A repairing composition for lowering the freezing point of essential oil and preparation method thereof

Abstract

The present invention relates to the field of cosmetics technology, specifically to a repairing composition for lowering the freezing point of essential oils and a preparation method thereof. The composition comprises slowly dripping phytosterol / octyldodecanol lauroyl glutamate into jojoba seed oil stirred at 200 rpm. The stirring speed is then reduced, sorbitan oleate is added, and the mixture is stirred until uniform. A ginseng root extract extracted with supercritical CO2 is then added to produce the repairing composition. In the present invention, the phytosterol / octyldodecanol lauroyl glutamate is slowly dripped into the stirred jojoba seed oil to form fine microspheres. The sorbitan oleate's opening-like structure then separates the microspheres, reducing the interaction between them and lowering the freezing point of wax and ester components in the oil. The ginseng root is then extracted with supercritical CO2 to extract more volatile oils and lower the freezing point of the ginseng root extract. The repairing composition not only has a lower freezing point but also simultaneously helps lower the freezing point of the essential oil to which it is added.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and in particular to a repairing composition for lowering the freezing point of essence oil and a preparation method thereof. Background Art

[0002] Essential oils contain different oils, such as esters and waxes. When these oils mix, the intermolecular forces between them raise their freezing point, causing the essential oil to solidify easily. Essential oils typically coagulate or even crystallize at temperatures between 7-10°C, causing the active ingredients to precipitate, leading to poor spreadability and reduced efficacy. Summary of the Invention

[0003] The object of the present invention is to provide a method for preparing a repair composition for lowering the freezing point of essential oil.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A method for preparing a repair composition for lowering the freezing point of an essential oil comprises dripping phytosterol / octyldodecanol lauroyl glutamate at a rate of 0.5 drops / s into jojoba seed oil stirred at 200 rpm, reducing the stirring speed, adding sorbitan oleate, stirring evenly, and adding a ginseng root extract extracted by supercritical CO2 to obtain the repair composition.

[0006] Furthermore, the stirring speed is reduced to 50 rpm before adding sorbitan oleate.

[0007] Furthermore, by weight, the jojoba seed oil comprises 30-75 parts, the phytosterol / octyldodecanol lauroyl glutamate comprises 1-10 parts, the ginseng root extract comprises 1-10 parts, and the sorbitan oleate comprises 1-10 parts.

[0008] Furthermore, the ginseng root extract is prepared by freeze-drying the ginseng root at 1-20°C for 1 hour, placing the dried ginseng root in a supercritical extraction kettle, adding CO2 into the supercritical extraction kettle, then pressurizing the supercritical extraction kettle to 15-35MPa, heating it to 20-40°C, and extracting for 2-5 hours, collecting the fractions in a distillation column at 40-60°C and 5-20MPa, to obtain the ginseng root extract.

[0009] The present invention also includes a repair composition prepared by any of the above preparation methods.

[0010] Compared with the prior art, the present invention has the following beneficial effects: the phytosterol / octyldodecanol lauroyl glutamate in the present invention is slowly dripped into jojoba seed oil under stirring at 200 rpm to form fine microspheres, and then the similar opening structure of sorbitan oleate (such as Figure 5The ginseng root extract (shown in Figure 1) separates the microspheres, reducing the interaction between them and lowering the freezing point of waxes and esters in oils. Supercritical CO2 extraction of ginseng root extract can extract more volatile oils and lower their freezing point. The repair composition of the present invention not only has a lower freezing point but also helps lower the freezing point of the essential oil to which it is added. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the state of Example Composition 1 at -15°C.

[0012] Figure 2 This is a schematic diagram of the state of comparative composition 1 at -15°C.

[0013] Figure 3 This is a schematic diagram of the state of comparative composition 2 at -15°C.

[0014] Figure 4 This is a comparison chart of the repair test results of the example essential oil and the comparison essential oil.

[0015] Figure 5 Schematic diagram of the structure of sorbitan oleate. DETAILED DESCRIPTION

[0016] The technical solutions of the present invention are further described below in conjunction with specific examples. It should be understood that the following examples are merely exemplary illustrations and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are encompassed within the scope that the present invention is intended to protect.

[0017] Example 1

[0018] The ginseng roots were placed in a freeze-dried state at 1 to -20°C for 1 hour, and the dried ginseng roots were placed in a supercritical extraction reactor;

[0019] Add CO2 into the supercritical extraction kettle, then increase the pressure of the extraction kettle to 15-35 MPa, increase the temperature to 20-40°C, and extract for 2-5 hours;

[0020] The fractions were collected in a distillation column at 40-60° C. and 5-20 MPa to obtain a ginseng root extract.

[0021] Example 2

[0022] The weight parts of the materials used in the following Example 1 and Comparative Example are shown in Table 1 below.

[0023] Example 1

[0024] Accurately weigh jojoba seed oil, and add phytosterol / octyldodecanol lauroyl glutamate dropwise at a rate of 0.5 drops / s while stirring at 200 rpm.

[0025] After all the phytosterols / octyldodecanol lauroyl glutamate were added, the stirring speed was reduced to 50 rpm, and sorbitan oleate was added under stirring.

[0026] After the addition of sorbitan oleate, the ginseng root extract prepared in Example 1 was added to prepare Example Composition 1.

[0027] Comparative Example 1

[0028] Accurately weigh jojoba seed oil, and add phytosterol / octyldodecanol lauroyl glutamate dropwise at a rate of 0.5 drops / s while stirring at 200 rpm.

[0029] After all the phytosterols / octyldodecanol lauroyl glutamate were added, the stirring speed was reduced to 50 rpm, and sorbitan oleate was added under stirring.

[0030] After the addition of sorbitan oleate, the ginseng root extract extracted by distillation was added to prepare a comparative composition 1.

[0031] Comparative Example 2

[0032] Accurately weigh jojoba seed oil, phytosterol / octyldodecanol lauroyl glutamate, and sorbitan oleate, and stir at 50 rpm until uniform.

[0033] After stirring evenly, the ginseng root extract prepared in Example 1 was added to prepare a comparative composition 2.

[0034] Table 1

[0035]

[0036] See the status of the 3 groups of compositions at -15°C. Figure 1-3 , Example composition 1 remained clear at -15°C without coagulation, while comparative composition 1 coagulated in a large area and comparative composition 2 coagulated completely.

[0037] Example 3

[0038] The weight parts of the materials used in the following application examples and comparative examples are shown in Table 2 below.

[0039] Application Examples

[0040] Murumuru palm oil was heated to 80° C. to dissolve, and Example composition 1, Limnanthes alba seed oil, isononyl isononanoate, and squalane were added with stirring at 30 rpm and stirred for 10 minutes.

[0041] The temperature was lowered to 50° C., tocopherol acetate was added, and the mixture was stirred for 3 minutes. The mixture was filtered through a 400-mesh filter cloth to obtain the essential oil.

[0042] Comparative Application Example 1

[0043] Murumuru palm oil was heated at 80° C. to dissolve, and comparative composition 1, meadowfoam seed oil, isononyl isononanoate, and squalane were added at 30 rpm and stirred for 10 minutes.

[0044] The temperature was lowered to 50° C., tocopherol acetate was added, and the mixture was stirred for 3 minutes. The mixture was filtered through a 400-mesh filter cloth to obtain a comparative essential oil.

[0045] Application Comparative Example 2

[0046] Murumuru palm oil was heated at 80°C to dissolve, and comparative component 2, meadowfoam seed oil, isononyl isononanoate, and squalane were added at 30 rpm and stirred for 10 minutes.

[0047] The temperature was lowered to 50° C., tocopherol acetate was added, and the mixture was stirred for 3 minutes. The mixture was filtered through a 400-mesh filter cloth to obtain a comparative essential oil.

[0048] Table 2

[0049]

[0050] The prepared example essential oil and comparative essential oil were subjected to stability testing. The results are shown in Table 3 below:

[0051] Table 3

[0052] Application Examples Comparative Application Example 1 Application Comparative Example 2 5℃ No solidification solidification solidification -10℃ No solidification solidification solidification -15℃ No solidification solidification solidification

[0053] 30 healthy women aged 25-60 years with positive 10% lactic acid sting test, facial TEWL value>15g / m2.h were selected for repair test of the example essence oil and the comparison essence oil. The test results are shown in Table 4 and Figure 4 .

[0054] Table 4

[0055] Application Examples Comparative Application Example 1 Application Comparative Example 2 Base Value 16.78 Base Value 16.49 Base Value 16.55 2 weeks 12.88 2 weeks 15.78 2 weeks 15.95 4 weeks 11.25 4 weeks 15.21 4 weeks 15.79

[0056] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Any modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a repair composition for lowering the freezing point of an essential oil, characterized in that: Phytosterol / octyldodecanol lauroyl glutamate was added dropwise at a rate of 0.5 drops / s to jojoba seed oil stirred at 200 rpm, the stirring speed was reduced, sorbitan oleate was added, the mixture was stirred evenly, and ginseng root extract extracted with supercritical CO2 was added to obtain a repair composition.

2. The method for preparing a repair composition for lowering the freezing point of essential oil according to claim 1, characterized in that: The stirring speed was reduced to 50 rpm before adding sorbitan oleate.

3. The method for preparing a repair composition for lowering the freezing point of essential oil according to claim 1, characterized in that: By weight, the jojoba seed oil comprises 30-75 parts, the phytosterol / octyldodecanol lauroyl glutamate comprises 1-10 parts, the ginseng root extract comprises 1-10 parts, and the sorbitan oleate comprises 1-10 parts.

4. The method for preparing a repair composition for lowering the freezing point of essential oil according to claim 1, characterized in that: The ginseng root extract is prepared by freeze-drying the ginseng root at 1-20° C. for 1 hour, placing the dried ginseng root in a supercritical extraction kettle, adding CO2 into the supercritical extraction kettle, then increasing the pressure of the supercritical extraction kettle to 15-35 MPa, heating it to 20-40° C., extracting for 2-5 hours, and collecting the fractions in a distillation column at 40-60° C. and 5-20 MPa to obtain the ginseng root extract.

5. A repair composition prepared by the preparation method according to any one of claims 1 to 4.

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