MXPA99006517A - Cleansing composition with separately dispensed cleansing base and benefit base wherein benefit base also comprises surfactant - Google Patents

Abstract

An aqueous liquid cleansing and moisturizing composition comprising a base formulation and an additive formulation in which the base formulation and additive formulation are separate but combinedly dispensable from a single packaging means in a predetermined ratio as discrete domains. By adding some surfactant to additive formulation stripe, enhanced lather is obtained. Further, some surfactant is assured, even if there is uneven pumping. Finally, greater consumer control of surfactant of moisturizer levels is afforded.

Description

CLEANING COMPOSITION WITH BASE CLEANER AND BASE BENEFIT DISPENSED SEPARATELY WHERE THE BASIS OF BENEFIT ALSO UNDERSTANDS A SURFACTANT.

FIELD OF THE INVENTION.

The present invention relates to detergent compositions suitable for topical application for cleaning and improving the condition of the human body, particularly for moisturizing skin, hair, nails and other epithelial tissues, including mucous membranes. In particular, it relates to compositions which are formulated the same to give a gentle cleansing and to condition the skin.

BACKGROUND OF THE INVENTION.

Compositions that provide both a cleansing function and a humectant benefit are known. For example, WO 90/13283 discloses compositions comprising acyl ester of an isethionic acid salt, a long chain fatty acid, a humectant component and optional soap.

A problem that has previously been encountered with such dual-purpose compositions is that they contain an insufficient level of humectant components; or an insufficient amount of deposits in use.

Another problem associated with such dual cleaning and wetting compositions is instability. According to WO 94/03152 concerning bath gels comprising a non-soap detergent, silica oil and cationic polymers, the maximum average size of the droplets of silica oil that can be used is 2 microns, if it is desired to maintain the stability of the product.

In pending applications of the applicant serial number U.S. 08 / 475,145, filed on June 07, 1995 and now allowed, the applicant found that intensified deposition of a benefit agent could be obtained in a stable formulation by using a dual cleansing and moisturizing product in which the cleansing and wetting components are dispensed separately but in combination from a packaging means such as discrete / fringed domains.

More specifically, the compositions of that reference comprise a surfactant containing a base formulation and a benefit agent wherein the benefit agent and the base formulation were physically stopped (not in direct contact) but were nevertheless dispensed from a single medium of packaging comprising both the base formulation and the benefit agent as individual fringes. The strips have a width of at least 1000 microns and the fringes of the base formulation and the benefit agent were not post-mixed before use (compared to Unilever EP 468,703 where the subsequent mixing is required). The present invention relates to the same dual cleanser / humectant compositions separately dispensed, not mixed before use described in U.S. series number 475,145, except that the benefit agent strip has been modified so that it can now include a surfactant.

More specifically, U.S. series number 475,145 suffered from several deficiencies which the present invention exceeds. First, the compositions of that reference, when dispensed dually, did not foam as well as the compositions of the present invention. In addition, if a person should pump the fringes from the dispenser separately, or in an uneven manner, they could end up with a composition that does not contain any surfactant. This can not occur in the present invention where both strips contain at least some surfactant. Finally, by adding a surfactant to the benefit agent strip, the present invention allows the user a greater degree of control over exactly how much cleaner they desire (ie, the benefit cleaning agent having more humectant and less cleaner than the first range containing surfactant).

Unexpectedly and suddenly, the applicants have found that, by adding some surfactant to the benefit agent fringes, they can (1) reinforce the total foam; (2) significantly improve the problems associated with inarverted and non-uniform scoring; and (3) add control for the user on how much or how little cleaner is dispensed.

More specifically, the present invention comprises an aqueous liquid cleaning and wetting composition comprising: (a) from 10 to 99.9% by weight, preferably from 30 to 70% by weight of the total product of a base formulation comprising from 1% to 35% by weight. % by weight of a base formulation of a surface active agent selected from a group consisting of anionic, nonionic, amphoteric / zwitterionic and cationic surfactants and mixtures thereof; water balance and other optional ingredients (for example, cationic polymers, perfumes, thickeners, opacifiers, etc.); and (b) from 0.1% to 90% by weight, preferably from 30% to 70% by weight of the total product of an additive formulation comprising: (i) from 1% to 80% by weight, preferably from 5% to 60% by weight of an additive composition (ie, "containing-the benefit" formulation) comprising the benefit agent; (ii) from 0.1 to 20% by weight, preferably from 5% to 20% by weight of the additive formulation comprising a surfactant selected from the group consisting of surfactants and anionics, non-ionics, amphoteric / zwitterionic and cationic and mixtures thereof; and (iii) Water balance and optional ingredients (eg, perfume, thickeners, • opasifiers, cationics, polymers, etc.) where the additive formulation and the base formulation are physically separated so that the formulations are not in direct contact with one another. with another (that is, they are physically separate), but are nevertheless dispensed from an individual packing medium comprising both the base formulations and the additive formulations as individual fringes; wherein each strip comprises either the additive formulation containing the benefit or such base formulation; wherein each strip has a width of at least 1000 microns; and where (a) and (b) are not post-mixed before use.

DESCRIPTION The present invention relates to aqueous liquid cleaning and wetting compositions comprising: (a) A base formulation comprising a surface active agent selected from the group consisting of anionic (including soap), non-ionic, amphoteric / zwitterionic and cationic surface active agents and mixtures thereof; and water balance and optional; and (b) An additive formulation comprising: (i) A benefit agent; (ii). An additional surfactant; and (iii) Balance and optional water; wherein the fringe of the additive formulation and the fringe of the base formulation are physically separated but dispensable in combination from a single packing medium in a proportion determined as discrete domains, domains having a dimesion of at least about 1000 microns.

An advantage of the present invention is that it leads to an improved sudsing. While not wishing to be limited by theory, this is thought to be due to the foaming effect of the surfactant in the additive fringe. A second advantage is the ability to allow the user to obtain the cleaner / surfactant from any pump, even if the consumer inadvertently (or purposely) pressed only one side of the pump. Finally, by allowing the consumer to select from two different concentrations of the cleaner, the consumer is in much more control of exactly how much cleaner he wants to use.

The base formulation and the additive formulation (comprising the benefit agent) are dispensed from a single packing medium in a predetermined ratio according to the use for which the composition is projected. An advantage of dispensing the fringe of the base formulation and the additive fringe (containing the benefit agent) in combination, is that it avoids the disadvantage of having to post-mix the two components. This is particularly advantageous when the separate components of the composition need to be mixed in precise proportions to achieve the desired effect.

The discrete domains of the composition of the invention can be considered as separate strips of the base formulation and the additive formulation.

The composition is convenient for cleaning and "wetting", conditioning "or" protecting "the skin.

ADDITIVE STRIP The benefit agent of the additive fringe is included in the composition to moisturize, condition and / or protect the skin. By "benefit agent" is meant a substance that softens the skin (stratum corneum) and keeps it soft by slowing down its water content and / or protecting the skin.

Preferred benefit agents include: (a) silicate oils, gums and modifications thereof, such as linear or cyclic polydimethylsiloxanes, amino, alkylaryl aryl and aryl silicate oils; (b) Fats and oils including natural oils and fats such as jojoba oil, soybean, sunflower, rice bran, avocado, almond, olive, sesame, persic, castor, coconut and mink; cocoa fat, bait, butter; hardened oils obtained by hydrogenation of the aforementioned oils; and mono, di and trilicellides such as glyceride of milic acid and 2-ethylhexanoic acid glyceride; (c) Waxes such as carnauba, spermaceti, beeswax, lanolin and derivatives thereof; (d) Hydrophobic plant extracts; (e) Hydrocarbons such as liquid paraffins, petroleum jelly, microcrystalline wax, ceresin, squalene, squalane and mineral oil; (F) higher fatty acids such as lauric, myristic, palmititico, stearic, behenic, oleic, linoleic, linolenic, lanolic, isostearic and poly-unsaturated (PUFA) fatty acids acids; (g) High alcohols such as alcohol, lauryl, cetyl, sterile, oleyl, behenyl, cholesterol and 2-hexanodecanol; (H) esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, dicerol monostearate, glycerol distearate, glycerol tristearate, - alkyl lactate (for example lauryl lactate), alkyl citrate and alkyl tartrate; (I) essential oils such as fish oils, mentha, jasmine, camphor, white cedar, orange peel sour, ryu, turpentine, cinnamon, bergamonta, citric unshiu, calamus, pine, lavender, spurge laurel, clove, hiba, eucalyptus, lemon, star flower, cumin, peppermint, rose, sage, menthol, cineole, eugenol, citral, citronella, borneol, linalool, geraniol, primarosa, camphor, thymol, spirantol, pinene, limonene, or terpentoides; (j) Lipids such as cholesterol, ceramides, sucrose esters, pseudo-ceramides, such as those described in the Specification in European Patent Number 556.97; (k) Vitamins such as vitamin a and e, alkyl esters vitamins including vitamin c alkyl esters, (1) Sunscreens such as octyl methoxyl cinnamate (Parsol MCX) and butyl methoxy benzoylmethane (Parsol 1789); (m) Phospholipids; (n) Moisturizers such as glycerin, propylene glycol and sorbitol; and (o) Mixtures of any of the above components.

Where adverse interactions between the benefit agent and the surfactant active are likely to be particularly acute, the benefit agent can be incorporated into the compositions of the invention in a vehicle.

Such benefit agents include lipids; alkyl lactates; sun filters; esters such as isopropyl palmitate and isopropyl myristate; and vitamins. For example, the carrier can be a silicate or hydrocarbon oil that is not solubilized / micellised by the active surface phase and in which the benefit agent is relatively soluble.

Particularly preferred benefit agents include silicate oils, gum and modifications thereof, esters such as isopropyl palmitate and myristate and alkyl lactates, and vegetable oils such as sunflower seed oil.

The benefit agent may be provided in the form of an emulsion.

The benefit agent of the invention can also function as a vehicle for delivering the efficacy agents to the skin treated with the compositions of the invention. This route is particularly useful for distributing efficacy agents that are difficult to deposit on the skin or those that suffer deleterious interactions with other components in the composition. In such cases the carrier is often a silicate or hydrocarbon oil that is not solubilized / micellized by the active surface phase and in which the efficacy agent is relatively soluble. Examples of such efficacy agents include anti-viral agents; hydroxycaprilic acids; pyrolidone; carboxylic acids; 3, 4, 4 '-trichlorodiphenylurea; benzoyl peroxide; perfumes; essential oils; bactericides and insect repellents such as 2,4,4'-trichloro-2'-hydroxydiphenyl ether (Irgasan DP300); salicylic acid; Willow extract, N, N-dimethyl m-toluamide (DEET); and mixtures of these.

The benefit agent preferably comprises from 1 to 80% of the additive formulation, preferably from 5 to 60% of the additive composition.

As seen. in the examples, the use of superfactants greatly allows an improved lathering of the entire composition.

The active surface agent used in the additive fringe can be selected from any known surface agent suitable for topical application to the human body. Gentle surfactants, that is, surfactants that do not damage the stratum corneum of the outer layer of the skin, are particularly preferred.

A preferred anionic detergent is the fatty acyl isethionate of the formula: RC02CH2CH2S03M wherein R is an alkyl or alkenyl group of 7 to 21 carbon atoms and M is a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium. Preferably at least three. Quarters of the RCO groups have 12 to 18 carbon atoms and can be derived from coconut, palm or a coconut / palm mixture. Another preferred anionic detergent is alkyl ether sulfate of the formula: RO (CH2CH2Q) nS03M wherein R is an alkyl group of 8 to 22 carbon atoms, n goes from 0.5 to 10 especially from 1.5 to 8, and M is a cation solubilizer as before.

Other possible anionic detergents include alkyl glyceryl ether sulfate, sulfosuccinates, taurates, sarcosinates, sulphoacetates, alkyl phosphate, alkyl phosphate ester and acyl lactylate, alkyl glutamates and mixtures thereof.

The sulfosuccinates can be monoalkyl sulfosuccinates having the formula: R502CCH2 CH (S03M) C02M; and amido-MEA sulfosuccinates of the formula: R5CONHCH2CH202CCH2CH (SO3M) CO2M; wherein R5 averages from C8-C20 alkyl; preferably C? 2-Cls alkyl and M is a solubilizing cation.

Sarcosinates are generally indicated by the formula: R5CON (CH3) CH2C02M, wherein R5 averages from C8-C20 alkyl, preferably C2- C15 alkyl, and M is a solubilizing cation.

Taurates are generally identified by the formula: R5CONR6CH2CH2S03M, wherein R5 averages from C8-C20 alkyl, preferably C2- C5 alkyl, Rs averages from C4-4 alkyl, and M is a solubilizing cation.

Rough surfactants such as primary alkane sulfonate or alkyl benzene will generally be avoided.

Suitable non-ionic surface active agents include alkyl polysaccharides, lactobionamides, ethylene glycol esters, glycerol monoethers, polyhydroxyamides (glucamide), primary and secondary alcohol ethoxylates, especially the ethoxylates of C8-20 aliphatic alcohols with an average of 1 to 20 moles of ethylene oxide per mole of alcohol.

If the active surface agent comprises soap, the soap is preferably derived from materials with a carbon chain substantially saturated with C8 to C22 and, preferably, is a potassium soap with a carbon chain of C12 to C? 8.

Suitable surfactants which may be used also include zwitterionic detectors which have an alkyl or alkenyl group of 7 to 18 carbon atoms and comply with a global structural formula: O R " R [-C-NH. { CH2) m -l -N-X-Y RJ Where R1 is an alkyl or alkenyl of 7 to 18 carbon atoms R2 and R3 are each alkyl, hydroxyalkyl or carboxyalkyl of 1 to 3 carbon atoms; m is 2 to 4; n is 0 or 1; X is an alkylene of 1 to 3 carbon atoms optionally substituted with hydroxyl; Y And it's -C02 S03 Zwitterionic detegiants within the above general formula include simple betaines of the formula: R3 R1 -N + - CH2C02 ' RJ and amino betaines of formula: R I Rx - CONH (CH2) ra - N + - CH2C02" where m is 2 or 3 In the two formulas R1, R2, and R3 are as defined above. R1 could, in particular, be a mixture of C ?2 alkyl and Ci4 groups derived from coconut so that at least half, preferably at least three quarters, of the group R1 has from 10 to 14 carbon atoms. R2, and R3 are preferably methyl.

Another possibility is a sulfobetaine of formula: R ' R1 N + (CH2) 3S03- RJ R " R1 - CONH (CH2) m - N + - (CH2) 3S03 ~ RJ where m is 2 or 3, or variants of these in which (CH2) 3S03 ~ is replaced by OH I -CH2CHCH2S03" In these formulas R1, R2, and R3 are as defined above.

Mixtures of any of the above surface active agents can also be used.

The active surface agent is preferably present at a level of 0.1 to 20% by weight, preferably 5 to 20% by weight of the additive strip formulation.

Thickeners can also be added to the additive strip formulation to achieve the viscosity required during use. Preferred thickeners for the benefit agent include silica in vapor; polyethylene; alkyl silicate wax; Aluminum silicate; lanosterol; natural and synthetic waxes; fatty acids- and derivatives of these, in particular monoglyceride polyglycol ethers of fatty acids; high fatty alcohols; petrolatum; narogel; polyammonium stearate; hydrotalcites; and mixtures of these.

Some materials can function the same as a benefit agent and as a thickener. For example, it will be understood that where the composition comprises two or more benefit agents, one of the benefit agents may also function as a thickening agent.

Additional examples of structuring and thickeners are provided in the International Dictionary of Ingredientee Cosméticos, 5th Edition, 1993, published by CTFA (The Cosmetic, Toiletry &Fragrance Association).

The balance of the additive strip will include water and optionals such as perfumes, opacifiers, cationic polymers, etc., FRAME OF BASIC FORMULATION The fringe of the base formulation may include any of the surfactants (or mixture of surfactants) described for use in the fringe of the "additive" formulation discussed above. In addition, a structurant can be added to the composition of the base formulation. Suitable materials include expandable clays, for example laponite; fatty acids and derivatives thereof, in particular, polyglycol ethers monoglyceride of fatty acids; crosslinked polyacrylates such as Carbopol (TM) (polymers available from Goodrich); the acrylates and copolymers thereof; polyvinylpyrrolidone and copolymers thereof; polyethyleneimines; salts such as sodium chloride and ammonium sulfate; sucrose ester; gelatins; and mixtures of these.

Of the clays, particularly preferred are the synthetic hectorite clay (laponite) used together with an electrolyte salt capable of causing the clay to thicken. Suitable electrolytes include alkali and alkaline-terrestrial salts such as halides, ammonium salts and sulfates.

The base formulation may also comprise a thickener (or slimming agent), i.e., a material that maintains the viscosity of this phase while the stress index increases during use. Suitable materials include crosslinked polyacrylates such as Carbopol (TM) (polymers available from Goodrich); natural gums including alginates, guar, xanthan and derivatives of polysaccharides including carboxymethyl cellulose and guar hydroxypropyl; propylene glycol and propylene glycol oleates; salts such as sodium chloride and ammonium sulfate; glycerol tallowates; and mixtures of these.

Other typical components of such compositions include opacifiers, preferably 0.2 to 2.0% by weight; the preservatives, preferably from 0.2 to 2.0% by weight; and perfumes, preferably 0.5 to 2.0% by weight. Cationic polymers such as Jaguar (R > Rhone Poulenc &Polymer JR < R) from Amerchol may also be included.

It is an essential feature of the invention that the additive formulation and the base formulation are physically separate but collectively dispensable from a packaging means and typically a single packaging means. Such packaging means include those systems comprising two separate compartments. Ensuring that the base formulation and the additive formulation are separated can be achieved in a variety of ways: Packaging the composition such that the base formulation and the additive formulation are present in separate compartments or in separate domains within the packaging; including the encapsulation of the additive formulation; and by processing the composition by coextrusion to produce a striped product in which the individual streaks contain the base formulation or additive formulation.

The compositions of the invention can be formulated as products for washing the skin, for example bath or shower gels, hand washing compositions or facial cleansing liquids; porducts for before and after shaving; skin care products that are rinsed, removed or left; products for washing hair and for dental use.

The compositions of the invention will generally be flowable or semi-liquid liquids, for example, pastes and will have a viscosity in the range of 250 to 100,000 mpas measured at an effort rate of 1 and 25 ° C, on a Haake RV20 Rotoviscometer .

When the product is formulated as a shower gel, the viscosity will generally be in the range of 800 to 30,000 mpas measured at an effort rate of 1 to 25 ° C.

When the product is formulated as a facial cleansing product the viscosity will generally be in the range of 3000 to 100,000 mpas measured at an effort rate of 1 and 25 ° C.

The invention will be further illustrated by reference to the following non-limiting examples. The examples are for illustrative purposes only and are not intended to limit the claims in any way.

Examples The foam is measured using the cylinder stir method. Using this method, 4 g of product having different proportions of fringes of surfactant agent to benefit agent was dispensed into the bottom of a 250 ml graduated cylinder; then 50 g of water was added gently; and the cylinder was capped and then gently agitated by turning the cylinder upside down 10 times. The volume of foam was then measured.

A liquid cleanser composition was prepared wherein the fringe of the surfactant had the composition set forth in Table I and the fringe of benefit agent had the composition established either in Example 1 or in the comparative of Table II (Example 1 having 10% by weight of surfactants of benefit band and the comparative having no surfactant). Tables I and II are established below: Surfactant strip Examples of the Benefit Agent Using the foam measurement technique described above, different combinations of 4 grams of surfactant fringe and benefit fringe were dispersed and measurements of the foam were taken. The results are those established in Table III below: As can be clearly seen in Table III above, when a surfactant is used in the benefit band in (Example I), there is much more consistency in the amount of foam obtained no matter how the fringes are dispensed. By contrast, when no surfactant is present (Comparative), foaming is high only when more of this surfactant is dispensed. Inadvertently distributing larger amounts of profit margin clearly results in poor suds. Even at a 50-50 distribution, the foam is much higher when the surfactant is seated in the benefit range (99 ml) than if there were no surfactant in the benefit range (58 ml).

Example 2 In this example, applicants used the same strip of surfactant as in Example 1 and the benefit fringe used was slightly different in composition as set forth in Table IV below.

Examples of Benefit Strip All quantities are in% by weight. Again, Comparative 2 does not have any surfactant.

Using the foaming measurement test described above, the foam values were measured and the results set forth in Table V below:

Claims (1)

Again, it is clearly demonstrated that the volume of the foam is more consistent, regardless of how the fringes are dispensed (eg, even at 0 grams of surfactant fringe and 4 grams of fringe benefit) when the fringe of the agent benefit contains a surfactant. Claims

1. Cleaning composition and aqueous liquid humectant comprising: (a) From 10% to 99.9% by weight of the total product of a base formulation, the base formulation comprising: from 1 to 35% by weight of an anionic, nonionic, amphoteric / zwitterionic or cationic surfactant or mixtures thereof; and the balance water; and (b) From 0.1% to 90% by weight of the total product of an additive formulation, the additive formulation comprising: (i) from 1 to 80% by weight of a benefit agent; (ii) from 0.1% to 20% by weight of an anionic, nonionic, amphoteric / zwitterionic or cationic surfactant or mixtures thereof; and the balance water; and (iii) equilibrium water; wherein the additive formulation and the base formulation are physically separate but are combinedly dispensed from a single packing medium as individual strips avoiding the need to post-mix the base formulation with the additive formulation before use; wherein each strip has a width of at least 1000 microns; and the height of the froth of the fringe of the additive formulation comprising the benefit agent is greater than 88 ml using the cylinder agitation method. A composition as claimed in claim 1, wherein the base formulation is 30 to 70% by weight of the total product. A composition as claimed in claim 1 or claim 2, wherein the base formulation further comprises a cationic polymer, a perfume, a thickener or an opacifier. A composition as claimed in any of the preceding claims, wherein the additive formulation is 30 to 70% by weight of the total product. A composition as claimed in any of the preceding claims, wherein the benefit agent is from 5 to 60% by weight of the additive composition. A composition as claimed in any of the preceding claims, wherein the surfactant is from 5 to 20% by weight of the additive formulation. A composition as claimed in any of the preceding claims, wherein the additive formulation further comprises a cationic polymer, a thickener, a perfume or an opacifier.