MX2009001917A - Detergent composition. - Google Patents

Abstract

An extrudable detergent composition comprising, i) 20 % to 80 % by weight soap; ii) 0.5 % to 5 % by weight surfactant selected from anionic, non-ionic, amphoteric, betaines or zwitter-ionic surfactants; iii) 0.1 % to 10 % by weight water soluble salt of dicarboxylic acid having the formula COOH-(CH 2)n- COOH where "n" is an integer from 2 to 8; iv) 0.1 % to 10 % by weight water soluble salt of alpha-hydroxy acid.

Description

DETERGENT COMPOSITION Description of the Invention The present invention relates to extrudable detergent compositions, in particular to detergent compositions in the form of a stick and comprising beneficial agents, these bars have improved the resistance to wet cracking and to becoming brittle. The detergent compositions are used by all people all over the world, for the care and cleaning of the skin. It is known that detergents help to remove dirt from the skin, the mechanism to do this is well understood. In addition to using the detergents for their main function, i.e. cleaning, they are also useful as delivery vehicles for different beneficial agents, eg, wetting agents and skin rinse additives, which are incorporated in the present to increase the benefits to the user. The consumer search has revealed that the presence of these added beneficial agents in the detergent compositions provides a considerable interest to the consumer. Consumers are also interested in not so aggressive ways to cleanse their skin that causes the least damage to the natural protective barrier of the skin and also, retains moisture in their skin. It can be seen that this consumer interest is directly proportional to the number of Ref .: 200068 Different benefits granted by the detergent composition, during and after its use. Therefore, detergent compositions capable of causing multiple benefits are highly desirable. Wetting and rinsing of the skin remain the most preferred benefits among others, which the consumer searches for in personal care compositions. Skin lightening is especially desired by people in the Asian subcontinent, while people around the world want moisture. Different skin lightening assets including herbal extracts and synthetic chemical compounds have been used and reported. Dicarboxylic acids, such as azelaic acid and its salts, form a class of powerful skin rinsing agents, which are reported in the prior art. The use of dicarboxylic acids has also been reported in GB (2068997 Colgate, 1981) for the prevention / reduction of wet cracking in detergent sticks. On the other hand, the benefits of alpha-hydroxy acids, which include skin rinsing, wetting and chemical peeling, are also known. The benefits of wetting are usually achieved with the incorporation of high levels of alpha-hydroxy acids. This has been described in GB 1417183 (Unilever, 1975), which claims the benefits of specific wetting without affecting adversely the processing of the bars. It has been noted that in its publication, the levels of alpha-hydroxy acid is preferably at least 20% by weight of the composition. GB 1460442 (Unilever, 1977) describes detergent sticks for the use of personal washing, containing soap, synthetic detergents and wetting compound selected from dicarboxylic acids, hydroxy acids, amino acids or combinations thereof. The level of incorporation is from 5-55% by weight. These bars provide wetting benefits that are due to the high levels of the acids. The present inventors wished to combine the benefits of skin rinsing of dicarboxylic acids with the benefits of alpha-hydroxy acids and offer the same with the detergent composition for cleaning with washing. When the present inventors tried to make detergent compositions comprising the two previous classes of beneficial agents, they found, surprisingly, that when the composition was extruded into bars, the bars exhibited cracking with moisture. This was unexpected since dicarboxylic acids were added to the detergent bars in the past to make them resistant to cracking. Through extensive experimentation, the current inventors found that the same problem could be solved effectively by incorporating a reduced amount of surfactants into the detergent composition. Therefore, an object of the present invention is to provide multiple beneficial agents by means of a detergent composition. Another object of the present invention is to produce extrudable detergent compositions which are resistant to cracking, having good ionic properties, comprising the combination of dicarboxylic acid and alpha-hydroxy acid. According to one aspect, the present invention relates to an extrudable detergent composition comprising, 20% to 80% by weight of soap; 0.5 to 5% by weight surfactant selected with anionic, nonionic, amphoteric and amphoteric ionic surfactants; 0.1% to 10% by weight of water soluble salt of dicarboxylic acid having the formula COOH- (CH2) n -COOH where "n" is an integer from 2 to 8; 0.1% to 10% by weight of water-soluble salt of alpha-hydroxy acid. According to a preferred aspect, the surfactant includes a mixture of anionic surfactant and nonionic surfactant, more preferably the anionic surfactant is present from 2% to 4% and the nonionic surfactant is present up to 1% by weight. According to a highly preferred aspect, the anionic surfactant is an alkali metal salt of sulphate of C8-C18 primary alcohol and the non-ionic surfactant is an amine oxide. The term "extrudable" for the purpose of this invention means that the composition is capable of being extruded through dies with required dimensions, in the form of streams that can be cut into small square bars or bars, which are ready to use. The term "detergent composition" has been used herein, as a synonym for soaps, bars of soap and bars for personal care. Another advantage of the invention will become completely apparent immediately with the detailed description of the preferred embodiments of the invention. The present invention relates to extrudable detergent compositions comprising beneficial agents. Wet cracking of the soap, ie, the tendency of the soap to form cracks when it is wetted and dried, particularly during use, has been a general problem. Moisture cracking refers to the known defect of soap bars that develop cracks when wetted and dried repeatedly. Detergent bars that exhibit moisture cracking are not preferred by the consumer. The present inventors have proposed a detergent composition that provides the benefits of whitening and moisturizing the skin to the user, without compromising the quality of the physical structure and integrity of the skin. the bar, when used. In the detergent compositions of the present invention, it is preferred that the soap content be from 20 to 80% by weight, more preferably from 40-75%. The laundry detergent predominant in the detergent composition of the present invention could be any conventional soap, otherwise referred to as a fatty acid salt. The soap can be supplied with one or a mixture of unsaturated or saturated monocarboxylic acids, straight or branched chain C8-C22, preferably C12-C18, of natural or synthetic origin. Natural sources, eg animal fats or oils, marine or vegetable, almost always produce mixtures of these fatty acids, all can be used. Examples of these include the fatty acids derived from coconut oil, olive oil, coconut oil, resin oil, soybean oil, cottonseed oil, peanut oil, safflower oil, sunflower oil, corn oil. , fish oil, tallow, and the like. Illustratively, the individual fatty acids include capric, lauric, myristic, stearic, oleic, palmitic, palmitoleic, ricinoleic, linoleic and linoleic acids and the like. The fatty acids can also be derived synthetically by the oxidation of paraffin, oxo synthesis, or the like. The cation portion or salt of the soap is preferably an alkali metal such as potassium and especially sodium but alternatively it may be an alkaline earth metal such as calcium or magnesium, or ammonium, substituted ammonium, or organic amine such as a lower alkylamine or a lower alkanolamine. The tallow fatty acids can be derived from different animal sources and usually comprise about 1-8% myristic acid, about 21-32% palmitic acid, about 14-31% stearic acid, about 0-4 % palmitoleic acid, around 35-50% oleic acid and around 0-5% linoleic acid. A typical distribution is 2.5% myristic acid, 29% palmitic acid, 23% stearic acid, 2% palmitoleic acid, 41.5% oleic acid, and 3% linoleic acid. Other similar mixtures are also included, such as those of palm oil and the derivatives of different tallow and animal lard. Coconut oil refers to mixtures of fatty acids that have a carbon chain length distribution of about 8% C8, 7% CIO, 48% C12, 17% C14, 8% C16, 2% C18, 7% oleic and 2% linoleic acids (the first six are fatty acids). The coconut oil used for the soap may be substituted in whole or in part by other "superior-lauric" oils, that is, oils or fats in which at least 50% of the total fatty acids are composed of lauric or myristic acids and mixtures of these. These oils are usually exemplified for the tropical nut oils of the coconut oil class. For example, they include: palm kernel oil, babassu oil, ouricuri oil, tucum oil, cohuna oil, murumurú oil, jabotí almond oil, khakan almond oil, dika walnut oil, and ucuhuba butter. A preferred soap is a mixture of about 30% to about 40% coconut oil and about 60% to about 70% tallow. The mixtures may contain higher amounts of tallow, for example, 15% to about 20% coconut and 80 to 85% tallow. The soaps may contain unsaturation in accordance with commercially acceptable standards. Normally excessive unsaturation is avoided. Without wishing to relate to the theory, the presence of strong electrolytes, in the soap bar, however, can create processing problems as they would interrupt the liquid crystal phases of the soap matrix holding the insoluble soaps together. Without these phases of liquid crystals, the soap can not be extruded in any way. Therefore, it is preferred that the content of the inorganic electrolytes in the detergent composition be kept very low and preferably less than 1% by weight of the composition. Electrolytes include sodium chloride, sodium sulfate, sodium sulfite and sodium bisulfite, which are usually added to detergent compositions.

It is preferred that the composition comprises from 0.1% to 10%, more preferably from 1% to 5% and more preferably from 1% to 2% by weight of water soluble salt of dicarboxylic acid having the formula COOH- (CH2) - nCOOH where "n" is an integer from 2 to 8. More preferably, the dicarboxylic acid is selected from adipic acid, azelaic acid, or sebacic acid, sebacic acid is more preferred. Water soluble salts include alkali metal salts, e.g., sodium or potassium, or alkanolamine or ammonium salts. Dicarboxylic acids are used herein, primarily as beneficial agents for skin lightening. The water-soluble salt of alpha-hydroxy acid is preferably from 0.1% to 10%, more preferably from 1% to 5% and more preferably from 1% to 2% by weight of the composition. Preferably, the alpha-hydroxy acid is selected from glycolic acid, lactic acid, malic acid, citric acid or tartaric acid or mixtures thereof. Lactic acid is more preferred. Water soluble salts include alkali metal salts, e.g., sodium or potassium salts, or alkanolamine or ammonium. Alpha-hydroxy acids (AHAs) are organic carboxylic acids that are naturally present as glycolic acid, a natural constituent of sugar cane juice and lactic acid, found in tomato juice and whey the milk Topical formulations that Incorporate these acids are frequently used and are also present in a variety of intensively promoted cosmetic products. Among its different benefits reported are the exfoliation of dead skin cells, the moisturization of the skin, the recoil of the damage caused by light and the reduction of wrinkles, dark spots and roughness. The total result is the skin that looks and feels better. In accordance with the present invention, the detergent composition comprises 0.5% to 5%, more preferably from 0.5% to 2% by weight of surfactant selected from anionic, nonionic, amphoteric, betaine or amphoteric ionic surfactants. Cationic surfactants are usually not suitable for the present invention, since they are not compatible with the predominantly anionic atmosphere of the composition, due to the relatively large proportion of the fatty acid soaps. However, it is stated that traces of cationic surfactants, when present in the composition as an impurity, or when added in another way, do not cause any noticeable undesirable effects. The synthetic detergents contemplated as surfactants under this invention are compounds other than soap whose detergent properties, such as soap, are due to the presence of a hydrophilic group and a hydrophobic group in the molecule. Water-soluble anionic surfactants contemplated they are the alkali metal salts (such as sodium and potassium) of the linear higher alkylbenzene sulphonates and the alkali metal salts of ethoxylated ethoxylated sulfated ethoxylated alcohols, and ethoxylated alkyl phenols. Preferred sulfated surfactants that can be used in the compositions of the present invention include sulfated ethoxylated ethoxylated ethoxylated fatty alcohols, preferably primary monohydric alcohols or linear secondary alcohols with C8-Ci8, preferably C12-C16, alkyl groups and, if ethoxylated, on average about 1-15, preferably 3-12 moles of ethylene oxide (EO) per mole of alcohol, and ethoxylated alkylphenols sulfated with C8-Ci6 alkyl groups, preferably C8-C9 alkyl groups, and on average from 4-12 moles of EO per mole of alkylphenol. The preferred class of sulfated ethoxylated surfactants are the sulfated ethoxylated linear alcohols, such as the C8-Ci8 alcohols ethoxylated with an average of about 1 to about 12 moles of ethylene oxide. A more preferred sulfated ethoxylated detergent was made by sulfating a Ci2-C15 alcohol ethoxylated with 3 moles of ethylene oxide. The anionic surfactant could, for example, be an aliphatic sulfonate, such as primary alkane (e.g., C8-C22) sulfonate, primary alkane disulfonate (e.g., C8-C22), C8-C22 alkane sulfonate, sulfonate of C8-C22 hydroxyalkane, or alkylglycerol sulfonate ether (AGS); or a sulfonate aromatic such as benzene sulfonate. The anionic may also be an alkyl sulfate (e.g., C12-C18 alkyl sulfate) or alkyl ether sulfate (including alkyl glyceryl ether sulfates). Among other alkyl ether sulfates are those having the formula: RO (CH2CH20) nS03 Where R is an alkyl or alkenyl having 8 to 18 carbons, preferably 12 to 18 carbons, n has an average value greater than 1.0, preferably between 2 and 3; and M is a solubilization cation such as sodium, potassium, ammonium or substituted ammonium. Sodium lauryl ether or ammonium ether sulfates are preferred. The anionic surfactant may also be alkyl sulfosuccinates (including mono- and dialkyl, eg, C6-C22 sulfosuccinates); alkyl acryl taurates, alkyl and acyl sarcosinates, sulphoacetates, C8-C22 alkyl sulfates and phosphates, alkyl phosphate esters and alkoxy alkyl esters, acyl lactates, succinates and C8-C22 monoalkyl maleates, sulfoacetates, and isethionates of acyl. Tauratos are usually identified by the formula; R2CONR3CH2CH2S03 M wherein R2 has C8_C2o alkyl range / R3 has C1-C alkyl range and M is a solubilization cation. The acyl isethionates are prepared by the reaction between the alkali metal isethionate with mixed aliphatic fatty acids having from 6 to 18 carbon atoms and an iodine value of less than 20. At least 75% of the mixed fatty acids have 12 at 18 carbon atoms and up to 25%, it has 6 to 10 carbon atoms. Among the anionic surfactants, C8-C28 primary alcohol sulfates are more preferred. Preferred amine oxides include dimethyldodecylamine oxide, oleyl di (2-hydroxyethyl) amine oxide, dimethyloctylamine oxide, dimethyldecylamine oxide, dimethyltetradecylamine oxide, of di (2-hydroxyethyl) tetradecylamine, di (2-hydroxyethyl) tetradecylamine oxide, 3-didodekoxy-2-hydroxypropyl- (3-hydroxypropyl) amine oxide, and dimethylhexadecylamine oxide, more preferably alkyldimethylamine oxide, such as oxide of hexadecyldimethylamine, octadecylamine oxide, lauryldimethylamine oxide and its hydrates. The N-oxide group is a weak base having a pKb of about 9. The amine oxides suitable for use herein were made commercially by different suppliers, including Akzo Chemie and Ethyl Corp. The most preferred amine oxides are they select from the oxide of (C12-C14) alkyl dimethylamine, such as hexadecyldimethylamine oxide, octadecylamine oxide, lauryldimethylamine and its hydrates, more preferably lauryl dimethyl amine oxide. The amphoteric ionic surfactants are exemplified by those which can be broadly described as derivatives of ammonium, phosphonium and aliphatic quaternary sulfonium compounds, wherein the aliphatic radicals can be straight or branched chains, and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic group, e.g., carboxy, sulfonate, sulfate, phosphate or phosphonate. Examples of preferred surfactants contain 4- [N, N-di (2-hydroxyethyl) -N-octadecylammonium] -butan-1-carboxylate; 5- [S-3-hydroxypropyl-S-hexadecylsulfonium] -3-hydroxypentan-l-sulfate; 3- [P, P-diethyl-P-3, 6, 9-trioxatetradexocylphosphonium] -2-hydroxypropan-1-phosphate; 3- [N, -dipropyl-N-3-dodecyloxy-2-hydroxypropylammonium] -propan-1-phosphonate; 3- (N, N-dimethyl-N-hexadecylammonium) propane-1-sulfonate; 3- (N, -dimethyl-N-hexadecylammonium) -2-hydroxypropan-1-sulfonate; 4- [N, N-di (2-hydroxyethyl) -N- (2-hydroxydedecyl) ammonium] -butan-1-carboxylate; 3- [S-ethyl-S- (3-dodecoxy-2-hydroxypropyl) sulfonium] -propan-1-phosphate; 3- [P, P-dimethyl-P-dodecylphosphonium] -propan-l-phosphonate; and 5- [N, -di (3-hydroxypropyl) -N-hexadecylammonium] -2-hydroxy-pentan-l-sulfate. Amphoteric detergents that can be used in this invention include at least one acid group. These may be a carboxyl or sulfonic group. They include quaternary nitrogen and therefore are quaternary amino acids. They should usually include an alkyl or alkenyl group of 7 to 18 carbon atoms. Suitable amphoteric surfactants include amidobetaines and sulfobetaines. Preferred examples of the sulfobetaine include alkylamidopropyl sulphobetaines, alkylhydroxy sulphobetaines, hydroxyl sulphobetaine amides, and propyl sulphobetaine amide, of which lauryl dimethyl hydroxy sulfobetaine, myristyl dimethyl hydroxy sulphobetaine, N, N-dimethyl lauramide propyl-2-hydroxy sulphobetaine, are particularly preferred, and N, N-dimethyl cocamide propyl-2-hydroxy sulfobetaine. Among these, lauryl dimethyl hydroxy sulphobetaine and meristyl dimethyl hydroxyl sulphobetaine are more preferred. Preferred examples of the botaina nests include propyl betaine caramide and cocamide propyl betaine. Nonionics that can be used include in particular the reaction products of the compounds having a hydrophobic group and a reactive hydrogen atom, for example aliphatic alcohols, acids, amides, or alkylphenols with alkylene oxides, especially ethylene oxide either alone or with propylene oxide. The specific non-ionic detergent compounds are condensates of ethylene oxide-C6-C22 alkyl phenols, the condensation products of linear or branched primary or secondary aliphatic alcohols (C8-Ci8) with ethylene oxide, and the products made by the condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other nonionic detergent compounds so called include long chain tertiary amine oxides, long chain tertiary phosphine oxides and dialkyl sulfoxides. The nonionics can also be an amide sugar, such as a polysaccharide amide. Preferred alkyl polysaccharides are alkyl polyglycosides of formula; R20 (CnH2nO) t (gucosil) x; wherein R2 is selected from the group consisting of alkyl, alkylphenyl, hydroxyalkyl, hydroxyalkylphenyl, and mixtures thereof wherein the alkyl groups contain from about 10 to about 18, preferably from 12 to about 14, carbon atoms; n is from 0 to 3, preferably 2; t is from 0 to about 10, preferably 0; and x is from 1.3 to about 10, preferably from 1.3 to about 2.7. The glucosyl is preferably derived from glucose. To prepare these compounds, the alkylpolyethoxy alcohol or alcohol is first formed and then reacted with glucose, or a source of glucose, to form the glucoside (linkage at position 1).

The additional glycosyl units can then be linked between their position 1 and the preceding glycosyl units in the 2, 3, 4, and / or 6 position, preferably predominantly in the 2-position. Preferred non-ionic surfactants used in the compositions of the present invention include ethoxylated fatty alcohols, preferably linear primary or secondary monohydric alcohols with Cio-Cis alkyl groups, preferably Ci2-Ci6 and on average about 1-15, preferably 3-12 moles of ethylene oxide (EO) per mole of alcohol, and alkylphenols ethoxylated with C8-Ci6 alkyl groups, preferably Cg-Cg alkyl groups, and on average about 4-12 moles per EO per mole of alkylphenol. The preferred class of nonionic surfactant compounds are ethoxylated linear alcohols, such as ethoxylated Ci.sub.2 -C.sub.6 alcohols with an average of from about 1 to about 12 moles of ethylene oxide. A preferred non-ionic detergent is a C 12 -C 15 alcohol ethoxylated with 3 moles of ethylene oxide. The non-ionic surfactant should be liquefied, eg, at elevated temperatures up to about 90 ° C, to facilitate the processing of the bar-like soap composition. Other nonionic compounds which are suitable are the polyoxyalkylene esters of the organic acids 4 such as the higher fatty acids, the resin acids, the resin acids of cellulose liquors, or the acids of the products of the oxidation of oil. These esters will usually contain from about 10 to about 22 carbon atoms in the acid radical and from about 12 to about 30 moles of ethylene oxide or its equivalent. Still other nonionic surfactants are the condensates of the alkylene oxide with the higher amide fatty acids. The fatty acid group will usually contain about 8 to about 22 carbon atoms, and this will condense with about 10 to about 50 moles of ethylene oxide. The corresponding carboxamides and sulfonamides will also be used as substantial equivalents. The higher aliphatic oxyalkylate alcohols are the preferred nonionic surfactants for the compositions according to the present invention, the fatty alcohols must contain at least 6 carbon atoms, and preferably at least about 8 carbon atoms. The most preferred alcohols are lauryl, myristyl, cetyl, and oleyl alcohols, and the alcohols must be condensed with at least 6 moles of ethylene oxide. A typical non-ionic product is Ci2-Ci3 aliphatic alcohol condensed with about 6.5 moles of ethylene oxide. The corresponding alkyl mercaptans when condensed with ethylene oxide are also suitable in the compositions of the present invention. As the specific non-ionic surfactants were exemplified, mention was made of dinonyl phenol + 15 E.O. (1 mol of dinonyl phenol reacted with 15 moles of ethylene oxide), dodecyl mercaptan + 10 E.O., lauramide + 8 E.O. stearic acid + 20 E.O., tetradecyl amine + 14 E.O., dodecyl sulfonamide + 6 E.O., and myristyl alcohol -1-10 E.O. Preferred are the condensation products of one mol of alkanol, preferably straight-chain and primary, from about 9 to 20, especially from 10 to 18, carbon atoms with from about 4 to 20, especially from 5 to 15, moles of oxide of ethylene, which are represented for example by Neodol 23-65 (C12-13 alkanol + 6.5 EO) and Neodol 45-13 (C4-15 alkanol + 13 EO). Mixtures of the above synthetic detergent of the surfactant type, eg, of anionic and nonionic surfactants, or different specific anionic or nonionic surfactants can be used to modify the detergency, foaming characteristics, and other properties of the composition. As indicated in the following examples, inclusion of these surfactants in the extrudable detergent compositions of the present invention allows for better resistance to cracking with moisture and also provides the desired foaming profile to the composition. Specific advantages have been observed when the detergent composition can be extruded with the surfactant. It is preferred that the surfactant include a mixture of anionic and nonionic surfactants, especially a mixture of a anionic surfactant, preferably an alkali metal salt of C8-Ci8 primary alcohol sulfate and an amine oxide. In addition to the above essential ingredients, the detergent composition of the present invention may also comprise any or all of the following ingredients used to increase shelf life, aesthetics or simply functionality; vitamins such as vitamin A and E, and vitamin alkylesters such as alkyl esters of vitamin C; lipids such as cholesterol, cholesterol esters, lanolin, ceramides, sucrose esters, and pseudo-ceramides; materials that form liposomes such as phospholipids, and suitable amphiphilic molecules that have two long hydrocarbon chains; essential fatty acids, polyunsaturated fatty acids, and sources of these materials; triglycerides of unsaturated fatty acids such as sunflower oil, evening primrose oil, avocado oil, almond oil; vegetable butters formed with mixtures of saturated and unsaturated fatty acids such as shea butter; mineral such as zinc, magnesium and iron sources; skin conditioners such as silicone oils, gums and modifications thereof such as linear and cyclic polydimethylsiloxanes, amino, alkyl, and alkylaryl silicone oils; hydrocarbons such as liquid paraffins, petrolatum, petrolatum, microcrystalline wax, ceresin, squalene, pristan, paraffin wax, and mineral oil; conditioning proteins such as milk proteins, silk proteins and glutins; Cationic polymers are conditioners that can be used include conditioners of the type Quatrisoft LM-200 Polyquaternium-2, Merquat Plus 3330-Polyquaternium 39; and Jaguar®; humectants such as glycerol, sorbitol and urea emollients such as the esters of long chain fatty acids, such as isopropyl palmitate and cetyl lactate. In addition to the above, the composition may also include a deep cleansing agent. These are defined herein as ingredients that may either increase the emission of freshness immediately after cleaning or may provide a continuous effect on the skin problems that are associated with incomplete cleaning. Deep cleansing agents include: Antimicrobial agents such as 2-hydroxy-4, 2 ', 4' -trichlorodiphenylether (DP300), 2,6-dimethyl-4-hydroxychlorobenzene (PCMX), 3,4,4'-trichlorocarbanilide (TCC), 3-trifluoromethyl-4,4'-dichlorocarbanilide (TFC), benzoyl peroxide, zinc salts, tea tree essential oil. Other optional agents include anti-acne agents, such as salicylic acid, lactic acid, glycolic acid, and citric acid, and benzoyl peroxide (also an antimicrobial agent); agents for the control of oil including suppressors of sebum, matifiers such as silica, titanium dioxide, oil absorbers, such as microsponges, astringents such as tannins, zinc and aluminum salts, plant extracts such as green tea and Scottish elm. { Hammailes); rubbing and peeling particles, such as polyethylene spheres, agglomerated silica, sugar, fruit bone, seeds and husks such as nuts, peaches, avocados, and oats, salts; cooling agents such as menthol, and its different derivatives and lower alcohols; fruit and herbal extracts; mitigating agents for skin irritation such as aloe vera; essential oils such as mint, jasmine, camphor, false American white cypress, sour orange rind, rye, turpentine, cinnamon, bergamot, Citrus unshiu, calamus, pine, lavender, laurel, clove, Japanese cypress, eucalyptus, lemon, borage, thyme, mint, black mint, rose, real sage, menthol, cineole, eugenol, citral, citronella, borneol, linalool, geraniol, evening primrose, camphor, thymol, espirantol, penene, limonene and terpenoid oils; Sunscreens such as 4-tert-butyl-1-methoxy dibenzoylmethane (available under the trademark of PARSOL 1789 from Givaudan) and / or 2-ethylhexyl methoxy cinnamate (available under the registered trademark PARSOL MCX from Givaudan) can also be integrated. other sun blockers UV-A and UV-B. Other beneficial agents that may be employed include anti-aging compounds and skin bleaching agents, Antioxidants such as, for example, butylated hydroxytoluene (BHT) can be advantageously used in amounts of about 0.01% or greater, if appropriate. Another ingredient that can be incorporated are physical exfoliants such as polyoxyethylene beads, walnut shells and apricot seeds. The incorporation of these physical exfoliants increase the benefits, greater and better to the chemical exfoliation provided by the alpha-hydroxy acids. These additional benefits are highly desired by consumers. The particle size of the exfoliants preferably falls between 50 micrometers to 1000 micrometers, more preferably 100 micrometers to 500 micrometers and more preferably 100 to 200 micrometers. A final group of optional ingredients are the optical modifiers that are defined as materials that modify the optical texture or introduce a pattern to increase the distinctive quality of the bar. Examples of suitable optical modifiers include: Stains / pieces such as fruit hearts, seeds, polyethylene beads, mineral agglomerates, and vegetable sponge; particles similar to a reflector dish such as mica; agents for the formation of pearlescence as coated micas, and certain waxes; Wax / plastic slices that look like fruit slices; slices of vegetables or fruit, matifiers such as T1O2 and mixtures of the above.

In addition, the composition of the bar of the invention can include from 0 to 25% by weight of amorphous or crystalline aluminum hydroxide. Aluminum hydroxide can be generated in situ by reacting the fatty acids and / or non-fatty monocarboxylic acids with sodium aluminate, or can be prepared separately by reacting the fatty acids and / or mono- or polycarboxylic acids non-fatty with sodium aluminate and adding the product of the reaction to the soap. Another class of curing agents are insoluble mineral or inorganic solids which can structure the discontinuous phase by forming the network or filling space. These include fumed, precipitated or modified silica, alumina, calcium carbonate, kaolin and talc. Aluminum-silicate clays, especially synthetic or natural hectorites, can also be used. In addition to the beneficial agents, suitable rod structurants that provide integrity to the bar can also be used. Also water insoluble structurants have a melting point in the range of 40-100 ° C, more preferably at least 50 ° C, notably 50 ° C to 90 ° C. Suitable materials that are particularly intended are fatty acids, in particular those having a carbon chain of 12 to 24 carbon atoms. Examples are lauric, myristic, palmitic, arachidic, and behenic acids and mixtures thereof. The sources of these fatty acids are coconut, green coconut, palm, palmiste, babassu, and tallow fatty acids or distilled fatty acids. Other water-insoluble structurants include alkanols of 8 to 20 carbon atoms, particularly cetyl alcohol. These materials generally have a solubility in water less than 5g / liter at 20 ° C. Other structurants may include solid particles such as talc, starch (eg, maltodextrin) or clay. The relative proportions of the water soluble structurants govern the relationship with which the bar wears with use. The presence of water-insoluble structurants tends to delay the dissolution of the stick exposed to water during use and thereby retard the rate of wear. In addition, the composition may be made of multiple colors, eg, scratched, with judgment use in the dye, which is well known in the art. The beneficial agents generally comprise about 0-25% by weight of the composition, preferably 5-20%, and more preferably between 2 and 10%. Finally, the compositions of the bar of the invention comprise about 1 to 15%, preferably 2 to 12%, more preferably 3 to 12% by weight of water. The compositions of the bar of the invention have pH of about 6 to 11, preferably above 7. Essential beneficial agents of the present invention can be added at any stage in the processing of the bar since the component is not subject to the processing stages causing its degradation. The components can be added as acid-free or salt dependent on the pH of the medium, that is, with an acid-free alkaline active material can be added to form the salt in the bar. In preparing the bars of the present invention, the components of dicarboxylic acid, alpha-hydroxy acid and non-cationic surfactant can be incorporated into the soap at any processing step to form the stick, preferably by mixing with the soap chips prepared in the Crutcher. or, more preferably, the amalgamator. According to another feature of the invention, the dicarboxylic acid and alpha-hydroxy components are first dissolved or dispersed in the liquid or liquefied surfactant (eg, by heating to about 90 ° C if necessary) and the solution The resultant (or dispersion) is then mixed with the soap containing the composition with the fatty acid salt, followed by conventional extrusion and compressed in the form of a stick. The surfactant included in the detergent composition of the present invention improves its solubility and the properties of foaming in use with water, especially cold, hard water, exerts an emollient or anti-irritation effect on the skin, which causes the soap composition is processed more easily, plastic and economically in bars. The dissolved dicarboxylic acid previously and the alpha-hydroxy acid in the surfactant further facilitates uniform mixing in the soap composition. The soap bars can be prepared either by neutralization or saponification. If the fatty acid is used, it can be introduced into the mixture in multiple ways. Fatty acids, for example, can be added directly into the mixer and melted. A second method is to combine the ingredients starting with the use of previously formed soap needles and mixing the ingredients well below the melting temperature of the soap (eg, 50 ° C). Pre-formed soap needles can be added to the Z-type paddle mixer (or a similar mixer that provides sufficient mixing action to mix the materials) and then add the alpha-hydroxy acid salt and salt dicarboxylic acid, as described above. As long as ingredients are mixed until homogeneous, the material can be cooled, milled, extruded and subsequently compressed. The procedure for combining these materials is very flexible. One way to combine the ingredients is to weigh a certain amount of soap needles (formed by a conventional process by mixing the ingredients, cooling and refining them), heat them and mix them at approximately 40 ° C, add the salt-hydroxy acid ( eg, sodium lactate) followed by the acid salt dicarboxylic, eg, bipotassium sebacate). The dough can then be ground and processed into bars. The bar may be in the form of a single-phase bar or a multi-phase bar, commonly also known as variegated detergent bars, which usually have at least 2 different phases in the bar, which may be, for example, in the form of extruded square bars. Multi-colored or multi-phase soaps have been described in different terms including variegated, mottled, striated and strip. Another way to prepare the formulation is to prepare the entire dough in a single batch under melting conditions. The bars described in this application can be prepared using manufacturing techniques described in the literature and known in the art for the manufacture of toilet soap bars. Examples of these types of manufacturing processes available are given in the Book Soap Technology for the 1990 's (Edited by Luis Spitz, American Oil Chemist Society Champaign, and Illinois, 1990). This includes widely: melt formation, extrusion / stamping, and extrusion, tempering, and cutting. Extrusion and embossing is a preferred process due to its ability to economically produce high quality bars suitable as toilet soap. The invention can be put into practice in different ways and different specific modalities will be described to illustrate the invention with reference to the accompanying examples. All amounts and proportions referred to herein and in the appended claims are by weight unless otherwise indicated.

Experiment 1 Different detergent compositions 1-7 were made in the form of soap bars. The final composition of these bars was tabulated in table 1 below, while the panel records were tabulated in table 2.

Table 1 • Soap needles containing 80 parts of non-lauric soap and 20 parts of lauric soaps. They had 77% of TFM, 16% moisture and volatile and 0.4% insoluble in alcohol. Ex-Jocil Industries, India. SLS is Sodium Lauryl Sulfate (90% pure) Ex-Galaxy Surfactants DMLO is Dimethyl Lauryl Amine Oxide (28% aqueous solution) Ex-Galaxy surfactants Sodium Lactate (60% aqueous solution) Ex-Lactochem India Bipotassium Sebacate Ex-FDL UK powder Polymer beads - 100 mesh polyethylene beads, from Micropowders INC USA.

Table 2 Registration method The soap bars were washed under conditions controlled by a panel of 5 operators trained for 4 successive days, each operator handling each bar one per day. A single wash involved immersing the tablet in approximately 2 liters of water (changed for each tablet) for 15 seconds and then changing and carving the tablet by the edges in the hand at 180 degrees, 40 times. The tablet was submerged for 15 seconds after 20 times and rotated again at the end of the operation. Daily readings after drying and reading on the last day evaluated cracking on a scale of 0-14 where 0 represents no cracking while 14 represents very severe cracking, with an increasing degree of cracking. A cracking record of 0 is more desirable and is preferred over cracking records of 0.1 or 0.2 and greater. From table 2 above, it is clear that when the compositions had no surfactant or high surfactant (6%), the cracking records were unacceptable (lots Nos. 1, 2, 5 and 6). While the lots within the invention 3, 4 and 7 showed cracking records of 0. An illustrative procedure for making detergent compositions in the form of ground and extruded soap bars is given below. The following ingredients were used to make the soap bars, as in Table 3 below. All the ingredients are in Kg.

Table 3 Soap needles 910 Glycerin 5 SLS 25 DMLO 10 Parsol MCX 1 Sodium lactate 20 Bipotassium sebacate 15 Titanium dioxide 3 Tinopal 0.2 Extracts 1 Perfume 15 Polymer pearls 1 Colorant 0.7 Total 1000 Soap needles containing 80 parts of non-lauric soap and 20 parts of lauric soaps. They had 77% of TFM, 16% of humidity and volatile and 0.4% of insoluble in alcohol. Ex-Jocil Industries, India. Glycerin (99% pure) Ex-Jocil Industries SLS is Sodium Lauryl Sulfate (90% pure) Ex-Galaxy Surfactants DMLO is Dimethyl Lauryl Amine Oxide (28% aqueous solution) Ex-Galaxy surfactants Sodium Lactate (aqueous solution to 60%) Ex-Lactochem India Sebacato bipotassium powder Ex-FDL UK Polymer beads - 100 mesh polyethylene beads, from Micropowders INC USA.

• Extracts - Mix of extracts of Fruits and Turmeric (Extrapone Curcuma) and (Extrapone fruits) from Symrise India Process: The soap needles were placed in a mixer and then mixed with SLS for 3 minutes. After they were converted to fine powder, polymer beads were added followed by sodium lactate and Parsol MCX. The dough was mixed for 3 minutes and the solid additives such as titanium dioxide, Tinopal, and dipotassium sebacate were added to the dough. After mixing for 2 minutes the extracts were added and mixed for another 2 minutes. The dyes and the perfume were added and mixed for 2 minutes. The composition was then milled followed by slow and stamping movement. The present invention thus provides an extrudable detergent composition comprising multiple beneficial agents such as alpha-hydroxy acids and dicarboxylic acids, these compositions when extruded in the form of sticks, remain resistant to cracking by moisture, a situation , which is not otherwise acceptable to the consumer. Although the basic principle of the method of this invention has been illustrated and described herein, it will be appreciated by persons skilled in the art that variations in the disclosed arrangement, as well as in its details and also the organization of these details, can be done without departing from the perspective and scope of this. Accordingly, it is intended that the above disclosure and the examples be considered only illustrative of the principles of the invention and not constructed in a limiting sense. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (9)

2. Having described the invention as above, the content of the following claims is claimed as property: 1. Extrudable detergent composition, characterized in that it comprises i. 20% to 80% by weight of soap; ii. 0.5% to 5% by weight of surfactant selected from anionic, nonionic, amphoteric, betaine or ionic surfactant surfactants; iii. 0.1% to 10% by weight of water-soluble salt of dicarboxylic acid having the formula COOH- (CH2) n -COOH where "n" is an integer from 2 to 8; iv. 0.1% to 10% by weight of water-soluble salt of alpha-hydroxy acid. 2. Extrudable detergent composition according to claim 1, characterized in that the surfactant includes a mixture of anionic surfactant and nonionic surfactant.
3. 3. Extrudable detergent composition according to claim 2, characterized in that in the mixture, the anionic surfactant is present from 2% to 4% and the non-ionic surfactant is present up to 1% by weight.
4. 4. Extrudable detergent composition in accordance with claim 2 or 3, characterized in that the anionic surfactant is an alkali metal salt of Ce-Cis primary alcohol sulfate and the non-ionic surfactant is an amine oxide.
5. 5. Extrudable detergent composition according to any of the preceding claims, characterized in that the dicarboxylic acid is selected from adipic acid, azelaic acid, or sebasic acid.
6. 6. Extrudable detergent composition according to claim 5, characterized in that the dicarboxylic acid is sebasic acid.
7. 7. Extrudable detergent composition according to any of the preceding claims, characterized in that the alpha-hydroxy acid is selected from glycolic acid, lactic acid, malic acid, citric acid, or tartaric acid.
8. 8. Extrudable detergent composition according to claim 7, characterized in that the alpha-hydroxy acid is lactic acid.
9. 9. Extrudable detergent composition, characterized in that it is substantially as described herein with reference to the accompanying examples.