MXPA99008375A - Personal cleansing bar with enhanced deposition - Google Patents

Abstract

The present invention relates to a method of enhancing deposition to benefit agent from bars, which method comprises separately preparing an adjuvant composition comprising benefit agent and deposition polymer (e.g., cationic polymer);and base bar composition comprising a surfactant system. By combining adjuvant compositions separetely from the base bar composition, it is possible to create a final bar having enhanced deposition of benefit agent without compromising processing or consumer attributes (e.g., foaming).

Description

PERSONAL CLEANING BAR WITH IMPROVED DEPOSIT FIELD OF THE INVENTION The present invention relates to a method for improving the deposition of beneficial agents from stick compositions using auxiliary compositions. Specifically, the beneficial auxiliaries containing a beneficial agent and a reservoir polymer are separately formed and mixed with wafers containing a surfactant to form final bars. By utilizing the beneficial medical features, the applicants are able to administer a perceptible benefit to the skin, without adversely affecting the processing of the bar and without compromising the performance of the foam. In a second embodiment, the invention relates to bars prepared using such auxiliary compositions.

BACKGROUND It is difficult to formulate a personal wash bar / which can provide a sufficient skin benefit agent "on the skin to provide a perceptible benefit to the skin and at the same time does not affect the processing of the bar (e.g. The beneficial agent can be sticky and clogged the machinery, can be of high viscosity and make the stick composition difficult to extrude) and / or affect the user properties of the bar (e.g., puma formation). For example, soap bars containing high levels of oils have been claimed in U.S. Patent No. 3,814,698 issued to Ferrara et al., However, such soap bars tend to reduce foaming, are Smooth and softer with increased use, which makes the bars difficult to use and undesirable to handle In addition to the previous undesirable properties, the soap bars that They have a high level of oils that are soft and very soft resulting in processing difficulties through the conventional bar extrusion equipment. Unexpectedly, applicants have found that when the beneficial agents are separately incorporated into bars as part of a bar assistant comprising (1) a beneficial agent; (2) a depot polymer auxiliary (e.g., cationic polymer); and (3) an additional water soluble or dispersible material (for example, to manipulate the stiffness, flowability and dispersibility of the additive), an improved deposition of the beneficial agent is achieved without affecting the processing or compliing of the volume. of foam. The use of deposition polymers, such as cationic polymers to improve the deposition of a water-insoluble particle (eg, silicone oil), is known in the context of depositing a shampoo on the hair. U.S. Patent No. 5,037,818 issued to Sime, for example, teaches cationics to improve the deposition on hair from shampoos. WO 94/03152 (assigned to Unilever PLC) teaches clear cleaners which can effectively deposit oil on the skin using cationic polymers. U.S. Patent No. 4,788,006 issued to Bolich, Jr. , et al., teaches shampoo with silicone particles of 2 to 50 microns, such compositions contain xanthan gum to condition the hair. However, none of the above references refers to the deposition of a beneficial agent from bars on the skin using cationic polymers, they leave only the use of specific auxiliary compositions, the beneficial agent comprising a deposit aid (eg, cationic). ) and optional water-soluble or water-dispersible materials, wherein auxiliaries can provide benefits without compromising bar processing and / or bar usage properties. The technique has described personal cleansing bars containing conditioner bath oils (see, for example, U.S. Patent No. 3,814,698 issued to Ferrara). Conditioning oils, however, they reduce the spuma and the foaming, create difficulties in the processing in laborious work and stamping and are not deposited in compounds sufficiently to provide a perceptible effect on the skin. The technique also describes personal washout bars comprising cationic polymers to provide a skin conditioning and / or mildness effect (see, e.g., U.S. Patent No. 4,673,525 issued to Small et al.; U.S. Patents 4,820,447 issued to Medcalf, Jr., et al.; and 5,096, 608 issued to Small et al.). The cationic is not added to a separate auxiliary powder / wafer, which is then mixed with a base wafer before laborious work and extrusion to form a final bar. Although not wishing to be bound by theory, it is believed that this formation of a separate concentrated region before mixing with a base wafer, which allows the improved deposit to occur in the present invention compared to the reference. U.S. Patent No. 3,761,418 issued to Parran, Jr. discloses detergent compositions containing both water insoluble particulates and cationic polymers to improve the deposition and retention of the substances in particular on the surfaces washed with the detergent composition. Specifically, the improved deposition of antimicrobial agents from a toilet detergent bar using cationic polymers is described. The cationic polymer and the beneficial agent can be mixed together before being mixed with the bar components.

US Pat. No. 5,294,363 relates to a synthetic detergent bar having improved processability, smoothness and rinsing characteristics, while not compromising foaming. The method for making the synthetic detergent bar can include mixing a cationic polymer with a free fatty acid before mixing with the stick composition. In summary, it is known that the deposit of water insoluble particles from the personal cleansing product can be improved by using cationic portions, (for example, the use of cationic to improve the antimicrobial deposit from the detergent bar). However, when the cationic has been used to improve the oil deposit, the deposit has been sticky and is not sufficient to obtain a perceptible effect on the skin. This is because the cationic and the beneficial agent / oil have never been physically separated from the rest of the composition before the final formation of the bar. Unexpectedly, applicants have found that when the beneficial agent and the cationic polymer are formed separately ~ and subsequently mixed with other bar components, an improved deposit is obtained. In addition, the bars prepared using ob 1 e a s / po 1 or s auxiliaries can be easily processed by conventional bar processes, and the properties of the foam are not understood. Finally, the applicants note that in a co-pending application, filed the same day as the present application, entitled "Process" for Making Bar Compositions Having Enhanced Deposition of Benefit Agent Comprising Use of Specific Spray-Dryable Ad juvant Po ders ", applicants teach the use of an auxiliary powder prepared separately to be mixed with base wafers containing surfactants The auxiliary of this invention, however, comprises vehicles of minimum melting point (80 ° C and more, preferably around 100 °. C), and can be prepared only by spray drying In contrast, the auxiliaries of the present invention can be prepared by spray drying, freeze drying and other forms of drying.

BRIEF DESCRIPTION OF THE INVENTION The invention relates to a method for improving the deposition of beneficial agents from sticks, said method comprising separately preparing (1) auxiliary compositions comprising a beneficial agent, a reservoir polymer and optionally a polymer. soluble in water or dispersible in water; and (2) compositions containing a "base" surfactant. The "auxiliary compositions of the invention comprise: from 20% to 96%, preferably from 30% to 60% by weight of the compounding agent of the composition, from 2% to 40%, preferably from 5% to 30% by weight. weight of the cationic polymer in the composition, from 0% to 78% by weight of a water-soluble dispersible filler of the composition, from 0% to 15% by weight of water in the composition. 5 to 50% ", preferably 15 to 35% by weight of the total bar composition of the auxiliary compositions described above.

In a second embodiment, the invention relates to a process for making the auxiliary composition "of the invention comprising the beneficial agent, ~ p or TL deposit number and an optional water soluble / dispersible agent, and drying such a mixture (" e.g. , through freeze drying, spray drying or roll drying) to "form solid or semi-solid auxiliaries.

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the deposition of beneficial agents, such method comprises separately preparing the auxiliary bar codes that comprise a beneficial people, an auxiliary: depot (for example , a cationic polymer) and soluble materials in water / water is optional. The auxiliaries are mixed with "base" bar compositions, laboriously worked, extruded and stamped to form "end bars" or mixed with molten base bar compositions and solidified to form a bar.

The invention further relates to stick compositions comprising a mixture of (a) the beneficial agent composition and (b) such "base" (comprising mainly an active surfactant system). Each of the separate auxiliaries and base bar compositions are described in more detail below.

AUXILIARY COMPOSITIONS The auxiliary composition of the invention (as noted, the beneficial agent and the deposition polymer, must be added as a separate auxiliary composition instead of being added as individual components with other final bar ingredients in the mixing. initial), have the following composition: (1) from 20% to 96% by weight of the composition of the beneficial agent; (2) from 2% to 40%, preferably from 5% to 30% by weight of the composition of the "deposit (for example, cationic) polymer; (3) 0% to 78% by weight of the composition of the soluble filler in water or dispersible in water, and (4) of O 15% by weight of the water composition Beneficial Agent Composition The beneficial agent "composition" of the present invention can be a single beneficial agent component or can be a thin beneficial agent compound through a vehicle. In addition, the beneficial agent composition can be a mixture of two or more compounds. In this case, a mixture of oil and a solid compound are not preferred since a combination of oil with hydrophobic solid particles can work as an antifoam, which can reduce the foam of the bars containing this type of beneficial auxiliaries. In addition, the same beneficial agent can act as a vehicle for other components if it is desired to add to the bar composition. The beneficial agent can be an "emollient oil" through which it is meant to mean a substance that softens the skin (stratum corneum) by increasing its water content and keeping it soft by delaying the decrease in water content. Preferred emollients include: (a) silicone oils, gums and modifications thereof, such as linear polydimethylsiloxanes. and - cyclic; amino, aluminum and silicone oils; (b) fats and oils including fats- and natural oils such as jojoba, soybean, rice, avocado, almond, olive, sesame, persic, castor, coconut, mink oils; cocoa fat; bait of meat, lard; hardened oils obtained through the hydrogenation of the aforementioned oils; and synthetic mono, di and triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride; (c) waxes such as carnauba, whale sperm, "beeswax, lanolin and its derivatives;" (d) _ hydrophobic plant extracts; (e) hydrocarbons such as paraffins, liguids, petrolatum, microcrystalline wax, ceresin, esgualene, pristaeno, and mineral oil; (f) higher fatty acids such as lauryl, myristic, palitic, stearic, behenic, oleic, linoleic, linolenic, lanolic, isostearic and poly unsaturated fatty acids (PUFA) acids; (g) superior alcohols such as lauric, cetyl, stearyl, oleic, behenyl, cholesterolic and 2-hexydecanolic alcohol; (h) esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glycerol mono stearate , glyceryl distearate, glycerol tristearate, algayl lactate, algayl citrate and alkyl tartrate; (i) essential oils such as mint, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus products, calamus, pine, lavender, laurel, key, hiba, eucalyptus, lemon, milk chicken, thyme, mint, rose, sage, menthol, cineol, eugenol, citral, citronella, borneol, linalool, geraniol, ass grass, camphor, thyme, spirantol, penene, limonene and terpenoid oils; (j) lipids such as cholesterol, ceramides, sucrose esters and p eudocarbons as described in European Patent Specification No. 556,957; (k) vitamins such as vitamin A and E, and alkylic esters of vitamin, including those alkyl esters of vitamin C; (1) sunscreens such as octyl methoxyl cinnamate (Parsol MCX) and butylmethoxy benzoylmethane (Parsol 1789); (m) phospholipids; and (n) mixtures of any of the above components. Particularly preferred beneficial agents are silicone oil, petrolatum and vegetable oils, preferably having a viscosity greater than about 1,000 centipoise. The silicone may be a gum and / or may be a mixture of silicones, also preferably having a viscosity greater than 1,000 centistokes. An example is p or 1 i dime t i 1 s i 1 ox anus having a viscosity of approximately 607000 centistokes. The beneficial agent generally comprises about 20% to 96%, preferably 30% to 80% by weight of 1 to 8% by weight.

Deposit Polymer The depot polymer may be a cationic polymer or amphoteric polymers with excess positive charges Examples of suitable deposition polymers for the auxiliary composition are described in WO 94/03152, WO 93/04161, WO 93. / 21293, U.S. Patent 4,299,494 and U.S. Patent 4,272,515 These are cationic guar gum derivatives, which are commercially available under the trade name Jaguar (R) of Rhone Poulenc such as Jaguar C13S Jaguar C16, Jaguar C14S Jaguar C 17; those under the trademark of N-Hance (R> of Hercules such as N-Hance 3215, N-Hance 3196 or N-Hance 3000) and cationic cellulose ethers which are available from Union Carbide under the trade name Polymer JR (R >) Other preferred cationic polymers are synthetic cationic polymers such as homo or copolymers of dimethyl dialkyl ammonium chloride, available under the tradename of Merguat (R) 100 or Merguat (R) 550, amphoteric acid polymers Acryl chloride of dime ti ldi to 1 qui 1 ammonia or available under the tradename of Merquet (R) 280 ex Calgon Corp., pol i acr i 1 ami da s cation such as Saleare "11 of Allied Colloids Inc. , and cationic vinylpyrrolidone copolymers such as Gafguat (R) 755 from GAF Corp.

Still other cationics include Mirapol polymer such as Mirapol A15 (R) by Miranol Chemicals, and cationic starch such as StaLok 300 and 400 (R) made by Staley, Inc. The reservoir polymer can comprise from 2% to 40% by weight, preferably from 5% to 30% of the auxiliary composition.

Filler S or 1 ub 1 e / Di s pe r s ab 1 e in Water The filler s or 1 ub 1 e / di s p e r s ab 1 e in water generally comprises the portion of the auxiliary _ not made of the beneficial agent and deposit polymer. The filler is used to modify the auxiliary physical properties such as flowability, stiffness, sensitivity to water and water dispersibility. The auxiliary of this invention is preferred to be solid or semi-solid materials, which are non-tacky, easy to handle and process, and capable of maintaining their integrity under bar processing conditions. After being incorporated into the bar, the auxiliary may exist in the bar as concentrated disc particles with beneficial skin agents and reservoir polymers to effectively deliver the beneficial agents on the skin during use of the bar. To avoid stickiness, stickiness and other properties of the bar during undesirable use, the discrete auxiliary particles may be modified using the water soluble or water dispersible filler. Specifically, auxiliary processing and physical properties in regulated use can be achieved by varying the level and type of fillers contained in the auxiliaries. A variety of soluble or water dispersible materials can be used in fillers for these purposes. Fillers are referred to as solid materials, especially when the beneficial agents are oily materials. Examples of water soluble or dispersible materials which are useful as property modifying fillers include (1) anionic, "nonionic or amphoteric surfactants, which are suitable for personal cleansing applications such as algaylether sulfate, cocoyl 1 isethione, or cocoylminopropylbetaine; (2) high molecular weight nonionic materials, such as glycol for 1 glycol, sold by Union Carbide under the name of Carbowax Polyvinyl alcohol sold by Air Product under the trade name of Airvol (R), polyvinylimrolidone from ISP Technologies, Inc., ma 1 t or tri na or corn starch modified under the tradename Capsul (R) Purity Gum Bee (R) by National Starch &Chemicals, cellulose ester from Dow Chemical sold under the commercial name of Methocel | R | or Nitrosol (R) of Agualon; (3) inorganic or organic salts such as sulfate, sodium or magnesium citrate; (4) water-dispersible organic or inorganic solid particles, such as silica, silicates, talc, calcite, kaolin, fatty acids, waxes, starch and insoluble salt of fatty acids with a smaller size than 10 m, preferably less than 5 mm .

Optional Ingredients Other materials which may optionally be found in the auxiliary compositions are polyols, such as glycerin or propylene glycol, and additional surfactants, including amphoteric surfactants, such as co-coamido dop r opi lbe t a i na.

The auxiliary composition may further comprise from 0% to 15%, preferably from 1% to 10% by weight.

Auxiliary Preparation In general, the auxiliary is prepared by mixing all the components with water to form a uniform aqueous mixture. The mixture is then dried, i.e., freeze dried, spray dried or roll dried to form a solid or semi-solid material. The beneficial agents can be added to the aqueous mixture as pure ingredients or as emulsions. The size of the beneficial agents in the aqueous mixture before drying should be in the range of 100 mm to 0.1 mm, preferably in the range of 50 mm to 0.1 mm for the non-solid beneficial agents such as silicone or petrolatum oils, and in the range of 10 mm to 0.1 mm for solid beneficial agents such as fatty acids or waxes.

BASE BAR COMPOSITION The invention comprises stick compositions wherein from 5 to 50% by weight, preferably from 10% to 35% of the bar is auxiliary compositions as described above, and from 95% to 50% of the bar comprises a "base" composition, which generally comprises the surfactant agent system defining the final bar. The base composition can be solid if the bar is made through the process of extrusion or molten liquid if the bar is made, for example, through a process "casting under fusion." Specifically, the "base" composition of the system of surfactant comprises from about 30% to 90% by weight of a surfactant system, wherein the surfactant is selected from the group consisting of soap (including soap surfactant systems), anionic surfactant, surfactant Non-ionic surfactant, anionic surfactant, cationic surfactant, and mixtures thereof These wafers may further comprise other components typically found in the final bar compositions, eg, minor amounts of fragrance. , "conservative, opaque, skin feeling polymer, etc.

Surfactant Agent System The term "soap" is used herein in its popular sense, i.e., the alkali metal or the 1-alkali metal salts or the aliphatic alkane or monomeric alkoxy acids. Sodium, potassium, mono, di, and triethanolammonium cations, or combinations of these, are suitable for the purposes of this invention. In general, sodium soaps are used in the compositions of this invention, but from about 1% to about 25% of the soap can be potassium soaps. The soaps useful herein are the well-known alkali metal salts of natural or synthetic aliphatic acids (alkanoic or alginate), having from about 12 to 22 carbon atoms, preferably from 12 to about 18 carbon atoms. These can be described as alkali metal carboxylates and acrylic hydrocarbons having from about 12 to about 22 carbon atoms. The substances that have the fatty acid distribution of coconut oil can provide the lower end of the broad molecular weight scale, those soaps having the fatty acid distribution of peanut oil or rapeseed, or Hydrogenated derivatives may provide the upper end of the broad molecular weight scale.It is preferred to use soaps which contain the fatty acid distribution of coconut oil or bait, or mixtures thereof, since these are among the fats more easily The proportion of the fatty acids have at least 12 carbon atoms in the coconut oil soap being about 85%, this proportion will be higher when coconut oil mixtures and fats such as bait are used., palm oil, non-tropical nut oils or fats, where the main chain lengths are Cie and above. The preferred soap for use in the compositions of this invention has at least about 85% fatty acids having about 12 to 18 carbon atoms. The coconut oil used for the soap can be replaced all or in part by other oils "with a high aluric content", that is, oils or fats in which at least 50% of the total fatty acids are composed of lauric acids or myristics and mixtures thereof. These oils are usually illustrated by the tropical oil of the coconut oil. For example, these include: palm oil, babassu oil, ouricuri oil, tucum oil, ne nut oil, murumuru oil, jaboty palm seed oil, khakan palm seed oil, walnut oil, and ucuhuba butter. A preferred soap is a mixture of about 15% to about 20% coconut oil and about 80% to 7 85% bait. These mixtures contain approximately 95% fatty acids having about 12 to 18 carbon atoms. The soap can be prepared from coconut oil, in which case the fatty acid content is about 85% of the chain length of 12 to 18 carbon atoms. Soaps may contain unsaturation in accordance with commercially acceptable standards. "Ex-cessive unsaturation is normally avoided." Soaps can be made through the classic sheet boiling process or modern continuous soap making processes, where fat and natural oils such as bait or coconut oil or their equivalents are saponified with an alkali metal hydroxide using procedures well known to those skilled in the art.Alternatively, the bones can be made by neutralizing fatty acids such as lauric acids (C12). myristic (C14), palmitic (C 16), or this aric (C 18) with an alkali metal hydroxide or carbonate The active anionic detergent which can be used, which can be aliphatic sulfonatics, such as 1 to 1 cansu 1 fonat or primary (for example 8 to 22 = carbon atoms), primary alkanedisulphonate (for example 8 to 22 carbon atoms), to 1 q f ood ul s t one or de_ 8 to 22 carbon atoms, or i h i dr 1 gui 1 s u 1 f a t on or from 8 to 22 carbon atoms or alguilgliceriléter sulfonate (AGS); or aromatic sulfonates such as a 1 qui lbencensul f ona t o. The anionic can also be a 1 to 1 1 its 1 (for example, an alkylsulphite of 12 to 18 carbon atoms) or alkyl ether sulfate (including 1 to 1 g 1 iceri 1 ether sulfates) between the alkyl ether sulphates are those which have the formula: RO (CH2CH20) nS03M wherein R is an alkenyl or alkenyl having 8 to 18 carbon atoms, preferably 12 to 18 carbon atoms, n has an average value greater than 1.0, preferably greater than 3; and M is a solubilization cation such as sodium, potassium, ammonium or substituted ammonium, and the ammonium and sodium salts are preferred, and the anionic may also be alkylsulfosuccinates (including mono- and dialkyl, for example its 1 phosphonates of 6 to 22 carbon atoms), alkyl and acetic acid, alkyl and acyl sarcosinates, sulphoacetates, alkyls and phosphates of 8 to 22 carbon atoms, alkyl phosphate esters and alkoxyalipyl phosphate esters, acyl lactates, monoalkyl succinates and maleates of 8 to 22 carbon atoms, sulphoacetates, at 1 gu and 1 g 1 uc o si do s and ci 1 iseti ona. "Sulfins or succinates can be mono to 1 qui 1 their phosphides having the formula: R402CCH2CH (S03M) C02M; and s MEA amide phosphates of the formula: R4CONHCH2CH202CCH2CH (SO3M) C02M in where R4 varies from alguilo of 8 to 22 carbon atoms and M is a cation of solubilization Sarcosides are generally indicated by the formula: R1CON (CH3) CH2C02M, wherein R is an alkyl which varies from 8 to 20 carbon atoms and M is a solubilization cation Taurates are generally identified by the formula: R2CONR3CH2CH2S03M wherein R is alguyl which varies from atoms "of carbon, R is alguilo gue going from 1 to. 4 carbon atoms and M is a solubilization cation. Particularly preferred are the acyl isethionates of 8 to 18 carbon atoms.These esters are prepared through the reaction between alkali metal isethionate with mixed aliphatic fatty acids having 6 to 18 carbon atoms and an iodine value of less than 20. At least 75% of the mixed fatty acids have from 12 to 18 carbon atoms and up to 25% have from 6 to 10 carbon atoms, acyl isethiones, when present, will generally vary from about 10% to about 70% by weight of the total stick composition, preferably, this component is present of about 30% to 60%.

The compound may be an alkoxylated isethionate, as described by Ilardi et al., U.S. Patent No. 5,393,466, incorporated herein by reference. This compound has the general formula: O X R C-Q-CH-CH2- (OCH-CH2) m-S03M wherein R is an alkyl group having 8 to 18 carbon atoms, m is an integer of 1 to 4, X and Y are hydrogen or an alkyl group having 1 to 4 carbon atoms and M + is a monovalent cation such as for example, sodium, potassium or ammonium. Amphoteric detergents which may be used in this invention include "at least one acid group," which may be a carboxylic or sulphonic acid group, which include quaternary nitrogen, and are therefore quaternary amido acids. or alkenyl of 7 to 18 carbon atoms will usually agree with the total structural formula: O R R [-C-NH (CH,) -] -N -X-Y R wherein R1 is alkyl or alkenyl of 7 to 18 carbon atoms; R2 and R are each independently alkyl, hydroxyalkyl or c a r b ox i a 1 qu i 1 or from 1 to 3 carbon atoms; m is from 2 to 4; n is from 0 to 1; X is alkylene cLe 1 to 3 carbon atoms optionally substituted with hydroxyl; and Y is -C02- or -S03-_ "Suitable amphoteric detergents within the above general formula include simple betaines of the formula: * > R" I i R N CH2C02 R and ami dobe t a i na s of the formula: R - CONH (CH2) n-N -CH2C02 where n is 2 or 3. In both formulas R1, R and RJ are as previously defined. R in particular may be a mixture of alkyl groups of Ci 2 and C 4 co derivatives, such that at least half, preferably at least three quarters of the R 1 groups have from 10 to 14 carbon atoms. carbon. R2 and R3 are preferably methyl. An additional possibility is that the amphoteric detergent is a "sulfobetaine of the f or rmu 1 a: 2 R I RX-N + - (CH2) 3S03" R R - CONH (CH2) m-N - (CH2) 3S03 R where m is 2 or 3, or variants of these, where - (CH2) 3S03 is replaced by OH -CH2CHCH2S03 In these formulas, R1, R2 and R3 are as previously described. The nonionic component which can be used as the second component of the invention includes in particular the reaction products of compounds which have a hydrophobic group and a reactive hydrogen atom, for example, aliphatic alcohols, acids, amides or 1 gui 1 pheno 1 is with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. The specific detergent, non-ionic compounds are condensates of ethylene oxides of a 1 gui 1 f enol (C6-C22) r the condensation products of linear or branched alcohols, primary or secondary aliphatic (Cg-C18), and products made through the condensation of ethylene oxide and the reaction products of propylene oxide and ethylenediamine. Other so-called non-ionic detergent compounds include long chain tertiary amine oxides, long chain tertiary phosphine oxides and dialkylsulfide oxides. The nonionic component can also be a sugar amide, such as a polysaccharide amide. Specifically, the surfactant may be one of the 1 to c or t or i orm a s described in U.S. Patent No. ,389,279 issued to Au et al., Which is incorporated herein by reference, or may be one of the sugar amides described in Patent No. 5,009,814 issued to Kelkenberg, incorporated herein by reference. Examples of cationic detergents are quaternary ammonium compounds such as halides of a 1 gui 1 dime t i 1 amon i o. Other surfactants which can be used are described in the Patent of the States No. 3,723,325 issued to Parran J., and "Surface A ct: ive Agents and Detergents" (Vol. I and II) by Schwartz, Perry & Berch, both incorporated agui for reference in its entirety. While the bar may be a bar of pure soap, preferably, the surfactant system of this wafer (forming the surfactant system in the bar) comprises: (a) a first synthetic surfactant which is anionic; and (b) a second synthetic surfactant selected from the group consisting of a second anionic component different from the first, an anionic, an amphoteric and mixtures thereof. The first anionic component may be any of those described above, but preferably is an isethionate of 8 to 18 carbon atoms, as discussed above. Preferably, the composition will comprise from 10% to 90% by weight, preferably from 10% to 70% by weight of the total bar composition. The second surfactant preferably is a sulfosuccinate, a betaine or mixtures of the two. The second surfactant or surfactant mixture generally comprises from 1% to 10% of the total stick composition. A particularly preferred composition comprises sufficient sulfosuccinate to form 3-8% of the total bar compositions, and sufficient betaine to form 1-5% of the total bar composition.

Processing to Form the Final Bar In general, the humectant cleaning bar of the present invention can be made through techniques known in the field such as extrusion, melt casting or freezing process. A preferred process for preparing the final bar of the invention is the extrusion process, which comprises the steps of combining, drying, amalgamating, milling, laboriously working and printing. In this process, the auxiliary compositions described above can be added to, and blended with, the "base" surfactant compositions and other additives "in stick before laborious work, such as in the amalgamation or milling step." The premix is then extruded through the laborious and stamped workmanship to form the bar of the invention Another preferred process is a melt-casting / co n ge 1 acyone process, where the active agents and other ingredients of the bar they are mixed at high temperature to form a molten fluid capable of flowing, the molten fluid is then pumped into, or injected into, a cold mold to solidify inside the mold to form a rod. " In this process, the beneficial auxiliary can be added to the molten fluid as dispersed particles before it solidifies. The following examples are intended to illustrate the invention further and are not intended to limit the invention in any way, unless otherwise indicated, all percentages are intended to be percentages by weight.

E x ples Preparation of Bars Containing an Auxiliary The beneficial agent (e.g., silicone), containing auxiliaries of the examples, was prepared as follows. Deionized water, water soluble or dispersible fillers (mixture of surfactants / fatty acid or Carbowax PEG 2000), skin benefit agent (0.5 micron silicone emulsion from Dow Corning), and depot polymers were added. cationic (Jaguar C13S in glycerin dispersion and Merguat 100) to a reactor and mixed at 70 ° C using an overhead stirrer until all the ingredients were dissolved or completely dispersed to form a uniform mixture. The mixture was then cooled to about room temperature and freeze-dried overnight to form free-flowing solid auxiliaries for the preparation of the bar The rods containing the solid auxiliaries previously prepared were first prepared by mixing 15% by weight. of the solid auxiliary dried by freezing with 85% by weight of the bar wafer in a container. The Auxi 1 i ar / obl e mixture was then extruded through a Sigma Bench Top extruder twice to form pieces which were stamped to make example bars of this invention.

Depot site The deposit of the beneficial agent (eg, silicone oil) of bars was determined using a Varian Spectra AA600 Atomic Spectroscopy apparatus. A square strip of 5.08 cm x 5. "8" cm "(2 inches x 2 inches) of porcine skin was pre-moistened with warm tap water and 0.5 ml of water was applied to the skin. rubbed with "the bar for 15" seconds, foamed for 15 seconds and rinsed with hot running water for 10 seconds, then rubbed once with a paper towel and "allowed to dry for 2 minutes. The treated skin was extracted with 10 grams of xylene. The silicone content of xylene extraction was measured by atomic spectroscopy.

Examples 1 and 2: Charitable Bars A bar of the invention (Examples 1 and 2) and a bar of the comparative example (comparative example 1) were prepared with similar compositions. Comparative Example 1 has the same composition as the bar of Example 1, except that no cationic deposition polymer was present in the silicone auxiliary. Example 2 is similar to Example 1, but contains a different filler. Another bar of the comparative example (comparative example 2) was prepared, containing both the cationic deposition polymer and the silicon emulsion uniformly distributed in the bar. The bar of Comparative Example 2 was prepared by mixing both the cationic deposition polymer and the silicone emulsion thoroughly with all the other bar ingredients to develop a wafer (ie, it was first prepared without any separate auxiliary). The wafer was then extruded and stamped to make the bars of the Comparative Example. Both the cationic polymer and the silicone oil are uniformly distributed in the bar, instead of being concentrated in the auxiliaries as in the bars of Examples 1 and 2 (and Comparative Example 1) .The compositions are set forth below. : Table 1 The bars of Example 1, Example 2 and Comparative Example 1 were auxiliary bars. Comparative Example 2 was a non-auxiliary bar containing 1%. of Jaguar C13S, 5% Silicone oil and 96% wafer in bar. * Silicone emulsion: silicon oil emulsion of 60,000 cps, 50% solid, 0.5 mm ex. Dow Corning.

** Jaguar C13S: ex. Rhone - P ou 1 e n c, Cationic Cellulose. . *** -74.9% Sodium Cocoyl isethionate, 21.8% Fatty Acid and 3.0% Sodium Isethionate. - **** The bar wafer contains 51.9% cocoilisetion to sodium, 21.1% stearic acid, 4.90% sodium Isethionate, 3.3% coconut fatty acid, 11.8% sodium fatty acid soap and others minor ingredients. The bars made from these compositions were tested for the deposition results and the results are set forth below The deposit of silicone oil from the bars previously prepared on the porcine skin is given as follows: Example 1 3.02 micrograms / cm2 of skin Example 2 2.89 micrograms / cm2 of skin Comparative Examples 1 and 2 < 0.2 micrograms / cm2 of skin The above results clearly show that the deposit of the beneficial agents on the skin of the bars of the preferred examples (Examples 1 and 2 prepared first as auxiliaries and in "where the auxiliaries had a depot polymer. cationic) on the skin, was much greater for the two comparative examples (ie one without auxiliary cationic deposit in the auxiliary and one where, instead of making an auxiliary, the beneficial agent and the cationic were uniformly mixed in the composition).

Examples 3-4: Bars Containing Charitable Agent Additional examples 3 and 4 were prepared as examples 1 and 2. Examples 3 and 4 were again prepared by first preparing an auxiliary wafer / powder and then mixing with bar wafers containing surfactant " regular". Comparative examples 3 and 4 of the 3 and 4 only used the cationic deposition polymer in the auxiliary. The compositions were first fixed in Table 2 below: Table 2 Composition of Silicone Auxiliary before 1 Drying by Freezing E j em 1 o E j emp 1 o E j emp 1 o E j emp 1 o 3 Comp a r a - 4 C omp ara- "tive 3 _ ti o 4 Charitable Skin Agent 50 g 50 g * Silicone emulsion: 60,000 cps silicone oil emulsion "50% solid, 0.5 mm E x. Db w Corning. ** Barrel wafer containing 51.9% sodium cocoyl isethionate , 21.1% stearic acid, 4.90% sodium Isetionate, 3.3% coconut fatty acid, 11.8% sodium fatty acid soap and other minor ingredients In these examples, another deposit polymer, Merguat 280 (ex. Calgon), which is a cationic copolymer highly charged with dimethyl chloride 1 to 1 guanyone and acrylic acid, and a silicone oil of high viscosity (60,000 cps), were used for the preparation of the auxiliary. observed, both the silicone oil auxiliaries and the example rods were prepared by the methods described in Examples 1-2 The deposition of the silicon from these 4 rods on the porcine skin was determined and is presented below E Ejjeemmpplloo 33 2.39"microgra mos / cm2 of skin Comparative Example 3 0.68"micrograms / cm2 of skin E j lo lo 4 5.02 micrograms / cm2 of skin Comparative Example 4 0.80 micrograms / cm2 of skin As seen, the bars of Examples 3 and 4 were deposited at much higher levels of silicone oil than the comparative examples, which do not contain cationic polymers in the auxiliaries. Again, the critical aspect of the cationic deposition polymer in the auxiliary clearly is changed.

Examples 5-7: Auxiliary Containing Low Viscosity Silicone Oil Examples 5, 6, 7 and "Comparative Example with the composition shown in Table 3 were prepared using the same procedure described in Examples 1-2.

* Jaguar C13: ex. Rh one - P ou 1 en c, Cationic Cellulose ** 74.9% cocoyl sodium Isethionate, 21.8% Fatty Acid and 3.0% Sodium Isethionate.

*** Bar Wafer containing 51.9% sodium cocoyl isethionate, 21.1% stearic acid, 4.90% sodium Isethionate, 3.3% coconut fatty acid, 11.8% sodium fatty acid soap and other minor ingredients . The deposit of the silicone oil on the pig skin of these bars is summarized below. E j emp lo 5 1.58 micrograms / cm2 of skin E j e lo 6 2.51 micrograms / cm2 of skin E j e lo 7 2.03 micrograms / cm2 of skin Comparative Example 5 0.25 micrograms / cm2 of skin Example 7, which contained a lower viscosity silicone oil (1,000 cps ex Dow Corning) which was used for Examples 5, 6 and Comparative Example 5, was deposited in approximately the same amount of the silicone oil of Examples 5 and 6 and deposited much more than in Comparative Example 5. These examples show that the deposition of the beneficial agent in the skin from bars containing the preferred auxiliaries does not depend on the viscosity of the skin-beneficial agents.

Examples 8-10: Solid Skin Beneficial Agents A solid skin beneficial agent, stearic acid was used to prepare the bars of the example of this invention. An emulsion of stearic acid containing 49.5% of stearic acid particles and 1% of co-ori-dope was prepared using a Ross mixer eguided with a homogenizer, 4-blade mixer and scraper. 2.021 grams of fatty acid were added to 2.061 grams of a 2% solution of cocoamido p r op i lbe t a ina and emulsified at 70 ° C. The prepared emulsion had needle-like crystals with a particle size of approximately 37.5 microns as determined by the Malvern particle size. The Bar Composition of Examples 8-10 and Comparative Example 8 is shown in Table 4 below. Table 4 * The bar wafer contains 27.3% of sodium cocoyl isethionate, 9.18% of a mixture of palmic acid and cobalt, 33.9% of Carbowax PEG 80002.46% "Sodium Isethionate, 5.1% C amco dop roi Ib eta Sodium with 15% of the whole The fatty acid auxiliaries of Examples 8, 9 and 10 were prepared by mixing the emulsion of fatty acid with a solution of room temperature polymer using a Hobert Kitchen auxiliary mixer for about 30 minutes.The fatty acid / polymer mixture was then freeze-free to form free-flowing fatty acid auxiliaries. The fatty acid auxiliary of Comparative Example 8 was prepared by freeze-drying the fatty acid emulsion.The bars containing these fatty acid auxiliaries were pre-prepared through the same process described in Examples 1-2. The deposition of the fatty acid from bars on the porcine skin was determined using GC The skin was treated with a bar using the same procedure described in Example 1, except that it was used on 10 g of heptane instead of xylene for extraction. The deposition of the fatty acid on the skin from the sticks is shown below: Example 8 3.41 micrograms / cm 2 of skin Example 9 4.95 micrograms / cm2 of skin Example 10 9.86 micrograms / cm2 of skin Comparative Example 8 2.5 micrograms / cm2 of skin These data show that the deposit of the solid beneficial agent from the bar can also be improved using the auxiliaries of the invention.

Claims (9)

1. A method for improving the deposition of a beneficial agent from a stick composition, the method comprises: (A) preparing in dry form: (1) a dry auxiliary composition, which comports: (a) 20% to 96% by weight of a beneficial agent, (b) from 2% to 40% by weight of a cationic deposition polymer, (c) from 0% to 78% by weight of a water-soluble or dispersible filler in water, wherein the dry auxiliary composition is prepared by forming an aqueous mixture which includes - the beneficial agent, the cationic deposition polymer and the water soluble or water dispersible filler, and subsequently drying the aqueous mixture; and (2) a base bar composition comprising a surfactant system; and (B) mixing from 5 to 50% by weight of the dry auxiliary composition (1) and from 50 to 95% of the composition (2) in the base bar to form a bar.

2. The method as claimed in claim 1, wherein the beneficial agent in the dry auxiliary composition comprises from 30% to 60% by weight of the auxiliary composition.

3. The method as claimed in claim 1 or claim 2, wherein the cationic deposition polymer comprises from 5% to 30% by weight of the auxiliary composition.

4. The method as claimed in any one of the preceding claims, wherein the surfactant system of the base bar composition comprises: (a) a first anionic surfactant; and (b) a second surfactant comprising a second anionic surfactant, a nonionic surfactant, an amphoteric surfactant, and mixtures thereof.

5. The method as claimed in any one of the preceding claims, wherein the first anionic surfactant is acyl isethionate.

6. The method as claimed in claim 5, wherein the acyl isethionate comprises from 10% to 90% by weight of the composition in the base bar.

7. The method according to any one of the rei indications 4 to 6, wherein the second surfactant is either a: (a) sulfosuccinate; (b) betaine; (c) amidococoylbetaine; or (d) comprises a mixture of sulfosuccinate and betaine.

8. The bar made through the method of any of the preceding claims.

9. The bar according to claim 7, which comprises from 5% to 50% of the auxiliary composition and from 95% to 50% of the composition in the base bar comprising the surfactant system.