Patent US5147930A successfully refreshed from Google Patents.
US5147930A
Expired / Lapsed
US
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Polymer blends with enhanced properties
Assignee: Rohm and Haas Co
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Filing: 1989-11-16
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Granted: 1992-09-15
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Expires: 2009-11-16
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
- 👤 Edward E. La Fleur
- 👤 Robert M. Amici
- 👤 William T. Freed
- 👤 William J. Work
- 👤 William G. Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:15
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; Y10T428/1334; Y10T428/1341; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
97 words
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
97 words
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
25 words
The gas-barrier polymer blend of claim 1 wherein the first polymer is present at from about 30% to about 95% by weight of the blend.
Claim 4
Dependent Claim
25 words
The gas-barrier polymer blend of claim 1 wherein the first polymer is present at from about 40% to about 70% by weight of the blend.
Claim 5
Dependent Claim
39 words
The gas-barrier polymer blend of claim 1 wherein the glutarimide has the formula ##STR2## wherein R 1 and R 2 are selected from H and lower alkyl, and R 3 is selected from hydrogen, alkyl, aryl, alkaryl and aralkyl.
Claim 6
Dependent Claim
13 words
The gas-barrier polymer blend of claim 4 wherein R 3 is lower alkyl.
Claim 7
Dependent Claim
12 words
The gas-barrier polymer blend of claim 4 wherein R 3 is methyl.
Claim 8
Dependent Claim
29 words
The gas-barrier polymer blend of claim 1 wherein the lower alkyl (meth)acrylate is methyl methacrylate and R 1 , R 2 and R 3 of the glutarimide are methyl.
Claim 9
Dependent Claim
21 words
The gas-barrier polymer blend of claim 7 wherein the first polymer contains at least about 60 mole percent mers of glutarimide.
Claim 10
Dependent Claim
21 words
The gas-barrier polymer blend of claim 1 wherein the first polymer contains at least about 80 mole percent mers of glutarimide.
Claim 11
Dependent Claim
37 words
The gas-barrier polymer blend of claim 1 where the first polymer contains one or more additional mers selected from styrene, α-methylstyrene, p-hydroxystyrene, (meth)acrylic acid, (meth)acrylic anhydride, (meth)acrylamide, maleic anhydride, maleimide, cyclohexyl (meth)acrylate, N-aklylmaleimedes, N-arylmaleimides, N-vinylpyrrolidone or 4-vinylpyridine.
Claim 12
Dependent Claim
19 words
The gas-barrier polymer blend of claim 10 wherein the additional mers are present at up to 30 mole percent.
Claim 13
Dependent Claim
22 words
The gas-barrier polymer blend of claim 1 wherein the first polymer has a weight-average molecular weight from about 50,000 to about 200,000.
Claim 14
Dependent Claim
23 words
The gas-barrier polymer blend of claim 1 wherein the first polymer contains at least about 80 mole percent mers of lower alkyl (meth)acrylate.
Claim 15
Dependent Claim
23 words
The gas-barrier polymer blend of claim 1 wherein the first polymer contains at least about 90 mole percent mers of lower alkyl (meth)acrylate.
Claim 16
Dependent Claim
15 words
The gas-barrier polymer blend of claim 14 wherein the lower alkyl (meth)acrylate is methyl methacrylate.
Claim 17
Dependent Claim
25 words
The gas-barrier polymer blend of claim 1 wherein the second polymer is present at from about 5% to about 35% by weight of the blend.
Claim 18
Dependent Claim
14 words
The gas-barrier polymer blend of claim 1 wherein the second polymer contains ethylene mers.
Claim 19
Dependent Claim
25 words
The gas-barrier polymer blend of claim 17 wherein the ethylene mers are present at about 15 to about 50 mol percent of the second polymer.
Claim 20
Dependent Claim
25 words
The gas-barrier polymer blend of claim 17 wherein the ethylene mers are present at about 25 to about 50 mol percent of the second polymer.
Claim 21
Dependent Claim
27 words
The gas-barrier polymer blend of claim 1 wherein the permeability to oxygen of the blend is 1% or less of the permeability of the first polymer alone.
Claim 22
Dependent Claim
27 words
The gas-barrier polymer blend of claim 1 wherein the permeability to oxygen of the blend is 0.1% or less of the permeability of the first polymer alone.
Claim 23
Dependent Claim
23 words
The gas-barrier polymer blend of claims 1, 2, 4, 7, 9, 14, 16 or 18, in the form of a film or sheet.
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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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |