US5151331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent blockers and multilayer barrier coatings for thin films
Assignee: EIDP Inc
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Filing: 1992-02-05
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Granted: 1992-09-29
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Expires: 2012-02-05
Abstract
Abstract A film comprising alternating layers of polyvinylidene chloride resin and a solvent barrier such as polyvinyl alcohol provides superior barrier properties. Barrier and mechanical properties are enhanced when formulation additives are present at customary levels only in the outermost layers.
Inventors
- 👤 Charles L. Beeson
- 👤 Raymond T. Cole
- 👤 Gedeon I. Deak
- 👤 Harbeson H. Leidolf, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:28
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/50; B05D7/56; B05D7/58; B05D7/584; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J7/052; B05D2201/00; B05D2201/02; B05D2451/00; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/08; C08J2429/00; C08J2429/02; C08J2429/04; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888; Y10T428/31891; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
100 words
A coated film prepared by the following process: (a) applying a coating of solvent-borne polymeric composition to at least one surface of said film; (b) removing substantially all of the solvent from said at least one coating; (c) thereafter applying to the coated surface of said film a polymeric barrier layer; (d) applying to said polymeric barrier layer a subsequent coating of solvent-borne polymeric composition, carried in a solvent to which said polymeric barrier layer is substantially impermeable; and (e) removing the solvent from the subsequent coating; whereby the solvent carrying said subsequent coating does not permeate the underlying coating.
Claim 2
Dependent Claim
100 words
A coated film prepared by the following process: (a) applying a coating of solvent-borne polymeric composition to at least one surface of said film; (b) removing substantially all of the solvent from said at least one coating; (c) thereafter applying to the coated surface of said film a polymeric barrier layer; (d) applying to said polymeric barrier layer a subsequent coating of solvent-borne polymeric composition, carried in a solvent to which said polymeric barrier layer is substantially impermeable; and (e) removing the solvent from the subsequent coating; whereby the solvent carrying said subsequent coating does not permeate the underlying coating.
Claim 3
Dependent Claim
27 words
The coated film of claim 1 wherein the solvent which carries said subsequent coating of (d) is the same solvent which carries the underlying coating of (a).
Claim 4
Dependent Claim
34 words
The coated film of claim 2 wherein said polymeric barrier layer of (c) is applied from a solvent which does not permeate the underlying coating, which solvent is removed before applying said subsequent coating.
Claim 5
Dependent Claim
33 words
The coated film of claim 1 wherein said polymeric barrier layer is selected from the group consisting of polyvinyl alcohol, ethylene vinyl alcohol copolymers, methyl methacrylate vinyl alcohol copolymers, polyethyloxazoline, and mixtures thereof.
Claim 6
Dependent Claim
23 words
The coated film of claim 4 wherein said polymeric barrier layer is polyvinyl alcohol containing about 1 to 10 weight percent crosslinking agent.
Claim 7
Dependent Claim
25 words
The coated film of claim 1 wherein said underlying coating of (a) and said subsequent coating of (d) comprise at least one vinylidene chloride polymer.
Claim 8
Dependent Claim
28 words
The coated film of claim 6 wherein said vinylidene chloride polymer is a copolymer of at least about 85 weight percent polyvinylidene chloride with methacrylonitrile and methyl methacrylate.
Claim 9
Dependent Claim
26 words
The coated film of claim 7 wherein the solvent from which said coatings of vinylidene chloride polymer are applied is a mixture of touene and tetrahydrofuran.
Claim 10
Dependent Claim
23 words
The coated film of claim 1 wherein steps (c), (d), and (e) are repeated to provide a film with multiple polymeric barrier layers.
Claim 11
Dependent Claim
50 words
The coated film of claim 1 wherein the solvent-borne polymer of (a) is a polymeric vinylidene chloride composition containing less that about 3 weight percent organic formulation additives and the solvent-borne polymer of (d) is a polymeric vinylidene chloride composition containing at least about 3 weight percent organic formulation additives.
Claim 12
Dependent Claim
22 words
The coated film of claim 10 wherein the solvent-borne polymer of (a) contains less than about 1 weight percent organic formulation additives.
Claim 13
Dependent Claim
22 words
The coated film of claim 11 wherein the solvent-borne polymer of (a) contains less than about 0.5 weight percent organic formulation additives.
Claim 14
Dependent Claim
121 words
A coated film manufactured by the following process: (a) applying a coating of solvent-borne polymeric composition comprising at least one vinylidene chloride polymer to at least one surface of said film; (b) removing substantially all of the solvent from said at least one coating; (c) thereafter applying to the coated surface of said film, from a solvent comprising water, a water soluble polymeric barrier layer; (d) applying to said polymeric barrier layer a subsequent coating of solvent-borne polymeric composition comprising at least one vinylidene chloride polymer, carried in a solvent to which said polymeric barrier layer is substantially impermeable; and (e) removing the solvent from the subsequent coating; whereby the solvent carrying said subsequent coating does not permeate the underlying coating.
Claim 15
Dependent Claim
121 words
A coated film manufactured by the following process: (a) applying a coating of solvent-borne polymeric composition comprising at least one vinylidene chloride polymer to at least one surface of said film; (b) removing substantially all of the solvent from said at least one coating; (c) thereafter applying to the coated surface of said film, from a solvent comprising water, a water soluble polymeric barrier layer; (d) applying to said polymeric barrier layer a subsequent coating of solvent-borne polymeric composition comprising at least one vinylidene chloride polymer, carried in a solvent to which said polymeric barrier layer is substantially impermeable; and (e) removing the solvent from the subsequent coating; whereby the solvent carrying said subsequent coating does not permeate the underlying coating.
References Cited (Backward Citations)
US5102699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-29 | 1996-03-30 | 1996-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-29 | 2000-03-30 | 2000-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-29 | 2004-03-30 | 2004-09-29 | $7700.00 | Window Closed / Lapsed |