US5208083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blends with enhanced properties
Assignee: Rohm and Haas Co
•
Filing: 1992-02-28
•
Granted: 1993-05-04
•
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 06:56
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.
References Cited (Backward Citations)
US2557266A
Cited
US2509857A
Cited
GB1482058A
Cited
US4003963A
Cited
US4410482A
Cited
US4246374A
Cited
US4284671A
Cited
US4362844A
Cited
US4427825A
Cited
US4727117A
Cited
US4877662A
Cited
EP0238197A2
Cited
US4650824A
Cited
EP0273897A2
Cited
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 |