WO1993008791A1 - Depilatory compositions - Google Patents
Depilatory compositions Download PDFInfo
- Publication number
- WO1993008791A1 WO1993008791A1 PCT/EP1992/002494 EP9202494W WO9308791A1 WO 1993008791 A1 WO1993008791 A1 WO 1993008791A1 EP 9202494 W EP9202494 W EP 9202494W WO 9308791 A1 WO9308791 A1 WO 9308791A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- depilatory
- composition
- depilatory composition
- clay
- compound
- Prior art date
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- 230000002951 depilatory effect Effects 0.000 title claims abstract description 61
- 239000000203 mixture Substances 0.000 title claims abstract description 53
- 239000004927 clay Substances 0.000 claims abstract description 24
- 229910021647 smectite Inorganic materials 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 13
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 9
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 9
- 239000000440 bentonite Substances 0.000 claims abstract description 6
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000003512 tertiary amines Chemical class 0.000 claims abstract description 6
- 239000006071 cream Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 7
- 229910003439 heavy metal oxide Inorganic materials 0.000 claims description 7
- 125000001931 aliphatic group Chemical group 0.000 claims description 6
- -1 alkaline earth metal salt Chemical class 0.000 claims description 6
- VFLWKHBYVIUAMP-UHFFFAOYSA-N n-methyl-n-octadecyloctadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCN(C)CCCCCCCCCCCCCCCCCC VFLWKHBYVIUAMP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000443 aerosol Substances 0.000 claims description 5
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 5
- 239000006210 lotion Substances 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- CNYFJCCVJNARLE-UHFFFAOYSA-L calcium;2-sulfanylacetic acid;2-sulfidoacetate Chemical compound [Ca+2].[O-]C(=O)CS.[O-]C(=O)CS CNYFJCCVJNARLE-UHFFFAOYSA-L 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 claims description 2
- 229910000271 hectorite Inorganic materials 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N monoethyl amine Natural products CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 claims 1
- HYTYHTSMCRDHIM-UHFFFAOYSA-M potassium;2-sulfanylacetate Chemical compound [K+].[O-]C(=O)CS HYTYHTSMCRDHIM-UHFFFAOYSA-M 0.000 abstract description 8
- 125000004429 atom Chemical group 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229910052570 clay Inorganic materials 0.000 description 15
- 210000004209 hair Anatomy 0.000 description 13
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 11
- 239000002304 perfume Substances 0.000 description 7
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 6
- 239000000920 calcium hydroxide Substances 0.000 description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 229960000541 cetyl alcohol Drugs 0.000 description 4
- 229940057995 liquid paraffin Drugs 0.000 description 4
- NEMFQSKAPLGFIP-UHFFFAOYSA-N magnesiosodium Chemical compound [Na].[Mg] NEMFQSKAPLGFIP-UHFFFAOYSA-N 0.000 description 4
- 239000000391 magnesium silicate Substances 0.000 description 4
- 229910052919 magnesium silicate Inorganic materials 0.000 description 4
- 235000019792 magnesium silicate Nutrition 0.000 description 4
- 229940058015 1,3-butylene glycol Drugs 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004480 active ingredient Substances 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 235000019437 butane-1,3-diol Nutrition 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 150000002430 hydrocarbons Chemical group 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003352 sequestering agent Substances 0.000 description 3
- 235000019795 sodium metasilicate Nutrition 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- FMYOMWCQJXWGEN-UHFFFAOYSA-M sodium;2,3,4,5,6,7-hexahydroxyheptanoate Chemical compound [Na+].OCC(O)C(O)C(O)C(O)C(O)C([O-])=O FMYOMWCQJXWGEN-UHFFFAOYSA-M 0.000 description 3
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 2
- IQXJCCZJOIKIAD-UHFFFAOYSA-N 1-(2-methoxyethoxy)hexadecane Chemical compound CCCCCCCCCCCCCCCCOCCOC IQXJCCZJOIKIAD-UHFFFAOYSA-N 0.000 description 2
- HNUQMTZUNUBOLQ-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-[2-(2-octadecoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol Chemical compound CCCCCCCCCCCCCCCCCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO HNUQMTZUNUBOLQ-UHFFFAOYSA-N 0.000 description 2
- 239000004322 Butylated hydroxytoluene Substances 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- 229910017356 Fe2C Inorganic materials 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 2
- 229940095259 butylated hydroxytoluene Drugs 0.000 description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 2
- HDFRDWFLWVCOGP-UHFFFAOYSA-N carbonothioic O,S-acid Chemical compound OC(S)=O HDFRDWFLWVCOGP-UHFFFAOYSA-N 0.000 description 2
- 229950009789 cetomacrogol 1000 Drugs 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- XUJNEKJLAYXESH-UHFFFAOYSA-N cysteine Natural products SCC(N)C(O)=O XUJNEKJLAYXESH-UHFFFAOYSA-N 0.000 description 2
- 235000018417 cysteine Nutrition 0.000 description 2
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 2
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 150000002191 fatty alcohols Chemical class 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229940094522 laponite Drugs 0.000 description 2
- XCOBTUNSZUJCDH-UHFFFAOYSA-B lithium magnesium sodium silicate Chemical compound [Li+].[Li+].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3 XCOBTUNSZUJCDH-UHFFFAOYSA-B 0.000 description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229960003330 pentetic acid Drugs 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003974 emollient agent Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- XXUJMEYKYHETBZ-UHFFFAOYSA-N ethyl 4-nitrophenyl ethylphosphonate Chemical compound CCOP(=O)(CC)OC1=CC=C([N+]([O-])=O)C=C1 XXUJMEYKYHETBZ-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000003806 hair structure Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000003906 humectant Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000010497 wheat germ oil Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q9/00—Preparations for removing hair or for aiding hair removal
- A61Q9/04—Depilatories
-
- 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
- A61K8/26—Aluminium; 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
- A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
Definitions
- This invention relates to compositions useful for removing unwanted hair from the body.
- depilatory compositions usually in the form of a cream or a lotion, are applied to the skin of the body at an appropriate place and after 5 to 15 minutes the cream is removed by means of a spatula, cotton wool, sponge or some other suitable material which is wiped over the skin.
- the active .ingredient of such depilatory compositions is usually an alkali or alkaline earth metal salt of an alpha or beta mercaptocarboxylic acid, e.g. potassium or calcium thioglycolate.
- Such ingredients are associated with an unpleasant smell which is difficult to mask.
- the active ingredient penetrates the hair and destroys the cysteine bonds between the hair molecules thus weakening the hair to such an extent that merely scraping or wiping the cream off the skin breaks the hair at skin level and thus removes it.
- the cream has to be used at a pH of 12 to 12.5 so that the active ingredient e.g. potassium thioglycolate can penetrate the hair and thus weaken the hair structure.
- High pH products are potentially irritant and may reduce the condition of the treated skin.
- the skin has a self-regulating system which restores the pH to the normal range of 5 to 7, usually 5.5 plus or minus 0.5 and any hair which is just below the surface of the skin which has been attacked by the active ingredient will then revert to its normal structure and strength as the cysteine bonds are reformed.
- a depilatory composition comprising an effective amount of a depilatory compound and one or more smectite or kaolin clay, said composition having a pH of between about 11.5 and about 12.7.
- said composition has a pH of between about 12 and about 12.5.
- Suitable clays include smectite clays, for example bentonite, montmorillonite and hectorite; or china (kaolin) clays .
- Bentonite clays are preferred, for example bentonite clays available commercially e.g. under the trade names Gelwhite L, Gelwhite HNF and Westone supplied by English China Clays.
- the clay may be incorporated into the depilatory composition at a concentration of, for example 1 to 10% by weight, preferably 2 to 10%, more preferably 5% by weight of the depilatory composition.
- Heavy metals particularly iron ions are known to reduce the efficacy of depilatory compounds and are cosmetically unacceptable.
- the term 'heavy metal' as used herein denotes a metal with an atomic number greater than or equal to that of scandium, but excluding any group I or group II metals.
- the clays used in the depilatory composition have a low content of heavy metals, particularly a low content of heavy metal oxide or oxides, especially less than 1% w/w of heavy metal oxide or oxides.
- the clays comprise a low content of iron oxide and especially a low content of iron oxide in a form soluble in water.
- the clays may contain less than 1% w/w of Fe2C>3, preferably less than 0.8% w/w of
- Fe 2°3' more preferably less than 0.3% w/w of Fe2C> .
- the depilatory compound may be, for example, an alkali or alkaline earth metal salt of an alpha or beta mercaptocarboxylic acid, preferably potassium or calcium thioglycolate. Varying quantities of the depilatory compound may be used for example between 3% and 10% w/w.
- compositions of the present invention may take the form of any of the known depilatory compositions, for example creams, lotions or aerosols and may be prepared using conventional methods known in the art.
- compositions according to the invention may contain other components which will be well known to those skilled in the art, for example emollients such as cetyl alcohol, liquid paraffin or white soft paraffin, humectants such as urea or 1,3- butylene glycol, emulsifying agents such as ethoxylated cetyl or stearyl alcohol, antioxidants such as butylated hydroxytoluene, thickeners such as sodium magnesium silicate, seguestrants such as sodium heptonate, stabilisers such as sodium metasilicate, or perfumes.
- emollients such as cetyl alcohol, liquid paraffin or white soft paraffin, humectants such as urea or 1,3- butylene glycol
- emulsifying agents such as ethoxylated cety
- a preferred feature of the present invention provides a depilatory composition which comprises: a) an effective amount of a depilatory compound; b) one or more smectite or kaolin clay; and c) a tertiary amine of general formula I in which R- j _ represents a fatty moiety having 8 to 36 carbon atoms, and R2 and R each independently represent a fatty moiety having 1 to 36 carbon atoms.
- fatty moiety denotes a hydrocarbon moiety which may be derived from a fatty acid.
- the hydrocarbon moiety may be a branched or unbranched aliphatic group, which may be saturated or unsaturated, or an aromatic group and may be optionally substituted for example with one or more hydroxy groups.
- Preferred fatty moieties are alkyl groups having 1 to 4 carbo atoms, for example methyl, or long chain fatty moieties which may be derived from naturally occurring fats and fatty acids, in particular straight chain saturated or unsaturated aliphatic groups having 8 to 36 carbon atoms, more particularly 16 to 24 carbon atoms.
- Particularly preferred amines of formula NR R2 3 are those wherein at least two of the groups R_, 2 and R each independently represent a straight chain aliphatic group having 16 to 24 carbon atoms, for example di(hardtallow)methyla ine, distearylmethylamine and tri (hardtallow)amine.
- a depilatory composition according to the invention can be used in method of removing hair from the body which gives re-growth of hair following treatment without the formation of a stiff stubble.
- Such a method comprises applying a the depilatory composition to the skin at an appropriate part of the body, leaving the composition in contact with the skin until the hair is adequately penetrated, usually 5-15 Ihinutes, and then removing the composition from the surface of the skin.
- compositions described herein may be compared with conventional conditioning depilatories in controlled user trials.
- the applicants have found that ' the compositions according to the ' invention are easy to formulate and have good stability on storage. Surprisingly, the compositions also have good efficacy and a reduced unpleasant smell in use, and give an excellent soft, smooth feel after use.
- sodium magnesium silicate was obtained from Laporte Industries, England, under the registered trade mark Laponite XLS; di (hardtallow) methylamine from Akzo Chemie UK Ltd, England, under the registered trade mark Armeen M2HT; distearylmethylamine from S.A. Synfina Oleofina N.V.
- Ethoxylated cetyl alcohol (Cetomacrogol 1000 BP)
- Example 1 The composition of Example 1 was prepared in which the 10% w/w smectite clay was replaced by 5% w/w smectite clay (sold under the tradename Gelwhite L) to give the depilatory cream of Example 2.
- Any suitable aerosol can, valve or actuator can be used.
- the propellant may be replaced by any suitable chloro- fluorocarbon or hydrocarbon e.g. Arcton 12/114 40/60%, dimethyl ether or blends.
- Example 1 The composition of Example 1 was prepared in which the 10% w/w smectite clay was replaced by 5% w/w kaolin clay (china clay) to give the depilatory cream of Example 5.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Birds (AREA)
- Epidemiology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Dermatology (AREA)
- Cosmetics (AREA)
Abstract
A depilatory composition comprising a depilatory compound, in particular potassium thioglycolate, and one or more smectite or kaolin clay, for example bentonite. The composition has a pH of between 11.5 and 12.7. The clay acts to improve the feel of the depilatory composition on the skin and reduces the unpleasant smell associated with the depilatory compound. A tertiary amine of the general formula: NR1R2R3, in which R1 represents a long chain fatty moiety having 8 to 36 carbon atoms and R2 and R3 each independently represent a fatty moiety having 1 to 36 carbon atom or atoms, can be added to the depilatory composition to soften the stiff stubble left by the action of the depilatory compound. The tertiary amine does not reduce the efficacy of the depilatory compound.
Description
Depilatory Compositions
This invention relates to compositions useful for removing unwanted hair from the body.
Conventional depilatory compositions, usually in the form of a cream or a lotion, are applied to the skin of the body at an appropriate place and after 5 to 15 minutes the cream is removed by means of a spatula, cotton wool, sponge or some other suitable material which is wiped over the skin. The active .ingredient of such depilatory compositions is usually an alkali or alkaline earth metal salt of an alpha or beta mercaptocarboxylic acid, e.g. potassium or calcium thioglycolate. Such ingredients are associated with an unpleasant smell which is difficult to mask.
The active ingredient penetrates the hair and destroys the cysteine bonds between the hair molecules thus weakening the hair to such an extent that merely scraping or wiping the cream off the skin breaks the hair at skin level and thus removes it. The cream has to be used at a pH of 12 to 12.5 so that the active ingredient e.g. potassium thioglycolate can penetrate the hair and thus weaken the hair structure. High pH products are potentially irritant and may reduce the condition of the treated skin. However, the skin has a self-regulating system which restores the pH to the normal range of 5 to 7, usually 5.5 plus or minus 0.5 and any hair which is just below the surface of the skin which has been attacked by the active ingredient will then revert to its normal structure and strength as the cysteine bonds are reformed. Subsequent growth of the hair thus causes it to emerge as a stiff stubble shortly after treatment. The initial growth of such
stubble can be uncomfortable in certain areas of the body particularly where the medical condition of Pseudofoliculitis exists and this discomfort is only relieved after a further day or so as the hair grows longer and more supple. The initial stiff stubble is also inconvenient because it can snag on fine fabric in clothing. ~~~
We have now discovered a depilatory composition which, whilst successful in removing unwanted body hair, gives softness of regrowth without reducing the efficacy of the depilatory compound. Surprisingly, the composition has also been found to have a less unpleasant smell than is usually associated with depilatories.
Thus, according to the present invention, there is provided a depilatory composition comprising an effective amount of a depilatory compound and one or more smectite or kaolin clay, said composition having a pH of between about 11.5 and about 12.7. Preferably said composition has a pH of between about 12 and about 12.5.
Suitable clays include smectite clays, for example bentonite, montmorillonite and hectorite; or china (kaolin) clays . Bentonite clays are preferred, for example bentonite clays available commercially e.g. under the trade names Gelwhite L, Gelwhite HNF and Westone supplied by English China Clays. The clay may be incorporated into the depilatory composition at a concentration of, for example 1 to 10% by weight, preferably 2 to 10%, more preferably 5% by weight of the depilatory composition.
Heavy metals particularly iron ions, are known to reduce the efficacy of depilatory compounds and are cosmetically unacceptable. The term 'heavy metal' as used herein denotes a metal with an atomic number greater than or equal to that of scandium, but excluding any group I or group II metals.
Thus, advantageously, the clays used in the depilatory composition have a low content of heavy metals, particularly a low content of heavy metal oxide or oxides, especially less than 1% w/w of heavy metal oxide or oxides.
Conveniently the clays comprise a low content of iron oxide and especially a low content of iron oxide in a form soluble in water. The clays may contain less than 1% w/w of Fe2C>3, preferably less than 0.8% w/w of
Fe2°3' more preferably less than 0.3% w/w of Fe2C> .
The depilatory compound may be, for example, an alkali or alkaline earth metal salt of an alpha or beta mercaptocarboxylic acid, preferably potassium or calcium thioglycolate. Varying quantities of the depilatory compound may be used for example between 3% and 10% w/w.
The depilatory compositions of the present invention may take the form of any of the known depilatory compositions, for example creams, lotions or aerosols and may be prepared using conventional methods known in the art. In addition to a depilatory compound and a smectite or kaolin clay, compositions according to the invention may contain other components which will be well known to those skilled in the art, for example emollients such as cetyl alcohol, liquid paraffin or white soft paraffin, humectants such as urea or 1,3- butylene glycol, emulsifying agents such as ethoxylated
cetyl or stearyl alcohol, antioxidants such as butylated hydroxytoluene, thickeners such as sodium magnesium silicate, seguestrants such as sodium heptonate, stabilisers such as sodium metasilicate, or perfumes.
Surprisingly, the addition of one or more smectite or kaolin clay to known conditioning depilatory compositions has been shown to improve the conditioning properties of the resultant compositions for example by improving the feel of the depilatory composition on the skin.
Accordingly, a preferred feature of the present invention provides a depilatory composition which comprises: a) an effective amount of a depilatory compound; b) one or more smectite or kaolin clay; and c) a tertiary amine of general formula I
in which R-j_ represents a fatty moiety having 8 to 36 carbon atoms, and R2 and R each independently represent a fatty moiety having 1 to 36 carbon atoms.
The term "fatty moiety" as used herein denotes a hydrocarbon moiety which may be derived from a fatty acid. The hydrocarbon moiety may be a branched or unbranched aliphatic group, which may be saturated or unsaturated, or an aromatic group and may be optionally substituted for example with one or more hydroxy groups. Preferred fatty moieties are alkyl groups having 1 to 4 carbo atoms, for example methyl, or long chain fatty moieties which may be derived from naturally occurring fats and fatty acids, in particular straight chain saturated or unsaturated aliphatic groups having 8 to 36 carbon atoms, more particularly 16 to 24 carbon atoms.
Particularly preferred amines of formula NR R2 3 are those wherein at least two of the groups R_, 2 and R each independently represent a straight chain aliphatic group having 16 to 24 carbon atoms, for example di(hardtallow)methyla ine, distearylmethylamine and tri (hardtallow)amine.
Thus, a depilatory composition according to the invention can be used in method of removing hair from the body which gives re-growth of hair following treatment without the formation of a stiff stubble. Such a method comprises applying a the depilatory composition to the skin at an appropriate part of the body, leaving the composition in contact with the skin until the hair is adequately penetrated, usually 5-15 Ihinutes, and then removing the composition from the surface of the skin.
The efficacy of the depilatory compositions described herein may be compared with conventional conditioning depilatories in controlled user trials. The applicants have found that ' the compositions according to the' invention are easy to formulate and have good stability on storage. Surprisingly, the compositions also have good efficacy and a reduced unpleasant smell in use, and give an excellent soft, smooth feel after use.
The invention is illustrated by the following Examples which are not intended to limit the invention in any way.
In the Examples, sodium magnesium silicate was obtained from Laporte Industries, England, under the registered trade mark Laponite XLS; di (hardtallow) methylamine from Akzo Chemie UK Ltd, England, under the
registered trade mark Armeen M2HT; distearylmethylamine from S.A. Synfina Oleofina N.V. , Belgium, under the trade name Radiamine 6346; propellant from ICI, England, under the registered trade mark Arcton 12/114 40/60; Cetomacrogol 1000 BP (ethoxylated cetyl alcohol) from Croda, England; ethoxylated fatty alcohol from ICI under the registered trade mark Brij 76; smectite clays from English China Clays under the registered trade mark Gelwhite (L and HNF) and under the trade name Westone L; and Fe3+" sequestrant from W R Grace Inc, USA, under the registered trade mark Detarex HM.
Example 1
Depilatory Cream % w/w
Sodium magnesium silicate (Laponite XLS]
Sodium heptonate Water
Cetyl alcohol )
Ethoxylated cetyl alcohol (Cetomacrogol 1000 BP)
Light liquid paraffin Wheatgerm oil
Ethoxylated fatty alcohol
(Brij 76)
Butylated hydroxytoluene
Di(hardtallow)methyla ine (Ar een M2HT)
Potassium thioglycolate (42%) soln.
Calcium hydroxide
Urea
Perfume 0.5
Method
a) disperse the calcium hydroxide, clay and sodium heptonate in water at 70°C, then add sodium magnesium silicate;
heat constituents of A to 70°C with mixing;
c) add b) to a) and homogenize;
d) cool to 30°C and add potassium thioglycolate;
e) add urea and perfume.
Example 2
Depilatory Cream
The composition of Example 1 was prepared in which the 10% w/w smectite clay was replaced by 5% w/w smectite clay (sold under the tradename Gelwhite L) to give the depilatory cream of Example 2.
Example 3
Depilatory Lotion % w/w
Cetyl alcohol ) 5 20 mol ethoxylated stearyl ) alcohol ) 2
Light liquid paraffin ) A 1
Distearylmethylamine ) 5 (Radiamine 6346) ) 1,3-Butylene glycol ' 1
Fe3+ sequestrant (Detarex HM) 0.1
Potassium thioglycolate soln. (42%) 14
Calcium hydroxide 0.5
Potassium hydroxide ' to pH 12.5 Perfume 0.5
Smectite clay (sold under the tradename 10 Gelwhite HNF)
Water to 100%
Method
a) heat constituents of A to 70°C with mixing;
b) heat water, Fe3+ sequestrant, clay and 1,3-butylene -glycol to 7Q°C;
c) add a) to b) with homogenisation;
d) disperse calcium hydroxide in a little water and add to c) .
e) cool to 30°C, add potassium thioglycolate soln. and adjust pH to 12.5 with potassium hydroxide;
f) add perfume.
Example 4
Depilatory (Aerosol Formulation;
Concentrate w/w
Water to 100%
• Tri (hardtallow)amine 5
Liquid paraffin BP 3
20 ol ethoxylated cetyl alcohol A 1.5
Cetyl alcohol 0.5 White soft paraffin 3
Sodium metasilicate 0.5
Potassium thioglycolate (42%) soln. 14
Calcium hydroxide 0.5
Potassium hydroxide to pH 12.5 Smectite clay (sold under the trade 5 name Westone L)
Perfume 0.5
Method
a) disperse sodium metasilicate and clay in water at 70°C;
b) heat constituents of A to 70°C with mixing;
c) add b) to a) and homogenise;
d) cool to 30°C and add potassium thioglycolate;
e) add calcium hydroxide and disperse;
f) add potassium hydroxide to pH 12.5;
g) add perfume.
Aerosol can fill:
Concentrate 90% w/w
Butane 40 10% w/w
Any suitable aerosol can, valve or actuator can be used.
The propellant may be replaced by any suitable chloro- fluorocarbon or hydrocarbon e.g. Arcton 12/114 40/60%, dimethyl ether or blends.
Example 5
The composition of Example 1 was prepared in which the 10% w/w smectite clay was replaced by 5% w/w kaolin clay (china clay) to give the depilatory cream of Example 5.
Claims
1. A depilatory composition comprising an effective amount of a depilatory compound and one or more smectite or kaolin clay, said composition having a pH of between about 11.5 and about 12.7.
2. A depilatory composition which comprises:
a) an effective amount of a depilatory compound;
b) one or more smectite or kaolin clay; and
c) a tertiary amine of general formula I:
in which R-|_ represents a fatty moiety having 8 to 36 carbon atoms and R2 and R3 each independently represent a fatty moiety having 1 to 36 carbon atoms.
3. A depilatory composition as claimed in claim 2, in which R]_ represents a straight chain aliphatic group having 8 to 36 carbon atoms and R2 and R each independently represent an alkyl group having 1 to 4 carbon atoms or a straight chain aliphatic group having 8 to 36 carbon atoms.
4. A depilatory composition as claimed in either of claims 2 and 3, in which at least two of the groups R-^, R2 and R3 each independently represent a straight chain aliphatic group having 16 to 24 carbon atoms.
5. A depilatory composition as claimed in claim 4, in which the tertiary amine of formula I is di(hardtallow) - ethylamine, distearylmethylamine or tri(hardtallow)- amine.
6. A depilatory composition as claimed in any of claims 2 to 5, containing from about 1% to about^l0% w/w of a tertiary amine of formula I.
7. A depilatory composition as claimed in any preceding claim, which is in the form of a cream, lotion or aerosol.
8. A depilatory composition as claimed in any preceding claim, in which the depilatory compound is an alkali or alkaline earth metal salt of an alpha or beta- mercaptocarboxylic acid.
9. A depilatory composition as claimed in claim 8, in which the depilatory compound is potassium or calcium thioglycolate.
10. A depilatory composition as claimed in any preceding claim, containing from about 3% to about 10% w/w of depilatory compound.
11. A depilatory composition as claimed in any preceding claim, in which the smectite clay comprises one or more of bentonite, montmorillonite or hectorite.
12. A depilatory composition as claimed in any preceding claim, in which the smectite clay is bentonite.
13. A depilatory composition as claimed in any preceding claim, in which the clay contains less than about 1% w/w of heavy metal oxide or oxides.
14. A depilatory composition as claimed in Claim 13, in which the heavy metal oxide is iron oxide.
15. A depilatory composition as claimed in Claim 14, in which the iron oxide is in a form soluble in water.
16. A depilatory composition as claimed in any preceding claim, which contains from about 1% to about 10% w/w of clay.
17. A depilatory composition as claimed in any preceding claim, which contains 5% w/w of clay.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919123076A GB9123076D0 (en) | 1991-10-31 | 1991-10-31 | Depilatory compositions |
GB9123076.3 | 1991-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993008791A1 true WO1993008791A1 (en) | 1993-05-13 |
Family
ID=10703813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1992/002494 WO1993008791A1 (en) | 1991-10-31 | 1992-10-27 | Depilatory compositions |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2876892A (en) |
GB (1) | GB9123076D0 (en) |
WO (1) | WO1993008791A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996017585A1 (en) * | 1994-12-06 | 1996-06-13 | Al-Ramadhani, Nabeel | Permanent hair growth-breaker |
WO1997014397A1 (en) * | 1995-10-16 | 1997-04-24 | Reckitt & Colman S.A. | A depilatory composition with improved rinsing properties |
GB2326335A (en) * | 1997-06-19 | 1998-12-23 | Sultan Daham | Composition for the prevention of hair re-growth |
WO1999002125A1 (en) * | 1997-07-09 | 1999-01-21 | Reckitt & Colman France | Depilatory compositions, methods for their preparation and their use |
GB2369573A (en) * | 2000-08-10 | 2002-06-05 | Reckitt Benckiser | Epilatory compositions containing particulates |
WO2008073434A1 (en) * | 2006-12-11 | 2008-06-19 | Mcneil-Ppc, Inc. | Depilatory compositions having high concentrations of alkali metal ions |
US8557229B2 (en) | 2010-03-26 | 2013-10-15 | The Procter & Gamble Company | Hair removal method and hair removal kit |
US9216304B2 (en) | 2010-03-26 | 2015-12-22 | The Gillette Company | Method of depilation and depilatory kit |
CN114053180A (en) * | 2020-07-31 | 2022-02-18 | 柳卫 | Depilatory composition and preparation method and application thereof |
FR3146804A1 (en) * | 2023-03-21 | 2024-09-27 | L'oreal | COMPOSITIONS AND METHODS FOR REMOVING COLOR FROM HAIR |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU312607A1 (en) * | А. К. Барнов | DEPILATORY | ||
GB593438A (en) * | 1944-03-14 | 1947-10-16 | Ralph Liggett Evans | Improvements in depilatories |
US3271258A (en) * | 1962-06-22 | 1966-09-06 | Oreal | Melamine and dicyandiamide as depilatory accelerators |
US4111653A (en) * | 1977-02-16 | 1978-09-05 | The Gillette Company | Alkali stannite depilatories |
EP0307129A1 (en) * | 1987-09-05 | 1989-03-15 | The Boots Company PLC | Depilatory compositions |
-
1991
- 1991-10-31 GB GB919123076A patent/GB9123076D0/en active Pending
-
1992
- 1992-10-27 AU AU28768/92A patent/AU2876892A/en not_active Abandoned
- 1992-10-27 WO PCT/EP1992/002494 patent/WO1993008791A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU312607A1 (en) * | А. К. Барнов | DEPILATORY | ||
GB593438A (en) * | 1944-03-14 | 1947-10-16 | Ralph Liggett Evans | Improvements in depilatories |
US3271258A (en) * | 1962-06-22 | 1966-09-06 | Oreal | Melamine and dicyandiamide as depilatory accelerators |
US4111653A (en) * | 1977-02-16 | 1978-09-05 | The Gillette Company | Alkali stannite depilatories |
EP0307129A1 (en) * | 1987-09-05 | 1989-03-15 | The Boots Company PLC | Depilatory compositions |
Non-Patent Citations (1)
Title |
---|
Dialog Information Service, File 350, WPI, Dialog accession no. 000879801, WPI accession no. 72-39789T/25 (BAR /), "Barium sulphide depilatory incorporating bentonite to prevent skin irritation" & SU,A,312607, publ.7225 * |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996017585A1 (en) * | 1994-12-06 | 1996-06-13 | Al-Ramadhani, Nabeel | Permanent hair growth-breaker |
US6203784B1 (en) | 1995-10-16 | 2001-03-20 | Reckitt Benckiser France | Depilatory compositions with thixotropic agents |
WO1997014397A1 (en) * | 1995-10-16 | 1997-04-24 | Reckitt & Colman S.A. | A depilatory composition with improved rinsing properties |
GB2306323A (en) * | 1995-10-16 | 1997-05-07 | Reckitt & Colmann Sa | Depilatory containing a thixotropic agent |
GB2306323B (en) * | 1995-10-16 | 1998-01-14 | Reckitt & Colmann Sa | Depilatory composition containing a thixotropic agent |
GB2326335A (en) * | 1997-06-19 | 1998-12-23 | Sultan Daham | Composition for the prevention of hair re-growth |
GB2326335B (en) * | 1997-06-19 | 1999-08-25 | Sultan Daham | Permanent prevention of undesired hair re-growth preparation and method |
US6306380B1 (en) | 1997-07-09 | 2001-10-23 | Reckitt & Colman France | Cosmetic depilatory compositions comprising a continuous aqueous phase and an oil phase |
WO1999002125A1 (en) * | 1997-07-09 | 1999-01-21 | Reckitt & Colman France | Depilatory compositions, methods for their preparation and their use |
AU755351B2 (en) * | 1997-07-09 | 2002-12-12 | Reckitt Benckiser France | Depilatory compositions, methods for their preparation and their use |
GB2369573A (en) * | 2000-08-10 | 2002-06-05 | Reckitt Benckiser | Epilatory compositions containing particulates |
GB2369573B (en) * | 2000-08-10 | 2003-04-09 | Reckitt Benckiser | Epilatory compositions |
WO2008073434A1 (en) * | 2006-12-11 | 2008-06-19 | Mcneil-Ppc, Inc. | Depilatory compositions having high concentrations of alkali metal ions |
US8557229B2 (en) | 2010-03-26 | 2013-10-15 | The Procter & Gamble Company | Hair removal method and hair removal kit |
US9216304B2 (en) | 2010-03-26 | 2015-12-22 | The Gillette Company | Method of depilation and depilatory kit |
CN114053180A (en) * | 2020-07-31 | 2022-02-18 | 柳卫 | Depilatory composition and preparation method and application thereof |
CN114053180B (en) * | 2020-07-31 | 2024-05-10 | 柳卫 | Depilatory composition, and preparation method and application thereof |
FR3146804A1 (en) * | 2023-03-21 | 2024-09-27 | L'oreal | COMPOSITIONS AND METHODS FOR REMOVING COLOR FROM HAIR |
Also Published As
Publication number | Publication date |
---|---|
AU2876892A (en) | 1993-06-07 |
GB9123076D0 (en) | 1991-12-18 |
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