US4289830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-vinyl alcohol copolymer gas barrier layer with phenol additive
Assignee: Pechiney Plastic Packaging Inc
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Filing: 1980-03-14
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Granted: 1981-09-15
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Expires: 2000-03-14
Abstract
Abstract The addition of a small amount of a phenol to an ethylene-vinyl alcohol oxygen-barrier layer significantly improves oxygen impermeability under high humidity conditions.
Inventors
- 👤 II Jack E. Knott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; B32B7/00; B32B7/04; B32B7/12; C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/724; B32B2553/00; C08K2201/00; C08K2201/008; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
48 words
In a multi-layer polymer structure having an ethylene-vinyl alcohol gas-barrier layer, the improvement which comprises the forming of the gas-barrier layer from ethylene-vinyl alcohol to which has been added an orthosubstituted phenol having a melting point below about 185° C. and a boiling point above about 125° C.
Claim 2
Dependent Claim
48 words
In a multi-layer polymer structure having an ethylene-vinyl alcohol gas-barrier layer, the improvement which comprises the forming of the gas-barrier layer from ethylene-vinyl alcohol to which has been added an orthosubstituted phenol having a melting point below about 185° C. and a boiling point above about 125° C.
Claim 3
Dependent Claim
49 words
A multi-layer packaging film structure comprising at least one structural polymer layer and a gas-barrier layer, the gas-barrier layer consisting essentially of ethylene-vinyl alcohol polymer to which has been added an ortho-substituted phenol having a melting point below about 185° C. and a boiling point above about 125° C.
Claim 4
Dependent Claim
49 words
A multi-layer packaging film structure comprising at least one structural polymer layer and a gas-barrier layer, the gas-barrier layer consisting essentially of ethylene-vinyl alcohol polymer to which has been added an ortho-substituted phenol having a melting point below about 185° C. and a boiling point above about 125° C.
Claim 5
Dependent Claim
74 words
A multi-layer packaging film structure comprising an outer structural polymer layer of nylon or a polyolefin with a modified polyolefin adhesive layer, a gas-barrier layer consisting essentially of ethylenevinyl alcohol polymer to which has been added an orthosubstituted phenol having a melting point below about 185° C. and a boiling point above about 125° C., an adhesive layer of a modified polyolefin, an inner structural layer of a polyolefin, and an inside heat-sealable layer.
Claim 6
Dependent Claim
74 words
A multi-layer packaging film structure comprising an outer structural polymer layer of nylon or a polyolefin with a modified polyolefin adhesive layer, a gas-barrier layer consisting essentially of ethylenevinyl alcohol polymer to which has been added an orthosubstituted phenol having a melting point below about 185° C. and a boiling point above about 125° C., an adhesive layer of a modified polyolefin, an inner structural layer of a polyolefin, and an inside heat-sealable layer.
Claim 7
Dependent Claim
22 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of 2-hydroxy-4 octoxybenzophenone.
Claim 8
Dependent Claim
22 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of 2-hydroxy-4 methoxybenzophenone.
Claim 9
Dependent Claim
22 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of 2,4 dihydroxybenzophenone.
Claim 10
Dependent Claim
25 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of octyl 3-(3',5'-di t-butyl-4'-hydroxy) phenyl propionate.
Claim 11
Dependent Claim
23 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of 2(2'-hydroxy-3',5' di-tertamyl) phenyl-benzotriazole.
Claim 12
Dependent Claim
23 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of tertiary butyl salicylate.
Claim 13
Dependent Claim
21 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of t-butylhydroquinone.
Claim 14
Dependent Claim
28 words
The structure according to claim 1 wherein the phenol constitutes about 1 percent by weight of the ethylene-vinyl alcohol of 2-hydroxy-4 octoxybenzophenone plus about 9 percent low-density polyethylene.
Claim 15
Dependent Claim
51 words
In a multi-layer polymer structure having an ethylene-vinyl alcohol polymer gas-barrier layer, the improvement which comprises the forming in the gas-barrier layer from ethylene-vinyl alcohol to which has been added an ultraviolet, light-absorbing orthosubstituted phenol having a melting point below about 185° C. and a boiling point above about 125° C.
Claim 16
Dependent Claim
51 words
In a multi-layer polymer structure having an ethylene-vinyl alcohol polymer gas-barrier layer, the improvement which comprises the forming in the gas-barrier layer from ethylene-vinyl alcohol to which has been added an ultraviolet, light-absorbing orthosubstituted phenol having a melting point below about 185° C. and a boiling point above about 125° C.
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |