CN112156035B

CN112156035B - Sun-proof stick and preparation method thereof

Info

Publication number: CN112156035B
Application number: CN202011123947.3A
Authority: CN
Inventors: 李毛毛
Original assignee: Shanghai Zhongyi Daily Chemical Co ltd
Current assignee: Shanghai Zhongyi Daily Chemical Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-10-21
Anticipated expiration: 2040-10-20
Also published as: CN112156035A

Abstract

The invention relates to the technical field of sun protection, in particular to a sun protection stick and a preparation method thereof, wherein the sun protection stick comprises 15-30 parts of sun protection agent, 20-60 parts of liquid grease, 15-25 parts of thickening agent, 0-15 parts of filling agent, 0-1 part of antioxidant, 0-2 parts of preservative and 0-2 parts of skin care agent in parts by weight. The sunscreen stick provided by the invention is a pure oil type, does not contain water, does not contain an emulsifier, has a matte makeup effect, does not cause the oil gloss of the coated part, solves the problem that the commercial sunscreen stick is completely coated with 'full-gloss', is light and thin in use, breathable and good in smooth feeling, can be applied to color makeup and foundation makeup in a spot coating mode, and has lower damage capability to the color makeup compared with the commercial products.

Description

Sun-proof stick and preparation method thereof

Technical Field

The invention relates to the technical field of sun protection, in particular to a sun protection rod and a preparation method thereof.

Background

Proper sunlight is beneficial to the body, but the sun can be damaged by ultraviolet rays in the sunlight for long-time outdoor activities, and if the sun is not protected in time, the skin is easily damaged by the ultraviolet rays. The sunscreen product is used as a common cosmetic, and can block or absorb ultraviolet rays to achieve the purpose of preventing skin from being sunburned and sunburned.

The sunscreen should be applied half an hour before going out, and due to dilution of sweat and other reasons, the sunscreen effect is weakened, so the sunscreen effect can be effectively achieved only by applying the sunscreen once every 2-3 hours. The current sunscreen products comprise various products, such as sunscreen cream, sunscreen emulsion, sunscreen spray, sunscreen stick, foundation with sunscreen function, pressed powder and the like. The sunscreen lotion and the sunscreen spray are the most common, and the sunscreen lotion serving as a traditional sunscreen preparation is widely loved by good moisture retention, air permeability and portability, but cannot meet the condition that makeup persons can make up on makeup surfaces, so that the requirements of a plurality of persons who are used to drawing color makeup in weekdays and have the requirement of making up cannot be met. Compared with sunscreen emulsion, sunscreen spray is easier to be applied, but due to the packaging form of aerosol cans, the sunscreen spray does not meet the carrying regulations when people go on a subway, a train, an airplane and the like, so that the sunscreen spray is inconvenient to use in most cases when people go on a trip and travel. The foundation and the pressed powder with the sun-screening function have the characteristics of portability and makeup supplementation, but have the makeup effect, so the foundation and the pressed powder are slightly inconvenient to use for people who do not make up or most men and children. The sunscreen stick is a simple sunscreen product, does not have a makeup function, can be used without makeup with makeup, has a makeup supplementing function which is not possessed by sunscreen lotion, has a portable function which is not possessed by sunscreen spray, but has the problems of greasiness and no refreshing, contains water or an emulsifier, has destructive capability on base makeup and makeup, and has a poor makeup supplementing effect.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a sunscreen stick in a first aspect, which comprises 15-30 parts of sunscreen agent, 20-60 parts of liquid grease, 15-25 parts of thickening agent, 0-15 parts of filling agent, 0-1 part of antioxidant, 0-2 parts of preservative and 0-2 parts of skin care agent by weight; the liquid grease is selected from one or more of hydrocarbons, silicone oil and esters, and the kinematic viscosity of at least one liquid grease is 5-50 cSt.

As a preferable technical solution of the present invention, the liquid grease includes silicone oil.

As a preferable technical scheme of the invention, the silicone oil is Dimethicone6cst and/or XIAAMETER PMX-200/100CS.

As a preferable technical solution of the present invention, the liquid oil and fat further includes esters, the esters include an ester a having 10 to 20 carbon atoms in a fatty chain and an ester B having 40 to 80 carbon atoms in a fatty chain, and the weight ratio of the esters is 1: (4.5-5.5).

As a preferable technical scheme of the invention, the ester A is selected from one or more of butyl octanol salicylate, isononyl isononanoate and dioctyl carbonate.

As a preferred technical solution of the present invention, the ester B is selected from one or more of tridecyl alcohol trimellitate, pentaerythritol tetraisostearate, and coco-caprylate/caprate.

As a preferred technical solution of the present invention, the ester a is butyl octanol salicylate and dioctyl carbonate, and the weight ratio of the ester a to the dioctyl carbonate is 1: (55-65).

As a preferable technical scheme of the invention, the filler at least comprises a microspherical body with the grain diameter of 3-20 mu m.

As a preferable technical scheme of the invention, the microspherical is selected from one or more of vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane cross-linked polymer, nylon-12, methyl methacrylate cross-linked polymer, polymethyl methacrylate and silica.

The invention provides a preparation method of the sunscreen stick, which comprises the following steps:

(1) Mixing sun-screening agent, liquid oil and thickener, heating to melt, and stirring;

(2) Adding a filler and stirring;

(3) Adding antioxidant, antiseptic, and skin caring agent, heating to melt, and stirring;

(4) Cooling and forming to obtain the product.

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

the sunscreen stick provided by the invention is a pure oil type, contains no water, contains no emulsifier, has matte makeup effect, can not cause the oil gloss of the coated part, solves the problem that the commercial sunscreen stick is completely coated with 'oil gloss full face', is light and thin in use feeling, breathable and good in smooth feeling, can be applied to color makeup and base makeup in a spot coating mode, and has lower damage capability to the color makeup compared with the commercial product.

Drawings

FIG. 1 is a graph of the matte effect of a sunscreen stick provided in example 3 of the present invention and a commercial sunscreen stick;

FIG. 2 is a diagram showing the makeup-supplementing effect of the sunscreen stick and the commercially available sunscreen lotion provided in example 3 of the present invention.

Detailed Description

The present invention will be described below by way of specific embodiments, but is not limited to the specific examples given below.

The invention provides a sunscreen stick which comprises, by weight, 15-30 parts of a sunscreen agent, 20-60 parts of liquid grease, 15-25 parts of a thickening agent, 0-15 parts of a filler, 0-1 part of an antioxidant, 0-2 parts of a preservative and 0-2 parts of a skin care agent.

In one embodiment, the sunscreen further comprises an adjunct ingredient.

In one embodiment, the sunscreen stick comprises 23 parts of sunscreen agent, 51.4 parts of liquid grease, 15 parts of thickening agent, 10 parts of filling agent, 0.3 part of antioxidant, 0.7 part of preservative and 0.3 part of auxiliary ingredients by weight.

Sunscreen agent

In the first chapter of the general nomenclature and definitions in section 2 of the technical Specification for cosmetic safety (2015 edition), it is explicitly stated that sunscreens are substances added to cosmetics by means of the absorption, reflection or scattering action of light to protect the skin from the damage caused by specific UV rays or to protect the product itself.

Sunscreens are a class of substances that protect against ultraviolet radiation, and there are many classes of sunscreens, which can be broadly divided into two classes: physical uv-screening agents and chemical uv-absorbers. Therefore, in recent years, sunscreen cosmetics have been rapidly increasing worldwide, and sunscreen cosmetics are now in a favorable period of development.

The sunscreen agent of the present invention is not particularly limited and may be conventionally selected by those skilled in the art.

In one embodiment, the sunscreen is selected from one or more of ethylhexyl methyl cinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, homosalate, ethylhexyl salicylate, hexyl diethylaminobenzoyl benzoate, octocrylene, and ethylhexyl triazone.

Preferably, the sunscreen agent is ethylhexyl methyl cinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, homosalate, ethylhexyl salicylate and diethyl aminooxybenzoyl hexyl benzoate, and the weight ratio is (1-5): 1: (2-6): (1-4): (0.5 to 3.2); more preferably, the weight ratio of ethylhexyl methyl cinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, homosalate, ethylhexyl salicylate, and diethylamino hydroxybenzoyl hexyl benzoate is 3:1:4:2.5:1.

liquid oil and fat

In one embodiment, the liquid oil is selected from one or more of hydrocarbons, silicone oils, and esters.

Preferably, the kinematic viscosity of the at least one liquid fat is from 5 to 50cSt; more preferably, the kinematic viscosity of the at least one liquid fat is from 5 to 10cSt.

Kinematic viscosity is the ratio of the dynamic viscosity of the fluid to the density ρ of the fluid at the same temperature. Has a unit of (m) ² ) And s. Indicated by the lower case letter v. Note: the units used once are St(s) and (m) ² ) The advancing rate relationship/s is: 1 (m) ² )/s＝10 ⁴ St＝10 ⁶ cSt. (wherein "cSt" is read as "centistokes") treats a flowing liquid as a plurality of liquid layers moving parallel to each other, with the layers differing in velocity, forming a velocity gradient (dv/dx), which is a fundamental characteristic of flow.

The kinematic viscosity test temperature according to the invention is 25 ℃.

In one embodiment, the liquid grease comprises silicone oil.

Preferably, the silicone oil is Dimethicone6cst and/or XIAAMETER PMX-200/100CS; more preferably, the silicone oil is Dimethicone6cst and xiamater PMX-200/100CS.

Preferably, the weight ratio of the Dimethicone6cst to the xiamaterer PMX-200/100CS is (12-18): 1; more preferably, the weight ratio of Dimethicone6cst to xiamaterer PMX-200/100CS is 15:1.

in one embodiment, the liquid oil and fat further comprises esters, wherein the esters comprise an ester A with 10 to 20 carbon atoms in a fatty chain and an ester B with 40 to 80 carbon atoms in the fatty chain, and the weight ratio of the esters A to the esters B is 1: (4.5-5.5).

Preferably, the weight ratio of the esters A and B is 1:5.

in one embodiment, the ester a is selected from one or more of butyl octanol salicylate, isononyl isononanoate, dioctyl carbonate.

Preferably, the ester A is butyl octanol salicylate and dioctyl carbonate, and the weight ratio of the ester A to the dioctyl carbonate is 1: (55-65); more preferably, the weight ratio of butyl octanol salicylate to dioctyl carbonate is 1:60.

in one embodiment, the esters B are selected from one or more of tridecyl trimellitate, pentaerythritol tetraisostearate, coco-caprylate/caprate.

Preferably, the ester B is coco-caprylate/caprate.

The applicant unexpectedly found that when the liquid grease comprises silicone oil, the silicone oil is Dimethicone6cst and XIAMETER PMX-200/100CS, and the weight ratio is (12-18): 1, the lubricating feeling of the sunscreen stick in the using process can be obviously improved, and the using effect of the sunscreen stick in the coating supplementing process is improved, however, the application unexpectedly discovers that the addition of Dimethicone6cst and XIAMETER PMX-200/100CS improves the lubricating property, and simultaneously brings the feeling of insufficient moistening to a user, so that the sensory pleasure degree of the user is reduced, in addition, the application unexpectedly discovers that when the liquid grease also comprises esters, the esters comprise an ester A with a fatty chain carbon number of 10-20 and an ester B with a fatty chain carbon number of 40-80, and the weight ratio of the esters is 1: (4.5-5.5), especially the esters A are butyl octanol salicylate and dioctyl carbonate, and the weight ratio is 1: (55-65), the ester B is coconut oil alcohol-caprylate/caprate, and when the kinematic viscosity of at least one liquid oil is 5-50 cSt, the lubricating effect of the sunscreen stick product is maintained, the greasiness of the sunscreen stick is reduced, and better refreshing property is given, the applicant considers that the possible reason is that the appropriate fatty carbon chain and benzene ring in butyl octanol salicylate and dioctyl carbonate promote the molecular motion of Dimethicone6cSt and XIAMETER PMX-200/100CS, so that partial molecular chain of the liquid oil can enter the epidermal layer with base makeup and color makeup, and has good biocompatibility with the liquid oil, and the adsorption of the liquid oil on the epidermal layer with the base makeup and the color makeup is continuously maintained under the action of the coconut oil alcohol-caprylate/caprate, and the durability of the sunscreen stick is improved.

Thickening agent

The thickener of the present invention is not particularly limited and may be conventionally selected by those skilled in the art.

Such thickeners include, but are not limited to, polyethylene, microcrystalline wax, ceresin, candelilla wax, paraffin wax, synthetic wax, carnauba wax, hydrogenated polyisobutene, and the like.

In one embodiment, the thickening agent is polyethylene and microcrystalline wax.

Preferably, the weight ratio of the polyethylene to the microcrystalline wax is (5-10): 1; more preferably, the weight ratio of polyethylene to microcrystalline wax is 8.7:1.

in one embodiment, the thickening agent is polyethylene, microcrystalline wax, and hydrogenated polyisobutene.

Preferably, the weight ratio of the polyethylene, the microcrystalline wax and the hydrogenated polyisobutene is 10:1: (5-8); more preferably, the weight ratio of the polyethylene, microcrystalline wax and hydrogenated polyisobutene is 10:1:7.

filler

In one embodiment, the filler comprises at least one microspheroidal particle having a particle size of 3 to 20 μm.

Preferably, the filler comprises at least one microspheroidal particle with a particle size of 6-9 μm.

Preferably, the microspheres are selected from one or more of vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer, nylon-12, methyl methacrylate crosspolymer, polymethyl methacrylate and silica; more preferably, the microspheroids are methyl methacrylate crosspolymers.

The methyl methacrylate cross-linked polymer further improves the refreshing effect of the sunscreen stick and simultaneously improves the matte effect of the sunscreen stick.

Antioxidant agent

The antioxidant of the present invention is not particularly limited and may be conventionally selected by those skilled in the art.

The antioxidants include, but are not limited to, pentaerythritol tetrakis (bis-tert-butyl hydroxyhydrocinnamate), tocopherol acetate, and the like.

In one embodiment, the antioxidant is tocopheryl acetate.

Preservative

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

In one embodiment, the preservative is phenoxyethanol.

Skin care agent

The skin care agent of the present invention is not particularly limited and may be conventionally selected by those skilled in the art.

The skin care agents of the present invention include, but are not limited to, skin conditioners, moisturizers, whitening ingredients, humectants, and the like.

Auxiliary ingredients

The auxiliary components of the present invention are not particularly limited and may be conventionally selected by those skilled in the art.

The auxiliary ingredients of the present invention include, but are not limited to, perfumes, active ingredients, and the like.

(2) Adding a filling agent and stirring;

(3) Adding antioxidant, antiseptic and skin caring agent, heating for melting, and stirring;

(4) Cooling and forming to obtain the product.

In one embodiment, the method of making the sunscreen stick comprises the steps of:

(1) Mixing a sun-screening agent, liquid grease, a thickening agent, an antioxidant and a preservative, heating to 95-120 ℃, and stirring;

(2) Adding the filler and the auxiliary components, keeping the temperature at 80-100 ℃, and stirring;

(3) Molding at 80-90 deg.c to obtain the product.

In a preferred embodiment, the preparation method of the sunscreen stick comprises the following steps:

(1) Mixing sun-screening agent, liquid oil, thickener, antioxidant and antiseptic, heating to 105 deg.C, and stirring;

(2) Adding filler and auxiliary components, keeping the temperature at 88 deg.C, and stirring;

(3) Molding at 88 deg.C.

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 restrictive. The starting materials used in the examples which follow are all commercially available unless otherwise stated.

Example 1

Embodiment 1 of the present invention provides a sunscreen stick, which is composed of, by weight, 15 parts of a sunscreen agent, 53.8 parts of a liquid oil, 15 parts of a thickener, 15 parts of a filler, 0.5 part of an antioxidant, 0.7 part of a preservative, and 0.3 part of an auxiliary component.

The sun-screening agent is ethylhexyl methyl cinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, homosalate, ethylhexyl salicylate and diethylamino hydroxybenzoyl hexyl benzoate, and the weight ratio of the sun-screening agent to the diethyl benzoate is 1:1:2:1:0.5; the liquid grease is silicone oil and esters, the silicone oil is purchased from DOW, the model is Dimethicone6cst, the esters are composed of esters A and esters B, and the weight ratio of the esters A to the esters B is 1:4.5, the ester A is butyl octanol salicylate and dioctyl carbonate, and the weight ratio of the ester A to the dioctyl carbonate is 1:55, the ester B is coco-caprylate/caprate. The kinematic viscosity of the liquid grease, namely Dimethicone6cSt, dicaprylyl carbonate and coco-caprylate/caprate, is divided into 6cSt, 8cSt and 5.8cSt.

The thickening agent is polyethylene and microcrystalline wax, and the weight ratio of the thickening agent to the microcrystalline wax is 5:1, the polyethylene was purchased from New Phase under model Performalene PL and the microcrystalline wax was purchased from sonneborn under model MultiWAX W-445.

The filler is methyl methacrylate cross-linked polymer which is purchased from SUNJIN CHEMICAL and is PMMA-S, and the particle size is 6.0 to 9.0 mu m.

The antioxidant is tocopherol acetate; the preservative is phenoxyethanol; the auxiliary component is essence, and the essence is synthetic essence which is purchased from Delaware and has the model of 333757 FEROE.

The preparation method of the sunscreen stick specifically comprises the following steps:

(3) Molding at 88 deg.C.

Example 2

Embodiment 2 of the present invention provides a sunscreen stick, which is composed of, by weight, 30 parts of a sunscreen agent, 35 parts of a liquid oil, 25 parts of a thickener, 7.2 parts of a filler, 0.5 part of an antioxidant, 2 parts of a preservative, and 0.3 part of an auxiliary component.

The sunscreen agent is ethylhexyl methyl cinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, homosalate, ethylhexyl salicylate and diethylamino hydroxybenzoyl hexyl benzoate, and the weight ratio is 5:1:6:1:3.2; the liquid grease is silicone oil and ester, the silicone oil is Dimethicone6cst and XIAAMETER PMX-200/100CS, and the weight ratio is 15:1, the Dimethicone6cst and xiameterer PMX-200/100CS are respectively purchased from DOW and DOW corning, the esters are composed of an ester a and an ester B, and the weight ratio of the esters is 1:5.5, the esters A are butyl octanol salicylate and dioctyl carbonate, and the weight ratio of the esters A to the dioctyl carbonate is 1:65; the ester B is coconut oil alcohol-caprylate/caprate. The kinematic viscosity of the liquid grease, namely Dimethicone6cSt, dicaprylyl carbonate and cocool-caprylate/caprate, is divided into 6cSt, 8cSt and 5.8cSt.

The thickening agent is polyethylene, microcrystalline wax and hydrogenated polyisobutene, and the weight ratio of the thickening agent to the microcrystalline wax is 10:1:7, the polyethylene is available from New Phase under the model Performalene PL, the microcrystalline wax is available from sonneborn under the model MultIWAX W-445, and the hydrogenated polyisobutene is available from Shanghai Baihabo chemical Co., ltd under the model PANALANE H-300E.

The antioxidant is tocopherol acetate; the preservative is phenoxyethanol; the auxiliary component is essence, and the essence is synthetic essence which is purchased from Dezhixin and has the model of 333757 FEROEE.

(3) Molding at 88 deg.C.

Example 3

Embodiment 3 of the present invention provides a sunscreen stick, which is composed of, by weight, 23 parts of a sunscreen agent, 51.4 parts of a liquid oil, 15 parts of a thickener, 10 parts of a filler, 0.3 part of an antioxidant, 0.7 part of a preservative, and 0.3 part of an auxiliary component.

The sunscreen agent is ethylhexyl methyl cinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, homosalate, ethylhexyl salicylate and diethylamino hydroxybenzoyl hexyl benzoate, and the weight ratio is 3:1:4:2.5:1; the liquid grease is silicone oil and ester, the silicone oil is Dimethicone6cst and XIAAMETER PMX-200/100CS, and the weight ratio is 15:1, the Dimethicone6cst and xiameterer PMX-200/100CS are respectively purchased from DOW and DOW corning, the esters are composed of an ester a and an ester B, and the weight ratio of the esters is 1:5, the esters A are butyl octanol salicylate and dioctyl carbonate, and the weight ratio of the esters A to the dioctyl carbonate is 1:60, said ester B is coco-caprylate/caprate. The kinematic viscosity of the liquid grease, namely Dimethicone6cSt, dicaprylyl carbonate and coco-caprylate/caprate, is divided into 6cSt, 8cSt and 5.8cSt.

The thickening agent is polyethylene and microcrystalline wax, and the weight ratio of the thickening agent to the microcrystalline wax is 8.7:1, the polyethylene was purchased from New Phase under model Performalene PL and the microcrystalline wax was purchased from sonneborn under model MultiWAX W-445.

(3) Molding at 88 deg.C.

The SPF index of the sunscreen bar obtained in this example was 50,PA + + +.

Example 4

Embodiment 4 of the present invention provides a sunscreen stick, which is similar to embodiment 1 in the specific implementation manner, except that the weight part of the ester in the liquid silicone oil is 0.

The preparation method of the sunscreen stick is the same as that of example 3.

Example 5

Example 5 of the present invention provides a sunscreen stick, which is the same as example 1 in the specific implementation manner, except that the esters a are isononyl isononanoate and dioctyl carbonate, and the weight ratio of the esters a is 1:60.

the preparation method of the sunscreen stick is the same as that of example 3.

Example 6

Example 6 of the present invention provides a sunscreen stick, which is similar to example 1 in specific embodiment, except that the ester B is pentaerythritol tetraisostearate.

The preparation method of the sunscreen stick is the same as that of example 3.

Example 7

Example 7 of the present invention provides a sunscreen stick that is the same as example 1 except that the filler is silica having a particle size of 1250 mesh, available from Hongkong, nemous mineral products, inc.

The preparation method of the sunscreen stick is the same as that of example 3.

Example 8

Example 8 of the present invention provides a sunscreen stick, which is similar to example 1, except that the filler is silica having a particle size of 325 mesh, which is available from ABC nanotechnology corporation, korea.

The preparation method of the sunscreen stick is the same as that of example 3.

Example 9

Example 9 of the present invention provides a sunscreen stick, which is the same as example 1 except that the filler is 0 part by weight.

The preparation method of the sunscreen stick is the same as that of example 3.

Performance evaluation

And (3) testing the use effect: 30 healthy people were randomly selected to participate in the test. All subjects used the sunscreen sticks obtained in examples 1-9 for 4h, supplemented every 2h for a total of 3 times, and recorded the results as follows:

1) Analysis statistics of subject condition:

subject age interval: 22-45 years old;

sex of the subjects: 22 women, accounting for 73.3 percent; 8 men, accounting for about 26.7 percent;

skin condition of the subject: 7 oil skins accounting for about 23.3%, 13 mixed skins accounting for about 43.3%, 5 neutral skins accounting for 16.7%, and 5 dry skins accounting for about 16.7%;

whether the subject used a sunscreen product: the product can be used for years: 7, accounting for about 23.3%; use in summer: 17, accounting for about 56.7%; use when summer is outdoor: 4, accounting for about 13.3%; no sun protection was used: 2, accounting for about 6.7%;

the number of people on the day with color cosmetic trials: 14 people, accounting for about 46.7 percent.

2) Evaluation criteria: and (4) grading smoothness, refreshing feeling, matte feeling, persistence, use effect after color makeup and use will, wherein the full score is 5, and finally, averaging.

Smoothness: 0 min-completely unsmooth, 5 min-very smooth

Refreshing feeling: 0 point-completely not fresh, 5 points-very fresh

Matte feeling: 0 minute-the matte effect is completely insufficient, 5 minutes-the matte effect is sufficient

The persistence degree is as follows: 0 point-completely non-durable, 5 points-very durable

The use effect after color makeup is as follows: 0 minute-completely destroying the makeup, 5 minutes-very satisfactory, completely not destroying the makeup

The use will: score 0-completely unwilling to try, score 5-very willing to try

The evaluation results of smoothness, refreshing feeling, matte feeling, durability, after-makeup use effect and use intention of the sunscreen sticks obtained in examples 1 to 3 are shown in Table 1.

TABLE 1

The evaluation results of the refreshing feeling, matte feeling and durability after 4 hours using the sunscreen sticks obtained in examples 4 to 9 are shown in Table 2.

TABLE 2

The number of people enjoyed after using the sunscreen stick obtained in example 3 was recorded, and the results are shown in Table 3.

TABLE 3

The results in tables 1-3 show that the sun-proof stick provided by the invention has high average values of indexes such as smooth feeling, refreshing feeling, matte feeling, persistence and the like, skin feeling, makeup feeling, convenience for coating, portability and the like are favored by a certain number of people, and the total use will score is high.

In fig. 1, the left and right images are respectively a comparison of matte effect after coating a commercial sunscreen stick and a sunscreen stick provided in example 3 of the present invention on gloss detection paper with gloss and 5 times, wherein the commercial sunscreen stick is JM solvation and whiteness flowers skin test.

From fig. 1, it can be seen that the sunscreen stick obtained in example 3 of the present invention has a good matte effect.

In fig. 2, the upper diagram is a diagram showing the effect of applying the same thickness of a blush on an arm by the same method, the left area of the lower diagram is a diagram showing the effect of applying a sunscreen cream on the surface of the blush, and the right area of the lower diagram is a diagram showing the effect of applying a sunscreen stick obtained in embodiment 3 of the present invention on the surface of the blush, wherein the sunscreen cream is anesas perfert uv supercreeyanatoster.

As can be seen from figure 2, the sunscreen stick provided by the invention has a good makeup supplementing effect, has small influence on makeup, and is convenient for makeup supplementation.

The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as can be conceived and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims

1. A sun-proof stick is characterized by comprising, by weight, 15 to 30 parts of a sun-proof agent, 20 to 60 parts of liquid grease, 15 to 25 parts of a thickening agent, 7.2 to 15 parts of a filling agent, 0~1 parts of an antioxidant, 0~2 parts of a preservative and 0~2 parts of a skin care agent; the liquid grease is silicone oil and esters;

the silicone oil is Dimethicone6cst and XIAAMETER PMX-200/100CS, and the weight ratio is (12 to 18): 1;

the esters comprise an ester A with 10 to 20 carbon atoms of a fatty chain and an ester B with 40 to 80 carbon atoms of the fatty chain, and the weight ratio of the esters is 1: (4.5 to 5.5);

the ester A is butyl octanol salicylate and dioctyl carbonate, and the weight ratio of the ester A to the dioctyl carbonate is 1: (55 to 65);

the ester B is coconut oil alcohol-caprylate/caprate;

the filler at least comprises a micro sphere with the particle size of 3-20 mu m;

the micro-spheres are selected from one or more of vinyl polydimethylsiloxane/polymethylsiloxane silsesquioxane crosspolymer, nylon-12, methyl methacrylate crosspolymer, polymethyl methacrylate and silica.

2. A process for the preparation of a sunscreen stick according to claim 1, characterized in that it comprises the following steps:

(2) Adding a filler and stirring;

(4) Cooling and forming to obtain the product.