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AssigneeDanisco US Inc.
InventorsNathaniel T Becker, Douglas A Dale, Ryan M Kawakita, Herbert B Sher, Scott A Strobel, Tina Jeoh Zicari
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Described are compositions and methods relating to a coated granule comprising a core coated with cross-linkable polymer, where the cross-linkable polymer is applied using a feed suspension that includes an acid-neutralized volatile base and a calcium salt insoluble at the pH of the neutralized feed suspension. Volatilization of the base decreases the pH of the feed suspension, thereby solubilizing the calcium salt, and inducing in situ ion-mediated cross-linking of the cross-linkable polymer.
A method for applying cross-linked coatings comprising a benefit agent onto cores, comprising:
The method of any of the preceding claims, wherein the amount of cross-linkable polymer in the feed suspension is at least about 1.5%, at least about 2.0% or at least about 2.5%.
The method of any of the preceding claims, wherein the amount of cross-linkable polymer in the feed suspension is between about 1.5% and 3.0%.
The method of any of the preceding claims, wherein the amount of cross-linkable polymer in the coating is at least about 8% and less than about 20%.
The method of any of the preceding claims, wherein the feed suspension further comprises a hydrophobic compound.
The method of any of the preceding claims, wherein the calcium salt is selected from the group consisting of dicalcium phosphate, calcium carbonate, calcium oxalate, calcium phosphate, calcium meta-silicate, calcium tartrate and combinations, thereof.
The method of any of the preceding claims, wherein the acid is an organic acid selected from the group consisting of adipic acid, acrylic acid, glutaric acid, succinic acid, ascorbic acid, gallic acid, caffeic acid and combinations, thereof.
The method of any of the preceding claims, wherein the volatile base is selected from the group consisting of ammonia, methylamine, trimethylamine, ethylamine, diethylamine, and trimethylamine and combinations, thereof.
The method of any of the preceding claims, wherein the cores comprise a material selected from the group consisting of sodium sulfate or other inorganic salts, sucrose or other sugars or sugar alcohols, clay or other minerals or combinations, thereof.
The method of any of the preceding claims, further comprising applying an additional coating layer over the cross-linkable polymer-containing coating layer on the granular core material.
The method of any of the preceding claims, wherein the feed suspension further comprises a benefit agent.
The method of any of the preceding claims, wherein the cores comprise a benefit agent.
The method of any of the preceding claims, wherein the cores do not comprise a benefit agent.
The method of any of the preceding claims, wherein the cross-linkable polymer is selected from the group consisting of alginate, carrageenan, pectin, agar, starch, xanthan gum, guar gum, gum arabic, glactomannans, and proteins such as gelatin, collagen, casein, zein, soy protein, whey protein, potato protein, album, or derivatives thereof;
The method of any of the preceding claims, wherein the cross-linkable polymer is alginate, or a derivative, thereof.
Particles produced by the method of any of the previous claims.
A layered fluid-bed spray-coated granule comprising a core coated with a layer of cross-linkable polymer.
Dependencies are inferred from the claim text.