Patent US5208083A successfully refreshed from Google Patents.
US5208083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blends with enhanced properties
Assignee: Rohm and Haas Co
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Filing: 1992-02-28
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Granted: 1993-05-04
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Expires: 2012-02-28
Abstract
Abstract Polymer blends of a) polymers containing predominantly mers of (meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than about 50 mol % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.
Inventors
- 👤 William T. Freed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:08
CPC Classifications
C; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L33/00; C08L33/04; C08L33/06; C08L33/24; B; B29; B29K; B29K2995/00; B29K2995/0018; B29K2995/0025; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/139; Y10T428/1393
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
A container having walls suitable for protecting the container contents from environmental gases, the walls being a gas-barrier polymer blend comprising a) from about 20 to about 95% by weight of a first polymer containing at least 50 mole percent mers of one or both of lower alkyl (meth)acrylates and glutarimides and forming a continuous phase, and b) from about 2.5% to about 40% by weight of a second polymer having at least 50 mole percent vinyl alcohol mers which is either miscible with, or forms a discontinuous phase in, the continuous phase, wherein the permeability to oxygen of the blend is 10% or less of the permeability of the first polymer alone.
Claim 2
Dependent Claim
113 words
A container having walls suitable for protecting the container contents from environmental gases, the walls being a gas-barrier polymer blend comprising a) from about 20 to about 95% by weight of a first polymer containing at least 50 mole percent mers of one or both of lower alkyl (meth)acrylates and glutarimides and forming a continuous phase, and b) from about 2.5% to about 40% by weight of a second polymer having at least 50 mole percent vinyl alcohol mers which is either miscible with, or forms a discontinuous phase in, the continuous phase, wherein the permeability to oxygen of the blend is 10% or less of the permeability of the first polymer alone.
Claim 3
Dependent Claim
11 words
The container of claim 1 wherein the walls are biaxially oriented.
Claim 4
Dependent Claim
20 words
The container of claim 1 wherein the walls are a laminar structure having layers of one or more additional polymers.
Claim 5
Dependent Claim
8 words
The container of claim 1 having a closure.
Claim 6
Dependent Claim
11 words
The container of claim 1 in the form of a bottle.
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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) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |