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Microcapsules containing active ingredients

A technology of microcapsules and active substances, which is applied in the direction of microcapsule preparations, surface active detergent compositions, and microsphere preparations, and can solve the problems of undisclosed active ingredient compositions and methods

Inactive Publication Date: 2010-10-06
INTERNATIONAL FLAVORS & FRAGRANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, U.S. Patent No. 6,303,149 does not disclose compositions and methods for releasing and thus delivering active ingredients

Method used

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  • Microcapsules containing active ingredients
  • Microcapsules containing active ingredients
  • Microcapsules containing active ingredients

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Method A: Preparation of silica capsules by direct emulsification

[0065] 12 grams of tetraethylorthosilicate (TEOS) was mixed with 140 grams of aromatic oil to form an oil phase, and the mixture was cooled in an ice bath. The fragrances are suitable for personal care applications. In a separate container, prepare 150 g of 0.5% aqueous surfactant (CTAC: cetyltrimethylammonium chloride, from Aldrich Chemical Company, Milwaukee) by dissolving the required amount of surfactant in distilled water and cooling in an ice bath , Wisconsin, USA 25% solution). The oily phase was then poured into the aqueous phase and the mixture was homogenized using a high shear mixer (Ultra Turrax T 25Basic, IKA, Werke).

[0066] Add four drops of antifoam to suppress foam formation. The pH of the system was maintained at about 3.9. The system was left at room temperature and cured for an extended period of time. The capsules formed are well dispersed and typically have particle sizes in ...

Embodiment 2

[0069] Preparation of Silica Capsules by Direct Emulsification of Higher Wall Polymer Loading

[0070] The method is carried out by using the same perfume as in Example 1 and the same method as in Example 1. However, the amount of TEOS was increased to 36 g, and the amount of flavor remained the same.

Embodiment 3

[0072] Method B: Directly emulsify the oil, then add TEOS to prepare silica capsules: 1-step post-addition method.

[0073] Step 1. Preparation of fragrance emulsion

[0074] 140g of aromatic oil was placed in a round bottom container and cooled in an ice bath. In a separate container, a 0.5% aqueous surfactant solution (150 g) was prepared by dissolving the required amount of solid surfactant in distilled water and cooling in an ice bath. The oily phase was then poured into the aqueous phase and the mixture was homogenized with a high shear mixer (Ultra Turrax T 25Basic, IKA, Werke). Add four drops of antifoam to suppress foam formation.

[0075] Step 2. Add TEOS to the fragrance emulsion.

[0076] 24 g of wall-forming TEOS were weighed out in a clean dry container and transferred to a dropping funnel. Then, drop it into the fragrance emulsion prepared in step 1 under continuous stirring. Once the TEOS has been added, the stirring speed is reduced. The system is then le...

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Abstract

The present invention relates to a microcapsule particle composition that is composed of a sol-gel material. The microcapsule particle composition is well suited for personal care and cleaning products. The invention provides a method of preparing microcapsules containing active ingredients in a core, including comprises the steps of first mixing an appropriate amount sol-gel precursor and fragrance oil, followed by cooling of the mixture obtained. The next step in the process is to prepare a surfactant solution by dissolving an appropriate amount of surfactant in water and then cooling the surfactant solution. In the next step the sol-gel precursor and fragrance oil are added to the surfactant solution and then the mixture is homogenized. A defoamer is added as needed and the mixture is allowed to cure to form the microcapsule particle composition.

Description

technical field [0001] The present invention relates to active substances encapsulated with sol-gel materials. The microcapsule particle composition is well suited for applications related to personal care and cleaning products. Background technique [0002] Aroma chemicals are used in a large number of products to enhance consumer liking for a product. Fragrance chemicals are added to consumer products such as laundry detergents, fabric softeners, soaps, stain removers, personal care products such as but not limited to shampoos, body washes, deodorants, etc., and many others. [0003] In order to enhance the efficacy of fragrances on the user, various techniques have been employed to enhance the delivery of fragrances at desired times. A widely used technique is the encapsulation of aroma substances into protective coatings. Typically, the protective coating is a polymeric material. Polymeric materials are used to protect fragrances from evaporating, reacting, oxidizing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/11A61K8/02A61K8/96A61K8/97A61K8/58A61Q5/02A61Q5/10A61Q15/00A61Q19/10C11D1/00C11D3/50C11D9/44
CPCC11D3/505B01J13/185
Inventor L·M·波波普莱韦Y·雷R·L·格雷X·黄A·N·克伦基J·J·麦克埃尔威
Owner INTERNATIONAL FLAVORS & FRAGRANCES
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