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Applications of microencapsulated essential oils

A microencapsulation and microencapsulation technology, applied in the direction of microcapsules, microcapsule preparations, applications, etc., can solve the problems that essential oil preparations are difficult to control, essential oils have poor volatility and water solubility, and are easy to oxidize.

Inactive Publication Date: 2009-04-29
BOTANOCAP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite having the most attractive properties, issues regarding the volatility of essential oils, poor water solubility and susceptibility to oxidation have become real issues which make essential oil formulations difficult to use as control systems and ultimately in the target environment

Method used

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  • Applications of microencapsulated essential oils
  • Applications of microencapsulated essential oils
  • Applications of microencapsulated essential oils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0170]Using a high shear mixer, a solution of 35 g of toluene diisocyanate (TDI) mixed with 250 g of essential oils (Table 1 ) was added to 500 g of water containing 5 g of polyvinyl alcohol (PVA). To this was added 120 ml of water with 55.6 g of polyethylene glycol (PEG) 4000. Mixing was continued for 2 hours at room temperature. The resulting emulsion was treated with 12 g of guar gum and 4 g of Nefocide. To break the hydrogel viscosity of the emulsion, 10 g of 1% sodium dodecyl sulfate (SDS) was added.

[0171] In order to evaluate its antimicrobial efficacy, particularly in the treatment of mastitis, the formulation was next tested on a variety of microorganisms.

[0172] In general, the formulation was found to be an effective antimicrobial formulation, with efficacy against all pathogens tested.

Embodiment 2

[0174] 12 g stearic acid dissolved in 100 g essential oil was added to rapidly stirred (high shear mixer) containing 2.5 g polyvinyl alcohol (PVA) in 250 ml H 2 O solution. To it, add 22.8g CaCl 2 Hexahydrate in 20ml H 2 O and stirred for 2 hours. Then, 1.5 g methylparaben, 8 ml Latron B 1956 and 3 g guar gum were added and stirring was continued for a further 2 hours.

[0175] Microcapsules containing other essential oils were similarly prepared:

[0176] 1- Tea tree oil, encapsulated in lauric acid, with CaCl 2 ;

[0177] 2- Thyme oil, encapsulated in stearic acid, with CaCl 2 ;

[0178] 3- Eucalyptus, encapsulated in stearic acid, with CaCl 2 , containing free (with free) pyrethrum and sesame oil;

[0179] 4- Oil of oregano, encapsulated in capric acid, with CaCl 2 , containing free pyrethrum and sesame oil;

[0180] 5-Tea tree oil, encapsulated in capric acid, with FeCl 2 ;

[0181] 6- Citronella oil, encapsulated in lauric acid, using MgCl 2 , containing fre...

Embodiment 3

[0202] Essential oils such as tea tree oil, eucalyptus oil, oil of oregano, essential oils obtained from thyme, essential oils obtained from herbs of the genus origanum, and other species of the Lamiaceae, Labiatae or The essential oil of the plant genus Verbenaceae was also encapsulated according to the method of Example 2.

[0203] These essential oils can also be encapsulated by interfacial polymerization as disclosed in Example 1. Mixtures of microcapsules comprising polyurethane microcapsules and polyurea microcapsules were also prepared, each microcapsule having a different release profile to give a wider range of release profiles to the formulation.

[0204] Insect Repelling and Elimination

[0205] Background - Unlike insecticides, which may only show their effectiveness after the insects are already on the target, stinging and possibly causing immediate or delayed infection, insect repellents prevent pests from flying in or touching them as well as preventing them fr...

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Abstract

A new method for the preparation of microencapsulated essential oils is disclosed. The microcapsules containing essential oils or a formulation containing thereof may be used for various non-agricultural applications.

Description

field of invention [0001] The present invention relates to microencapsulated essential oil formulations suitable for non-agricultural applications. Background of the invention [0002] In recent years, several studies have focused on the potential application of essential oils in the biological control of microorganisms and different insect pests. The essential oils degrade faster in the environment than synthetic compounds, and some have enhanced specificity for beneficial insects. Their effect against stored product insects has been extensively studied. Despite the most attractive properties, problems with essential oils' volatility, poor water solubility, and susceptibility to oxidation have become real problems that make essential oil formulations difficult to use as control systems and ultimately in the target environment. Summary of the invention [0003] It has now surprisingly been found that certain single or combined formulations comprising microencapsulated es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A23L1/22B01J13/02B01J13/16A61K8/11A61K9/50A23L27/00
CPCA01N25/28A01N37/34A01N43/40A01N43/90A01N47/18A01N47/34A01N57/16A01N65/00A01N65/08A01N65/12A01N65/28A01N65/44A01N2300/00Y02A50/30
Inventor 查尔斯·林德阿姆农·克里茨曼阿里·马库斯普尼纳·斯特龙金
Owner BOTANOCAP LTD
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