CN113712849B

CN113712849B - Spray with high skin affinity and preparation method thereof

Info

Publication number: CN113712849B
Application number: CN202110598388.XA
Authority: CN
Inventors: 王祥; 冯静静; 毛海华; 曹艳华; 李晨煜; 王文龙; 胡新成; 李维
Original assignee: Shanghai Zhongyi Daily Chemical Co ltd
Current assignee: Shanghai Zhongyi Daily Chemical Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2023-05-05
Anticipated expiration: 2041-05-31
Also published as: CN113712849A

Abstract

The invention relates to the field of cosmetics, in particular to a spray with high skin affinity and a preparation method thereof, wherein the spray with high skin affinity comprises 0.5-10wt% of surfactant, 0-4wt% of humectant and water which is added to 100wt%; the surfactant is a polyglycol modified surfactant. The spray with high skin affinity has the characteristics of low contact angle and excellent lipophilicity, and the skin affinity is obviously improved; the formula is simple, and the preparation is convenient; the spray is safe and has no irritation; the product is used as moisturizing spray in the state of skin makeup, and has better effect; the water drop hanging effect is obviously reduced, and the water drop hanging device can also be applied to the fields of glass in rainy days and the like; the spray is transparent, good in stability, good in dispersion effect, fine and uniform in water mist, easy to absorb by skin, free of split-phase phenomenon when sprayed on skin coated with squalane and other grease, free of water drops hanging on the skin, faster in permeation effect and stable for a long time.

Description

Spray with high skin affinity and preparation method thereof

Technical Field

The invention relates to the field of cosmetics, in particular to a spray with high skin affinity and a preparation method thereof.

Background

With the enhancement of aesthetic ideas, people are focusing more and more on cosmetics. Cosmetic products are products that are applied, sprayed or otherwise adhered to the surface of the skin, and currently healthy and safe skin care products are becoming more and more attractive to consumers.

Emollient and absorbent properties are fundamental requirements of all cosmetics, which relate to the affinity of the cosmetic to the skin. The improvement of skin-friendly properties of aqueous cosmetics is also a subject of continuous research in the industry. Moisture is a very promising research direction, if it can improve the affinity with skin and reduce the contact angle with skin in the presence of skin grease. At present, in order to maintain the skin moisturizing performance of most cosmetics, some components such as a surfactant and a plant extract are generally added, however, the obtained cosmetics have poor appearance, turbidity and poor stability, and have low affinity and show a beading phenomenon when being applied to the surface of the skin containing grease, so that the practicability is low.

Disclosure of Invention

In view of the problems of the prior art, a first aspect of the present invention provides a high skin substantivity spray comprising 0.5-10wt% surfactant, 0-4wt% humectant, water up to 100wt%; the surfactant is a polyglycol modified surfactant.

As a preferable technical scheme of the invention, the polymerization degree of the polyglycol in the polyglycol modified surfactant is 3-15.

As a preferable technical scheme of the invention, the polyglycol modified surfactant is selected from one or more of polyethylene glycol modified grease, polypropylene glycol modified polyether and polyglycol modified polyol surfactants.

As a preferable technical scheme of the invention, the weight ratio of the polyethylene glycol modified grease, the polypropylene glycol modified polyether and the polyglycol modified polyol surfactant is (5-8): 1: (1-5).

As a preferable technical scheme of the invention, the polyethylene glycol modified grease contains cocoate groups.

As a preferred embodiment of the present invention, the polypropylene glycol-modified polyether contains a C8-15 aliphatic branch.

As a preferable technical scheme of the invention, the polyglycol modified polyol surfactant is PEG/PPG/polytetramethylene glycol-8/5/3 glycerin.

As a preferred technical scheme of the invention, the humectant is one or more selected from polyalcohol, polyethylene glycol, sodium hyaluronate, ceramide, lactic acid, allantoin, collagen, trehalose, tremella polysaccharide, panthenol and plant extracts.

As a preferred embodiment of the present invention, the polyol comprises glycerol.

The second aspect of the invention provides a method for preparing the spray with high skin affinity, comprising the following steps: mixing surfactant, humectant and water, and stirring.

Compared with the prior art, the invention has the following beneficial effects:

the spray with high skin affinity has the characteristics of low contact angle and excellent lipophilicity, and the skin affinity is obviously improved; the formula is simple, and the preparation is convenient; the spray is safe and has no irritation; the product is used as moisturizing spray in the state of skin makeup, and has better effect; the water drop hanging effect is obviously reduced, and the water drop hanging device can also be applied to the fields of glass in rainy days and the like; the spray is transparent, good in stability, good in dispersion effect, fine and uniform in water mist, easy to absorb by skin, free of split-phase phenomenon when sprayed on skin coated with squalane and other grease, free of water drops hanging on the skin, faster in permeation effect and stable for a long time.

Drawings

FIG. 1 is a graph showing the skin-friendly effect of the spray of example 29 and example 32 of the present invention;

FIG. 2 is a graph showing the variation of contact angle of spray according to examples 29 and 33 of the present invention;

fig. 3 is a graph showing the change in contact angle after spray dilution 5-fold in examples 29 and 33 of the present invention.

Detailed Description

The present invention is illustrated by the following specific embodiments, but is not limited to the specific examples given below.

In a first aspect the present invention provides a spray with high skin substantivity comprising 0.5 to 10wt% surfactant, 0 to 4wt% humectant, water to 100wt%; the surfactant is a polyglycol modified surfactant.

In one embodiment, the high skin affinity spray further comprises 0.05 to 1wt% preservative.

Preferably, the surfactant is present in an amount of 1.65wt%.

The preservative of the present invention is not particularly limited, and may be routinely selected by those skilled in the art.

Such preservatives include, but are not limited to, phenoxyethanol, parabens, imidazolidinyl ureas, pinocembranes, bisimidazolidinyl ureas, and the like.

In one embodiment, the preservative is phenoxyethanol.

The humectant is not particularly limited and may be selected as usual by those skilled in the art.

The moisturizers include, but are not limited to, polyols, polyethylene glycol, sodium hyaluronate, ceramides, lactic acid, allantoin, collagen, trehalose, tremella polysaccharide, panthenol, plant extracts, and the like.

In one embodiment, the humectant is a polyol.

Preferably, the polyol comprises glycerol.

In one embodiment, the polyglycol in the polyglycol-modified surfactant has a degree of polymerization of 3 to 15.

Preferably, the polymerization degree of the polyglycol in the polyglycol modified surfactant is 7-13.

Preferably, the polyglycol is polyethylene glycol and/or polypropylene glycol.

In one embodiment, the polyglycol modified surfactant is selected from one or more of polyethylene glycol modified grease, polypropylene glycol modified polyether, polyglycol modified polyol surfactant.

Preferably, the weight ratio of the polyethylene glycol modified grease, the polypropylene glycol modified polyether and the polyglycol modified polyol surfactant is (5-8): 1: (1-5); more preferably 6.7:1:3.3.

preferably, the polyethylene glycol modified grease contains cocoate groups; more preferably, the polyethylene glycol modified grease is PEG-7 glycerol cocoate.

Preferably, the polypropylene glycol modified polyether contains fatty branches of C8-15; more preferably, the polypropylene glycol modified polyether is PPG-13-decyl tetradecyl polyether-24.

Preferably, the polyglycol modified polyol surfactant is PEG/PPG/polytetramethylene glycol-8/5/3 glycerin.

In one embodiment, the preservative includes, but is not limited to, phenoxyethanol, parabens, imidazolidinyl ureas, pinus, bisimidazolidinyl ureas, and the like.

According to the theory of colloid interfacial chemistry, the applicant adds a surfactant into the aqueous spray to reduce the interfacial tension of water and oil phases, but the applicant finds that the surfactant does not have a good effect, the phenomenon of hanging water drops on the skin of the spray is obvious, and the spray is layered, turbid and opaque, so that a commercial product cannot be formed.

Furthermore, the applicant has unexpectedly found that in the particular spray humectant system herein, polyglycol modified surfactants, in particular PEG-7 glycerol cocoate, PPG-13-decyltetradecylether-24 and PEG/PPG/polytetramethylene glycol-8/5/3 glycerol are added in a weight ratio of (5-8): 1: in the case of (1-5), the spray obtained at this time is not only transparent and stable, but also is free from water drops when applied to the skin surface containing squalane, and is fast in absorption, good in skin-friendly property and low in contact angle, and the applicant believes that the specific polymerization degree and specific length of the branched chain in the present application enable the spray to spread on the squalane-containing surface, and that the compatibility and dispersibility between 3 specific surfactants in the spray system are good, and the transparent stable system is maintained for a long time.

Examples

Hereinafter, the present invention will be described in more detail by way of examples, but it should be understood that these examples are merely illustrative and not limitative. The raw materials used in the following examples are all commercially available, unless otherwise specified.

Examples 1 to 32

Examples 1-32 of the present invention provide a spray having the following composition: glycerin 2wt%, surfactant, phenoxyethanol 0.5wt%, water up to 100wt%.

The types and contents of the surfactants in examples 1 to 32 are shown in Table 1.

TABLE 1

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The appearance and use of the high skin affinity sprays obtained in examples 1-32 are shown in Table 2.

TABLE 2

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From the test results of table 2, it can be seen that the surfactant has unique skin-friendly effect advantage in the present application, and the effect diagram is shown in fig. 1.

Fig. 1 usage and description: the back of the hand was first coated with a 100wt% pure grease (squalane) and then sprayed with the spray sample. The right hand side of fig. 1 shows the effect of the high skin affinity spray of example 29. The left hand in fig. 1 is a graph of the effect of the spray of example 32 of the present application.

The spray of examples 1-28, 30-32 was prepared by: adding surfactant into water, stirring and heating to 75deg.C, cooling to 42deg.C, adding the rest materials, stirring, and cooling to 32deg.C.

The spray of example 29 was prepared by: adding PEG-7 glycerol cocoate into water, stirring and heating to 75 ℃, cooling the system to 42 ℃, adding the rest raw materials, stirring uniformly, and cooling the system to 32 ℃ to obtain the product.

Example 33

Example 33 of the present invention provides a spray, the specific embodiment of which is the same as example 29, except that the PEG-7 glycerol cocoate content of the surfactant is 0.

The preparation method of the spray comprises the following steps: adding the raw materials at a temperature of 42 ℃, stirring uniformly, and cooling the system to 32 ℃ to obtain the product.

The contact angle measurements were carried out on the sprays of example 29 and example 33, respectively, using a contact angle measuring instrument of model DSA20 from Kruss, germany, and the test results are shown in Table 3.

TABLE 3 Table 3

The resulting graph of contact angle change is shown in figure 2.

The contact angle test was performed again by the same method by diluting the spray of example 29 and example 33 5 times, respectively, and the results are shown in table 4 and fig. 3.

TABLE 4 Table 4

From tables 3 and 4 and fig. 2-3, it can be seen that the spray in this application has higher skin-friendly properties, very small contact angle, visually has a unique effect of no water droplet hanging, and the contact angle is particularly significantly reduced, which is demonstrated theoretically and experimentally.

The foregoing examples are illustrative only and serve to explain some features of the method of the invention. The appended claims are intended to claim the broadest possible scope and the embodiments presented herein are merely illustrative of selected implementations based on combinations of all possible embodiments. It is, therefore, not the intention of the applicant that the appended claims be limited by the choice of examples illustrating the features of the invention. Some numerical ranges used in the claims also include sub-ranges within which variations in these ranges should also be construed as being covered by the appended claims where possible.

Claims

1. A spray with high skin affinity, characterized by comprising 0.5-10wt% of surfactant, 0-4wt% of humectant and water to 100wt%; the surfactant is 60wt% of PEG-7 glycerol cocoate, 9wt% of PPG-13-decyl tetradecyl polyether-24 and 31wt% of PEG/PPG/polytetramethylene glycol-8/5/3 glycerol.

2. The high skin substantive spray of claim 1, wherein the moisturizing agent is selected from one or more of polyols, sodium hyaluronate, ceramides, lactic acid, allantoin, collagen, trehalose, panthenol, plant extracts.

3. The high skin substantive spray of claim 2, wherein the polyhydric alcohol comprises glycerin.

4. A method of preparing a high skin substantivity spray according to any one of claims 1 to 3, comprising: mixing surfactant, humectant and water, and stirring.