US4297144A
Expired / Lapsed
US
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High speed corrugating adhesives
Assignee: Unilever Bestfoods North America
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Filing: 1979-08-13
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Granted: 1981-10-27
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Expires: 1999-08-13
Abstract
Abstract High speed corrugating adhesives are provided based upon the use of certain specified saponifiable starch ester materials. These may be in the form of no-carrier type formulations, in which a single phase is present wherein the starch material is in the form of partially swollen granules. Alternatively, the formulation may have a carrier phase and an adhesive phase. The specific formulations described have superior properties that permit higher corrugating machine speeds.
Inventors
- 👤 Gary H. Klein
- 👤 Howard L. Arons
- 👤 Joseph F. Stejskal
- 👤 Donald G. Stevens
- 👤 Henry F. Zobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:31
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/40; B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; C; C09; C09J; C09J103/00; C09J103/04; C09J103/06; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/54
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
130 words
In a process for the preparation of a corrugating adhesive composition of the no-carrier type, comprising the steps of preparing a heated reaction mixture of ungelatinized starch material, water and alkali, allowing the reaction to proceed until a Stein-Hall viscosity of about 20 to about 90 seconds is reached, and adding a reaction stopper to the mixture, the improvement which consists of replacing at least a portion of the starch material with a saponifiable starch ester derived from a non-waxy grain source characterized as 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 compared with unmodified corn starch under the same test conditions and having a saponifiable D.S. of at least about 0.015.
Claim 2
Dependent Claim
130 words
In a process for the preparation of a corrugating adhesive composition of the no-carrier type, comprising the steps of preparing a heated reaction mixture of ungelatinized starch material, water and alkali, allowing the reaction to proceed until a Stein-Hall viscosity of about 20 to about 90 seconds is reached, and adding a reaction stopper to the mixture, the improvement which consists of replacing at least a portion of the starch material with a saponifiable starch ester derived from a non-waxy grain source characterized as 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 compared with unmodified corn starch under the same test conditions and having a saponifiable D.S. of at least about 0.015.
Claim 3
Dependent Claim
19 words
A process according to claim 1, the improvement wherein said saponifiable starch ester is a corn starch acetate succinate.
Claim 4
Dependent Claim
34 words
A process in accordance with claim 1, the improvement wherein said saponifiable starch ester is a corn starch acetate succinate having a saponifiable D.S. in the range of from about 0.025 to about 0.045.
Claim 5
Dependent Claim
109 words
An adhesive composition for use in a high speed corrugating process which comprises an aqueous dispersion of the reaction product of: (1) a starch material formed by saponfication of a starch ester derived from a non-waxy grain source having a saponifiable degree of substitution of at least about 0.015 and characterized as 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 corn starch under the same test conditions; and (2) an amount of alkali sufficient to substantially completely saponify said ester and to render said composition effective in said process.
Claim 6
Dependent Claim
109 words
An adhesive composition for use in a high speed corrugating process which comprises an aqueous dispersion of the reaction product of: (1) a starch material formed by saponfication of a starch ester derived from a non-waxy grain source having a saponifiable degree of substitution of at least about 0.015 and characterized as 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 corn starch under the same test conditions; and (2) an amount of alkali sufficient to substantially completely saponify said ester and to render said composition effective in said process.
Claim 7
Dependent Claim
33 words
A composition in accordance with claim 4, wherein said composition further includes up to about 5% additional alkali and up to about 5% borax (10 mol), based on total starch material, commercial basis.
Claim 8
Dependent Claim
18 words
A composition in accordance with claim 4, wherein said saponifiable starch ester is a saponifiable corn starch ester.
Claim 9
Dependent Claim
29 words
A composition in accordance with claim 4, wherein said saponifiable starch ester is selected from the group consisting of starch acetate, starch succinate, starch acetate succinate and mixtures thereof.
Claim 10
Dependent Claim
33 words
A composition in accordance with claim 4, wherein said saponifiable starch ester is a corn starch acetate succinate, having a saponifiable degree of substitution in the range from about 0.025 to about 0.045.
Claim 11
Dependent Claim
34 words
In a composition for use in a high speed corrugating process which comprises an aqueous dispersion of an adhesive in a carrier phase, the improvement wherein said adhesive is the composition of claim 4.
Claim 12
Dependent Claim
17 words
A composition in accordance with claim 9, wherein said carrier phase comprises a gelantinized, unmodified corn starch.
Claim 13
Dependent Claim
13 words
A composition in accordance with claim 9, wherein said carrier phase comprises carboxymethylcellulose.
Claim 14
Dependent Claim
33 words
A composition in accordance with claim 9, wherein said composition further includes up to about 5% additional alkali and up to about 5% borax (10 mol), based on total starch material, commercial basis.
Claim 15
Dependent Claim
18 words
A composition in accordance with claim 9, wherein said saponifiable starch ester is a saponifiable corn starch ester.
Claim 16
Dependent Claim
29 words
A composition in accordance with claim 9, wherein said saponifiable starch ester is selected from the group consisting of starch acetate, starch succinate, starch acetate succinate, and mixtures thereof.
Claim 17
Dependent Claim
31 words
A composition in accordance with claim 9, wherein said saponifiable starch ester is a corn starch acetate succinate, having a saponifiable D.S. in the range from about 0.025 to about 0.045.
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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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |