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US 11,375,714 B2Granted
Encapsulation compositions
AssigneeBattelle Memorial Institute
InventorsRamanathan S. Lalgudi, Krenar Shqau
Life of this patent
Estimating the term…
Abstract
An encapsulation composition is described. The composition comprises a plurality of capsules, each capsule comprising an amphiphilic material encapsulating a pyrethroid. The encapsulated pyrethroid has a release rate less than the release rate of the unencapsulated pyrethroid. Coated fabric products are also described.
Claims20
An encapsulated composition comprising:
- a plurality of capsules each comprising an amphiphilic material encapsulating a pyrethroid, the amphiphilic material forming micelles around the pyrethroid, wherein the amphiphilic material has hydrophilic and hydrophobic portions, and wherein the hydrophilic portion anchors the encapsulated pyrethroid and the hydrophobic portion forms a shell wall of the capsule, the encapsulated pyrethroid having a release rate less than a release rate of unencapsulated pyrethroid;
- wherein the capsules have a particle size of about 0.8 μm to about 10 μm.
An encapsulated composition coated on a fabric comprising:
- a plurality of capsules having a particle size of about 0.8 μm to about 10 μm each comprising an amphiphilic material encapsulating a pyrethroid, the amphiphilic material forming micelles around the pyrethroid, wherein the amphiphilic material has hydrophilic and hydrophobic portions, and wherein the hydrophilic portion anchors the encapsulated pyrethroid and the hydrophobic portion forms a shell wall of the capsule, and wherein the amphiphilic material is a graft copolymer, a modified N,N,N′,N′-Tetrakis(2-hydroxypropyl)ethylenediamine, a cationic nanoparticle, a diblock copolymer, a triblock copolymer, an ionic surfactant, a nonionic surfactant, a low surface energy silica, a Guerbet ester, or a poly(steatyl methacrylate-co-acrylic acid),
- wherein the composition is coated on a fabric wherein the fabric is derived from polymeric fibers or natural material;
- wherein the encapsulated pyrethroid having a release rate less than a release rate of unencapsulated pyrethroid and wherein the release rate of the encapsulated pyrethroid is such that, when the pyrethroid is coated on 1 square inch of the fabric and kept at 70° F. and 68% relative humidity, the release rate of pyrethroid is less than or equal to 6 mg/day;
- wherein the amphiphilic material has a hydrophilic-lipophilic balance within a range of from about 1 to about 20.
1 more element
Dependencies are inferred from the claim text.