Oil-in-water emulsion cosmetics

Abstract

To provide an oil-in-water type emulsion cosmetic that can maintain moist feeling until the next morning without feeling sliminess or stickiness after application, and does not contain antiseptic agent.SOLUTION: Provided is a composition being an oil-in-water type emulsion cosmetic containing no antiseptic agent in which one or more kinds selected from 1,3-butylene glycol, pentylene glycol, propylene glycol and dipropylene glycol are blended by the total amount of 12 to 20 wt.%, where the cosmetic contains: (A) sucrose fatty acid ester consisting of linear saturated fatty acid having a carbon number of 16 or more: (B) Theobroma grandiflorum seed butter; (C) (phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate; and (D) macadamia nut oil polyglyceryl-6 esters behenate, by which moist feeling can be maintained until the next morning without feeling sliminess or stickiness after application.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a preservative-free oil-in-water emulsion cosmetic which does not leave a sticky or slippery feeling after application and can maintain a moist feeling until the next morning. [Background technology]

[0002] In recent years, the number of consumers who are aware that they have sensitive skin has been increasing. Sensitive skin is said to be skin that generates unpleasant sensations that are not usually caused, such as itching, pain, and tingling, in response to stimuli, and the main characteristics of sensitive skin include a decrease in barrier function, a decrease in stimuli threshold, and potential inflammatory pathology. As a result of a survey on sensitive skin awareness among Japanese women, it was reported that approximately 77% of the consumers surveyed were aware that their skin was sensitive (Non-Patent Document 1).

[0003] For sensitive skin, even common cosmetic ingredients can cause irritation, so consumers with sensitive skin are looking for products that contain as few unnecessary ingredients as possible. In particular, preservatives can cause sensory irritation such as temporary itching and stinging on the skin, and are said to be one of the main causes of skin inflammation and contact allergies, so consumers with sensitive skin are looking for cosmetics that do not contain preservatives. However, microbial contamination of cosmetics during the manufacturing stage and during their use by consumers can cause spoilage and deterioration, resulting in quality deterioration such as odor and discoloration, as well as the risk of health damage to the human body. For this reason, it is essential to impart preservative effects to cosmetics. For this reason, polyhydric alcohols and alcohols that have the same preservative effects as preservatives are generally used in cosmetics that do not contain preservatives, but polyhydric alcohols can cause a sticky or sticky feeling after application, and alcohol can cause irritation and dryness for consumers with sensitive skin.

[0004] In addition, many people with sensitive skin have dry skin, and moisturizing is considered essential for sensitive skin accompanied by dry skin. Furthermore, general consumers also want products that moisturize the skin, protect the skin from various stimuli, and maintain the skin's barrier function. Skin topicals that have such effects include basic cosmetics such as emulsions, creams, beauty essences, and packs.

[0005] In these basic cosmetics, emollients and polyhydric alcohols have traditionally been used to improve the moist feeling on the skin after application. However, when these are blended in large amounts, the skin feels sticky and unsatisfactory after application.

[0006] Furthermore, in the case of oil-in-water emulsion cosmetics, after application to the skin, it is inevitable that the aqueous components of the cosmetics applied to the face will gradually evaporate. Also, the cosmetics applied to the face are easily removed due to physical friction during sleep. Due to such phenomena, it is difficult to maintain the moist feeling of the skin after application until the next morning.

[0007] Examples of cosmetics that contain a large amount of paste-like oil and have an excellent moisturizing feeling include vegetable oils that are solid or pasty at 25°C, a monoester that is liquid at 25°C, which is an ester of a fatty acid having 8 to 22 carbon atoms and a monohydric alcohol having 2 to 22 carbon atoms, where at least one of the fatty acid or monohydric alcohol constituting the ester has a branched or double bond, and an oil-in-water emulsion cosmetic that contains one selected from sorbitan, glycerin, and diglycerin, a monoester or diester of a fatty acid having 12 to 18 carbon atoms, and a polyhydric alcohol (Patent Document 1), but this has not yet succeeded in maintaining the moisturizing feeling until the next morning. Furthermore, as an example of a cosmetic preparation that is not sticky after application and has excellent long-lasting moisturizing sensation, there is known a cosmetic preparation (Patent Document 2) that contains 1 to 10% by weight of nicotinamide, 0.1 to 5% by weight of bisethoxydiglycol cyclohexane-1,4-dicarboxylate, one or more surfactants selected from nonionic surfactants, anionic surfactants, and amphoteric surfactants, liquid oil, and a polyhydric alcohol having an IOB of 2.2 to 3.4, but this does not improve the slippery feeling after application. [Prior art documents] [Patent documents]

[0008] [Non-Patent Document 1] Fragrance Journal (May 2019) P.42-46 [Patent Document 1] JP 2016-166187 A [Patent Document 2] JP 2019-131492 A Summary of the Invention [Problem to be solved by the invention]

[0009] By incorporating one or more types of preservatives selected from 1,3-butylene glycol, pentylene glycol, propylene glycol, and dipropylene glycol without incorporating a preservative such as paraben, it is possible to provide an oil-in-water emulsion cosmetic that has sufficient preservative effect. However, incorporating a large amount of these substances can cause the cosmetic to feel slippery or sticky.

[0010] Therefore, an object of the present invention is to provide an oil-in-water emulsion cosmetic preparation that does not contain a preservative, does not leave a sticky or slippery feeling after application, and can maintain a moist feeling until the next morning. [Means for solving the problem]

[0011] That is, the present invention relates to a composition containing 12 to 20% by weight of one or more selected from 1,3-butylene glycol, pentylene glycol, propylene glycol and dipropylene glycol, and the composition further comprising the following components (A) to (D): (A) Sucrose fatty acid ester composed of linear saturated fatty acids with 16 or more carbon atoms (B) Theobroma grunge florum seed fat (C) Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) (D) Macadamia nut oil polyglyceryl-6 esters behenate The present invention provides an oil-in-water emulsion cosmetic which is characterized by containing the above and not containing any preservatives.

[0012] The present invention also provides an oil-in-water emulsion cosmetic comprising (B) to (D) and having a weight ratio of oil that is pasty at 25° C. to oil that is liquid at 25° C. (liquid oil / paste oil) of 1.5 to 3.5. Effect of the Invention

[0013] The present invention aims to provide an oil-in-water emulsion cosmetic that does not contain a preservative and can maintain a moist feeling until the next morning without causing a slippery or sticky feeling after application. BEST MODE FOR CARRYING OUT THEINVENTION

[0014] The sucrose fatty acid ester, component (A) used in the present invention, which is composed of a linear saturated fatty acid having 16 or more carbon atoms, functions as an emulsifier in the oil-in-water emulsion cosmetic of the present invention, and any sucrose fatty acid ester used in ordinary cosmetics can be used. A commercially available sucrose fatty acid ester can be used, and commercially available products such as Surfhope SE COSME C-1816 or Surfhope SE COSME C-1616 manufactured by Mitsubishi Chemical Foods Corporation can be used.

[0015] The content of (A) sucrose fatty acid ester composed of linear saturated fatty acid having 16 or more carbon atoms is not particularly limited, but is preferably 1.0 to 5.0% by weight, more preferably 2.5 to 3.5% by weight, based on the oil-in-water emulsion cosmetic. If it is less than 1.0% by weight, the stability over time may be poor. On the other hand, if it exceeds 5.0% by weight, the oil-in-water emulsion cosmetic may become hard and difficult to spread.

[0016] Theobroma grandiflorum seed oil, component (B) used in the present invention, is a plant-derived ester that has high water-holding capacity and excellent moisturizing properties. Commercially available products include, for example, Cropure Cupas-SO-(JP) manufactured by Croda Japan.

[0017] The content of (B) Theobroma grandiflorum seed butter is not particularly limited, but is preferably 4.0 to 7.0% by weight, more preferably 5.0 to 6.0% by weight, relative to the oil-in-water emulsion cosmetic. Within these ranges, the effect of maintaining a moist feeling until the next morning without a sticky feeling after application can be sufficiently obtained.

[0018] The component (C) dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) used in the present invention is a plant-derived ester that has high water-holding capacity and excellent moisturizing properties. Commercially available products include Plandool-H manufactured by Nippon Fine Chemicals Co., Ltd.

[0019] The content of (C) dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) is not particularly limited, but is preferably 1.0 to 5.0% by weight, more preferably 2.0 to 4.0% by weight, based on the oil-in-water emulsion cosmetic. Within these ranges, the effect of maintaining a moist feeling until the next morning without feeling sticky after application can be sufficiently obtained.

[0020] The component (D) macadamia nut oil polyglyceryl-6 ester behenate used in the present invention is a type of polyglycerin fatty acid ester, and has excellent moisturizing properties. For example, S-Face VL-211 manufactured by Sakamoto Yakuhin Kogyo Co., Ltd. can be used as a commercially available product.

[0021] The content of (D) macadamia nut oil polyglyceryl-6 esters behenate is not particularly limited, but is preferably 0.1 to 1.0% by weight, more preferably 0.3 to 0.7% by weight, based on the oil-in-water emulsion cosmetic. Within these ranges, the effect of maintaining a moist feeling until the next morning without feeling sticky after application can be sufficiently obtained.

[0022] The oily component in a paste form at 25°C of the present invention is not particularly limited, and examples thereof include hydrocarbons, vegetable oils, mineral oils, higher fatty acid esters, crosslinked silicone oils, etc. Specific examples include petrolatum, macadamia nut oil fatty acid phytosteryl, hydroxystearate phytosteryl, hexa(hydroxystearic acid / stearic acid / rosin acid) dipentaerythrityl, etc. These oily components in a paste form at 25°C may be used alone or in combination of two or more kinds. The oily component in a paste form at 25°C in the present invention is a semi-solid oily component that has a melting point at a temperature higher than 25°C and does not completely solidify at 25°C, and is distinguished from liquid and solid oily components.

[0023] The oily component liquid at 25°C of the present invention is not particularly limited, but may be, for example, a hydrocarbon, a vegetable oil, an ester oil, or a silicone oil. Specific examples include mineral oil, squalane, hydrogenated polyisobutene, olefin oligomer, jojoba oil, olive oil, macadamia nut oil, meadowfoam oil, shea oil, octyldodecyl myristate, isononyl isononanoate, isostearyl isostearate, trimethylolpropane triisostearate, neopentyl glycol dicaprate, tri(caprylic acid / capric acid)glyceryl, diisostearyl malate, dimethicone, diphenylsiloxyphenyl trimethicone, and cyclopentasiloxane. These oily components liquid at 25°C may be used alone or in combination of two or more.

[0024] The weight ratio (liquid oil / paste oil) of the oil that is pasty at 25° C. and contains (B) to (D) to the oil that is liquid at 25° C. is preferably 1.5 to 3.5. Within this range, it is possible to obtain an oil-in-water emulsion cosmetic that does not feel sticky or greasiness after application and provides a moist feeling that lasts until the next morning.

[0025] In addition to the above-mentioned essential components, the oil-in-water emulsion cosmetic of the present invention can contain components used in ordinary cosmetics, such as nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, aqueous components, water-soluble polymers, antioxidants, UV absorbers, powders, fragrances, chelating agents, colorants, cosmetic ingredients, etc., within the range that does not impair the effects of the present invention. Furthermore, the oil-in-water emulsion cosmetic of the present invention can be provided in the form of a cream, milky lotion, etc. EXAMPLES

[0026] The present invention will be described in detail below with reference to examples, but the technical scope of the present invention is not limited to these. Note that all contents are expressed in weight % unless otherwise specified.

[0027] Oil-in-water emulsion cosmetics having the compositions shown in Tables 1 and 2 below were prepared by the manufacturing method described below, and a panel of 20 female experts evaluated the usability of each cosmetic (moist feeling immediately after application, slippery feeling after application, stickiness after application, moist feeling 8 hours after application).

[0028] (Manufacturing method) (A) Sucrose fatty acid ester, glycerin were mixed uniformly, and then heated and mixed (B) Theobroma grandiflorum seed oil, (C) dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), and (D) an oil phase containing macadamia nut oil polyglyceryl-6 esters behenate were mixed and heated to 80°C. Meanwhile, an aqueous phase containing 1,3-butylene glycol and pentylene glycol was heated to 80°C, added to the oil phase, emulsified, and cooled to obtain an oil-in-water emulsion cosmetic. The pH of the 1% aqueous solution of the sample after preparation was adjusted to 7.0 to 7.5.

[0029] (Evaluation method) Usability (moisturizing feeling immediately after application) A panel of 20 female experts judged the moist feeling immediately after application on a two-point scale of "yes" or "no," and rated according to the following criteria. ◎: 18 or more people rated it as having a moist feeling. ○: 14 to 17 people rated it as having a moist feeling. △: 9 to 13 people rated it as having a moist feeling. ×: Eight or fewer people rated it as having a moist feeling.

[0030] Usability (cheating) A panel of 20 female experts judged the stickiness after application on a two-point scale, "sticky" or "not sticky," and rated according to the following criteria. ◎: 18 or more people rated it as not slippery. ○: 14 to 17 people rated it as not slippery. △: 9 to 13 people rated it as not slippery. ×: Fewer than 8 people rated it as not cheating.

[0031] Usability (stickiness) A panel of 20 female experts judged stickiness after application on a two-point scale of "yes" or "no," and rated according to the following criteria. ⊚: 18 or more panelists rated it as not sticky. ○: 14 to 17 people rated it as not sticky. △: 9 to 13 panelists rated it as not sticky. ×: Eight or fewer people rated the product as not sticky.

[0032] Usability (lasting moist feeling) A panel of 20 female experts assessed the moist feeling 8 hours after application on a two-point scale of "yes" or "no," according to the following criteria: ◎: 18 or more people rated it as having a moist feeling. ○: 14 to 17 people rated it as having a moist feeling. △: 9 to 13 people rated it as having a moist feeling. ×: Eight or fewer people rated it as having a moist feeling.

[0033] As shown in Examples 1 to 7 in Table 1, when sucrose stearate or sucrose palmitate was contained, satisfactory results were obtained in all the items evaluated. On the other hand, as shown in Comparative Examples 1 and 2, when sucrose stearate or sucrose palmitate was not contained, satisfactory results were not obtained in terms of stickiness after application.

[0034] [Table 1] *1 Surf Hope SE COSME C-1816 (manufactured by Mitsubishi Chemical Foods Corporation) *2 Surf Hope SE COSME C-1616 (manufactured by Mitsubishi Chemical Foods Corporation) *3 Surf Hope SE COSME C-1216 (manufactured by Mitsubishi Chemical Foods Corporation) *4 NIKKOL Decaglyn 1-SV (manufactured by Nikko Chemicals) *5 ODM (Koyu Alcohol Kogyo Co., Ltd.) *6 Clopure Cupas-SO-(JP) (manufactured by Cloda Japan) *7 Plandool-H (manufactured by Nippon Fine Chemicals) *8 S-Face VL-211 (manufactured by Sakamoto Pharmaceuticals) *9 Behenyl alcohol (Kyushu Alcohol Kogyo Co., Ltd.)

[0035] As shown in Examples 8 to 18 in Table 2, when theobroma grandiflorum seed butter, dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) and macadamia nut oil polyglyceryl-6 esters behenate were contained, satisfactory results were obtained in all the items evaluated. On the other hand, as shown in Comparative Examples 3 to 5, when theobroma grandiflorum seed butter, dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) and macadamia nut oil polyglyceryl-6 esters behenate were not contained, satisfactory results were not obtained in terms of slippery feeling, stickiness and moist feeling 8 hours after application.

[0036] [Table 2] *10 CROLATUM V (manufactured by Croda Japan) *11 Shea Butter RF (Kyoto Alcohol Industry Co., Ltd.)

[0037] Next, other examples of the present invention will be shown. All of the examples were excellent in terms of moist feeling immediately after application, slippery feeling and stickiness after application, and moist feeling 8 hours after application.

[0038] Example 19: Cream 1 (Ingredients) (Weight%) (1) Sucrose stearate *1 3.0 (2) Glycerin 6.0 (3) Liquid paraffin 10.0 (4) Isotridecyl isononanoate *12 10.0 (5) Meadowfoam oil *13 2.0 (6) Theobroma grandiflorum seed oil *6 5.0 (7) Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) *7 2.0 (8) Macadamia nut oil polyglyceryl-6 esters behenate *8 0.3 (9) Hydrogenated rapeseed oil alcohol *14 1.0 (10) Purified water remainder (11) Carbomer 0.28 (12) 1,3-butylene glycol 10.0 (13) Pentylene glycol 2.0 (14) Neutralizer (appropriate amount) *12 KAK 139 (Kyushu Alcohol Kogyo Co., Ltd.) *13 Cropure Medfoam-LQ-(JP) (manufactured by Croda Japan) *14 Alcohol No. 20B (Kyushu Alcohol Kogyo Co., Ltd.)

[0039] (Manufacturing method) Ingredients (1) and (2) were mixed uniformly, and (3) to (9) that had been mixed uniformly at 80°C were added and heated to 80°C. Meanwhile, (10) to (14) that had been mixed uniformly and heated to 80°C were slowly added to (1) to (9) and emulsified. The mixture was then cooled to 35°C to obtain the desired cream 1.

[0040] Example 20: Cream 2 (Ingredients) (Weight%) (1) Sucrose stearate *1 2.5 (2) Glycerin 7.0 (3) Squalane 5.0 (4) Jojoba seed oil 10.0 (5) Hydrogenated polyisobutene 5.0 (6) Theobroma grandiflorum seed oil *6 6.0 (7) Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) *7 3.5 (8) Macadamia nut oil polyglyceryl-6 esters behenate *8 0.2 (9) Behenyl alcohol *9 0.5 (10) Hydrogenated rapeseed oil alcohol *14 0.5 (11) Purified water remainder (12) Carbomer 0.2 (13) (Acrylates / Alkyl acrylate (C10-30)) Crosspolymer 0.2 (14) Sodium hyaluronate 0.01 (15) 1,3-butylene glycol 10.0 (16) Pentylene glycol 2.0 (17) Neutralizer (appropriate amount)

[0041] (Manufacturing method) Ingredients (1) and (2) were mixed uniformly, and then (3) to (10) that had been mixed uniformly at 80°C were added and heated to 80°C. Meanwhile, (11) to (17) that had been mixed uniformly and heated to 80°C were slowly added to (1) to (10) and emulsified. The mixture was then cooled to 35°C to obtain the desired cream 2.

[0042] Example 21: Emulsion 1 (Ingredients) (Weight%) (1) Sucrose palmitate*2 2.0 (2) Glycerin 7.0 (3) Squalane 5.0 (4) Hydrogenated polyisobutene 6.0 (5) Theobroma grandiflorum seed oil *6 5.0 (6) Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) *7 1.0 (7) Macadamia nut oil polyglyceryl-6 esters behenate *8 0.2 (8) Behenyl alcohol *9 0.1 (9) Purified water remainder (10) Carbomer 0.15 (11) Xanthan gum 0.02 (12) Sodium hyaluronate 0.01 (13) 1,3-butylene glycol 10.0 (14) Pentylene glycol 2.0 (15) Neutralizer (appropriate amount)

[0043] (Manufacturing method) Ingredients (1) and (2) were mixed uniformly, and then (3) to (8) that had been mixed uniformly at 80°C were added and heated to 80°C. Meanwhile, (9) to (15) that had been mixed uniformly and then heated to 80°C were slowly added to (1) to (8) to emulsify. The mixture was then cooled to 35°C to obtain the intended emulsion 1. [Industrial Applicability]

[0044] According to the present invention, it is possible to provide a preservative-free oil-in-water emulsion cosmetic which does not leave a sticky or slippery feeling after application and can maintain a moist feeling until the next morning.

Claims

1. The composition contains 12 to 20% by weight of one or more selected from 1,3-butylene glycol, pentylene glycol, propylene glycol, and dipropylene glycol, and comprises the following components (A) to (D): (A) Sucrose fatty acid ester composed of linear saturated fatty acids having 16 or more carbon atoms (B) Theobroma grandiflorum seed oil (C) Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl) (D) Macadamia nut oil polyglyceryl-6 esters behenate and is free of preservatives.

2. 2. The oil-in-water emulsion cosmetic according to claim 1, wherein the weight ratio of the oil which contains (B) to (D) and is a paste at 25° C. to the oil which is a liquid at 25° C. (liquid oil / paste oil) is 1.5 to 3.5.

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