CN116059134B

CN116059134B - Make-up cosmetic with oil-to-powder effect and preparation method thereof

Info

Publication number: CN116059134B
Application number: CN202310061787.1A
Authority: CN
Inventors: 谢旭; 顾佳敏; 姜璐霁; 周艳如
Original assignee: Shanghai Mianhuatang Biotechnology Co ltd
Current assignee: Shanghai Mianhuatang Biotechnology Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2024-09-17
Anticipated expiration: 2043-01-13
Also published as: CN116059134A

Abstract

The application relates to the field of make-up cosmetics, and particularly discloses a make-up cosmetic with an oil-to-powder effect and a preparation method thereof. A make-up cosmetic with oil-to-powder effect comprises oil-to-powder composition and cosmetic adjuvants; the oil-to-powder composition comprises 6-30 parts of composite powder, 12-37.5 parts of composite grease and 1-3 parts of thixotropic agent; the composite powder includes: 1-10 parts of silica and 5-20 parts of vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer; the compound grease comprises 1-3 parts of phenyl trimethyl siloxane, 1-4.5 parts of polydimethylsiloxane, 5-15 parts of cyclopenta dimethyl siloxane and 5-15 parts of isododecane. The make-up cosmetic with the oil-to-powder effect has a solid state without flowing, has a smooth oil feel at the early coating stage, is easy to push away, forms a powder feel at the later coating stage, is dry and non-greasy, and realizes the make-up effect while solving the problem that powder-based products are easy to inhale.

Description

Make-up cosmetic with oil-to-powder effect and preparation method thereof

Technical Field

The application relates to the field of make-up cosmetics, in particular to a make-up cosmetic with an oil-to-powder effect and a preparation method thereof.

Background

The make-up product is a classification of cosmetics, and is smeared on the face to play roles in absorbing excessive facial grease and reducing facial gloss, can comprehensively adjust skin color, enables the make-up to be more durable, smooth and fine, and can prevent makeup from being taken off. Thus, the make-up operation often serves as the last ring of the overall make-up process, making the make-up cosmetic a wide application market.

The powder-based make-up product comprises a powder cake, powder and the like, and can be in a dry powder shape to be adhered to the face when in use, so that the powder-based make-up product has better effects of adsorbing grease and delaying the makeup removal.

At present, powder-based make-up products such as powder cakes and loose powder are limited by the characteristics of lighter materials and easy flying of powder, and the problem of easy dust inhalation exists in the use process of users, so that the experience of the users is reduced.

Disclosure of Invention

In order to improve the defect that a powder-based make-up product is easy to inhale, and endow a user with better use feeling, the application provides a make-up cosmetic with an oil-to-powder effect and a preparation method thereof.

In a first aspect, the present application provides a make-up cosmetic having an oil-to-powder effect, which adopts the following technical scheme:

A make-up cosmetic with oil-to-powder effect comprises oil-to-powder composition and cosmetic adjuvants;

the oil-in-powder composition comprises the following components in parts by weight:

6-30 parts of composite powder, 12-37.5 parts of composite grease and 1-3 parts of thixotropic agent;

the preparation raw materials of the composite powder comprise the following components in parts by weight:

1-10 parts of silica and 5-20 parts of vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer;

The preparation raw materials of the composite grease comprise the following components in parts by weight:

1-3 parts of phenyl trimethicone, 1-4.5 parts of polydimethylsiloxane, 5-15 parts of cyclopentadimethicone and 5-15 parts of isododecane.

By adopting the technical scheme, the prepared oil-to-powder composition is in a non-flowing solid state in appearance by using a thixotropic agent with higher content, and forms an oily feel after being smeared on skin; the oil-to-powder composition has smooth oil feel at the initial coating stage, gradually volatilizes at the later coating stage and forms dry powder feel, and the problem that dust is easy to inhale in the use process is solved by compounding the phenyl trimethicone and the polydimethylsiloxane with low volatility, the isododecane and the cyclopentadimethicone with high volatility, and compounding the compound grease with the phenyl trimethicone and the cyclopentadimethicone and then compounding the compound powder.

The performance of the cosmetics prepared by the application is detected, and the composite grease obtained by compounding phenyl trimethyl siloxane, polydimethylsiloxane, cyclopenta dimethyl siloxane and isododecane is used, so that the slidability, viscosity and oiliness of the cosmetics at the earlier stage of application are respectively 5, 4 and 4, and the touch feeling is smooth; the slidability, viscosity and oiliness at the later period of application are all 1, and the touch feeling is dry and cool and is not greasy.

Alternatively to this, the method may comprise,

The preparation raw materials of the composite grease also comprise the following components in parts by weight:

2-3 parts of mandelic acid and 1-1.5 parts of phytosterol;

the preparation method of the composite grease comprises the following steps: adding phytosterol into mandelic acid solution, performing ultrasonic treatment at 40-80 ℃, adding phenyl trimethicone and polydimethylsiloxane, and homogenizing to obtain composite microspheres; adding cyclopentadimethicone and isododecane into the composite microsphere, and homogenizing to obtain the final product.

By adopting the technical scheme, the performance of the cosmetic prepared by the application is detected, the slidability of the cosmetic added with the phytosterol and the mandelic acid is obviously improved from 6 to 8 when the phytosterol and the mandelic acid are not added, and the viscosity and the oiliness are reduced from 4 to 3, so that the cosmetic is smoother in the early coating stage, the slidability, the viscosity and the oiliness in the later coating stage are still kept at 1-2, the cosmetic is still dry and not greasy in the later coating stage, and the reasons for analysis are probably that:

The plant sterol is emulsified into spherical micro-clusters in mandelic acid solution, hydroxyl groups of the plant sterol and hydroxyl groups or carbonyl groups of the mandelic acid form intermolecular hydrogen bonds and form a network structure, and a nonpolar carbon end of the plant sterol is combined with phenyl trimethicone and polydimethylsiloxane to wrap and form composite microspheres, so that the plant sterol is smoothly applied to skin without coagulation and adhesion phenomenon, the smoothness of cosmetics is improved, and the greasy feeling caused by silicone oil components remained on the surface of the skin is reduced;

On the other hand, phenyl trimethicone and polydimethylsiloxane remain on the skin surface and form a film on the skin surface, and the skin is dried to some extent without moisture between the skin and the film. The high water absorption phytosterol can perform long-term hydration, improve the moisturizing effect and slow down skin dryness; the lipophilic mandelic acid can permeate into sebaceous glands to reduce lipid production, and the prepared cosmetic has the effects of relieving skin dryness and reducing skin oil production by adding the lipophilic mandelic acid and the lipophilic mandelic acid.

Optionally, the preparation raw materials of the composite grease comprise the following components in parts by weight:

2 parts of phenyl trimethicone, 2.5 parts of polydimethylsiloxane, 10 parts of cyclopentadimethicone, 10 parts of isododecane, 2.5 parts of mandelic acid and 1.25 parts of phytosterol.

Optionally, the mandelic acid solution is prepared by mixing mandelic acid and normal saline according to a weight ratio of 1 (22-28).

By adopting the technical scheme, the concentration of the mandelic acid solution is controlled, the slight irritation of the cosmetics caused by introducing the mandelic acid is reduced, and the prepared cosmetics have good mildness.

Optionally, the phytosterol is one or more of beta-sitosterol, campesterol, stigmasterol, brassicasterol, avenantterol, arundo donax sterol and fucosterol.

Optionally, the thixotropic agent is disteardimethylammonium hectorite.

By adopting the technical scheme, the stability of the whole formula is ensured on one hand by adding the distearyl dimethyl ammonium hectorite with relatively high content, the whole paste has thixotropic property on the other hand, the tentacle-like skin feel is brought, and the better use feeling is given to a user.

Optionally, the cosmetic auxiliary materials comprise the following components in parts by weight: 0.5-3 parts of film forming agent, 1-15 parts of solvent, 1-5 parts of emulsifying agent, 0.5-1.5 parts of activating agent, 2.2-4 parts of coloring agent and 0.3-0.6 part of preservative.

By adopting the technical scheme, the cosmetic with the oil-to-powder effect is prepared, the whole cosmetic presents a non-flowing solid state, the cosmetic is very light, thin and smooth in the early coating period, dry and smooth in the later coating period, the defect of easy inhalation of the powder-based make-up product is overcome, and a user has better use feeling.

Optionally, the colorant comprises the following components in parts by weight: 2-3 parts of Ti-18AS, 0-0.5 part of RP-29AS, 0.2-1 part of YP-75AS and 0-0.45 part of BP-50 AS.

In a second aspect, the application provides a preparation method of a make-up cosmetic with oil-to-powder effect, which adopts the following technical scheme:

a preparation method of a make-up cosmetic with oil-to-powder effect comprises the following steps:

S1, adding composite powder and thixotropic agent into composite grease, heating to 82-88 ℃, and stirring and mixing to obtain an oil-to-powder composition; s2, putting the film forming agent, the solvent, the emulsifying agent, the activating agent, the coloring agent and the preservative into an emulsifying pot, heating to 76-80 ℃, stirring and mixing, keeping the temperature to 70-75 ℃, adding the oil-to-powder composition, and stirring and mixing to obtain the oil-to-powder emulsion.

By adopting the technical scheme, the preparation process is simple, other harsh process conditions are not needed except temperature control, and the make-up cosmetic with good stability, smoothness and easy pushing in the earlier application stage and dryness and non-greasiness in the later application stage is prepared simply and efficiently.

In summary, the application has the following beneficial effects:

1. the oil-in-powder composition is in a non-flowing solid state as a whole by using a thixotropic agent with higher content, and has a smooth oil feel at the initial coating stage by compounding phenyl trimethicone, polydimethylsiloxane, cyclopentadimethicone, isododecane and composite powder, and gradually forms a dry powder feel along with volatilization of grease; after the oil-to-powder composition is added into cosmetics, the problem that powder-based make-up cosmetics are easy to inhale is solved, and a better use feeling is given to a user;

2. by adding the phytosterol and the mandelic acid, the phytosterol and the mandelic acid wrap phenyl trimethicone and the polydimethylsiloxane to form composite microspheres, so that the grease remained on the skin surface is smoothly applied to the skin surface without aggregation and adhesion, the smoothness of the cosmetics is improved, and the greasy feeling caused by the silicone oil component remained on the skin surface is reduced;

3. by adding relatively high content of disteardimonium hectorite in the cosmetic ingredients, on the one hand, the stability of the whole formula is ensured, on the other hand, the whole paste is thixotropic, the tentacle-like skin feel is brought, and the better use feeling is given to a user.

Detailed Description

The present application will be described in further detail with reference to examples.

Preparation examples 1-3, comparative preparation examples 1-2

A compound oil is prepared from phenyl trimethyl silicone, dimethyl silicone polymer, cyclopenta dimethyl silicone polymer, and isododecane by conventional mixing;

The amounts of phenyl trimethicone, polydimethylsiloxane, cyclopentadimethicone and isododecane used were as follows: preparation example 1, phenyl trimethicone 1kg, polydimethylsiloxane 1kg, cyclopentadimethicone 5kg, isododecane 5kg.

Preparation example 2, phenyl trimethicone 2kg, polydimethylsiloxane 2.5kg, cyclopentadimethicone 10kg, isododecane 10kg.

Preparation example 3, phenyl trimethicone 3kg, polydimethylsiloxane 4.5kg, cyclopentadimethicone 15kg, isododecane 15kg.

Comparative preparation 1, phenyl trimethicone 0kg, polydimethylsiloxane 0kg, cyclopentadimethicone 17kg, isododecane 7.5kg.

Comparative preparation 2, phenyl trimethicone 10kg, polydimethylsiloxane 14.5kg, cyclopentadimethicone 0kg, isododecane 0kg.

Preparation examples 4 to 6

The preparation method of the composite grease comprises the following steps of:

Adding phytosterol into mandelic acid solution, performing ultrasonic treatment at 60 ℃ (the frequency is 50kHz, the power is 120 w), adding phenyl trimethicone and polydimethylsiloxane, and homogenizing (homogenizing by using a homogenizer, the pressure is 250bar, and the temperature is 70 ℃), thereby obtaining composite microspheres; adding cyclopentadimethicone and isododecane into the composite microsphere, and homogenizing (stirring and mixing at 50deg.C for 20 min).

The mandelic acid solution is prepared by conventionally mixing DL-mandelic acid and physiological saline with the concentration of 0.9wt% according to the weight ratio of 1:20; the phytosterol is beta-sitosterol, which is obtained from Wuhan Hua Xiangke Jietexilate Co., ltd, product number 64997-52-0;

Phenyl trimethicone is available under the brand name Dow Corning, model DC556;

the polydimethylsiloxane is available under the brand name Dow Corning, model DC200;

The brand of cyclopentadimethicone is Dow Corning model DC245.

TABLE 1 Components in preparation examples 2, 4-6 and weights (kg)

It should be noted that the ultrasonic temperature when the phytosterol is added into the mandelic acid solution can be selected within the range of 40-80 ℃, and the ultrasonic temperature does not greatly affect the performance test solution result of the application, and the application is briefly described by taking 60 ℃ as an example.

Comparative preparation example 3

A compound oil and fat is different from preparation example 5 in that no phytosterol is added, and the total amount of the compound oil and fat is unchanged.

Comparative preparation example 4

A composite oil and fat is different from preparation example 5 in that DL-mandelic acid is not added, and the total amount of the composite oil and fat is unchanged.

Comparative preparation example 5

A compound oil and fat is different from preparation example 5 in that L-lactic acid is used in the same amount instead of DL-mandelic acid.

Comparative preparation example 6

A compound oil and fat is different from preparation example 5 in that an equivalent amount of DL-malic acid is used instead of DL-mandelic acid.

Preparation examples 7 to 9

The composite grease is different from the preparation example 5 in that the mandelic acid solution is prepared by conventionally mixing mandelic acid and normal saline according to the following weight ratio:

Preparation 5, DL-mandelic acid was mixed with physiological saline at a concentration of 0.9wt% at a weight ratio of 1:20.

Preparation 7, DL-mandelic acid was mixed with physiological saline at a concentration of 0.9wt% at a weight ratio of 1:22.

Preparation 8, DL-mandelic acid was mixed with physiological saline at a concentration of 0.9wt% at a weight ratio of 1:25.

Preparation 9, DL-mandelic acid was mixed with physiological saline at a concentration of 0.9wt% in a weight ratio of 1:28.

Preparation example 10

A compound oil and fat is different from preparation 5 in that an equivalent amount of soybean extract is used instead of beta-sitosterol;

The soybean extract is beta-sitosterol, campesterol, mixture of stigmasterol and brassicasterol, and is obtained from Sesamum indicum biotechnology limited company.

Examples 1-3, comparative examples 1-2

A make-up cosmetic with oil-to-powder effect comprises an oil-to-powder composition, cosmetic auxiliary materials, and the components and the weight thereof refer to Table 2, and are prepared according to the following steps:

S1, adding composite powder and thixotropic agent into composite grease, heating to 85 ℃, and stirring and mixing for 20min to obtain an oil-to-powder composition;

The composite grease is prepared by a preparation example 1, and the composite powder is prepared by conventionally mixing silica and vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer;

S2, putting the film forming agent, the solvent, the emulsifying agent, the activating agent, the coloring agent and the preservative into an emulsifying pot, heating to 80 ℃, stirring and mixing for 15min, preserving heat to 70 ℃, adding the oil-to-powder composition, and stirring and mixing for 20min to obtain the oil-to-powder emulsion.

TABLE 2 Components of examples 1-3 and comparative examples 1-2 and weights (kg)

It should be noted that, each temperature in the steps S1 and S2 may be within a range, for example,

The heating temperature in step S1 may be selected in the range of 82-88 deg.C,

The heating temperature in step S2 may be selected in the range of 76-80 c,

The temperature in step S2 may be selected in the range of 70-75 c,

The above options do not have a major impact on the performance of the cosmetic product produced, but only one temperature within this range is briefly described in the present application.

Examples 4 to 12, comparative examples 3 to 8

A make-up cosmetic having an oil-to-powder effect is different from example 1 in that the use of the compound grease is shown in table 3.

TABLE 3 usage of the compound fats and oils of examples 1, 4 to 12 and comparative examples 3 to 8

Examples	1	4	5	6	7	8	9	10	11	12
											Preparation example of composite grease	1	2	3	4	5	6	7	8	9	10
Comparative example	3	4	5	6	7	8	\	\	\	\
											Comparative preparation example of Compound grease	1	2	3	4	5	6	\	\	\	\

Examples 13 to 15

A make-up cosmetic having oil-to-powder effect is different from example 11 in that a mixture of equal amounts of Ti-18AS, RP-29AS, YP-75AS, BP-50AS is used instead of Ti-18AS; the weight ratio of Ti-18AS, RP-29AS, YP-75AS and BP-50AS is AS follows:

the weight ratio of example 13, ti-18AS, RP-29AS, YP-75AS, BP-50AS was 2:0:0.2:0.

The weight ratio of example 14, ti-18AS, RP-29AS, YP-75AS, BP-50AS was 2.5:0.25:0.6:0.25.

The weight ratio of example 15, ti-18AS, RP-29AS, YP-75AS, BP-50AS was 3:0.5:1:0.45.

The choice of the coloring agent is not limited to Ti-18AS, RP-29AS, YP-75AS, BP-50AS, and may be adjusted according to the skin color, and the above choice does not affect the performance detection effect, and the present application will be briefly described by taking the above coloring agent AS an example.

Performance detection

1. Sensory properties: five volunteers were randomly selected, and after skin cleansing in the morning, each volunteer was evaluated for the properties "tackiness, slipperiness, oiliness" during application and after 20 seconds, respectively, and rated from 0 (no property present) to 10 (very strong property present), and the mean value (rounded value, rounded) of 5 scores was recorded in table 4, and on the basis of the rating, a difference of 2 was described as remarkable in sensory difference.

2. Stability test: placing the cosmetics prepared in the examples and comparative examples in an electrothermal constant temperature incubator, storing at 50deg.C for 3 months, and recovering room temperature and observing; storing at-18deg.C for 3 months, and recovering room temperature and observing; storing at-18deg.C for 24 hr, storing at 48deg.C for 24 hr, sequentially circulating for three times, and recovering room temperature and observing; after the test, if the phenomena of oil bleeding, water separation, coarse grain, demulsification and the like of the cosmetics are not observed, no physical and chemical changes are generated, namely the recorded result is qualified in stability, otherwise, the recorded result is unqualified in stability.

TABLE 4 Performance test results

As is clear from Table 4, in example 1, the use of the composite oil obtained in preparation example 1 resulted in a make-up cosmetic having a slidability of 5 and a feeling of 4 at the initial stage of application, a smooth touch and easy push-off, and a powdery touch, a slidability, an oiliness, a viscosity of 1 at the later stage of application, and a dry touch and no sticky touch.

In combination with Table 4, examples 1-3 and comparative examples 1-2 are different in the amounts of the respective components used, and each of the properties in examples 1-3 is superior to that in comparative examples 1-2, indicating that the cosmetic has a better feel and gives a better use feeling to the user when the respective components are within the range of examples 1-3.

The difference between examples 4 to 5 and comparative examples 3 to 4 and example 1 is that the amounts of phenyl trimethicone, polydimethylsiloxane, cyclopentadimethicone, and isododecane used in the resulting composite oils were different from each other with reference to Table 4. Examples 1 and 4 to 5 were excellent in slidability, viscosity and oil properties, and had a feeling of touch, in most cases 1; in comparative example 3, the slidability, viscosity and oiliness were all 0, which indicates that the skin is extremely dry in the later period of application, and skin peeling is easily caused; in comparative example 4, the slidability, viscosity and oiliness were all 3-4, indicating that the paint was still oily, not dry and comfortable at the later stage of application and had poor touch. Therefore, the amounts of the components of the compound grease should be in the range of examples 1, 4-5.

With reference to table 4, examples 6-8 are different from example 4 in that phytosterol and mandelic acid are also added in the preparation process of the compound grease, compared with example 4, the slidability in examples 6-8 is obviously improved from 6 to 8, the earlier stage of application of the cosmetics is smoother, the slidability, viscosity and oiliness after 20s of application are still kept at 1-2, the later stage of application of the cosmetics is dry and comfortable, the touch feeling is better, and the better use feeling is given to a user;

The reason for this analysis may be: the plant sterol and the mandelic acid form a network structure, and the nonpolar carbon end of the plant sterol is combined with phenyl trimethicone and polydimethylsiloxane to form composite microspheres, so that the cosmetic is smoothly applied to the skin without being difficult to push away or causing greasy touch due to aggregation and adhesion, and the smoothness of the cosmetic is improved. At the same time, plant sterols and mandelic acid also provide the effect of the cosmetic in relieving skin dryness and reducing skin oil production.

Among them, the cosmetic of example 7 was excellent in each property, and in the preferred example, the slidability was 9, the tackiness was 3, the oiliness was 3, and the slidability after 20 seconds of application was 2, the tackiness was 1, and the oiliness was 2.

In combination with table 4, the difference between comparative example 5 and example 7 is that no phytosterol was added during the preparation of the compound grease, the difference between comparative example 6 and example 7 is that no mandelic acid was added during the preparation of the compound grease, the sensory properties of the cosmetics of comparative examples 5 and 6 were substantially the same as those of example 4 in which no phytosterol and mandelic acid were simultaneously added, and the smoothness was significantly lower than that of example 7. It is shown that the addition of only phytosterol or mandelic acid does not improve the sensory properties of the cosmetic at all, whereas the addition of both in example 7 significantly improves the smoothness of the cosmetic and is dry and not greasy after the formation of the powder.

Comparative examples 7 and 8 are different from example 7 in that malic acid and lactic acid were used instead of mandelic acid, respectively, and the cosmetic in comparative examples 7 and 8 was substantially less smooth than that in example 7 in the sensory properties during application and after 20 seconds as compared with comparative example 6 in which mandelic acid was not added. The application shows that the malic acid, the lactic acid and other fruit acids can not be applied to the scheme of the application to replace the mandelic acid to improve the smoothness of the cosmetics, and only the compound of the mandelic acid and the phytosterol is added at the same time to improve the smoothness of the cosmetics.

The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.

Claims

1. A make-up cosmetic with oil-to-powder effect is characterized by comprising an oil-to-powder composition and cosmetic auxiliary materials;

Phenyl trimethicone 1-3 parts, polydimethylsiloxane 1-4.5 parts, cyclopenta-dimethicone 5-15 parts and isododecane 5-15 parts; 2-3 parts of mandelic acid and 1-1.5 parts of phytosterol;

The preparation method of the composite grease comprises the following steps: adding phytosterol into mandelic acid solution, performing ultrasonic treatment at 40-80 ℃, adding phenyl trimethicone and polydimethylsiloxane, and homogenizing to obtain composite microspheres; adding cyclopentadimethicone and isododecane into the composite microsphere, and homogenizing to obtain the final product;

the mandelic acid solution is prepared by mixing mandelic acid and normal saline according to the weight ratio of (22-28);

The plant sterol is one or more of beta-sitosterol, campesterol, stigmasterol, brassicasterol, oat sterol, arundosterol and fucosterol;

the thixotropic agent is distearyl dimethylammonium hectorite;

The cosmetic auxiliary material comprises the following components in parts by weight: 0.5-3 parts of film forming agent, 1-15 parts of solvent, 1-5 parts of emulsifying agent, 0.5-1.5 parts of activating agent, 2.2-4 parts of coloring agent and 0.3-0.6 part of preservative.

2. A make-up cosmetic product having an oil-to-powder effect as claimed in claim 1, wherein: the preparation raw materials of the composite grease comprise the following components in parts by weight:

3. The make-up cosmetic with oil-to-powder effect according to claim 1, wherein the colorant comprises the following components in parts by weight: 2-3 parts of Ti-18AS, 0-0.5 part of RP-29AS, 0.2-1 part of YP-75AS and 0-0.45 part of BP-50 AS.

4. A method for preparing a make-up cosmetic having an oil-to-powder effect as claimed in any one of claims 1 to 3, comprising the steps of:

s1, adding composite powder and thixotropic agent into composite grease, heating to 82-88 ℃, and stirring and mixing to obtain an oil-to-powder composition;

s2, putting the film forming agent, the solvent, the emulsifying agent, the activating agent, the coloring agent and the preservative into an emulsifying pot, heating to 76-80 ℃, stirring and mixing, keeping the temperature to 70-75 ℃, adding the oil-to-powder composition, and stirring and mixing to obtain the oil-to-powder emulsion.