structure of claim 1 wherein said second layer comprises 70 to 85% by weight ethylene/vinyl alcohol copolymer and from 30 to 15% by weight mica.
Claim 4
Dependent Claim
19 words
The multilayer structure of claim 2 wherein the ethylene/vinyl alcohol copolymer contains from 25 to 50 mole % ethylene.
Claim 5
Dependent Claim
27 words
The multilayer structure of claim 3 wherein the ethylene/vinyl alcohol copolymer has a melt flow rate of 1.3 to 30 g/10 minutes as measured at 210° C.
Claim 6
Dependent Claim
21 words
The multilayer structure of claim 1 wherein a layer of adhesive is interposed between said first layer and said second layer.
Claim 7
Dependent Claim
16 words
The multilayer structure of claim 5 wherein the layer of adhesive is a carboxyl modified polyolefin.
Claim 8
Dependent Claim
44 words
The multilayer structure of claim 5 comprising five layers, two outer layers of structural thermoplastic resin, a core layer of a blend of ethylene/vinyl alcohol copolymer and mica and interposed between said core layer and each of said outer layers, layers of adhesive resin.
Claim 9
Dependent Claim
11 words
The laminate of claim 1 in the form of a container.
Claim 10
Dependent Claim
11 words
The laminate of claim 8 in the form of a bottle.
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) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |