US4883694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming flexible packages and novel flexible packages
Assignee: Ineos Composites IP LLC
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Filing: 1989-03-13
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Granted: 1989-11-28
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Expires: 2009-03-13
Abstract
Abstract High performance polymer systems based on water dispersed polyurethanes obtained from the reaction of NCO terminated prepolymers with a peroxide compound containing at least one active hydrogen atom, methods of making such polymer systems and their use as hydrolytically stable flexible substrate bonding agents are disclosed. Flexible packages, e.g., retortable laminate pouches, are formed by bonding together sections of films, foils or like flexible substrates using such adhesives.
Inventors
- 👤 Balasubramaniam Ramalingam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/10; C08G18/83; C08G18/86; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1307; Y10T428/1334; Y10T428/1338; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
31 words
A flexible package comprising a joint between a plurality of sections of flexible substrate bonded together by an layer of adhesive comprising a chain extended urethane polymer containing peroxy carbamyl groups.
Claim 2
Dependent Claim
31 words
A flexible package comprising a joint between a plurality of sections of flexible substrate bonded together by an layer of adhesive comprising a chain extended urethane polymer containing peroxy carbamyl groups.
Claim 3
Dependent Claim
14 words
The package of claim 1 wherein said peroxy carbamyl groups are O,O-dicarbamyl peroxide linkages.
Claim 4
Dependent Claim
15 words
The flexible package of claim 1 wherein said substrate is a non-porous film or foil.
Claim 5
Dependent Claim
13 words
The flexible package of claim 1 wherein said substrate is a polyolefin film.
Claim 6
Dependent Claim
13 words
The flexible package of claim 1 wherein said substrate is a polyethylene film.
Claim 7
Dependent Claim
11 words
The flexible package of claim 1 which is a retortable pouch.
Claim 8
Dependent Claim
41 words
A flexible package comprising a joint between a plurality of sections of flexible substrate bonded together by an layer of adhesive comprising a polyurethane reaction product on an NCO terminated prepolymer and a peroxide containing at least one active hydrogen atom.
Claim 9
Dependent Claim
41 words
A flexible package comprising a joint between a plurality of sections of flexible substrate bonded together by an layer of adhesive comprising a polyurethane reaction product on an NCO terminated prepolymer and a peroxide containing at least one active hydrogen atom.
Claim 10
Dependent Claim
12 words
The flexible package of claim 7 wherein said peroxide is hydrogen peroxide.
Claim 11
Independent Claim
74 words
A method of forming a flexible package which comprises providing an aqueous system adhesive comprising an aqueous dispersion of a polyurethane containing peroxy carbamyl groups, providing at least one flexible substrate, applying a layer of said adhesive to at least one selected section of said substrate and forming at least one joint between said selected section of said substrate and another section of the same or different substrate by sandwiching said adhesive layer therebetween.
Claim 12
Independent Claim
74 words
A method of forming a flexible package which comprises providing an aqueous system adhesive comprising an aqueous dispersion of a polyurethane containing peroxy carbamyl groups, providing at least one flexible substrate, applying a layer of said adhesive to at least one selected section of said substrate and forming at least one joint between said selected section of said substrate and another section of the same or different substrate by sandwiching said adhesive layer therebetween.
Claim 13
Dependent Claim
14 words
The method of claim 9 wherein said peroxy carbamyl groups are O,O-dicarbamyl peroxide linkages.
Claim 14
Dependent Claim
14 words
The method of claim 9 wherein the package produced thereby is a retortable pouch.
Claim 15
Dependent Claim
52 words
A retortable pouch comprising: at least one flexible substrate, at least one joint between a selected section of said substrate and another section of the same or different substrate and a layer of adhesive comprising a chain extended urethane polymer containing peroxy carbamyl groups sandwiched between said substrate and said another section.
Claim 16
Dependent Claim
52 words
A retortable pouch comprising: at least one flexible substrate, at least one joint between a selected section of said substrate and another section of the same or different substrate and a layer of adhesive comprising a chain extended urethane polymer containing peroxy carbamyl groups sandwiched between said substrate and said another section.
Claim 17
Dependent Claim
14 words
The retortable pouch of claim 12 wherein said flexible substrate is a polyolefin film.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |