Guar gum microcapsules
AssigneeInternational Flavors & Fragrances Inc.
InventorsTakashi Sasaki, Lewis Michael Popplewell, Ronald Gabbard, Ryan Chin, Yabin Lei, Julie Ann Wieland
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Abstract
Disclosed are microcapsule compositions having a microcapsule that contains a microcapsule core and a microcapsule shell encapsulating the microcapsule core. The microcapsule has a particle size of 1 micron to 100 microns in diameter. The microcapsule core contains an active material. The microcapsule shell is formed of at least three moieties, in which a first moiety is derived from a polygalactomannan, a second moiety is derived from a polyisocyanate, and a third moiety is derived from a multi-functional aldehyde or a tannic acid.
Claims13
A microcapsule composition comprising microcapsules that contain a microcapsule core and a microcapsule shell encapsulating the microcapsule core, wherein
- the microcapsule core contains an active material, and
- the microcapsule shell comprises a polygalactomannan crosslinked with a multi-functional aldehyde and a polyisocyanate,
- wherein the polygalactomannan is covalently bonded to the multi-functional aldehyde via one or more acetal or hemiacetal bonds;
- and
- wherein the microcapsule shell does not contain a polyamine.
Dependencies are inferred from the claim text.