EA038652B1 - Personal care composition - Google Patents

Abstract

Disclosed is a personal care composition comprising boron nitride in combination with a non-silicone polyolefin particle in a cosmetically acceptable carrier to provide benefits of enhanced skin appearance.

Description

The technical field to which the invention relates

The present invention relates to a personal care composition. In particular, the personal care composition aims to provide an improved appearance to the skin, such as improved smoothing of the appearance and reduced sheen. This effect is achieved by including in the personal care composition turbostratic boron nitride particles in combination with specific polyolefin particles.

Background of the invention

Aging causes many changes in the appearance of the skin. Reducing or eliminating skin imperfections such as wrinkles, age spots or general unevenness in skin tone is especially important for people looking to maintain the appearance of youthful skin. Another preferred property of leather is shine reduction. Shiny skin is indicative of oiliness, which is a trait that many consumers dislike. Most people prefer the matte look of their skin.

Significant efforts have been made in the cosmetic industry to create compositions that can mask or at least reduce skin imperfections. This is often achieved by using materials such as talc, silica, kaolin, and other inorganic particles. These inorganic particles achieve a matte effect due to their optical properties.

An alternative approach is known as achieving a smooth appearance effect. In this case, the incident light is distorted by scattering (lens effect). The components of the cosmetic composition in this mechanism act as lenses to bend and rotate light in different directions.

Unfortunately, traditional approaches either hide imperfections in the absence of brightness, or provide brightness and healthy glow, but with an aesthetically unpleasant appearance of the skin, for example, by enhancing the appearance of skin topography.

The present inventors have found that there is still a need for a composition that is capable of imparting a better smoothing effect to the skin while providing a reduced shine. Therefore, after extensive experimentation, the inventors have developed a personal care composition comprising turbostratic boron nitride particles in combination with nonsilicone polyolefin particles of a certain size in a cosmetically acceptable carrier, which has a higher smoothing effect on the appearance.

The document US2016067157 (Avon) discloses a method for instantly reducing the appearance of wrinkles and skin imperfections while smoothing the appearance of the skin, which includes the application of a cosmetic composition containing a gel based on fractal particles.

US2002192252 (Procter & Gamble) refers to substantially uniform, discontinuous films of a skin care product having a defined average particle size, particle spacing and coverage. These films provide improved skin appearance such as good visible coverage and a natural look. The present inventors tried the combination of boron nitride and ethylene acrylate copolymer disclosed in this publication and found that the smoothing performance of the present invention is significantly better than that obtained with the known combination.

Thus, it is an object of the present invention to provide a personal care composition that provides an improved appearance to the skin through enhanced smoothing of the appearance.

Brief disclosure of the essence of the invention

In a first aspect, the present invention relates to a personal care composition comprising:

a) turbostratic boron nitride particles;

b) non-silicone polyolefin particles having an average size in the range of 0.5 to 5 microns; and

c) a cosmetically acceptable carrier.

In a second aspect, the present invention relates to a method for improving the appearance of skin by providing enhanced smoothing of appearance and reducing gloss, comprising the step of applying the composition of the present invention to a skin surface.

In a third aspect, the present invention relates to the use of a composition of the present invention for reducing the appearance of fine lines, wrinkles, pores and / or blemishes; to even out skin tone, or a combination of these effects on the skin surface.

Detailed description of the invention

These and other aspects, features and advantages of the invention will become apparent to those skilled in the art upon reading the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present invention may be used in any other aspect of the invention. The term containing means including, but not

- 1 038652 necessarily consisting of or composed of. In other words, the steps or options listed are not necessarily exhaustive. It is noted that the examples set forth in the description below are intended to illustrate the invention and are not intended to limit the invention to these examples as such. Likewise, all percentages are weight / weight percentages unless otherwise indicated. Except for the working and comparative examples, or where explicitly indicated otherwise, all numbers in the present description and the claims determining the amount of material or reaction conditions, physical properties of materials and / or use, should be understood as preceding the word approximately. Numeric ranges expressed in the format x through y are to be understood as including x and y. When several preferred ranges are given for a particular feature in the format from x to y, it should be understood that all ranges combining different end points are also encompassed by the invention.

The disclosure provided herein is to be construed as covering all embodiments that are found in the claims as multiply dependent on each other, regardless of the fact that the claims may be cited without multiple dependence or redundancy.

By a personal care composition, as used herein, it is meant that the composition comprises a composition for topical application to the skin of mammals, especially humans. Such a composition can generally be classified as indelible or rinse off, but is preferably of the indelible type. The composition is formulated as a product that is applied to the human body specifically to enhance appearance, but which may also be capable of providing cleansing, odor control, or overall aesthetics. The composition of the present invention can be in the form of a liquid, lotion, cream, foam, scrub, gel or tonic, or applied by means of a device, or through a face mask or tampon. Non-limiting examples of such compositions include leave-in skin care lotions, creams, antiperspirants, deodorants, lipsticks, foundations, mascara, sunscreens, and sunscreen lotions. The composition of the present invention is preferably a leave-in composition. Used in this application, the term skin means the skin on the face and body (eg, neck, chest, back, shoulders, armpits, hands, legs, buttocks and scalp), and especially in areas exposed to the sun.

The term turbostratic boron nitride (t-BN) as used herein refers to boron nitride having oxygen impurities in the boron nitride crystal lattice.

Non-silicone polyolefin particles as used herein refer to olefin polymers that are substantially free of silicone monomers and are in particulate form.

The term specific surface area, as used herein, refers to the specific surface area determined by the Brunauer-Emmett-Teller method. Specific surface area is measured by meeting the requirements of ASTM D 3663-78.

Average particle size in the context of the present invention refers to the size of the particles in a non-aggregated state, unless otherwise indicated. The median particle size in accordance with the present invention is the apparent volumetric median diameter (d ₅₀ , also known as x50 or sometimes d (0.5) of the particles, as measured, for example, by laser diffraction using a system such as the Mastersizer ™ 2000. available from Malvern Instruments Ltd) complying with the requirements set out in ISO 13320 unless otherwise specified. A d value of ₁₀ means that 10% of the particles in the sample are finer than this particle size. A d ₉₀ value means that 90% of the particles in the sample are finer than this particle size.

Boron nitride (BN) is a chemically inert non-oxide ceramic material that exists in several crystalline varieties, including the cubic structure of BN (c-BN), similar to diamond, and the hexagonal structure of BN (h-BN), similar to graphite [ref: Journal of Materials Science & Technology, Volume 31, Issue 6: 589-598; US2012058342]. In particular, h-BN is widely used in personal care products to which it imparts a number of preferred properties such as softness, adhesion, coating and natural appearance due to its layered structure and moderate reflectivity. In addition, according to the level uniformity of the hexagonal crystal structure, there are various types of h-BN, i.e. graphite, turbostratic and quasi-graphite.

1) Graphite BN (g-BN) - The purest BN crystals in which all the hexagonal BN crystals are aligned parallel to each other.

2) Turbostratic BN (t-BN) has an oxygen impurity in the BN crystal lattice. Some of the nitrogen (usually <2%) is replaced by oxygen. The presence of oxygen distorts the crystal packing, and the BN planes are not quite parallel to each other, as in the case of graphite BN. These turbostratic BN crystals have a matte effect because they have less specular reflection.

3) Quasi-graphite BN represents a cross between these two morphologies.

Boron nitride for use in the present invention is preferably turbostratic boron nitride. Typically, turbostratic boron nitride has an average particle size in the range

- 2,038652 zone from 100 nm to 10 microns. Preferably, the size of the non-aggregated particles (as measured using SEM) is in the range from 100 nm to 1 micrometer. The particles usually aggregate on storage and the average particle size when measured as aggregates using a technique such as dynamic light scattering (DLS) is preferably in the range of 0.5 to 15 microns, more preferably in the range of 3 to 12 microns. and most preferably in the range of 4 to 9 microns.

The specific surface area of the turbostratic boron nitride is preferably 5 to 80 m ² / g, more preferably 10 to 60 m ² / g, and even more preferably 15 to 40 m ² / g. According to particularly preferred aspects, the turbostratic boron nitride has a specific surface area of at least 10 m ² / g, more preferably at least 20 m ² / g, even more preferably at least 25 m ² / g.

The oxygen content of the turbostratic boron nitride is preferably at least 0.2% per mole of turbostratic boron nitride, more preferably 0.5 to 3%, even more preferably 1 to 2%, and most preferably 1.2 to 1, 8% per mole of turbostratic boron nitride.

The turbostratic boron nitride used in the present invention generally has a tapped bulk density in the range of 0.1 to 1 g / cm ^3, and more preferably 0.2 to 0.6 g / cm ³ . Tapped bulk density as used herein refers to the density of the powder. The tapped bulk density refers to values measured in accordance with the international standard ISO 787-11.

A particularly preferred turbostratic boron nitride is Softouch * CC6097 boron nitride powder from Momentive.

To better smooth the appearance of the skin, turbostratic boron nitride is preferably present in an amount of 0.1 to 15% by weight of the composition, more preferably 0.1 to 12%, even more preferably 0.4 to 8%, even more preferably 1 up to 5%, and most preferably from 2 to 4% by weight of the composition.

The composition of the invention contains non-silicone polyolefin particles with an average particle size of 0.5 to 5 microns, preferably 1.1 to 3.3 microns. Preferably, the polyolefin particles have a d ₁₀ value of more than 1.1 microns and a d ₉₀ value of less than 3.3 microns. The polyolefin particles are preferably homo- or copolymers, preferably copolymers of hydrocarbons having from 2 to 10 carbon atoms. The polyolefin preferably does not contain oxygen, silicon or nitrogen atoms in its structure. In addition, preferably, the polymer does not contain acrylate in its structure. Preferred olefins that are polymerized to form polymers include ethylene, propylene, octene, or combinations thereof. The most preferred non-silicone polyolefin is an ethylene / octene copolymer sufficiently polymerized to be in particulate form. These polyolefin particles are commercially available as Optitouch ™ from Dow Chemicals. The polyolefin particles preferably have a refractive index in the range of 1.4 to 1.6, preferably 1.45 to 1.55.

The non-silicone polyolefin particles are preferably included in an amount of 0.1 to 10%, more preferably 0.1 to 5%, by weight of the composition.

To achieve the best smoothing effect and / or opacity, the weight ratio of boron nitride to non-silicone polyolefin particles is preferably 1:10 to 10: 1, more preferably 1: 1 to 4: 1.

The composition may additionally contain other particulate active substances such as silica and / or a silicone elastomer to further enhance the smoothing performance. The silica particle, if included, is preferably porous silica, and preferably non-pyrogenic silica. Preferably, the porous silicon dioxide is hydrophilic. The porous silicon dioxide preferably has an average diameter of 200 nm to 40 microns, more preferably 0.6 to 25 microns, even more preferably 1 to 20 microns, even more preferably 1.5 to 12 microns, and most preferably 2 to 5 micron. Particularly preferred porous silica includes MSS-500 / 3H, MSS-500 / H from Kobo Products Inc. Porous silica, if present, is preferably present in an amount of 0.01 to 20% by weight of the composition, more preferably 0.05 to 14%, even more preferably 0.2 to 9%, even more preferably 0, 4 to 5% and most preferably 0.8 to 4% by weight of the composition.

The composition may optionally further comprise a silicone elastomer. The silicone elastomer used in the present invention is preferably a silicone elastomer powder. Most preferably, the elastomer is crosslinked. Preferred silicone elastomers are organopolysiloxanes available under the INCI names dimethicone / vinyl dimethicone crosspolymer, dimethicone crosspolymer and polysilicone-11. More preferably, the silicone elastomer is a dimethicone / vinyl dimethicone crosspolymer.

Typically, the average diameter of the silicone elastomer is 0.2 to 50 microns, more preferably 0.5 to 20 microns, even more preferably 0.8 to 10 microns, and even more preferably 1.5 to 6 micron.

The silicone elastomer is preferably present in an amount of 0.5 to 20%, more preferably 1 to 15%, even more preferably 3 to 12%, even more preferably 4.5 to 9%, by weight of the composition.

Preferably, the composition further comprises a whitening pigment. Whitening pigments are usually particles of materials with a high refractive index. For example, the whitening pigment may have a refractive index greater than 1.3, more preferably greater than 1.8, and most preferably 2.0 to 2.7. Examples of such whitening pigments are those that include bismuth oxychloride, barium sulfate, mica, silicon dioxide, titanium dioxide, zirconium oxide, alumina, zinc oxide, or combinations thereof. A more preferred whitening pigment is particles containing titanium dioxide, zinc oxide, zirconium oxide, mica, iron oxide, or a combination thereof. An even more preferred whitening pigment is particles containing zinc oxide, zirconium oxide, titanium dioxide, or a combination thereof, since these materials have a particularly high refractive index. Even more preferably, the whitening pigment is selected from titanium dioxide, zinc oxide, or a mixture thereof, and the most preferred whitening pigment is titanium dioxide.

The average diameter of the whitening pigment is typically 15 nm to 2 microns, more preferably 35 to 800 nm, even more preferably 50 to 500 nm, and even more preferably 100 to 300 nm. The diameter of the whitening pigment refers to the diameter of the particles in the non-aggregated state. If a well-defined sphere is not created, diameter means the largest measurable distance in the particle. The average diameter can be measured, for example, by scanning electron microscopy (SEM) or transmission electron microscopy (TEM) by averaging the value of at least one hundred particles.

Preferably, the composition contains the whitening pigment in an amount of 0.001 to 10 wt%, more preferably 0.01 to 6 wt%, even more preferably 0.1 to 3 wt%, and most preferably 0.2 to 2 wt%. %.

The composition preferably further comprises one or more organic sunscreens. A wide variety of organic sunscreens are suitable for use in combination with the main ingredients of the invention. Suitable UVA / UV-B sunscreens include 2-hydroxy-4-methoxybenzophenone, octyldimethyl p-aminobenzoic acid, digalloyl trioleate, 2,2-dihydroxy-4-methoxybenzophenone, ethyl 4- (bis (hydroxypropyl)) aminobenzoate, 2ethylhexyl -cyano-3,3-diphenyl acrylate, 2-ethylhexyl salicylate, glyceryl p-aminobenzoate, 3,3,5trimethylcyclohexyl salicylate, methylanthranilate, p-dimethylaminobenzoic acid or aminobenzoate, 2-ethylhexyl-p-dimethyl-2-phenobenzoate sulfonic acid, 2- (pdimethylaminophenyl) -5-sulfone-benzoxazoic acid, 2-ethylhexyl-p-methoxycinnamate, butylmethoxybenzoylmethane, 2-hydroxy-4-methoxybenzophenone, octyldimethyl-p-aminobenzoic acid, mixtures thereof. The most suitable organic sunscreens are 2-ethylhexyl-pmethoxycinnamate, butylmethoxydibenzoylmethane, or a mixture thereof.

A safe and effective amount of an organic sunscreen can be used in the compositions of the present invention. The composition preferably contains 0.1 to 10%, more preferably 0.1 to 5% organic sunscreen.

The composition of the invention preferably contains a skin whitening agent. Vitamin B3 compounds (including derivatives of vitamin B3), for example niacin, nicotinic acid or nicotinamide, are the preferred skin whitening agents according to the invention, nicotinamide being most preferred. The vitamin B3 compounds, when used, are preferably present in an amount ranging from 0.1 to 10%, more preferably 0.2 to 5%, by weight of the composition.

The composition may contain other useful skin care actives such as retinol, retinyl esters, resorcinol, allantoin, ubiquinone, conjugated linoleic acid, 12-hydroxystearic acid, or derivatives thereof. Of these, anti-aging actives such as retinol or retinyl esters are most preferred for inclusion in the composition of the invention.

The compositions of the present invention will also include a cosmetically acceptable carrier. In some embodiments, the carrier will be (or at least include) an emulsion of water and oil, which in certain embodiments may be a water-in-oil emulsion. However, the preferred emulsions are oil-in-water varieties.

Preferred hydrophobic material for use in the oil phase of such emulsions includes emollients such as fats, oils, fatty alcohols, fatty acids, soaps, silicone oils, synthetic esters and / or hydrocarbons.

Silicones can be classified into volatile and non-volatile varieties. Volatile silicone oils (if used) are preferably selected from cyclic (cyclomethicone) or linear

- 4,038652 polydimethylsiloxanes containing from 3 to 9, preferably from 4 to 5, silicon atoms.

Non-volatile silicones useful as an emollient material include polyalkylsiloxanes, polyalkylarylsiloxanes, and polyethersiloxane copolymers. Substantially non-volatile polyalkylsiloxanes used in this application include, for example, polydimethylsiloxanes with a viscosity of from about 5x10 ^-6 to 0.1 m ² / s at 25 ° C. Preferred non-volatile emollients used in the present compositions include polydimethylsiloxanes having a viscosity of about 1 x 10 ^-6 to 4 x 10 ⁴ m ² / s at 25 ° C.

Specific examples of non-silicone emollients include stearyl alcohol, glyceryl monoricinoleate, mink fat, cetyl alcohol, isopropyl isostearate, stearic acid, isobutyl palmitate, isocetyl stearate, oleyl alcohol, isopropyl laurate, hexyl oleoylaurate, isopropyl laurate, hexyl oleoylaurate, isopropyl alcohol eluate alcohol, cetyl palmitate, silicone oils such as dimethyl polysiloxane, di-n-butyl sebacate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, butyl stearate, polyethylene glycol, triethylene glycol, lanolin, cocoa butter, corn palm oil, rapeseed oil oil, evening primrose oil, soybean oil, sunflower oil, avocado oil, sesame oil, coconut oil, peanut oil, castor oil, acetylated lanolin alcohols, petroleum jelly, mineral oil, butyl myristate, isostearic acid, palmitic acid, isopropyl linoleactate, decylol eat, myristyl myristate and mixtures thereof. Essential emollients include:

a) alkenyl or alkyl esters of fatty acids having from 10 to 20 carbon atoms. Examples thereof include isoarachidyl neopentanoate, isodecyl neopentanoate, isononylisonanoate, cetyl ricinoleate, oleyl myristate, oleyl stearate, and oleyl oleate;

b) ethers of ethers such as fatty acid esters of ethoxylated fatty alcohols;

c) esters of polyhydric alcohols. Butylene glycol, ethylene glycol esters of mono- and di-fatty acids, diethylene glycol esters of mono- and di-fatty acids, polyethylene glycol (200-6000) esters of mono- and di-fatty acids, propylene glycol esters of mono- and di-fatty acids , polypropylene glycol 2000 monooleate, polypropylene glycol 2000 monostearate, ethoxylated propylene glycol monostearate, glyceryl esters of mono- and di-fatty acids, polyglycerol esters of poly fatty acids, ethoxylated glyceryl monosteylene glycolyne glycol, 1,3-mono-butylostylene β-distearate, polyoxyethylene polyol fatty acid ester, sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters are suitable polyhydric alcohol esters. Particularly useful are pentaerythritic, trimethylolpropane and neopentyl glycol esters of Ci-C ₃₀ alcohols. An example is pentaerythrityl tetraethylhexanoate;

d) esters of wax such as beeswax, spermaceti wax and tribegenin wax;

e) esters of sterols, examples of which are esters of cholesterol and fatty acids;

f) sugar esters of fatty acids such as sucrose polybehenate and sucrose polycottonsidate; or

g) mixtures of two or more of the above components (a) - (£).

In particular, C _12-15 alkyl benzoate esters sold under the brand name Finsolve can also be used.

Hydrocarbons that are suitable emollients include petrolatum, mineral oil, Cs-C ₁₃ isoparaffins, polyalphaolefins, isohexadecane, or a mixture thereof.

The amount of water in the carrier may be, for example, from 1 to 99%, more preferably from 5 to 90%, even more preferably from 35 to 80%, most preferably from 40 to 70% by weight of the personal care composition.

Other materials that can be included in a cosmetically acceptable carrier include solvents, humectants, thickeners, and powders. Examples of each of these types of materials, which can be used alone or as mixtures, are as follows.

Solvents include ethyl alcohol, isopropanol, acetone, ethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether, and mixtures thereof.

Humectants include humectants such as polyhydric alcohol. Typical polyhydric alcohols include polyalkylene glycols, and more preferably alkylene polyols and derivatives thereof, including propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol and derivatives thereof, sorbitol, hydroxypropyl sorbitol, hexylene glycol, 1,3-butylene glycol, isoprene glycol, glyoxyl, 1,2,6 propoxylated glycerin; and mixtures thereof. The amount of humectant may be, for example, 0.5 to 50%, more preferably 1 to 15%, by weight of the composition. Most preferred is glycerol (also known as glycerin). The amount of glycerin can be, for example, from 0.5 to 50%, more preferably from 1 to 35%,

- 5,038652 most preferably 2 to 15% by weight of the composition.

Various thickening agents can be included in the compositions. Illustrative but non-limiting examples are stearic acid, sodium acrylamide / acryloyyl dimethyl taurate copolymer (Aristoflex AVC), sodium hydroxyethyl acrylate / acryloyyl dimethyl taurate copolymer, aluminum starch octenyl succinate, polyacrylates (such as Carbopol9 Thickeners Pemulen TR-2® and Ultrez®), polysaccharides (including xanthan gum, guar gum, pectin, carrageenan and sclerotia gum), celluloses (including carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, tellulose methyl oxides (including dihydroxides) , mica and clays, the latter being represented by bentonites, hectorites and attapulgites), magnesium and aluminum silicate, and mixtures thereof. The amount of thickening agents can be, for example, from 0.05 to 10%, more preferably from 0.3 to 2% by weight of the composition.

Powders include chalk, talc, fuller's clay, kaolin, starch, gums, colloidal silica, sodium polyacrylate, tetraalkyl- and / or trialkylarylammonium smectites, chemically modified magnesium aluminosilicate, organically modified montmorillonite clay, hydrated sodium carboxylate silica, hydrated polymer sodium silicate carboxymethyl cellulose and ethylene glycol monostearate.

Preferably, the personal care composition has an L&W (folds and wrinkles) of at least -80% and is capable of maintaining skin lightening. More preferably, the personal care composition has an L&W index of -70% to 300% and is capable of improving skin lightening by at least 1. Even more preferably, the personal care composition has an L&W index of -45% to 200% and is capable of improving skin lightening by at least 1. Measurement of the L & W index is described in Example 2.

The personal care composition of the present invention is preferably a skin care composition. More preferably, the composition is preferably an antiperspirant composition or a composition for treating a face (other than eyelids and lips). A skin care composition refers to a composition suitable for topical application to human skin, including leave-in and rinse-off products. Preferably, this term encompasses a liquid composition, and in particular a humectant rather than a make-up product. Leave-in compositions are most preferred. The term indelible, as used in connection with the compositions in the present invention, means a composition that is applied to or rubbed into the skin and remains on it. The term rinse off, as used in connection with the compositions of the present invention, means a skin cleanser that is applied to the skin or rubbed into the skin and rinsed off substantially immediately after application. Used in this application, the term skin includes the skin of the face (excluding eyelids and lips), neck, chest, abdomen, back, shoulders, armpits, hands, and legs. Preferably, skin means skin on the face (excluding eyelids and lips) and armpits. More preferably, the term refers to the skin on the face other than the lips and eyelids.

The composition can be formulated in any known format, with creams or lotions being more preferred.

The packaging for the composition of the present invention can be a can or tube, as well as any other format commonly used for cosmetic, cream, detergent and lotion products. The compositions can be applied topically, and preferably 1-4 mg of the composition is applied per square centimeter of skin.

The composition of the invention preferably provides a cosmetic benefit to the skin of an individual to which it is topically applied. Examples of cosmetic benefits include reducing the appearance of fine lines, wrinkles, pores and / or blemishes; equalization of skin tone, or a combination of these effects on the skin surface.

The following examples are provided to facilitate understanding of the essence of the invention. The examples are not intended to limit the scope of the claims.

- 6 038652

Examples of

Material

Tradename INCI name Provider Average particle size (microns / Refractive index Softtouch * CC6097 Boron nitride (turbostratic type) Momentive 5 2.1 / 1.8 (1/11) SF-6 Boron nitride (graphite) Merck 4.5-8.5 2.1 / 1.8 (1/11) Optitouch Ethylene-octene copolymer dispersed in ethylene / acrylate copolymer Dow 1-2.5 1.51 EA209 Ethylene / Acrylic Acid Copolymer Granules KOBO 5-15 1.51 CL2080 Polyethylene KOBO 8-14 1.51 DC9509 Vinyl dimethicone / dimethicone crosspolymer Dow corning 3-5 1.41

# Average particle size of boron nitride is measured for aggregated particles using dynamic light scattering techniques and quoted by the material supplier.

(± / L) refers to the refractive index measured with perpendicular and parallel polarization, respectively.

Example A-D 1-2: Synergistic effect of combining boron nitride with non-silicone polyolefin particles.

A series of compositions for skin care were formulated as shown in table. 1.

Table 1

Ingredient Examples (active substance content, wt.%) A V 1 WITH 2 D Water Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Softtouch * CC6097 3.00 - 3.00 - - 3.00 Ethylene / Octene Copolymer # - 1.00 1.00 - 1.00 - SF-6 - - - 3.00 3.00 - DC9509 - - - - - 1.00 Tween 20 2 2 2 2 2 2 Glycerol 2 2 2 2 2 2 VP / VA copolymer 2.5 2.5 2.5 2.5 2.5 2.5 Cyclopentasiloxane (D5) 12 12 12 12 12 12 Simulgel EG 3 3 3 3 3 3 Preservative 0.5 0.5 0.5 0.5 0.5 0.5

# The ethylene-octene copolymer used here was obtained as Optitouch.

(1) Measurement of gloss before and after application of personal care compositions.

As a substrate for simulating wrinkles on human skin, folded plates Bio-skin (BP-EW1 #BSC, Beaulax Co., Ltd., Tokyo, Japan) made of polyurethane elastomer were used. To measure the gloss of the Bio-skin folded plates, the SAMBA dual polarization imaging system (Bossa Nova Technologies, USA) was used, in accordance with the method and principle described by Akira Matsubara [Skin translucency: what is it and how is it measured, The International Federation of Societies of Cosmetic Chemists (IFSCC) Congress 2006, Osaka, Japan]. For the analysis, a software called SAMBA face system (Version 4.3) was installed. Bio-skin folded plates have been tested against incident light with an exposure time of 80 ms. Operating mode: parallel polarization and cross-polarization modes. Then 28 mg of one sample prepared in Table 1 was applied and spread with fingertips within a 7 cm ² circle for gloss testing. After waiting for 30 minutes for the sample to dry naturally, the gloss of the folded Bio-skin plates was measured again using the SAMBA system.

(2) Calculation of the L&W index.

The incident light was reflected and scattered by the Bio-skin plates. The specularly reflected light retained the same polarization as the incident light, while the scattering light from the volume (diffuse light) was unpolarized. The SAMBA camera sequentially acquired two images corresponding to two states of polarization (parallel and transverse). The intensity of the parallel image (P) is introduced by both reflected and scattered light, and the intensity of the transverse image (C) is introduced only by the scattered light. The parallel image plus the cross-sectional image is equal to the total image obtained with a conventional camera or as perceived by the human eye.

Gloss was calculated from (P - C) / (P + C). The calculation of the degree of gloss was carried out for each pixel - 7,038652 L. The gloss standard deviation (STD) is a measure of the uniformity of the appearance of the skin. The higher the STD, the lower the uniformity. Here we define the L&W (lines and wrinkles) index to demonstrate how effective the skin care composition is in smoothing the appearance. The L&W Index is calculated using the formula (STD pre-sample gloss - STD post-sample gloss) / (STD pre-sample gloss). The higher the L&W index, the higher the appearance smoothing performance for the sample.

(3) Measurement of color effect.

A Bio-skin plate (color: 50 #, from BEAULAX, Co. Ltd., Tokyo, Japan) was used for color measurement. 0.5 g of the samples were evenly applied uniformly onto Bio-skin plates with an area of 250 cm ² . The coated plates were naturally dried at about 25 ° C for 0.5 h. L *, a * and b * Bio-skin plates were measured before and after sample coating with a CM2600d portable spectrophotometer (MINOLTA Co. Ltd., Japan) in 6 points. ΔL *, Δa *, Δb * mean the change in whiteness, redness, yellowness after coating the sample compared to the color before coating, respectively. E is a summary measure of color increase and is calculated using the formula:

ΔΕ - at Δί ² -I- La ² + LL ²

Data on the L&W index are shown in Table 2.

table 2

Examples of L&W Index A 0.15% V -32.28% 1 27.61% WITH -52.58% 2 -2.76% D 19.44%

The data in Table 2 show that the composition according to the invention (Exp-1) with turbostratic boron nitride and the claimed polymer demonstrates a significantly higher appearance smoothing efficiency compared to a composition in which only one of these ingredients is included (Examples A and B) ... Graphite boron nitride (Example 2) exhibits a lower L&W index than turbostratic boron nitride (Example 1) and a combination of turbostratic boron nitride and silicone elastomer (Example D), thus outside the scope of the invention.

In addition, efficiency was improved by using turbostratic boron nitride as compared to graphite boron nitride (Example 1 versus Example 2).

Moreover, efficiency was improved when turbostratic boron nitride was combined with a non-silicone polyolefin particle (Example 1) compared to a combination with a silicone-based polymer particle (Example D).

Color effect data are shown in Table 3.

Table 3

Sample AL * La * L * LE 1 5.15 ± 0.464 -3.74 ± 0.328 -8.93 ± 0.747 10.96 D 4.22 ± 0.154 -3.11 ± 0.071 -7.52 ± 0.173 9.16

The data in Table 3 show that the composition according to the invention (Example 1) with turbostratic boron nitride and the claimed polymer provides greater brightness, less redness and yellowness compared to the composition with turbostratic boron nitride and a silicone-based polymer particle (Example D), as essential for lightening the skin.

Example 1, A, E-H: Compositions in which polyolefin particles are used outside the stated range of sizes.

Compositions were prepared as shown in Table 4. Compositions 1 and A are repeated here for comparison.

- 8 038652

Table 4

Ingredient (active compound, wt%) Examples of 1 A E F G N Water Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Up to 100 Softtouch * CC6097 3.00 3.00 - 3.00 - 3.00 Optitouch 1.00 - - - - - EA-209 - - 1.00 1.00 - - CL2080 - - - - 1.00 1.00 Tween 20 2 2 2 2 2 2 Glycerol 2 2 2 2 2 2 VP / VA copolymer 2.5 2.5 2.5 2.5 2.5 2.5 Cyclopentasiloxane (D5) 12 12 12 12 12 12 Simulgel EG 3 3 3 3 3 3 Preservative 0.5 0.5 0.5 0.5 0.5 0.5

The L&W index of the various compositions was measured in Table 4, and the values are shown in Table 5.

Table 5

Examples of L&W Index 1 27.61% A 0.15% E -67.02% F 4.95% G -67.91% N -8.13%

The data in Table 5 show that the performance obtained with the composition containing the polyolefin with the stated particle size (Example 1) is superior to the samples prepared with particles outside the stated particle size (Examples F and H).

Claims (12)

CLAIM 1. Composition for personal hygiene containing: a) turbostratic boron nitride particles; b) non-silicone polyolefin particles having an average particle size in the range of 0.5 to 5 microns; and c) a cosmetically acceptable carrier, wherein the non-silicone polyolefin particles comprise homo- or copolymers of a hydrocarbon olefin having from 2 to 10 carbon atoms. 2. The composition of claim 1, wherein the boron nitride has an average particle size in the range of 100 nm to 10 microns. 3. A composition according to claim 1 or 2, in which boron nitride is present in an amount of 0.1 to 15%, preferably 0.4 to 8% by weight of the composition. 4. A composition according to any of the preceding claims, wherein the non-silicone polyolefin particles have an d ₁₀ value of more than 1.1 microns and a d ₉₀ value of less than 3.3 microns. 5. A composition according to any one of the preceding claims, wherein the hydrocarbon olefin does not contain oxygen, silicon or nitrogen atoms. 6. The composition of claim 5, wherein the olefin comprises ethylene, propylene, octene, or combinations thereof. 7. The composition of claim 6, wherein the non-silicone polyolefin particles comprise ethylene / octene copolymer. 8. A composition according to any of the preceding claims, wherein the refractive index of the non-silicone polyolefin particles is in the range of 1.4 to 1.6. 9. A composition according to any one of the preceding claims, wherein the non-silicone polyolefin particles are present in an amount of 0.1 to 10%, preferably 0.1 to 5% by weight of the composition. 10. A composition according to any one of the preceding claims, wherein the cosmetically acceptable carrier comprises an oil-in-water emulsion. 11. A method of improving the appearance of the skin by providing improved smoothing of the appearance and reducing shine, comprising the step of applying a composition according to any of the preceding claims to the surface of the skin. 12. Use of a composition according to any one of claims 1-10 to reduce the appearance of fine lines, wrinkles, pores and / or blemishes, even out skin tone, or a combination of these effects on the skin surface.