US4137276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible film laminating adhesives
Assignee: Ingredion Inc
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Filing: 1977-08-19
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Granted: 1979-01-30
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Expires: 1997-08-19
Abstract
Abstract Curable two-part flexible film laminating adhesives are prepared from: (a) an alcoholic solution of a ketimine and/or amine terminated polyetherurethane-urea prepared by the addition of at least 50% of the stoichiometric equivalent of a diketimine having --NH functionality of 0, 1 or 3 to an isocyanate terminated polyalkylene ether diol urethane prepolymer; and (b) a polyepoxide in a chain-extending and crosslinking amount of about 10-30% by weight, based on the weight of said ketimine and/or amine terminated polyetherurethane-urea solids. Laminates formed using these adhesives are characterized by rapid curing, high bond strength, superior heat resistance as well as chemical and water resistance.
Inventors
- 👤 Julius Sirota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/34; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08L; C08L63/00; C09; C09J; C09J175/00; C09J175/04; C09J175/08; B32B2323/00; B32B2323/04; B32B2323/046; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31551; Y10T428/31562; Y10T428/31565; Y10T428/31573; Y10T428/3158; Y10T428/31587; Y10T428/31591; Y10T428/31605
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A curable two-part laminating adhesive for flexible film comprising: (a) an alcoholic solution of ketimine terminated and/or amine terminated polyetherurethane-urea prepared by the addition of at least 50% of the stoichiometric equivalent of a diketimine having --NH functionality of 0, 1 or 3 to an isocyanate terminated polyalkylene ether diol urethane prepolymer; and (b) a polyepoxide in a chain-extending and cross-linking amount of about 10-30% by weight, based on the weight of said ketimine terminated and/or amine terminated polyetherurethane-urea solids.
Claim 2
Dependent Claim
80 words
A curable two-part laminating adhesive for flexible film comprising: (a) an alcoholic solution of ketimine terminated and/or amine terminated polyetherurethane-urea prepared by the addition of at least 50% of the stoichiometric equivalent of a diketimine having --NH functionality of 0, 1 or 3 to an isocyanate terminated polyalkylene ether diol urethane prepolymer; and (b) a polyepoxide in a chain-extending and cross-linking amount of about 10-30% by weight, based on the weight of said ketimine terminated and/or amine terminated polyetherurethane-urea solids.
Claim 3
Dependent Claim
51 words
The laminating adhesive of claim 1 wherein the prepolymer of part (a) is prepared by the reaction of a di-functional polyalkylene ether glycol selected from the group consisting of poly(oxytetramethylene)glycol, poly(oxyethylene) glycol, and poly(oxypropylene)glycol with a diisocyanate selected from the group consisting of hexamethylene diisocyanate, methylene bis(cyclohexyl isocyanate) and toluene diisocyanate.
Claim 4
Dependent Claim
39 words
The laminating adhesive of claim 1 wherein the diketimine used in part (a) is selected from the group consisting of ethylene diamine dimethyldiketimine, ethylene diamine methyl-ethyldiketimine, diethylene triamine dimethyldiketimine, di-ethylene triamine methylethyldiketimine, tetraethylene pentamine dimethyldiketimine and tetraethylene pentamine methylethyldiketimine.
Claim 5
Dependent Claim
20 words
The laminating adhesive of claim 1 wherein the polyepoxide of part (b) is a reaction product of epichlorohydrin and bisphenol-A.
Claim 6
Dependent Claim
31 words
The laminating adhesive of claim 1 wherein the polyepoxide is present in an amount of 15 to 25% by weight, based on the weight of the ketimine and/or amine-terminated polyetherurethane-urea solids.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |