US20090324317A1 - Cosmetic products - Google Patents

Cosmetic products Download PDF

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Publication number
US20090324317A1
US20090324317A1 US12/316,964 US31696408A US2009324317A1 US 20090324317 A1 US20090324317 A1 US 20090324317A1 US 31696408 A US31696408 A US 31696408A US 2009324317 A1 US2009324317 A1 US 2009324317A1
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United States
Prior art keywords
cosmetic product
dispenser
product according
visible
light
Prior art date
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Abandoned
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US12/316,964
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English (en)
Inventor
Stephen Norman Batchelor
Jason Richard Williams
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Conopco Inc
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Conopco Inc
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Assigned to CONOPCO, INC. D/B/A UNILEVER reassignment CONOPCO, INC. D/B/A UNILEVER ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BATCHELOR, STEPHEN NORMAN, WILLIAMS, JASON RICHARD
Publication of US20090324317A1 publication Critical patent/US20090324317A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/06—Casings wherein movement of the lipstick or like solid is a screwing movement
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/02—Casings wherein movement of the lipstick or like solid is a sliding movement
    • A45D40/04—Casings wherein movement of the lipstick or like solid is a sliding movement effected by a screw
    • 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
    • A61K8/0216—Solid or semisolid forms
    • A61K8/0229—Sticks
    • 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
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/28—Zirconium; Compounds 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
    • A61K8/30—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
    • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
    • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides 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
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
    • A61K8/4906—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom
    • A61K8/4926—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom having six membered rings
    • 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
    • A61K8/67—Vitamins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q15/00—Anti-perspirants or body deodorants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
    • A61K2800/87—Application Devices; Containers; Packaging

Definitions

  • the present invention relates to cosmetic products particularly to anhydrous cosmetic products and more particularly to products for contact application.
  • Cosmetic products for topical application to human skin comprise a cosmetic composition housed within a dispenser.
  • the choice of dispenser is at the discretion of the producer of the product, and independent of the composition, provided that it satisfies generic considerations.
  • the composition is in the form of firm stick, for dispensing from a stick dispenser, the composition needs to satisfy the generic criteria that it remains solid and integral at both use and storage temperatures.
  • Choices as to shape of the dispenser and any mechanisms for dispensing the stick composition were made on the basis of the dispenser itself and did not take the composition into account.
  • the selection has been made on the basis of the properties of the ingredients themselves and their interaction within the composition without taking into account the dispenser from which they are dispensed.
  • composition and the dispenser together for example in order to overcome or at least ameliorate the instability of one or more ingredients in the composition.
  • the stability of certain ingredients in cosmetic formulations can be improved by control of air ingress.
  • the cosmetics industry has either proposed or adopted several different containers for cosmetic products ranging from a simple tub in which its contents is typically dispensed by extraction of the contents on a finger, through to more complicated dispensers in which the contents is dispensed by an advancing platform/piston/elevator pushing a stick through an opposed opening, coupled with a threaded spindle advancing mechanism.
  • the term “stick” dispenser indicates that the dispenser comprises both a platform and a screw-threaded advance mechanism.
  • the simple tub is simple to seal, whereas the stick dispenser is much more difficult, and especially when the platform itself comprises one or more channels through which the dispenser can be filled through its base.
  • compositions including solid compositions, containing a material that the instant inventors have recognised to be susceptible to UV/photo-destruction during storage, but the text neither recognises that the material suffers from such susceptibility nor identifies a way to improve the storage stability of the compound in compositions containing it when dispensed from a stick dispenser.
  • WO20040219122 discloses polyol in silicone emulsion compositions containing many different ingredients, but does not specify materials that are susceptible to UV/photo-destruction, nor does it contemplate incorporation of such materials in a stick dispenser, but merely an air tight container with no explanation.
  • WO2005055964 discloses on page 21 an antiperspirant composition containing an antiperspirant composition containing an encapsulated fragrance disposed within an unspecified dispenser. There is no disclosure of a material that is susceptible to UV/photo-destruction nor any indication of the nature of the dispenser and accordingly provides no teaching as to whether any dispenser would or would not be capable of improving the storage stability of such a susceptible material.
  • WO20020699924 discloses anhydrous antiperspirant compositions, including stick compositions on page 15, but does not contemplate expressly the presence of materials that are susceptible to UV/photo-destruction.
  • the stick composition is contained in a conventional antiperspirant stick package. Accordingly, the disclosure does not provide any teaching to the reader as to how to select a stick dispenser that would ameliorate or overcome the problem of impaired storage stability of materials susceptible to UV/photo-destruction.
  • U.S. Pat. No. 4,232,977 discloses a dispenser for a stick composition that it alleges comprises a vapour tight seal (column 6, 3 rd paragraph).
  • a vapour tight seal column 6 3 rd paragraph.
  • the seal has to be loose enough to permit rotation of the shaft relative to the dispenser barrel, so that the sealing pressure of the seal is quite low so that several factors contribute to impairing the seal, in practice rather than in theory.
  • EP0462925 relates to sealing a cap, rather than at the base of a stick dispenser and does not contemplate any relationship between the dispenser and UV/photo-sensitive ingredients.
  • EP0070257 discloses a sealing means comprising multiple flanges but there is no disclosure of any relationship with an ingredient that is susceptible to UV/photo destruction and in particular no indication that by appropriate selection of a stick dispenser, it is possible to affect the storage stability of such an ingredient.
  • EP0189521 contemplates a dispenser lacking a screw-threaded advance mechanism and is silent concerning any relationship between the dispenser selection and an ingredient that is susceptible to UV/photo destruction.
  • JP2005-281284 discloses compositions containing palmatine, but provides no direction to the reader as to how to improve its stability during storage.
  • a cosmetic product which is a composition disposed within a dispenser, in which the composition is in the form of a solid anhydrous stick composition containing one or more ingredients that are susceptible to photo-destruction by visible/UV light and/or UV light and the dispenser comprises a barrel having opposed first and second ends, the first end being closed by a cap and the second end comprising a base, a platform intermediate between the first and second ends and screw-threaded means for advancing the platform towards the first end mounted on or adjacent to the second end, the composition being disposed between the platform and the first end of the barrel, in which the dispenser permits a % weight gain after 21 days in a test procedure as defined herein of not greater than 150% of the % weight gain obtained in a reference dispenser.
  • the invention is particularly relevant for the selection of combinations in which the dispenser is bottom filled.
  • the relative weight gain is measured by the test procedure described herein.
  • a method for lengthening the period during which a compound that is susceptible to photo-destruction remains effective in a solid composition which comprises in a first stage identifying its susceptibility to UV or photo-destruction, in a second stage incorporating it into a cosmetic composition, and thereafter introducing the composition into a dispenser comprising a barrel having opposed first and second ends, the first end being closed by a cap and the second end comprising a base, a platform intermediate between the first and second ends and screw-threaded means for advancing the platform towards the first end mounted on or adjacent to the second end, in between the platform and the first end of the barrel, in which the dispenser permits a % weight gain after 21 days in the test procedure as defined herein of not greater than 150% of the % weight gain obtained in the reference dispenser.
  • a cosmetic product according to the first aspect that is an antiperspirant or deodorant product in which the cosmetic active comprises an antiperspirant or deodorant active.
  • the present invention is concerned with stick products displaying improved stability during exposure to ambient air, in visible and UV light, and is especially applicable where the air is humid.
  • Such conditions are prevalent in various rooms of most houses in which cosmetic products are commonly stored, such as in or adjacent to a bathroom or shower-room or in the vicinity of wash hand basins, for example in order to facilitate bodily application of such products shortly after cleansing.
  • the cosmetic composition contains an active ingredient that suffers from photo-destruction, the effectiveness of that ingredient is progressively impaired with the passage of time unless measures are taken to retard, ideally to zero, the rate at which the ingredient is destroyed.
  • the instant invention is of particular applicability to counter degradation of ingredients which is caused or accelerated by water, such as is present in humid air.
  • the present invention is of relevance to a cosmetic composition which contains an ingredient that is affected adversely by storage of such a product until it is consumed, which can commonly last for up to several months.
  • Visible and UV light herein is considered to comprise light having a wavelength of from 290 to 740 nm and particularly up to 700 nm. Accordingly, the invention is especially applicable in regard to products that may be exposed to sunlight, since it comprises light across the full spectrum from 290 to 740 nm and particularly up to 700 nm, albeit possibly of reduced intensity across a fraction of the spectrum where that sunlight has passed through glass, such as through a glass window.
  • the invention broadly contemplates two mechanisms in which visible/UV light such as particularly sunlight can cause destruction of compounds.
  • One mechanism comprises direct absorption of light by the compound in question, leading to its excitation and reaction in that excited state.
  • many destructive reactions can be classified as one or other of hydrogen abstraction, internal rearrangement or electron transfer reactions. Of these reactions, the most common is the classification of electron transfer.
  • a second mechanism can be classified as sensitized destruction which proceeds as in the first mechanism by a compound being promoted to an excited state by absorption of light, but thereafter, the excited state is transformed into a reactive intermediate which reacts with a complementary compound.
  • the two most commonly formed intermediates are free radicals and singlet oxygen.
  • Photolabile a substance which when dissolved in a solvent and exposed to simulated Florida sunlight degrades by more than 50 mol %.
  • the dissolved substance should be exposed to 13860 kJ/m 2 in the range 300-800 nm of simulated Florida sunlight produced by a Xenon arc lamp in a “weatherometer”.
  • a suitable weatherometer for such tests is an Atlas Ci3000+ Weatherometer.
  • Degradation of the substance may be monitored by UV-VIS spectroscopy or by chromatographic extraction and quantification of the substance.
  • Examples of such substances include chlorophyll, coumarin, porphyrins, porphins, myoglobin, riboflavin, bilirubin, and methylene blue, xanthene based dyes.
  • Molecules comprising aromatic heterocycles, and particularly when the heteroatom is charged.
  • Desirable examples include palmatine or malvidin chloride.
  • Other counter-ions can be employed if desired.
  • Phenols which lack a tertiary butyl group that would serve to stabilise the phenol, adjacent to the OH group.
  • the phenols are preferably polyphenols, such as catechin epicatechin, epicatechin gallate, epigallocatechin gallate resorcinol, gallic acid, isolquiritin
  • Vitamins such as vitamin C, vitamin B3 and/or derivatives thereof, Co-enzymes, Enzymes and proteins
  • Such compounds are contemplated for incorporation into cosmetic products on account of their beneficial properties.
  • various of them, such as dyes can colour the composition rendering it attractive to a consumer.
  • C18 unsaturated carboxylic acids can combat irritation on skin induced by co-ingredients.
  • Still others can improve or disguise the appearance of hair on skin, such as by retarding its growth, either shorter and/or finer.
  • a mixture of two or more such substances from classes (1) to (5) can be employed together, selected from within a class or from different classes.
  • An ingredient is considered to be adversely affected if the rate of impairment of a desired property is accelerated or the extent of impairment increased by storage in daylight in ambient air compared with storage in the dark in air of zero percent relative humidity.
  • Many such ingredients are expressly recognised from their data sheets to be susceptible to photo-destruction, by reference to their extinction coefficient having a peak value within the visible/UV light spectrum of at least 100 mol ⁇ 1 cm ⁇ 1 , particularly at least 500 mol ⁇ 1 cm ⁇ 1 and especially at least 1000 mol ⁇ 1 cm ⁇ 1 .
  • the concentration of the ingredient susceptible to photo-destruction is normally at least 0.0001% w/w of the composition, in many embodiments at least 0.0005% w/w and in some preferred embodiments, at least 0.001%. Said ingredient is commonly present at a concentration not exceeding 10% w/w, and often not higher than 5% w/w of the composition. In a number of highly desirable compositions, for example those containing a susceptible ingredient affording skin care or hair minimisation benefit, the ingredient is present at a concentration of up to 1% w/w.
  • an astringent antiperspirant active such as salts described hereinafter, is considered not to be an ingredient affected adversely by such storage.
  • Products herein comprise an anhydrous composition, by which is meant that the composition is free from detectable free water. Free water excludes water of hydration.
  • the reference and the trial dispensers are each filled with approximately a 50 g sample of the stick composition specified hereinbelow, with the stick “former” removed if the dispenser has been bottom filled, and a close-fitting cap is fitted over the open end.
  • Bottom filling means that the stick composition is filled into the dispenser through an aperture at the base of the dispenser and through one or more passages in the platform, the composition being retained in the dispenser barrel between the platform and the first end of the barrel.
  • dispensers which include the reference dispenser, the mechanism for platform advancement is mounted on the barrel, and any seal fitting in or covering a filling aperture.
  • the sample and reference dispenser are filled such that the stick material occupies the entire volume between the platform and the open end of the barrel.
  • any variation in the relative humidity within the chamber remains within the range of at least 90% RH, and any such absolute variations apply to both sample and reference products simultaneously, the comparison using the same defined composition, so that the relative weight gain is not affected.
  • the dispensers are weighed and replaced in the chamber, the difference in weight being measured.
  • the weight increase comparison is made after 21 days, namely on the 22 nd day of the test.
  • the weighing on the 22 nd day should take place at substantially the same time of day as the initial weighing.
  • the data is collected on at least 5 dispensers for each of the reference and sample dispensers, and averaged.
  • the trial is conducted using dispensers that have not been filled previously.
  • the test preferably employs the same weight, about 45 g of the reference stick material in each dispenser.
  • the reference dispenser is a nominal 1.6 oz dispenser that accommodates about 45 g material.
  • the reference dispenser is bottom filled through a central opening within the rotor wheel mounted through a central aperture in the base of the dispenser barrel and thence though passageways in the platform.
  • the platform is skeletal.
  • the dispenser comprises essentially two orthogonal seals sealing the rotor wheel into the aperture at the base of the barrel.
  • the average weight gain should be converted to an average gain per 100 g of stick material.
  • Such reference dispensers constitute the primary reference dispenser. If, as may happen eventually, a supply of the primary reference dispenser is exhausted, then a secondary reference dispenser can be supplied instead, namely one that has been referenced to the primary reference dispenser, together with the conversion factor to determine whether or not the invention test is met. Thus, if the secondary reference dispenser permits a weight increase that is “x” times the weight increase of the primary reference dispenser, then the appropriate ceiling ratio to determine whether or not a sample dispenser satisfies the instant invention is 1.5/x . Such conversion factor shall be supplied together with the secondary reference dispenser.
  • the stick composition for conducting the above assessment of the suitability of a dispenser is as follows:—
  • the product according to the present invention comprises at least one cosmetic active ingredient, for example one or more that can impart colour, such as a pigment, inhibit body odour generation, inhibit perspiration, impart moisturisation, combat ageing of skin, condition skin or hair, protect skin against exposure to sunshine and/or ameliorate sunburn or repel insects.
  • colour such as a pigment
  • inhibit body odour generation inhibit perspiration
  • impart moisturisation impart moisturisation, combat ageing of skin, condition skin or hair, protect skin against exposure to sunshine and/or ameliorate sunburn or repel insects.
  • the invention product especially convenient comprises an antiperspirant or deodorant active.
  • Antiperspirant actives for use herein are often selected from astringent active salts, including in particular astringent aluminium, zirconium and mixed aluminium/zirconium salts, including both inorganic salts, salts with organic anions and complexes.
  • Preferred astringent salts include aluminium, zirconium and aluminium/zirconium halohydrate salts, and especially chlorohydrates. Aluminium/zirconium chlorohydrates complexed with glycine are particularly desirable antiperspirant actives in stick compositions herein.
  • Aluminium chlorohydrates comprise a mixture of polymeric species, for example species containing respectively 12, 24 or 36 aluminium atoms and the relative ratio of the various species is controlled by the manufacture process. It is desirable to include a high proportion of Al 24 species, such as products obtained following the teaching in EP-A-6739, sometimes called activated aluminium chlorohydrates.
  • Zirconium actives can usually be represented by the empirical general formula: ZrO(OH) 2n-nz B z .wH 2 O in which z is a variable in the range of from 0.9 to 2.0 so that the value 2n-nz is zero or positive, n is the valency of B, and B is selected from the group consisting of chloride, other halide, sulphamate, sulphate and mixtures thereof. Possible hydration to a variable extent is represented by wH 2 O. Preferable is that B represents chloride and the variable z lies in the range from 1.5 to 1.87. In practice, such zirconium salts are usually not employed by themselves, but as a component of a combined aluminium and zirconium-based antiperspirant.
  • zirconium salts may have coordinated and/or bound water in various quantities and/or may be present as polymeric species, mixtures or complexes.
  • zirconium hydroxy salts often represent a range of salts having various amounts of the hydroxy group.
  • Zirconium aluminium chlorohydrates may be particularly preferred.
  • Antiperspirant complexes based on the above-mentioned astringent aluminium and/or zirconium salts can be employed.
  • the complex often employs a compound with a carboxylate group, and advantageously this is an amino acid.
  • suitable amino acids include dl-tryptophan, dl- ⁇ -phenylalanine, dl-valine, dl-methionine and ⁇ -alanine, and preferably glycine which has the formula CH 2 (NH 2 )COOH. It is highly desirable to employ glycine complexes of a combination of aluminium halohydrates and zirconium chlorohydrates together with amino acids such as glycine.
  • antiperspirant salts have an Al/Zr ratio in a range from 2 to 10, especially 2 to 6, a metal to Cl ratio from 2.1 to 0.9:1 and a variable amount of glycine.
  • the metal:Cl ratio is from 0.9:1 to 1.25:1 and in others it is from 1.3:1 to 1.45:1.
  • actives which may be utilised include astringent titanium salts, for example those described in GB 2299506A.
  • the proportion of solid antiperspirant salt in a suspension composition normally includes the weight of any water of hydration and any complexing agent that may also be present in the solid active.
  • the antiperspirant salt in an anhydrous stick composition is particulate, commonly having particles mainly with a diameter within the range of 0.1 to 200 ⁇ m, such as providing a mean particle size in the range of from 3 to 20 ⁇ m.
  • the particulate antiperspirant active may be present in the form of hollow spheres or/and non-hollow particles at the discretion of the manufacturer of the invention antiperspirant product.
  • Non-hollow particles can be made, if desired, by crushing hollow particles.
  • the antiperspirant particles it is preferable for the antiperspirant particles to be substantially free from hollows, such as greater than 90% by weight of the particles and especially greater than 95% by weight.
  • Suitable deodorant actives can comprise deodorant effective concentrations of antiperspirant metal salts, deoperfumes, and/or microbicides, including particularly bactericides, such as chlorinated aromatics, including biguanide derivatives, of which triclosan (eg Irgasan DP300 or Triclorban), and chlorhexidine warrant specific mention.
  • bactericides such as chlorinated aromatics, including biguanide derivatives, of which triclosan (eg Irgasan DP300 or Triclorban), and chlorhexidine warrant specific mention.
  • Another class of effective deodorants comprises polyaminopropyl biguanide salts such as are available under the trade mark Cosmosil. Such materials commonly act as bactericides.
  • a still further class of materials that can inhibit malodour formation comprise chelators that can sequester iron, and thereby retard bacterial growth, including aminopolycarboxylates such as EDTA or higher homologues such as DTPA.
  • Deodorant actives other than astringent metal antiperspirant salts are commonly employed at a concentration of from 0.1 to 5% by weight, and particularly 0.1 to 2% by weight.
  • compositions herein commonly comprise one or more carrier liquids, which are water-immiscible and thus sometimes are referred to as oils.
  • the liquids often constitute from 30 to 90% by weight of the composition and in many desirable compositions at least 40% and particularly at least 50% by weight. Their total weight proportion is often not greater than 80% and in many practical embodiments of the invention is up to 70%.
  • the carrier liquids often include silicone oils, which may be volatile or non volatile or a mixture of both and commonly also or alternatively comprise non-silicone oils.
  • the hydrophobic carrier liquids include a volatile liquid silicone, i.e. liquid polyorganosiloxane.
  • a volatile liquid silicone i.e. liquid polyorganosiloxane.
  • such material should have a measurable vapour pressure at 20 or 25° C.
  • the vapour pressure of a volatile silicone lies in a range from 1 or 10 Pa to 2 kPa at 25° C.
  • a volatile silicone because it can give a “drier” feel to the applied film after the composition is applied to skin, for example constituting at least 25% and particularly at least 40% by weight of the carrier liquids.
  • Volatile polyorganosiloxanes can be linear or cyclic or mixtures thereof.
  • Preferred cyclic siloxanes include polydimethylsiloxanes and particularly those containing from 3 to 9 silicon atoms and preferably not more than 7 silicon atoms and most preferably from 4 to 6 silicon atoms, otherwise often referred to as cyclomethicones.
  • Preferred linear siloxanes include polydimethylsiloxanes containing from 3 to 9 silicon atoms.
  • the volatile siloxanes normally by themselves exhibit viscosities of below 10 ⁇ 5 m 2 /sec (10 centistokes), and particularly above 10 ⁇ 7 m 2 /sec (0.1 centistokes), the linear siloxanes normally exhibiting a viscosity of below 5 ⁇ 10 ⁇ 6 m 2 /sec (5 centistokes).
  • the volatile silicones can also comprise branched linear or cyclic siloxanes such as the aforementioned linear or cyclic siloxanes substituted by one or more pendant -0-Si(CH 3 ) 3 groups.
  • Examples of commercially available silicone oils include oils having grade designations 344, 345, 244, 245 and 246 from Dow Corning Corporation; Silicone 7207TM and Silicone 7158TM from Union Carbide Corporation; and SF1202TM from General Electric.
  • the hydrophobic carrier employed in compositions herein can alternatively or additionally comprise non-volatile silicone oils, which include polyalkyl siloxanes, polyalkylaryl siloxanes and polyethersiloxane copolymers. These can suitably be selected from dimethicone and dimethicone copolyols.
  • non-volatile silicone oils include products available under the trademarks Dow Corning 556 and Dow Corning 200 series.
  • Other non volatile silicone oils include that bearing the trademark DC704. Incorporation of at least some non-volatile silicone oil having a high refractive index such as of above 1.5, for example in a proportion of at least 10% by weight of the silicone oils can be beneficial in some compositions.
  • Suitable hydrophobic carriers comprise liquid aliphatic or aromatic esters.
  • Suitable aliphatic esters contain at least one long chain alkyl group, such as esters derived from C 1 to C 20 alkanols esterified with a CB to C 22 alkanoic acid or C 6 to C 10 alkanedioic acid.
  • the alkanol and acid moieties or mixtures thereof are preferably selected such that they each have a melting point of below 20° C.
  • These esters include isopropyl myristate, lauryl myristate, isopropyl palmitate, diisopropyl sebacate and diisopropyl adipate.
  • Suitable liquid aromatic esters include fatty alkyl benzoates.
  • fatty alkyl benzoates include suitable C 8 to C 18 alkyl benzoates or mixtures thereof, including in particular C 12 to C 15 alkyl benzoates eg those available under the trademark Finsolv.
  • Ester oils be they aliphatic or aromatic desirably comprise from 0 to 50% w/w, eg 5 to 40% w/w of the oils.
  • ester oils which desirably provide up to 10% w/w of the carrier liquids or alternatively from 1 to 6% w/w of the composition comprise triglyceride oils, such as those extractable from plants derivable from unsaturated carboxylic acids, such as C16, C18 and/or C20.
  • triglyceride oils include caster oil, borage oil, coriander seed oil, safflower oil and sunflower seed oil.
  • suitable hydrophobic carriers comprise liquid aliphatic ethers derived from at least one fatty alcohol, such as myristyl ether derivatives e.g. PPG-3 myristyl ether or lower alkyl ethers of polygylcols such as an ether having named as PPG-14 butyl ether by the CTFA.
  • myristyl ether derivatives e.g. PPG-3 myristyl ether or lower alkyl ethers of polygylcols
  • PPG-14 butyl ether by the CTFA.
  • Such ethers desirably constitute from 0 to 20, and preferably from 0 to 10% w/w of the oils.
  • oils which can beneficially be included comprise hydrophobic aliphatic alcohols which are liquid at 20° C. and have a boiling point of above 100°. Such oils are preferably employed in a proportion of from 0 to 50% w/w of the carrier liquids, and are of especial benefit for use in conjunction with amido gellants, when they are preferably employed within the proportion of from 25 to 50% w/w of the carrier oils.
  • Especially desirable hydrophobic aliphatic alcohols are branched chain alcohols of at least 15 carbon atoms up to 30 and especially up to 25, including isostearyl alcohol, hexyl-decanol octyl-dodecanol and decyl-tetradecanol.
  • Other suitable water-immiscible alcohols include intermediate chain length linear alcohols, commonly containing from 9 to 13 carbon atoms, such as decanol or dodecanol.
  • a further suitable alcohol is benzyl alcohol.
  • Stick compositions herein normally comprise a structurant or gellant for the carrier liquid.
  • waxes One class of structurant which is desirable by virtue of its long standing proven capability to produce firm solids (sticks) comprises waxes.
  • wax is employed to encompass not only materials of natural origin that are solid with a waxy feel and water-insoluble at 30-40° C., but melt at a somewhat higher temperature, typically between 60 and 95° C., such as beeswax, candelilla or carnauba wax and their synthetic derivatives or analogues for example those available from Koster Keunen under the marks K62, K67, or K82, but also materials having similar waxy properties.
  • Such other waxes include hydrocarbon waxes, eg paraffin wax, mineral wax and microcrystalline wax; synthetic waxes, such as polyethylene waxes of 300 to 600 daltons; waxy derivatives or waxy components of natural waxes, such as ester components, either extracted or synthesised, solid ester derivatives of glycerol or glycol, typically with linear saturated fatty acids, usually containing a significant fraction of C 16-22 acid residues, which may be synthesised or obtained by hydrogenating the corresponding natural oil, such as caster wax; petroleum waxes, waxy silicone polymers containing alkyl substituents of at least C 10 chain length; and, importantly, waxy fatty alcohols, that normally are linear and often contain from 14 to 24 carbons, such as stearyl alcohol, cetyl alcohol and/or behenyl alcohol.
  • hydrocarbon waxes eg paraffin wax, mineral wax and microcrystalline wax
  • synthetic waxes such as polyethylene waxes of 300 to 600 daltons
  • Waxes are commonly employed at an amount of at least 12% by weight of the carrier oils, such as in the range of from 15 to 40% w/w and in many instances from 20 to 35% w/w.
  • the wax or mixture of waxes often constitute from 12 to 24% w/w of the composition, and in many compositions from 14 to 20% w/w.
  • amide-containing fibre-forming structurants examples include 1,2- or 1,3-bisalkylamido cyclohexanes as described in U.S. Pat. No. 6,410,003, hydroxystearic acid amides described in U.S. Pat. No. 5,840,286, alkylamide derivatives of succinic or citric acid described in U.S. Pat. No.
  • compositions are commonly contemplated in a w/w amount of from 1 to 20% of the oil blend, and in many favourable compositions from 3 to 10% of the oil blend. Expressed in terms of the entire composition, the amount of such structurants is often from 3 to 7% w/w of the composition.
  • Solid compositions herein can comprise, if desired, one or more humectants, preferably comprising at least 2 hydroxyl substituents.
  • Preferred humectants comprise glycerol and PEG (polyethylene glycol) having an average molecular weight of from 200 to 620.
  • Such a humectant can desirably be employed at a concentration of at least 0.25% w/w and particularly at least 0.5% w/w of the composition.
  • the humectant is preferably present at a concentration of up to 10% w/w, in many instances up to 8% w/w, and often advantageously from 1 to 4% w/w of the composition.
  • the humectant can advantageously be incorporated in the stick compositions herein together with a triglyceride oil, particularly derived from unsaturated C 1-8 aliphatic acids.
  • the weight ratio of these two constituents is desirably in the range of from 4:1 to 1:4, for example providing a combined weight of from 1.5 to 6% w/w of the composition.
  • the solid compositions herein can if desired comprise one or more minor ingredients that can be contemplated in cosmetic compositions.
  • Such ingredients normally comprise in total not more than 10% by weight of the composition.
  • Such optional constituents can comprise sensory modifiers, such as talc or finely divided polyethylene, such as in an amount of up to 5% by weight; fragrance, including, if desired deoperfumes, often in an amount of up to 4%, eg 0.3 to 2% by weight, colorants; skin cooling agents such as menthol; wash-off agents such as non-ionic surfactants.
  • solid cosmetic compositions contemplated herein and containing an ingredient that is susceptible to photo-degradation can be made by methods hitherto contemplated for similar compositions from which the photodegradable ingredient is absent.
  • a blend of oils is formed and heated to a temperature which is high enough to dissolve the structurant therein.
  • This temperature is commonly in the range of from 70 to 95° C. when employing a wax, and commonly in the range of 70 to 140° C. when employing a polymer or fibre-forming structurant (classes 2 and 3, supra).
  • the precise temperature to be attained depends on the structurant itself.
  • the composition is often allowed to cool to a temperature below the structurant dissolution temperature, but above the composition solidification temperature and the antiperspirant and the photo-degradable ingredient and other and optional ingredients introduced with agitation to prevent settling.
  • the fragrance is often the last material to be introduced.
  • the resultant mixture is introduced into the dispenser whilst it is still mobile, for example at a temperature of at least 3° C. above its normal solidification temperature if filling takes place under gravity, or within +/ ⁇ 2° C. of that temperature if it is injected under external pressure.
  • the dispenser for the invention product can be selected in accordance with the test procedure identified above.
  • the primary reference dispenser itself is a particularly suitable dispenser for the present invention, because it controls extremely well the inflow of ambient air into its interior through its base. Ambient air, as mentioned hereinbefore, will be particularly humid in locations such as bath or shower rooms or adjacent to washing facilities. However, in tropical or sub-tropical climes, the air is naturally humid, often exceeding relative humidity of 70%. Even humidities prevalent in temperate climates such as 40 to 50% can be considered moist.
  • the top of solid cosmetic dispensers are commonly equipped with their tightly fitting cap, often a friction fit, but the base of dispensers can offer a passage for air ingress, for example between the base itself and the mounting for the rotor.
  • the reference dispenser and particularly if it is a bottom-filled dispenser, employs for at least one of its seals, a claw seal.
  • This is an especially effective seal for preventing air ingress, by virtue of its tip flexibility.
  • test procedure identified herein is particularly suitable for identifying and selecting those bottom-fill stick dispensers which are preferable for incorporating compositions containing an ingredient that is sensitive to photo-degradation.
  • the test procedure can identify suitable dispensers in which the area of exposed passage at the lower side of the platform constitutes at least 30%, often at least 50% and particularly at least 60% of the transverse surface area of the dispenser barrel within which the platform fits, such as up to 90% of the transverse surface area, and in many practical embodiments up to 85% of the transverse surface area.
  • the central threaded interior aperture of the hub of the platform is excluded.
  • composition summarised below was made by the following general method:
  • a blend of the oils formed with stirring in a pot was slowly heated to a temperature in the region of 80 to 85° C.
  • the solid structurants were introduced slowly with stirring until by eye the structurants were not visible as a separate dispersed phase.
  • the mixture was allowed to cool to between 70 and 75° C. and the particulate antiperspirant and other materials were introduced, including an ingredient containing palmatine which is susceptible to photo-degradation, the mixture being stirred to prevent sedimentation.
  • the final ingredient added was the fragrance.
  • the suspension of particulates in an oil phase was allowed to cool further until it was between 5 and 10° C.
  • Palmatine has an extinction coefficient that is highest of about 2700/Mcm at 280 nm, so that for the purpose of this invention, the “peak” extinction coefficient is taken to be at 290 nm.
  • FIG. 1 represents a cross section through the dispenser, viewed along its minor transverse axis
  • FIG. 2 represents a cross section through the dispenser, viewed along its major transverse axis.
  • the dispenser comprised barrel ( 1 ) of oval cross section having a tubular axially extending sidewall ( 2 ) with an open upper end ( 3 ) in which is fitted a stick former ( 4 ) and which is covered by a cap ( 5 ) that friction fits onto the sidewall ( 2 ) and is held by a pair of short ribs and grooves ( 6 ), ( 7 ).
  • Sidewall ( 2 ) has a base wall ( 8 ) having a central circular axial wall ( 9 ) joined to an annular lateral wall section ( 10 ).
  • a full base rotor ( 11 ) sits beneath the barrel ( 1 ) and comprises a peripheral sidewall ( 12 ) and a lateral top wall ( 13 ) and a central tubular axial wall ( 14 ) dimensioned to be pushed partly through the axial circular wall ( 9 ) of the barrel base.
  • Tubular wall ( 14 ) has a lower section forming an aperture plugged by plug ( 15 ) and from its upper section an axial threaded spindle ( 16 ) extends into the body of the barrel ( 1 ). Apertures in the mounting of the spindle ( 16 ) in the tubular wall ( 14 ) permit flow therethrough of stick material when it is in fluid form.
  • the tubular wall ( 14 ) comprises two external surfaces substantially orthogonal to each other ( 17 , 18 ) that are opposed to the inward face of walls ( 9 ) and ( 10 ) respectively. Between the opposed faces of wall ( 9 ) and surface ( 17 ) extends a claw seal ( 19 ) and between wall ( 10 ) and surface ( 18 ) extends a wiper seal ( 20 ).
  • a platform ( 21 ) is located within barrel ( 1 ) between its base wall ( 8 ) and its open end ( 3 ) having a domed top ( 22 ), a plurality of apertures ( 24 ) and a central threaded bore ( 23 ) dimensioned to engage with the threaded spindle ( 16 ).
  • the dispenser is made by push fitting the central wall ( 14 ) of the rotor ( 11 ) through the circular section ( 9 ) of the base and the seals ( 19 ) and ( 20 ) span respectively the spaces between surfaces ( 9 , 17 ) and ( 10 , 18 ).
  • the platform ( 21 ) is fitted through open end ( 3 ) and the rotor ( 11 ) rotated to wind the platform down until it encounters the barrel base.
  • the former ( 3 ) is push fitted and the dispenser is inverted.
  • the barrel ( 1 ) is filled with stick material (not illustrated) through the apertures in the circular wall ( 14 ) and apertures ( 24 ) in the platform ( 21 ). When the stick material has solidified, the dispenser is turned upright and the cap fitted.
  • the dispensers were removed from the enclosures periodically and visually assessed, cap and former being replaced quickly after each observation.
  • the visual change of the stick composition in the reference, acceptable, dispenser was compared with that observed in a dispenser that had a weight gain of 0.1846 g after 21 days, i.e. a weight gain of 261% of the gain in the reference ⁇ dispenser.
  • the stick material was the same pale beige white in appearance.
  • the stick composition in the reference dispenser was still pale beige white, whereas in the comparison dispenser the composition had darkened to beige.
  • the stick composition in the reference dispenser did eventually darken to beige and observed after 16 days. This shows that the reference dispenser significantly retarded the rate at which the ingredient susceptible to photo-destruction was deleteriously affected and hence the reference dispenser is a suitable dispenser in accordance with the instant invention.

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US12/316,964 2007-12-20 2008-12-18 Cosmetic products Abandoned US20090324317A1 (en)

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US9795206B2 (en) 2014-12-22 2017-10-24 The Procter & Gamble Company Package for consumer care products
US9820551B2 (en) 2014-12-22 2017-11-21 The Procter & Gamble Company Package for consumer care products
US9867445B2 (en) 2014-12-22 2018-01-16 The Procter & Gamble Company Package for consumer care products
US10517373B2 (en) 2014-12-22 2019-12-31 The Procter & Gamble Company Package for consumer care products
US11325766B2 (en) * 2019-08-30 2022-05-10 Yuyao Caiyun Cosmetics Packaging Co. Ltd. Rotary bottle with replaceable inner container
WO2022122884A1 (fr) 2020-12-11 2022-06-16 Unilever Ip Holdings B.V. Composition antitranspirante
US11382400B2 (en) 2018-08-10 2022-07-12 Go Products Co. Material applicator

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Publication number Priority date Publication date Assignee Title
US9795206B2 (en) 2014-12-22 2017-10-24 The Procter & Gamble Company Package for consumer care products
US9820551B2 (en) 2014-12-22 2017-11-21 The Procter & Gamble Company Package for consumer care products
US9867445B2 (en) 2014-12-22 2018-01-16 The Procter & Gamble Company Package for consumer care products
US10517373B2 (en) 2014-12-22 2019-12-31 The Procter & Gamble Company Package for consumer care products
US11382400B2 (en) 2018-08-10 2022-07-12 Go Products Co. Material applicator
US11325766B2 (en) * 2019-08-30 2022-05-10 Yuyao Caiyun Cosmetics Packaging Co. Ltd. Rotary bottle with replaceable inner container
WO2022122884A1 (fr) 2020-12-11 2022-06-16 Unilever Ip Holdings B.V. Composition antitranspirante

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GB2455897A (en) 2009-07-01
CA2709349A1 (fr) 2009-07-02
EP2071976A3 (fr) 2009-07-22
GB0822839D0 (en) 2009-01-21
WO2009080624A1 (fr) 2009-07-02
GB2455897B (en) 2012-07-18

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