JP2013139395A - Oil-in-water type emulsified composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-in-water type emulsified composition which has excellent storage stability at high temperature and low temperature, has satisfactory sense of uses such as spreadability, skin fitness, and no stickiness and sliminess, and also has excellent continuousness of moisture retention feeling even when being highly blended with polar oil.SOLUTION: The oil-in-water type emulsified composition includes the following components (A) to (D): (A) ester oil and/or vegetable oil being liquid at 40°C of ≥5 mass% to the total amount of the composition; (B) polyoxyethylene sorbitol cerabellina; (C) higher alcohol of 3 to 12 mass% to the total amount of the composition; and (D) N-acylamino acid and/or its salt of 0.15 to 1.8 mass% to the total amount of the composition.

Description

  The present invention relates to an oil-in-water emulsified composition containing a high amount of polar oil.

  It is known that an emulsified composition containing a polar oil such as ester oil or vegetable oil does not feel sticky to use and has good spread on the skin. However, there is a problem with stability over time, such as high viscosity when the viscosity is lowered at high temperature or low temperature.

  Therefore, there is a method of increasing the viscosity of a preparation using a higher alcohol and a long-chain acylsulfonate type anionic surfactant in a cream composition containing a polar oil, and suppressing the temporal stability due to the use of the polar oil. Known (see Patent Document 1)

  On the other hand, an emulsified composition for skin having excellent temporal stability using polyoxyethylene sorbite beeswax, N-acyl glutamate, and fatty acid ester type nonionic surfactant is known (see Patent Document 2).

JP 2008-44866 A JP 2008-74784 A

  In the cream composition described in Patent Document 1, when the majority of the oil phase is made into a liquid polar oil in order to improve the feeling of use, the stability at low temperatures is significantly reduced, the feeling of use becomes watery, and the moisturizing effect However, it is difficult to ensure sufficient stability and usability. On the other hand, the emulsified composition for skin described in Patent Document 2 has a tendency to deteriorate low temperature and high temperature stability when polar oil is highly blended, and it can be said that skin conformability and spreadability of the preparation are sufficient. There wasn't.

  Therefore, the present invention has excellent high-temperature and low-temperature storage stability even when a polar oil is highly blended, has a good feeling of use such as spreadability, skin familiarity, no stickiness / smoothness, and moisturizing feeling. It is an object of the present invention to provide an oil-in-water emulsion composition excellent in sustainability.

  Therefore, the present inventor has made various studies in order to achieve both the feeling of use with polar oils such as ester oils and vegetable oils and storage stability. As a result, polyoxyethylene sorbite beeswax, higher alcohols and N-acyl amino acid anions The present inventors have found that an oil-in-water emulsion composition having both a feeling of use and storage stability can be obtained even when a polar oil is highly blended by using a specific amount of a surfactant in combination.

That is, the present invention is an oil-in-water emulsion composition containing the following components (A) to (D).
(A) Ester oil and / or vegetable oil that is liquid at 40 ° C. 5% by mass or more based on the total amount of the composition (B) Polyoxyethylene sorbit beeswax (C) Higher alcohol 3-12% by mass based on the total amount of the composition
(D) N-acylamino acid and / or salt thereof 0.15 to 1.8% by mass relative to the total amount of the composition

  The oil-in-water emulsified composition of the present invention has excellent high and low temperature storage stability even when highly blended with polar oils such as ester oils and vegetable oils, spreadability, familiarity with skin, no stickiness / smoothness, etc. The feeling of use is good and the durability of the moisturizing feeling is excellent.

  The polar oil used in the present invention is (A) ester oil and / or vegetable oil which is liquid at 40 ° C. Here, the liquid state has fluidity, and includes a cream form and a paste form.

  Examples of the ester oil include esters composed of linear or branched fatty acids and linear or branched alcohols or polyhydric alcohols. Specifically, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, Lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearylate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, monoisostearate N-alkyl glycol, neopentyl glycol dicaprate, diacid malate Isostearyl, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylotriisostearate Rupropane, tetra-2-ethylhexanoate pentaerythritol, glyceryl tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, diethylhexyl naphthalene dicarboxylate, benzoic acid ( C12-15 alkyl, cetearyl isononanoate, tri (caprylic acid / capric acid) glycerin, (dicaprylic acid / capric acid) butylene glycol, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid Methyl ester, oleyl oleate, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2-o Tildedecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, succinate Examples include di-2-ethylhexyl acid, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, 2-ethylhexyl paramethoxycinnamate, and tripropylene glycol dipivalate.

Among these, the fatty acid forming the ester is preferably an aliphatic mono- or dicarboxylic acid having 8 to 22 carbon atoms, the alcohol having 3 to 18 carbon atoms, and the polyhydric alcohol having 2 to 5 carbon atoms. Valent polyhydric alcohols are preferred.
Specifically, di-2-ethylhexyl sebacate, diisopropyl sebacate, 2-ethylhexyl paramethoxycinnamate, myristyl myristate, cetyl palmitate, glyceryl tri (capryl / caprylate), glyceryl triisostearate, tripalmitic acid Glyceryl, glyceryl tri-2-heptylundecanoate, glyceryl tribehenate, glyceryl trimyristate, triglyceride fatty acid glyceryl, glyceryl trilaurate, etc. are preferable for forming an oil-in-water emulsion system and obtaining a good feeling during use. .

  The vegetable oil may be any vegetable oil that is liquid at 40 ° C., and the production area and type of the plant, the extraction site, the compression site, the extraction method, the compression method, and the like can be used without particular limitation. Fatty acid triglycerides having 2 or more fatty acid groups having 10 to 22 carbon atoms are preferable, and fatty acid triglycerides having 3 fatty acid groups having 10 to 22 carbon atoms are particularly preferable in terms of lack of stickiness and sliminess. Examples of such vegetable oils include olive oil, macadamia nut oil, meadow foam oil, castor oil, safflower oil, sunflower oil, avocado oil, canola oil, kyounin oil, rice germ oil, and rice bran oil. In the present invention, one or more of these can be selected and used.

  Among these, olive oil, meadow foam oil, macadamia nut oil, rice bran oil and the like are preferable in forming an oil-in-water emulsion system and obtaining a good feeling during use.

  Although it does not specifically limit as a component (A) used for this invention, From the point of stability over time and a usability | use_condition, it is preferable that IOB value is 0.05-0.8, 0.1-0.1 It is more preferable that it is 0.6, and it is further more preferable that it is 0.1-0.5.

  The IOB value is an abbreviation of Inorganic / Organic Balance (inorganic / organic ratio), and is a value representing the ratio of the inorganic value to the organic value, and is an index indicating the degree of polarity of the organic compound. It will be. The IOB value is specifically expressed as “IOB value = inorganic value / organic value”. Here, for each of the “inorganic value” and “organic value”, for example, “organic value” is 20 for one carbon atom in the molecule, and “inorganic value” is 100 for one hydroxyl group. As described above, “inorganic value” and “organic value” corresponding to various atoms or functional groups are set, and “inorganic value” and “organic value” of all atoms and functional groups in the organic compound. Can be calculated to calculate the IOB value of the organic compound (see, for example, Fujita, “Chemical Domain”, Vol. 11, No. 10, pages 719 to 725, 1957).

  Although content of a component (A) is not specifically limited, 5 mass% or more is required with respect to a composition total amount from the point which improves usability, such as stickiness, and raises a spreadability, Preferably Is 5 to 30% by mass, more preferably 5 to 20% by mass, and particularly preferably 5 to 15% by mass.

In the oil-in-water emulsion composition of the present invention, an oil-in-water emulsion composition excellent in stability can be obtained even when the component (A) is highly blended in the oil phase by 30% by mass or more. Moreover, it is preferable to contain 30-60 mass% of components (A) in an oil phase from the point of the good skin familiarity, stickiness, and non-stickiness, and it is more preferable to contain 30-50 mass%.
The oil phase in the present invention means the total of components added as an oil phase when producing an oil-in-water emulsion composition, and specifically, polar oils, nonpolar oils , Oils such as silicone oil, fluorine oil, higher alcohol, higher fatty acid, and the like, and surfactants (liquid surfactants, semi-solid surfactants, solid surfactants) and the like. In addition, oil-soluble preservatives, ultraviolet absorbers, oil-soluble drugs, antioxidants, and fragrances can be included.

  In the present invention, a nonpolar oil that is liquid at 40 ° C. can be used together with the component (A). However, from the viewpoint of good skin familiarity, no stickiness / nullness, and good moisturizing feeling, 40 The content mass ratio (nonpolar oil / (A)) of the nonpolar oil that is liquid at 0 ° C. and the component (A) is preferably 0 to 0.8, and preferably 0.1 to 0.5. More preferred. In addition, (nonpolar oil / (A)) is 0 when it is a liquid nonpolar oil at 40 degreeC.

  Here, the nonpolar oil is an oil agent having an IOB value of substantially 0, preferably an oil agent having an IOB value of 0.01 or less, and more preferably 0.001 or less. Specific examples include hydrocarbon oils such as α-olefin oligomers, squalane, liquid paraffin, and petroleum jelly.

  (B) Polyoxyethylene sorbit beeswax used in the present invention is a known substance, and specific examples are components obtained by reacting beeswax with polyoxyethylene sorbitol obtained by addition polymerization of ethylene oxide to sorbitol. . Thereby, the outstanding emulsion stability can be provided. These components may be used alone or in combination of two or more. The number of moles of ethylene oxide to be polymerized is not particularly limited, but the number of moles added is preferably 4 to 25 and more preferably 6 to 20 from the viewpoint of market availability.

  The component (B) is generally commercially available, for example, NIKKOL GBW-25, in which the number of moles of ethylene oxide added is 6, NIKKOL GBW-125, in which the number of moles of added ethylene oxide is 20, Chemicals) and the like.

  Although content of a component (B) is not specifically limited, Usually, it is 0. 0 with respect to the composition total amount from the point which provides stability of an emulsion system, and the point of improving feelings of use, such as stickiness. 1-5 mass% is preferable, More preferably, it is 0.5-5 mass%.

  The (C) higher alcohol used in the present invention is a saturated or unsaturated linear or branched group having 12 or more carbon atoms represented by the formula ROH (where R is a linear or branched alkyl or alkenyl group having 12 or more carbon atoms). Of alcohol. Higher alcohol is a saturated or unsaturated linear or branched chain having 12 to 24 carbon atoms from the viewpoint of improving the stability of the emulsion preparation, the appearance of the emulsion preparation, the viscosity, spreadability when applied, softening the skin, and moisturizing effect. Alcohol is more preferable, saturated linear alcohol having 14 to 24 carbon atoms is further preferable, and saturated linear alcohol having 16 to 22 carbon atoms is further preferable. Specific examples include myristyl alcohol, cetyl alcohol, stearyl alcohol, aralkyl alcohol, behenyl alcohol, carnervir alcohol, and the like, and one or more can be used in appropriate combination.

  The content of the component (C) is not particularly limited, but is 3 to 12% by mass with respect to the total amount of the composition, preferably 3 from the viewpoint of improving skin familiarity, stickiness / stickiness. -7% by mass.

  Component (D) N-acylamino acid and / or salt thereof is a water-soluble anionic surfactant. Examples of amino acids constituting the N-acyl amino acid include glutamic acid, aspartic acid, glycine, alanine, threonine, methylalanine, sarcosine, lysine, arginine and the like. These amino acids may be L-form, D-form or DL-form. One of these may be used, or two or more selected from the above group may be mixed and used. From the viewpoints of dispersion stability and no stickiness, acidic amino acids or neutral amino acids are more preferred. Specifically, glutamic acid, aspartic acid, glycine, and alanine are more preferable, and glutamic acid is particularly preferable.

  As the acyl group constituting the N-acylamino acid, an acyl group derived from a saturated or unsaturated linear or branched fatty acid having 8 to 22 carbon atoms can be used. For example, examples of fatty acids include caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, isostearic acid, palmitic acid, oleic acid, linoleic acid, behenic acid, coconut oil fatty acid, palm oil fatty acid, and hardened beef tallow fatty acid. These may be used alone or in combination of two or more. In particular, lauric acid, myristic acid, stearic acid, coconut oil fatty acid, and palm oil fatty acid are preferable from the viewpoint of stability with time and lack of stickiness, and lauric acid, myristic acid, and stearic acid are particularly preferable.

  The salt of the N-acylamino acid is not particularly limited, and examples thereof include alkali metals such as sodium and potassium, inorganic salts such as calcium, magnesium, aluminum and zinc, and organic salts such as ammonia, monoethanolamine, diethanolamine and triethanolamine. Examples thereof include organic salts such as amines and basic amino acids such as arginine and lysine, and one or more of these can be used in combination. Sodium, potassium, triethanolamine, and arginine salts are preferred because they are readily available on the market.

  Specific examples of component (D) include coconut oil fatty acid-derived acylated glutamic acid, palm oil fatty acid-derived acylated glutamic acid, lauroyl aspartic acid, myristoyl glutamic acid, lauroyl glutamic acid, stearoyl glutamic acid, and alkali metal salts thereof. Preferred are sodium lauroyl glutamate and sodium stearoyl glutamate.

  Content with respect to the composition total amount of a component (D) is 0.15-1.8 mass%, Preferably it is 0.2-1.2 mass%. If it is in the said range, spreadability, the skin familiarity, and the glossiness of an external appearance will improve, and it is preferable.

  The oil-in-water emulsified composition of the present invention can further improve the spreadability and the glossiness of the appearance by containing (E) a higher fatty acid. Examples of the higher fatty acid used in the present invention include linear or branched chain saturated or unsaturated fatty acids having 10 to 30 carbon atoms, preferably 12 to 24 carbon atoms, which may be substituted with hydroxyl groups. It is done.

  Specific examples of fatty acids include lauric acid, palmitic acid, stearic acid, behenic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachidonic acid, isostearic acid, coconut oil fatty acid, beef tallow fatty acid, hardened beef tallow fatty acid, ricinol Examples include acid and 12-hydroxystearic acid.

  Content in the oil-in-water emulsion composition of a component (E) is 0.1-5 mass%, Preferably it is 0.3-3 mass%, More preferably, it is 0.5-2 mass%. Within this range, the spreadability and the gloss of the appearance are improved, which is preferable.

  In addition to the above components, the oil-in-water emulsion composition of the present invention includes other surfactants, lower alcohols, water-soluble polymers, plants, and the like within a range that does not impair the effects of the present invention depending on the purpose. Extracts, vitamins, antioxidants, antibacterial and antiseptics, anti-inflammatory agents, insect repellents, physiologically active ingredients, salts, chelating agents, neutralizing agents, water, pH adjusters, fragrances and the like can be blended.

  The use of the oil-in-water emulsion composition of the present invention can be used without particular limitation for cosmetics, quasi drugs, pharmaceuticals, etc., but is suitably used as cosmetics, quasi drugs because of its good feeling of use. I can do it. Specifically, it is suitable for use as skin cosmetics such as shampoos, rinses, conditioners, and other hair cosmetics, facial cleansers, cleansing cosmetics, lotions, milky lotions, creams, serums, sunscreen cosmetics, packs, and massage cosmetics. it can. Among these, it is particularly preferable to apply as skin care cosmetics such as milky lotion, cream, and cosmetic liquid.

Next, embodiments of the present invention will be listed.
[1] An oil-in-water emulsion composition containing the following components (A) to (D):
(A) 25 mass% or more of ester oil and / or vegetable oil that is liquid at 40 ° C (B) polyoxyethylene sorbit beeswax (C) higher alcohol 3-12 mass% with respect to the total composition
(D) N-acylamino acid and / or salt thereof 0.15 to 1.8% by mass relative to the total amount of the composition.
[2] The oil-in-water emulsion composition according to [1], wherein the component (A) is one or more selected from ester oils and vegetable oils having an IOB value of 0.05 to 0.8.
[3] Component (A) is selected from ester oils of C8-22 aliphatic mono- or dicarboxylic acids and C3-18 alcohols or C3-5 polyhydric alcohols, and vegetable oils. The oil-in-water emulsion composition according to [1] or [2], which is one type or two or more types.
[4] Component (A) is di-2-ethylhexyl sebacate, diisopropyl sebacate, 2-ethylhexyl paramethoxycinnamate, myristyl myristate, cetyl palmitate, glyceryl tri (capryle-caprate), glyceryl triisostearate Glyceryl tripalmitate, glyceryl tri-2-heptylundecanoate, glyceryl tribehenate, glyceryl trimyristate, fatty acid glyceryl, glyceryl trilaurate, olive oil, macadamia nut oil, meadow foam oil, castor oil, safflower oil, sunflower oil, The oil-in-water emulsion composition according to any one of [1] to [3], which is one or more selected from avocado oil, canola oil, kyounin oil, rice germ oil, and rice bran oil.
[5] The content of component (A) is 5 to 30% by mass, preferably 5 to 20% by mass, more preferably 5 to 15% by mass, based on the total amount of the composition. The oil-in-water emulsion composition according to any one of the above.
[6] The oil-in-water type according to any one of [1] to [5], wherein the mass ratio of the nonpolar oil and the component (A) is 0 to 0.8, preferably 0.1 to 0.5. Emulsified composition.
[7] The oil-in-water emulsion composition according to any one of [1] to [6], wherein the content of the component (A) in the oil phase is 30 to 60% by mass, preferably 30 to 50% by mass. .
[8] The oil-in-water emulsion composition according to any one of [1] to [7], wherein the component (B) has a polyoxyethylene addition mole number of 4 to 25, preferably 6 to 20.
[9] The content of component (B) is 0.1 to 5% by mass, preferably 0.5 to 5% by mass, based on the total amount of the composition, according to any one of [1] to [8] Oil-in-water emulsion composition.
[10] Component (C) is a saturated or unsaturated linear or branched alcohol having 12 to 24 carbon atoms, preferably a saturated linear alcohol having 14 to 24 carbon atoms, more preferably 16 to 16 carbon atoms. 22. The oil-in-water emulsion composition according to any one of [1] to [9], which is 22 saturated linear alcohol.
[11] The oil-in-water emulsification according to any one of [1] to [10], wherein the content of the component (C) is 3 to 12% by mass, preferably 3 to 7% by mass, based on the total amount of the composition. Composition.
[12] The component (D) is an N-acyl amino acid having an acyl group derived from a saturated or unsaturated linear or branched fatty acid having 8 to 22 carbon atoms and / or a salt thereof [1] to [11] ] The oil-in-water emulsion composition in any one of.
[13] The component (D) is any one of [1] to [12], wherein the amino acid constituting the N-acylamino acid is glutamic acid, aspartic acid, glycine, alanine, methylalanine, sarcosine, lysine or arginine. An oil-in-water emulsion composition.
[14] Any of [1] to [13], wherein the content of component (D) is 0.15 to 1.8% by mass, preferably 0.2 to 1.2% by mass, based on the total amount of the composition An oil-in-water emulsion composition according to claim 1.
[15] The oil-in-water emulsion composition according to any one of [1] to [14], further comprising (E) a higher fatty acid.
[16] The oil-in-water according to [15], wherein (E) the higher fatty acid is a linear or branched, saturated or unsaturated fatty acid having 10 to 30, preferably 12 to 24, more preferably 16 to 22 carbon atoms. Type emulsified composition.
[17] The content of (E) higher fatty acid is 0.1 to 5% by mass, preferably 0.3 to 3% by mass, more preferably 0.5 to 2% by mass with respect to the total amount of the composition [ [15] The oil-in-water emulsion composition according to [16].

Examples 1-10 and Comparative Examples 1-7
According to the formulation shown in Table 1, an oil-in-water emulsion composition was prepared. Using these, the following (1) stability test over time (high temperature and low temperature) and (2) functionality test were carried out and evaluated. The results are shown in Table 1.

(1) Stability test with time The oil-in-water emulsion composition shown in Table 1 was put in a glass bottle, and each sample was stored in a thermostat at 45 ° C. and −10 ° C. for 3 months. Based on the state immediately after preparation, the change in appearance after 3 months was visually determined based on the following criteria.

(Evaluation criteria for stability over time (45 ° C, 3 months))
○: No problem △: Very slight separation is observed ×: Separation and oil separation are observed (Evaluation criteria for stability over time (−10 ° C., 3 months))
○: No problem △: Minor over-solidification or precipitation of solids is observed X: Over-solidification of solid formulation or precipitation of solids is observed

(2) Sensory test Each sample was used by 10 evaluation panelists. “Good spreadability”, “Good skin fit”, “Smooth / Nuruki”, “Moisture retention” Was evaluated based on the following evaluation criteria. Each evaluation result showed the average score of 10 evaluation panelists.
Moreover, stickiness / nuckle is to evaluate the stickiness or nulliness of the skin after a certain time has elapsed after the preparation is applied to the skin and the skin state has settled down.

(Evaluation criteria for good extensibility)
5: Easy to spread 4: Easy to spread 3: Cannot say 2: Difficult to spread 1: Difficult to spread

(Evaluation criteria for skin familiarity)
5: Good 4: Slightly good 3: Neither can be said 2: Slightly bad 1: Bad

(Evaluation standards for stickiness / nulltsuki)
5: I don't feel sticky / null luck 4: I feel a little sticky / null luck 3: I can't say either 2: I feel sticky / null luck 1: I feel sticky / null luck strongly

(Moisture retention sustainability evaluation criteria)
5: A feeling of moisturizing for about 5 hours or more 4: A feeling of moisturizing for about 4 hours 3: A feeling of moisturizing for about 3 hours 2: A feeling of moisturizing for about 2 hours 1: A feeling of moisturizing I did not feel or felt moisturizing for about 1 hour

  The oil-in-water emulsified composition of the present invention has excellent moisturizing susceptibility and good temporal stability and extremely good usability even when the component (A), which is a polar oil, is highly blended. It is. On the other hand, the oil-in-water emulsion composition of the comparative example was inferior in both the stability over time and the feel. In particular, when the component (C) was 3 to 12% by mass and the component (D) was outside the range of 0.15 to 1.8% by mass (Comparative Examples 3 to 6), neither the stability over time nor the feeling of use was sufficient.

Claims (3)

An oil-in-water emulsion composition comprising the following components (A) to (D):
(A) Ester oil and / or vegetable oil that is liquid at 40 ° C. 5% by mass or more based on the total composition (B) Polyoxyethylene sorbit beeswax (C) Higher alcohol 3-12% by mass based on the total composition
(D) N-acylamino acid and / or salt thereof 0.15 to 1.8% by mass relative to the total amount of the composition   2. The oil-in-water emulsion composition according to claim 1, wherein the mass ratio (nonpolar oil / (A)) of the nonpolar oil that is liquid at 40 ° C. to the component (A) is 0 to 0.8.   The oil-in-water emulsion composition of Claim 1 or 2 which contains a component (A) 30-30 mass% in an oil phase.