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Encapsulated essential oils

An encapsulation and essential oil technology, which can be used in microcapsule preparations, resistance to vector-borne diseases, medical raw materials derived from angiosperm subphylum, etc., can solve the problems of high cost and non-existence

Inactive Publication Date: 2006-07-19
内盖夫研发局属本古里昂大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0075] 3) In many cases, they must be used in higher than low cost doses to be effective, thus costing significantly more than currently available synthetic chemicals
[0078] 2) a class of patents based on a solid core containing essential oils absorbed inside, with and without an accompanying coating;
However, the same requirements cannot yet be met by currently available technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Using composition 1 in Table 1, essential oil microcapsules were formed by interfacial polymerization as follows: 13.5 g of isocyanate was mixed with 88 g of eucalyptus oil and added to 347 g of water containing the amines EDA and DETA using a high shear mixer . Mixing was continued at room temperature for 2 hours then the dispersant Xanthane gum [Rodopol] (1.35 g) was added to obtain a stable emulsion and the pH adjusted to 7.0 as needed. The formulation was 100% lethal to larvae of Culex pipiens after one day at 500 ppm.

Embodiment 2

[0152] Example 1 was repeated, except that Voronate M-580 was replaced by TDI [see Formulation 2 in Table 1], and the resulting microcapsules were not lethal at 500 ppm even after one day, showing that it is very important to choose materials for the manufacture of encapsulating formulations. important.

Embodiment 3

[0154] Example 2 was repeated with pine oil [see formulation 3 in Table 1]. The yield of the obtained capsules was 78%, and the average size of the capsules was 100 μm.

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Abstract

The invention provides a process for the preparation of essential oil microcapsules comprising dissolving a di- or polyisocyanate into an essential oil, emulsifying the resulting mixture in an aqueous solution containing a di- or polyamine, and / or a di or polyhydroxy compound to effect encapsulation of said essential oil through interfacial polymerization, whereby there is formed a polyurea and / or polyurethane film around the essential oil droplets which film enhances the stability of said essential oil, reduces its evaporation rate and controls its release rate when applied to a substrate.

Description

[0001] The present application relates to microcapsules of essential oils, their preparation and their use: as a green sanitizing product for the consumer market such as hard surface cleaners, laundry detergents and softeners; Use of insecticides such as larvicides; use such as repellants against eg mosquitos, ants and other insects and use as antiviral and antifungal agents. The present invention also provides a disinfectant or pesticide or insect repellent and larvicide composition comprising essential oils encapsulated in microcapsules having a capsule wall mainly composed of diisocyanate or polyisocyanate and polyfunctional Amines are optionally formed as reaction products in the presence of difunctional or polyfunctional alcohols. The present invention also provides a method for encapsulating essential oils in microcapsule formulations comprising an aqueous phase containing an emulsifier and a suspending agent: an organic phase is provided, which is an essential oil contain...

Claims

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Application Information

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IPC IPC(8): B01J13/16A61K36/18A01N25/28A61K
CPCY02A50/30
Inventor 阿里·马库斯查尔斯·林德
Owner 内盖夫研发局属本古里昂大学
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