US5700560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas barrier resin composition and its film and process for producing the same
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1995-04-04
•
Granted: 1997-12-23
•
Expires: 2015-04-04
Abstract
Abstract A gas barrier resin composition or its film having very high level gas barrier and moisture barrier properties, which includes at least a high hydrogen-bonding resin and a non-film-forming inorganic laminar compound having a particle size of 5 mu m and an aspect ratio of 50-5,000. The resin composition or its film can be produced by dispersing a non-film-forming inorganic laminar compound in a high hydrogen-bonding resin or resin solution in such a state that the non-film-forming inorganic laminar compound is swollen or cloven with a solvent, and removing the solvent from the dispersion, if necessary in the form of a film, while maintaining the state.
Inventors
- 👤 Kozo Kotani
- 👤 Toshio Kawakita
- 👤 Taiichi Sakaya
- 👤 Toshiya Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:32
CPC Classifications
C; C08; C08K; C08K7/00; B; B32; B32B; B32B27/00; B32B27/18; C08K3/00; C08K3/34; C08K3/346; C08K2201/00; C08K2201/008; C08K2201/016; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/259
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
80 words
A resin composition comprising a high hydrogen-bonding resin containing from 20 wt % to 60 wt % of a hydrogen-bonding group or ionic group based on a total weight of the hydrogen-bonding resin, and a non-film-forming clay mineral having a swellability, the resin composition having a volume ratio of the clay mineral to the hydrogen-bonding resin in the range of 5:95 to 90:10, wherein the clay mineral has an aspect ratio of in a range of from 50 to 5000.
Claim 2
Dependent Claim
80 words
A resin composition comprising a high hydrogen-bonding resin containing from 20 wt % to 60 wt % of a hydrogen-bonding group or ionic group based on a total weight of the hydrogen-bonding resin, and a non-film-forming clay mineral having a swellability, the resin composition having a volume ratio of the clay mineral to the hydrogen-bonding resin in the range of 5:95 to 90:10, wherein the clay mineral has an aspect ratio of in a range of from 50 to 5000.
Claim 3
Dependent Claim
24 words
The resin composition according to claim 1, wherein the aspect ratio of the clay mineral is in a range of from 200 to 3,000.
Claim 4
Dependent Claim
30 words
The resin composition according claim 1, wherein the weight percentage of the hydrogen-bonding group or ionic group per unit weight of the hydrogen-bonding resin is in the range of 30-50%.
Claim 5
Dependent Claim
18 words
The resin composition according to claim 1, wherein the high hydrogen-bonding resin is polyvinyl alcohol or a polysaccharide.
Claim 6
Dependent Claim
21 words
The resin composition according to claim 1, which further contains a cross-linking agent for the hydrogen-bonding group of the hydrogen-bonding resin.
Claim 7
Dependent Claim
16 words
The resin composition according to claim 5, wherein the cross-linking agent is a compound containing zirconium.
Claim 8
Dependent Claim
24 words
A laminated film or laminate having at least one layer formulated from the composition claimed in claim 1, 2, 3, 4, 5, or 6.
Claim 9
Dependent Claim
52 words
A laminated film or laminate comprising: at least one layer selected from the group consisting of a biaxially oriented polypropylene film, a biaxially oriented nylon film and a biaxially oriented polyethylene terephthalate film; and at least one layer formulated from the composition claimed in claim 1, 2, 3, 4, 5, or 6.
Claim 10
Dependent Claim
29 words
The resin composition according to claim 1, wherein the clay mineral is selected from the group consisting of montmorillonite, hectorite, sodium terasililic mica, sodium taeniolite, and any combination thereof.
Claim 11
Dependent Claim
91 words
A water-resistant gas-barrier film formulated at least from a resin composition, said resin composition comprising a high hydrogen-bonding resin containing from 20 wt % to 60 wt % of a hydrogen-bonding group or ionic group based on a total weight of the hydrogen-bonding resin, and a non-film-forming clay mineral having a swellability, the resin composition having a volume ratio of the clay mineral to the hydrogen-bonding resin in the range of 5:95 to 90:10 wherein the clay mineral has an aspect ratio of in a range of from 50 to 5000.
Claim 12
Dependent Claim
91 words
A water-resistant gas-barrier film formulated at least from a resin composition, said resin composition comprising a high hydrogen-bonding resin containing from 20 wt % to 60 wt % of a hydrogen-bonding group or ionic group based on a total weight of the hydrogen-bonding resin, and a non-film-forming clay mineral having a swellability, the resin composition having a volume ratio of the clay mineral to the hydrogen-bonding resin in the range of 5:95 to 90:10 wherein the clay mineral has an aspect ratio of in a range of from 50 to 5000.
Claim 13
Dependent Claim
25 words
A water-resistant gas-barrier film according to claim 10, wherein the aspect ratio of the clay mineral is in a range of from 200 to 3,000.
Claim 14
Dependent Claim
32 words
A water-resistant gas-barrier film according to claim 10, wherein the weight percentage of the hydrogen-bonding group or ionic group per unit weight of the hydrogen-bonding resin is in the range of 30-50%.
Claim 15
Dependent Claim
19 words
A water-resistant gas-barrier film according to claim 10, wherein the high hydrogen-bonding resin is polyvinyl alcohol or a polysaccharide.
Claim 16
Dependent Claim
22 words
A water-resistant gas-barrier film according to claim 10, which further contains a cross-linking agent for the hydrogen-bonding group of the hydrogen-bonding resin.
Claim 17
Dependent Claim
17 words
A water-resistant gas-barrier film according to claim 14, wherein the cross-linking agent is a compound containing zirconium.
Claim 18
Dependent Claim
32 words
A water-resistant gas-barrier film according to claim 10, wherein the film has an oxygen permeability per μm of thickness at 31° C. and 61% RH of 2 cc/m 2 /day/atm or less.
Claim 19
Dependent Claim
32 words
A water-resistant gas-barrier film according to claim 10, wherein the film has an oxygen permeability per μm of thickness at 31° C. and 61% RH of 0.2 cc/m 2 /day/atm or less.
Claim 20
Dependent Claim
30 words
A water-resistant gas-barrier film according to claim 10, wherein the clay mineral is selected from the group consisting of montmorillonite, hectorite, sodium terasililic mica, sodium taeniolite, and any combination thereof.
References Cited (Backward Citations)
GB1136350A
Cited
US4528235A
Cited
JPS62148532A
Cited
JPS63132950A
Cited
JPS63301245A
Cited
JPS6443554A
Cited
EP0309095A1
Cited
JPH01313536A
Cited
WO1990005761A2
Cited
US5019446A
Cited
US5106890A
Cited
JPH0393542A
Cited
EP0459472A1
Cited
JPH0480259A
Cited
JPH04178459A
Cited
US5244729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-22 | 2001-06-23 | 2001-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-22 | 2005-06-23 | 2005-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-22 | 2009-06-23 | 2009-12-23 | $7700.00 | Window Closed / Lapsed |