FR3159329A3 - COSMETIC ADHESIVE COMPOSITIONS - Google Patents

Abstract

COSMETIC ADHESIVE COMPOSITIONS A cosmetic adhesive composition is provided. The cosmetic adhesive composition includes water; from about 10% to 20% by weight of one or more acrylic latex polymers having a glass transition temperature (Tg) below about -40°C; one or more aqueous polyurethane dispersions; and one or more saccharide esters of at least one C2-C4 organic acid. The one or more acrylic latex polymers having a glass transition temperature below about -40°C and the one or more aqueous polyurethane dispersions are present in a concentration by weight ratio that is in a range of about 1:3 to about 3:1. Methods for adhering false eyelashes and eyebrows are also provided. Figure for abstract: none

Description

COSMETIC ADHESIVE COMPOSITIONS

The present disclosure relates to cosmetic adhesive compositions, such as those suitable for adhering false eyelashes or eyebrows for extended periods of time.

CONTEXT

To achieve the desired aesthetics of a user's eyelashes and eyebrows, false eyelashes and eyebrows may be used. These may be adhered using an adhesive or "glue." The inventors of the present invention have found that it is not only important that this glue not only provides adhesion to body surfaces, but also that it provides sufficient cohesion of the glue itself, so that the glue lasts sufficiently long.

BRIEF SUMMARY

A cosmetic adhesive is provided. The cosmetic adhesive composition may include water; about 10% to 20% by weight of one or more acrylic latex polymers having a glass transition temperature ( _Tg ) less than about -40°C; one or more aqueous polyurethane dispersions; and one or more saccharide esters of at least one C2-C4 organic acid. The one or more acrylic latex polymers having a low glass transition temperature and the one or more aqueous polyurethane dispersions are present in a ratio of the weight concentration of the one or more acrylic latex polymers having a low glass transition temperature to the weight concentration of the one or more aqueous polyurethane dispersions that is in a range of about 1:3 to about 3:1.

Preferably, the ratio of the weight concentration of the one or more acrylic latex polymers having a low glass transition temperature to the weight concentration of the one or more aqueous polyurethane dispersions is in a range of about 1:1 to about 2:1.

Preferably, the one or more acrylic latex polymers having a glass transition temperature (T _g ) may have a T _g less than about -50°C.

Preferably, the one or more aqueous polyurethane dispersions are formed by reacting a polyester prepolymer with a non-phenylated isocyanate.

It is desirable that the composition be substantially free of one or more waxes, oils, silicones and/or C2-C6 polyols.

It is desirable that the composition optionally include one or more additional adhesive polymers, and that the total concentration by weight of the one or more acrylic latex polymers having a glass transition temperature (T _g ) less than about -40°C; the one or more aqueous polyurethane dispersions; the one or more saccharide esters of at least one C2-C4 organic acid, and the one or more additional adhesive polymers is in a range of about 30% to about 70%.

It is desirable that the one or more acrylic latex polymers having a glass transition temperature (Tg) less than about -40°C be present in the composition at a concentration by weight of about 10% to about 20% of the composition.

It is desirable that the one or more aqueous polyurethane dispersions be present in the composition at a concentration by weight of about 8% to about 20% of the composition.

It is desirable that the one or more saccharide esters of at least one C2-C4 organic acid be present in an amount of 5% to about 30% by weight of the composition. The composition may include one, a plurality, or even all of the features described above.

In another aspect, a method of adhering a false eyelash includes applying the composition described above to a surface selected from a false eyelash, a natural eyelash, or combinations thereof to form an active adhesive surface. It further includes contacting the active adhesive surface with a corresponding mating surface (false eyelash or natural eyelash) to form an augmented eyelash. For example, the adhesive may be applied to a false eyelash and then attached to a corresponding natural eyelash; or the adhesive may be applied to a natural eyelash and then attached to a corresponding false eyelash. Similarly, the method may further include adhering a false eyebrow, and may include applying the composition described above to a surface selected from a false eyebrow, a natural eyebrow, or combinations thereof to form an active adhesive surface. It further includes contacting the active adhesive surface with a corresponding mating surface (false eyebrow or natural eyebrow) to form an augmented eyebrow. For example, the adhesive may be applied to a false eyebrow and then attached to a corresponding natural eyebrow; or the adhesive may be applied to a natural eyebrow and then attached to a corresponding false eyebrow. In other embodiments, the cosmetic adhesive is applied to the surface of the skin, such as the skin of the eyelid or the skin of the eyebrow area.

DETAILED DESCRIPTION

Outside of the working examples, or unless otherwise indicated, all numbers expressing amounts of ingredients (e.g., concentrations, ratios, etc.) and/or reaction conditions should be understood to be modified in certain embodiments by the term "about," meaning within 10% to 15% of the number indicated (e.g., "about 10%" means 8.5% to 11.5%, especially 9% to 11%, and about 2% means 1.7% to 2.3%, especially 1.8% to 2.2%).

Similarly, for ratios, the modifier “about” means to within 10% or 15% of the number. For example, about 4:1 means from 3.4:1 to 4.6:1, preferably from 3.6:1 to 4.4:1. As will be readily understood by those skilled in the art, when the first ingredient in a ratio is less than the second, then a ratio may be expressed “inversely.” For example, if a second ingredient, B, is present in an amount or concentration 2.5 times greater than that of ingredient A, this may be identified as an A:B ratio of 1:2.5. “About 1:10” means from 1:8.5 to 1:11.5, preferably from 1:9 to 1:11. Unless otherwise indicated, all concentrations stated as percentages are concentrations by weight and also, unless otherwise indicated, relate to the entire cosmetic adhesive composition.

As used herein, the term " at least one" means one or more.

As used herein, the term " free " or " completely free (of a component) " refers to compositions that do not contain the component to any degree measurable by standard means. As used herein, the term " substantially free (of a component) " refers to compositions that do not contain an appreciable amount of the component, e.g., not more than about 1% by weight, or not more than about 0.5% by weight, or not more than about 0.3% by weight, such as not more than about 0.1% by weight, based on the total weight of the composition.

In some embodiments, the composition may be, for example, a single phase.

Water

The adhesive composition includes water. In some embodiments, water may be present in amounts up to 65% by weight of the composition. In some embodiments, water may be present in amounts of 15%, 20%, 25%, 30% or 35% up to 45%, 50%, 55%, 60% or 65% by weight of the composition, including any combinations or subranges of these values.

The compositions of the present invention include adhesive polymers such as those described below: one or more acrylic latex polymers having a low glass transition temperature, one or more aqueous polyurethane dispersions, one or more saccharide esters of at least one C2-C4 organic acid, and other optional adhesive polymers. The total amount of the adhesive polymers in the composition may range from about 30%, 35%, 40% or 45% to about 45%, 50%, 55%, 60%, 65% or 70% by weight.

Acrylic latex polymer having a low glass transition temperature (T _g )

In some embodiments, the cosmetic adhesive composition may include an acrylic latex polymer having a low glass transition temperature (T _g ). Such acrylic latex polymers will have a T _g value of no more than -40ºC, and preferably no more than -45ºC, and preferably no more than -50ºC, -55ºC, or -60ºC.

In some embodiments, the acrylic latex polymer may be an acrylic latex polymer lacking styrene groups. In some embodiments, the acrylic latex polymer may be an acrylates/ethylhexyl acrylates copolymer, which may be commercially available from Kobo Products, Inc. and Daito Kasei Kogyo Co., Ltd., under the trade names Daitosol 5500GM and/or Daitosol 5500GX. This product may be sold as an emulsion that contains water, an ethyl methacrylates/N-butyl acrylates/2-methylhexyl acrylates copolymer (aka acrylates/ethylhexyl acrylates copolymer), and Laureth-20. Daitosol 5500GM and Daitosol 5500GX are disclosed to have a glass transition temperature of -65°C.

In some embodiments, the acrylic latex polymer may be present in amounts ranging from 5%, 10%, or 15% to about 15%, 20%, 25%, 30%, or 35% by weight of the composition, including any combination or subrange thereof.

Polyurethane adhesive

According to the present invention, compositions comprising at least one aqueous polyurethane dispersion are provided. The "aqueous polyurethane dispersion" may be the aqueous polyurethane dispersions disclosed in U.S. Patent Nos. 7,445,770 and/or 7,452,770.

More specifically, the aqueous polyurethane dispersions of the present invention are preferably the reaction products of:

A) a prepolymer according to the formula:

wherein R ₁ represents a bivalent radical of a dihydroxyl functional compound, R ₂ represents a hydrocarbon radical of an aliphatic or cycloaliphatic polyisocyanate, R ₃ represents a radical of a low molecular weight diol, optionally substituted by ionic groups, n is from 0 to 5, and m is >1;

B) at least one chain extender according to the formula: H2N-R4-NH2 in which R4 represents an alkylene or alkylene oxide radical not substituted by ionic or potentially ionic groups; and

C) at least one chain extender according to the formula: H2N-R5-NH2 in which R5 represents an alkylene radical substituted by ionic or potentially ionic groups.

Suitable dihydroxyl compounds for providing the divalent radical R ₁ include those having at least two hydroxy groups and having number average molecular weights ranging from about 700 to about 16,000, and preferably from about 750 to about 5,000. Examples of the high molecular weight compounds include polyester polyols, polyether polyols, polyhydroxy polycarbonates, polyhydroxy polyacetals, polyhydroxy polyacrylates, polyhydroxy polyester amides, polyhydroxy polyalkadienes, and polyhydroxy polythioethers. Polyester polyols, polyether polyols, and polyhydroxy polycarbonates are preferred. Mixtures of several of these compounds are also within the scope of the present invention.

Suitable polyisocyanates for providing the hydrocarbon radical R ₂ include organic diisocyanates having a molecular weight of about 112 to 1000, and preferably about 140 to 400. Preferred diisocyanates are those represented by the general formula R ₂ (NCO) ₂ , shown above, wherein R ₂ represents a divalent aliphatic hydrocarbon group having from 4 to 18 carbon atoms, a divalent cycloaliphatic hydrocarbon group having from 5 to 15 carbon atoms, a divalent araliphatic hydrocarbon group having from 7 to 15 carbon atoms, or a divalent aromatic hydrocarbon group having from 6 to 15 carbon atoms. Examples of suitable organic diisocyanates include tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, dodecamethylene diisocyanate, cyclohexane-1,3- and -1,4-diisocyanate, 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethylcyclohexane (isophorone diisocyanate or IPDI), bis-(4-isocyanatocyclohexyl)-methane, 1,3- and 1,4-bis(isocyanatomethyl)-cyclohexane, bis-(4-isocyanato-3-methyl-cyclohexyl)-methane, toluene diisocyanate (TDI) isomers, such as 2,4-diisocyanatotoluene, 2,6-diisocyanatotoluene, mixtures of these isomers, hydrogenated TDI, 4,4′-diisocyanato diphenyl methane and its isomeric mixtures with 2,4′- and optionally 2,2′-diisocyanato diphenylmethane, and 1,5-diisocyanato naphthalene. Mixtures of diisocyanates can of course be used. Preferred diisocyanates are aliphatic and cycloaliphatic diisocyanates. Particularly preferred are 1,6-hexamethylene diisocyanate and isophorone diisocyanate.

By "low molecular weight diols" in the context of R ₃ is meant diols having a molecular weight of about 62 to 700, preferably 62 to 200. They may contain aliphatic, alicyclic or aromatic groups. Preferred compounds contain only aliphatic groups. Low molecular weight diols having up to about 20 carbon atoms per molecule include ethylene glycol, diethylene glycol, propane-1,2-diol, propane-1,3-diol, butane-1,4-diol, butylene 1,3-glycol, neopentyl glycol, butyl ethyl propane diol, cyclohexane diol, 1,4-cyclohexane dimethanol, hexane 1,6-diol, bisphenol A (2,2-bis(4-hydroxyphenyl)propane), hydrogenated bisphenol A (2,2-bis(4-hydroxycyclohexyl)propane), and mixtures thereof. Low molecular weight diols may optionally contain ionic or potentially ionic groups. Suitable low molecular weight diols containing ionic or potentially ionic groups are those disclosed in U.S. Patent No. 3,412,054. Preferred compounds include dimethylol butanoic acid (DMBA), dimethylol propionic acid (DMPA), and carboxyl-containing caprolactone polyester diol. If lower molecular weight diols containing ionic or potentially ionic groups are used, they are preferably used in an amount such that <0.30 meq of COOH per gram of polyurethane in the polyurethane dispersion is present.

The prepolymer is chain-extended using two classes of chain extenders. First, compounds having the formula: H ₂ NR ₄ -NH ₂ in which R ₄ represents an alkylene radical or alkylene oxide unsubstituted by ionic or potentially ionic groups. Alkylene diamines include hydrazine, ethylenediamine, propylenediamine, 1,4-butylenediamine, and piperazine. Alkylene diamine oxides include 3-{2-[2-(3-aminopropoxy)ethoxy]ethoxy}propylamine (also known as dipropylamine diethylene glycol or DPA-DEG available from Tomah Products, Milton, Wis.), 2-methyl-1,5-pentanediamine (Dytec A available from DuPont), hexane diamine, isophorone diamine and 4,4-methylenedi(cyclohexylamine), and the DPA series of ether amines available from Tomah Products, Milton, Wis., including dipropylamine propylene glycol, dipropylamine dipropylene glycol, dipropylamine tripropylene glycol, dipropylamine poly(propylene glycol), dipropylamine ethylene glycol, dipropylamine poly(ethylene glycol), dipropylamine 1,3-propanediol, dipropylamine 2-methyl-1,3-propane diol, dipropylamine 1,4-butane diol, dipropylamine 1,3-butane diol, dipropylamine 1,6-hexane diol and dipropylamine cyclohexane-1,4-dimethanol. Mixtures of the listed diamines may also be used.

Second-class chain extenders are compounds having the formula: H ₂ NR ₅ -NH ₂ in which R ₅ represents an alkylene radical substituted by ionic or potentially ionic groups. These compounds have one ionic or potentially ionic group and two groups that are reactive with isocyanate groups. These compounds contain two isocyanate-reactive groups and one ionic group or a group capable of forming an ionic group. The ionic group or potentially ionic group may be selected from the group consisting of ternary or quaternary ammonium groups, groups convertible into such a group, a carboxyl group, a carboxylate group, a sulfonic acid group and a sulfonate group. The at least partial conversion of the convertible groups into salt groups of the type mentioned may take place before or during mixing with water. Specific compounds include diaminosulfonates, such as, for example, N-(2-aminoethyl)-2-aminoethanesulfonic acid sodium salt (ASA) or N-(2-aminoethyl)-2-aminopropionic acid sodium salt.

The polyurethane according to the invention may also include compounds which are located in each case at the chain ends and terminate said chains (chain terminations) as described in US Patent Nos. 7,445,770 and/or 7,452,770.

Preferably, the aqueous polyurethane dispersion has a viscosity of less than 2000 mPa·s at 23°C, preferably less than 1500, preferably less than 1000, including all intermediate ranges and sub-ranges.

Preferably, the aqueous polyurethane dispersion also has a solids content based on the weight of the dispersion of 20% to 60%, preferably 25% to 55% and preferably 30% to 50%, including all intermediate ranges and sub-ranges.

In some embodiments, the aqueous polyurethane dispersion is made by a process in which a copolymer or prepolymer (polyester) is reacted with a (di)isocyanate, such as a non-phenylated (di)isocyanate.

Aqueous polyurethane dispersions suitable for use in the present invention include, but are not limited to, aqueous polyurethane dispersions sold under the name BAYCUSAN® by Covestro such as, for example, BAYCUSAN® C1001 (polyurethane-34), BAYCUSAN® C1003 (polyurethane-32) and BAYCUSAN® C1004 (polyurethane-35).

Polyurethane-34 is manufactured by a process where a copolymer of hexanediol (q.v.), neopentyl glycol (q.v.), and adipic acid (q.v.) is reacted with hexamethylene diisocyanate (a non-phenylated diisocyanate). The resulting polymer is further reacted with sodium N-(2-aminoethyl)-2-aminoethanesulfonate and ethylenediamine.

Polyurethane-35 is manufactured by a process that includes reacting a polyester prepolymer consisting of adipic acid (q.v.), hexanediol (q.v.), and neopentyl glycol (q.v.) with saturated methylene diphenyl diisocyanate (q.v.). The resulting urethane polymer is further reacted with sodium N-(2-aminoethyl)-2-aminoethanesulfonate and ethylenediamine, and then dispersed in water.

In more preferred embodiments, the aqueous polyurethane dispersion includes polyurethane-34 and/or polyurethane-35. In a more preferred embodiment, the aqueous polyurethane dispersion includes or consists of polyurethane-34.

In some embodiments, the aqueous polyurethane dispersions may be present in amounts ranging from 2%, 4%, 5%, 8% or 10% to about 10%, 12%, 15%, 20% or 25% by weight of the composition, including any combination or subrange thereof.

In some embodiments, the one or more acrylic latex polymers having a low glass transition temperature and the one or more aqueous polyurethane dispersions are present in a weight concentration ratio of one or more acrylic latex polymers having a low glass transition temperature to weight concentration of one or more aqueous polyurethane dispersions that is in a range of about 1:3, 1:2.5, 1:2, 1:1.5, or 1:1, to about 1:1, 1.5:1, 2:1, 2.5:1, or 3:1. Most desirably, this ratio may be between about 1:1 and about 3:1, such as between about 1:1 and about 2:1.

SACCHARIDE ESTER OF AT LEAST ONE C2-C4 ORGANIC ACID

The cosmetic adhesive compositions of the present invention include a saccharide ester of at least one C2-C4 organic acid. The saccharide ester of at least one C2-C4 organic acid may be useful for accelerating the onset of tack. Examples of suitable saccharide esters include those soluble in C2-C4 monohydric alcohols and/or ethyl acetate. In some embodiments, the C2-C4 organic acid is or includes acetic acid and butyric acid. In some embodiments, the cellulose ester of at least one C2-C4 organic acid is or includes sucrose acetate isobutyrate (“SAIB”).

The saccharide ester of at least one C2-C4 organic acid may be, for example, sucrose acetate butyrate commercially available from Eastman Chemical such as SAIB-100.

The cellulose ester of at least one C2-C4 organic acid may be present in a concentration by weight in the topcoat nail polish composition that is from about 0.5%, 1%, 2%, 3%, or 5% to about 8%, 10%, 15%, 20%, 25%, or 30%.

Additional adhesive polymers other than the one or more acrylic latex polymers having a low glass transition temperature, the one or more aqueous polyurethane dispersions, and the one or more saccharide esters of at least one C2-C4 organic acid may be present in the cosmetic adhesive composition. Examples of other adhesive polymers include acrylate polymers having a _Tg of no more than about 20°C; polysaccharides including various gums such as xanthan gum, gellan gum, and the like; starches and starch derivatives such as sodium starch polyacrylate, cellulose and its derivatives; certain vinyl polymers such as polyvinyl acetate, and the like. In some embodiments, the additional adhesive polymer when tested according to the initial adhesive test or the dry adhesion test, both described herein, has values of at least 2, such as at least 3.

In some embodiments, the additional adhesive polymers are present at a total concentration by weight that is less than the total concentration by weight of the one or more acrylic latex polymers having a low glass transition temperature, the one or more aqueous polyurethane dispersions, and the one or more saccharide esters of at least one C2-C4 organic acid. In some embodiments, the additional adhesive polymers are present at a total concentration by weight that is less than any individual concentration by weight of the one or more acrylic latex polymers having a low glass transition temperature, the one or more aqueous polyurethane dispersions, and the one or more saccharide esters of at least one C2-C4 organic acid. In some embodiments, the cosmetic adhesive composition is substantially free of additional adhesive polymers.

Certain classes of compounds may optionally be sufficiently excluded from the cosmetic adhesive compositions of the present invention – so as to be substantially free or free of such compound(s). For example, the cosmetic adhesive composition may be free or substantially free of one, a plurality, or all of: waxes, oils, silicones, and C2-C6 polyols.

Waxes

Waxes are defined as a lipophilic compound that is solid at room temperature (25°C), with a reversible solid/liquid change of state, having a melting point of 30°C or higher, which may be up to 200°C, and in particular up to 120°C. Waxes may be soft or hard.

As used herein, the term " soft wax " refers to waxes that have a melting point below about 70°C, and preferably a melting point below about 60°C. As used herein, the term " hard wax " refers to waxes other than soft waxes – namely, waxes that have a melting point of about 70°C or higher, and preferably, a melting point of about 60°C or higher.

Non-limiting examples of soft waxes include paraffin wax, ozokerite, synthetic beeswax, beeswax, candelilla wax, hydrogenated jojoba wax, palm butter, sumac wax, polyglyceryl beeswax, siliconyl beeswax, ceresin wax, orange peel wax, silicone resin wax, alkyl dimethicone wax, Berry wax, koster wax, siliconyl candelilla wax and lignite wax.

Non-limiting examples of hard waxes include carnauba wax, microcrystalline wax, polyethylene wax, hydrogenated castor oil, AC 540 wax, hydrogenated castor wax, AC 400 wax, rice bran wax, polyethylene alcohol wax, sunflower seed wax, fischer-tropsch wax, Chinese insect wax and shellac wax.

Oils

“Oil” means any non-aqueous medium that is liquid at room temperature (25°C) and atmospheric pressure (760 mm Hg). Oils are generally insoluble in water and include a hydrophobic moiety, such as one meeting one or more of the following three criteria: (a) has an (unbroken) carbon chain of at least six carbons, such as at least seven carbons, such as at least eight carbons, in which none of the six carbons is a carbonyl carbon or has a hydrophilic moiety (defined below) directly attached to it; (b) has two or more alkyl siloxy groups; or (c) has two or more oxypropylene groups in sequence. The hydrophobic moiety may include linear, cyclic, aromatic, saturated, or unsaturated groups. The hydrophobic compound is in some embodiments non-amphiphilic and, as such, in this embodiment does not include hydrophilic moieties, such as anionic, cationic, zwitterionic, or non-ionic groups, which are polar, including sulfate, sulfonate, carboxylate, phosphate, phosphonate, ammonium, including mono-, di-, and trialkylammonium species, pyridinium, imidazolinium, amidinium, poly(ethyleneiminium), ammonioalkylsulfonate, ammonioalkylcarboxylate, amphoacetate, and poly(ethyleneoxy)sulfonyl moieties. In some embodiments, the oil does not include hydroxyl moieties. In some other embodiments, the oils have a molecular weight of less than about 800 daltons.

Suitable examples of oil compounds include vegetable oils (glyceryl esters of fatty acids, monoglycerides, diglycerides, triglycerides) and fatty esters. Specific non-limiting examples include, but are not limited to, esters such as isopropyl palmitate, isopropyl myristate, isononyl isonanoate, C ₁₂ -C ₁₅ alkyl benzoates, caprylic/capric triglycerides, ethylhexyl hydroxystearate, silicone oils (such as dimethicone and cyclopentasiloxane), pentaerythritol tetraoctanoate, and mineral oil. Other examples of oils include a liquid organic ultraviolet filter commonly used, for example, as a UV-absorbing sunscreen such as octocrylene, octyl salicylate, octyl methoxycinnamate, among others.

Suitable oils include volatile and/or non-volatile oils. These oils may be any acceptable oil, including, but not limited to, silicone oils and/or hydrocarbon oils. Examples of volatile silicone oils include linear or cyclic silicone oils having a room temperature viscosity of 6 cSt or less and having from 2 to 7 silicon atoms, such silicones being optionally substituted with alkyl or alkoxy groups of 1 to 10 carbon atoms. Specific oils that may be used in the invention include octamethyltetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethyloctyltrisiloxane, hexamethyldisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and mixtures thereof.

C2-C6 polyols

Although in some embodiments, C2-C6 polyols are included in the compositions of the present invention, in other embodiments, the composition may be substantially free of C2-C6 polyols. Non-limiting examples of C2-C6 polyols include glycerol or diols, such as 1,2-pentanediol, propanediol, butanediol, glycols and glycol ethers, such as propylene glycol, butylene glycol, dipropylene glycol or diethylene glycol.

Silicones

In some embodiments, the composition may be substantially free of silicones. By silicones is meant materials having a plurality of Si-O-R units where R may be any organic group.

Other subjects

In some embodiments, the composition may include other materials. The other materials may be present in a total amount of less than 40% and, in some embodiments, less than about 20% by weight of the composition. In some embodiments, the other materials may be present in a total amount of 25 to 35% by weight of the composition.

In some embodiments, the other materials may include one or more cosmetic ingredients selected from colorants, C2-C8 monohydric alcohols, C2-C6 polyhydric alcohols, chelating agents, antioxidants, preservatives, and surfactants. These other materials may be collectively present at a concentration by weight of about 0%, 1%, 2%, 3%, or 5% to about 5%, 10%, 15%, or 20%. In some embodiments, the compositions include C2-C4 monohydric alcohols at concentrations ranging from about 0%, 0.5%, or 1% to about 1%, 2%, 3%, 5%, or 10%.

For the purposes of this disclosure, one or more acrylic latex polymers having a glass transition temperature ( _Tg ) below about -40°C; one or more aqueous polyurethane dispersions; and one or more saccharide esters of at least one C2-C4 organic acid – are excluded from the definition of “other materials,” even though such adhesive polymers would still meet the functional definition of one or more of these ingredient classes.

Dyes

The compositions of the present invention may further optionally comprise at least one colorant. Suitable colorants (coloring agents) include any colorant typically found in cosmetic compositions. Suitable colorants include, but are not limited to, lipophilic dyes, pigments and pearlescent agents, and mixtures thereof.

Suitable examples of fat-soluble dyes are, for example, Sudan Red, DC Red 17, DC Green 6, β-carotene, soybean oil, Sudan Brown, DC Yellow 11, DC Violet 2, DC Orange 5 and Quinoline Yellow.

Suitable pigments may be white or colored, inorganic and/or organic, and coated or uncoated. Examples include inorganic pigments such as titanium dioxide, optionally surface-treated, zirconium or cerium oxides and iron or chromium oxides, manganese violet, ultramarine blue, chromium hydrate, and ferric blue. Organic pigments also include carbon black, D&C type pigments, and lakes based on cochineal carmine or barium, strontium, calcium, or aluminum, such as D&C Red Nos. 10, 11, 12, and 13, D&C Red No. 7, D&C Red Nos. 5 and 6, and D&D Red No. 34, and lakes such as D&C Yellow Lake No. 5 and D&C Red Lake No. 2.

Suitable pearlescent pigments may be selected, for example, from white pearlescent pigments, such as mica coated with titanium oxide or bismuth oxychloride, colored pearlescent pigments, such as mica coated with titanium oxide with iron oxides, mica coated with titanium oxide with in particular ferric blue or chromium oxide, or mica coated with titanium oxide with an organic pigment of the aforementioned type, and pearlescent pigments based on bismuth oxychloride.

The colorant may be present in an amount sufficient to provide color to the eyelashes. In some embodiments, the colorant may be present in a total amount of 0.1% to 20% by weight of the composition. In some embodiments, the colorant may be present in a total amount ranging from 0%, 0.1%, 0.5%, 1%, 2%, 3%, 4%, or 5% up to 10%, 12.5%, or 15% by weight of the composition, including any combination or subrange thereof.

C2-C8 monoalcohols

In some embodiments, the composition may include one or more C2-C8 monohydric alcohols, such as C3-C4 monohydric alcohols. In some embodiments, a single C2-C8 monohydric alcohol is used. In some embodiments, the C2-C8 monohydric alcohol is a C2-C8 monohydric alkanol.

Non-limiting examples of C2-C8 monohydric alcohols include ethanol and isopropanol. If the C2-C8 monohydric alcohol is ethanol, the C2-C8 monohydric alcohol includes any denaturant used to denature ethanol. In some embodiments, the C2-C8 monohydric alcohol is a denatured alcohol.

In some embodiments, the C2-C8 monohydric alcohol may be present in a total amount of from 0.1% to 5% by weight of the composition. In some embodiments, the C2-C8 monohydric alcohol may be present in a total amount of from 0.1%, 1.5%, 2% or 3% up to 4%, 4.5% or 5% by weight of the composition, including any combination or subrange thereof.

Thickening agent

In some embodiments, the composition may include a thickening agent. In some embodiments, the composition includes a single thickening agent. In some embodiments, the composition includes a plurality of thickening agents.

In some embodiments, the thickening agent may be a naturally occurring polymer. Non-limiting examples of naturally occurring polymers useful as a thickening agent include thickening polymers comprising at least one sugar unit, e.g., non-ionic guar gums, optionally modified with C1-C6 hydroxyalkyl groups; microbially derived biopolysaccharide gums, such as scleroglucan gum or xanthan gum; gums derived from plant exudates, such as gum arabic, gum ghatti, gum karaya, gum tragacanth, carrageenan, agar gum, and locust bean gum; pectins; alginates; starches; hydroxy(C1-C6 alkylcelluloses) and carboxy(C1-C6 alkylcelluloses).

In some embodiments, the thickening agent may be a cellulose thickener. Non-limiting examples of cellulose thickeners include hydroxyethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, methylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, starches such as sodium starch polyacrylate, and mixtures thereof.

In some embodiments, the thickening agent may be present in a total amount of 0%-10% by weight of the composition. In some embodiments, the thickening agent may be present in a total amount ranging from 0.1%, 0.25%, or 0.5% up to 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, or 10% by weight of the composition, including any combination or subrange thereof. In some embodiments, the thickening agent may be present in a total amount of 0.1%-2% by weight of the composition. In some embodiments, the composition may be free or substantially free of a thickening agent.

Surfactants/emulsifiers

In some embodiments, the composition may include one or more surfactants. In some embodiments, the composition may include a plurality of surfactants. As will be recognized by those skilled in the art, surfactants and emulsifiers are generally amphiphilic molecules and capable of reducing the surface tension of deionized water to levels below about 30 dynes/cm.

In some embodiments, the composition is free or substantially free of cationic surfactants or entirely free of surfactants.

In some embodiments, the composition may include one or more anionic surfactants. Examples include alkali metal or other salts such as sodium salts, ammonium salts, amine salts, amino alcohol salts, and alkaline earth metal salts, e.g., magnesium salts, of the following types of compounds: alkyl sulfates, alkyl ether sulfates, acyl isethionates, acyl glycinates, acyl taurates, acyl amino acids, acyl sarcosinates, sulfosuccinates, sulfonates, wherein the alkyl and acyl groups of all of these compounds comprise from 6 to 24 carbon atoms (saturated or unsaturated, linear or branched).

In some embodiments, the composition may include one or more nonionic surfactants. Non-limiting examples of nonionic surfactants include alkoxylated derivatives of the following: fatty alcohols, alkylphenols, fatty acids, fatty acid esters such as sorbitan fatty acid esters, and fatty acid amides, wherein the alkyl chain is in the range of C12-C50, preferably in the range of C16-C40, more preferably in the range of C24 to C40, and having from about 1 to about 110 alkoxy groups. The alkoxy groups may be selected from the group consisting of C2-C6 oxides and mixtures thereof, with ethylene oxide, propylene oxide, and mixtures thereof being preferred alkoxides. The alkyl chain may be straight, branched, saturated, or unsaturated. Alkoxylated alcohols can be used alone or in mixtures thereof.

Antioxidants, chelating agents and preservatives

In some embodiments, the composition may include an antioxidant, a chelating agent, and/or a preservative. In some embodiments, the composition may be free or substantially free of an antioxidant, a chelating agent, and/or a preservative. The optional antioxidant, a chelating agent, and/or a preservative may be selected from commonly used cosmetic examples of these functional materials.

In some embodiments, a method may be provided. The method includes applying a composition described herein to natural eyelashes or eyebrows and/or false eyelashes (strip, tuft, etc.), false eyebrows, or fibers to be adhered to an area of natural eyelashes or eyebrows. The term “eyelashes/eyebrows” is used herein to refer to eyelashes, eyebrows, or both. The false eyelashes, eyebrows, or fibers may then be positioned to form an augmented eyelash or eyebrow structure.

In some aspects, a method of adhering a false eyelash or eyebrow includes

(1) applying the above-described composition to a surface selected from an eyelash or an eyebrow to form an active adhesive surface. It further includes (2) contacting the active adhesive surface with a corresponding mating surface of an eyelash or eyebrow to form an augmented eyelash or eyebrow on the user. For example, the adhesive composition may be applied to a false eyelash, and then the active adhesive surface of the false eyelash may be attached to a corresponding natural eyelash to form an augmented eyelash. Similarly, the adhesive may be applied to a false eyebrow, creating an active adhesive surface, and then the same is attached to a corresponding natural eyebrow to form an augmented eyebrow. Alternatively, the adhesive may be applied to a natural eyelash forming an active adhesive surface thereon and the same is then contacted with a corresponding false eyelash to be attached thereto. Similarly, the adhesive may be applied to a natural eyebrow, and then a corresponding false eyebrow (or fibers) may be attached to the natural eyebrow. In other embodiments, the cosmetic adhesive composition is applied to a skin surface such as the skin of the eyelid or the skin of the eyebrow area.

EXAMPLES Example 1

Three raw materials, an acrylic latex polymer having a glass transition temperature ( _Tg ) below about -40°C (acrylates/ethylhexyl acrylate copolymer, 55% active in water), an aqueous polyurethane dispersion (polyurethane-34, 32% active in water), and a saccharide ester of at least one C2-C4 organic acid (sucrose acetate isobutyrate, 90% active in alcohol) were separately evaluated for the following characteristics: initial tack, dry tack, and cohesion—which the inventors found to be characteristic of the high-performance, all-day eyelash adhesive: (1) initial tack (wet), (2) dry tack, and (3) cohesion. These tests are described below.

Initial Adhesion (Wet) Assessment

A droplet of each composition was placed on dry skin and spread until uniform. The deposit was monitored to ensure it was sufficiently dry to assess tackiness. When the deposit became transparent ( i.e., at the beginning of the deposit drying period), the tackiness was qualitatively rated from 1 to 5 (1 = low/slight tackiness, 5 = very tacky), by pressing the deposit with a finger and pulling the finger upward, and measuring the force required to separate the fingers. Ratings are assigned as follows: one (1) was defined as a composition with extremely low initial tackiness (little or no adhesion to the finger at any time during drying/just dry) - an example is polyurethane-6, available as LUVISET Si-PURA, available from BASF. One (3) was defined as a film with intermediate peel strength from a weigh boat; An example is the commercial glue Ardell Brush-On Eyelash Adhesive (ingredients: alcohol, water, acrylate copolymer, sorbitol). A (5) was defined as a composition with very high initial tack (high adhesion to the finger, to the point where it is difficult to remove the finger from the film). An example is the acrylates/ethylhexyl acrylate copolymer, Daitosol 5500GX.

Dry Adhesion Assessment

Approximately 7 g of each composition was poured into a polystyrene weighing boat and allowed to dry overnight under ambient conditions or under a fume hood. The adhesion of the dried composition to the weighing boat was qualitatively rated from 1 to 5 (1 = low adhesion, 5 = high adhesion) by removing the film from the weighing boat, by measuring the force required to remove the film from the surface of the weighing boat. The ratings are assigned as follows: one (1) was defined as a film that could be removed from the weighing boat with little or no force, an example is sucrose acetate isobutyrate; one (5) was defined as a film that was very difficult to remove from the weighing boat. An example is polyurethane-34.

Cohesion Assessment

Approximately 7 g of each composition was poured into a weigh boat and allowed to dry overnight under ambient conditions or under a fume hood. The cohesion of the dried composition was qualitatively rated from 1 to 5 (1 = low cohesion, 5 = high cohesion) by removing a segment of film from the weigh boat and measuring the force required to create a break or tear in that segment. Ratings are assigned as follows: one (1) was defined as a film that could be torn very easily. An example is sucrose acetate isobutyrate; one (5) was defined as a film that was extremely difficult to tear, an example is polyurethane-34.

Evaluation Drying Time

Drying time was determined by monitoring the visual transition from white to transparent of the film on the skin.

The test results for Example 1 are shown below.

[Table 1]

Table 1: Comparative Formulas (raw materials) Ingredients C1 C2 C3 Acrylates/ethylhexyl acrylate copolymer 55% Polyurethane-34 32% Sucrose acetate isobutyrate 90% Initial adhesion 5 2 4 Dry adhesion 4 5 1 Cohesion 2 5 1

The results show that none of the three components has sufficient performance in all three properties.

Example 2

The following formulations were produced by one of the following processes: (A), (B) or (C). (A) Combining all the components described below by rapid mixing using a Hauschild SpeedMixer® at 2000-2500 rpm for up to 5 minutes, at room temperature, (B) Mixing all the components together on a Rayneri mixer at room temperature using a Cowles blade, or (C) A close variation of process “B”, but suitable for compositions without alcohol as a co-solvent, for improved dispersion of sucrose acetate isobutyrate. (C) Including combining all the oil-soluble components in a first vessel, heating and mixing until homogeneous; combining the remaining components in a second vessel, heating and mixing until homogeneous; combining the vessels together, homogenizing, cooling and pouring the mixtures into a suitable product container. The particular process used for each composition, along with the ingredients in percentage by weight, are noted in Table 2 below.

[Table 2]

Table 2: Comparative Formulas
(sucrose acetate isobutyrate + polyurethane-34)
C4
(Fla 1P) C5
(Fla 2P) C6
(Fla 3P) C7
(Fla 4P) C8
(Fla 5P) C9
(Fla 6P) Sucrose acetate isobutyrate (SAIB) 5% 5% 10% 20% 30% 50% Polyurethane-34 30.22% 20% 10% 5% 5% 5% Water 62.81% 73.50% 78.42% 72.55% 61.44% 39.22% Emulsifiers 0.56% 0.56% 1.11% 2.22% 3.33% 5.56% Conservatives 1.41% 0.94% 0.47% 0.23% 0.23% 0.23% Process used C C C C C C Initial adhesion 1.5 1.5 3 3 3 3 Dry adhesion 3 2 2 2 2.5 1 Cohesion 4.5 4 4 2 2.5 1.5 Drying time (s) 90-100 90-100 80-90 80-90 60-80 60-80

The results in Table 2 show that when the aqueous polyurethane dispersion and the saccharide esters of at least one C2-C4 organic acid are used without the acrylic latex polymer having a glass transition temperature ( _Tg ) below about -40 °C, at least the initial adhesion and dry adhesion are unacceptably low. In some cases (Comparative Examples, C4 and C5), the initial adhesion of the mixture is even worse than the poor initial adhesion of the polyurethane dispersion alone (see Example 1). C4, C5, C6, and C7 were also found to have stability problems. Surprisingly, however, SAIB at higher concentrations was found to accelerate the onset of tack/adhesion.

Example 3

The following formulas have been produced and tested.

[Table 3]

Table 3: Comparative Formulas (polyurethane-34 + acrylate/ethylhexyl acrylate copolymer) Ingredients C10
(Fla 13P) C11
(Fla 15P) C12
(Fla 16P) C13
(Fla 19P) C13
(Fla 14P) Acrylates/ethylhexyl acrylate copolymer 3.03% 5% 20.35% 30.25% 46.4% Polyurethane-34 27.2% 20% 20.16% 7.36% 5% Water 68.47% 74.01% 58.36% 61.77% 47.94% Conservatives 1.3% 0.99% 1.13% 0.62% 0.66% Process used HAS HAS HAS HAS HAS Initial adhesion 2 2.5 5 4 4.5 Dry adhesion 4.5 4.5 5 4 2 Cohesion 4 4 5 3 1.5 Drying time (s) 90-120 90-120 90-120 90-120 90-120

The results in Table 3 show that when the acrylic latex polymer having a glass transition temperature ( _Tg ) below about -40 °C and the aqueous polyurethane dispersion are used without the saccharide esters of at least one C2-C4 organic acid, it is possible to achieve a good balance of properties (see C12) if the concentrations of the acrylic latex polymer having a glass transition temperature ( _Tg ) below about -40 °C and the aqueous polyurethane dispersion are not too different from each other. However, it was observed that C12 had an unacceptably long drying time (greater than 90 seconds).

Example 4

The following formulas have been produced and tested.

[Table 4]

Table 4: Comparative Formulas (acrylates/ethylhexyl acrylate copolymer + sucrose acetate isobutyrate) Ingredients C 14
(Fla 7P) C 15
(Fla 28P) C 16
(Fla 11P) Acrylates/ethylhexyl acrylate copolymer 50% 45.82% 4.95% Sucrose acetate isobutyrate 5% 15.03% 50% Water 44% 37.07% 39.46% Emulsifiers 0.56% — 5.56% Alcohol — 1.67% — Conservatives 0.44% 0.41% 0.03% Process used C HAS C Initial adhesion 3.5 3 2 Dry adhesion 5 3 1.5 Cohesion 1.5 3 2 Drying time (s) 80-90 80-90 80-90

The results in Table 4 show that when the acrylic latex polymer having a glass transition temperature (T _g ) below about -40°C and the saccharide esters of at least one C2-C4 organic acid are used without the aqueous polyurethane dispersion, the initial adhesion is worse than the initial adhesion for either raw material alone (see Example 1).

Example 5

The following formulations using each of three of acrylic latex polymer having a glass transition temperature (T _g ) less than about -40°C, aqueous polyurethane dispersion, and saccharide esters of at least one C2-C4 organic acid were prepared and tested.

[Table 5]

Table 5 (Inventive and comparative formulas)

Ingredients Ex 1
(Fla 34) Ex 2
(Fla 11B) Ex 3
(Fla 17P) C 1
(Fla 18P) C 2
(Fla 11G) Sucrose acetate isobutyrate 30% 6.8% 30% 13.5% 6.80% Polyurethane-34 10.7% 18.6% 10% 13.36% 14.58% Acrylates/ethylhexyl acrylate copolymer 18.3% 18.5% 10% 22.96% 25.05% Water 36.96% 53.56% 46.1% 46.34% 50.56% Emulsifiers — 0.75% 3.3% 1.5% 0.75% Alcohol 3.34% 0.75% — 1.5% 0.755% Conservatives 0.7% 0.97% 0.6% 0.84% 1.5% Thickening — 0.07% — — — Process used HAS B C HAS HAS Initial adhesion 5 4 4 4 4 Dry adhesion 5 4 4 3 5 Cohesion 5 4 4 3 2.5 Drying time (s) 60-80 60-80 80-90 80-90 60-80

The results in Table 5 show that when each of the three acrylic latex polymer having a glass transition temperature (Tg) below about -40°C, aqueous polyurethane dispersion, and saccharide esters of at least one C2-C4 organic acid are included and the weight concentration ratio of acrylic latex polymer having a glass transition temperature ( _Tg ) below about -40°C to aqueous polyurethane dispersion is 1:3 to 3:1, and about 10% to 20% by weight of acrylic latex polymer having a glass transition temperature ( _Tg ) below about -40°C, a surprisingly very good balance of adhesive/cohesive properties was obtained, with an acceptable drying time.

Those skilled in the art will recognize or be able to determine, using only routine experimentation, numerous equivalents to the specific embodiments of the invention described herein. These equivalents are intended to be encompassed by the following claims.

Claims (10)

Cosmetic adhesive composition comprising:
– water;
– from about 10% to 20% by weight of one or more acrylic latex polymers having a glass transition temperature (Tg) below about -40°C;
– one or more aqueous polyurethane dispersions;
– one or more saccharide esters of at least one C2-C4 organic acid; wherein the one or more acrylic latex polymers having a low glass transition temperature and the one or more aqueous polyurethane dispersions are present in a weight concentration ratio of the one or more acrylic latex polymers having a low glass transition temperature to weight concentration of the one or more aqueous polyurethane dispersions which is in a range of about 1:3 to about 3:1. The composition of claim 1, wherein the one or more acrylic latex polymers having a low glass transition temperature and the one or more aqueous polyurethane dispersions are present in a ratio of weight concentration of the one or more acrylic latex polymers having a low glass transition temperature to weight concentration of the one or more aqueous polyurethane dispersions that is in a range of about 1:1 to about 2:1. A composition according to any preceding claim, wherein the one or more acrylic latex polymers having a glass transition temperature (T _g ) less than about -40°C have a T _g less than about -50°C. A composition according to any preceding claim, wherein the one or more aqueous polyurethane dispersions are formed by reacting a polyester prepolymer with a non-phenylated isocyanate. A composition according to any preceding claim, wherein the composition is substantially free of one or more waxes, oils, silicones and/or C2-C6 polyols. A composition according to any preceding claim, wherein the composition is substantially free of each of the waxes, oils, silicones and C2-C6 polyols. The composition of any preceding claim, wherein the composition optionally includes one or more additional adhesive polymers, and wherein the total concentration by weight of the one or more acrylic latex polymers having a glass transition temperature (T _g ) less than about -40°C; the one or more aqueous polyurethane dispersions; the one or more saccharide esters of at least one C2-C4 organic acid, and the one or more additional adhesive polymers is in a range of about 30% to about 70%. A composition according to any preceding claim, wherein one or more aqueous polyurethane dispersions is (are) present in the composition in a concentration by weight of about 8% to about 20% of the composition. A composition according to any preceding claim, wherein one or more saccharide esters of at least one C2-C4 organic acid is (are) present in an amount of from 5% to about 30% by weight of the composition. A method of adhering a false eyelash/eyebrow to a corresponding natural eyelash/eyebrow, comprising
– applying the composition according to any one of the preceding claims to a surface chosen from the false eyelash/eyebrow, the corresponding natural eyelash/eyebrow, a skin surface or combinations thereof to form at least one active adhesive surface; and
– contacting the at least one active adhesive surface with a corresponding coupling surface to form an augmented eyelash/eyebrow.