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WO2019023113A1 - Composition de gel d'huile de polyacrylate de soins personnels - Google Patents

Composition de gel d'huile de polyacrylate de soins personnels Download PDF

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Publication number
WO2019023113A1
WO2019023113A1 PCT/US2018/043253 US2018043253W WO2019023113A1 WO 2019023113 A1 WO2019023113 A1 WO 2019023113A1 US 2018043253 W US2018043253 W US 2018043253W WO 2019023113 A1 WO2019023113 A1 WO 2019023113A1
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WO
WIPO (PCT)
Prior art keywords
weight
oil
meth
composition
personal care
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2018/043253
Other languages
English (en)
Inventor
Lu Bai
Liang Chen
Sylvie DOULUT
Jennifer KOENIG
Lyndsay M. LEAL
Xiang Qian LIU
Erica PARK
Fanwen Zeng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Global Technologies LLC
Rohm and Haas Co
Original Assignee
Dow Global Technologies LLC
Rohm and Haas Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Global Technologies LLC, Rohm and Haas Co filed Critical Dow Global Technologies LLC
Publication of WO2019023113A1 publication Critical patent/WO2019023113A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/04—Dispersions; Emulsions
    • A61K8/042—Gels
    • 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
    • A61K8/31—Hydrocarbons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/37—Esters of carboxylic acids
    • A61K8/375—Esters of carboxylic acids the alcohol moiety 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
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • 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
    • A61K2800/10—General cosmetic use

Definitions

  • This invention relates generally to personal care compositions that are useful as oil gel formulations.
  • the personal care compositions containing hydrophobic ester oil, a second oil selected from mineral oil, silicone oil, and combinations thereof, and acrylic copolymers.
  • compositions contain a variety of additives that provide a wide array of benefits to the composition.
  • One class of additives are oil thickeners that provide viscosity enhancements and impart good aesthetics, such as good sensory feel and clarity.
  • Oil thickening agents that are known in the art include, for example, styrene-ethylene/butadiene-styrene copolymers, polyamide polymers, and cellulose-based polymers. These thickeners, however, come with certain drawbacks, including insufficient viscosity enhancement, high formulation temperature, and lack of consistency in viscosity control in consumer product formulations.
  • WO 2014/204937 Al discloses personal care compositions comprising a polyacrylate oil gel containing a cosmetically acceptable hydrophobic ester oil and a polymer including at least two polymerized units.
  • the prior art does not, however, disclose a polyacrylate oil gel according to the present invention which achieves the significant viscosity performance at low formulation temperatures while also providing a clear formulation. Accordingly, there is a need to develop thickeners that provide significant viscosity enhancements to composition containing blends of hydrophobic ester oils, and mineral oils and/or silicone oils, while not suffering from the drawbacks of the prior art.
  • One aspect of the invention provides a personal care composition
  • a personal care composition comprising a polyacrylate oil gel comprising (a) a cosmetically acceptable hydrophobic ester oil, (b) a cosmetically acceptable mineral oil, and (c) one or more polymers comprising polymerized structural units of (i) 96 to 99.79 weight % of C 4 -Cs (meth)acrylate monomers, (ii) 0.2 to 2 weight % of (meth)acrylic acid monomer, and (iii) 0.01 to 2 weight % of at least one crosslinker; wherein the composition comprises (1) the cosmetically acceptable hydrophobic ester oil and the mineral oil in a combined amount of from 80 to 99.9 weight %, based on the total weight of the personal care composition, wherein the hydrophobic ester oil is present in an amount of from 12.5 to 97 weight %, and the mineral oil is present in an amount of from 3 to 87.5 weight %, based on the total combined weight of the hydrophobic ester oil and mineral oil,
  • compositions comprising a cosmetically acceptable hydrophobic ester oil, a second cosmetically acceptable oil selected from mineral oil, silicone oil, and combinations thereof, and polymers having a high weight percent of polymerized structural units of C 4 -Cs (meth)acrylate monomer, a small weight percent of (meth)acrylic acid monomer, and a small weight percent of crosslinker, provide significant viscosity enhancements while retaining clarity in personal care formulations.
  • the present invention provides in one aspect a personal care composition
  • a polyacrylate oil gel comprising (a) hydrophobic ester oil, (b) a second oil selected from mineral oil, silicone oil, and combinations thereof, and (c) one or more polymers comprising polymerized structural units of (i) 96 to 99.79 weight % of C 4 -Cs (meth)acrylate monomers, (ii) 0.2 to 2 weight % of (meth)acrylic acid monomer, and (iii) 0.01 to 2 weight % of at least one crosslinker.
  • personal care is intended to refer to cosmetic and skin care compositions for application to the skin, including, for example, leave on application to the skin, such as lotions, creams, gels, gel creams, serums, toners, wipes, liquid foundations, make-ups, tinted moisturizer, oils, face/body sprays, topical medicines, and sunscreen compositions.
  • Periodic care relates to compositions to be topically administered (i.e., not ingested).
  • the personal care composition is cosmetically acceptable.
  • Cosmetically acceptable refers to ingredients typically used in personal care compositions, and is intended to underscore that materials that are toxic when present in the amounts typically found in personal care compositions are not contemplated as part of the present disclosure.
  • the compositions of the invention may be manufactured by processes well known in the art, for example, by means of conventional mixing, dissolving, granulating, emulsifying, encapsulating, entrapping or lyophilizing processes.
  • polymer refers to a polymeric compound prepared by polymerizing monomers, whether of the same or a different type.
  • the generic term “polymer” includes the terms “homopolymer,” “copolymer,” and “terpolymer.”
  • polymerized structural units" of a given monomer refers to the remnant of the monomer after polymerization.
  • (meth)acrylate refers to either acrylate or methacrylate
  • (meth)acrylic refers to either acrylic or methacrylic.
  • substituted refers to having at least one attached chemical group, for example, alkyl group, alkenyl group, vinyl group, hydroxyl group, carboxylic acid group, other functional groups, and combinations thereof.
  • polyacrylate oil gel refers to a composition containing an oil and a polyacrylate, wherein the polyacrylate is miscible in the oil phase.
  • inventive personal care compositions include one or more polymers comprising structural units of C 4 -Cs (meth)acrylate monomers, (meth)acrylic acid monomers, and crosslinkers.
  • Suitable C 4 -Cs (meth)acrylate monomers include, for example, n-butyl
  • the C 4 -Cs (meth)acrylate monomers comprise one or more of i-butyl methacrylate, n-butyl methacrylate, and ethylhexyl methacrylate.
  • the polymer comprises polymerized structural units of C 4 -Cs (meth) acrylate monomers in an amount of from 96 to 99.79 weight %, preferably from 97.5 to 99.5 weight %, more preferably from 98.2 to 99.3 weight %, and more preferably from 98.9 to 99.1 weight %, based on the total weight of the polymer.
  • the C 4 -Cs (meth)acrylate monomers comprise i-butyl methacrylate and ethylhexyl methacrylate in a ratio of from 9: 1 to 2:3, preferably from 3:2 to 2:3, and more preferably 1: 1.
  • the polymers of the inventive personal care compositions also comprise structural units of (meth)acrylic acid monomer.
  • the polymer comprises polymerized structural units of (meth)acrylic acid monomer in an amount of from 0.1 to 2 weight %, preferably from 0.5 to 1.5 weight %, and more preferably from 0.75 to 1.25 weight %, based on the total weight of the polymer.
  • the polymers of the inventive personal care composition also comprise polymerized structural units of at least one crosslinker.
  • Crosslinkers are monomers having two or more non- conjugated ethylenically unsaturated groups.
  • Suitable crosslinkers include, for example, di- or tri-allyl ethers and di- or tri-(meth)acrylyl esters of diols or polyols (e.g., trimethylolpropane diallyl ether (TMPDE), trimethylolpropane trimethacrylate (TMPTMA), and ethylene glycol dimethacrylate (EGDMA)), di- or tri-allyl esters of di- or tri-acids (e.g., diallyl phthalate), allyl (meth)acrylate, divinyl sulfone, triallyl phosphate, and divinylaromatics (e.g., divinylbenzene).
  • TMPDE trimethylolpropane diallyl ether
  • the polymer comprises polymerized structural units of crosslinker in an amount of from 0.01 to 2 weight %, preferably from 0.5 to 1.25 weight %, and more preferably from 0.1 to 0.5 weight %, based on the total weight of the polymer.
  • the polymers have an average particle size of from 50 to 2,000 nm, preferably of from 75 to 1,100 nm, and more preferably of from 100 to 200 nm. Polymer molecular weights can be measured by standard methods such as, for example, size exclusion chromatography or intrinsic viscosity. In certain embodiments, the polymers are present in the personal care composition in an amount of from 0.1 to 20 weight %, preferably from 2 to 13.5, and more preferably from 3 to 7 weight %, based on the total weight of the personal care composition.
  • Suitable polymerization techniques for preparing the polymers contained in the inventive personal care compositions include, for example, emulsion polymerization.
  • Aqueous emulsion polymerization processes typically are conducted in an aqueous reaction mixture, which contains at least one monomer and various synthesis adjuvants, such as the free radical sources, buffers, and reductants in an aqueous reaction medium.
  • a chain transfer agent may be used to limit molecular weight.
  • the aqueous reaction medium is the continuous fluid phase of the aqueous reaction mixture and contains more than 50 weight % water and optionally one or more water miscible solvents, based on the weight of the aqueous reaction medium.
  • Suitable water miscible solvents include, for example, methanol, ethanol, propanol, acetone, ethylene glycol ethyl ethers, propylene glycol propyl ethers, and diacetone alcohol.
  • the aqueous reaction medium contains more than 90 weight % water, preferably more than 95 weight % water, and more preferably more than 98 weight % water, based on the weight of the aqueous reaction medium.
  • the polymers of the present invention may be isolated by a spray drying process. While spray drying is one preferred embodiment of how to produce the dry powder, other suitable methods include, for example, freeze drying, a two-step process including the steps of (i) pan drying the emulsion and then (ii) grinding the pan dried material into a fine powder, coagulation of the acrylic emulsion and collection of the powder by filtration followed by washing and drying, fluid bed drying, roll drying, and freeze drying. Suitable techniques for spray drying the polymer beads of the present invention are known in the art, for example, as described in US 2014/0113992 Al. In certain embodiments, anti-caking agents are used when spray drying the polymer beads.
  • Suitable anti-caking agents include, for example, mineral fillers (e.g., calcium carbonate, kaolin, titanium oxide, talc, hydrated alumina, bentonite, and silica), solid polymer particles with a T g or T m greater than 60°C (e.g., polymethylmethacrylate, polystyrene, and high density polyethylene), and water soluble polymers with a T g greater than 60°C (e.g., polyvinyl alcohol and methylcellulose).
  • the anti-caking agent can be mixed in the acrylic suspension prior to spray drying or introduced as a dry powder in the spray drying process.
  • the anti-caking agent coats the polymer beads to prevent the beads from sticking to each other inner wall of the dryer.
  • the anti-caking agent is present in an amount of from 0 to 20 weight %, and more preferably from 0.01 to 10 weight %, based on the total weight of the polymer beads.
  • the personal care compositions of the present invention also contain a cosmetically acceptable hydrophobic ester oil.
  • a cosmetically acceptable hydrophobic ester oil In general, any hydrophobic ester oil or mixtures thereof which are toxicologic ally safe for human or animal use may constitute the oil base of the present invention.
  • the hydrophobic ester oil comprises aliphatic C8-C24 alkyl triglycerides.
  • Suitable hydrophobic ester oils include, for example, caprylic/capric triglycerides, saturated fatty esters and diesters (e.g., isopropyl palmitate, octyl palmitate, butyl stearate, isocetyl stearate, octadodecyl stearate, octadodecyl stearoyl stearate, diisopropyl adipate, and dioctyl sebacate), and animal oils and vegetable oils (e.g., mink oil, coconut oil, soybean oil, palm oil, corn oil, cocoa butter, sesame oil, sunflower seed oil, jojoba oil, olive oil, and lanolin oil).
  • caprylic/capric triglycerides saturated fatty esters and diesters (e.g., isopropyl palmitate, octyl palmitate, butyl stearate, isocetyl stearate
  • the hydrophobic ester oil is diffused in an oil base.
  • Suitable oil bases include any oil or mixture of oils which are conventionally used in personal care products including, for example, paraffin oils, paraffin waxes, and fatty alcohols (e.g., stearyl alcohol, isostearyl alcohol, and isocetyl alcohol).
  • the hydrophobic ester oil comprises one or more of caprylic/capric triglycerides and sunflower seed oil.
  • the personal care compositions of the present invention also contain a second cosmetically acceptable oil selected from mineral oils, silicone oils, and combinations thereof.
  • the second cosmetically acceptable oil comprises mineral oil.
  • mineral oils are clear, colorless, and odorless hydrocarbons derived from petroleum, and are also known in the art as "liquid paraffin.”
  • mineral oil refers to both unrefined and refined (light) mineral oil.
  • the mineral oil is a refined (light) mineral oil comprising a blend of Cs to C 4 o straight-chain alkanes.
  • the refined (light) mineral oil comprises a blend of Cs to C 4 o straight- chain and branched-chain alkanes.
  • the mineral oil has a density of from 0.7 to 0.9 g/cm 3 , preferably of about 0.8 g/cm 3 .
  • Suitable mineral oils include, for example, those commercially available under the tradenames AVATECHTM from Avatar, DRAKEOLTM from Calumet Penreco, SIRIUSTM from Shell, and CITATIONTM from Avatar.
  • the second cosmetically acceptable oil comprises silicone oil.
  • Suitable silicone oils includes, for example, polydimethylsiloxane.
  • the silicone oil is a low viscosity silicone, a volatile methyl siloxane, a volatile ethyl siloxane, or a volatile methyl ethyl siloxane, having a viscosity from 1-1,000 mm 2 /s, 2-50 mm 2 /s, or 5-50 mm 2 /s, measured at 25°C, for example, hexamethylcyclotrisiloxane,
  • octamethylcyclotetrasiloxane decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane,
  • polyethylsiloxanes polymethylethylsiloxanes , polymethylphenylsiloxanes ,
  • silicone oils examples include DOW CORNING® 200 Fluids, e.g. 2 cSt and 5 cSt; and DOW CORNING® FZ-3196.
  • the personal care compositions include a blend of hydrophobic ester oil, and mineral oil and/or silicone oil in an amount of from 80 to 99.9 weight %, preferably from 90 to 99 weight %, and more preferably from 93 to 97 weight %, based on the total weight of the personal care composition.
  • the hydrophobic ester oils are present in an amount of from 12.5 to 97 weight %, preferably from 50 to 97 weight %, and more preferably from 75 to 97 weight %, based on the total combined weight of the hydrophobic ester oil and mineral oil.
  • the minerals oils are present in an amount of from 3 to 87.5 weight %, preferably from 3 to 50 weight %, and more preferably from 3 to 25 weight %, based on the total combined weight of the hydrophobic ester oil and mineral oil.
  • the personal care compositions according to the present invention may be formulated by conventional mixing processes known to those skilled in the art.
  • the formulation temperature is from 5 to 150°C, preferably from 25 to 70°C.
  • the order of addition of the polymer particles, hydrophobic ester oil, and mineral oil and/or silicone oil is not consequential, and thus can be mixed in any order of addition.
  • the inventive personal care compositions also include a dermatologically acceptable carrier.
  • a dermatologically acceptable carrier is typically characterized as a carrier or a diluent that does not cause significant irritation to the skin and does not negate the activity and properties of active agent(s) in the composition.
  • Examples of dermatologically acceptable carriers that are useful in the invention include, without limitation, water, such as deionized or distilled water, emulsions, such as oil-in-water or water-in-oil emulsions, alcohols, such as ethanol, isopropanol or the like, glycols, such as propylene glycol, glycerin or the like, creams, aqueous solutions, oils, ointments, pastes, gels, lotions, milks, foams, suspensions, powders, or mixtures thereof.
  • the aqueous solutions may contain cosolvents, e.g., water miscible cosolvents.
  • Suitable water miscible cosolvents include, for example, ethanol, propanol, acetone, ethylene glycol ethyl ethers, propylene glycol propyl ethers, and diacetone alcohol.
  • the composition contains from about 99.99 to about 50 percent by weight of the dermatologically acceptable carrier, based on the total weight of the composition.
  • compositions of the invention may be included in the compositions of the invention such as, but not limited to, abrasives, absorbents, aesthetic components such as fragrances, pigments,
  • colorings/colorants essential oils, skin sensates, astringents (e.g., clove oil, menthol, camphor, eucalyptus oil, eugenol, menthyl lactate, witch hazel distillate), preservatives, anti-caking agents, a foam building agent, antifoaming agents, antimicrobial agents (e.g., iodopropyl)
  • astringents e.g., clove oil, menthol, camphor, eucalyptus oil, eugenol, menthyl lactate, witch hazel distillate
  • preservatives e.g., clove oil, menthol, camphor, eucalyptus oil, eugenol, menthyl lactate, witch hazel distillate
  • preservatives e.g., clove oil, menthol, camphor, eucalyptus oil, eugenol, menthyl lactate, witch hazel
  • butylcarbamate antioxidants, binders, biological additives, buffering agents, bulking agents, chelating agents, chemical additives, cosmetic astringents, cosmetic biocides, denaturants, drug astringents, external analgesics, film formers or materials, e.g., polymers, for aiding the film- forming properties and substantivity of the composition (e.g., copolymer of eicosene and vinyl pyrrolidone), opacifying agents, pH adjusters, propellants, reducing agents, sequestrants, skin bleaching and lightening agents (e.g., hydroquinone, kojic acid, ascorbic acid, magnesium ascorbyl phosphate, ascorbyl glucosamine), skin-conditioning agents (e.g., humectants, including miscellaneous and occlusive), skin soothing and/or healing agents (e.g., panthenol and derivatives (e.g., ethyl
  • Exemplary polymers in accordance with the present invention and comparative polymers contain the components recited in Table 1.
  • iBMA isobutyl methacrylate
  • EHMA ethylhexyl methacrylate
  • MAA methacrylic acid
  • MMA methyl methacrylate
  • TMPTMA trimethylolpropane trimethacrylate
  • TMPDE trimethylolpropane diallyl ether
  • EGDMA ethylene glycol dimethylacrylate
  • Synthesis of exemplary polymer P-E6 was carried out as follows. A three liter round bottom flask was equipped with a mechanical overhead stirrer, heating mantle, thermocouple, condenser and inlets for the addition of monomer, initiator and nitrogen. The kettle was charged with 470 grams deionized water and 7.46 grams of DS-4 (Polystep A-16-22: sodium
  • a kettle buffer solution of 1.92 grams of ammonium bicarbonate and 12.71 grams of deionized water was prepared and set aside.
  • a preform seed of 22.38 grams was removed from the stable monomer emulsion and put into a small beaker.
  • a rinse of 16.8 grams of deionized water was prepared.
  • a co-feed catalyst charge of 0.28 grams of ammonium persulfate and 49.22 grams of deionized water was prepared and set aside.
  • the kettle buffer solution and initial catalyst solution were added to the reactor, followed by the perform seed and rinse.
  • the reaction was monitored for a small exotherm. After the exotherm, the temperature control was adjusted to 83-85°C.
  • the monomer emulsion feed was added to the kettle, sub-surface, at a rate of 4.40 grams/minute for 15 minutes. After 15 minutes, the rate was increased to 8.80 grams/minutes for 75 minutes, giving a total feed time of 90 minutes. While the monomer emulsion feed was added to the kettle, the co-feed catalyst solution was also added over 90 minutes at a rate of 0.55
  • the chase promoter solution was added as a shot to the kettle.
  • the kettle contents were then cooled to 70°C, while adding the chase activator and chase catalyst solutions separately by syringe over 60 minutes at a feed rate of 0.7 grams/minute.
  • the reaction was held for 10 minutes, and then cooled to room temperature.
  • the emulsion was filtered through a 100 mesh bag.
  • Exemplary polymers P-El, P-E2, P-E3, P-E4, and P-E5 were prepared substantially as described above, with the appropriate changes in monomer and monomer amounts as recited in Table 1.
  • Exemplary and comparative polymers as prepared in Example 1 were evaluated for particle size as shown in Table 2.
  • the particle size distributions was determined by light scattering using a Malvern Mastersizer 2000 Analyzer equipped with a 2000uP module. Approximately 0.5 g of polymer emulsion samples were pre-diluted into 5 mL of 0.2 weight % active Triton 405 in degassed, DI water
  • Exemplary polymers as prepared in Example 1 were spray dried according to the following procedure.
  • a two-fluid nozzle atomizer was equipped on a Mobile Minor spray dryer (GEA Process Engineering Inc.).
  • the spray drying experiments were performed under an inert atmosphere of nitrogen.
  • the nitrogen supplied to the atomizer at ambient temperature was set at 1 bar and 50% flow, which is equivalent to 6.0 kg/hour of flow rate.
  • the polymer emulsion was fed into the atomizer at about 30 mL/min using a peristaltic pump (Masterflex L/S). Heated nitrogen was used to evaporate the water.
  • the inlet temperature was set at 140°C, and the outlet temperature was equilibrated at 40-50°C by fine tuning the emulsion feed rate.
  • the resulting polymer powder was collected in a glass jar attached to the cyclone and subsequently vacuum dried at room temperature to removed residual moisture.
  • Exemplary oil gel formulations according to the present invention including exemplary polymers as prepared in Example 3 and comparative oil gel formulations contain the components recited in Table 3(a), Table 3(b), Table 3(c), and Table 3(d) which contain mineral oil and hydrophobic ester oil in ratios of 100:0, 75:25, 50:50, and 25:75, respectively.
  • Exemplary formulations were formulated by mixing the exemplary polymers as prepared in Example 3 together with the other components in the amounts specified in Table 3(a), Table 3(b), Table 3(c), and Table 3(d) under stirring at 900 rpm at 70°C for 1 hour.
  • the clarity of each sample was evaluated using image analysis of formulation pictures.
  • the sample formulation was loaded into a 1 mL transparent glass vial and placed in front of a black background.
  • Optical images were captured using side lighting and then analyzed with image recognition software based on grayscale values 0-255 (clear solution having a value of 0).
  • the grayscale value is typically less than 26.
  • the results demonstrate that the inventive formulations exhibit superior clarity, while the polymer in the comparative formulation aggregated.
  • the turbidity of each sample formulation was evaluated using a Laboratory Hach Turbidimeter. Samples were placed in the light path using measuring cells of standard dimensions (1 cm). The light passing through the solution (i.e., non scattered) was measured with a photocell. The greater the light measured, the less the turbidity. For a high clarity formulation, the turbidity is below 20. The results demonstrate that the inventive formulations exhibit superior clarity.
  • Example 4 were measured using a DHR3 TA instrument rheometer with a 60 mm 0.5° cone plate (Peltier plate Aluminum) with truncation gap 17 ⁇ . All measurements were performed at 20°C. A logarithmic step ramp method was used ranging over the shear rate of 0.05-700 1/s with 5 data points per decade after an initial 10 s equilibration.
  • the exemplary oil gel formulations demonstrated an increase in viscosity and shear thinning behavior, which is highly desirable in personal care formulations.

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Abstract

L'invention concerne des compositions de soins personnels comprenant un gel d'huile de polyacrylate comprenant (a) au moins une huile d'ester hydrophobe cosmétiquement acceptable, (b) une seconde huile cosmétiquement acceptable choisie dans le groupe constitué d'huile minérale, d'huile de silicone et de combinaisons de celles-ci, et (c) un ou plusieurs polymères comprenant des motifs structuraux polymérisés de (i) 96 à 99,79 % en poids de monomères de (méth)acrylate en C4-C8, (ii) 0,2 à 2 % en poids de monomère d'acide (méth)acrylique, et (iii) 0,01 à 2 % en poids d'au moins un agent de réticulation.
PCT/US2018/043253 2017-07-24 2018-07-23 Composition de gel d'huile de polyacrylate de soins personnels Ceased WO2019023113A1 (fr)

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US201762536078P 2017-07-24 2017-07-24
US62/536,078 2017-07-24
EP17290140.7 2017-11-02
EP17290140 2017-11-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022530756A (ja) * 2019-04-30 2022-07-01 ダウ グローバル テクノロジーズ エルエルシー ポリマー油ブレンド
CN115975459A (zh) * 2022-12-30 2023-04-18 成都虹润制漆有限公司 一种含中药成分的抗污防掉砂真石漆及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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