US4818782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene vinyl alcohol copolymers containing platelet-type mica fillers, processes for preparing same and multi-layer containers with layers thereof
Assignee: EIDP Inc
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Filing: 1987-07-30
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Granted: 1989-04-04
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Expires: 2007-07-30
Abstract
Abstract A barrier resin composition is disclosed 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
2026-11-06 09:13
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/30; B32B27/306; B32B7/00; B32B7/04; B32B7/12; C; C08; C08K; C08K3/00; C08K3/34; B32B2329/00; B32B2329/04; B32B2439/00; B32B2439/40; B32B2439/60; C08K2201/00; C08K2201/016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
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 from 0.1 to 100 g/10 minutes as measured at 210° C., and 50 to 5 percent by weight of muscovite mica wherein at least 95% by weight of the mica particles have a particle size of less than 20 microns, a platelet like shape and an aspect ratio of 20 to 150.
Claim 2
Dependent Claim
80 words
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 from 0.1 to 100 g/10 minutes as measured at 210° C., and 50 to 5 percent by weight of muscovite mica wherein at least 95% by weight of the mica particles have a particle size of less than 20 microns, a platelet like shape and an aspect ratio of 20 to 150.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the ethylene/vinyl alcohol copolymer contains from 25 to 50 mole percent ethylene.
Claim 4
Dependent Claim
26 words
The composition of claim 2 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 5
Dependent Claim
28 words
The composition of claim 3 wherein from 70 to 85 weight percent ethylene/vinyl alcohol copolymer is present and from 30 to 15 percent by weight mica is present.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein a pigmentary amount of titanium dioxide is present.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein from 0.1 to 10% by weight aluminum flake is present.
References Cited (Backward Citations)
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JPS56161462A
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US4528235A
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US4618528A
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JPS5929123A
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US4560715A
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |