Sugar – starch – and carbohydrates – Products – Miscellaneous
Patent
1974-06-10
1976-12-07
Wolk, Morris O.
Sugar, starch, and carbohydrates
Products
Miscellaneous
106 22, 106210, 106308C, 127 32, 127 33, 127 70, 127 71, 252316, 536106, 282 275, 428306, 428307, 428323, 428327, B01J 1300, C13L 108, D21H 328
Patent
active
039960609
ABSTRACT:
Large diameter starch granules derived from yellow field pea, Pisum sativum (var) and faba bean, Vicia faba L. (Leguminosae) are used to replace scarce arrowroot starch granules as a protective stilt material in microencapsulated coatings, including carbonless copy paper. The "stilt" material is used to prevent premature rupture of the microcapsules and early release of the microencapsulated materials. It has been discovered that the natural granule size, and other granule properties of the yellow field pea and faba bean starches are ideally suited to replace arrowroot starch granules as a protective material. In certain coating processes in which the temperature at the coated surface exceeds the normal pasting temperature of these starch granules, the pasting temperature of the granules can be raised by a crosslinking reaction under temperature and pH conditions to preserve the granular structure of the starch particles. A polyfunctional crosslinking agent, such as epichlorohydrin, phosphorus oxychloride, acrolein, or urea-formaldehyde can be used. Under highly alkaline conditions, using phosphorus oxychloride in a stepwise reaction procedure, it is possible to increase the pasting temperature of the starch granules by more than 25.degree. F.
These large diameter starch particles may also be used for other purposes, such as for anti-offset powders in lithography, either with or without crosslinking or other derivatization to further improve chemical and physical properties. These starches are also useful as absorbable dusting powders. The large granule starches derived from most varieties of peas and beans can be used in the same manner.
REFERENCES:
patent: 3630774 (1971-12-01), Knight
patent: 3825467 (1974-07-01), Phillips
patent: 3900671 (1975-08-01), Evans
patent: 3901725 (1975-08-01), Bond
J. A. Radley, "Starch and Its Derivatives," vol. 2, 3rd ed., 328-329,330-331, John Wiley and Sons, New York, 1954.
"Starch: Chem. & Tech," R. L. Whistler, ed. vol. 1, 75, 81, Academic Press, New York, 1965.
Chemical Abstracts, (I), 73: 111064a (1970).
Chemical Abstracts, (II), 80: 9123b (1974).
A. E. Staley Manufacturing Company
Barnett Howard J.
Marantz Sidney
Meyerson Charles J.
Wolk Morris O.
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