CN107233220B - Alcohol-based sunscreen oil and preparation method thereof - Google Patents

Abstract

The invention discloses alcohol-based sunscreen oil and a preparation method thereof, wherein the alcohol-based sunscreen oil comprises the following components in percentage by weight: 1.0-30.0% of sun-screening agent, 1.0-10.0% of water-resisting agent, 10.0-50.0% of grease, 1.0-20.0% of polyalcohol and 10.0-87.0% of ethanol, wherein the sum of the weight percentages of all the components of the alcohol-based sun-screening oil is 100%. The invention adopts ethanol as the substrate of the sunscreen oil, simplifies the preparation process of sunscreen products, and the non-emulsified sunscreen oil prepared by adjusting the proportion of the alcohol phase and the oil phase not only has higher sunscreen index and long-wave ultraviolet protection index, but also has better waterproof performance and excellent sensory experience.

Description

Alcohol-based sunscreen oil and preparation method thereof

Technical Field

The invention belongs to the field of cosmetics, and relates to alcohol-based sunscreen oil and a preparation method thereof.

Background

Ultraviolet rays in sunlight are electromagnetic waves having a wavelength shorter than that of visible light. The ultraviolet rays absorbed by the skin can damage DNA, thereby generating wrinkles, resulting in sunburn, cataract, skin cancer, even vision damage, immune system damage and other diseases. According to different actions of ultraviolet rays on organisms, the ultraviolet rays are medically divided into different wave bands: the wavelength of 320-400nm is the UVA wave band, and ultraviolet rays in the wave band have strong penetrating power and can directly reach the dermis layer of the skin to damage elastic fibers and collagen fibers, so that the skin is tanned and wrinkles are generated; the wavelength of 280-320nm is UVB wave band, ultraviolet rays in the wave band have erythema effect on human bodies, and long-term or excessive irradiation can cause skin to be suntan and cause red swelling and desquamation. In recent years, with the increasing awareness of people about ultraviolet protection, people have attracted public attention to skin sunscreen, and people have increasingly demanded sunscreen cosmetics.

Sunscreen cosmetic is a cosmetic added with sunscreen agent capable of blocking or absorbing ultraviolet rays to prevent skin from suntan and sunburn. Sunscreen cosmetics are various in types, and are generally classified into emulsion type and non-emulsion type in terms of formulation. At present, most of sunscreen products on the market at home are emulsified, and sunscreen cream, sunscreen milk, sunscreen gel and the like are common.

201210377396.2 discloses a nonirritating sunscreen cream and its preparation method, wherein the sunscreen cream contains sunscreen agents and additives, has good compatibility with skin, and has strong ability to resist ultraviolet rays. However, the preparation process of the emulsified sunscreen cream is complex, and firstly, a physical sunscreen agent and a chemical sunscreen agent are required to be fully mixed with grease respectively, and the mixture is pumped into an emulsifying pot after being completely dispersed, and is heated to 80-85 ℃; then completely dissolving water phase materials such as deionized water, butanediol and the like at the temperature of 80-85 ℃, and slowly pumping the materials into an emulsifying pot through a filter screen for emulsification; emulsifying for 30-45min, stopping homogenizing, cooling with circulating water, and vacuum defoaming; and finally, sequentially adding the additive, the preservative and the essence in the cooling process, and discharging. The base of the sunscreen cream is a water phase, so that in order to ensure that the hydrophobic sunscreen agent and the grease are fully dissolved in the deionized water, a complex emulsification process is needed, so that hydrogen bonds of water molecules are connected with oil molecules to form a relatively stable emulsification structure, the stability of the sunscreen cream is maintained, and a sunscreen function is played.

To simplify the manufacturing process of sunscreen creams, 201280016439.2 discloses a sunscreen composition and method comprising an alcohol soluble polymer and a chemical sunscreen agent, the sunscreen composition being made on an ethanol base, avoiding the complex emulsification process, by merely dispersing the UV absorber in ethanol, and adding the silicone and fragrance, and mixing by an overhead mixer until sufficiently dissolved to a clear solution. However, the solubility of the polymer in alcohol groups is low, and the use concentration of the polymer is limited to 0.5 to 7% by weight in order to obtain a clear solution, and even when used in combination with a chemical type sunscreen agent, the sunscreen effect is still weak.

Sunscreen oil is a typical representative of non-emulsified sunscreen products, is popular in European and American areas, and is not favored by consumers at home, because the traditional sunscreen oil is generally an oil agent, has outstanding waterproof and sweat-resistant effects, but has thick and greasy skin feel, which is unacceptable for Asians who seek fresh, moist skin feel.

201010570891.6 discloses a sunscreen oil, which contains dimethyl silicone oil, vaseline, olive oil, benzyl salicylate and peppermint oil, is a non-emulsified sunscreen product, has simple preparation process, good water resistance and easy spreading, but the sunscreen oil components are grease components, are sticky and heavy, have poor water replenishing and moisture retaining properties, and are easy to cause skin pore blockage.

201510947666.2 discloses a refreshing, low irritation sunscreen oil and its preparation method, wherein the sunscreen oil contains polydimethylsiloxane, olive oil, rose hip oil, shea butter, tocopherol acetate, octyl p-methoxycinnamate, menthol anthranilic acid and mint essential oil, however, the refreshing property of the sunscreen oil mainly comes from the refreshing feeling brought by the mint essential oil, and is not a true refreshing and low-sensitivity formula, therefore, the sunscreen oil is also easy to cause the skin pore to be blocked and generate acne.

Therefore, it is very important to develop a sunscreen oil which can prevent sunlight and water and has fresh, moist and skin-moistening feeling.

Disclosure of Invention

In order to solve the problems, the invention provides the alcohol-based sunscreen oil and the preparation method thereof, the sunscreen oil takes ethanol as a substrate, is clear and transparent, has strong sunscreen and waterproof capabilities, has fresh skin feel, has a good moisturizing effect due to the introduction of an alcohol phase, and has a good market prospect.

In a first aspect, the invention provides alcohol-based sunscreen oil, which comprises the following components in percentage by weight: 1.0-30.0% of sun-screening agent, 1.0-10.0% of water-resisting agent, 10.0-50.0% of grease, 1.0-20.0% of polyalcohol and 10.0-87.0% of ethanol, wherein the sum of the weight percentages of all the components of the alcohol-based sun-screening oil is 100%.

The invention adopts ethanol as the substrate of the sunscreen oil, and the ethanol has the advantages that the ethanol has good compatibility with the sunscreen agent, the water repellent agent, the oil and the polyhydric alcohol in the sunscreen oil compared with deionized water, a complicated emulsification process is not needed during preparation, the preparation process of the sunscreen product is simplified, and the non-emulsified sunscreen oil prepared by adjusting the proportion of the alcohol phase and the oil phase not only has higher sunscreen index and long-wave ultraviolet protection index, but also has better waterproof performance and excellent sensory experience.

Preferably, the weight percentage of the sunscreen agent is 1.0-30.0%, for example, 1.0%, 2.0%, 5.0%, 8.0%, 10.0%, 15.0%, 20.0%, 22.0%, 25.0%, 28.0% or 30.0%, preferably 15-20%, and more preferably 16.0-19.0%.

Preferably, the water repellent agent is 1.0-10.0% by weight, for example, 1.0%, 2.0%, 3.0%, 4.0%, 5.0%, 6.0%, 7.0%, 8.0%, 9.0% or 10.0%, preferably 3.0-5.0%.

The weight percentage of the fat or oil is preferably 10.0 to 50.0%, and may be, for example, 10.0%, 15.0%, 20.0%, 25.0%, 30.0%, 35.0%, 40.0%, 45.0%, or 50.0%, preferably 20.0 to 40.0%, and more preferably 25.0 to 40.0%.

Preferably, the weight percentage of the polyol is 1.0-20.0%, for example, 1.0%, 2.0%, 5.0%, 8.0%, 10.0%, 12.0%, 15.0%, 18.0% or 20.0%, preferably 5.0-20.0%.

Preferably, the ethanol is present in a weight percentage of 10.0 to 87.0%, for example 10.0%, 15.0%, 20.0%, 25.0%, 30.0%, 35.0%, 40.0%, 45.0%, 50.0%, 55.0%, 60.0%, 65.0%, 70.0%, 75.0%, 80.0%, 85.0% or 87.0%, preferably 25.0 to 50.0%.

Preferably, the alcohol-based sunscreen oil comprises the following components in percentage by weight: 15.0-20.0% of sun-screening agent, 3.0-5.0% of water-resisting agent, 20.0-40.0% of grease, 5.0-20.0% of polyalcohol and 25.0-50.0% of ethanol, wherein the sum of the weight percentages of all the components of the alcohol-based sun-screening oil is 100%.

Preferably, the alcohol-based sunscreen oil comprises the following components in percentage by weight: 16.0-19.0% of sun-screening agent, 3.0-5.0% of water-resisting agent, 25.0-40.0% of grease, 5.0-20.0% of polyalcohol and 25.0-50.0% of ethanol, wherein the sum of the weight percentages of all the components of the alcohol-based sun-screening oil is 100%.

Preferably, the alcohol-based sunscreen oil further comprises, in weight percent, cosmetic additives 0.1-0.5%, such as 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, or 0.5%, preferably 0.4%.

Preferably, the alcohol-based sunscreen oil comprises the following components in percentage by weight: 19.0% of sun-screening agent, 5.0% of water repellent agent, 39.0% of grease, 10.0% of polyalcohol, 0.4% of cosmetic additive and 26.6% of ethanol.

Preferably, the sunscreen comprises any one or a combination of at least two of 4-methylbenzylidene camphor, butyl methoxydibenzoyl methane, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, benzophenone-4, ethylhexyl salicylate, octocrylene, hexyl diethylaminooxybenzoyl benzoate, or isoamyl p-methoxycinnamate, for example, 4-methylbenzylidene camphor, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, octocrylene, hexyl diethylaminooxybenzoyl benzoate, and isoamyl p-methoxycinnamate, butyl methoxydibenzoyl methane, ethylhexyl methoxycinnamate, benzophenone-4, and isoamyl p-methoxycinnamate, A combination of ethylhexyl salicylate, hexyl diethylaminobenzoyl benzoate and isoamyl p-methoxycinnamate, a combination of ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl salicylate, octocrylene, hexyl diethylaminobenzoyl benzoate and isoamyl p-methoxycinnamate, a combination of 4-methylbenzylidene camphor and ethylhexyl salicylate, a combination of 4-methylbenzylidene camphor, butyl methoxydibenzoylmethane, benzophenone-4, ethylhexyl salicylate, octocrylene and isoamyl p-methoxycinnamate, a combination of butyl methoxydibenzoylmethane, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, benzophenone-4, ethylhexyl salicylate, hexyl diethylaminobenzoyl benzoate and isoamyl p-methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, benzophenone-4, ethylhexyl salicylate, octocrylene, the combination of diethylaminooxybenzoyl hexyl benzoate and isoamyl p-methoxycinnamate, or the combination of bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl salicylate, preferably the combination of 4-methylbenzylidenecamphor, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, octocrylene, diethylaminooxybenzoyl hexyl benzoate and isoamyl p-methoxycinnamate.

Preferably, the water repellent agent comprises any one of or a combination of at least two of hydrogenated dilinoleic acid carbonate/dimethyl carbonate copolymer, trimethylsiloxysilicate/dimethiconol cross-linked polymer, VP/hexadecene copolymer, or VP/eicosene copolymer, which may be, for example, a combination of hydrogenated dilinoleic acid carbonate/dimethyl carbonate copolymer and VP/hexadecene copolymer, a combination of trimethylsiloxysilicate/dimethiconol cross-linked polymer and VP/eicosene copolymer, a combination of hydrogenated dilinoleic acid carbonate/dimethyl carbonate copolymer, trimethylsiloxysilicate/dimethiconol cross-linked polymer and VP/hexadecene copolymer, or a combination of VP/hexadecene copolymer and VP/eicosene copolymer, preferably a combination of hydrogenated dimer linoleyl carbonate/dimethyl carbonate copolymer and VP/hexadecene copolymer.

Preferably, the oil or fat comprises coconut oil, olive oil, sweet almond oil, seabuckthorn fruit oil, any one or a combination of at least two of di-C12-13 alcohol malate, C12-15 alcohol benzoate, octyldodecanol myristate, dioctyl carbonate, caprylic/capric triglyceride, cetyl ethylhexanoate or pentaerythritol tetraisostearate, such as coconut oil, C12-15 alcohol benzoate, dioctyl carbonate and pentaerythritol tetraisostearate, olive oil, sweet almond oil, octyldodecanol myristate, dioctyl carbonate and pentaerythritol tetraisostearate, seabuckthorn fruit oil, di-C12-13 alcohol malate, C12-15 alcohol benzoate, caprylic/capric triglyceride and cetyl ethylhexanoate, seabuckthorn fruit oil, A combination of C12-15 alcohol benzoate and cetyl ethylhexanoate, a combination of coconut oil, olive oil, di-C12-13 alcohol malate and C12-15 alcohol benzoate, a combination of sweet almond oil, seabuckthorn oil, octyldodecanol myristate and caprylic/capric triglyceride, a combination of olive oil, seabuckthorn oil, caprylic/capric triglyceride, cetyl ethylhexanoate and pentaerythritol tetraisostearate, or a combination of di-C12-13 alcohol malate, C12-15 alcohol benzoate, octyldodecanol myristate, dicaprylyl carbonate, caprylic/capric triglyceride, cetyl ethylhexanoate and pentaerythritol tetraisostearate, preferably a combination of coconut oil, C12-15 alcohol benzoate, dicaprylyl carbonate and pentaerythritol tetraisostearate.

Preferably, the polyhydric alcohol comprises any one of or a combination of at least two of glycerol, propylene glycol, butylene glycol, dipropylene glycol, polyethylene glycol-8 or octyldodecanol, which may be, for example, a combination of glycerol, propylene glycol and octyldodecanol, a combination of butylene glycol, polyethylene glycol-8 and octyldodecanol, a combination of glycerol, dipropylene glycol and polyethylene glycol-8, a combination of glycerol, propylene glycol and butylene glycol, a combination of propylene glycol, butylene glycol and dipropylene glycol, a combination of butylene glycol, dipropylene glycol and polyethylene glycol-8, or a combination of glycerol and polyethylene glycol-8, preferably a combination of glycerol, propylene glycol and octyldodecanol.

Preferably, the cosmetic additive comprises any one of or a combination of at least two of tocopheryl acetate, ascorbyl tetraisopalmitate or perfume, which may be, for example, a combination of tocopheryl acetate and ascorbyl tetraisopalmitate, a combination of ascorbyl tetraisopalmitate and perfume, a combination of tocopheryl acetate, ascorbyl tetraisopalmitate and perfume, preferably a combination of tocopheryl acetate, ascorbyl tetraisopalmitate and perfume.

In a second aspect, the invention provides a preparation method of alcohol-based sunscreen oil, which comprises the following steps:

(1) adding the sun-screening agent and the water-resisting agent into the grease, heating and dissolving uniformly to obtain an oil phase for later use;

(2) stirring and mixing the polyhydric alcohol and the ethanol uniformly at normal temperature to obtain an alcohol phase for later use;

(3) and slowly adding the alcohol phase into the oil phase at a constant speed under the conditions of normal temperature and stirring, and stirring and mixing uniformly.

In the method, the heating temperature in step (1) may be capable of dissolving the sunscreen agent and the water repellent agent added to the oil, and is not particularly limited, and may be appropriately adjusted by those skilled in the art according to actual circumstances, and the heating temperature selected in the present application is 60 to 80 ℃, for example, 60 ℃, 62 ℃, 63 ℃, 65 ℃, 68 ℃, 70 ℃, 72 ℃, 73 ℃, 75 ℃, 78 ℃ or 80 ℃, preferably 65 to 75 ℃, and more preferably 70 ℃.

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

(1) the preparation process is simple: ethanol is used as a substrate of the sunscreen oil, and a complex emulsification process is not required during preparation, so that the preparation process of the sunscreen product is simplified;

(2) the sun-screening performance is excellent: by optimizing the addition amount of the sun-screening agent, the SPF value of the prepared sun-screening oil is more than 20 and up to 33.8, the PFA value is more than + + and up to 8.7(PA + + +), the use is safe, and the skin cannot be damaged;

(3) the waterproof performance is excellent: by adding a proper amount of waterproof agent, the SPF value of the prepared sunscreen oil is only slightly reduced before and after bathing, and the SPF value of the sunscreen oil with the optimal formula after bathing can still reach 29.8, which is larger than the SPF value of the sunscreen products of the same type before bathing;

(4) the use feeling is good: more than 50% of the subjects consider the whole use feeling of the sunscreen oil prepared by the invention to be better, and have unusual performances in the aspects of refreshment, smearing, mildness and comfort, for the sunscreen oil product with the optimal formula, 75% of the subjects consider the sunscreen oil product to be fresh and not greasy, 65% of the subjects consider the sunscreen oil product to be convenient to smear, 55% of the subjects consider the sunscreen oil product to be mild and not irritant, and 60% of the subjects consider the sunscreen oil product to be comfortable to use.

Detailed Description

To further illustrate the technical means and effects of the present invention, the present invention is further described with reference to the following examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.

The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or apparatus used are conventional products commercially available from normal sources, not indicated by the manufacturer.

Example 1 alcohol-based sunscreen oil (I)

The formulation is shown in Table 1.

TABLE 1

The preparation method comprises the following steps:

(1) heating and dissolving the component A uniformly at 70 ℃;

(2) stirring and mixing the component B uniformly at normal temperature;

(3) slowly adding the component B into the component A at a constant speed under the condition of stirring at normal temperature, and uniformly mixing;

(4) and adding the component C into the mixed system, and uniformly mixing.

Example 2 alcohol-based sunscreen oil (II)

The formulation is shown in Table 2.

TABLE 2

The preparation method is the same as example 1.

Example 3 alcohol-based sunscreen oil (III)

The formulation is shown in Table 3.

TABLE 3

The preparation method is the same as example 1.

Example 4 alcohol-based sunscreen oil (IV)

The formulation is shown in Table 4.

TABLE 4

The preparation method comprises the following steps:

(1) heating and dissolving the component A uniformly;

(2) stirring and mixing the component B uniformly at normal temperature;

(3) and slowly adding the component B into the component A at a constant speed under the condition of stirring at normal temperature, and uniformly mixing.

Example 5 alcohol-based sunscreen oil (V)

The formulation is shown in Table 5.

TABLE 5

The preparation method is the same as example 4.

Example 6 alcohol-based sunscreen oil (VI)

The formulation is shown in Table 6.

TABLE 6

The preparation method is the same as example 4.

Example 7 alcohol-based sunscreen oil (VII)

The formulation is shown in Table 7.

TABLE 7

The preparation method is the same as example 1.

Example 8 alcohol-based sunscreen oil (VIII)

The formulation is shown in Table 8.

TABLE 8

The preparation method is the same as example 1.

Comparative example 1

The ethanol solvent was replaced with an equal amount of deionized water as compared to example 1.

The preparation method comprises the following steps:

(1) sequentially adding 4-methylbenzylidene camphor, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, octocrylene, diethyl amino oxybenzoyl hexyl benzoate, p-methoxycinnamic acid isoamyl ester, grease, water repellent agent and other oil phase materials into an oil phase pot, stirring and heating to 80-85 ℃, and pumping into an emulsifying pot after complete dispersion;

(2) adding deionized water, polyhydric alcohol and other water phase materials into a water phase pot, stirring and heating to 80-85 ℃, and taking the condition that the water phase is completely dissolved as the standard;

(3) slowly pumping the materials in the water phase pot into an emulsifying pot through a filter screen for emulsification, stopping homogenizing after emulsification for 30-45 minutes, cooling by circulating water, and keeping vacuum defoaming;

(4) cooling to 45 deg.C, adding additive, stirring, and cooling to 38 deg.C.

Comparative example 2

The formulation is shown in Table 9, in comparison with example 1.

TABLE 9

Comparative example 3

The formulation is shown in Table 10, in comparison with example 1.

Watch 10

Comparative example 4

The formulation is shown in Table 11, in comparison with example 1.

TABLE 11

Sun protection factor (SPF value) and Long-wave ultraviolet protection factor (PFA value) tests

The examples and comparative examples of the present invention were tested for sun protection factor (SPF value) and long wave uv protection factor (PFA value) according to the determination methods of sun protection factor (SPF value) and long wave uv protection factor (PFA value) in the cosmetic safety specification on the 2015 edition.

Sun protection factor (SPF value) determination method: 10 healthy volunteer subjects of 18-60 years old, both male and female, were selected. Selecting 5 points on the back of a subject to be irradiated by ultraviolet rays with different doses, and taking the lowest irradiation dose or the shortest irradiation time for the skin to appear erythema as the minimum erythema dose MED of the normal skin of the subject. The test product was also applied uniformly to the test area of the skin of the subject in an amount of (2.00. + -. 0.05) mg/cm²After waiting for 15-30 minutes, 5 points are irradiated by ultraviolet rays with different doses, and the MED of the skin of the subject under the product protection is determined as the lowest irradiation dose or the shortest irradiation time when the skin of the subject has erythema. The SPF value of the test product to the subject was calculated using the formula:

individual SPF ═ MED of sample protected skin/MED of unprotected skin

Method for measuring long-wave ultraviolet protection index (PFA value): 10 healthy volunteer subjects of 18-60 years old, both male and female, were selected. Selecting an irradiation area on the back of a subject, irradiating the irradiation area with ultraviolet rays with the wavelength of 320-400nm, wherein the minimum ultraviolet irradiation dose or the minimum irradiation time required for the slight blackening to appear on the skin of the whole irradiation part after 2-4 hours of irradiation is the minimum continuous blackening MPPD of the normal skin of the subject. The test product is accurately and uniformly applied to the skin of the subject in an actual use mode, and the dosage is (2.00 +/-0.05) mg/cm²And after waiting for 15-30 minutes, irradiating by using ultraviolet rays with the wavelength of 320-400nm, and taking the minimum ultraviolet irradiation dose or the minimum irradiation time for the skin to be blackened as the MPPD of the skin of the subject under the product protection. The PFA value of the test sample to the subject was calculated using the formula:

individual PFA is MPPD of sample protective skin/MPPD of non protective skin

Test of Water resistance

The examples of the present invention and the comparative examples were subjected to a test for water resistance according to the method for measuring water resistance of sunscreen cosmetics in the cosmetic safety specification of the 2015 edition.

The determination method comprises the following steps: 10 healthy volunteer subjects of 18-60 years old, both male and female, were selected. Applying sunscreen on the tested part of the subject, waiting for 15-30 minutes, allowing the subject to perform moderate activity in water for 20 minutes or rotating the water flow for 20 minutes at moderate degree, allowing the subject to rest for 20 minutes after water outlet, allowing the subject to perform moderate activity in water for 20 minutes, and finishing the activity in water. After the skin was allowed to dry, measurement of SPF value and measurement of PFA value were performed.

Sensory evaluation test

In order to evaluate the effect of the sunscreen oil of the present invention, 20 healthy volunteers were selected for sensory evaluation tests using the inventive and comparative samples as test samples, and the test values indicated the number of volunteers who approved the corresponding products.

The sunscreen properties, water repellency, and feeling of use of the sunscreen oil products in each example and comparative example are shown in table 12.

TABLE 12 sunscreen, Water repellency, and feel of use of sunscreen oils

From the comparison of examples 1-8, the optimum sunscreen performance is achieved when the sunscreen oil comprises, in weight percent, 19.0% sunscreen agent, 5.0% water repellent agent, 39.0% oil, 10.0% polyol, 0.4% cosmetic additive, and 26.6% ethanol: SPF 33.8, PFA 8.7(PA + + +); best water resistance: compared with the SPF value after bath before bath, the SPF value is only reduced by 11.8 percent, and the SPF value after bath can still reach higher 29.8; good feeling of use: the skin feel is fresh and cool, the smearing is easy, the skin feel is mild and non-irritating, the comfort is good, the overall evaluation is highest in similar products, and 70% of subjects consider that the overall use feeling of the sunscreen oil is good.

Compared with example 1, in comparative example 1, deionized water is used as a solvent, however, because water has poor compatibility with sunscreen agents, waterproofing agents and grease, the oil phase material needs to be dispersed into tiny emulsion droplets in the preparation process, the solubility of the oil phase material in water is increased, and the process is complicated; in addition, the prepared sunscreen product is unstable, is easily separated into an oil layer and a water layer, and needs to be shaken well before use, otherwise, the sunscreen effect cannot be achieved, and the use feeling is poor.

Compared with example 1, the sunscreen oil of comparative example 2 has a further increased ethanol content, requires refreshing property but has poor mildness, can damage skin after use, and has low sunscreen and waterproofing agent content, an SPF value of less than 15, a PFA value of only 1.7(PA +), and poor sunscreen and waterproofing performance; compared with the alcohol phase, the oil phase content in the comparative example 3 is far greater than that of the alcohol phase, the pore is easily blocked to generate acne by using greasiness, and meanwhile, the sun-proof and waterproof performances are poor; comparative example 4 has a ratio of oil to ethanol close to 1:1, but the sunscreen content is too high, which also causes skin damage by direct contact with the skin and is less mild.

In conclusion, compared with the similar sunscreen products, the alcohol-based sunscreen oil prepared by the invention has the following advantages:

(1) the preparation process is simple: ethanol is used as a substrate of the sunscreen oil, and a complex emulsification process is not required during preparation, so that the preparation process of the sunscreen product is simplified;

(2) the sun-screening performance is excellent: by optimizing the addition amount of the sun-screening agent, the SPF value of the prepared sun-screening oil is more than 20 and up to 33.8, the PFA value is more than + + and up to 8.7(PA + + +), the use is safe, and the skin cannot be damaged;

(3) the waterproof performance is excellent: by adding a proper amount of waterproof agent, the SPF value of the prepared sunscreen oil is only slightly reduced before and after bathing, and the SPF value of the sunscreen oil with the optimal formula after bathing can still reach 29.8, which is larger than the SPF value of the sunscreen products of the same type before bathing;

(4) the use feeling is good: more than 50% of the subjects consider the whole use feeling of the sunscreen oil prepared by the invention to be better, and have unusual performances in the aspects of refreshment, smearing, mildness and comfort, for the sunscreen oil product with the optimal formula, 75% of the subjects consider the sunscreen oil product to be fresh and not greasy, 65% of the subjects consider the sunscreen oil product to be convenient to smear, 55% of the subjects consider the sunscreen oil product to be mild and not irritant, and 60% of the subjects consider the sunscreen oil product to be comfortable to use.

The applicant states that the present invention is illustrated in detail by the above examples, but the present invention is not limited to the above detailed methods, i.e. it is not meant that the present invention must rely on the above detailed methods for its implementation. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims (7)

1. The alcohol-based sunscreen oil is characterized by comprising the following components in percentage by weight: 16.0-19.0% of sun-screening agent, 3.0-5.0% of water repellent agent, 25.0-40.0% of grease, 5.0-20.0% of polyalcohol, 0.1-0.5% of cosmetic additive and 25.0-50.0% of ethanol, wherein the sum of the weight percentages of all the components of the alcohol-based sun-screening oil is 100%;

the sunscreen agent comprises any one or the combination of at least two of 4-methylbenzylidene camphor, butyl methoxy dibenzoyl methane, ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, benzophenone-3, benzophenone-4, ethylhexyl salicylate, octocrylene, diethylamino oxybenzoyl hexyl benzoate or p-methoxy isoamyl cinnamate;

the water repellent agent comprises any one or combination of at least two of hydrogenated dimer linoleyl carbonate/dimethyl carbonate copolymer, trimethylsiloxy silicate/dimethiconol cross-linked polymer, VP/hexadecene copolymer or VP/eicosene copolymer.

2. The alcohol-based sunscreen according to claim 1, wherein the cosmetic additive is 0.4% in the alcohol-based sunscreen.

3. The alcohol-based sunscreen oil according to claim 1, comprising by weight: 19.0% of sun-screening agent, 5.0% of water repellent agent, 39.0% of grease, 10.0% of polyalcohol, 0.4% of cosmetic additive and 26.6% of ethanol.

4. The alcohol-based sunscreen oil according to claim 1, wherein said oil comprises any one of coconut oil, olive oil, sweet almond oil, sea buckthorn oil, di-C12-13 alcohol malate, C12-15 alcohol benzoate, octyl dodecanol myristate, dioctyl carbonate, caprylic/capric triglyceride, cetyl ethylhexanoate, or pentaerythritol tetraisostearate, or a combination of at least two thereof.

5. The alcohol-based sunscreen according to claim 1 wherein said polyhydric alcohol comprises any one or a combination of at least two of glycerin, propylene glycol, butylene glycol, dipropylene glycol, polyethylene glycol-8, or octyldodecanol.

6. The alcohol-based sunscreen according to claim 1 wherein said cosmetic additive comprises any one or a combination of at least two of tocopheryl acetate, ascorbyl tetraisopalmitate or perfume.

7. A process for the preparation of an alcohol based sunscreen as claimed in any of claims 1 to 6 comprising the steps of:

(1) adding the sun-screening agent and the water-resisting agent into the grease, heating and dissolving uniformly to obtain an oil phase for later use;

(2) stirring and mixing the polyhydric alcohol and the ethanol uniformly at normal temperature to obtain an alcohol phase for later use;

(3) and slowly adding the alcohol phase into the oil phase at a constant speed under the conditions of normal temperature and stirring, and stirring and mixing uniformly.