Patent US4240841A successfully refreshed from Google Patents.
US4240841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
No-carrier corrugating adhesive
Assignee: Unilever Bestfoods North America
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Filing: 1978-07-19
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Granted: 1980-12-23
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Expires: 1998-07-19
Abstract
Abstract No-carrier corrugating adhesives having improved rheological characteristics for high speed machine use in the production of corrugated materials are described. These adhesives, which comprise alkaline, aqueous dispersions of partially swollen starch material, contain up to about 4% by starch weight of a flow modifier for providing the adhesive with a Bostwick viscosity of less than about 75 seconds to 15 centimeters.
Inventors
- 👤 Alphonse J. DiDominicis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:31
CPC Classifications
C; C09; C09J; C09J103/00; C09J103/02; C09J103/04; C09J103/06; C08; C08L; C08L2666/00; C08L2666/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
In a high-speed, no-carrier corrugating adhesive comprising an alkaline, aqueous dispersion of partially swollen starch material formed by saponification of a starch ester having a degree of substitution of at least about 0.015 and having at least about 30% greater area under an Instron force-time heating curve and at least about 30% greater area under an Instron force-time cooling curve than unmodified starch under the same conditions, wherein the starch material comprises between about 10% to 25% by total weight of adhesive, the improvement comprising an effective amount of flow modifier up to about 4% by starch material weight, wherein said flow modifier comprises lauric acid, for improving the rheological characteristics of said dispersion to provide said adhesive with a Bostwick viscosity of less than about 75 seconds to 15 centimeters.
Claim 2
Dependent Claim
131 words
In a high-speed, no-carrier corrugating adhesive comprising an alkaline, aqueous dispersion of partially swollen starch material formed by saponification of a starch ester having a degree of substitution of at least about 0.015 and having at least about 30% greater area under an Instron force-time heating curve and at least about 30% greater area under an Instron force-time cooling curve than unmodified starch under the same conditions, wherein the starch material comprises between about 10% to 25% by total weight of adhesive, the improvement comprising an effective amount of flow modifier up to about 4% by starch material weight, wherein said flow modifier comprises lauric acid, for improving the rheological characteristics of said dispersion to provide said adhesive with a Bostwick viscosity of less than about 75 seconds to 15 centimeters.
Claim 3
Dependent Claim
12 words
The adhesive of claim 1, wherein the flow modifier comprises calcium stearate.
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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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |