Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
  • C11B9/00—Essential oils; Perfumes
• • 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
  • A61K8/34—Alcohols
  • A61K8/345—Alcohols containing more than one hydroxy group
• • 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
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/068—Microemulsions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q13/00—Formulations or additives for perfume preparations

Definitions

• the present invention relates to methods for making transparent aqueous microemulsions, as well as compositions and uses for the same.
• the present invention provides a personal care composition, comprising a microemulsion including a compound of Formula I:
• Ri is H or methyl
• R 2 is substituted or unsubstituted C 3 -C 5 alkyl, or CH 2 (OH)-CH 2 -0-R 3 ;
• R 3 is C 6 -C 8 alkyl
• R 2 is n-propyl, isopropyl, n-butyl, isobutyl, or sec-butyl.
• R 2 is CH 2 (OH)-C3 ⁇ 4-0-R 3
• R 3 is heptyl or octyl.
• Compounds of the Formula I may be synthesized by catalytic reductive etherifi cation in a known manner.
• the amount of the compound of Formula I present in the microemulsion is generally from 1% by weight to 50 wt. %, preferably from 1 wt. % to 25 wt. %, more preferably from 3 wt. % to 20 wt.
• microemulsion denotes a pseudo one-phase transparent mixture of two immiscible fluids. Microemulsions are thermodynamically stable and form spontaneously. Microemulsions are transparent or translucent, and do not display the opalescence of standard emulsions. The particle size of the resulting droplets is small enough so the resulting mixture is optically clear or translucent. Microemulsion droplet sizes are variously defined in the art with a droplet size typically below 0.14 micron.
• the microemulsion further comprises an aqueous medium, preferably water.
• the amount of aqueous medium present in the composition is generally from 50 wt. % to 95 wt. %, preferably from 55 wt. % to 90 wt. % and more preferably from 60 wt. % to 85 wt. %.
• the microemulsion further comprises one or more surfactants.
• surfactants Cationic, anionic, non-ionic, zwitterionic, amphophilic, or polymeric surfactants, and mixtures thereof may be used.
• Preferred surfactants include mixtures of non-ionic surfactants and anionic surfactants, mixtures of non-ionic surfactants and cationic surfactants, and mixtures of non-ionic surfactants and zwitterionic surfactants.
• surfactants are ethyloxalated alkanes, fatty acids, fatty acid salts, sulfonates or quaternary ammonium salts, and especially polyoxyethylene fatty ether surfactants, stearic acid and stearic acid salts, most preferably the sodium salt of stearic acid, sodium lauryl sulfate (SLS), sodium laureth sulfate (SLES), lauryl trimethyl ammonium chloride, Brij 30 (trademark of Uniqema, Chemical Abstracts name Poly(oxy-l,2-ethanediyl), alpha-dodecyl-omega- hydroxy-(9CI), Registery Number 9002-92-0), cetyl trimethyl ammonium chloride, or combinations thereof.
• the surfactants are a mixture of non-ionic surfactants and anionic surfactants in a ratio of from 65:35 to 35:65, preferably 60:40.
• the amount of surfactant which may be used in the composition of the present invention is generally from 0 wt. % to 50 wt. %, preferably from 0 wt. % to 20 wt. %, more preferably from 0 to 15 wt.% and most preferably from 0 to 10 wt. ; and when the surfactant is present in the composition, the amount of surfactant is preferably from 0.1 wt. % to 15 wt. %, and more preferably from 0.5 wt. % to 10 wt. %.
• the microemulsion further comprises contain one or more additional ingredients, such as antioxidants, chelating agents, UV filters, preservatives, thickening agents, cosmetic active ingredients, moisturizers, humectants, emollients, opacifiers, pearly gloss impacting substances, pigments, colorants, dyes and antifoams.
• additional ingredients are generally present in the composition of the present invention from 0 wt % to 5 wt %, preferably from 0.5 wt % to 3 wt %, and more preferably from 0.1 wt % to 1 wt %.
• microemulsion perfumed aqueous cosmetic composition according to the present invention may be prepared, for example, by simple mixing of all the ingredients; for example by hand stirring or if need be by using a mechanical mixer (i.e. by some mechanically agitating means), the components of the present invention, and any optional components, to form a homogeneous mixture.
• a mechanical mixer i.e. by some mechanically agitating means
• the components of the present invention may be added together into a suitable reaction vessel and mixed in any order, using conventional processes well known to those skilled in the art.
• the microemulsion may be produced at room temperature or at an elevated temperature, for example up to 90°C, preferably up to 55 °C can be employed.
• Microemulsions can be formulated to be optically clear, and stable from 5°C to 55 °C.
• the microemulsion further comprises a fragrance, such as natural and/or synthetic fragrance raw materials, such as essential oils.
• a fragrance such as natural and/or synthetic fragrance raw materials, such as essential oils.
• perfume oils oil soluble perfume oils.
• Microemulsion compositions of the present invention exhibit low odor, pleasant skin feel, and can be formulated as clear stable perfumes with high fragrance loading, for example, from 1 percent by weight to 30 percent by weight essential oils. in several different product forms, such as fragrances, Eaux de Toilettes, aqueous perfumes, body sprays, body deodorants as well as products such as refreshing and cleaning wet towels, aqueous cosmetic compositions, household cleaners, air fresheners and sprayable formulations.
• the perfumed aqueous microemulsion composition will advantageously include from 1% by weight (wt. %) to 50 wt.
• the weight ratio between the fragrance material and the surfactant, if present in the composition of the present invention generally is from 0.2: 1 to 10: 1, preferably from 0.5: 1 to 6: 1, more preferably from 1: 1 to 5: 1, and most preferably from 2: 1 to 4: 1.
• the perfume is ethanol-free.
• “Ethanol-free” means substantially free of ethanol, i.e., less than 1 wt %, and more preferably zero weight percent.
• the components are mixed until a transparent microemulsion forms, usually requiring on average 0.75g of a compound of Formula I.
• the Fragrance Oil : Surfactant ratio is 1.667, and the ratio of nonionic to anionic surfactant is 60:40.
• compositions substantially according to Examples 1 and 2 were made and compared for solvent efficiency, the amount of specified compound of Formula I required to make a transparent microemulsion in comparison to the amount of 1,2 Hexane Diol required to make Comparative Batch 1.
• Batches A-C were repeatedly found to more efficient (requiring less respective compound of Formula I (for Batch A: 0.68-0.8 depending on fragrance; for Batch B: 0.69-0.89 depending on fragrance; for Batch C: 0.69-0.7 depending on fragrance)) than the comparative batch.
• Batch E was almost comparable to Comparative Batch 1.
• Batches D, F, and G were not as efficient, Batch F yielding only gels.
• the components are mixed until a transparent microemulsion forms, usually requiring on average
• compositions substantially according to Examples 4 and 2 were made and compared for solvent efficiency, the amount of specified compound of Formula I required to make a transparent microemulsion in comparison to the amount of 1,2 Hexane Diol required to make Comparative Batch

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Epidemiology (AREA)
• Birds (AREA)
• Emergency Medicine (AREA)
• Dispersion Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Cosmetics (AREA)
• Colloid Chemistry (AREA)

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• 2012
  • 2012-12-11 WO PCT/US2012/068899 patent/WO2013095994A2/en not_active Ceased
  • 2012-12-11 US US14/365,891 patent/US20140357546A1/en not_active Abandoned
  • 2012-12-11 BR BR112014013684A patent/BR112014013684A2/pt not_active Application Discontinuation
  • 2012-12-11 CN CN201280060292.7A patent/CN103987360A/zh active Pending
  • 2012-12-11 JP JP2014549112A patent/JP2015503514A/ja active Pending
  • 2012-12-11 EP EP12809033.9A patent/EP2793799A2/en not_active Withdrawn

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