KR20060009904A - Personal care compositions containing a silicone elastomer and a dispersed oil phase - Google Patents

Abstract

The present invention relates to a personal care composition containing a dispersed oil phase, a silicone elastomer and an aqueous phase. These compositions are rinsable and at the same time deposit oil and silicone elastomer onto all keratinous surfaces while providing improved skin feel. Additionally, the present invention relates to a method of using a rinse off personal care composition that contains an elastomer gel, a dispersion phase and an aqueous phase.

Description

PERSONAL CARE COMPOSITIONS CONTAINING A SILICONE ELASTOMER AND A DISPERSED OIL PHASE}

The present invention relates to the field of personal care compositions for improving the skin feel of the keratinous surface. More specifically, rinsable personal care compositions are provided that provide excellent skin moisturizing and conditioning.

Personal care compositions are well known and widely used. Such compositions have long been used to cleanse and moisturize skin, deliver active agents, hide flaws and reduce oiliness / burning associated with sebum.

Skin conditioning compositions are known which provide a moisturizing effect. Many of these compositions are aqueous systems containing emulsified conditioning oils or other similar materials stabilized with surfactants. Typically, the skin moisturizing composition is in the form of a lotion that is applied to the skin after bathing and throughout the day if reapplication is needed.

The skin is composed of collagen fiber proteins that form the backbone of the skin structure and several layers of cells that coat and protect the keratin. The outermost of these layers is called the stratum corneum and is known to consist of a 25 nm protein bundle surrounded by an 8 nm thick layer. Anionic surfactants and organic solvents typically penetrate the stratum corneum membrane and destroy the integrity of the membrane by denitrification (ie removal of lipids from the stratum corneum). This disruption of the topography of the skin makes the feel rough, and eventually the surfactant or solvent interacts with the keratin, creating irritation.

It is now recognized that maintaining a proper moisture gradient across the stratum corneum is important for the functionality of the stratum corneum. Most of this water, sometimes considered as a softener in the stratum corneum, comes from the body's interior. If the humidity is too low, such as in cold climates, insufficient moisture will remain in the outer layers of the stratum corneum to adequately soften the tissue, and the skin will begin to peel and itch. Insufficient moisture across the stratum corneum also slightly reduces skin permeability. On the other hand, when the outside of the skin is exposed to high concentrations of water for a long time, the stratum corneum ultimately absorbs 3-5 times the weight of its own bound moisture. This causes the skin to swell and wrinkles into the skin resulting in an approximately two to three fold increase in skin permeability to water and moisturizer molecules. Since the skin is hydrated during the shower or bath, this is recognized as the ideal time to deliver the moisturizer to the skin because the absorption of the moisturizer will be high.

It is also more desirable to deliver the skin conditioning effect through in-the-shower or in-the-bath lotion in the shower. Unfortunately, during the shower / bath the moisturizer is often easily rinsed away from the skin. This is especially true when surfactants are present.

Thus, by effectively depositing moisturizers and / or other skin protectants during showers and / or baths, the stratum corneum functions as its barrier and water retention function at optimal performance despite the harmful interactions the skin may face in washing, working and recreation. There is a need for a composition that helps maintain this. A desirable property of such skin care compositions is to provide a good skin feel.

Thus, rinsable personal care compositions containing a silicone elastomer and a disperse oil phase effectively co-deposit oils, elastomers and / or other skin benefit agents during such showers and / or baths and apply to all skin types. Come now to help the stratum corneum maintain its barrier and water retention function at optimal performance despite the harmful interactions the skin may face in washing, working, and recreation while providing a smoother skin feel throughout Dude revealed. Several publications also disclose the use of personal care compositions containing silicone elastomers. See, eg, US Pat. No. 6,183,766. This publication teaches the use of silicone elastomers in combination with lipids. However, the use of silicone elastomers teaches that the lipid-containing hand sanitizer product is degreased.

The present invention provides a personal care composition which may further contain a skin benefit agent. Such compositions provide improved skin appearance, aesthetics, and skin feel during and / or after application, and are particularly useful for providing improved deposition or effectiveness of skin conditioning agents to desired skin areas.

Summary of the Invention

The present invention relates to a personal care composition comprising a dispersed oil phase, a silicone elastomer and an aqueous phase.

We have found that silicone elastomers dispersed in structured oils enable co-deposition of oils and elastomers on the skin from rinsable compositions. The oil in the disperse phase prevents the silicone elastomer from flocculating in the aqueous environment. Surprisingly, the dispersed oil phase also acts as a carrier for these materials which generally do not have an advantageous deposition profile and allows for the significant deposition of these materials on the skin. Such compositions are rinsable and at the same time deposit oil and silicone elastomers on all keratin surfaces while providing an improved skin feel.

Unless otherwise specified, all percentages and ratios used herein are based on the weight of the total composition and all measurements are made at a temperature of 25 ° C.

The compositions of the present invention may contain, consist essentially of, or consist of the essential and optional raw materials and components described herein. As used herein, “consisting essentially of” means that the composition or ingredient may comprise additional ingredients but does not substantially alter the basic and novel properties of the claimed composition or method. do.

All documents cited herein are hereby incorporated by reference in their entirety.

As used herein, the term "topical application" means the application or application of a composition of the invention onto the skin surface.

As used herein, the term "dermatologically acceptable" means that the compositions or components thereof described above are suitable for contact with human skin without excessive toxicity, incompatibility, instability, allergic reactions, and the like.

As used herein, the term "gel-network" refers to an emulsification system consisting of fatty alcohols and hydrophilic surfactants.

As used herein, the term “safe and effective amount” is sufficient to significantly induce a positive effect, preferably a positive skin appearance or feeling effect, including independently the effects disclosed herein. Serious side effects mean an amount of a compound, component, or composition that is small enough to avoid, ie, sufficient to provide a ratio of reasonable effects to risks within the scope of sound medical judgment.

Active agents and other ingredients useful in the present invention may be classified or described according to their cosmetic and / or therapeutic effects or their desired mode of action. However, it should be appreciated that the active agents and other ingredients useful in the present invention may in some cases provide one or more cosmetic and / or therapeutic effects or operate through one or more modes of action. Therefore, classifications herein are made for convenience and are not intended to limit the ingredients to the applications specifically mentioned or listed applications.

The compositions of the present invention are useful for topical application and to provide an essentially instant (ie, rapid) skin feel after rinsing the composition onto the stratum corneum surface. Without wishing to be bound by theory, it is believed that this rapid improvement in skin feel is at least partly due to the therapeutic covering or masking of skin defects by deposition of oils and silicone elastomers.

More particularly, the compositions of the present invention are visible and / or tactile discontinuities in the skin, including, but not limited to, visible and / or tactile discontinuities in skin texture and / or skin color, more specifically Is useful for the control of skin conditions, including control of discontinuities associated with skin aging. Such discontinuities may be induced or caused by internal and / or external factors. Exogenous factors include ultraviolet radiation (eg due to sun exposure), environmental pollution, wind, heat, low humidity, strong surfactants and abrasives, and the like. Endogenous factors include natural aging and other biochemical changes from inside the skin.

Dispersed oil phase

The dispersed oil phase includes skin compatible oils. By definition, the dispersed phase will have minimal solubility in the external phase and will be present as discrete particles in the composition. The dispersed oil phase is preferably about 80 weight percent or less, more preferably about 70 weight percent or less, even more preferably about 60 weight percent or less, and even more preferably about 50 weight percent or less of the oil phase of the composition. It contains. The dispersed oil phase preferably contains at least about 1 weight percent of the composition, more preferably at least about 5 weight percent, even more preferably at least about 7 weight percent, even more preferably at least about 10 weight percent.

Shear rate is a measure of how shear thinning a material as described in the methods described herein. When n is 1, the materials are Newtonian materials, although they may be viscous, they generally do not have sufficient structure to capture the silicone elastomer gel and elastomer particles. Accordingly, the skin compatible oil is preferably shear thinned by either its composition or by the structuring agent that may be added. Preferably, the shear rate of the dispersed oil phase is less than about 0.9, more preferably less than about 0.75, even more preferably less than about 0.6, even more preferably less than about 0.45, even more preferably less than about 0.3. .

Skin compatible oils

Skin compatible oils herein are defined as oils that are liquid or semi-solid at the temperature at which the bath is conducted and are considered safe for use in cosmetics and are inert or actually beneficial to the skin. The most useful skin compatible oils in the present invention include ester oils, hydrocarbon oils and silicone oils.

As the name implies, ester oils have one or more ester groups in the molecule. One type of common ester oil useful in the present invention is fatty acid mono and polyesters such as cetyl octanoate, octyl isanoanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myri State, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glycerol monostearate, glycerol distearate, glycerol tristearate, alkyl lactate, alkyl citrate and alkyl tart Rate; Sucrose esters and polyesters, sorbitol esters, and the like.

Useful ester oils of the second type consist mainly of triglycerides and modified triglycerides. These include vegetable oils such as jojoba oil, soybean oil, canola oil, sunflower oil, safflower oil, rice bran oil, avocado oil, almond oil, olive oil, sesame oil, persic oil, castor oil, coconut oil and mink oil. Synthetic triglycerides may also be used if they are liquid at room temperature. Modified triglycerides include materials such as ethoxylated and maleated triglyceride derivatives if liquid. Proprietary ester blends, such as those sold by Fintex as Finsolv, are also suitable, as are ethylhexanoic acid glycerides.

The third type of ester oil is a liquid polyester formed from the reaction of dicarboxylic acids with diols. Examples of polyesters suitable for the present invention are polyesters sold under the trade name PURESYN ESTER® by Exxon Mobil.

Second skin compatible oils suitable for the present invention include liquid and semisolid hydrocarbons. These are linear and branched oils such as liquid paraffin, squalene, suclan, mineral oil, low viscosity synthetic hydrocarbons such as polyalphaolefins sold under the trade name PURESYN PAO by Exxon Mobil and trade name Panalan Polybutenes sold under (PANALANE) or INDOPOL. Highly branched light (low viscosity) hydrocarbon oils are also suitable.

Vaseline is the only hydrocarbon material and useful component of the present invention. Its semisolid properties can be controlled both by the formulator and during preparation, through blending with other oils. Since it consists only partly of a liquid fraction at room temperature, it is more appropriate to be considered as a "structuring agent" when present alone, or alternatively as a "structuring agent" when mixed with other skin compatible oils.

Useful third skin compatible oils are silicone based ones. These include linear and cyclic polydimethyl siloxanes, organic functional silicones (alkyl and alkyl aryls), and amino silicones.

The dispersed oil phase preferably has several structures-that is, it is partially fluid. This can be accomplished through the use of structuring agents as is generally done by one skilled in the art or by the use of naturally structured oils such as petrolatum. This structure serves to trap the silicone elastomer in the dispersed oil phase droplets. In a preferred embodiment of the present invention, at least a part of the silicone elastomer is captured on the dispersed oil after treatment as observed through an optical microscope.

Silicone elastomer

Silicone elastomers are deformable and flexible crosslinked organopolysiloxane materials, which are illustrated in US Pat. No. 5,654,362 useful in the present invention and incorporated herein by reference in its entirety. Silicone elastomers exist for the purposes of the present invention in two forms: silicone elastomer gels in which the silicone elastomer is combined with a compatible solvent to produce a homogeneous gel, and generally a dry elastomer that is supplied as a powder. Regardless of form (gelling or powder), when present in the claimed composition, the silicone elastomer is preferably about 40 weight percent or less, more preferably about 20 weight percent or less, even more preferably about 10 weight percent or less It is contained as. The silicone elastomer, when present, is preferably contained at least 0.5 weight percent.

Such elastomers may be used alone or in combination with volatile or nonvolatile solvents. Examples of suitable solvents include, but are not limited to, volatile and nonvolatile silicones, volatile and nonvolatile alcohols, volatile and nonvolatile esters, volatile and nonvolatile hydrocarbons, and mixtures thereof. Preferred elastomeric gels for use in the present invention are elastomeric / solvent blends in which the ratio of elastomer to solvent is about 1: 100 to about 1: 1, more preferably about 1:50 to about 1: 5. Preferably the viscosity of the silicone elastomer gel is 7500 Pa · s (7,500,000 centipoises) or less, more preferably 500 Pa · s (500, 000 centipoises) or less. Preferably the viscosity of the silicone elastomer blend is at least 1 Pa.s (1,000 centipoise), more preferably at least 10 Pa.s (10,000 centipoise). When present as a powder, the elastomer (prior to addition to the skin compatible oil) is essentially in a 'dry' state.

Elastomers are by definition crosslinked, and the extent of crosslinking can vary depending on the elastic properties of the polymer desired. The crosslinking material may be hydrophilic (eg ethylene oxide and propylene oxide), hydrophobic (dimethicone, vinyl dimethicone, alkyl, etc.), or a combination thereof.

Examples of suitable silicone elastomer gels include DC9040 (cyclomethicone and dimethicone crosspolymer blends), DC9010 and DC 9011 (Dow Corning); (SFE 839 cyclomethicone and dimethicone / vinyldimethicone crosspolymer blends, GE); (Gransil GCM (octamethylcyclotetrasiloxane and polysilicon-11 blends), both manufactured by Shin-Etsu and varying in crosslinker and solvent composition KSG-21, KSG-210, KSG -310, KSG-320, KSG-330 and KSG-340, KSG-41, KSG-42, KSG-43, USG-103, and mixtures thereof.

Non-limiting examples of silicone elastomer powders useful in the present invention are the KSP 100 and 200 series and KMP series from Shin-Etsu, and DC9506 from Dow Corning and Toray.

The silicone elastomer gel or powder, if present, is preferably contained in an amount of about 60 weight percent or less, more preferably about 40 weight percent or less, and more preferably about 20 weight percent or less. The silicone elastomer, if present, is preferably contained at least 0.5 weight percent, more preferably at least 1 weight percent, more preferably at least 2 weight percent.

In an embodiment of the invention, the silicone elastomer is treated with a skin compatible oil for capture of the elastomer by the skin compatible oil. Under these conditions, two possible consequences exist when the silicone elastomer is in the form of a silicone elastomer gel-the elastomer gel may be compatible with the skin compatible oil so that a new gel is formed, or the elastomer gel is compatible with the skin. It is not compatible with the oil so that the elastomer will exist as separate domains in the dispersed skin compatible oil phase. A similar situation can occur with the use of silicone elastomer powders, which may be compatible with skin compatible oils and may cause some gelation, or the powders may be incompatible with skin compatible oils and thus no gelation at all. have. Preferred in the present invention is the situation where the elastomer gel or elastomer powder is not compatible with the skin compatible oil and there are separate domains of the elastomer gel or elastomer powder in the dispersed oil phase. For elastomer gels, this uses the Vaughn Solubility Parameter (VSP) of the elastomeric solvent as well as skin compatible oils (Christopher Vaughn, Cosmetics and Toiletries, Vol 103, 1988, pp 47-69). Can be predicted. Preferably, the absolute difference between the solvent phase of the silicone elastomer gel and the skin compatible oil is at least 0.5 VSP units, more preferably at least 0.8 VSP units, even more preferably at least 1.2 VSP units. For example, for a KSG-210 (elastomer in dimethicone) blend in petrolatum, the difference is 1.41 (7.33 (petrolatum) -5.92 (dimethicone) = 1.41).

Preferred elastomer gels or powders for use in the present invention have a ratio of elastomer to skin compatible oil of from about 1: 100 to about 1: 1, more preferably from about 1:50 to about 1: 2, even more preferably Is an elastomeric / skin compatible oil mixture that is about 1:25 to about 1: 3.

Aqueous phase

The continuous aqueous phase of the present invention typically comprises up to about 90 weight percent, preferably up to 80%, even more preferably up to about 70 weight percent, even more preferably up to about 60 weight percent fluid. The continuous aqueous phase of the present invention typically comprises at least 10 weight percent, preferably at least 20 weight percent, even more preferably at least 30 weight percent, even more preferably at least 40 weight percent fluid. As used herein, the term "fluid" means water, monohydric and polyhydric alcohols (glycerine, propylene glycol, ethanol, isopropanol, sorbitol, and the like), or any material that is water miscible. A "continuous" phase is also described by the person skilled in the art as an "external" phase.

Optional ingredients

The composition of the present invention may contain one or more additional skin care ingredients. In a preferred embodiment, when contacting the composition with human keratinous tissue, the additional component must be suitable for application to the keratinous tissue, i.e. the additional component is excessive within the scope of sound medical judgment upon incorporation into the composition. It is suitable for contact with human keratinous tissues without toxicity, incompatibility, instability, allergic reactions, etc.

CTFA Cosmetic Ingredient Handbook, Second Edition (1992) describes a wide variety of non-limiting cosmetic and pharmaceutical ingredients that are commonly used in the personal care industry and suitable for use in the compositions of the present invention.

However, in any embodiment of the present invention, additional ingredients useful in the present invention may be classified by the effect they provide or the desired mode of action. However, it should be appreciated that additional ingredients useful in the present invention may in some cases provide one or more effects or operate through one or more modes of action. Therefore, classifications herein are for convenience only and are not intended to limit the active to the specific use (s) listed.

Structuring agent

The present invention may optionally contain an oil structuring agent. The structurant can provide the correct rheological properties on the dispersion phase. This may help provide effective deposition and retention on the skin, wherein the viscosity of the structured oil or oil phase is from 1 to about 20,000 Pa.s as measured at 1 Sec-1 as measured using the lipid rheology method described below. (100 to about 200,000 poise), preferably 2 to about 10,000 Pa.s (200 to about 100,000 poise), most preferably 2 to about 5,000 Pa.s (200 to about 50,000 poise) . The amount of structurant necessary to produce this viscosity depends on the oil and structurant, but in general the structurant is preferably less than 75% by weight, more preferably less than 50% by weight, even more preferably Less than 35% by weight.

The structurant can be either organic or inorganic structurant. Examples of organic thickeners suitable for the present invention are sold by solid fatty acid esters, natural or modified fats, fatty acids, fatty amines, fatty alcohols, natural and synthetic waxes, and petrolatum and by Shell under the name KRATON. Block copolymers. Inorganic structuring agents include hydrophobically modified silica or hydrophobically modified clays. Non-limiting examples of inorganic structuring agents include BENTONE 27V, Benton 38V or BENTONE GEL MIO V from Rheox; And CAB-O-SIL TS720 or CAB-O-SIL M5 from Cabot Corporation.

Structurants that meet the above requirements with selected skin compatible oils can form a three-dimensional network to increase the viscosity of the selected oils. It has been found that such structured oil phases, ie oil phases built up by three-dimensional networks, are extremely desirable for use as wet skin treatment compositions for bathing. Such structured oils can be deposited and retained very effectively on wet skin and retained after rinsing and drying to provide a long lasting skin effect after washing without causing too oily / slender wet and dry feeling. The highly desirable in-use and post-use properties of such structured oils are believed to be due to the rheological properties of their shear thinning and the weak structure of the network. Due to the high low shear viscosity, the oil structured into the three-dimensional network can be adhered to the skin well during application of the skin conditioner. After deposition on the skin, this network is easily created during rubbing due to the weak structure of the crystal network and its lower high shear viscosity.

Surfactants

A wide variety of surfactants may be useful in the present invention for emulsifying the dispersed phase as well as to provide properties and allow for application during use in non-lathering systems. In cleaning applications, the surfactant phase also acts to clean the skin and provides an acceptable amount of foam to the user. The composition preferably comprises up to about 50 weight percent of a surfactant, more preferably up to about 30 weight percent, even more preferably up to about 15 weight percent, even more preferably up to about 5 weight percent of a surfactant. It contains. The composition preferably contains at least about 5 weight percent of a surfactant, more preferably at least about 3 weight percent, even more preferably at least about 1 weight percent, even more preferably at least about 0.1 weight percent of a surfactant. . For cleaning applications, the personal care compositions produce a total foam volume of preferably at least 300 ml, more preferably more than 600 ml, as described in the foaming volume test. The personal care composition preferably produces a Flash Lather Volume of at least 100 ml, preferably more than 200 ml, more preferably more than 300 ml, as described in the foaming volume test. The personal care composition preferably produces a Flash Lather Volume of at least 100 ml, preferably more than 200 ml, more preferably more than 300 ml, as described in the foaming volume test.

Preferred surfactants include those selected from the group consisting of anionic surfactants, nonionic surfactants, amphoteric surfactants, antifoaming surfactants, emulsifiers and mixtures thereof. Non-limiting examples of surfactants useful in the compositions of the present invention are disclosed in US Pat. No. 6,280,757 to McAtee et al., Issued August 28, 2001.

A) Anionic Surfactants

Non-limiting examples of anionic surfactants useful in the compositions of the present invention include McCutcheon's, Detergents and Emulsifiers, North American edition (1986), published by allured Publishing Corporation; McCutcheon's, Functimerican Edition (1992); And US Patent No. 3,929,678 to Laughlin et al. On December 30, 1975.

A wide variety of anionic surfactants are useful in the present invention. Non-limiting examples of anionic surfactants include those selected from the group consisting of sarcosinate, sulfate, isethionate, taurate, phosphate, lactylate, glutamate, and mixtures thereof. Among the isethionates, alcoholic isethionates are preferred, and among sulfates, alkyl and alkyl ether sulfates are preferred.

Other anionic materials useful in the present invention generally include fatty acid soaps having about 8 to about 24 carbon atoms, preferably about 10 to about 20 carbon atoms (ie, alkali metal salts, such as sodium or potassium). Salts). Such fatty acids used to make soaps can be obtained from natural sources such as, for example, glycerides derived from plants or animals (eg palm oil, coconut oil, soybean oil, castor oil, tallow, lard, etc.). Fatty acids can also be prepared synthetically. Soaps and their preparation are described in detail in US Pat. No. 4,557,853.

Other anionic materials include phosphates such as monoalkyl, dialkyl and trialkyl phosphate salts. Non-limiting examples of preferred anionic foaming surfactants useful in the present invention include sodium lauryl sulfate, ammonium lauryl sulfate, ammonium laureth sulfate, sodium laureth sulfate, sodium tridecetes sulfate, ammonium cetyl sulfate, sodium cetyl sulfate, Ammonium cocoyl isethionate, sodium lauroyl isethionate, sodium lauroyl lactylate, triethanolamine lauroyl lactylate, sodium caproyl lactylate, sodium lauroyl sarcosinate, sodium myristoyl sarco Sinate, sodium cocoyl sarcosinate, sodium lauroyl methyl taurate, sodium cocoyl methyl taurate, sodium lauroyl glutamate, sodium myristoyl glutamate and sodium cocoyl glutamate and mixtures thereof It is included.

Particularly preferred for use in the present invention are ammonium lauryl sulfate, ammonium laureth sulfate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium myristoyl sarcosinate, sodium lauroyl lactylate and tri Ethanolamine lauroyl lactylate.

B) nonionic surfactants

Non-limiting examples of nonionic surfactants for use in the compositions of the present invention include McCutcheon's, Detergents and Emulsifiers, North American edition (1986), published by allured Publishing Corporation; And McCutcheon's, Functional Materials, North American Edition (1992).

Nonionic surfactants useful in the present invention include those selected from the group consisting of alkyl glucosides, alkyl polyglucosides, polyhydroxy fatty acid amides, alkoxylated fatty acid esters, sucrose esters, amine oxides and mixtures thereof.

Non-limiting examples of preferred nonionic surfactants for use in the present invention include C ₈ -C ₁₄ glucose amide, C ₈ -C ₁₄ alkyl polyglucosides, sucrose cocoate, sucrose laurate, laumine oxide, cocoamine oxide and One selected from the group consisting of mixtures thereof.

C) amphoteric surfactants

As used herein, the term "amphoteric surfactant" is also used with the intention to include zwitterionic surfactants that are well known to a skilled formulator as a subset of amphoteric surfactants.

A wide variety of amphoteric foaming surfactants can be used in the compositions of the present invention. Particularly useful are those described broadly as derivatives of aliphatic secondary and tertiary amines, preferably nitrogen is present in a cationic state and aliphatic radicals can be straight or branched and one of the radicals is an ionizable water solubilizing group, for example Carboxy, sulfonates, sulfates, phosphates or phosphonates.

Non-limiting examples of amphoteric surfactants useful in the compositions of the present invention include McCutcheon's, Detergents and Emulsifiers, North American edition (1986), published by allured Publishing Corporation; And McCutcheon's, Functional Materials, North American Edition (1992).

Non-limiting examples of zwitterionic surfactants include those selected from the group consisting of betaine, sultaine, hydroxylsultine, alkyliminoacetate, iminodialkanoate, aminoalkanoate and mixtures thereof.

Preferred surfactants for use in the present invention are the following anionic surfactants, wherein the anionic surfactants are ammonium lauroyl sarcosinate, sodium tridecetate sulfate, sodium lauroyl sarcosinate, ammonium laureth sulfate, sodium Laureth sulfate, ammonium lauryl sulfate, sodium lauryl sulfate, ammonium cocoyl isethionate, sodium cocoyl isethionate, sodium lauroyl isethionate, sodium cetyl sulfate, sodium lauroyl lactylate, triethanolamine Selected from the group consisting of lauroyl lactylate and mixtures thereof, the nonionic surfactants being lauamine oxide, cocoamine oxide, decyl polyglucose, lauryl polyglucose, sucrose cocoate, C _12-14 glucoseamide, sucrose Group consisting of laurate and mixtures thereof Wherein the amphoteric surfactant is selected from the group consisting of disodium lauroampoacetate, sodium lauroampoacetate, cetyl dimethyl betaine, cocoamidopropyl betaine, cocoamidopropyl hydroxy sultaine and mixtures thereof do.

D) no foaming surfactant

A wide variety of foam free surfactants are useful in the present invention. The compositions of the present invention may contain a sufficient amount of one or more non-foaming surfactants to emulsify the dispersed phase to produce suitable particle size and good application properties on wet skin.

Non-limiting examples of such non-foaming compositions include polyethylene glycol 20 sorbitan monolaurate (polysorbate 20), polyethylene glycol 5 soya sterol, steareth-20, ceteareth-20, PPG-2 methyl glucose ether die Stearate, ceteth-10, polysorbate 80, cetyl phosphate, potassium cetyl phosphate, diethanolamine cetyl phosphate, polysorbate 60, glyceryl stearate, PEG-100 stearate, polyoxyethylene 20 sorbitan triole Ate (polysorbate 85), sorbitan monolaurate, polyoxyethylene 4 lauryl ether sodium stearate, polyglyceryl-4 isostearate, hexyl laurate, steareth-20, ceteareth-20, PPG-2 methyl glucose ether distearate, ceteth-10, diethanolamine cetyl phosphate, glyceryl steare Nitrate, PEG-100 stearate, and mixtures thereof.

E) emulsifier system

There are also several commercial emulsifier mixtures useful in some embodiments. Examples include PROLIPID 141 (glyceryl stearate, behenyl alcohol, palmitic acid, stearic acid, lecithin, lauryl alcohol, myristyl alcohol and cetyl alcohol) and 151 (glyceryl) from ISP Stearate, cetearyl alcohol, stearic acid, 1-propanamium, 3-amino-N- (2- (hydroxyethyl) -NN-dimethyl, NC (16-18) acyl derivative, chloride); POLAWAX NF (emulsification wax NF) from Croda, INCROQUAT BEHENYL TMS (Behentrimonium sulfate and cetearyl alcohol); and Emulium from Gattefosse Delta (EMULLIUM DELTA) (cetyl alcohol, glyceryl stearate, peg-75 stearate, ceteth-20 and steareth-20).

Thickener / Aqueous Phase Stabilizer

In some embodiments, the compositions of the present invention may further contain one or more thickeners / aqueous phase stabilizers. It is difficult to provide the correct composition range because different stabilizers thicken at different efficiencies, but when present the composition is preferably up to about 10 weight percent, more preferably up to about 8 weight percent, even more preferably Contains up to about 7 weight percent. The thickener / aqueous phase stabilizer, when present, preferably contains at least about 0.01 weight percent of the present personal care composition, more preferably at least about 0.05 weight percent, even more preferably at least about 0.1 weight percent. A better way of describing stabilizers is to say that this should increase the viscosity in the product. This can be measured using a stabilizer viscosity test. Preferably, the stabilizer has a viscosity of at least 1 Pa.s (1000 cps), more preferably at least 1.5 Pa.s (1500 cps), even more preferably at least 2 Pa.s (2000 cps) in this test. Create

Non-limiting examples of thickeners useful in the present invention include carboxylic acid polymers, such as those commercially available under the trade name Carbopol® 900 from Carbomer (e.g. BF Goodrich). Thing, for example, Carbopol (registered trademark) 954). Other suitable carboxylic acid polymeric agents include copolymers of C _10-30 alkyl acrylates with one or more monomers of esters of acrylic acid, methacrylic acid, or short chains (ie, C _1-4 alcohols) thereof, The crosslinker here is allyl ether of sucrose or pentaerythritol. Such copolymers are known as acrylate / C _10-30 alkyl acrylate crosspolymers and are incorporated by B.F. It is available from Goodrich as Carbopol® 1342, Carbopol® 1382, Pemulen TR-1, and Pemulen TR-2.

Other non-limiting examples of thickeners include crosslinked polyacrylate polymers including cationic and nonionic polymers.

Another non-limiting example of a thickener is a polyacrylamide polymer, in particular nonionic polyacrylamide polymers including substituted branched or unbranched polymers. More preferred among these polyacrylamide polymers are the Sepipel brand name from Seppic Corporation (Fairfield, NJ), given the CTFA designations polyacrylamide and isoparaffin and laureth-7. Nonionic polymers available under 305. Other polyacrylamide polymers useful in the present invention include multi-block copolymers of acrylamide and substituted acrylamide with acrylic acid and substituted acrylic acid. Commercially available examples of such multi-block copolymers include Hypan SR150H, SS500V, SS500W, SSSA100H from Lipo Chemicals, Inc. (Patterson, NJ).

Other non-limiting thickeners useful in the present invention are polysaccharides. Non-limiting examples of polysaccharide gelling agents include those selected from cellulose, and cellulose derivatives. Preferred among the alkyl hydroxyalkyl cellulose ethers are ethers of cetyl alcohol and hydroxyethyl cellulose and are trade name NATROSEL® CS Plus (from Aqualon Corporation, Wilmington, Delaware). Plus) and a CTFA name Cetyl hydroxyethylcellulose. Other useful polysaccharides include scleroglucan, a straight chain (1-3) linked glucose comprising (1-6) linked glucose in every three units, commercially available examples of which are Michel Mercier Products Inc. Clearogel® CS11 from Mercier Products Inc. (Mountainside, NJ).

Other non-limiting thickeners useful in the present invention include gum. Non-limiting examples of rubbers useful in the present invention include hectorite, hydrated silica, xantham rubber, and mixtures thereof.

Another non-limiting thickener class useful in the present invention is modified starch. Acrylate modified starch, for example WATERLOCK® from Grain Processing Corporation, may be used. Hydroxypropyl starch phosphate under the trademark STRUCTURE XL from National Starch is another example of a useful modified starch, and another useful example is ARISTOFLEX HMB from Clariant. Ammonium acrylic dimethyl taurate / behennets-25 methacrylate crosslinked polymer) .

Cationic polymer

The present invention may also contain cationic organic deposition polymers. The concentration of this cationic deposition polymer is preferably from about 0.025% to about 3%, more preferably from about 0.05% to about 2%, even more preferably from about 0.1% to about 1, based on the weight of the personal care composition % Range.

Cationic deposition polymers suitable for use in the present invention include cationic nitrogen-containing moieties such as quaternary ammonium or cationic protonated amino moieties. Cationic protonated amines may be primary, secondary or tertiary amines (preferably secondary or tertiary), depending on the selected pH and the particular species of the personal cleansing composition. The average molecular weight of the cationic deposition polymer is between about 5,000 and about 10 million, preferably about 100,000 or more, more preferably about 200,000 or more, but preferably about 2 million or less, more preferably about 1.5 million or less. The polymer also has a positive charge density at the intended use pH of the personal cleansing composition from about 0.2 meq / gm to about 5 meq / gm, preferably at least about 0.4 meq / gm, more preferably at least about 0.6 meq / gm, The pH generally ranges from about pH 4 to about pH 9, preferably from about pH 5 to about pH 8.

Non-limiting examples of cationic deposition polymers for use in the present personal care compositions include polysaccharide polymers, such as cationic cellulose derivatives. Preferred cationic cellulose polymers are available from Amerchol Corp. (Edison, NJ) as polymers KG, JR and LR-based polymers, most preferably KG-30M- Salt of hydroxyethyl cellulose reacted with trimethylammonium substituted epoxide, referred to as Polyquaternium 10 in CTFA).

Other suitable cationic deposition polymers include cationic guar rubber derivatives such as guar hydroxypropyltrimonium chloride, an embodiment of which is the Jaguar family (preferably available from Rhodia Inc.). Preferably, guar C-17), and the N-Hance polymer family, commercially available from Aqualon.

Other suitable cationic deposition polymers include synthetic cationic polymers. Suitable cationic polymers for use in the cleaning compositions of the present invention are water soluble or dispersible, uncrosslinked cationic polymers which have a positive charge density of about 4 meq / gm to about 7 meq / gm, preferably About 4 meq / gm to about 6 meq / gm, more preferably about 4.2 meq / gm to about 5.5 meq / gm. In addition, the average molecular weight of the polymer selected should be about 1,000 to about 1 million, preferably about 10,000 to about 500,000, more preferably about 75,000 to about 250,000.

The concentration of cationic polymer in the personal care composition ranges from about 0.025% to about 5%, preferably from about 0.1% to about 3%, more preferably from about 0.2% to about 1% by weight of the composition.

Non-limiting examples of commercially available synthetic cationic polymers for use in the present cleaning compositions are polymethacrylamidopropyl trimonium chloride, available under the trade name POLYCARE 133 from Rhodia, Cranberry, NJ, USA. .

Shiny particles

Non-limiting examples of interference pigments useful in the present invention include those supplied under the trade names PRESTIGE®, FLONAC® by Persperse, Inc .; Trademarks TIMIRON (R), COLORONA (R), DICHRONA (R) and Girona (TM) by EMD Chemicals, Inc. Supplied under XIRONA); And supplied under the trademarks FLAMENCO®, TIMICA®, DUOCHROME® by Engelhard Co.

The second interference pigments are based on HELICONE® HC supplied by cholesteric liquid crystals such as Kobo Products. Helicon® HC consists of a transparent platelet-shaped polyacrylate with a helical superstructure. As part of this structure, cigar-shaped liquid crystal molecules are fixed into layers of parallel rows. Each layer has slightly different molecular orientation and the distance between two layers having the same molecular orientation is defined as “pitch”, which determines the color. Pigments of this type are hydrophobic. Thus, they can be used without surface treatment.

Other optional ingredients

Other non-limiting examples of optional ingredients include vitamins and derivatives thereof (eg, ascorbic acid, vitamin E, tocopheryl acetate, etc.); Sunscreen; Thickeners (eg, polyol alkoxy esters available as Crotix from Croda); Preservatives for maintaining the antimicrobial integrity of the cleaning composition; Acne medications (resorcinol, salicylic acid, etc.); Antioxidants; Skin soothing and healing agents such as aloe vera extract, allantoin and the like; Chelating agents and metal ion sequestrants; And formulations suitable for aesthetic purposes, such as perfumes, essential oils, skin sensates, pigments, pearlescent agents (e.g. mica and titanium dioxide), lakes, colorants and the like (e.g. clove oil, menthol, Camphor, eucalyptus oil, and eugenol), and an effect agent selected from the group consisting of antibacterial agents and mixtures thereof. Such materials may be used in a range sufficient to provide the necessary effect as will be apparent to those skilled in the art.

Adhesive materials such as crosslinked silicone resin-dimethicone blends, and acrylate based adhesives and other commonly used film forming materials such as ISP sold under the trade name GANEX. Modified PVP polymers may also be used in the present invention.

Analytical Method

Lipid Rheology Test

Lipid rheology is measured on a TA Instruments AR2000 stress controlled rheometer comprising a Peltier temperature controlled sample stage or equivalent. A parallel plate geometry with a 40 mm plate and a 1 mm gap is used. The bottom plate is heated to 85 ° C. and equilibrated by adding molten lipid and structuring agent (if present) to the bottom plate. The top plate is then lowered to a 1 mm gap while ensuring that the lipids completely fill the gap, spin the top plate and add additional lipids to facilitate wicking, and the sample is rapidly cooled to 25 ° C and Equilibrate at 25 ° C. for 5 minutes. The stress-ramp procedure common to this type of machine was then used to create a logarithmic stress gradient of 20 to 2000 Pa at a rate of 60 seconds / decade (two-minute slope test) with 20 measurement points / decade. To measure the viscosity. The starting and final stresses are sufficient to cause flow and to reach shear rates of 10 sec < -1 > Record the viscosity and fit the data to the power law model using Equation 1. Only points between 0.001 sec-1 and 40 sec-1 are used to fit the power law. The viscosity at 1.0 sec-1 is calculated from Equation 1. Careful monitoring of the sample during the test is required to stop this method if material is released under the plate.

Record the viscosity and fit the data to the law of power by Equation 1:

η = κγγ (dot) ^(n-1)

Where η is the viscosity, κ is the consistency, γ is the shear rate, and n is the shear index.

The viscosity at 1 sec-1 is then calculated using the calculated values of κ and n from the fitted data.

Foam volume

The foam volume of the liquid personal cleansing composition is measured using a graduated cylinder and a tumbling apparatus. A graduated 1,000 ml cylinder (e.g. Pyrex 2982) is selected that has a 10 ml increment and is 36.8 cm (14.5 inches) high at the point of the 1,000 ml mark from the inside of the base. Distilled water (100 g at 23 ° C.) is added to a graduated cylinder. The cylinder is fixed to a rotating device which holds the cylinder about a rotation axis traversing the center of the graduated cylinder. One gram of total personal cleansing composition (0.5 g cleaning phase and 0.5 g protective phase) is added into a graduated cylinder and the lid of the cylinder is covered. The cylinder is rotated at a speed of 10 revolutions in about 20 seconds and stopped in a vertical position to complete the first rotation sequence. The timer is set to allow 30 seconds to discharge the bubbles thus generated. Thirty seconds after the bubble is discharged, the volume of the first bubble is measured by the nearest 10 ml mark by recording the bubble height in milligrams from the base (including any water that has drained to the base on the top of which the bubble is floating). .

If the top surface of the foam is uneven, the lowest height seen in the middle across the graduated cylinder is the first foam volume (ml). If the foam is so coarse that one or only a few foam cells ("bubbles") reach across the entire cylinder, the height required for 10 or more foam cells to fill the space is also in milliseconds upwards from the base. It becomes the first bubble volume. Foam cells larger than 2.5 cm (1 inch) in any dimension are referred to as unfilled air instead of bubbles wherever they appear. Foam collected on top of the graduated cylinder, but not discharged, is also present on the top of the foam collected on the top using a ruler to measure the thickness of the layer if this foam on top is present in the form of its own continuous layer. Include ml in the measurement by adding ml to ml of the foam measured from the bottom up. The maximum foam height is 1,000 ml (even if the total foam height exceeds 1,000 ml on the graduated cylinder). One minute after the first rotation is completed, a second rotation procedure is started which is the same as the first rotation procedure in terms of speed and duration. The second foam volume is recorded in the same manner as the first foam volume after the same 30 second foam discharge time. Complete the third procedure and measure the third bubble volume in the same way, stopping equally between each bubble discharge and measurement run.

The foam results after each procedure are combined together and the total foam volume is determined in ml as the sum of the three measurements. The instant bubble volume is the result after only the first rotation procedure in ml, ie the first bubble volume. The compositions according to the invention function significantly better than similar compositions in the form of conventional emulsions in this test.

The following examples illustrate and illustrate the invention in more detail within the scope of the invention. As many variations are possible without departing from the spirit and scope of the invention, the examples are provided for illustrative purposes only and should not be construed as limitations of the invention. All illustrated amounts are concentrations by weight of the total cleaning treatment composition, unless otherwise specified.

The personal care compositions of Examples 1-9 can be prepared by conventional preparation and mixing techniques.

The aqueous phase composition is prepared by first dispersing hydroxypropyl phosphate in water. Emulsified wax is added and heated to 160 ° F. at 71 ° C. The mixing vessel is then placed in a water bath to cool down below 38 ° C. (100 ° F.). Add perfume.

The lipid phase is prepared by first premixing multiple lipids in the presence. Elastomers and lipids are then added to the premix at 71 ° C. (160 ° F.). The elastomeric phase and the lipid phase are then ground under high shear forces using a Silverson L4R high shear force mixer or equivalent until the dispersion is free of solids and no large aggregates of elastomer are present. The lipid / elastomeric phase, which is still fluid, with increasing agitation is then quickly added to the aqueous phase (<27 ° C. (80 ° F.)). Add preservative and stir until product is free of cores.

Example 10-12

The compositions described above can be prepared by conventional preparation and mixing techniques. The cleaning phase composition is prepared by first adding citric acid in water at a ratio of 1: 3 to form the citric acid premix. The following components are then added into the main mixing vessel in the following order. Water, Miracare SLB-354, sodium chloride, and preservatives. Start stirring the main mixing vessel. In a separate mixing vessel the polymer (N-Hance 3196) is dispersed in water in a ratio of 1:10 to form a polymer premix. The fully dispersed polymer premix is added into the main mixing vessel with continued stirring. PEG 90M (Polyox WSR 301) is dispersed in water and then added to the main mixing vessel. Subsequently, the remaining water, fragrance and excel are added to the batch. Continue stirring until a homogeneous solution is formed.

The lipid phase is prepared by adding petrolatum into the mixing vessel. The vessel is heated to 88 ° C. (190 ° F.). Next, mineral oil is added while stirring. The elastomer is ground into lipids at 71 ° C. (160 ° F.) and then cooled with gentle stirring of the vessel.

The density of the wash and lipid phases is adjusted to within 0.05 g / cm 3. Two phases are packaged in a single container using a conventional toothpaste-tube filling device. The sample stage spins the bottle during the filling process to produce a striped appearance. The stripe size is approximately 6 mm wide and 100 mm long.

Claims (10)

a) preferably 1 to 40 weight percent silicone elastomer gel of the composition; b) preferably at a level of up to about 80 weight percent of said composition, preferably a dispersed oil phase selected from the group consisting of petrolatum, mineral oil, silicone, triglycerides, esters and mixtures thereof; And c) contains an aqueous phase, preferably water, The dispersed oil phase is present in a greater weight percent than the silicone elastomer, and the silicone elastomer gel is preferably entrapped within the dispersed oil phase. The composition of claim 1, wherein the shear rate of the dispersed oil phase is less than 0.9, preferably less than 0.6. The composition of claim 1, wherein the dispersed oil phase comprises a skin compatible oil phase. The composition of claim 1 wherein the ratio of the silicone elastomer to the skin compatible oil phase is from about 1: 100 to about 1: 1. 5. The composition of claim 1, wherein the silicone elastomer gel has a solvent phase and the solvent phase has an absolute difference of at least 1.2 in units of this Vaughn Solubility Parameter. 6. The composition of claim 1, further comprising up to about 5% by weight of the surfactant of the composition, more preferably the surfactant further comprises one or more anionic surfactants. The composition of claim 1, further comprising a polymer. 8. A composition according to claim 1 wherein the surfactant is present in the gel-network. The method of claim 1, wherein vitamins, sunscreens, thickeners, preservatives, acne treatments, antioxidants, skin soothing and healing agents, chelating agents and metal ion sequestrants, perfumes, essential oils, skin sensates And at least one effector selected from the group consisting of pigments, pearlescents, rakes, colorants, antimicrobials and mixtures thereof. As a method of using a personal care composition, a) on the substrate    i. Silicone elastomer gels;    ii. Dispersed oil phase; And    iii. Contains an aqueous phase, Preferably the personal care composition wherein the silicone elastomer gel is entrapped in the dispersed oil phase and the dispersed oil phase is present in a greater weight percentage than the silicone elastomer Applying a; b) rinsing off said personal care composition.