Hygroscopic salt microencapsulation, and uses thereof
AssigneeAnimal Control Technologies (Australia) Pty Ltd
InventorLinton Staples
Life of this patent
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Abstract
The present invention relates to microencapsulation technology and specifically, nitrite salt microencapsulation and uses of microencapsulated nitrite in the manufacture of animal pest baits and toxic feed mixtures, especially baits and toxic feed mixtures to be used in humane methods for controlling pig and possum populations.
Claims20
Ethyl cellulose/linoleic acid (EC/LA) microencapsulated sodium nitrite microspheres, wherein the ratio range of ethyl cellulose to linoleic acid is in an amount from about 99:1 to about 99.99:0.01 as a % weight to weight ratio.
A bait composition for omnivorous feral animals comprising a carrier material and sodium nitrite, wherein the carrier material is a lipophilic carrier and the sodium nitrite is presented in the form of ethyl cellulose/linoleic acid microencapsulated sodium nitrite microspheres, wherein the ratio range of ethyl cellulose to linoleic acid is in an amount from about 99:1 to about 99.99:0.01 as a % weight to weight ratio.
A method of preparing a bait composition for omnivorous feral animals comprising a lipophilic carrier material and sodium nitrite, wherein the sodium nitrite is presented in the form of ethyl cellulose/linoleic acid microencapsulated sodium nitrite microspheres, wherein the ratio range of ethyl cellulose to linoleic acid is in an amount from about 99:1 to about 99.99:0.01 as a % weight to weight ratio, said method comprising:
- (a) obtaining granular sodium nitrite and optionally drying the granular sodium nitrite to constant weight, thereby indicating that substantially all moisture is removed;
- (b) encapsulating the granular sodium nitrite from step (a) with a mixture of the ethyl cellulose and linoleic acid by either pan coating or fluid bed coating techniques using a volatile organic solvent;
- and
- (c) mixing the encapsulated material with the carrier material to form the bait composition.
Dependencies are inferred from the claim text.