Silica microcapsules and methods of preparing same
AssigneeInternational Flavors & Fragrances Inc.
InventorsJohn Brahms, Ronald Gabbard, Feng Geng, Julie Ann Wieland, Li Xu, Lewis Michael Popplewell
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Abstract
Disclosed is a microcapsule containing: (i) a microcapsule core having an active material, and (ii) a microcapsule wall formed of a first polymer and second polymer. The first polymer is a sol-gel polymer. The second polymer is gum arabic, purity gum ultra, gelatin, chitosan, xanthan gum, plant gum, carboxymethyl cellulose, sodium carboxymethyl guar gum, or a combination thereof. The weight ratio between the first and second polymer is 1:10 to 10:1. Also disclosed are processes for preparing the microcapsule and uses of the microcapsules in consumer products.
Claims4
A microcapsule comprising:
- (i) a microcapsule core containing an active material, and (ii) a microcapsule wall formed of a first polymer and second polymer, wherein the first polymer is a sol-gel polymer, the second polymer is gum arabic, purity gum ultra, gelatin, chitosan, xanthan gum, plant gum, carboxymethyl cellulose, sodium carboxymethyl guar gum, or a combination thereof, and the weight ratio between the first and second polymer is 1:10 to 10:1, wherein the microcapsule wall is single-layered containing a polymeric network of polymerized silica interlocked with a coacervate of the second polymer wherein the sol-gel polymer is a silica polymer and the second polymer is a combination of gelatin and gum Arabic, and the weight ratio between gum Arabic and gelatin is 1:5 to 5:1.
Dependencies are inferred from the claim text.