US3880832A
Expired / Lapsed
US
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Starch ether derivatives and preparation thereof
Assignee: Ingredion Inc
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Filing: 1974-03-21
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Granted: 1975-04-29
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Expires: 1994-03-21
Abstract
Abstract Aqueous slurries or dispersions of starch are reacted with Nhaloacetyl derivatives of selected amines, amino acids or peptides to yield starch ether derivatives. The starch ether derivatives of this invention are useful in a number of applications including use in paper sizes, coatings and adhesives.
Inventors
- 👤 Martin M Tessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:12
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A METHOD FOR THE PREPARATION OF STARCH ETHERS COMPRISING: A. REACTING, AT A TEMPERATURE OF 30* TO 90*C. A STARCH BASE WITH COMPOUND CORRESPONDING TO THE FORMULA
Claim 2
Independent Claim
27 words
A METHOD FOR THE PREPARATION OF STARCH ETHERS COMPRISING: A. REACTING, AT A TEMPERATURE OF 30* TO 90*C. A STARCH BASE WITH COMPOUND CORRESPONDING TO THE FORMULA
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein said reaction is conducted at a temperature of from about 42* to 52*C. and for a period of from 1 to 24 hours.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said starch base is a granular starch.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said starch base is a gelatinized starch.
Claim 6
Dependent Claim
37 words
The method of claim 1 wherein the reagent is the N-haloacetyl derivative of a compound selected from the group consisting of DL-alanine, DL-phenylalanine, DL-methionine, L-tyrosine, glycylglycine, diethylamine, diallylamine, dicyanomethylamine, t-butylamine, 2-amino-ethanol, aminoacetaldehyde dimethyl acetal, and methylaminoacetaldehyde dimethylacetal.
Claim 7
Dependent Claim
16 words
As a composition of matter, a starch ether derivative prepared by the method of claim 1.
References Cited (Backward Citations)
US3033852A
Cited
US3477904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |