Patent ID: 9273229
Filing Date: 2016-03-01
CPC Classification: A61K,A61Q,C09F

Claim Text:
1. A method of producing a de-colored shellac composition comprising: (a) heating and dissolving colored shellac in an aqueous solution comprising an alkaline agent; (b) contacting said colored shellac in said aqueous solution with a sufficient amount of a chlorite salt to de-color said colored shellac; (c) precipitating said de-colored shellac by neutralizing the aqueous solution in (b) with an acid; and (d) recovering said precipitated de-colored shellac from said aqueous solution, thereby de-coloring said colored shellac; and (e) adding an additive during and/or after (a), (b), (c), and/or (d), wherein said additive is selected from: an organic additive; metallic oxide nanoparticles; an anti-caries agent; a flavor or odor improving agent; and any combination thereof.