KR20070022085A - Personal care compositions comprising sparingly soluble solid oily components and solvents thereof - Google Patents

Abstract

(A) about 0.01% to about 10% of poorly soluble solid oily ingredients, (b) about 0.05% to about 50% of solvents for poorly soluble solid oily ingredients, (c) about 0.01% to about 10% A personal care composition containing an emulsifier, and (d) water, which is an emulsion, is disclosed. In the compositions of the present invention crystals and precipitates of poorly soluble solid oily components are reduced or eliminated.

Personal care compositions, poorly soluble, solvents, emulsifiers, water, emulsions, UV blockers

Description

PERSONAL CARE COMPOSITIONS COMPRISING SPARINGLY SOLUBLE SOLID OILY COMPONENTS AND SOLVENTS THEREOF}

The present invention relates to a personal care composition containing a poorly soluble solid oily ingredient and a solvent thereof. In the compositions of the present invention crystals and precipitates of poorly soluble solid oily components are reduced or eliminated.

Many personal care products currently available to consumers are primarily directed to improving and / or maintaining the health and / or physical appearance of the skin.

Various ingredients are used in personal care products to improve and / or maintain the health and / or physical appearance of the skin. For example, UV blockers are known to be beneficial in preventing excessive scaling and skin texture changes in the stratum corneum by exposure to ultraviolet light. Some UV blockers are also known to be solid oily ingredients that are poorly soluble in water and oil. Often such poorly soluble solid oily ingredients are incorporated into the composition by dissolving them in the oily phase in order to prevent a discomfort, such as sand. In addition, when the poorly soluble solid oily component is a poorly soluble solid oily UV blocking agent, it is preferable to dissolve them in a solvent in order to obtain higher SPF.

Even when such poorly soluble solid oily ingredients are incorporated into the composition by dissolving them in the oily phase, it has been found that such ingredients form crystals or precipitates in the oily phase of the composition during storage, for example due to lower temperatures during storage. . It has been found that such poorly soluble solid oily components form larger crystals or precipitates, especially when the composition is in the form of a water-in-oil emulsion. Such crystals and precipitates are undesirable given the stability of the product and / or consumer acceptance, which may cause a change in the appearance of the product and / or when applied to the skin and / or hair. This can cause you to feel uncomfortable like sand. In addition, when the poorly soluble solid oily component is a poorly soluble solid oily UV blocker, such crystals and precipitates are undesirable in view of obtaining a higher SPF.

Based on the foregoing, there is a need for personal care compositions in which crystals and precipitates of poorly soluble solid oily ingredients are reduced or eliminated.

None of the existing techniques provide all the advantages and effects of the present invention.

Summary of the Invention

The present invention is based on weight

(a) about 0.01% to about 10% of poorly soluble solid oily ingredients,

(b) about 0.05% to about 50% of a solvent for poorly soluble solid oily ingredients,

(c) about 0.01% to about 10% emulsifier, and

(d) contains water,

A personal care composition that is an emulsion.

In the compositions of the present invention crystals and precipitates of poorly soluble solid oily components are reduced or eliminated. Thus, the compositions of the present invention provide the stability and / or consumer preference of the product. When the poorly soluble solid oily component is a poorly soluble solid oily UV blocker, the composition can provide a higher SPF.

These and other features, aspects, and advantages of the invention will be better understood upon reading the following detailed description and the appended claims.

While this specification concludes with the claims specifically indicating and specifically claiming this invention, it is believed that the present invention will be better understood from the following detailed description.

As used herein, the term "comprising" means that other steps and other components may be added that do not affect the final result. This term includes the terms "consisting of" and "consisting essentially of".

All percentages, parts and ratios are based on the total weight of the composition according to the invention unless otherwise specified. All weights associated with the listed ingredients are based on activity level and therefore do not include carriers or by-products that may be included in commercially available materials.

As used herein, "mixture" is meant to encompass simple combinations of materials and any compounds that can result from their combination.

While this specification concludes with the claims specifically indicating and specifically claiming this invention, it is believed that the present invention will be better understood from the following detailed description.

Composition

The composition of the present invention is an emulsion. Such emulsions can be oil-in-water emulsions and water-in-oil emulsions. In the present invention, the composition is preferably a water-in-oil emulsion.

The composition of the present invention contains a poorly soluble solid oil component, a solvent for the poorly soluble solid oil component, an emulsifier and water.

In the compositions of the present invention, the weight ratio of poorly soluble solid oil component to solvent is preferably about 1: 2 to about 1:10, more preferably about 1: 2 to about 1: 5, even more preferably about 1 : 3 to about 1: 4.

Preferably, the composition of the present invention is substantially free of nonpolar oily components. Such nonpolar oily components include silicone oils and hydrocarbons. In the present invention, "substantially free of nonpolar oily components" means that the composition contains 3% or less, preferably 1% of nonpolar oily components.

The compositions of the present invention are suitable for topical use on the human body, facial skin and hair, in particular for facial skin. Generally, the application will be on the order of about one time per day over a long period, but the application rate may be up to about three or more times per day.

Poorly soluble solid oil component and its solvent

The composition of the present invention comprises a poorly soluble solid oily component at a level of about 0.01% to about 10%, preferably about 0.1% to about 5.0%, more preferably about 0.5% to about 3.0% by weight of the composition. It contains. The composition of the present invention comprises a solvent for the poorly soluble solid oily component based on the weight of the composition from about 0.05% to about 50%, preferably from about 0.5% to about 30%, more preferably from about 2.0% to about 20% Contains at the level of.

 The poorly soluble solid oily components suitable for use in the present invention are sold at 25 ° C. and have low solubility in both oil and water. The poorly soluble solid oily ingredients useful in the present invention include, for example, poorly soluble solid oily UV blockers, ceramides, cholesterol, orzanol and mixtures thereof. Preferred among them are poorly soluble solid oil-based UV blockers.

Poorly soluble solid oil-based UV blocker and its solvent

UV blockers are generally intended to prevent excessive peeling and skin texture changes of the stratum corneum by exposure to ultraviolet light. The poorly soluble solid oily UV blocking agents useful in the present invention include, for example, butyl methoxy dibenzoylmethane (abobenzone), 2-hydroxy-4-methoxybenzophenone (oxybenzone) and octyltriazone. Of these, butyl methoxy dibenzoylmethane is very preferred.

Such poorly soluble solid oily UV blocking agents are preferably used together with further UV blocking agents. Such further UV blocking agents useful in the present invention are for example octyl methoxylcinnamate, octyl salicylate, octocrylene, homosalate, 2-phenylbenzimidazole-5-sulfonic acid, octyldimethyl-p- Aminobenzoic acid, and 2-ethylhexyl N, N-dimethyl-p-aminobenzoate. The exact amount will depend on the sunscreen chosen and the desired Sun Protection Factor (SPF). SPF is commonly used as a standard for sunscreen protection against sunburn. Federal Register, Vol. 43, No. 166, pp. 38206-38269, August 25, 1978. Among the above additional UV blockers, liquid oily UV blockers such as octyl methoxylcinnamate, octyl salicylate, octocrylene, homosalate and 2-ethylhexyl N, N-dimethyl-p-aminobenzo Eates can be used as solvents of poorly soluble solid oily ingredients.

The poorly soluble solid oily UV blocking agent is dissolved in the solvent prior to addition to the composition. By dissolving poorly soluble solid oily UV blockers in solvents such UV blockers can provide higher SPF.

Such solvents are generally hydrophobic. Preferred are isononyl isononanoate; N-long chain acyl neutral amino acid esters such as isopropyl lauroyl sarcosinate; Phenethyl benzoate; Butyloctyl salicylate; Diethyl hexyl 2,6-naphthalate; Tricapryline; And mixtures thereof. In addition to these solvents, some of the additional UV blockers that are liquid oily UV blockers may also be used as solvents of poorly soluble solid oily components. Among the various solvents, preferred are isononyl isononanoate, isopropyl lauroyl sarcosinate, phenethyl benzoate and mixtures thereof, and very preferred are isononyl isononanoate and isopropyl lauroyl sarcosy Mixtures of nates, or mixtures of isononyl isononanoate and phenethyl benzoate. In the mixture, the weight ratio of isononyl isononanoate to isopropyl lauroyl sarcosinate or phenethyl benzoate is in the range of about 5: 1 to about 1: 3, more preferably about 3: 1 to about 1 : 1, even more preferably 2: 1.

N-long chain acyl neutral amino acid esters have long chain acyl groups, natural amino acid moieties, and hydrocarbon groups of the alcohols making up the ester. The long chain acyl group of the N-long chain acyl neutral amino acid ester is a straight or branched chain saturated or unsaturated acyl group having 6 to 22 carbon atoms. Examples include capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, linoleic acid, linolenic acid, oleic acid, isostearic acid, 2-ethylhexanoic acid, coconut oil fatty acid, tallow fatty acid. And acyl groups derived from cured resin fatty acids, palm kernel oil fatty acids, and the like. Preferable examples of the acyl group include caproyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, behenoyl group, coconut oil fatty acid acyl group, cured resin fatty acid acyl group, and the like. In addition, examples of neutral amino acids constituting the neutral amino acid moiety include neutral amino acids such as glycine, alanine, valine, leucine, isoleucine, serine, threonine, proline, beta-alanine, aminobutyric acid, sarcosine, N-methyl- Beta-alanine and the like. Preferred are glycine, alanine, valine, leucine, isoleucine, beta-alanine, alpha-aminobutyric acid, gamma-aminobutyric acid, sarcosine and N-methyl-beta-alanine. More preferred are glycine, alanine, beta-alanine, alpha-aminobutyric acid, gamma-aminobutyric acid, sarcosine and N-methyl-beta-alanine. Even more preferred are sarcosine, alanine, glycine and N-methyl-beta-alanine. Especially preferred are N-alkyl neutral amino acids. Most preferred are sarcosine and N-methyl-beta-alanine. These amino acids may be optically active compounds or racemic compounds. The hydrocarbon group of the alcohol constituting the ester is a branched or straight chain alkyl or alkenyl group having 1 to 10 carbon atoms. Alkyl groups are preferred. Examples include ethanol, propanol, isopropanol, butanol, t-butanol, isobutanol, 3-methyl-1-butanol, 2-methyl-1-butanol, fusel oil, pentanol, hexanol, cyclohexanol And hydrocarbon groups derivable from octanol, 2-ethylhexanol and decanol. Methyl esters having 1 carbon atom are undesirable because it means that methanol is used as starting material. Furthermore, a branched or straight chain alkyl group having 2 to 8 carbon atoms is preferable from the viewpoint of feeling in use. In particular, branched or straight chain alkyl groups of 2 to 5 carbon atoms are preferred because they feel excellent in dry or clean and the effect of the present invention is more satisfactory. In addition, a branched alkyl group having 3 to 5 carbon atoms is preferable in terms of stability against hydrolysis in addition to the feeling in use. Examples thereof include isopropyl group, t-butyl group, isobutyl group and the like. Of these, isopropyl groups are most preferred.

Emulsifier

The composition of the present invention contains an emulsifier at a level of from about 0.01% to about 10%, preferably from about 0.01% to about 5%, more preferably from about 0.5% to about 5% by weight of the composition. .

Any emulsifier can be used in the present invention. Such emulsifiers useful in the present invention include, for example, silicone copolyol esters, silicone copolyols, hydrophobically modified silicone copolyols, crosslinked emulsified siloxane elastomers, polyglycerine esters, sucrose esters, and mixtures thereof. Among the various emulsifiers, preferred are hydrophobically modified silicone copolyols, crosslinked emulsified siloxane elastomers and mixtures thereof.

Silicone copolyol esters useful herein have, for example, those having from about 2 to about 10 dialkylsiloxane units, preferably from dimethylpolysiloxane units, having from about 2 to about 20 carbon atoms derived from fatty acids, And having from about 5 to about 10 oxyalkylene groups. For example, such silicone copolyol esters are available from, for example, dimethicone isostearate, such as dimethicone PEG-7 isostearate under the tradename Ultrasil DW18, And dimethicone olivates such as, for example, dimethicone PEG-7 olivate, available from Noveon under the tradename Ultrasil DW-O.

Silicone copolyols useful in the present invention include, for example, those having about 2 to about 10 dialkylsiloxane units, preferably those having dimethylpolysiloxane units, and those having about 2 to about 10 oxyalkylene groups. For example, such silicone copolyols include, for example, dimethicone copolyols such as PEG-10 dimethicone, commercially available from Shintsu Chem. And tradename KF-6017.

Hydrophobically Modified Silicone Copolyols

Hydrophobically modified silicone copolyols useful herein have, for example, those having from about 2 to about 10 dialkylsiloxane units, preferably dimethylpolysiloxane units, having hydrophobic substituents of about 2 to about 20 carbon atoms. It includes. For example, such hydrophobically modified silicone copolyols include, for example, cetyl PEG / PPG-10 / 1 dimethicone, commercially available from Goldschmidt and under the trade name Abil EM 90.

Crosslinked emulsified siloxane elastomer

Crosslinked emulsified siloxane elastomers are also useful as emulsifiers of the present invention. As used herein, the term "emulsification" means a crosslinked organopolysiloxane elastomer having at least one polyoxyalkylene unit. Crosslinked emulsified organopolysiloxane elastomers are described in particular in US Pat. No. 5,412,004, issued May 2, 1995; 5,837,793, issued November 17, 1998; And the crosslinked polymers described in US Pat. No. 5,811,487, issued Sep. 22, 1998, all of which are incorporated herein by reference in their entirety.

Particularly useful crosslinked emulsified siloxane elastomers are polyoxyalkylene modified crosslinked siloxane elastomers formed from divinyl compounds, in particular siloxane polymers comprising at least two free vinyl groups that react with Si—H bonds on the polysiloxane backbone. . Preferably, the crosslinked siloxane elastomer is dimethyl polysiloxane crosslinked by Si—H moieties on molecularly spherical MQ resins.

For example, highly preferred and commercially available crosslinked emulsified siloxane elastomers include, for example, PEG-15 lauryl dimethicone crosslinker supplied from Shin-Etsu Chemical and under the trade names KSG-320 and KSG-330. . Crosslinked emulsified siloxane elastomers are often supplied as a mixture with a solvent.

water

The composition of the present invention contains water. Preferably deionized water is used. Natural waters containing mineral cations may also be used, depending on the desired product properties.

In general, the compositions of the present invention contain from about 40% to about 99%, preferably from about 50% to about 90%, by weight of the composition.

The pH of the composition of the present invention is preferably about 4 to about 8, more preferably about 5 to about 7. Suitable sticky skin treatments are particularly efficient in such pH ranges. Buffers and other pH adjusters can be included to achieve the desired pH.

Water soluble wetting agent

The composition of the present invention may further contain from about 1% to about 20%, preferably from about 3% to about 10% of a water soluble wetting agent. Water-soluble wetting agents useful in the present invention include polyhydric alcohols such as glycerin, sorbitol, propylene glycol, butylene glycol, hexylene glycol, ethoxylated glucose, 1,2-hexane diol, 1,2-pentane diol, hexanetrie All, dipropylene glycol, erythritol, trehalose, diglycerin, xylitol, maltitol, maltose, glucose, fructose, sodium chondroitin sulfate, sodium hyaluronate, sodium adenosine phosphate, sodium lactate, pyrrolidone carbonate, glucosamine, cyclo Dextrins and mixtures thereof.

The water soluble wetting agents useful herein are water soluble nonionic alkoxylated polymers, for example polyethylene glycols and polypropylene glycols having a molecular weight of up to about 1000, for example CTFA names PEG-200, PEG-400, PEG-600, PEG- 1000 and the mixture.

Very useful and commercially available humectants in the present invention include butylene glycol under the tradename 1,3-butylene glycol and available from ASAHI DENKA Co. Ltd .; Glycerin, available from Croda Universal Ltd. under the trade name CRODEROL GA7000, under the trade name PRECEERIN series from Uniichema, or under the same trade name as the chemical name glycerin. Glycerin available from NOF; Propylene glycols available from Inolex under the tradename LEXOL PG-865 / 855 or available from BASF under the tradename 1,2-propylene glycol USP; Dipropylene glycol available from BASF under the tradename dipropylene glycol; Diglycerin available from Solvay GmbH under the tradename diglycerol; Polyethylene glycol, available from Union Carbide under the brand name CARBOWAX series, and glyceryl polymethacrylate, propylene, available from Guardian Lab. Under the brand name Lubrarajel Oil. Mixtures of glycols and PVM / MA copolymers are included.

Ester softener

Softening oils useful in the present invention are those having an ester and melting point of about 25 ° C. or less, which provide a softening effect to the skin. Very preferred are softening oils of lower viscosity, lower molecular weight, or branched structure. It has been surprisingly found that the use of such oils can alleviate the sticky and slippery feeling on the skin.

Softening oils useful in the present invention include esters, especially esters having branched alkyl groups and alkenyl groups. Such esters include, for example, cetyl 2-ethylhexanoate, tridecyl isononanoate, isostearyl isostearate, isocetyl isostearate, isopropyl isostearate, isodecyl isononanoate, cetyl octano 8, diisopropyl myristate, isocetyl myristate, isotridecyl myristate, isopropyl myristate, myristyl myristate, isostearyl palmitate, isocetyl palmitate, isodecyl palmitate, isopropyl palmitate, Isostearyl myristate, octyl palmitate, caprylic / capric acid triglycerides, glyceryl tri-2-ethylhexanoate, neopentyl glycol di (2-ethyl hexanoate), neopentyl glycol dicap Late, diisopropyl dimerate, Glycerol trioctanate, glycerol triisopalmitate, isopropyl myristate, octyldodecyl lactate, and mixtures thereof. Triglycerides such as caprylic / capric triglycerides, PEG-6 caprylic / capric triglycerides, and PEG-8 caprylic / capric triglycerides may also be useful. Also useful are crude mixtures of such triglycerides whose CTFA name is Meadowfoam seed oil. Commercially available oils include, for example, tridecyl isononanoate available under the name Crodamol TN, available from Croda, and Hexalan available from Nisshin Seiyu, and the trade name. This is Cropure MDF and includes meadowfoam seed oil available from Croda.

Adhesive Skin Treatment

The composition of the present invention may contain from about 0.5% to about 10%, preferably from about 1% to about 5% of the adhesive skin treatment. Skin treatment agents useful in the present invention assist in the restoration and replenishment of the natural moisture barrier function of the epidermis, thereby providing an effect on the skin such as skin texture improvement. It is generally known that such formulations provide a useful effect on the skin when used regularly, but also when applied alone, also tend to give a negative skin feel when used.

Adhesive skin treatment agents useful in the present invention include niacinamide, nicotinic acid and esters thereof, nicotinyl alcohol, panthenol, panthenyl ethyl ether, n-acetyl cysteine, n-acetyl-L-serine, phosphodiesterase inhibitors, Trimethyl glycine, urea, gelatin, soluble collagen, royal jelly, tocopheryl nicotinate, and analogs or derivatives with vitamin D3, and mixtures thereof. Niacinamide is particularly preferred in that it can reduce or alleviate the intensity of chronic spots when used in a pharmaceutically effective amount. Niacinamide is suitably incorporated into the composition by first dissolving in water. Pantenol is also particularly preferred in that it provides a skin texture improving effect when used in an amount of about 1% or more. Niacinamide and panthenol are commercially available, for example, from Roche.

Whitening agent

The composition of the present invention may further contain about 0.001% to about 10%, more preferably about 0.1% to about 5% of a whitening agent. Whitening agents useful in the present invention are those compatible with the compositions of the present invention in aqueous form. Water-soluble whitening agents are preferred. Whitening agents useful in the present invention refer to active ingredients that not only alter the appearance of the skin as well as further improve hyperpigmentation as compared to pre-treatment.

Whitening agents useful in the present invention include ascorbic acid compounds, azelaic acid, butyl hydroxy anisole, molar acids and derivatives thereof, glycyrrhizin acid, hydroquinone, kojic acid, arbutin, audi extracts, and mixtures thereof. The use of combinations of whitening agents is considered advantageous in that they may provide a whitening effect through different mechanisms. Preferably, ascorbic acid compounds useful in the present invention are ascorbic acid salts or derivatives thereof. Exemplary water soluble salt derivatives include L-ascorbic acid 2-glucoside, L-ascorbyl phosphate ester salts such as sodium L-ascorbyl phosphate, potassium L-ascorbyl phosphate, magnesium L-ascorbyl phosphate, Calcium L-ascorbyl phosphate, aluminum L-ascorbyl phosphate is included, but is not limited thereto. L-ascorbyl sulfate ester salts may also be used. Examples are sodium L-ascorbyl sulfate, potassium L-ascorbyl sulfate, magnesium L-ascorbyl sulfate, calcium L-ascorbyl sulfate and aluminum L-ascorbyl sulfate.

Additional ingredients

The composition of the present invention may be selected by an operator depending on the characteristics of the desired final product and further contains other additional ingredients suitable for making the composition more cosmetically or aesthetically acceptable or providing additional use effects to the composition. You may. Ingredients useful in the present invention are conveniently classified by a particular effect or assumed mode of action, but a given category does not limit their use. It is also understood that one component may provide multiple effects.

(i) antioxidants and radical scavengers

Antioxidants and radical scavengers are particularly useful for providing protection against UV rays that can cause skin texture changes or increased peeling of the stratum corneum and other environmental factors that can cause skin damage. Preferred antioxidants / radical scavengers include, for example, tocopherol sorbate, and other esters of tocopherol, more preferably tocopherol sorbate. For example, the use of tocopherol sorbate in topical emulsions and its application to the present invention is described in US Pat. No. 4,847,071 to Bissett et al. On July 11, 1989.

(ii) anti-inflammatory agents

Anti-inflammatory agents enhance skin appearance effects, for example, by contributing to satisfactory skin tone and / or color and uniformity. Preferably, the anti-inflammatory agents include steroidal anti-inflammatory agents and nonsteroidal anti-inflammatory agents. Preferred steroidal anti-inflammatory agents for use are hydrocortisone. So-called "natural" anti-inflammatory agents are also useful. For example, alpha bisabolol, aloe vera, Manzistar (extracted from Rubia plants, in particular Rubia Cordifolia), and gugal (plants in the commiphora, in particular Comiphora). Extracted from Commiphora Mukul), cola extract, chamomile, and sea whip extract.

(iii) antimicrobial agents

As used, "antimicrobial agent" means a compound capable of destroying microorganisms, preventing the growth of microorganisms, or preventing the pathogenic action of microorganisms. Antimicrobial agents are useful, for example, in the control of acne. Preferred antimicrobial agents useful in the present invention are benzoyl peroxide, erythromycin, tetracycline, clindamycin, azelaic acid, sulfur resorcinol, phenoxyethanol, and Irgasan ™ DP 300 (Ciba Geigy). Corp.), United States). A safe and effective amount of the antimicrobial agent is preferably an emulsion of the invention in an amount of about 0.001% to about 10%, more preferably about 0.01% to about 5%, even more preferably about 0.05% to about 2%. It may also be added to.

(iv) chelating agents

As used herein, a "chelating agent" refers to a compound that reacts to remove metal ions from a system by forming a complex that prevents metal ions from easily participating in or catalyzing the chemical reaction. Inclusion of chelating agents is particularly useful in providing protection against ultraviolet radiation that can contribute to excessive peeling or skin texture changes and other environmental factors that can cause skin damage. Exemplary chelating agents useful in the present invention are described in US Pat. No. 5,487,884 to Bisset et al. On Jan. 30, 1996; PCT applications 91/16035 and 91/16034 to Bush et al., Published October 31, 1995. Preferred chelating agents are furyldioxime and its derivatives.

(v) sebum absorbent

The composition of the present invention may contain from about 0.1% to about 10%, preferably from about 1% to about 5% sebum absorbent. Sebum absorbents useful in the present invention include actually absorbing sebum that is separated from the pores and are compatible with the aqueous composition of the present invention. Water soluble, water swellable, or highly emulsifiable components are not suitable in the present invention because these components no longer have sebum absorption when formulated in the composition.

Preferred sebum absorbents for the present invention include porous spherical cellulose powder, solid silicone elastomer powder, surface modified porous silica powder, porous nylon powder, porous acrylate copolymer, and mixtures thereof. The type and amount of sebum absorbent is selected according to the desired product properties.

Porous spherical cellulose powders which are very useful and commercially available in the present invention are under the trade name Celluflow series, for example Cellulflow C025, and include materials available from Chisso Corp. Solid silicone elastomers that are very useful and commercially available in the present invention are vinyl dimethicone / methicone silsesquis available from ShinEtsu Chemical Co., Ltd. under the trade name KSP series, Tokyo, Japan. Oxane crosspolymers. Other commercially available sebum absorbers include porous acrylate copolymers available from Dow Corning under the trade name Polytrap.

(vi) sebum inhibitory plant extract

The composition of the present invention may further contain about 0.001% to about 5%, more preferably about 0.05% to about 1% of sebum inhibiting plant extract. The plant extract useful in the present invention exhibits the effect of astringent form for reducing the size of the pores or the inhibitory effect of 5-α-reductase, and is compatible with the composition of the present invention in aqueous form, preferably the present invention. It does not change the transparent or translucent appearance of the composition. Water soluble plant extracts are preferred. Plant extracts useful in the present invention include clove (choji) extracts, coix (yokuinin) extracts, witch hazel (hamamerisu) extracts, and mixtures thereof. . Such plant extracts are available from Iwase.

(vii) other ingredients

The composition of the present invention, in addition to the above-mentioned ingredients, preservatives and antiseptic enhancers such as Germall 115, methyl, ethyl, propyl and butyl esters of hydroxybenzoic acid, benzyl alcohol, imidazolidinyl urea, EDTA and their Water soluble or water soluble preservatives, including salts, bronopol (2-bromo-2-nitropropane-1,3-diol) and phenoxypropanol; Antifoam; Binders; Bio additives; Bulking agents; coloring agent; Essential oils and their solubilizers; Other natural extracts; Compounds that promote collagen production; It may further contain yeast fermentation filtrate, and others.

The following examples illustrate and show various embodiments within the scope of the invention. As many variations are possible without departing from the spirit and scope of the invention, this embodiment is provided for illustrative purposes only and should not be construed as a limitation of the invention. Where applicable, components are identified by chemical or CTFA name or alternatively as defined below. All percentages and weights are based on activity levels and therefore do not include carriers or by-products that may be included in commercially available materials.

Composition

Manufacturing method

The skin care compositions of "Example 1" to "Example 5" illustrated above may be prepared by any conventional method well known in the art. For example, the composition of the present invention can be prepared by the following steps:

(a) Heat phase 03 to about 80 ° C. and mix until the poorly soluble solid oily UV blocker is completely dissolved. Phase 03 is then cooled to about 25 ° C.

(b) Phase 01 is added to the mixture of (a).

(c) Phase 03 and Phase 04 are added to the mixture of (b).

(d) Finally, phase 05 is added to the mixture of (c) with mixing.

The embodiment disclosed and described by the previous "Example 1" to "Example 5" is a water-in-oil emulsion and has many advantages. For example, the compositions of Examples 1-5 are particularly useful for providing the skin with a UV blocking effect. In addition, in the compositions of Examples 1 to 5, crystals and precipitates of poorly soluble solid oily components may be reduced or eliminated.

All documents cited in the Detailed Description of the Invention are, in relevant part, incorporated herein by reference, and no citation of any document should be construed as an admission as prior art relating to the invention. Insofar as any meaning or definition of a term described herein is in conflict with any meaning or definition of a term in the literature incorporated by reference, the meaning or definition given to the term described herein takes precedence.

While specific embodiments of the invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. Accordingly, all such changes and modifications that fall within the scope of the invention are intended to be included in the appended claims.

Claims (12)

By weight (a) about 0.01% to about 10% of poorly soluble solid oily ingredients, (b) about 0.05% to about 50% of a solvent for poorly soluble solid oily ingredients, (c) about 0.01% to about 10% emulsifier, and (d) contains water, Personal care composition that is an emulsion. The personal care composition of claim 1 wherein the poorly soluble solid oily component is a poorly soluble solid oily UV blocker. The personal care composition of claim 2 wherein the poorly soluble solid oily UV blocker is selected from the group consisting of butyl methoxy dibenzoylmethane, 2-hydroxy-4-methoxybenzophenone, octyltriazone and mixtures thereof. The personal care composition of claim 3 wherein the poorly soluble solid oily UV blocker is butyl methoxy dibenzoylmethane. The personal care composition of claim 1 wherein the solvent is selected from the group consisting of isononyl isononanoate, isopropyl lauryl sarcosinate, phenethyl benzoate and mixtures thereof. The personal care composition of claim 5 wherein the solvent is a mixture of isononyl isononanoate and isopropyl lauryl sarcosinate or a mixture of isononyl isononanoate and phenethyl benzoate. 7. The isononyl isononanoate and isopropyl lauryl at a level such that the weight ratio of isononyl isononanoate to isopropyl lauryl sarcosinate is from about 5: 1 to about 1: 3. A personal care composition containing sarcosinate. 8. The method according to claim 7, containing isononyl isononanoate and isopropyl lauryl sarcosinate at a level such that the weight ratio of isononyl isononanoate to isopropyl lauryl sarcosinate is 2: 1. Personal care composition. 7. The method according to claim 6, containing isononyl isononanoate and phenethyl benzoate at a level such that the weight ratio of isononyl isononanoate to phenethyl benzoate is from about 5: 1 to about 1: 3. Personal care composition. The personal care composition of claim 9 containing isononyl isononanoate and phenethyl benzoate at a level such that the weight ratio of isononyl isononanoate to phenethyl benzoate is 2: 1. The personal care composition of claim 1 containing poorly soluble solid oil component and solvent at a level such that the weight ratio of poorly soluble solid oil component to solvent is about 1: 2 to about 1:10. The personal care composition of claim 1 wherein the emulsifier is selected from the group consisting of hydrophobically modified silicone copolyols, crosslinked emulsified siloxane elastomers, and mixtures thereof.