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.

Abstract: Large diameter legume starch granules including starches derived from yellow field pea, Pisum sativum (var) and faba bean, Vicia faba L. (Leguminosae) which have been treated to remove protein and fiber, and to improve color 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 when the naturally occurring protein and fiber have been removed, and the color improved.

Abstract: Starch is prepared for use in the manufacture of paper products by reacting an alkaline hypochlorite oxidized starch with ammonium persulfate. The treatment provides a starch product which when pasted at high temperatures will degrade to give a low viscosity material. The process includes the steps of slurrying lightly oxidized starch in water and further oxidizing the starch with ammonium persulfate. When this starch is suspended in water and heated to pasting, it shows lower viscosities than other starches of comparable starting viscosities.

Abstract: The invention encompasses intermediate, starch-containing products in which the starch thickening capacity is inhibited by an aqueous dispersant system. These intermediate products can be readily converted into a starch thickened end-product by combining the intermediate product with additives which dissipate the inhibitory effect of the aqueous dispersant. The intermediate products may be provided as a concentrate which contains cold-water swelling starch granules suspended in an aqueous media adapted to effectively maintain the starch granules in an unswollen form. The intermediate products may be suitably formulated with all the desired recipe ingredients except the amount of water needed to convert it into a starch thickened end-product.

Abstract: The further modification of acid modified flours and starches by reacting such acid modified flours, at a pH of less than about 3.0 with an alkylene oxide, preferably ethylene oxide, in order to scavenge residual acidity, raise the pH of the product and partially crosslink it. The thus created new crosslinked product is useful in gypsum wall board core binders and other applications.