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High solvent content emulsions

a high solvent content, emulsion technology, applied in the direction of biocide, animal husbandry, pharmaceutical non-active ingredients, etc., can solve the problems of difficult application, poor sensory benefits, unenvironmental protection, etc., to enhance/improve a characteristic

Inactive Publication Date: 2013-03-28
CONOPCO INC D B A UNILEVER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about an emulsion, which includes particles, a functionalized polymer, and a solvent. The emulsion is preferably free of surfactants. The functionalized polymer can hydrogen and / or ionically bond to the particles. The emulsion has a high solvent content, meaning it has at least 20% solvent by weight. The emulsion can be used to make various end use compositions, such as skincare products, shower gels, shampoos, and deodorants. The emulsion gives a silky sensory effect. The invention is also directed to a method for treating a condition by applying the emulsion to a surface like the skin or hair. The condition can include skin pigmentation, skin hydration, skin texture, skin appearance, hair condition, etc. Overall, this patent presents a way to create a stable, high-solvent content emulsion that can be used in various products to enhance the appearance, texture, and sensory effects of surfaces.

Problems solved by technology

Moreover, use of customary emulsifiers can result in formulations that do not deliver excellent sensory benefits, are difficult to apply, and are generally not environmentally friendly.
Such emulsions are, however, known for their low water content and are not characteristically known to deliver excellent sensory and deliverability characteristics.

Method used

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  • High solvent content emulsions
  • High solvent content emulsions
  • High solvent content emulsions

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0099]All samples were made by mixing the mentioned ingredients under conditions of moderate shear, atmospheric pressure and ambient temperature.

SampleSampleSampleSampleSampleSampleSampleSampleSampleMaterials123456789Silica R805 8% 5% 2%   8%   5%  5%   5%  5%  5%Amodimethicone 72%45%18% 7.3% 4.5% 4.5% 4.5% 4.5% 4.5%(ADM 656)Lauryl 6.38% 4.05% 4.05%dimethiconeDimethicone40.5%36.45%Cyclomethicone58.32%36.45%(D5)Mineral oil40.5%Isopropyl40.5%palmitateH2020%50%80%  20%  50%  50%  50%  50%  50%Silica R805, Evonik Degussa ADM 656, Waker-BelsilSampleSampleSampleSampleSampleSampleSampleMaterials10111213141516Silica R805  5%  5% 5%  5%  5% 8%Hydrophobic 4%amino-silica(RA 200 HS)Amodimethicone 4.5% 4.5%36%(ADM 656)LauryldimethiconeDimethicone40.5%Mineral oil40.5%Caprylic acid40.5%(octanoic)Stearic acid72%Neobee CLA 8040.5%45% 4.5% 4.5%H20  50%  50%50%  50%  50%20%60%Neobee CLA80, Conjugated Linoleic Acid-Stepan Company RA 200 HS, Evonik DegussaSampleSampleSampleSampleSampleSampleSampleMateri...

example 2

[0101]The following were assessed for water diffusion rates.

Water diffusion coefficient(10−9 m2 / s) taken withMagnetic ResonanceSampleImaging T25H2O2.002126Pickering emulsion: 1.605 Fumed silica R972(8%) / cyclomethicone(72%) / H2O(20%)27Pickering emulsion: 1.684 Fumed silica R972(5%) / cyclomethicone(45%) / H2O(50%)28Silica R805 / 75.3% at 0.0106, Amodidimethicone 656 / H20(20%)23.1% at 0.070829Silica R805 / 92.8% at 0.0716, Amodidimethicone 656 / H20(50%)6.5% at 0.000079630Silica R805 / Amodidimethicone60.1% at 0.809, 656 / lauryldimethicone / 40.2% at 0.0592cyclomethicone / H20(20%)31Silica R805 / Amodidimethicone91.6% at 1.106, 656 / lauryldimethicone / 7.7% at 0.00236cyclomethicone / H20(50%)* Samples 28-31 correspond to samples 1, 2, 4 and 5 of Example 1, respectively.** Fumed silica R972 is made available by Evonik Degussa.*** Water diffusion for samples 28-31 shows multiple water diffusion rates observed. Such rates are significantly lower than those observed for conventional Pickering emulsions. The lower ...

example 3

[0102]Water-in-oil and oil-in-water compositions consistent with this invention were made by mixing the ingredients identified below.

[0103]A. Water-in-oil composition

IngredientWeight %Silica R805 2.88Amodimethicone DC 8500 2.60Silicone volatile DC 245*23.36WaterBalanceCyclopentasiloxane and dimethicone38.46crosspolymer DC 9045Glycerol 3.85*made available by Dow Corning

[0104]B. Oil-in-water composition

IngredientWeight %WaterBalanceEDTA0.05Phenoxyethanol0.40Carbopol Ultrez 21 (cross-linked0.40acrylate thickener)Xanthum gum0.10NaOH (20%)0.42Methylparaben0.20Propylparaben0.1Silica R8051.0Amodimethicone DC 85000.9Dimethicone*8.1Glycerol20.0Kobo MSP-8252.0*Mixture, 40% with viscosity of 5 centistokes and 60% with viscosity at 50 centistokes, taken at 25° C.; DC 200

[0105]Assessment of the water-in-oil and oil-in-water compositions made above and consistent with this invention revealed excellent sensory benefits after topical application to skin.

[0106]Compositions similar to the water-in-oi...

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Abstract

A high solvent content emulsion having solvent, functionalized polymer and particles having an isoelectric point below the pH of the emulsion is described. The emulsion yields excellent sensory and deliverability benefits and is suitable for use as a carrier for consumer-based end use compositions.

Description

FIELD OF THE INVENTION[0001]The present invention is directed to a high solvent content emulsion. More particularly, the present invention is directed to an emulsion comprising at least 20% by weight solvent, functionalized polymer and particles having an isoelectric point below the pH of the emulsion whereby the emulsion is suitable for use as a cosmetically acceptable vehicle that unexpectedly yields excellent sensory benefits.BACKGROUND OF THE INVENTION[0002]Emulsions are typically defined to mean heterogeneous systems which have two immiscible liquids or phases. One liquid is in dispersed form while the other forms droplets within the dispersed liquids. Emulsions can be employed as carriers for actives, especially those targeted for application to skin.[0003]It is customary to use emulsifiers in order to achieve permanent dispersion of one liquid in another. While emulsifiers are customarily used in vehicles for topical compositions, emulsifiers are linked to both allergic and n...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K8/06A61Q19/00
CPCA61K8/06A61K8/25A61K8/585A61K8/891A61K8/365A61K2800/412A61K2800/594A61Q19/00A61K8/898
Inventor ZHANG, QIQINGKHOSHDEL, EZATMOADDEL, TEANOOSHDOBKOWSKI, BRIAN JOHNZHOU, WEIZHENGYUAN, SU
Owner CONOPCO INC D B A UNILEVER