JP2016079179A - Emulsion composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composition which is excellent in a feeling of use, such as excellent compatibility to the skin and flexibility of the skin, has no temporal changes, such as coloring and odor, and is excellent in emulsification stability.SOLUTION: The present inventors have conducted intensive studies and finally found out that the above problem is solved by compounding partially hydrogenated lecithin and antioxidant, and also found out that a still better emulsion composition is obtained by compounding chelate.SELECTED DRAWING: None

Description

  The present invention relates to a composition excellent in emulsification stability, excellent in terms of usability such as familiarity to the skin and softness of the skin, without change over time such as coloring and odor.

Lecithin has long been used as a natural emulsifier. However, lecithin oxidizes with time, and coloring and odor become strong, and there is a problem as a raw material for cosmetics. By adding hydrogen, it is modified so that coloring and odor do not become strong with time.
However, there is a problem in terms of usability and further improvement has been demanded.

  An object of the present invention is to obtain a composition excellent in emulsification stability without any change over time such as coloring and odor, which is excellent in terms of usability such as familiarity with the skin and suppleness of the skin.

As a result of intensive studies by the present inventors, it has been found that the problem can be solved by blending partially hydrogenated lecithin and an antioxidant.
Lecithin chemically means phosphatidylcholine, but industrially it is a general name for a mixture of various phospholipids. Generally, it is produced from soybeans and egg yolk.
In order to suppress changes over time such as coloring and odor, lecithin is hydrogenated. However, there are problems that the feeling of use such as the familiarity to the skin and the suppleness of the skin is lowered.
The inventors of the present invention have found that, by partially performing hydrogenation, changes over time such as coloring and odor can be suppressed while preventing the feeling of use from being lowered.
However, it is effective to add an antioxidant in order to further suppress the change with time, and the change with time is made more stable by adding a chelating agent.
First, hydrogenation of lecithin is performed so that the iodine value is 20 to 50, more preferably 35 to 45.
Such partial hydrogenation has a good balance between changes over time, such as coloring and odor, and the feeling of familiarity with the skin, softness of the skin, etc. It was found that can be suppressed.
The blending amount varies greatly depending on the amount and type of the oil phase, but is preferably 10 to 30% by weight of the oil phase.

One or more antioxidants may be selected from tocopherol, dibutylhydroxytoluene, butylhydroxyanisole, propyl gallate, etc., but tocopherol is preferred.
The blending amount varies greatly depending on the type and amount of lecithin and oil, but in the case of tocopherol, 0.01 to 10.0% by weight of the total amount of lecithin and the oil phase is preferable.
Examples of the chelating agent used in the present invention include ethylenediaminetetraacetic acid (EDTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), diethylenetriaminepentaacetic acid (DTPA) or alkali salts thereof, hydroxyethanedisulfonic acid (HEDP), maleic acid, Examples include tartaric acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, gluconic acid, sodium polyphosphate, and sodium metaphosphate. One or more types are selected and blended, but the blending amount is 0.0001 to 2.0% by weight, preferably 0.001 to 0.5% by weight.
Moreover, it is preferable not to add a surfactant other than lecithin from the standpoint of safety and the like, and increases the value of the composition of the present invention.
The fact that a surfactant other than lecithin is not blended means that the surfactant is not substantially blended, and the surfactant to the extent that it is contained as an impurity or as a carryover when the blended raw material is a natural product or a non-natural product. In some cases, it may be present from the gist of the present invention.
Further, the term “surfactant” as used herein refers to a carboxylic acid type such as aliphatic monocarboxylate, polyoxyethylene / alkyl ether / carboxylate, N-acyl sarcosine, N-acyl glutamate;・ Sulphonic acid types such as succinate, alkane sulfonate, alpha olefin sulfonate, linear alkylbenzene sulfonate, branched alkylbenzene sulfonate, etc .; alkyl sulfate, polyoxyethylene alkyl ether Sulfuric acid ester types such as sulfates and fatty acid sulfates; Phosphoric acid ester types such as alkyl phosphates, polyoxyethylene / alkyl ether / phosphates, polyoxyethylene / alkyl phenyl ethers / phosphates; monoalkylamines Alkyl such as salt, dialkylamine salt, trialkylamine salt Amine salt type; quaternary ammonium salt type such as trimethylammonium chloride (or bromide, iodide), dialkyldimethylammonium chloride, alkylbenzyldimethylammonium chloride; glycerin fatty acid ester, sorbitan fatty acid ester Ester types such as sucrose fatty acid ester; ether types such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene polyoxypropylene glycol; ester / ether types such as fatty acid polyethylene glycol and fatty acid polyoxyethylene sorbitan Alkanolamide type such as fatty acid alkanolamide; carboxybetaine type such as alkylbetaine and fatty acid amidepropylbetaine; 2-alkyl-N-carboxymethyl-N-hydroxy Imidazoline derivatives such as ethyl imidazolium betaine; glycine type such as alkyl (or dialkyl) diethylenetriaminoacetic acid; anion (anion) surfactant such as amine oxide type such as alkylamine oxide, cation (cation) surface activity Refers to typical substances such as surfactants, nonionic (nonionic) surfactants, amphoteric surfactants, etc., and some surfactants or extractable substances are included in these surfactants Absent.

In addition to this, an oily component, an aqueous component, a powder and the like are blended to prepare an emulsified composition.
The oil component is not particularly limited, but a raw material that meets the gist of the present invention is selected.
For example, avocado oil, almond oil, olive oil, orange oil, sesame oil, cocoa butter, chamomile oil, carrot oil, cucumber oil, beef tallow fatty acid, cucumber nut oil, safflower oil, soybean oil, camellia oil, corn oil, rapeseed oil , Cottonseed oil, peanut oil, turtle oil, mink oil, egg yolk oil, palm oil, palm kernel oil, molasses, coconut oil, beef tallow, lard, squalene, squalane, pristane or hydrogenated products of these oils (cured oil, etc.) Various fats and oils.
Waxes such as beeswax, carnauba wax, whale wax, lanolin, liquid lanolin, reduced lanolin, hard lanolin, candelilla wax, montan wax, shellac wax, rice wax;
Mineral oils such as liquid paraffin, petrolatum, paraffin, ozokelide, ceresin, and microcristan wax.
Fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, docosahexaenoic acid, eicosapentaenoic acid, 12-hydroxystearic acid, undecylenic acid, tall oil, and lanolin fatty acid.
Isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, oleyl oleate, decyl oleate, octyldodecyl myristate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, diethyl phthalate, phthalate Esters such as dibutyl acid, lanolin acetate, ethylene glycol monostearate, propylene glycol monostearate, propylene glycol dioleate.
Carotenoids or carotenoids, retinol, retinal, dehydroretinal, ergocalciferol, cholecalciferol, tocopherol, tocotrienol, tocopherol acetate, tocotrienol, tocopherol, (linoleic acid / oleic acid) tocopherol, tocopherol nicotinate or the like Derivative.
Fat-soluble derivatives of water-soluble vitamins such as pyridoxine dicaprylate, pyridoxine dipalmitate, ascorbyl palmitate, ascorbyl dipalmitate and ascorbyl tetrahexyldecanoate.
Ceramide, glucosylceramide, galactosylceramide, cerebroside, phosphatidylglucosylacylglycerol, N-oleoylsphingosine, N- (12-hydroxyoctadecanoyl) sphingosine, N- (16-hydroxyhexadecanoyl) sphingosine, N-salicyloyl Phytosphingosine, stearyl glycyrrhetinate, ubiquinone, γ-oryzanol, oil-soluble yocuinine extract, oil-soluble rosemary extract, oil-soluble licorice, orange essential oil, cinnamon essential oil, perilla essential oil, cedarwood essential oil, citronella essential oil, jasmine essential oil, gingergrass essential oil, spearmint Various oil-soluble raw materials such as essential oil, western peppermint essential oil, bergamot essential oil, eucalyptus essential oil, lime essential oil, lavender essential oil, lemongrass essential oil, lemon essential oil, rosemary essential oil.

Aqueous components include purified water, hot spring water, 1,3 butylene glycol, propylene glycol, dipropylene glycol, 1,2 pentanediol, 1,2 hexanediol, glycerin, diglycerin, pentaerythritol. , Polyhydric alcohols such as sorbitol and maltitol, monohydric alcohols such as ethanol, xanthan gum, quince seed gum, quince, fructan, pullulan, sodium hyaluronate, sodium chondroitin sulfate, hydroxyethyl cellulose, carboxymethyl cellulose, soluble starch, carboxymethyl Polysaccharides such as starch, sodium alginate, propylene glycol alginate and their derivatives, natural polymers such as proteins such as gelatin and casein, carboxyvinyl polymer Synthetic polymers, bentonites, smectites of vinyl and polyethylene glycols such as polyvinyl alcohol, sodium polyacrylate, methacryloyloxyethyl phosphorylcholine polymer and copolymers with copolymerizable monomers Inorganic polymers such as water-soluble vitamins, amino acids, water-soluble active ingredients such as aqueous extracts derived from plant or animal materials, and the like.
Moreover, the raw materials used for cosmetics, such as powders other than the above, can also be blended.

These are prepared by a conventional method for preparing an emulsified composition.
For emulsification, a high-pressure emulsifier is particularly effective in addition to stirring, a homogenizer, a homomixer, and the like.
A high-pressure emulsifier is a device that can give a high shearing force by applying a high pressure to the flow path.Furthermore, it can bend the flow path or unite multiple flow paths to give impact force to the liquid. You may have the structure to give. The type of the high-pressure emulsifier is not limited. For example, a Menton-Gorin type high-pressure homogenizer, a jet water flow inversion type high-pressure emulsifier, a microfluidizer (manufactured by Microfluidic), a nanomizer (manufactured by Nanomizer), an optimizer (Sugino) Machine), DeBee2000 (manufactured by BEE International), and the like. It is also effective to use a combination of two or more types of high-pressure emulsifiers or to process a plurality of times.

EXAMPLES Next, an Example is given and this invention is demonstrated in detail.
Table 1 shows the formulations of Examples 1 to 4 and Comparative Examples 1 to 5, and the table shows the formulations of Examples 5 and 6.

The notes are as follows.
Note) is manufactured by Wako Pure Chemical Industries, Ltd., trade name Hibiswako 105
In the emulsification method, the oil phase and the aqueous phase were each heated to 80 ° C., the oil phase was gradually added to the aqueous phase while stirring with a homosper, and then emulsified with a microfluidizer at 124 MPa and cooled.
The lecithin used in Examples and Comparative Examples was based on soybeans.

Usability test Five professional panelists actually used Examples 1 to 6 and Comparative Examples 1 to 5, and evaluated the familiarity to the skin and the suppleness of the skin.
The reference was Comparative Example 1.

+ 3 = much better than baseline.
+ 2 = better than reference.
+ 1 = slightly better than standard.
0 = same as standard.
-1 = slightly worse than standard
-2 = worse than standard.
-3 = much worse than standard

Stability test After 1 month at 50 ° C., coloration and odor were confirmed.
Table 3 shows the results of usability test and stability test.

  Looking at the results of the examples, compared to the comparative examples, it is excellent in terms of use feeling such as familiarity to the skin, softness of the skin, etc., no change over time such as coloring, smell, etc., and excellent in emulsion stability. A composition was obtained.

Claims (4)

  An emulsified composition comprising a partially hydrogenated lecithin having an iodine value of 20 to 50 and an antioxidant.   An emulsified composition comprising a partially hydrogenated lecithin having an iodine value of 35 to 45 and an antioxidant.   Furthermore, the emulsion composition which mix | blended the chelating agent.   The emulsified composition according to claims 1 to 3, wherein a surfactant other than lecithin is not blended.