Anti-ultraviolet external preparation composition and sunscreen cosmetic containing same

Abstract

Provided are: an external preparation composition which does not need to be re-applied during the day while ensuring ultraviolet protection, is easy to remove after use, and has an excellent feeling of use; and a sunscreen cosmetic containing the composition. According to the present invention, it is possible to obtain an external preparation composition for the purpose of preventing ultraviolet rays, which contains (A) a polyurethane as a main component, and which contains (B) a water-dispersible polymer, (C) an ultraviolet-screening agent, (D) a particulate coating material, and (E) a water-soluble solvent, and a sunscreen cosmetic containing the composition.

Description

Technical Field

[0001] The present invention relates to an external preparation composition for preventing ultraviolet rays, which has polyurethane as a main component, and a sunscreen cosmetic containing the composition. Background Art

[0002] It is well known that ultraviolet rays (hereinafter referred to as UV) have adverse effects on the skin.

[0003] It is known that UV-A can penetrate deep into the skin, causing collagen and other proteins to be denatured by UV, causing wrinkles and age spots that lead to aging. UV-B light can cause skin inflammation, and UV-C light is considered to be a factor in causing skin cancer.

[0004] Therefore, there are many products on the market that contain ultraviolet absorbing or ultraviolet shielding compositions as ultraviolet protection external preparation compositions.

[0005] For example, Patent Document 1 discloses an ultraviolet protection enhancing agent containing a quaternary ammonium group-containing cationic hyaluronic acid and / or a salt thereof as an active ingredient.

[0006] In addition, as ultraviolet absorbers, W / O or O / W emulsion-type ultraviolet protection external preparation compositions containing UV absorbers such as ethylhexyl methoxycinnamate, diethylaminohydroxyhexyl benzoate, and bisethylhexyloxybenzoyl triazine, and UV shielding agents such as titanium dioxide and zinc oxide are known.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2023-122526 Summary of the invention

[0010] Problems to be solved by the invention

[0011] However, the above-mentioned conventional UV protection external preparation compositions have various problems although they can ensure UV protection.

[0012] First, many conventional UV protection external preparation compositions are skin external preparations made of water-in-oil (W / O) emulsions or oil-in-water (O / W) emulsions containing oils, but they lack long-term durability during the day and are easily ineffective due to friction, so they need to be reapplied during the day. In addition, since the retention of UV protection ability is poor, it also needs to be reapplied during the day.

[0013] In addition, the UV protection formula of traditional topical preparation compositions is mainly composed of ingredients that are easily soluble in the oil phase. In order to improve tolerance to sweat, etc., an oil-in-water (W / O) formula is usually adopted. Therefore, an oil-soluble makeup remover product is required, which increases the inconvenience of removing the product from the skin after use.

[0014] Although the above-mentioned external preparation compositions have a good ultraviolet protection effect, they may contain ingredients that are irritating to the skin or may cause allergies.

[0015] In summary, the following problems exist in UV protection topical preparation compositions: (1) O / W preparations have a low tolerance to friction and must be reapplied during the day; (2) Although W / O preparations have a high tolerance to water, they have a low tolerance to friction and are difficult to remove because they are mainly composed of an oil phase. They are also sticky and have a poor feel when used; (3) Both of the above preparations often contain ingredients such as UV protection agents whose safety is questionable.

[0016] Therefore, the present invention aims to solve the above-mentioned problems, and its purpose is to provide an external preparation composition that can ensure ultraviolet protection, does not need to be reapplied during the day, is easy to remove after use, and has an excellent feeling of use, and a sunscreen cosmetic containing the composition.

[0017] Solutions for solving problems

[0018] (1) An external preparation composition for UV protection, characterized in that it includes (A) polyurethane as a main component and contains the following components: (B) a water-dispersible polymer, (C) an ultraviolet shielding agent, (D) a particle coating material, and (E) a water-miscible solvent.

[0019] (2) In the external preparation composition described in (1) above, the content of the component (A) is 2.5 to 25 wt.%.

[0020] (3) In the external preparation composition described in (1) above, the content of the component (D) is 5 to 13 wt.%.

[0021] (4) In the external preparation composition described in (1) above, the content of the component (C) is 0.5 to 15 wt.%.

[0022] (5) In the external preparation composition described in (1) above, when the component (B) is a 30% concentration solution, the blending ratio of the component (B) is 0.5 to 9 wt.%.

[0023] (6) In the external preparation composition described in (1) above, the content of the component (E) is 13 to 40 wt.%.

[0024] (7) A sunscreen cosmetic comprising the external preparation composition described in (1) above.

[0025] (8) In the sunscreen cosmetic described in (7) above, the content of the oily agent is 5.0 wt.% or less.

[0026] Effects of the Invention

[0027] According to the present invention, it is possible to provide an external preparation composition which ensures ultraviolet protection, does not require reapplication during the day, is easy to remove after use, and has an excellent feeling of use, and a sunscreen cosmetic containing the composition. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present invention will be described in detail.

[0029] <Composition of external preparation>

[0030] The external preparation composition for ultraviolet protection according to an embodiment of the present invention is characterized by including polyurethane as a main component, and containing (B) a water-dispersible polymer (water-dispersible polymer), (C) an ultraviolet shielding agent (UV shielding agent), (D) a particle coating material, and (E) a solvent compatible with water (water-compatible solvent).

[0031] Hereinafter, each component to be mixed will be described.

[0032] [(A) Polyurethane]

[0033] The main component of the external preparation composition of the present invention is (A) polyurethane (also referred to as polyurethane polymer), and for example, a water-soluble polyurethane polymer used in the development of cosmetics can be used.

[0034] Usually, polyurethane polymer is generated by the addition polymerization of difunctional or more polyisocyanates and difunctional or more polyols. (A) polyurethane in the external preparation composition of the present invention is not limited to this, but also includes various modified polyurethane polymers and polymers containing part of polyurethane bonds. For example, modified polyurethane polymers include polyurethane 34 and polyurethane 59, and the polymer containing part of polyurethane bonds includes hydrophobically modified polyether polyurethane type (HEUR) polymers such as (PEG-240 / decyl tetradecyl polyether-20 / HDI) copolymers etc. In addition, polyurethane-1, (PPG-17 / IPDI / DMPA) copolymers, (PPG-12 / SMDI) copolymers, PPG-12 etc. can also be preferably used.

[0035] The mixing amount of component (A) is preferably 2.5 to 25 wt.%. When the mixing amount is less than 2.5 wt.%, the polymer film described below cannot be formed and the UV protection effect is insufficient. When the mixing amount exceeds 25 wt.%, the coating film tends to be uneven and there will be residues when applying, resulting in poor feel during use.

[0036] When the polyurethane (A) is added to the external preparation composition of the present invention, it is preferably in the form of a solution having a concentration of 30 to 40%.

[0037] The topical preparation composition of the present invention comprises (A) polyurethane and (B) water-dispersible polymer, and these polymer formulations form a polymer film (coating film) having ultraviolet protection ability on the skin after drying. The polymer film has good ductility and a natural wearing feeling. In addition, even if it is not reapplied for a long time during the day, a continuous ultraviolet protection effect can be obtained.

[0038] In addition, although polyurethane polymers have high flexibility and excellent adhesion to the skin, if the film layer curls and peels off after film formation, it will affect the appearance. In addition, it is easy to clog the nozzle during spraying, and since the clogged polymer is not soluble in any solvent, there is a problem that the nozzle cannot be used.

[0039] Compared with the above problems, the inventors of the present invention have studied the amount of polyurethane polymer used in detail and found that if it is not sought to be peeled off as a continuous film, by reducing the amount of polyurethane polymer used, it is possible to achieve a formulation of an external preparation composition that is easier to remove, has a good feel and does not require reapplication during the day, and the formulation of the composition has excellent ultraviolet protection ability.

[0040] That is, a very suitable result can be obtained when the compounding amount of the (A) polyurethane is within the above range.

[0041] [(B) Water-dispersible polymer]

[0042] The external preparation composition of the present invention further contains (B) a water-dispersible polymer in order to improve the water resistance and durability of the polymer film formed from (A) the polyurethane.

[0043] (B) The water-dispersible polymer includes acrylic polymers having a silicon skeleton, etc. Specifically, it includes an emulsion containing (acrylate / polytrimethylsiloxymethacrylate) copolymer and 1-lauryl polyether phosphate polymer, and a cellulose derivative containing hydrophobized hydroxypropyl methylcellulose, etc. In addition, when the (B) water-dispersible polymer is added to the external preparation composition, it is preferably a solution with a concentration of 30 to 40%.

[0044] When the (B) component is a 30% solution, the mixing amount of the (B) component is preferably 0.5 to 9 wt.%. When the mixing amount is less than 0.5 wt.%, the formed polymer film has poor friction resistance and needs to be reapplied during the day. When the mixing amount exceeds 9 wt.%, the surface may turn white after application, resulting in poor feel.

[0045] [(C) UV shielding agent]

[0046] The external preparation composition of the present invention contains (C) an ultraviolet shielding agent in order to impart an ultraviolet protection effect.

[0047] (C) Ultraviolet shielding agents include inorganic powders having UV shielding effects (scattering effects) that are generally used in sunscreen cosmetics, such as titanium oxide, zinc oxide, and the like.

[0048] The blending amount of component (C) is preferably 0.5 to 15 wt.%. When the blending amount is less than 0.5 wt.%, the UV protection effect of the external preparation composition of the present invention is insufficient. When the blending amount exceeds 15 wt.%, the coating film is prone to be uneven and residues are left during application, resulting in poor use feeling.

[0049] [(D) Particle coating material]

[0050] In addition, when titanium oxide and zinc oxide are included in the external preparation composition of the present invention as (C) ultraviolet shielding agents, (D) particle coating materials may be used as needed. Suitable particle coating materials include silicon compounds such as PEG (polyethylene glycol) or PPG (polypropylene glycol) adducts of polydimethylsiloxane, PEG-12 dimethylsiloxane, trimethylsiloxysilicic acid, dimethylsiloxane PEG-8 lauric acid (dimethylsiloxane / methylsiloxane) copolymers, and chelating agents such as phytic acid.

[0051] The mixing amount of the component (D) is preferably 5 to 13 wt.%. When the mixing amount is less than 5 wt.%, the particles of the ultraviolet shielding agent (C) will aggregate and precipitate, resulting in poor feel during use. When the mixing amount exceeds 13 wt.%, the friction resistance is poor and reapplication is required during the day.

[0052] [(E) Water-compatible solvent]

[0053] The solvent contained in the external preparation composition of the present invention is (E) a water-compatible solvent. By mixing (E) a water-compatible solvent, (A) polyurethane and (B) water-dispersible polymer can be mixed without separation, thereby achieving uniformity and rapid drying of the coating film, and making the external preparation composition have a good feeling of use.

[0054] Suitable (E) water-compatible solvents include ethanol, butanediol, pentanediol and the like.

[0055] The mixing amount of component (E) is preferably 13 to 40 wt.%. When the mixing amount is less than 13 wt.%, the polymer component cannot be completely dissolved, precipitation or aggregation will occur, and the feeling of use is not good. When the mixing amount exceeds 40 wt.%, it may cause irritation to the skin and affect safety.

[0056] [(F) Functional fillers]

[0057] In addition, the external preparation composition of the present invention may further contain (F) a functional filler as required. Examples of (F) functional fillers include silica, titanium dioxide, iron oxide, illite, cellulose particles, amino acids or amino acid derivatives such as lauroyl lysine, and combinations thereof.

[0058] The blending amount of the component (F) is not particularly limited, but is preferably 0.3 to 3.0 wt.%. When the blending amount is within the above range, the external preparation composition of the present invention can have a good ultraviolet protection effect and a good feeling during use.

[0059] For a long time, as an external agent for UV protection, many UV protection cosmetics have been commercialized on the market, and these products are usually oil-containing water-in-oil (W / O) emulsions or water-in-oil (O / W) emulsions. However, since UV screeners or UV absorbers are usually mixed in the oil phase, if you want to enhance the UV protection ability, you have to increase the content of the oil phase. In particular, water-in-oil (W / O) emulsions, because the external phase is the oil phase, have a strong greasy feeling when used, are sticky after application, and have a poor sense of use, and because the external phase has no film-forming property, the friction resistance is poor. In addition, although water-in-oil (O / W) emulsions have a more refreshing feeling than water-in-oil emulsions, since UV screeners are difficult to stably mix in the formula, they can only rely on UV absorbers to achieve UV protection, which increases the risk of causing allergies and is not safe enough.

[0060] In addition, oil-in-water (O / W) emulsions not only feel greasy due to the oil phase that dissolves the UV absorber, but also often have to be mixed with a large amount of polyols with high wettability to ensure the stability of the formula, resulting in a strong sticky feeling when used in a humid environment. In addition, emulsion preparations have poor anti-friction properties regardless of the oil phase or the water phase, so users are usually advised to reapply during the day.

[0061] In summary, in conventional techniques, in order to achieve an external preparation composition for the purpose of ultraviolet protection, an ultraviolet shielding agent or an absorbent is usually dissolved in oil and mixed, and it is very difficult to stably mix the ultraviolet shielding agent directly into an aqueous phase containing a polymer. In order to stably mix the external preparation composition of the present invention into water containing a polymer, the following successful results were obtained after in-depth research, in which the ultraviolet shielding agent was stably mixed into the water containing the polymer after the coating agent was treated.

[0062] External preparation composition of the present invention is by (C) UV-screening agent is directly dispersed in the aqueous solution containing (A) polyurethane and carries out formula modulation (usually UV-screening agent is dispersed in oil phase, or UV absorber is dissolved in oil phase and carries out formula modulation), therefore does not have greasy feeling when applying.In addition, by careful study of various polymers, it is found that polyurethane polymer is most suitable because it possesses the flexibility close to skin and good skin conformability (adhesion to skin).Therefore, external preparation composition of the present invention has the natural use feeling close to skin because it is composed of the polyurethane polymer containing the hydrogen bond similar to the amide bond in the skin protein structure.

[0063] In addition, in general sunscreen cosmetics, in oil-in-water (O / W) emulsions, UV screeners are usually mixed only in oil droplets dispersed in the water phase. However, since the water phase content is usually above 50% and the oil phase is relatively small, it is difficult to effectively mix (mix) enough UV screeners, so a method of using UV absorbers with safety concerns to enhance UV protection is used. On the other hand, in water-in-oil (W / O) emulsions, since the oil phase is a continuous matrix and UV screeners are mixed therein, the UV absorption effect can be exerted, but since the continuous phase is the oil phase, it feels greasy when used and has a poor feel.

[0064] In contrast, the topical preparation composition of the present invention can effectively block ultraviolet rays by dispersing the (C) ultraviolet shielding agent in a single continuous matrix. In addition, just because it can effectively block ultraviolet rays, the amount of the (C) ultraviolet shielding agent can also be reduced, thereby alleviating the discomfort caused by mixing a large amount of the (C) ultraviolet shielding agent and the problem of unnatural use.

[0065] In addition, the topical preparation composition of the present invention forms a polyurethane polymer film that retains (C) ultraviolet shielding agent after drying on the skin, so it has higher durability compared with general sunscreen cosmetics containing a large amount of oil. In addition, compared with sunscreen cosmetics containing not only ultraviolet shielding agent but also ultraviolet absorber, there is no need to apply ultraviolet absorber that may cause skin allergy, and there is no need to reapply. Since ultraviolet absorber is mostly an oily component, oil or oil-soluble liquid is usually required as a solvent when used, and the topical preparation composition of the present invention does not need these components, so the topical preparation composition of the present invention has better durability after being applied to the skin.

[0066] <How to use>

[0067] The external preparation composition of the present invention can be used not only on the whole face but also on the body. In addition, it can be applied by spraying or by fingers, and the application method is not particularly limited.

[0068] Furthermore, after drying on the skin, the external preparation composition of the present invention forms a so-called artificial skin membrane which is soft, adhesive (adhesive), elastic and durable. The thickness of the artificial skin membrane formed by the external preparation composition of the present invention is preferably in the range of 3 to 200 microns.

[0069] However, the external preparation composition of the present invention (and the artificial skin formed therefrom) can be easily removed by a nonwoven fabric or paper towel containing water or ethanol or polyol, and can also be easily removed by a common foam type cleansing product.

[0070] <Sunscreen cosmetics>

[0071] Since the external preparation composition of the present invention can form the artificial skin as described above and has an ultraviolet protection effect, the external preparation composition of the present invention can be used alone as a sunscreen cosmetic, or can be added as an ingredient to other cosmetics to impart an ultraviolet protection effect thereto. Therefore, one embodiment of the present invention is a sunscreen cosmetic comprising the external preparation composition.

[0072] In addition, the topical preparation composition of the present invention and the sunscreen cosmetic containing the topical preparation composition of the present invention preferably do not include the case where the oil agent is used as an emulsion, but the essential component (D) particle coating material of the topical preparation composition contains an amphiphilic component containing a silicon-based oily functional group. In addition, the (D) particle coating material may contain silicone resin, and therefore may sometimes inadvertently contain oil agents such as silicone oil. Furthermore, the oil-soluble vitamins and the like added to the (H) other components described later are blended therein as fillers contained in ordinary oil agents, and therefore, the topical preparation composition of the present invention may inadvertently contain a small amount of oil agents. Taking into account these small amounts of oil agents, the oil content in the sunscreen cosmetic of the present invention is preferably 5.0wt.% or less.

[0073] In conventional water-in-oil (W / O) emulsions or oil-in-water (O / W) emulsion cosmetics, a large amount of oil is usually added and mixed, and in order to form an emulsion, a large amount of amphiphilic surfactants need to be added, but amphiphilic surfactants eventually reduce the anti-friction property. The external preparation composition of the present invention and the sunscreen cosmetics comprising the external preparation composition of the present invention do not want to contain an oil as an emulsion, so the overall oil content is less, thereby enhancing the anti-friction property (wear resistance).

[0074] [(G) Colored powder]

[0075] In addition, by dispersing the (G) colored powder (pigment) in the artificial skin in advance, the external preparation composition of the present invention can also play the role of base makeup or foundation, and can also adjust the skin color. The external preparation composition of the present invention also has sufficient durability when used alone, and other cosmetics can be superimposed thereon with a brush, a puff or a finger without damaging the film. In addition, in addition to having the function of ultraviolet protection, it can also play the role of adjusting the skin color.

[0076] (G) Examples of the colored powder include titanium oxide, iron oxide, aluminum oxide, silicon dioxide, and the like, and combinations thereof.

[0077] The blending amount (ratio) of the component (G) is not particularly limited, but is preferably 0 to 4.0 wt.%. Within this blending amount range, the external preparation composition can fully function as a base makeup or foundation.

[0078] [(H) Other ingredients]

[0079] In addition, in order to improve the ultraviolet protection ability, colorability, sprayability or provide storage stability, or to impart other effects, the external preparation composition of the present invention may be added with ingredients commonly used in cosmetics or skin external preparations within the scope that does not impair the effects of the present invention. These ingredients include but are not limited to surfactants, moisturizers, whitening agents, pigments, alcohols, amino acids, vitamins, viscosity regulators, preservatives, antibacterial agents, antioxidants, fragrances, cosmetic ingredients, electrolytes, pH regulators, fibers, plant extracts, water, etc.

[0080] In summary, according to the present invention, there is provided an external preparation composition which can achieve both UV protection effect and the need for repeated application during the day, and is easy to remove after use and has an excellent feel, and a sunscreen cosmetic containing the external preparation composition.

[0081] In addition, as described above, the external preparation composition of the present invention can also be applied to the skin as artificial skin by drying, forming a stretchable film, and cosmetics can be superimposed thereon, in addition to the UV protection effect. In addition, this artificial skin film can also be easily removed by tearing or using a small amount of water or other cleaning agents.

[0082] [Example]

[0083] The present invention is described in more detail below by way of examples, but the present invention is not limited to these examples. The mixing amounts (ratios) in the following examples are expressed as mass percentage (wt.%) unless otherwise specified.

[0084] <Test 1: Study on the mixing amount of each component>

[0085] The external preparation compositions of Examples 1 to 10 and Comparative Examples 1 to 4 were prepared according to the mixing amounts shown in Table 1. Then, the prepared external preparation compositions of Examples 1 to 10 and Comparative Examples 1 to 4 were evaluated according to the following method.

[0086] (Ease of removal after use)

[0087] The ease of removal after use (after application) of the external preparation compositions of Examples 1 to 10 and Comparative Examples 1 to 4 was evaluated.

[0088] On a 4.0 cm × 4.0 cm acrylic resin plate, the 2 The external preparation composition of each example was applied in an amount of, and after it dried to form an artificial skin, it was wiped with a wet wipe containing butylene glycol. According to the residual amount of the external preparation composition on the board after wiping with the wet wipe, it was evaluated in two levels according to the following standards.

[0089] ○: Can be completely removed by wiping with wet wipes

[0090] ×: There is still a film or artificial skin left after wiping with wet wipes, and it cannot be completely removed without using cleansing cosmetics.

[0091] (Necessity of re-coating)

[0092] The external preparation compositions of Examples 1 to 10 and Comparative Examples 1 to 4 were evaluated based on the standard of abrasion resistance to determine whether they needed to be re-coated all day (necessity of re-coating). The external preparation compositions of each example were applied to an acrylic resin plate having a size of 4.0 cm×4.0 cm in an amount of about 1.25 mg per square centimeter. After drying, artificial skin was formed. After formation, a dry Kimwipe was used to wipe 10 times longitudinally and 10 times transversely to evaluate whether it was easy to fall off (abrasion resistance). Evaluation was divided into two levels according to the following criteria.

[0093] (Evaluation of abrasion resistance)

[0094] ○: Does not easily fall off after wiping

[0095] ×: Easily falls off after wiping

[0096] (Feeling of use)

[0097] The external preparation compositions of Examples 1 to 10 and Comparative Examples 1 to 4 were evaluated for feel based on three criteria: uniformity of the coating film, presence of shavings during application, and drying speed.

[0098] The external preparation composition of each example was applied to an acrylic resin plate having a size of 4.0 cm×4.0 cm at an amount of about 1.25 mg per square centimeter. At this time, the uniformity of the coating film during application, the presence of crumbs (scum) during application, and the drying speed were evaluated and evaluated in two levels according to the following criteria.

[0099] (Evaluation of coating uniformity)

[0100] ○: The coating is uniform after application

[0101] ×: The coating film is mottled after application

[0102] (Evaluation of the presence or absence of dust during application)

[0103] ○: No crumbs when applied

[0104] ×: Crumbs are generated when applying

[0105] (Evaluation of drying speed)

[0106] ○: The time required for water to evaporate and form artificial skin is no more than 60 seconds

[0107] ×: It takes more than 60 seconds for water to evaporate and form artificial skin

[0108] (Comprehensive evaluation)

[0109] Taking the above-mentioned evaluations into consideration, a comprehensive evaluation was performed. A case where all evaluations were "○" was marked as "◎", a case where there was one "×" was marked as "○", and a case where there were two or more "×" was marked as "×".

[0110] The above evaluation results, as well as the formulations of the embodiments and comparative examples are shown in Table 1 below.

[0111]

Table 1

[0112]

[0113]

[0114] As shown in Table 1, although some of the external preparation compositions of Examples 1 to 10 were insufficient in terms of abrasion resistance or coating uniformity, most of them were easy to remove after use and had excellent abrasion resistance, so no re-application was required, and the feeling of use was also good. In addition, the overall evaluation was excellent (◎) or good (○).

[0115] On the other hand, the ease of removal after use, the necessity of re-application (abrasion resistance), and the feeling of use of the external preparation compositions of Comparative Examples 1 to 4 were mostly poor, and the overall evaluation was poor (×). In addition, the external preparation composition of Comparative Example 4 had agglomeration and precipitation of particles, making it impossible to disperse the particles.

[0116] <Test 2: Comparison between W / O and O / W>

[0117] In addition to Example 4 in Test 1, the external preparation compositions of Comparative Examples 5-6 were newly prepared according to the formulation amounts recorded in Table 3. Then, the external preparation compositions of Example 4 and Comparative Examples 5-6 prepared were evaluated for ease of removal after use, necessity of re-application, and feel of use according to the method of Test 1, but the feel of use was evaluated based on three criteria: oiliness, stickiness of the skin after application, and glossiness during use. In addition, the external preparation compositions of Example 4 and Comparative Examples 5-6 were measured for SPF and UVAPF, and a comprehensive evaluation was performed taking these results into consideration. In addition, except for the new evaluation and measurement, the evaluation method and criteria were the same as those of Test 1.

[0118] (Necessity of re-coating)

[0119] Simultaneously with Test 1, whether or not all-weather (daytime) re-coating is necessary (necessity of re-coating) is evaluated from the standard of abrasion resistance.

[0120] On an acrylic resin plate measuring 4.0 cm x 4.0 cm, the external preparation composition of each example was applied in an amount of about 1.25 mg per square centimeter. After drying, a dry Kimwipe was used to wipe 10 times vertically and 10 times horizontally, and the weight before and after the friction test was measured (number of tests: N = 4).

[0121] (Feeling of use)

[0122] Similar to Test 1, the feeling of use was evaluated based on three criteria: oiliness, stickiness after application, and glossiness during use. The evaluation was conducted by 6 evaluators, including 1 male and 5 females.

[0123] The stickiness after drying and the glossiness during wearing were evaluated in two levels according to the following criteria.

[0124] (Sticky feeling after drying)

[0125] ○: No stickiness after drying

[0126] ×: Sticky feeling after drying

[0127] (Glossiness when worn)

[0128] ○: No gloss when worn

[0129] ×: Glossy feeling when worn

[0130] (Determination of SPF and UVAPF)

[0131] The same amount of the external preparation composition as in each evaluation was applied on a plate and dried, and then SPF and UVAPF were measured using an SPF analyzer (Labsphere UV-2000S).

[0132] The above evaluation results and measurement results, as well as the formulations of the embodiments and comparative examples are shown in Table 2 below.

[0133]

Table 2

[0134]

[0135]

[0136] As shown in Table 2, the external preparation composition of Example 4 is easy to remove after use, has almost no reduction in abrasion resistance evaluation (i.e., excellent abrasion resistance), has a good feel in use, and has excellent ultraviolet protection ability (ultraviolet protection function). In addition, the comprehensive evaluation is also excellent (◎).

[0137] On the other hand, the external preparation compositions of Comparative Examples 5 to 6 were reduced by 6 to 13 times or more in the abrasion resistance evaluation compared with Example 4 (i.e., the abrasion resistance was poor), and Comparative Example 5 was poor in ultraviolet protection ability and feel during use (especially the sticky feeling and glossiness during use), and Comparative Example 6 was poor in ease of removal after use and feel during use, and the comprehensive evaluation was poor (×).

[0138] <Test 3: Comparison of UV shielding agents>

[0139] Based on Example 4 in Test 1, the external preparation compositions of Examples 11 to 12 and Comparative Example 7 were newly prepared according to the formulation amounts recorded in Table 3. Then, the external preparation compositions of Examples 4, 11 to 12 and Comparative Example 7 prepared were evaluated for ease of removal after use, necessity of re-application and feeling of use according to the method of Test 1, and SPF and UVAPF were further measured, and a comprehensive evaluation was performed based on these results. The evaluation method and criteria were the same as those of Test 1.

[0140] The above evaluation results and measurement results, as well as the formulations of the embodiments and comparative examples are shown in Table 3 below.

[0141]

Table 3

[0142]

[0143] As shown in Table 3, the external preparation compositions of Examples 4, 11 and 12 are all easy to remove after use, have excellent abrasion resistance, and therefore do not need to be reapplied, have excellent feel in use, and have good UV protection capabilities overall. In addition, the overall evaluation is also excellent (◎).

[0144] On the other hand, although the external preparation composition of Comparative Example 7 was good in terms of ease of removal after use, necessity of re-application (abrasion resistance), and feel during use, it was clearly insufficient in terms of ultraviolet protection capability and was comprehensively evaluated as poor (×).

[0145] Although the present invention has been described in detail above, the present invention is not limited to the above description, and various modifications and changes can be made within the scope of the claims.

Claims

1. An external preparation composition for UV protection, characterized in that: The invention comprises (A) polyurethane as a main component and contains the following components: (B) a water-dispersible polymer, (C) an ultraviolet shielding agent, (D) a particle coating material, and (E) a solvent miscible with water.

2. The external preparation composition according to claim 1, wherein The proportion of the component (A) is 2.5 to 25 wt.%.

3. The external preparation composition according to claim 1, wherein The proportion of the component (D) is 5 to 13 wt.%.

4. The external preparation composition according to claim 1, wherein The proportion of the component (C) is 0.5 to 15 wt.%.

5. The external preparation composition according to claim 1, wherein When the component (B) is a 30% concentration solution, the proportion of the component (B) is 0.5 to 9 wt.%.

6. The external preparation composition according to claim 1, wherein The proportion of the component (E) is 13 to 40 wt.%.

7. A sunscreen cosmetic comprising the external preparation composition according to claim 1.

8. The sunscreen cosmetic according to claim 7, wherein: The content of the oil agent is 5.0 wt.% or less.

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