Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0208—Tissues; Wipes; Patches
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/37—Esters of carboxylic acids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/39—Derivatives containing from 2 to 10 oxyalkylene groups
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
  • A61K8/922—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof of vegetable origin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
  • A61Q1/14—Preparations for removing make-up

Definitions

• the present invention relates to a skin-cleansing pad suitable for makeup removal which carries a cleansing lotion that can be activated and forms an emulsion upon the addition of water.
• Articles pre-impregnated with lotion or emulsion which can be used directly without the need to add additional cleansing or makeup-removing product at the time of its use, are commercially available.
• US 2011/0302734 Al describes a skin-cleansing article (pad) for makeup removal comprising a fibrous substrate and a cleansing composition that is activated by moistening with water followed by a mechanical action so as to obtain a cleansing foam, wherein the cleansing composition comprises at least one surfactant and a humectant, and the amount of water on the substrate is less than 25% by weight of the article.
• a skincleansing pad described in this document is the need to rinse the lotion remaining on the skin after use with water.
• skin-cleansing pads for makeup removal known in the art are not suited for the removal of waterproof makeups, but rather have been developed for makeup types which contain lower amounts of hydrophobic components, such as lipstick, eyeliner, foundation, conventional mascara or eye shadow.
• the present invention relates to a skin-cleansing article, which is disposable after use.
• the article comprises a pad made of a fibrous material forming a substrate, and a lotion with a substantially dry feel on the substrate.
• the invention relates to:
• a skin-cleansing article comprising a fibrous substrate, wherein the fibrous substrate is a pad comprising or consisting of cellulosic fibres, preferably cotton fibers, and having a basis weight of 100 g/m 2 to 350 g/m 2 ; wherein the fibrous substrate comprises a cleansing lotion comprising:
• a surfactant or surfactant mixture comprising at least one surfactant (al) having an HLB value of at least 6.5 and not more than 16, preferably 7 to 12, e.g. 7 to 10;
• the water content of the skin-cleansing article being less than 12 wt.-%, preferably less than 10 wt.-%, more preferably less than 8 wt.-%, based on the total weight of the article.
• the skin-cleansing article according to item 1 or 2 wherein the pad comprises natural cellulosic fibers, preferably cotton fibers, wherein these cellulosic fibers are preferably water-jet-entangled.
• the fibrous substrate comprises up to 30 wt.-% of synthetic fibers, preferably up to 20 wt.-% of synthetic fibers, more preferably up to 10 wt.-% of synthetic fibers, and even more preferably up to 5 w.-% of synthetic fibers, based on the total weight of the fibrous substrate; wherein the synthetic fibers are preferably selected from viscose fibers, polyester fibers, polypropylene fibers, and mixtures thereof.
• a tensile strength in the dry state of at least 10 N, preferably at least 15 N, in the machine direction (MD);
• surfactant (a) or the surfactants present in the surfactant mixture (a) are selected from polyglycerol-based emulsifiers, preferably from esters of a fatty acid and a polyglycerol having on average 2 to 6 glycerol units, in particular 2 to 4 glycerol units.
• the cleansing lotion comprises a surfactant mixture comprising (al) at least two surfactants which each have an HLB value of at least 6.5 and not more than 12, preferably 7 to 10, wherein the first surfactant has a HLB value of 7.0 to 9.0 and the second surfactant has an HLB value greater than 9.1, e.g. 9.5. to 11.0.
• the cleansing lotion comprises a surfactant mixture, the surfactant mixture comprising (a2) at least one surfactant which has an HLB value of 2 to 6, preferably 2 to 5, e.g. 2 to 4.
• polyglyceryl-4 oleate and/or (ii) esters of a fatty acid and a polyglycerol, the ester including on average 3 repeating units of glycerol and a fatty acid having a number of carbon atoms of 14 or less, preferably 8 to 12, e.g. polyglyceryl-3 caprate.
• the at least one surfactant (a2) is selected esters of a fatty acid and a polyglycerol, the ester including on average 3 repeating units of glycerol and a fatty acid having a number of carbon atoms of 16 or more, preferably 16 to 26, e.g. 16 to 22, which may be substituted with a hydroxy group, or a polymer of the hydroxy-substituted fatty acid, e.g. polyglyceryl-3 polyricinoleate.
• oil component (b) comprises at least one liquid oil selected from fatty esters, glycerides, natural plant oils and hydrocarbon-based oils.
• a surfactant mixture comprising at least one surfactant (al), e.g. one, two or three surfactants, having an HLB value of at least 6.5 and not more than 12, preferably 7 to 10 and (a2) at least one surfactant, e.g. one or two surfactants, which has an HLB value of 2 to 6, preferably 2 to 5, e.g. 2 to 4,
• the total amount (wt.) of surfactant(s) (a2) is preferably not more than 80% of the total amount (wt.) of surfactant(s) (al), preferably not more 50%, e.g. not more than 30%.
• surfactant mixture comprising at least one surfactant (al), e.g. one, two or three surfactants, having an HLB value of 7 to 10, and (a2) at least one surfactant, e.g. one or two surfactants, which has an HLB value of 2 to 5, e.g.
• an oil component comprising at least one liquid oil selected from fatty esters, glycerides, natural plant oils and hydrocarbon-based oils, preferably a fatty ester oil and/or a glyceride,
• Cleansing lotion comprising:
• a surfactant mixture comprising at least one surfactant (al), e.g. one, two or three surfactants, having an HLB value of at least 6.5 and not more than 12, preferably 7 to 10 and (a2) at least one surfactant, e.g. one or two surfactants, which has an HLB value of 2 to 6, preferably 2 to 5, e.g. 2 to 4,
• the total amount (wt.) of surfactant(s) (a2) is preferably not more than 80% of the total amount (wt.) of surfactant(s) (al), preferably not more 50%, e.g. not more than 30%.
• the cleansing lotion according to item 18, comprising:
• surfactant mixture comprising at least one surfactant (al), e.g. one, two or three surfactants, having an HLB value of 7 to 10, and (a2) at least one surfactant, e.g. one or two surfactants, which has an HLB value of 2 to 5, e.g. 2 to 4,
• an oil component comprising at least one liquid oil selected from fatty esters, glycerides, natural plant oils and hydrocarbon-based oils, preferably a fatty ester oil and/or a glyceride,
• Process for cleansing the skin and/or removing makeup on skin comprising the steps of:
• the present invention relates to a skin-cleansing article comprising a fibrous substrate, wherein the fibrous substrate is a pad having a basis weight of 100 g/m 2 to 350 g/m 2 and comprising or consisting of cellulosic fibres, preferably natural cellulosic fibers, such as cotton fibers; and wherein the fibrous substrate comprises a cleansing lotion comprising:
• a surfactant or surfactant mixture comprising at least one surfactant (al) having an HLB value of at least 6.5 and not more than 16, preferably 7 to 12, e.g. 7 to 10;
• the water content of the skin-cleansing article being less than 12 wt.-%, preferably less than 10 wt.-%, more preferably less than 8 wt.-%, based on the total weight of the article.
• the lotion and thus also the skin-cleansing article has a substantially dry appearance and feel. It is possible to determine the water content in the lotion composition by conducting a water determination according to Karl Fischer. If the total water content of the skincleansing article is to be determined the skin-cleansing article can be extracted with suitable organic solvents, such as water-free ethanol, followed by the water determination of the ethanol extract according to Karl Fischer. If any water remains in the fibrous substrate after the extraction this can be determined by conventional methods (e.g. by drying in an oven at 50°C until its weight no longer changes and determining the weight loss) and added to the water content determined by Karl Fischer.
• suitable organic solvents such as water-free ethanol
• the cleansing lotion is activated by moistening the pad with water.
• Self-emulsifying means in this context that neither the addition of further ingredients, e.g. further surfactants, nor a greater amount of mechanical action is required for the cleansing lotion to form an emulsion.
• the emulsion formed is preferably an O/W emulsion. Thereby the use of greater amounts of oil and an oily feel of the cleansing lotion can be avoided.
• the user adds an amount of water which leads for instance to a 4-fold to 20-fold, e.g. 6-fold to 12-fold dilution of the cleansing lotion.
• the skin-cleansing pad is normally fully impregnated with the diluted lotion.
• the spontaneous formation of an emulsion greatly contributes to the cleansing efficacy of the lotion, especially if makeup including greater amounts of hydrophobic components is to be removed.
• the ingredients of the lotion e.g. skin care oils, humectant, cosmetic actives, etc.
• it may also exert a skin care effect.
• foam may be formed when the pad is subjected to a mechanical action, such as wiping, bending or rubbing. This is however not essential for the cleansing action and not preferred in the context of the present invention. Accordingly, in one embodiment, the cleansing lotion is free of foam-forming ("lathering") surfactants.
• the form and size of the skin-cleansing pad is not particularly limited as long as they are suitable for the target application.
• the shape may be circular, oval, polygonal or some other shape, and the sizes may range from 25 to more than 100 cm 2 .
• the pads are circular and have a diameter ranging from 4 to 7 cm, for instance 5 to 6 cm.
• the pads have a rectangular shape and a size ranging from e.g. 40 to 60 cm 2 , e.g. 45 to 55 cm 2 .
• the basis weights are generally between 100 and 350 g/m 2 .
• One embodiment of the invention is directed towards pads obtained from a lap of fibrous material made only of cotton or cotton mixed with other optionally chopped fibres.
• the fibres of the lap are entangled so as to form a nonwoven arrangement of greater or lesser mechanical strength depending on the strength requirements of the article.
• a fibrous pad intended for cleansing the skin, and in particular for the removal of makeup is chosen for its beneficial properties. It is thick enough to be held comfortably in the hand when it is moistened. It absorbs and wipes away impurities. It conserves its form during use, on rubbing. It does not form fluff and does not leave fibres on the skin.
• the substrate of the skin-cleansing pad is a lap comprising or consisting of cellulosic fibres, e.g. cotton fibres, comprising three fiber (e.g. cotton) layers, two exterior layers and one central layer, characterised in that the exterior layers, between which the central layer is interposed, are card webs.
• the central layer comprises laminated cellulosic fibres (e.g. cotton fibres) oriented substantially obliquely between the two planes formed by the exterior layers.
• This lap is preferably obtained by a continuous process including the steps of superimposing the three layers and subjecting them to a scouring treatment, a bleaching treatment and then a rinsing treatment, to impart to the layers a very good mutual cohesion.
• This type of pad and its manufacture is described in EP 0 681 621.
• the mechanical properties of the pads can be improved by using either one or both of the following two techniques:
• hydroentangling processes preferably forms a relief at the surface of the pads which generally results from compression of the fibres either under the effect of embossing or calendering, or under the effect of a hydroentanglement process intended to join several laps of fibres together.
• the pad to be used in the present invention comprises two outer layers joined together wherein at least one outer layer has a surface with a texture defined thereupon.
• the shape and arrangement of this surface texture is not particularly limited.
• Examples of a suitable surface texture formed on at least one surface of the pad include continuous straight lines, in particular parallel lines, continuous curved lines, a square-mesh grid or a lozenge-shaped grid.
• the average distance (height) between the raised parts of the surface texture and the depressions between these raised parts may e.g. be between 0.1 and 1.0 mm, e.g. between 0.2 and 0.5 mm.
• the pad to be used in the present invention is a hydrophilic cotton pad used for skin-care and exhibiting a specific surface weight of at least 150 g/m 2 , comprising two different outer sides of which the fibers are hydro-entangled, characterized in that the first outer side comprises a texture formed by hollow depressions, e.g. striae, mutually apart by a spacing si which is between 1 and 8 mm and a depression (e.g. striae) depth d of at least 0.25 mm, e.g.
• the pad's tensile strength is at least 10 N, preferably at least 15N in the direction of motion (MD) and at least 4N, preferably at least 7N, in the direction transverse thereto (CD), as determined by the testing procedure described in the specification.
• the first outer side comprises hollow depressions (e.g. striae) at least 50% of the pad fibers are entangled.
• the spacing si between the depressions (e.g.) striae of the first side is between 1.2 and 5.5 mm and preferably between 2 and 4 mm.
• the pad has at least one surface having a raised pattern defined thereupon, said skin care pad comprising: (a) at least two outer layers of absorbent fibrous material joined together; and (b) at least one series of yarns placed between said outer layers, characterized in that the thickness of at least one of the outer layers is less than the average diameter of the yams.
• the central layer interposed between the two outer layers preferably includes cellulosic fibers such as cotton fibers.
• the raised pattern has protrusions of height H (as defined in US 2009/0068409 Al) between 0.2 and 2.0 mm, in particular between 0.3 and 0.5 mm.
• the shape and arrangement of the raised pattern is not particularly limited.
• raised patterns formed at the surface of the pad include continuous straight lines, in particular parallel lines, continuous curved lines, a square-mesh grid or a lozenge-shaped grid, of the type shown in Figures 2A to 2D of US 2009/0068409,
• bonding of the outer layers is carried out by means of a technique chosen from hydroentanglement, glueing and hot-melt bonding (thermobonding), the choice of the technique depending on the fiber mixture used for the inner layer(s).
• the fibrous substrate (pad) to be used has a basis weight of 100 g/m 2 to 350 g/m 2 , preferably 175 g/m 2 to 275 g/m 2 , more preferably 200 g/m 2 to 250 g/m 2 . It comprises or consists of cellulosic fibres, preferably cotton fibers.
• Suitable cellulosic fibers in particular natural cellulosic fibers, can be selected from "primary" fibrous materials (e.g. raw pulps) or secondary fibrous materials, whereby a "secondary" fibrous material includes recycled fibres.
• the primary fibrous materials may relate both to a chemically digested pulp and to mechanical pulp such as thermorefiner mechanical pulp (TMP), chemothermorefiner mechanical pulp (CTMP) or high temperature chemithermomechanical pulp (HTCTMP). Fibers of softwood (usually originating from conifers), hardwood (usually originating from deciduous trees) or from cotton linters can be used for example.
• Fibres from esparto (alfa) grass, bagasse (cereal straw, rice straw, bamboo, hemp), kemp fibers, flax, and other woody and cellulosic fiber sources can also be used as raw materials. Preference is given to the use of natural fibers such as cotton fibers.
• the cellulosic fibers, preferably cotton fibers can be bleached or unbleached.
• the cellulosic fibres to be used are preferably "natural" cellulosic fibres, i.e. cellulosic fibres originating from plants which have not been subjected to any regeneration process wherein the cellulosic material is dissolved and regenerated in fibrous form. The term "natural” therefore also includes secondary, in particular recycled fibres.
• the fibrous substrate (pad) comprises less than 50 wt.-% of synthetic fibers, preferably up to 30 wt.-% of synthetic fibers, more preferably up to 20 wt.-% of synthetic fibers, e.g. up to 10 wt.-% of synthetic fibers, or up to 5 w.-% of synthetic fibers, based on the total weight of the fibrous substrate.
• the synthetic fibers are preferably selected from synthetic fibres such as viscose fibers, polyester fibers, polypropylene fibers, and mixtures thereof. If the fibers are to be thermobonded, polyester fibers and/or polypropylene fibers or mixtures thereof with viscose fibers are preferably used.
• the fibrous substrate (pad) preferably shows one or more of following properties:
• a tensile strength in the dry state of at least 4 N, preferably at least 7 N, e.g. at least 16 N in the cross direction (CD), as measured in US 2003/0104036 Al.
• the fibrous substrate (pad) has two outer surfaces.
• the skin-cleansing article is preferably obtained by applying the cleansing lotion to one outer surface (the treated outer surface).
• the cleansing lotion does not fully impregnate the fibrous substrate but rather is present on the treated outer surface in a greater amount than on the other outer surface.
• This inhomogeneous distribution of cleansing lotion can also be described as a concentration gradient with the greatest amount of cleansing lotion being present on the treated outer surface.
• This relief or pattern constitutes a visible signal to the user of the skin-cleansing article that the outer surface carrying the same is more effective in cleansing the skin. This brings along the additional benefit that the treated surface comprising the greater amount of cleansing lotion is brought into contact with the skin of the user.
• the application technique for the cleansing lotion is selected from suitable, preferably contact-free, application techniques known in the art such as die coating (slot die coating) and spray coating.
• die coating slot die coating
• spray coating The benefit of slot die coating is that it is highly scalable and suitable for rapidly depositing thin and uniform films with minimal material waste and lower operational costs.
• the water content of the skin-cleansing article is less than 12 wt.-%, preferably less than 10 wt.-%, more preferably less than 8 wt.-%, e.g. less than 7 wt.-%, based on the total weight of the article.
• This relatively low water amount is advantageous since it makes it possible to dispense with the use of preservatives, such as antibacterial components in the cleansing lotion.
• the cleansing lotion is free of preservatives, such as antibacterial actives.
• the cleansing lotion may also be free of pH adjusting compounds, such as organic acids, which also may have an antibacterial effect.
• This amount of water can be obtained by suitably adjusting the amount of water in the fibrous substrate (pad) and/or cleansing lotion.
• the cleansing lotion to be applied to the fibrous substrate (pad) has a water content of less than 10 wt.-%, preferably less than 5 wt.-%, e.g. less than 3 wt.-%, based on the total weight of the cleansing lotion.
• the water activity of the finished skin-cleansing article is preferably not more than 0.7, more preferably not more than 0.65 (each measured at 23 ⁇ 1°C as described in the examples).
• the fibrous substrate for instance a pad fully made of cotton (in the following also referred to as "cotton pad”) is slightly overdried before the cleansing lotion is applied thereto (note: the term “cotton pad” does not exclude the presence of any (synthetic) yarns possibly used to provide one surface thereof with a visible pattern in accordance with the aforementioned techniques).
• the term “overdried” means in this context that the moisture content of the fibrous substrate (pad) is lower than that obtainable by storing the pad at room temperature (20°C) and humidity (40-50%) until the equilibrium moisture content has been reached.
• the equilibrium moisture content is about 8% wt.-% and an "overdried" pad may have a moisture content of 5 to 7 wt.-%, e.g. 7 wt.-%.
• a moisture content lower than the equilibrium moisture content can be obtained by suitably adapting the manufacturing conditions and/or drying conditions for the fibrous substrate (pad), e.g. cotton pad, prior to the application of the cleansing lotion.
• the use of an overdried fibrous substrate (pad) helps to fix the cleansing lotion on the surface to which it has been applied. It is one benefit of the method of manufacturing the skin-cleansing article (pad) that, after the application of the lotion, no drying step is required. This simplifies the process, saves energy and allows the use of ingredients that are sensitive to heat.
• the skin-cleansing article according to the invention comprises in one embodiment the cleansing lotion in an amount of 0.1 to 1.2 g, preferably in an amount of 0.15 to 1.0 g, more preferably in an amount of 0.20 to 0.8 g, per 1 g of the fibrous substrate (which may have reached its equilibrium moisture content or is overdried as explained above).
• the cleansing lotion to be applied to the fibrous comprises:
• a surfactant or surfactant mixture comprising at least one surfactant (al) having an HLB value of at least 6.5 and not more than 16, preferably 7 to 12, e.g. 7 to 10;
• the water content of the skin-cleansing article being less than 12 wt.-%, preferably less than 10 wt.-%, more preferably less than 8 wt.-%, based on the total weight of the article.
• the surfactant is a non-ionic surfactant, respectively, the surfactant mixture to be used includes only non-ionic surfactants.
• the non-ionic surfactant can be selected from any non-ionic surfactant showing the required HLB values including ester-linked non-ionic surfactants, ether-bonded non-ionic surfactants and amide-linked nonionic surfactants.
• the ester-linked non-ionic surfactants include e.g. esters of glycol and fatty acid, esters of glycerol and fatty acid, esters of polyglycerol and fatty acid, esters of polyethylene glycol and fatty acid (these are mixtures of mono- and di-esters obtained by the reaction of ethylene oxide with a fatty acid or a mixture of fatty acids.
• ethylene oxide glycol also referred to as "polyoxyethylene” (POE) may vary), esters of sucrose and fatty acid, esters of sucrose and triglyceride esters (sometimes called “sucroglycerides”), esters of sorbitan and fatty acid (surfactants with a lipophilic tendency), polyoxyethylene (POE) sorbitan esters, polyoxyethylene sorbitan esters (POE sorbitan esters are sometimes called polysorbates or esters of polyoxyalkylene polyols).
• Ether-bonded non-ionic surfactants include ethers of POE and alkylphenol (they are also called “polyoxyethylenated alkylphenol”), ethers of POE and fatty alcohol (“polyoxyethylenated alcohols").
• Amide-linked nonionic surfactants include polyoxyethylenated alkylamides.
• HLB hydrophilic-lipophilic balance
• the fatty acid residue typically has a carbon number ranging from 8 to 26.
• surfactant (al) examples include to propylene glycol monostearate (HLB 7.5), tetraethylene glycol monostearate (HLB 7.7), polyethylene glycol sorbit lanolin derivate ( HLB 8.0), polyoxypropylene stearate (HLB 8.0), sorbitan monolaurate ("Span 20", HLB 8.6), sorbitan monolaurate ("Arlacel 20", HLB 8.6), polyoxyethylene-oxypropylene oleate (HLB 9.0), tetraethylene glycolmonolaurate (HLB 9.4), polyoxyethylene lauryl ether (“Brij 30", HLB 9.5), polyoxyethylene sorbitan monostearate (“Tween 61", HLB 9.6), polyoxyethylene sorbitan monooleate ("Tween 81", HLB 10.0) and fatty alcohol polyglycol ether ("Arlypon OAG", HLB 10.0); see e.g. Karlheinz Schrader, Kunststoffheinz Sch
• the at least one surfactant (al) having an HLB value of at least 6.5 and not more than 16, preferably 7 to 12, e.g. 7 to 10, among polyglycerol-based emulsifiers. More preferably esters of a fatty acid and a polyglycerol having on average 2 to 6 glycerol units, in particular 2 to 4 glycerol units are used (which preferably do not contain polyglycerol with more than 10 glycerol units).
• the fatty acid from linear, optionally hydroxy-substituted saturated or unsaturated fatty acids (examples for unsaturated acids are oleic acid or ricinoleic acid).
• the hydroxy-substituted saturated or unsaturated fatty acid may be present in polymerised form, as occurring e.g. in polyglcerol polyricinoleate emulsifiers.
• the polyricinoleate portion of these emulsifiers may include on average 2 to 5, e.g. two, three or four, polymerised ricinoleic acid units.
• the at least one surfactant (al) is a surfactant mixture (al) comprising at least two surfactants having an HLB value of at least 6.5 and not more than 12, preferably 7 to 10, wherein the first surfactant has a HLB value of 7.0 to 9.0 and the second surfactant has an HLB value greater than 9.1, e.g. 9.5. to 11.0.
• a "first surfactant" having a HLB value of 7.0 to 9.0 such as Hydriol PGMO.4, contributes to makeup removal efficiency.
• the surfactant (al) or the surfactant mixture (al) are present in a total amount of 5 to 40 wt.-%, preferably 10 to 30 wt.-%, e.g. 12 to 22 wt.-%, based on the total amount of the cleansing lotion (which is the basis for all wt.-% values indicated for lotion components if not stated otherwise).
• the surfactant mixture further comprises (a2) at least one surfactant which has an HLB value of 2 to 6, preferably 2 to 5, e.g. 2 to 4.
• the function of the at least one surfactant (a2) with a low HLB value is to stabilise the surfactant or surfactant system (al) which is primarily responsible for the self-emulsifying effect.
• the low HLB surfactant (a2) also helps to solubilise the high HLB surfactant(s) in the oil component.
• At least one surfactant (a2) can be selected from known surfactants having this HLB range, which sometimes are also referred to as W/O emulsifiers.
• surfactant (a2) include ethylene glycol monostearate (HLB 2,7), pentaerythritol monostearate (HLB 3,1), pentaerythritol sesquioleate (HLB 3,1), glycerol monooleate (HLB 3,3), propylene glycol monostearate (HLB 3,4), glycerol monooleate (HLB 3,4), ethylene glycol fatty acid ester (EMCOL EL-50, Emulsol, Corp, HLB 3,6), sorbitan sesquioleate (HLB 3,8), glycerol monostearate (HLB 3,8), glycerol monostearate (HLB 3,8), glycerol monostearate (HLB 3,8), glycerol monostearate (HLB 3,8), glyce
• the total amount of the at least one surfactant (a2) is 0.5 to
• the total amount of the at least one surfactant (a2) is lower than the total amount of the at least one surfactant (al). More preferably, the total amount (wt.) of surfactant(s) (a2) is not more than 80% of the total amount (wt.) of surfactant(s) (al), preferably not more 50%, e.g. not more than 30%.
• the at least two surfactants comprised in the surfactant mixture (al) are selected from (i) esters of a fatty acid and a polyglycerol, the ester including on average 4 repeating units of glycerol and a fatty acid having a number of carbon atoms of
• the at least one surfactant (a2) is selected from esters of a fatty acid and polyglycerol, the ester including on average 3 repeating units of glycerol and a fatty acid having a number of carbon atoms of 16 or more, preferably 16 to 26, e.g. 16 to 22, which may be substituted with a hydroxy group bound in the fatty acid chain, or a polymer of the hydroxy group - substituted fatty acid, e.g. polyglyceryl-3 polyricinoleate (e.g. Soldoc PGPR, for which the manufacturer indicates an HLB value of 2.3).
• esters of a fatty acid and polyglycerol the ester including on average 3 repeating units of glycerol and a fatty acid having a number of carbon atoms of 16 or more, preferably 16 to 26, e.g. 16 to 22, which may be substituted with a hydroxy group bound in the fatty acid chain, or a polymer of the hydroxy group - substituted
• polyglycerol-based emulsifier which can be used in the present invention depending on their HLB value, include but are not limited to polyglyceryl-4 caprate, polyglyceryl-4 caprylate/ca prate, polyglyceryl-4 laurate, polyglyceryl-4 cocoate, polyglyceryl- 4 myristate, polyglyceryl-6 caprate, polyglyceryl-6 caprylate/ca prate, polyglyceryl-6 laurate, polyglyceryl-6 cocoate, polyglyceryl-6 myristate.
• the skin cleansing lotion has a viscosity of 5 mPa-s to 100 mPa-s measured with viscometer Brookfield LV DV-I, spl 100 rpm at 25°C.
• the oil component (b) comprises at least one liquid oil selected from fatty esters, glycerides, natural plant oils and hydrocarbon-based oils.
• the total amount of the oil component (b) is preferably 40 to 80 wt.-%, more preferably 60 to 80 wt.-%.
• the oil component (b) contains at least one oil selected from among the following types:
• Fatty acid esters (sometimes also referred to as “waxy esters", if they have a higher molecular weight and a plastic (“waxy”) consistency), preferably having the following generic formula (I)
• R OQ-R 2 (I) wherein R ⁇ CO represents a linear or branched acyl residue having 6 to 22 carbon atoms and 0, 1, 2, or 3 double bonds, and R 2 represents a linear or branched alkyl or alkenyl residue having 3 to 22 carbon atoms.
• the total number of carbon atoms in the ester is at least 18.
• fatty or waxy esters are isopropyl palmitate, myristyl myristate, myristyl palmitate, myristyl stearate, myristyl behenate, myristyl erucate, cetyl myristate, cetyl isostearate, cetyl oleate, cetyl behenate, cetyl erucate, stearyl mystrate, stearyl palmitate, strearyl stearate, stearyl isostearate, stearyl oleate, stearyl behenate, stearyl erucate, isostearyl myristate, isostearyl palmitate, isostearyl stearate, isostearyl isostearate, isostearyl oleate, isostearyl behenate, oleyl myristate, oleyl palmitate, oleyl stearate, oleyl isostearate,
• esters may also be used: esters derived from linear Cg- C22 fatty acids and branched-chain alcohols, e.g. 2-ethyl hexanol; ester of C18- C38-a Ikyl hydroxy carboxylic acids and linear or branched Cg-C22 f att y alcohols; or ester of linear and/or branched fatty acids and polyhydric alcohols (such as propylene glycol, dimerdiol or trimertriol) and/or guerbet alcohols, as well as ester of Cg-C22 fatt y alcohols and/or guerbet alcohols with aromatic carboxylic acids, in particular benzoic acid; ester of C2-C12 dicarboxylic acids and linear or branched alcohols having 1 to 22 carbon atoms or polyols having 2 to 10 carbon atoms and 2 to 6 hydroxy groups.
• esters derived from linear Cg- C22 fatty acids and branched-chain alcohols e.
• esters examples falling within this this group of esters include 2- ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, dioctyl malate, diisobutyl adipate, di-2-heptylundecyl adipate, 2-ethylhexyl succinate, diisostearyl malate, diisopropyl sebacate, trimethylolpropane triisostearate, neopentyl glycol di-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, neopentyl glycol dicaprate, and pentaerythritol tetra rosinate.
• Glycerides which are mono-, di- and/or tri ester (fatty acid ester) of glycerol (in particular di- and/or triester). Glycerides can be obtained by chemical synthesis or from natural sources (plant or animal) as known in the art. "Glycerides" from natural sources typically have been isolated and further purified, followed by optional modification processes. Preferably the fatty acid component has from 6 to 24, more preferably 6 to 18, in particular 8 to 18 carbon atoms. The fatty acid can be branched or unbranched as well as saturated or unsaturated. According to the invention, the use of caprylic/capric glyceride is preferred.
• Natural plant oils such as argan oil (argania spinosa kernel oil), soja oil, peanut oil, olive oil, sunflower oil (helianthus annuus seed oil), macademia nut oil, jojoba oil, avocado oil, linseed oil, almond oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil, evening primrose oil, corn oil, rapeseed oil, horse fat, palm oil, palm kernel oil, castor oil, coconut oil, hardened coconut oil. These oils can be used alone or in combination.
• natural oil we understand oils which have been obtained by extracting, pressing or other isolation techniques from plants or plant materials such as seeds, kernels, nuts, etc.. While these natural plant oils may have been purified, they have normally not been processed and/or modified to an extent that the natural composition of the oil is no longer recognisable.
• Hydrocarbon-based oils having preferably from 8 to 30, in particular 15 to 20 carbon atoms, such as squalane, squalene, paraffinic oils, isohexadecane, isoeicosane, polydecene or dialkycyclohexane, or mineral oil.
• the oil component (B) includes a mixture of at least two oils, the first oil being selected from the above fatty acid esters, such as isopropyl palmitate, and glycerides, such as caprylic/capric glyceride, and the second oil being a natural plant oil, such as argania spinosa kernel oil (“argan oil").
• first oil being selected from the above fatty acid esters, such as isopropyl palmitate, and glycerides, such as caprylic/capric glyceride
• the second oil being a natural plant oil, such as argania spinosa kernel oil (“argan oil”).
• the oil component (B) includes a mixture of at least three oils, the first oil being selected from the above fatty acid esters, such as isopropyl palmitate, the second oil being selected from glycerides, such as caprylic/capric glyceride, and the third oil being a natural plant oil, such as argania spinosa kernel oil.
• Argan oil is considered to have a skin care effect and may also contribute to the self-emulsifying effect upon contact of the cleansing lotion with water.
• Argan oil may be present in relatively low amounts ranging from 0.1 to 5 wt.-%, e.g. 0.1 to 1 wt.-%, based on the total amount of the cleansing lotion.
• the cleansing lotion of the invention comprises:
• a surfactant mixture comprising at least one surfactant (al), e.g. one, two or three surfactants, having an HLB value of at least 6.5 and not more than 12, preferably 7 to 10 and (a2) at least one surfactant, e.g. one or two surfactants, which have an HLB value of 2 to 6, preferably 2 to 5, e.g. 2 to 4,
• the cleansing lotion comprises:
• surfactant mixture comprising at least one surfactant (al), e.g. one, two or three surfactants, having an HLB value of 7 to 10, and (a2) at least one surfactant, e.g. one or two surfactants, which has an HLB value of 2 to 5, e.g. 2 to 4,
• an oil component comprising at least one liquid oil selected from fatty esters, glycerides, natural plant oils and hydrocarbon-based oils, preferably a fatty ester oil and/or a glyceride,
• the cleansing lotion according to in the above embodiments (El) and (E2) does not comprise any further ingredients, except for water.
• the cleansing lotion may optionally also include a humectant which protects the skin against dehydration and may also increase the softness of the lotion- treated surface of the pad.
• a humectant which protects the skin against dehydration and may also increase the softness of the lotion- treated surface of the pad.
• the amount of humectant(s) such as glycerol, may range from 1 to 15 wt.-%, preferably 1 to 10 wt.-%, e.g. 1 to 5 wt.-%.
• humectants include: glycerol, polyalkylene glycols, e.g. polyethylene glycol or polypropylene glycol, for instance polyethylene glycol having a weight average molecular weight of from about 200 to 600; neopentyl alcohols such as pentaerythritol or neopentyl glycol; sugar alcohols such as threitol, erythritol, adonitol (ribitol), arabitol, xylitol, dulcitol, mannitol and sorbitol, carbohydrates such as D (+)- glucose, D (+)- fructose, D (+)- galactose, D (+)- mannose, L-gulose, saccharose, galactose, maltose, polyglycerols, polyoxypropylene adducts of glycerol, methoxypolyethylene glycol, polyethylene glycol ethers of sugar alcohols
• Hyaluronic acid may also be used as humectant.
• Humectants being liquid at room temperature (20°C) are preferred.
• One more preferred humectant is glycerol.
• the humectant can also be used to adjust the viscosity of the final lotion.
• the total water content in embodiments (El) and (E2) is preferably adjusted to 1.8 to 2.2 wt.%.
• the cleansing lotion may further comprise 0.1 to 5 wt.-%, e.g. 0.5 to 2 wt.-% additives.
• Suitable additives may be selected from known cosmetically acceptable additives, including the following:
• pH adjusting components such as buffering substances, e.g. mixtures of water- soluble organic acids and their corresponding salts (e.g. citric acid/citrate salt);
• cosmetic agents preferably from natural sources (plant extracts), having for instance a skin-soothing, antiphlogistic (reduction of skin irritation), cellregenerating, anti-inflammatory and/or anti-itch effect such as allantoin; aloe vera extract; chamomile extract containing azulene and a-bisabolol; echinacea; dragosantanol; panthenol; liquorice root extract containing 18-glycyrrhetinic acid; lime tree extract containing quercetin and/or glyco-rutin; marigold; urea; phytosterols, optionally ethoxylated (available from Henkel under the tradename "Generol”); chitosan (acetylated chitin); anthocyanidins; ginkgo leaf extract containing quercetin and rutin; horse chestnut containing quercetin and campherol; vitamins or provitamins such as provitamin B5 or Vitamin E; birch extract
• the cleansing lotion is free of dyes.
• the cleansing lotion may be free of cosmetic agents and/or gelling agents.
• the above cleansing lotion of the invention see embodiments (El) and (E2), which is preferably used in the skin-cleansing article (pad) of the invention, preferably shows the features described herein and the claims for the cleansing lotion to be applied to the substrate (pad).
• the surfactant or surfactant mixture (a) is selected from esters of a fatty acid and a polyglycerol having on average 2 to 6 glycerol units, in particular 2 to 4 glycerol units (which preferably do not contain polyglycerol with more than 10 glycerol units).
• the oil component (b) of the cleansing lotion preferably comprises argania spinosa kernel oil in an amount of 0.1 to 5 wt.-%, based on the total amount of the cleansing lotion.
• the water activity was determined with a hygrometer Testo 645 (available from Testo GmbH, Austria) and a pressure-tight precision humidity probe device (available from Testo GmbH, Austria; ref. 0628 0024).
• the sample to be tested i.e. lotion or finished product
• the sample was placed in an oven at 25°C for 4 hours prior to the measurement.
• the sample was placed in a sample bowl provided with the humidity probe device: the lotion was poured into the bowl, and the finished product was cut in small strips and filled into the bowl.
• the filled sample bowl was introduced into the measurement chamber of the device.
• the device was closed and allowed to stand for 20 min for stabilization.
• the value of the relative humidity is measured, and the water activity is calculated therefrom (the value of the water activity is obtained by dividing the value of the relative humidity by 100).
• the measurement is repeated in triplicate.
• the sample bowl is cleaned and dried between each measurement.
• a mixture (A) was obtained by stirring a mixture of polyglyceryl-3 polyricinoleate (manufactured by Industrial Quimica Lasem), polyglyceryl-3 caprate (manufactured by Evonik Industries AG, Germany) and polyglyceryl-4 oleate (manufactured by Hydrior AG, Switzerland) until complete dissolution (mixing conditions: Ystral, 600 -lOOOrpm).
• a mixture (B) was obtained by stirring water and glycerol (manufactured by Arcane Industries) until complete dissolution. The mixture (B) was then quickly added to the mixture (A) under stirring (mixing conditions as above).
• the water content in the lotion was 2.0% by mass.
• the water activity of the lotion as such was 0.68 (at 23°C) and that of the finished product 0.61 (at 23°C). Because of the small water content in the lotion, it was not necessary to add preservatives.
• the target viscosity of the lotion was 5 - lOOcP (mPa-s) measured at 25°C (Brookfield viscometer LV-DV-I, spindle 1, velocity lOOrpm).
• the prepared lotion was applied by slot die coating on one surface of a cotton pad (210 g/m 2 ) in an amount of 80 g/m 2 (total amount of lotion per pad: 0,4008g).
• the cotton pad had a rectangular shape (ca. 6 x 8.5cm; 0.00501 m2) with two outer layers and an intermediate cotton fluff layer interposed therebetween. It was manufactured as described in US 2009/0068409 Al. One surface had a raised pattern of parallel lines (4 per cm, parallel to the short edge) defined thereupon. The cotton pad was made to 100% from cotton fibers using a hydroentangling method.
• the cotton pad was slightly overdried and contained 7 wt.-% of water.
• the water in the finished product was 5.6 wt.-% by mass.
• the finished product had a dry and slightly oily touch. No further drying was necessary.
• a skin-cleansing pad was prepared in a similar manner as described in Example 1 by treating a small round pad (grammage 210 g/m ⁇ , size 25.504 cm ⁇ , weight 0.5356g, diameter 57mm) with the cleansing lotion described in example 1.
• the impregnation rate was 78.40 g/m ⁇ .
• the lotioned pads prepared in example 3 were tested in regard to their cleansing efficiency in make-up removal after the cleansing lotion had been activated by adding 2 g of tap water to each pad ("moistened pad"). Makeups were applied on five different zones of forearms of five volunteers as shown in following Table 3. No hydrating cream was used before the application of the makeup. Following the application of the makeup and a 5-minute pause thereafter, the cleansing test was carried out by passing the moistened pad five times in one direction. Due to the prior treatment with water and the formation of an aqueous lotion, no further rinsing with water was required to remove any remaining lotion from the skin. This was perceived by the volunteers as major benefit of the lotioned pad of the invention.
• Cleansing efficiency of the moistened pad was measured on the forearm by using a CM-700d spectrophotometer equipped with the software Spectra Magic NX (both available from Konica Minolta).
• Zone 3 The score for Zone 3 was 1.19, indicating that the mascara was removed with good efficiency with the moistened pad.
• the skin-cleansing pad of Example 1 was tested over a period of one month as to whether unacceptable changes of its appearance, color, odor or pH could be noticed.
• the testing conditions included 20 to 25°C (no RH), natural light and sunlight, storage in an oven at 40°C and 50°C (no RH) and storage at 4°C. Essentially in all these testing conditions, the skincleansing pad passed the test. Only at 50°C (no RH) and if exposed to natural light or sunlight, a slight or very slight decrease of fragrance was observed which however was acceptable. Further, no unwanted bacterial growth was observed in any of the tested samples. In all cases the number of bacteria was less than lOOCFU/g which was below the targeted product specification.
• Example 1 A sample of the lotion described in Example 1 was diluted at 14.3 % with water for injection.
• the skin irritation potential of the diluted lotion was measured in vitro by a technique adapted from that described by Luepke N.P. and Kemper F.H. (The Het-Cam test: "An alternative to the Draize eye test”. Food Chem. Toxicol. 1986, 24, n° 6/7, 495-496).
• the sample was judged "practically non- irritant" towards the chorioallontoic membrane of embryonic hen's eggs.

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