Patent Application
20160067152
The present invention generally relates to cosmetics and relates to cleaning agents that contain a special blend of two abrasive components.
The washing, cleaning, and care of the human body are an important basic need, and cosmetic manufacturers are always trying to satisfy the continuously changing and evolving consumer requirements by providing novel and/or improved products.
An essential part of daily hygiene is, for example, the thorough cleaning of the skin, ideally with the simultaneous improvement of the appearance of the skin.
The cleaning and care of healthy, smooth skin, which has no or only minor impurities, typically do not cause any problems.
The cleaning of impure or oily skin or combination skin is problematic, in contrast, because many active substances used to combat impure or oily skin have a very strong degreasing effect and can provoke even more rapid sebum production. The problem of the impure skin may be exacerbated even further thereby.
Likewise problematic is the cleaning and care of large-pored skin, which is regarded as unattractive and objectionable particularly on the face, on the neck and cleavage region, and on the upper back. Astringent active substances for refining skin pores are known from the prior art. These contract the skin on the surface and thus briefly create the impression of small-pored skin. At the same time, these agents nevertheless remove moisture from the skin, which is direly needed to maintain a taut skin with few wrinkles
Accordingly, there is the need for cosmetic agents that are suitable for cleaning large-pored, impure skin or combination skin.
So-called scrubs are a variant of cosmetic cleaning agents especially preferred by many consumers for use on impure skin.
Cosmetic scrub products known from the prior art often contain abrasively acting particles such as polyethylene powder, walnut shell powder, or apricot or almond kernel powder. These powders can lead to skin irritation during use, because they themselves do not change during the skin treatment and often remain at least partially on the skin. Because of said irritant effect, corresponding scrub formulations are usually not used daily in order to allow periods of time during which the skin can regenerate. Moreover, it is often necessary after use of such products to apply skin care creams to the treated skin in order to care for skin damaged by the treatment and to keep it moist.
Therefore, there continues to be the demand for improved scrub products that avoid the disadvantages of known products.
Foaming body scrubs are described in WO 2011/149689 which contain abrasive biodegradable lactic acid particles as the abrasive component. It is stated in the application that the scrubs while having the same effectiveness are more environmentally friendly than known body scrubs including synthetic polymer particles.
Although the body scrubs described in the application are suitable in principle for removing sebum and dead skin cells, they cannot cover all consumer requirements to a sufficient extent.
Accordingly, there continues to be the demand for scrubs that are gentle for the skin and are suitable in particular for cleaning large-pored skin and/or impure combination skin.
The object of the present invention is to provide mild cosmetic scrubs that remove excess oil, sebum, and dead skin cells, without drying out the skin too greatly and/or irritating it during and after the cleaning A further object of the invention was to provide cosmetic scrubs that remove, reduce, or refine skin impurities and/or large skin pores and improve the overall appearance of the skin.
It was found that the stated objects can be achieved by the combination of certain abrasive active substances in a cosmetic cleaning agent.
Furthermore, other desirable features and characteristics of the present invention will become apparent from the subsequent detailed description of the invention and the appended claims, taken in conjunction with the accompanying drawings and this background of the invention.
A cosmetic cleaning agent, including polylactic acid particles and at least one additional organic or inorganic, water-insoluble abrasive component that is different from a) and has absolute particle sizes in the range of 40 to 500 μm.
Cosmetic use of a cleaning agent that has a) polylactic acid particles and b) at least one additional organic or inorganic, water-insoluble abrasive component that is different from a) and has absolute particle sizes in the range of 40 to 500 μm, for cleaning the skin and/or for improving the complexion, particularly for pore refinement in the face, back, and cleavage region and/or for matting the skin.
The following detailed description of the invention is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description of the invention.
A first subject of the present application is a cosmetic cleaning agent containing
The cosmetic cleaning agents according to the invention preferably contain
The cleaning agents according to the invention contain polylactic acid particles as the first essential ingredient.
Polylactic acid, also called polylactide or PLA, is a name for biodegradable polymers (polyesters), which are obtainable primarily by the ionic polymerization of lactide, a ring-shaped joining of two lactic acid molecules.
A ring-opening polymerization occurs at temperatures between 140 and 180° C. and under the effect of catalytic tin compounds (e.g., tin oxide). Thus, plastics with a high molecular weight and strength are produced. Lactide itself can be produced by fermentation of molasses or by fermentation of glucose with the aid of various bacteria.
Moreover, high-molecular-weight and pure polylactides can be produced directly from lactic acid with the aid of so-called polycondensation. Nevertheless, the disposal of the solvent is problematic in industrial production.
Lactic acid (2-hydroxypropanoic acid) has an asymmetric C atom, so that polylactic acid as well has optically active centers in the L(+) and D(−) configuration. The ratio of L- to D-monomer units in this case determines the degree of crystallinity, the melting point, and the biodegradability of the polymers.
Polylactic acids suitable according to the invention are L-polylactic acid, D-polylactic acid, and L/D-polylactic acid, and mixtures thereof. L-polylactic acid is especially preferred because of its very good biodegradability. In a preferred embodiment of the present invention, the percentage by weight of the L-lactic acid monomer units in the polylactic acid is greater than 50% by weight, preferably greater than 80% by weight, and especially greater than 90% by weight.
The molar mass of the polylactic acid suitable according to the invention is preferably 1000 to 1,000,000, preferably 10,000 to 300,000, more preferably 50,000 to 250,000, and especially 100,000 to 180,000 daltons.
In another preferred embodiment of the present invention, polylactic acid is used in a form blended with fillers. The use of greater filler amounts is helpful in reducing the polymer into particles and increases the biodegradability and the inner specific surface via porosity and capillarity. In this case, water-soluble fillers are particularly preferred, for example, metal chlorides such as NaCl, KCl, etc., metal carbonates such as Na2CO3, NaHCO3, etc., and metal sulfates such as MgSO4.
Natural raw materials can also be used as fillers, for example, nut shells, wood or bamboo fibers, starch, xanthan gum, alginates, dextran, agar etc. These fillers are biodegradable and do not cause the good ecological properties of polylactic acid particles to worsen. The content of biodegradable fillers in the polylactic acid particles can be typically 10 to 70% by weight, whereby amounts of 20 to 60% by weight are preferred and those of 30 to 50% by weight are especially preferred.
Polylactic acid particles suitable according to the invention can be present both as spherical and as irregular particles, which have a specific circularity.
It is assumed that irregular shapes can intensify the abrasiveness of the polylactic acid particles; therefore, it can be advantageous for some embodiments of the present invention, if the polylactic acid particles preferably have a circularity between 0.1 and 0.6.
Polylactic acid particles with a lower circularity, in contrast, can be preferred, if a less abrasive, gentler abrading action of the cleaning agent according to the invention is to be achieved.
The shape of the polylactic acid particles employed according to the invention can be defined in various ways, whereby within the scope of this preferred embodiment of the present invention, the geometric proportions of a particle and, more pragmatically, of a particle population are determined.
More recent, highly precise methods allow the precise determination of particle shapes from a large number of particles, typically of more than 10,000 particles, preferably of more than 100,000 particles. These methods enable a precise selection of the average particle shape of a particle population. The determination of particle shapes is preferably carried out with an “Occhio Nano 500 Particle Characterisation Instrument” with the software “Callistro version 25” (Occhio s.a. Liege, Belgium). This instrument enables the preparation, dispersing, imaging, and analysis of a particle population, whereby preferably the instrument parameters are set as follows: White Requested=180, vacuum time=5000 ms, sedimentation time=5000 ms, automatic threshold, number of particles counted/analyses=8000 to 500,000, minimum number of replicates/sample=3, lens setting 1×/1.5×.
The polylactic acid particles, used according to the invention, preferably have sizes defined by their area-equivalent diameter (ISO 9276-6:2008(E) Section 7), also called “Equivalent Circle Diameter ECD” (ASTM F1877-05 Section 11.3.2). The mean ECD of a particle population is calculated as the mean ECD of each individual particle of a particle population of at least 10,000 particles, preferably of more than 50,000 particles, especially of more than 100,000 particles, after particles with an area-equivalent diameter (ECD) below 10 μm were excluded from the measurement.
In a preferred embodiment of the present invention, the polylactic acid particles have mean ECD values of 10 to 1000 μm, preferably of 50 to 500 μm, more preferably of 100 to 350 μm, and especially of 150 to 250 μm.
Independent of the mean particle size, cosmetic cleaning agents according to the invention are preferred in which the polylactic acid particles have absolute particle sizes of 1 to 1000 μm, more preferably of 1 to 850 μm, especially preferably of 1 to 750 μm, exceedingly preferably of 1 to 500 μm, and especially preferably of 1 to 300 μm.
Within the scope of the present invention, shape descriptors are used which are calculations of geometric descriptors or shape factors. Shape factors are ratios between two different geometric properties, which for their part are a measurement of the proportions of the image of a whole particle or the measurement of the proportions of an ideal geometric body, enveloping the particle.
These results are descriptors similar to size ratios (aspect ratios). In a preferred embodiment of the present invention, mesoshape descriptors are used for particle characterization. These mesoshape descriptors indicate the extent to which a particle deviates from an ideal geometric shape, particularly from a sphere.
In a first preferred embodiment of the present invention, the polylactic acid particles can deviate from the typical spherical shape or sphere-like shapes such as, for example, granular particles (see above).
In this case, the particles preferably have sharp corners and edges and preferably possess concave curvatures. Sharp corners of non-spherical particles in this regard are defined by a radius less than 20 μm, preferably less than 8 μm, and especially less than 5 μm, whereby the radius is defined as the radius of an imaginary circle that follows the contour of the corner.
Circularity is a quantitative, two-dimensional image analysis and can be determined according to ISO 9276-6:2008(E) Section 8.2. Circularity is a preferred mesoshape descriptor and can be determined, for example, with the above-described “Occhio Nano 500 Particle Characterisation Instrument” with the software “Callistro version 25” (Occhio s.a. Liege, Belgium) or with the “Malvern Morphologi G3.” Circularity is occasionally described in the literature as the difference between a particle and the perfect spherical shape. The values for circularity vary between 0 and 1, whereby 1 describes the perfect sphere or (in the two-dimensional image) the perfect circle:
C=[(4πA(/p2]1/2
where A is the projection area (the two-dimensional descriptor) and p the length of the perimeter of the particle.
Within said preferred embodiment, polylactic acid particles with a mean circularity C of 0.1 to 0.6, preferably of 0.15 to 0.4, and especially of 0.2 to 0.35 have proven especially suitable within the scope of the present invention. In this case, the mean values are obtained by quotient formation from volume-based measurements and number-based measurements.
Solidity is a quantitative, 2-dimensional image analysis and can be determined according to ISO 9276-6:2008(E) Section 8.2. Solidity is likewise a preferred mesoshape descriptor and can be determined, for example, with the above-described “Occhio Nano 500 Particle Characterisation Instrument” with the software “Callistro version 25” (Occhio s.a. Liege, Belgium) or with the “Malvern Morphologi G3.” Solidity is a mesoshape descriptor, which describes the concavity of a particle or a particle population. Solidity values vary between 0 to 1, whereby 1 describes a non-concave particle:
Solidity=A/Ac
where A is the (image) area of the particle and Ac is the area of the convex shell enveloping the particle.
Within the first preferred embodiment, polylactic acid particles having a mean solidity of 0.4 to 0.9, preferably of 0.5 to 0.8, and especially of 0.55 to 0.65 have proven to be especially suitable within the scope of the invention. In this case, the mean values are obtained by quotient formation from volume-based measurements and number-based measurements.
Especially preferred polylactic acid particles of the first preferred embodiment preferably have a mean circularity C of 0.1 to 0.6, preferably of 0.15 to 0.4, and especially of 0.2 to 0.35 and a mean solidity of 0.4 to 0.9, preferably of 0.5 to 0.8, and especially of 0.55 to 0.65.
“Mean” circularity and solidity are averages from the measurement of a large number of particles, typically of more than 10,000 particles, preferably of more than 50,000 particles, and especially of more than 100,000 particles, whereby particles with an area-equivalent diameter (ECD) of less than 10 μm were excluded from the measurement.
After its preparation, the polylactic acid polymer can be converted to the desired particle size and shape, for example, by a grinding process, depending on the shape required for the particular purpose.
An especially preferred method for preparing polylactic acid particles with the desired circularity and solidity consists of preparing a foam from polylactic acid and subsequent grinding.
It is assumed that a specific hardness can enhance the abrasive effect of the polylactic acid particles; therefore, it can be advantageous for some embodiments of the present invention, furthermore, if the polylactic acid particles have hardnesses of 3 to 50 kg/mm2, preferably of 4 to 25 kg/mm2, and especially of 5 to 15 kg/mm2 on the HV Vickers hardness scale.
The hardness of the particles in this case can be varied via the ratio of the D- to L-monomers and via the molar mass.
Polylactic acid particles, which can be used preferably in the cleaning agents of the invention, are commercially available (for example, from the company Micro Powders, Inc., under the trade names Ecosrub®). Especially preferred are the commercial products Ecosrub® 20PC, Ecosrub® 50PC, Ecosrub® 100PC, Ecoblue® 5025, and Ecogreen® 5025. Preferred in particular are Ecosrub® 20PC and Ecosrub® 50PC.
The cleaning agents according to the invention contain as the second essential ingredient at least one additional organic or inorganic, water-insoluble abrasive component that is different from a) and has absolute particle sizes in the range of 40 to 500 μm.
The use of abrasive components b) with smaller particle sizes leads to an overall poorer effect of the cosmetic cleaning agents of the invention, because abrasive components b) with an especially small particle size, particularly during use on large-pored skin, at times lead to the clogging of skin pores. Clogging of skin pores can result in inflammatory reactions, which is undesirable.
The use of abrasive components b) with larger particle sizes also results in a poorer effect of the cleaning agents of the invention, because the abrasive effect of the particles was too great and led to irritations and minor damage of the skin.
Especially preferred abrasive components b) therefore have particle sizes in the range of 40 to 400 μm, more preferably of 50 to 300 μm, especially preferably of 60 to 250 μm, and exceedingly preferably of 70 to 200 μm.
The insolubility in water of abrasive components b) is important within the scope of the present invention, when the cleaning agents of the invention have an aqueous or aqueous-alcoholic carrier in which the abrasive components should not dissolve during storage.
In a preferred embodiment, the cleaning agents of the invention have an aqueous or aqueous-alcoholic carrier; therefore, water-insoluble components are required as abrasive components b).
Especially suitable abrasive components b) can be selected from organic or inorganic substances.
Suitable organic substances are understood to be, for example, polymer particles, especially polyethylene and/or polyamide 11 particles, crystalline cellulose, hydrogenated jojoba oil (jojoba beads), as well as crushed and/or ground plant parts, such as crushed and/or ground peach, apricot, walnut, and/or almond kernels, and/or cherry pits, optionally defatted pulp of almonds, coconuts, jojoba fruit, macadamia nuts, and other nuts, almond bran, wheat bran, oat flour, sawdust (wood flour), and nutshell flour, especially walnut shell flour or corn cob meal.
Suitable inorganic substances are understood to be, for example, clay, sea sand, glass dust, pumice flour, chalk, shell lime powder, and/or marble powder.
Especially preferred cosmetic cleaning agents of the invention are characterized in that they contain an inorganic, water-insoluble abrasive component b), which can be selected preferably from clay, sea sand, glass dust, pumice flour, chalk, shell lime powder, and/or marble powder. Sea sand is exceedingly preferred.
In a second especially preferred embodiment, cosmetic cleaning agents of the invention therefore contain
Apart from the abrasive properties, the cleaning agents of the invention furthermore should be mild for the skin and possess a good cleaning and skin care effect.
Conventional cosmetic cleaning agents because of their excellent cleaning and foaming ability contain predominantly anionic surfactants, optionally in a mixture with low amounts of co-surfactants.
Many commercially available anionic surfactants soften the skin during the cleaning process and remove lipids from the outer skin layers. As a result, the skin can become dry, rough, and at times cracked, which is particularly undesirable in scrubs. On the other hand, anionic surfactants often cannot be completely replaced by milder, for example, nonionic surfactants, because the cleaning and foaming action of the agents are reduced thereby.
It was found that especially mild cleaning agents of the invention can be produced, if the abrasive components a) and b) are incorporated into a suitable carrier, which includes a maximum of 15% by weight of at least one mild anionic, amphoteric/zwitterionic, and/or zwitterionic surfactant.
In another preferred embodiment, the cosmetic cleaning agents of the invention therefore contain 0.5 to 15% by weight, more preferably 1 to 13% by weight, and especially preferably 2 to 12% by weight of at least one anionic, amphoteric/zwitterionic, and/or nonionic surfactant, preferably at least one amphoteric surfactant. The quantitative data in this case refer to the total weight of the cosmetic cleaning agent.
A suitable cosmetic carrier is preferably understood to be an aqueous or aqueous-alcoholic carrier.
The carrier preferably includes at least 50% by weight, more preferably at least 55% by weight, and especially preferably at least 60% by weight of water.
Furthermore, the cosmetic carrier can contain 0.01 to 40% by weight, preferably 0.05 to 35% by weight, and especially 0.1 to 30% by weight of at least one alcohol, which can be selected from ethanol, ethyl diglycol, 1-propanol, 2-propanol, isopropanol, benzyl alcohol, phenoxyethanol, or mixtures of said alcohols.
The water-soluble alcohols are preferred.
Suitable anionic surfactants can be used in the cleaning agents of the invention preferably in amounts of 0.1 to 14.5% by weight, more preferably of 0.25 to 14% by weight, especially preferably of 0.5 to 12.5% by weight, and especially of 0.75 to 10% by weight, whereby the quantitative data refer to the total weight of the cleaning agent.
The suitable anionic surfactants include:
in which R′ preferably stands for an aliphatic hydrocarbon group having 8 to 30 carbon atoms, R2 for hydrogen, a group (CH2CH2O)nR1, or X, n for numbers from 0 to 10, and X for hydrogen, an alkali metal or alkaline earth metal or NR3R4R5R6, where R3 to R6 independently of one another stand for a C1 to C4 hydrocarbon group.
Preferred anionic surfactants are ether carboxylic acids of the aforementioned formula, acyl sarcosides having 8 to 24 C atoms in the acyl group, sulfosuccinic acid mono- and/or dialkyl esters having 8 to 24 C atoms in the alkyl group and sulfosuccinic acid monoalkylpolyoxyethyl esters having 8 to 24 C atoms in the alkyl group and 1 to 6 oxyethyl groups, alpha-olefin sulfonates having 8 to 24 C atoms, and/or alkyl sulfate salts and/or alkyl polyglycol ether sulfate salts of the aforementioned formula.
Especially preferred anionic surfactants are straight-chain or branched alkyl ether sulfates, which contain an alkyl group having 8 to 18 and especially having 10 to 16 C atoms, and 1 to 6 and especially 2 to 4 ethylene oxide units.
Furthermore, especially preferred anionic surfactants are straight-chain or branched alkyl sulfonates, which contain an alkyl group having 8 to 18 and especially having 10 to 16 C atoms.
Preferred in particular are the sodium, magnesium, and/or triethanolamine salts of linear or branched lauryl, tridecyl, and/or myristyl sulfates, which have a degree of ethoxylation of 2 to 4.
Suitable amphoteric/zwitterionic surfactants can be used in the cleaning agents of the invention preferably in amounts of 0.1 to 14.5% by weight, more preferably of 0.25 to 14% by weight, especially preferably of 0.5 to 12.5% by weight, and especially of 0.75 to 10% by weight, whereby the quantitative data refer to the total weight of the cleaning agent.
Suitable amphoteric/zwitterionic surfactants can be selected from compounds of the following formulas (i) to (v), in which the group R in each case stands for a straight-chain or branched, saturated or mono- or polyunsaturated alkyl or alkenyl group having 8 to 24 carbon atoms,
Especially suitable amphoteric/zwitterionic surfactants are alkyl amidoalkyl betaines and/or alkyl ampho(di)acetates of the aforementioned formulas (i) to (v).
Especially suitable amphoteric/zwitterionic surfactants include the surfactants known under the INCI names Cocamidopropyl Betaine and Disodium Cocoampho(di)acetate.
Suitable nonionic surfactants can be used in the cleaning agents of the invention preferably in amounts of 0.1 to 10% by weight, more preferably of 0.25 to 7.5% by weight, especially preferably of 0.5 to 6% by weight, and especially of 1 to 5% by weight, whereby the quantitative data refer to the total weight of the cleaning agent.
For the case that a nonionic surfactant is present in the cosmetic cleaning agents, alkyl oligoglucosides, particularly alkyl oligoglucosides based on hydrogenated C12/14 coconut alcohol or lauryl alcohol with a DP of 1-3, as they can be obtained commercially, for example, under the INCI names “Coco-Glucoside” or “Lauryl Glucoside,” are preferred.
Depending on the delivery form in which the cleaning agents of the invention are offered, various aforementioned surfactants or surfactant combinations can be preferred.
For scrub compositions used during showering, for example, flowable, high-foaming compositions have proven especially suitable, which contain
Pasty compositions in particular are suitable as a scrub composition, which can be used specifically on facial skin, cleavage, the neck, or the back; these contain
To improve the skin care properties during and after use of the cleaning agents of the invention, it is advantageous, further, if the cleaning agents contain at least one active substance with a positive effect on skin moisture.
In another preferred embodiment, cosmetic cleaning agents of the invention therefore contain in addition 0.001 to 20% by weight, more preferably 0.005 to 17.5% by weight, especially preferably 0.01 to 15% by weight, and exceedingly preferably 0.02 to 12.5% by weight of at least one active substance which positively affects skin moisture and is selected from
“Freeze-dried yogurt powder” is understood to be a yogurt powder that can be obtained from natural yogurt (after complete fermentation) by freeze-drying.
An especially suitable yogurt powder, which can be used in the cleaning agents of the invention, preferably includes the following main components:
Freeze-dried yogurt powder can be used in the cosmetic compositions of the invention, based on their total weight, preferably in an amount of 0.001 to 10% by weight, more preferably of 0.005 to 5% by weight, and especially of 0.01 to 3% by weight.
A freeze-dried yogurt powder, known commercially under the name “Yogurtene®” is particularly suitable for use in the cleaning agents of the invention.
Suitable polyols are to be taken to mean preferably glycerol, 1,2-propylene glycol, 1,3-butylene glycol, hexanediol, sorbitol, water-soluble polysaccharides, polyethylene glycols, and/or hyaluronic acid. The polyols can be used both individually and as a mixture. Especially preferred are glycerol, 1,3-butylene glycol, hexanediol, and/or sorbitol, which may be present in the cleaning agents of the invention preferably in an amount of 0.1 to 20% by weight, more preferably of 0.5 to 15% by weight, and especially of 1 to 12.5% by weight.
Suitable vitamins are understood preferably as the following vitamins, provitamins, and vitamin precursors, and derivatives thereof:
Vitamin A: The group of substances designated as vitamin A include retinol (vitamin A1) and 3,4-didehydroretinol (vitamin A2). β-Carotene is the retinol provitamin. Suitable vitamin A components are, for example, vitamin A acid and esters thereof, vitamin A aldehyde, and vitamin A alcohol and esters thereof such as the palmitate and the acetate.
Vitamin B: The vitamin B group or the vitamin B complex includes, inter alia,
The cleaning agents according to the invention can preferably contain vitamins, provitamins, and vitamin precursors from the groups A, B, E, and H.
Preferred in particular are nicotinic acid amide, biotin, pantolactone, and/or panthenol.
Vitamins, vitamin derivatives, and/or vitamin precursors can be used in the cosmetic compositions of the invention (based on their total weight) preferably in an amount of 0.001 to 2% by weight, more preferably of 0.005 to 1% by weight, and especially of 0.01 to 0.5% by weight.
Suitable ethoxylated or non-ethoxylated mono-, di-, and/or tri-fatty acid esters of saturated and/or unsaturated linear and/or branched fatty acids with glycerol are typically used as an oil-replenishing agent for the skin and are accordingly suitable as a further active substance in the cleaning agents of the invention.
Especially preferred aforementioned glycerol esters can be selected from 2 to 30-fold, preferably from 3 to 20-fold, and especially from 5 to 10-fold ethoxylated mono-, di-, and/or tri-fatty acid esters of saturated and/or unsaturated linear and/or branched C8-C24 fatty acids, preferably of C10-C18 fatty acids and glycerol (for example, the components known under the INCI names: PEG-10 Olive Fatty Acid Glycerides, PEG-9 Coconut Fatty Acid Glycerides, Glycereth-5 Cocoate, PEG-7 Glyceryl Cocoate, PEG-6 Caprylic/Capric Glyceride). PEG-7 Glycerol Cocoate is very especially preferred.
The aforementioned (optionally ethoxylated) mono-, di-, and/or triesters of glycerol with at least one C8-C24 fatty acid can be used in the cleaning agents of the invention preferably in amounts of 0.01 to 5% by weight, more preferably of 0.025 to 4% by weight, especially preferably of 0.05 to 3% by weight, and especially of 0.1 to 2% by weight, whereby the quantitative data refer to the total weight of the cleaning agents.
The abrasive and cleaning effect of the cleaning agents of the invention can be increased further, when at least one sebum-regulating and/or at least one skin-vitalizing and/or at least one antibacterial active substance are added to them.
In another preferred embodiment, the cleaning agents of the invention therefore contain in addition 0.001 to 5% by weight, more preferably 0.005 to 4% by weight, especially preferably 0.01 to 3% by weight, and exceedingly preferably 0.02 to 2% by weight of at least one sebum-regulating and/or at least one skin-vitalizing and/or at least one antibacterial active substance.
Suitable sebum-regulating active substances are taken to mean azelaic acid, azelaic acid derivatives, particularly potassium azeloyl diglycinate, which can be obtained, for example, as the commercial product Azeloglicina from Sinerga, sebacic acid, 10-hydroxydecanoic acid, 1,10-decanediol, mixtures of sebacic acid, 10-hydroxydecanoic acid, and 1,10-decanediol, as they can be obtained, for example, as the commercial product Acnacidol PG from Vincience, glycyrrhizin, which is also called glycyrrhizic acid or glycyrrhetinic acid glycoside, and 2-beta-glucuronido-alpha-glucuronide which represents glycyrrhetinic acid, and the salts thereof, tannic acid and the salts thereof, gallotannins, naringin, mixtures of glycyrrhizin (salts), tannic acid (salts), and/or gallotannins and naringin, as they can be obtained, for example, as the commercial product BiSCos Glynarin PF (INCI: AQUA (WATER), ALCOHOL, PHENOXYETHANOL, AMMONIUM GLYGYRRHIZATE, TANNIC ACID, NARINGIN) from the company Biesterfeld, furthermore extracts from Spiraea ulmaria, as they are present, e.g., in the product Seboregul from the company Silab, furthermore water- and oil-soluble extracts from Hamamelis, burdock, and stinging nettle, cinnamon tree extract (e.g., Sepicontrol® A5 from the company Seppic), chrysanthemum extract (e.g., Laricyl® from Laboratoires Serobiologiques), yeast protein hydrolysates, as they can be obtained, e.g., in the commercial products of the Asebiol® series from Laboratoires Serobiologiques, particularly Asebiol® LS 2539 BT 2 (INCI: Aqua, Hydrolyzed Yeast Protein, Pyridoxine, Niacinamide, Glycerin, Panthenol, Allantoin, Biotin), and Asebiol® LS 2539 BT (Aqua, Hydrolyzed Yeast Protein, Pyridoxine, Niacinamide, Glycerin, Panthenol, Propylene Glycol, Allantoin, Disodium Azelate, Biotin) and PEG-8 Isolauryl Thioether, as is contained, e.g., in the commercial products “Antifettfaktor® COS-218/2-A” from Cosmetochem (INCI: Aqua, Cetyl-PCA, PEG-8 Isolauryl Thioether, PCA, Cetyl Alcohol). Cleaning agents especially preferred according to the invention are characterized in that they contain at least one sebum-regulating active substance in a total amount of 0.001 to 5% by weight, preferably 0.01 to 2% by weight, especially preferably 0.05 to 1.5% by weight, and exceedingly preferably 0.1 to 0.5% by weight, in each case based on the overall cleaning agents.
Suitable skin-vitalizing active substances are understood to be preferably plant extracts that can be produced from all parts of a plant. These extracts are typically produced by extraction of the entire plant. It can also be preferred in individual cases, however, to produce the extracts solely from the flowers and/or leaves of the plant. Preferred for use in the cleaning agents of the invention above all are the extracts from green tea, white tea, oak bark, stinging nettle, Hamamelis, hops, chamomile, burdock, horsetail, whitethorn, lime blossom, lychee, almond, aloe vera, spruce needles, horse chestnut, sandalwood, juniper, coconut, mango, apricot, lemon, wheat, kiwi, melon, orange, grapefruit, sage, rosemary, birch, mallow, cuckoo flower, wild thyme, yarrow, thyme, melissa, restharrow, coltsfoot, marshmallow, ginseng, ginger root, Echinacea purpurea, Olea europaea, Foeniculum vulgaris, and Apium graveolens. Water, alcohols, and mixtures thereof can be used as extracting agents to produce the cited plant extracts. Of the alcohols, low alcohols such as ethanol and isopropanol, but in particular polyhydric alcohols such as ethylene glycol and propylene glycol, are preferred, both as the sole extracting agent and in a mixture with water. Plant extracts based on water/propylene glycol in a 1:10 to 10:1 ratio have proven to be particularly suitable. The plant extracts can be used both in pure and diluted form. If they are used in diluted form, they conventionally contain about 2 to 80% by weight of active substance and as the solvent, the extracting agent or mixture of extracting agents used to obtain them. The plant extract(s) can be used in the cleaning agents of the invention preferably in amounts of 0.01 to 5% by weight, more preferably of 0.05 to 4% by weight, especially preferably of 0.1 to 3% by weight, and especially of 0.25 to 2% by weight, whereby the quantitative data refer to the total weight of the cleaning agent.
Suitable “antibacterial” active substances are to be taken to mean preferably antibacterial, antimycotic, and/or antiseptic active substances such as benzoic acid, salicylic acid, dehydroacetic acid, sorbic acid, cinnamic acid, and/or the physiologically acceptable salts and/or derivatives of said acids. The alkali salts of benzoic acid and/or salicylic acid are especially preferred. Sodium benzoate and/or sodium salicylate are especially preferred.
The antibacterial active substance(s) can be used in the cleaning agents of the invention preferably in amounts of 0.01 to 3% by weight, more preferably of 0.05 to 2% by weight, and especially preferably of 0.1 to 1% by weight.
In an especially preferred embodiment, the cleaning agents of the invention contain, based on their total weight,
The stabilization and dispersing of the cleaning agents of the invention succeed especially well, if the cleaning agents contain at least one polymeric thickener, preferably a thickener with an acrylic acid (derivative) base. These are preferably taken to mean crosslinked or non-crosslinked polyacrylates and/or crosslinked or non-crosslinked copolymers of (meth)acrylic acid with at least one (meth)acrylic acid ester.
Preferably, these are anionic polymers that optionally can be hydrophobically modified.
Examples of anionic monomers of which acrylate homo- and copolymers can consist are acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic anhydride, and 2-acrylamido-2-methylpropane sulfonic acid. In this regard, the acid groups can be present entirely or partially as the sodium, potassium, ammonium, or the mono- or triethanolammonium salt. Preferred monomers are 2-acrylamido-2-methylpropanesulfonic acid and (meth)acrylic acid.
Preferred anionic homopolymers are non-crosslinked and crosslinked polyacrylic acids. In this regard, allyl ethers of pentaerythritol, of sucrose, and of propylene can be preferred crosslinking agents. Such compounds are, for example, available commercially under the trade name Carbopol®. Likewise preferred is the homopolymer of 2-acrylamido-2-methylpropanesulfonic acid, which is available commercially, for example, under the name Rheothik® 11-80.
Preferred furthermore are non-crosslinked and crosslinked, hydrophobically modified polyacrylic acids, which can be obtained from various suppliers as, for instance, 30% emulsions in water, for example, under the trade names Carbopol® Aqua SF1, Carbopol® Aqua SF2, or Rheomer® 33.
Preferred anionic acrylate copolymers are taken to mean copolymers of at least one anionic monomer and at least one nonionogenic monomer. In regard to the anionic monomers, reference is made to the substances cited above. Preferred nonionogenic monomers are acrylamide, methacrylamide, acrylic acid esters, (meth)acrylic acid esters, itaconic acid mono- and diesters, vinylpyrrolidone, vinyl ethers, and vinyl esters.
Preferred anionic copolymers are, for example, copolymers of acrylic acid, methacrylic acid, and/or C1-C6 alkyl esters thereof, as they are sold under the INCI declaration Acrylates Copolymer. Preferred commercial products are, for example, Aculyn® 33 from the company Rohm & Haas and/or Rheocare® TTA from the company Cognis. Preferred further are copolymers of acrylic acid, methacrylic acid, or C1-C6 alkyl esters thereof and the esters of an ethylenically unsaturated acid and an alkoxylated fatty alcohol. Suitable ethylenically unsaturated acids are in particular acrylic acid, methacrylic acid, and itaconic acid; suitable alkoxylated fatty alcohols are in particular Steareth-20 or Ceteth-20. Copolymers of this type are sold by Rohm & Haas under the trade name Aculyn® 22 and by the company National Starch under the trade names Structure® 2001 and Structure® 3001.
Preferred further are (meth)acrylic acid/C10-C30 alkyl acrylate copolymers, as they are commercially available, for example, under the trade name “Carbopol ETD 2020” (INCI name: Acrylates/C10-30 Alkyl Acrylates Crosspolymer).
The polymeric thickener(s) can be used in the cleaning agents of the invention preferably in amounts of 0.01 to 15% by weight, more preferably of 0.05 to 10% by weight, and especially of 0.1 to 10% by weight, whereby the quantitative data refer to the total weight of the cosmetic cleaning agent.
In another especially preferred embodiment, the cleaning agents of the invention contain, based on their total weight,
To achieve a wide range of textures, it is advantageous, furthermore, if the cleaning agents of the invention, based on their total weight, contain preferably 0.01 to 5% by weight, more preferably 0.05 to 4% by weight, especially preferably 0.1 to 3% by weight, and especially 0.2 to 2% by weight of at least one opacifier and/or at least one pearlescent agent.
Suitable pearlescent agents and opacifiers are taken to mean, for example,
Especially suitable are the opacifiers and/or pearlescent agents known under the INCI names:
titanium dioxide, synthetic and/or natural mica pigments coated with metal oxide(s), glycol distearate, such as, for example, the commercial product Cutina® AGS from the company Cognis, glycol monostearate, such as, for example, the commercial product Cutina® EGMS from the company Cognis, PEG-3 distearate, such as, for example, the commercial product Genapol® TS from the company Clariant, PEG-2 distearate, such as, for example, the commercial product Kessco® DEGMS from the company AkzoNobel, propylene glycol stearate, such as, for example, the commercial product Tegin® P from the company Goldschmidt, and/or styrene/acrylate copolymers, such as, for example, the commercial products Joncryl® 67 from the company Johnson Polymers, Suprawal® WS from the company BASF, and/or Acusol® OP 301 from the company Rohm & Haas.
To increase the mildness and care properties of the cleaning agents of the invention, it is advantageous, furthermore, if these contain, based on their total weight, preferably 0.01 to 5% by weight, more preferably 0.05 to 4% by weight, especially preferably 0.075 to 3% by weight, and especially 0.1 to 2% by weight of at least one cationic polymer.
Suitable cationic polymers are, for example:
Preferred cationic polymers are quaternized cellulose polymers, cationic guar derivatives, and/or cationic polymers with an acrylic acid (derivative) base, which are selected especially preferably from the polymers known under the INCI names: Guar Hydroxypropyltrimonium Chloride, Polyquatemium-6, Polyquatemium-7, Polyquatemium-10, Polyquatemium-37, and/or Polyquatemium-67.
A cationic polymer known under the INCI name Polyquatemium-7 is especially preferred for use in the cleaning agents of the invention.
Cosmetic cleaning agents preferred according to the invention can have viscosities in the range of 3000 to 400,000 mPas, depending on whether these involve a flowable shower scrub or a pasty scrub, for example, for cleaning facial skin.
In a preferred embodiment, the cleaning agent of the invention is a shower scrub, which has a viscosity especially preferably in the range of 4000 to 30,000 mPas and especially of 5000 to 20,000 mPas (in each case measured using a Haake rotational viscometer VT550, 20° C., measuring device MV, spindle MV II, 8 rpm).
In another preferred embodiment, the cleaning agent of the invention is a pasty composition, which has a viscosity especially preferably in the range of 100,000 to 400,000 mPas and especially of 200,000 to 400,000 mPas (in each case measured with a Brookfield rotational viscometer RVTDV II, 20° C., rotation speed 4 min−1, spindle No.: TC, Helipath).
The compositions of the invention are especially effective in a pH range, gentle on the skin, of about 4 to 5.8.
Cosmetic cleaning agents preferred according to the invention therefore have a pH in the range of 4.2 to 5.8, more preferably of 4.5 to 5.5, and especially preferably of 4.8 to 5.4.
Other active substances, auxiliary substances, and additives, which can be used in the cleaning agents of the invention, are, for example:
The cleaning agents of the invention have excellent properties in regard to use on the skin.
Apart from the especially gentle cleansing, they care for the skin and free it of excess sebum and dead skin cells. Skin impurities are eliminated or soothed with regular use of the agents and coarse skin pores are refined. The skin has an overall refined, fresher, smoother, and cleaner appearance.
A second subject of the invention therefore is the cosmetic use of a cleaning agent that includes
The following examples of the cleaning agents of the invention were prepared (the quantitative data refer to % by weight, unless otherwise stated):
The following commercial products were used in the shower scrubs:
Ginseng extract
The following commercial products were used in the shower scrubs:
While at least one exemplary embodiment has been presented in the foregoing detailed description of the invention, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment of the invention, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims and their legal equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2013 209 894.4 | May 2013 | DE | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/DE2014/200206 | May 2014 | US |
| Child | 14945019 | US |
