KR950013914B1 - Mild skin cleaning soap bar with hydrated cationic polymer - Google Patents

Abstract

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Description

Skin Cleansing Soap Bar Containing Hydrated Cationic Polymer

The present invention relates to a skin cleansing soap bar composition comprising a cationic polymer.

Cleaning skin using surface active cleansing agents has been of great interest. Many people wash their skin several times a day with various surfactants. An ideal skin cleanser should be gently cleansed with little or no irritation while keeping the skin elastic even after degreasing the skin to make it too dry or after routine use. Most foam soaps, liquids or bars are not satisfactory in this regard.

As background, the benefits of reduced skin irritation measured by patch testing of cationic and nonionic types of polymers are described in "Polymer JR for Skin Care" Bulletin, by Union Carbide, 1977. Cationic polymers have been reported to be preferred over other polymers because they have a better feel to the skin.

Japanese Patent No. (SO) -58 (1983) 167700 to Ohhat et al teaches a soap bar containing 0.1 to 6% of cationic poly (diethyldiallyl ammonium chloride) and copolymers thereof. . Ohata et al. Recognized the problems associated with the use of other cationic polymers and taught the exclusion of the use of other polymers, including JR 400.

Parran, Jr., US Pat. No. 3, 761, 418 (September 25, 1973), discloses a detergent composition containing a particle deposition enhancer comprising a mixture of certain cationic polymers that are water insoluble. Described. No hydrated cationic guar gum polymer is mentioned. Example XV in Faren II's patent specification is a 50:50 tallow / coconut (T / CN) fatty acid soap bar containing 3% cationic polymer. However, no method of making such bars is described. Orshitzer / Macander, US Patent No. 4, 012, 341, issued March 15, 1977, describes all synthetic detergent shampoo bars, including mixtures of anionic and nonionic detergents. . The bars of Examples 2 and 4 contain 1% JR 400. Cationic guar gum polymers are not taught.

In US Pat. Liquid skin cleansers containing together are described.

Turney's European Patent Application No. 106, 193, published April 25, 1984 and assigned to Union Carbide Corporation, teaches liquid skin cleaners containing anionic detergents, fatty acid soaps and cationic polymers. Soap bars are not taught anywhere in the literature of Styros and Tuni.

British Patent Application No. 2094307A, published on September 15, 1982 and assigned to Johnson & Johnson Baby Products Company, describes amphoteric fatty acid complexes of detergent products with good foaming and low eye irritation. These documents teach that anionic surfactants should not exceed 20% to reduce ocular irritation. Also taught are cationic polymers JR at levels of 0.5 to 3.0%. Liquids and bars are also described. However, cationic guar gum polymers are not described, and no mildness to the skin is also described.

Further, the idea Shah user U.S. Patent No. 4, 234, 464 arc performed in (Morshauser), issued November 1980 18th example 6, 45% isethionate, 5% alkyl amide, (C ₁₈₎ stearic acid 37.5% A detergent synthesis bar is described which consists of 5.0% hydrogenated tallow glyceride and 1% polymer JR. In addition, these patents describe a wide range of synthetic surfactants and fatty substances. Synthetic bars comprise up to 5% "factually non-hazardous" soaps and up to 1.5% cationic polymer. However, no cationic guar gum is mentioned.

James J., issued January 1, 1985. U.S. Patent Nos. 4, 491, 539 to James J. Hoskins and Adrian Kessler include about 5-30% surfactant, about 0.1-1.0% guar substance, about 0.15-1.0 nonionic carboxy-vinyl polymer Liquid cleaning products comprising about 1.0% and water are described. Soap bar compositions are not described. Another document is Colgate's British Patent No. 2, 103, 236A (February 16, 1984), wherein a liquid detergent containing a mixture of ternary surfactants comprising guar gum and betaine is described. It is. In addition, British Patent No. 2, 114, 994A (September 1, 1983) to L'Oreal describes cleaning products based on acyl isethionates and cationic polymers. This product is not soap based.

Although cationic polymers are known to provide conditioning properties for hair and skin, none of the above documents describe the use of low levels of hydrated cationic guar gum polymers in soap based bars. The fact that the important properties (bubble and volume, cleaning properties, soap bar touch, etc.) of soap bars suitable for use are preserved in the presence of a polymer is not described in any patent. In order to improve the softness while maintaining the desirable properties of the soap bar, the fact that the hydrated cationic guar gum polymer must be well hydrated, then incorporated into and dispersed in the soap bar is not described in any patent.

Surprisingly, it has been unexpectedly found that low levels of hydrated cationic guar gum polymer provide the soap-based bars with almost the same softness as synthetic bar products based on soft synthetic surfactants while maintaining the desirable properties of bar soaps. It is also unexpected that it is necessary to hydrate cationic guar gum polymers to incorporate cationic guar gum polymers into soap bars so as to maintain their properties and provide softness.

The present invention relates to a cosmetic skin cleansing bar composition having improved softness to the skin. Accordingly, one object of the present invention is to provide a method for preparing a cosmetic skin cleansing bar composition comprising a hydrated cationic polymer with improved softness to the skin.

Another object of the present invention is to provide a physical composition of a cosmetic skin cleansing bar with improved feel and softness to the skin, wherein the polymer is well hydrated and evenly distributed in the soap bar.

Another object of the present invention is to provide a method of more effectively using cationic skin conditioner in a soap bar.

Other objects are apparent from the following detailed description.

According to the present invention a soft skin cleansing soap bar composition comprising 1) 50 to 90% of a soap and 2) a hydrated cationic polymer skin conditioner is described. The physical composition of this bar is that the hydrated polymer is almost uniformly distributed in the soap and well incorporated. The softness of the soap bar is improved to a level close to the softness of the bars made with very soft synthetic surfactants while maintaining the desirable physical properties of the soap bar by the hydrated cationic polymer.

Soap bars of the present invention contain an effective amount of a "hydrated" cationic polymer that contains at least 50% soap as the main or sole surfactant and, as an essential ingredient, significantly improves the softness of the corresponding soap bar that does not contain a hydrated polymer. It contains. The softness obtained is similar to the softness of the product based on a soft synthetic surfactant. The use properties of the pure soap bar and the high level of acceptable physical properties are retained in the bar. The polymer is hydrated and then uniformly dispersed and incorporated into the soap bar. As used herein, the term “cationic polymer” includes cationic polymers that are naturally or synthetically derived. Unless stated otherwise, the abbreviation "CN" means coconut and "T" means tallow. All percentages and ratios are by weight unless otherwise indicated.

The soap bar according to the invention comprises a suitably hydrated cationic polymer having a molecular weight of about 1000 to about 3,000,000, preferably a suitably hydrated cationic polymer selected from cationic guar gums having a molecular weight of 2,500 to 350,000. 5%, preferably 0.5 to 2%.

In addition, the soap bar of the present invention comprises about 50-90% soap, preferably at least 25% tallow soap. Preferred embodiments of the present invention comprise 50 to 80% of a T / CN fatty acid soap mixture.

In addition, preferred soap bars of the present invention comprise about 2 to 17% of a humectant, preferably a humectant selected from the group consisting of glycerin, free fatty acids and mixtures thereof. More preferred of the present invention comprises at least 4% moisturizer.

In the method of making the bar of the present invention, the cationic polymer is hydrated with water during the manufacturing process of the soap bar and then mixed with the soap. Hydration of the polymer with several cationic polymers produces a flowable liquid. Using other cationic polymers, such as cationic guar gums, produces a hard gel that can be reduced to smaller sized particles. In both cases there are very few unhydrated polymer masses, and the hydrated polymer is easily incorporated into the soap mixture and evenly distributed. The homogeneous distribution of the polymers maintains acceptable levels of use of the soap bars.

[Surfactants]

Fatty acid soaps, which are an essential component of the present invention, are alkali metal soaps of fatty acids having an alkyl chain length of C ₈ to C ₂₂ , preferably C ₁₂ to C ₁₈ , particularly preferably C ₁₀ to C ₁₄ , which are rapidly foamed. It is important to produce high quality and acceptable quality at high levels. Coconut soap is replaceable with palm kernel oil soap. Fatty acid soaps are present at levels of 50-90%, preferably 60-80%, most preferably 65-70%. Preferred ratio of tallow / coconut soap of soap is 0.1: 1 to 9: 1, preferably 1: 1 to 1.5: 1.

The soap bar of the present invention may comprise up to 20% synthetic surfactant. If synthetic surfactants are included, soft synthetic surfactants are preferred. Gentle synthetic surfactants are defined herein as synthetic surfactants that relatively impair the blocking action of the stratum corneum. Gentle surfactants are present in the compositions of the present invention at levels of 0-20%, preferably about 2-15%. The ratio of soap: synthetic surfactant in the mixture of fatty acid soaps and soft surfactant is 2.5: 1 to 37: 1, preferably 2.5: 1 to 14: 1, most preferably 6.5: 1 to 14: 1.

Some of the soft synthetic surfactants useful and preferred for the present invention include alkyl glyceryl ether sulfonates (AGS), anionic acyl sacosinates, methyl acyl taurates, N-acyl glutamate, alkyl glucosides, acyl isethionates, alkyl sulfostones Sinate, alkyl phosphate esters, ethoxylated alkyl phosphate esters, alkyl ether sulfates, methyl glucose esters, protein condensates, mixtures of alkyl ether sulfates with alkyl amine oxides, betaines, taines and mixtures thereof. Alkyl ether sulfates containing 1 to 12 ethoxy groups, in particular ammonium and sodium lauryl ether sulfate, are also included in these surfactants. The alkyl chain length of these surfactants is C ₈ to C ₂₂ , preferably C ₁₀ to C ₁₈ . The most preferred soft surfactant is sodium CN AGS.

[Moisturizer / Softener]

Moisturizers may be included to provide skin conditioning properties and to improve the softness of the product. The moisturizers to be incorporated into the product are selected for their level and type so as to provide excellent moisturizing and foaming effects without adversely affecting the stability and use properties of the product.

The term "moisturizer" is often used in the cosmetic industry without being precisely defined. It is sometimes used synonymously with the softening agent and means a substance that provides a smooth and soft touch to the surface of the skin.

There are two ways to reduce water loss from the stratum corneum. One method is to provide an inclusion layer on the skin surface that reduces the evaporation rate. The second method is to retain moisture by incorporating non-inclusion and wettable materials into the stratum corneum, and to make this moisture useful in the stratum corneum to change its physical properties and produce a cosmetically desirable effect. In addition, non-inclusion moisturizers act to improve skin slippery.

Both moisturizers, both inclusion and non-inclusion, are suitable for use in the present invention. Examples of humectants include long chain fatty acids, water soluble liquid polyols, glycerin, propylene glycol, sorbitol, polyethylene glycol, ethoxylated / propoxylated ethers of methyl glucose (e.g. methyl glutet-20) and ethoxylated / propoxylated lanolin alcohols. Ethers such as soluran-75.

When moisturizers are used in the compositions of the invention, they are used at levels of about 2 to about 20% by weight of the composition. The level of humectant is preferably 4 to 15%, more preferably 8 to 12%. Preferred humectants are coconut and tallow fatty acids. Other preferred moisturizers are non-inclusion and water soluble liquid polyols such as glycerin and essential amino acid compounds originally present in the skin. The most preferred moisturizer is a mixture of coconut fatty acid and glycerin with a ratio of coconut fatty acid to glycerin of 2: 1 to 0.5: 1.

The ratio of total surfactant (ie soap and synthetic surfactant, if used) to the moisturizing agent is preferably between 4: 1 and 39: 1, more preferably between 9: 1 and 20: 1.

Other preferred non-inclusion moisturizers are compounds found to be naturally present in the stratum corneum of the skin, such as sodium pyrrolidone carboxylic acid, lactic acid, urea, L-proline, guanidine and pyrrolidone. Examples of other non-inclusion moisturizers include hexadecyl, myristyl, isodecyl or isopropyl esters of adipic acid, lactic acid, oleic acid, stearic acid, isostearic acid, myristic acid or linoleic acid, as well as various alcohol esters that are elevated thereto (eg : Sodium isostaroyl-2-lactylate, sodium capryl lactylate), hydrolyzed proteins and other collagen-derived proteins, aloe vera gel and acetamide MEA (acetenoethanolamide).

Other examples of moisturizers in inclusion and non-inclusion forms are described in "Emollients-A Critical Evaluation", by J. Mausner, Cosmetics & Toiletries, May 1981, which is incorporated herein by reference.

Cationic Polymer

Cationic polymer skin conditioners essential for the present invention include (i) cationic polysaccharides, (ii) cationic copolymers of sugars with synthetic cationic monomers, and (iii) (A) cationic polyalkylene imines, (B) cations With ethoxy polyalkylene imines and (C) cationic poly [N-[-3- (dimethylammonio) propyl] -N '-[3- (ethyleneoxyethylene dimethylammonio) propyl] urea dichloride] It is selected from the group consisting of synthetic polymers selected from the group consisting of.

The amount of hydrated cationic polymeric skin conditioner found to be useful in the compositions of the present invention is from about 0.2 to about 5%, preferably from about 0.5 to about 2%, based on the weight of the unhydrated polymer. Such bar soap compositions containing relatively small amounts of polymers provide significantly improved clinical softness compared to compositions containing no polymers. The softness obtained is similar to the softness of synthetic-based skin cleansing products (specific synthetic bars are generally known to be softer than soap based, in particular short based fatty acid soaps). The improved softness is also evidenced by the improved barrier action of the stratum corneum as compared to the product free of polymers, as confirmed by measuring the loss of moisture through the skin. In addition, the cationic polymer used in the present invention provides a desirable soft and smooth feel of use. Positively charged polymers appear to combine with negatively charged sites on the skin to provide a soft skin feel after use.

Cationic polymers used in the present invention provide softness while maintaining acceptable levels of acceptable soap bars, such as foam properties and creaminess, foam volume, cleaning properties, skin feel, fragrance, bar feel and the like. . This is unexpected because cationic polymers have a significantly negative effect on the properties of use, especially when used at levels higher than normally required to improve softness and when not used through the hydration described in the present invention. It is true. For example, they compress the foam volume and change the properties, resulting in the formation of granular bar structures, poor detergent properties, and adversely affect the aroma.

In the composition of the present invention, it is important that the cationic polymer is uniformly distributed throughout the soap bar. Hydration of cationic polymers is essential for uniform distribution. Some cationic polymers are commercially available in hydrated form, while others are commercially available in unhydrated form. Distributing the polymer evenly to the bars allows the polymer to be readily deposited on the skin to improve clinical softness. This distribution helps to maintain acceptable levels of use of soap bars (eg skin feel, good foam, smoothness of the bar and prevention of cracking of the bar when drying).

(I) cationic polysaccharides

Cationic polysaccharides include polymers based on pentasaccharide or hexasaccharide and derivatives made cationic by bonding cationic moieties to the backbone of the polysaccharide. It consists of one kind or more than one kind of sugar, ie a copolymer of said derivatives and cationic materials. The monomers may be present in linear or branched geometric arrangement. Cationic polysaccharide polymers include cationic cellulose and hydroxye cellulose; Cationic starch and hydroxy alkyl starch; Cationic polymers based on arabinose monomers, such as cationic polymers that can be derived from arabinose vegetable gums; Cationic polymers derived from xylose polymers found in materials such as wool, straw, cottonseed husk and corncobs; Cationic polymers derived from fucose polymers found to be cell wall components of seaweed; Cationic polymers derived from fructose polymers such as inulin found in certain plants; Cationic polymers based on acid-containing sugars such as galacturonic acid and glucuronic acid; Cationic polymers based on amine sugars such as galactoseamine and glucoseamine; Cationic polymers based on 5- and 6-membered ring polyalcohols; Cationic polymers based on galactose monomers present in plant gums and gum grass; Cationic polymers based on mannose monomers found in plants, yeast and red algae; Cationic polymers based on galactomannan copolymers known as guar gums obtained from the endosperm of guar beans are included.

Specific examples of cationic polysaccharides include cationic hydroxyethyl cellulose JR400 (Union Carbide Corporation), cationic starch Stalok ^R 100,200,300 and 400 (Staley, Inc.), galactasol 800 Cationic galactomannan (Henkel, Inc.) and Jaguar Series (Celanese Corporation) based on the series of guar gums.

(II) Cationic Copolymers of Sugars and Synthetic Cationic Monomers

Cationic copolymers of sugars useful in the present invention with synthetic cationic monomers include those containing the following sugars: glucose, galactose, mannose, arabinose, xylose, fucose, fructose, glucoseamine, Galactoseamine, glucuronic acid, galacturonic acid and 5- or 6-membered ring polyalcohols. Also included are hydroxymethyl, hydroxyethyl and hydroxypropyl derivatives of the sugars described above. When the sugars are bonded to each other by copolymers, they may be bound in various arrangements (eg, 1,4-α; 1,4-β; 1,3-α; 1,3-β; and 1.6 bonds). . Synthetic cationic monomers for use in such copolymers include dimethyldiallyl ammonium chloride, dimethylaminoethylmethacrylate, acrylamide, diethyldiallyl ammonium chloride, N, N-diallyl, N, N-dialkyl ammonium halides Etc. may be included.

Examples of copolymers of sugars with synthetic cationic monomers include cellulose derivatives (such as hydroxyethyl cellulose) and N, N-diallyl, N, N-dialkyl ammonium chlorides [trade name: Celquat; Manufacturer: National Starch Corporation.

(III) Cationic Synthetic Polymer

Cationic synthetic polymers useful in the present invention include cationic polyalkylene imines, ethoxypolyalkylene imines and poly [N-[-3- (dimethylammonio) propyl) -N'-3 (ethyleneoxyethylene dimenylammonium). O) propyl] urea dichloride] [trade name: Miranol A-15, CAS Reg. No. 68555-36-2; Manufacturer: Miranol Chemical company, Inc.].

Preferred cationic polymeric skin conditioners of the present invention are cationic polysaccharides of cationic guar gum having a molecular weight of 1,000 to 3,000,000, preferably 2,500 to 350,000. Such polymers comprise a polysaccharide backbone consisting of galactomannan units, the degree of cationic substitution being from about 0.04 to about 0.80 per anhydroglucose unit, and the cationic group being a substituent of 2, 3-epoxy propyltrimethyl ammonium chloride to the natural polysaccharide backbone. It is an adjunct. Examples thereof are JAGUAR C-14-S, C-15 and C-17 (Celanese Corporation). In order to achieve the advantages described in the present invention, the structural or physical properties of the polymer must be suitable and fully hydrated, and then able to be well incorporated into the soap matrix.

It is noteworthy that the cationic guar gums JAGUAR C-14S and C-15 were intentionally designed to be slowly hydrated by the supplier. These slow hydration properties appear to be necessary for the typical use of such guar materials in shampoos and conditioners, where early hydration and the resulting increase in viscosity are disadvantageous to the formulation process.

Cationic guar gum polymers useful in the present invention are the hydroxyethyl celluloses (e.g., JR400 available from Union Carbide Corporation) as described in US Pat. Nos. 3, 761, 418 to Faren II and 2094307A. It has been found to be an effective skin conditioner than cationic polymers based on). Solutions of cationic polymers JAGUAR C-14-S and JR-400 containing anionic surfactants (sodium laurate soap) are evaluated. The skin condition is measured by visually evaluating dryness and erythema, and by examining the skin condition using a device (moisture loss through the skin, skin hydration and deterioration of sound waves). The results showed that cationic guar gum was about twice as effective as JR-400. Thus, cationic guar gums are more effective skin conditioners than cationic polymers based on hydroxyethyl cellulose, which is the most preferred kind of cationic polymer for use in the present invention.

Any conventional additives may be used in the compositions of the present invention, for example fragrances and electrolytes may be used to formulate skin cleansing products generally at levels of about 0.1 to about 2.5% of the composition. It is also possible to use colorants and fillers such as talc and clay. To prevent the growth of microorganisms, preservatives such as EDTA may be incorporated into the cleaning product, generally at levels below 1% of the composition. In addition, the antimicrobial agent may be incorporated at a level of usually 1.5% or less.

[Hydration of Polymers]

The hydrated cationic polymer according to the invention is a polymer which has already absorbed more than a sufficient amount of water so that it can be distributed substantially uniformly in the soap bar. Since excess water must be removed during processing of the soap, the desired amount of water used for hydration should not exceed the amount necessary to uniformly disperse the polymer in the soap.

In the present invention, the hydrated polymer is distributed substantially uniformly in the soap bar and then incorporated well. The hydrated polymer in the soap bar can be confirmed by any of the following evaluation methods.

[One. Microscopic evaluation]

The hydrated polymer in the soap bar is characterized by optical microscopic observation in the presence of a cationic substantially sulfane blue dye and then photographed with a color film. That is, uniform coloring of the blue / green color appears in the picture due to the polymer / dye composite. Blue / green coloration due to the polymer / dye complex is observed to be uniform in soap bar samples containing hydrated polymers. The colored area is preferably at least 90% of the sample. Within the polymer-containing region, the intensity of the color can be different at each point. In addition, there are almost no unhydrated polymer particles in the photographed area of the microscope. The number of particles present in an area of 264 cm 2 at a magnification of 77 × is less than 100, preferably less than 40, more preferably less than 10. The size of the observable particles present in the soap bars of the present invention is about 30 microns.

[Procedures for Microscopic Evaluation]

Uniformity of polymer distribution is examined by microscopic evaluation of the treatment with cationic substantially blue dye. The procedure is as follows:

1) The bar is cut into thin pieces (about 2 cm × 1.5; thickness 2-3 mm).

2) Place the fragment on the slide of the microscope.

3) A small amount of about 0.1% alcoholic sulfan blue dye solution is applied to the surface of the fragment for about 30 seconds.

4) The excess dye is washed with isopropanol and then the surface of the bar is gently dried using compressed air.

5) Observe the colored fragments generally at a magnification of 50 to 500 × using an optical microscope to illuminate over the fragments, illuminate the sides or illuminate from the bottom.

6) The image is recorded in color on the photographic film, and then developed and observed.

7) The polymer appears blue or green in the picture. The uniformity of the polymer distribution is checked and then the presence of unhydrated polymer particles is measured.

[2. Visible tactile evaluation]

Hydration of the polymer can be determined during the soap manufacturing process by adding the polymer, mixing the mixture for at least 15 minutes (and before the drying step) and examining the soap mixture. It is desirable for such inspection not to see the polymer mass visually. In addition, the resulting touch should not be sandy or granular when evaluated in water.

Cationic guar gum polymers require a relatively large amount of water for hydration. The amount of water is proportional to the molecular weight, so high molecular weight polymers seem to require more water. The preferred ratio of water / polymer in JAGUAR C-15 is about 9: 1 (parts). In JAGUAR C-14-S its ratio is about 19 parts water per 1 part polymer. The amount of water needed to hydrate the polymer is measured experimentally, which appears to be a function of the polymer molecular weight. The molecular weight of C-14-S is about 200, 000 to 300, 000, and the molecular weight of C-15 is smaller than this and therefore requires less water.

[Hydration of Polymers]

The cationic polymer may be hydrated in water prior to introduction into the soap making process or, if sufficient amount of water is present in the process to hydrate the polymer, it may be introduced into the soap making process. The method of introducing the polymer into the soap manufacturing process is as follows:

(1) The pre-hydrated cationic polymer is incorporated into a crusher mix (generally containing 25-40% water) which may include other soap bar components.

(2) Prior to entering the soap stream into the dryer, the pre-hydrated cationic polymer is mixed by direct injection into the blend of liquid soap streams.

(3) the anhydrous state of the well-granulated cationic polymer directly into a crusher mixture of soap containing a sufficient amount of water to hydrate the polymer, where the crusher mixture may comprise other soap bar components. Add.

(4) Before mixing with soap in the crusher, the polymer is previously hydrated using an aqueous solution of synthetic surfactant.

(5) Before entering the soap stream into the dryer, an aqueous slurry of polymer (ie, contains insufficient water to fully hydrate the polymer) is prepared and then a liquid soap blend stream (which is sufficient to hydrate the polymer). Mix directly by injecting directly).

A non-limiting example of a method for hydrating a cationic polymer is described in Example 1.

Example 1

1. Rapidly add 100 g of JAGUAR C-15 (powder) to 900 g of cold water (about 40-50 ° F., 4-10 ° C.) and shake it using a turbine blade mixer.

2. Mix for 10 to 15 minutes until the viscosity of the mixture becomes very high.

3. The mixture is stored at 140 ° F. (60 ° C.) for 12-24 hours to further promote hydration (in this step, a storage temperature of approximately ambient temperature to 140 ° F or more may be used). The polymer hydrated in step (3) is a hard gel.

[Method for Producing Soft Cleaning Composition Based on Soap]

In general, conventional processes are used for the preparation of cosmetic soap bars. The hydrated polymer is introduced into an aqueous soap mixture before vacuum drying. Generally the moisture content of the soap mixture before the drying step is 25 to 40%. In the drying step the water content is reduced to about 7-25%, preferably 7-15%. The polymer is incorporated according to the following examples.

Example 2

[Cutching step]

About 127.6 parts of a mixture containing 29.8% water, 52.7% 50/50 tallow / coconut (T / CN) soap, 16.7% CN AGS paste, 3.3% coconut free fatty acid (CNFA), 3.1% glycerin and 0.2% NaCl Heat to 150-200 ° F. (65-94 ° C.). About 10.0 parts of the hydrated polymer JAGUAR C-15 prepared according to the process of Example 1 are mixed therein.

[Vacuum drying step]

The crusher mixture is vacuum dried under an absolute pressure of about 50 mm Hg to reduce the water content of the mixture to about 10% and to pour this soap into a noodle. This noodle is passed through the grinding stage once.

[Mix step]

The crushed soap noodle is weighed once and then placed in a batch mixer. About 99.1 parts of the noodle in the mixer are added 0.20 parts of TiO ₂ , 1.4 parts of perfume, 0.15 parts of colorant solution and 0.15 parts of solution containing about 40% EDTA. Mix the combined ingredients thoroughly.

[Grinding stage]

The 3-roll soap grinder is operated using both rolls at 85-105 ° F. (29-41 ° C.). Pass through the mill of the mixture from the mixer several times to obtain a homogeneous mixture. This is a tight mixing step.

[Floating and Stamping Steps]

A conventional plotter is operated at a barrel temperature of about 90 ° F (32 ° C.) and a nose temperature of about 110 ° F (43 ° C.). The floater used is a two stage biaxial floater which allows a vacuum of about 40 to 65 mmHg between two stages. Soap logs protruding from the plotter are typically circular or rectangular in cross section, which is cut with each plug. This plug is stamped on a conventional soap stamping apparatus to obtain a processed cosmetic soap bar.

The processed bar formulations of Examples 2 to 6 are described below.

[Examples 2 to 6]

The preparation method of Example 2 was described in detail above. Examples 3 to 6 are prepared similarly to Example 2 using the components listed in the table above. In Examples 4 and 5, in addition to cationic guar gum JAGUAR C-15, other cationic polymers JR-400 and Merquat 550 were added, respectively. As long as a uniform distribution is obtained, a prehydrated polymer (eg Merquat 550) that is not too high in viscosity can be added to the crusher or mixer.

When prepared according to the process of Example 2, tested under the magnification according to the drying test described above, it was found to have a uniform polymeric distribution with almost no discrete particles of unhydrated cationic guar gum or other cationic polymer. Turned out.

Other bars are prepared according to the process described in Example 2, with the addition of unhydrated C-14-S cationic guar gum in the mixing step. They are observed to be heterogeneous and contain many large polymer masses (120 microns).

[Clinical Examination of Cosmetic Bars]

The clinical trial process using several cosmetic bar formulations to assess skin softness is as follows.

[Arm Wash Test Process of Clinical Softness]

[40 washes for 2 weeks, 4 times a day]

Participants perform the wash. Each participant is assigned two wash test products. Store these bars under the control of a technician (in a plastic dish). The test procedure for each arm is as follows:

1) Pick a Muslin towel and soak it in water.

2) Pick up the bar and soak it in water.

3) Rub the bar in the towel for 6 seconds.

4) Place the bar aside, rub the inside of the forearm with the towel from the wrist toward the elbow, then rub again in the opposite direction. Rub up and down for 10 seconds.

5) Allow the foam to remain on the forearm for 90 seconds.

6) Rinse thoroughly for 15 seconds using warm water.

7) pat dry with paper towels.

8) Wait 5 minutes.

9) Repeat steps 1) to 7).

10) After 3 to 4 hours, repeat steps 1) to 9).

[Test Product Blend]

The combination of clinically tested products is as listed in Table 1. Composition X is a control product based on soaps containing no polymer. Composition Y is a control product based on synthetic surfactants. Composition B is the product corresponding to Example 2 above. Composition "A" is prepared according to the process described in Example 2, like composition "B", but using a different cationic guar gum polymer and requires 19 parts of water per part of the polymer. Composition "X" is a control soap big containing no polymer, and composition "Y" is a composition of DOVE ^R which is a prior art level indicator for the softness of cosmetic bars.

TABLE 1

Test product blend

Scale of clinical trial skin

The grading scale of the forearm skin recorded in this example is as follows.

Forearm Rating Scale

Dryness of the skin

0. Perfect skin

1.0 Smudged and / or slight powdery patches and intermittent small patches may appear.

Generalized distribution.

2.0 Some generalized powder form. Initial cracking or intermittent small lifting may be present.

3.0 Generalized suitable powder form and / or suitable cracking and lifting scale.

4.0 Generalized severe powder forms and / or severe cracking and lifting scales.

5.0 generalized high cracking and lifting scale. Eczema changes may be present. Powder forms may be present but not many. Hemorrhagic cracking may appear.

6.0 Generalized severe cracks. Eczema changes may be present. Extruded cracks may be present. Although large, it may be the beginning of extinction.

Forearm rating scale

As used herein, the term "generalized" means that at least 50% of the forearm surface area is characterized. The overall skin grade reflects the generalized condition. 1/2 unit is used to indicate an intermediate state.

Results of Clinical Trials

The results of the clinical softness test are expressed in the skin grade of dryness, erythema and smoothness, which are shown in Table 2 below. Example X is a control product containing no polymer. Example Y is a control product based on DOVE ^R , a commercially available soft synthetic bar.

TABLE 2

* Significant difference at 95% confidence level

Difference: "+" (the second treatment is better)

"-" (Second treatment is better)

Significant differences in confidence levels between 89 and 94%

For smoothness, erythema and dryness, lower values indicate better skin conditions (see rating scale above). In particular, in Examples B and X of Table 2, Example B of the present invention has a dry grade of 3.31, which is lower than 3.65, which is the dry grade of Example X (see Table 1 for Formulations). . The difference is calculated by subtracting the dry grade of X from the dry grade of B, which is -0.33. Thus, a negative value indicates that the first treatment is better.

TABLE 3

Skin Grade Dryness of Single Product

The data in Table 2 shows in Example X that the skin cleansing compositions of the present invention (Examples A and B) are control soaps containing no polymer at all in dryness, erythema and smoothness, as described in the lower grades above. Compared to this, the softness is significantly improved. It should be noted that relatively low levels (1%) of polymers exhibit this result. In addition, the single product analysis of Table 3 shows that Example A of the present invention is superior to Example Y based on a soft surfactant. The product of Example B is similar to a soft synthetic bar.

Claims (36)

(1) 50-90% of soap; (2) An effective amount of hydrated cationic polymeric skin containing from about 0.2 to about 5% of a hydrated cationic guar gum having a molecular weight of 1,000 to 3,000,000, uniformly distributed and incorporated in a soap bar, and having a molecular weight of about 200,000 or more. A soft soap bar composition comprising a conditioner and (3) a soap bar containing about 7-15% moisture, wherein the soap bar contains virtually no more than 30 microns of unhydrated polymeric particles. (1) 50-90% of soap; (2) a molecular weight of 1,000 to 3,000,000, uniformly distributed and incorporated into the soap bar, containing 1 to 2% of an aqueous solution having a viscosity at 25 ° C. of about 125 to about 3500 ± 500 cps and a pH of about 9 to 11; An hydrated cationic polymeric skin conditioner comprising an effective amount of hydrated cationic guar gum containing from about 0.2 to about 5% and (3) an unhydrated polymeric composition containing from about 7 to 25% moisture and having a soap bar greater than 30μ. Soft soap bar composition, characterized in that it contains virtually no particles. The composition of claim 1, wherein the soap and the mixture of soap with the synthetic surfactant, wherein the soap is present at a level of at least 50% of the weight of the composition, and the synthetic surfactant may be present at a level of no greater than 20% of the weight of the composition. A soft soap bar composition comprising about 50 to about 80% of a surfactant and about 2 to 20% of a moisturizer selected from the group consisting of: The method of claim 1, wherein (A) about 0.6% to about 5% of a hydrated cationic polymer; (B) soap and a mixture of soap and synthetic surfactant, wherein the soap is present at a level of at least 50% of the weight of the composition, and the synthetic surfactant may be present at a level of no greater than 20% of the weight of the composition. A soft soap bar composition comprising about 50 to about 80% of the surfactant selected and about 2 to 20% of (C) humectant. The soft soap bar composition of claim 1 wherein the soap comprises a fatty acid soap having a fatty acid carbon chain length of C ₈ to C ₂₂ . The soft soap bar composition of claim 1 wherein the polymer is selected from the group consisting of cationic guar gum and cationic guar gum derivatives having a molecular weight of 200,000 to 350,000. 7. The soft soap bar composition of claim 6, wherein the bar contains at least 25% tallow soap. 7. The soft soap bar composition of claim 6 wherein the soap is a 0.1: 1 to 9: 1 mixture of tallow soap and coconut soap. 9. The soft soap bar composition of claim 8, wherein the ratio of tallow soap and coconut soap is from 1: 1 to 1.5: 1. 7. An alkyl glyceryl ether sulfonate, anionic acyl sacosinate, methyl acyl taurate, N-acyl glutamate, alkyl glucoside, acyl isethionate, alkyl sulfosuccinate, alkyl phosphate ester, ethoxylation Alkyl phosphate esters, methyl glocose esters, protein condensates, mixtures of ethoxylated alkyl sulfates and alkyl amine oxides, betaines, steines, alkyl ether sulfates containing 1 to 12 ethoxy groups and mixtures thereof A soft soap bar composition containing from about 2 to about 20% of a synthetic surfactant selected from and containing C ₈ -C ₂₂ alkyl chains. The soft soap bar composition of claim 10 wherein the synthetic surfactant contains C ₁₀ to C ₁₈ alkyl chains. 2. The soft soap bar composition of claim 1 containing less than 20% C ₁₀ to C ₁₈ alkyl glyceryl ether sulfonates. The soft soap bar composition of claim 1 containing from about 2 to about 17% of a humectant. (1) hydrating an effective amount of cationic polymer with water, (2) uniformly distributing and incorporating the hydrated cationic polymer into the aqueous soap mixture such that the polymer is substantially uniformly distributed and incorporated into the aqueous soap mixture, and ( 3) A process for preparing the soft soap bar composition according to claim 20 or 21, comprising the step of drying the uniform mixture to a water content of 7 to 25%. 15. The method of claim 14, wherein the cationic polymer is hydrated in a soap preparation crutcher step. The method of claim 14, wherein the polymer is hydrated with water and then mixed with an aqueous soap mixture. The method of claim 14, wherein the hydrated polymer is a copper flowable liquid, which is injected into a liquid soap stream and then dried. 15. The method of claim 14, wherein the hydrated polymer is a cationic guar gum gel mixed with a soap crusher step mixture containing 25 to 40% water. The method of claim 14, wherein the bar is dried to a water content of 7-15%. (1) about 50 to 90% of a mixture of soap and synthetic surfactant, the main surfactant of the bar; (2) An effective amount of hydrated cationic polymeric skin conditioner having a molecular weight of 1,000 to 3,000,000, uniformly distributed and incorporated in a soap bar, and containing from about 0.2 to about 5% of a hydrated cationic guar gum having a molecular weight of 200,000 or more. And (3) 7 to 15% moisture, and the soap bar is substantially free of non-hydrated polymeric particles of greater than 30 microns. The cationic copolymer of claim 1 wherein the hydrated cationic polymeric skin conditioner comprises a monomer selected from the group consisting of (i) other cationic polysaccharides, (ii) sugars, synthetic cationic monomers, and mixtures thereof. (iii) cationic polyalkylene imines, (B) cationic ethoxypolyalkylene imines and (C) cationic poly (N- (3- (dimethylammonio) propyl) -N'-3 Another cationic polymeric skin conditioner that is greater than 0% and no more than 5% selected from the group consisting of-(ethyleneoxyethylene dimethylammonio) propyl) urea dichloride) and (iv) a mixture thereof Soft soap bar composition further comprising. The hydrated cationic polymeric skin conditioner of claim 2, wherein the hydrated cationic polymeric skin conditioner comprises (i) other cationic polysaccharides, (ii) a cationic copolymer of sugars and synthetic cationic monomers, (iii) (A) cationic polyalkylene imines , (B) cationic ethoxypolyalkylene imine and (C) cationic poly (N- (3- (dimethylammonio) propyl) -N'-3- (ethyleneoxyethylene dimethylammonio) propyl) urea di Soft cat bar composition further comprising a synthetic polymer selected from the group consisting of chloride) and (iv) another cationic polymeric skin conditioner that is greater than 0% and up to 5% selected from the group consisting of mixtures thereof. The cationic copolymer of claim 20, wherein the hydrated cationic polymeric skin conditioner comprises a monomer selected from the group consisting of (i) other cationic polysaccharides, (ii) sugars, synthetic monomers, and mixtures thereof, iii) (A) cationic polyalkylene imines, (B) cationic ethoxypolyalkylene imines and (C) cationic poly (N- (3- (dimethyl ammonio) propyl) -N'-3- ( Ethyleneoxyethylene dimethylammonio) propyl) urea dichloride) and another cationic polymeric skin conditioner that is greater than 0% and no more than 5% selected from the group consisting of (iv) mixtures thereof Soft soap bar composition comprising. The composition of claim 2, wherein the soap and the mixture of soap with the synthetic surfactant, wherein the soap is present at a level of at least 50% of the weight of the composition and the synthetic surfactant may be present at a level of no greater than 20% of the weight of the composition. A soft soap bar composition comprising about 50 to about 80% of a surfactant and about 2 to about 20% of a moisturizer selected from the group consisting of: The soft soap bar composition of claim 2 wherein the soap comprises a fatty acid soap having a fatty acid carbon chain length of C ₈ to C ₂₂ . 3. The soft soap bar composition of claim 2, wherein the ratio contains at least 25% tallow soap. The soft soap bar composition of claim 2 wherein the soap is a 0.1: 1 to 9: 1 mixture of tallow soap and coconut soap. 28. The soft soap bar composition of claim 27 wherein the soap is from 1: 1 to 1.5: 1 of tallow soap and coconut soap. 3. An alkyl glyceryl ether sulfonate, anionic acyl sacosinate, methyl acyl taurate, N-acyl glutamate, alkyl glucoside, acyl isethionate, alkyl sulfosuccinate, alkyl phosphate ester, ethoxylation Alkyl phosphate esters, methyl glocose esters, protein condensates, mixtures of ethoxylated alkyl sulfates and alkyl amine oxides, betaines, steines, alkyl ether sulfates containing 1 to 12 ethoxy groups and mixtures thereof A soft soap bar composition containing from about 2 to about 20% of a synthetic surfactant selected from and containing C ₈ -C ₂₂ alkyl chains. 30. The soft soap bar composition of claim 29, wherein the synthetic surfactant contains C ₁₀ to C ₁₈ alkyl chains. The soft soap bar composition of claim 2 containing up to 20% C ₁₀ to C ₁₈ alkyl glyceryl ether sulfonates. The soft soap bar composition of claim 2 containing from about 2 to about 17% of a moisturizing agent. The soft soap bar composition of claim 21, wherein the other cationic polysaccharide is a cationic hydroxyethyl cellulose polymer. 23. The soft soap bar composition of claim 22, wherein the other cationic polysaccharide is a cationic hydroxyethyl cellulose polymer. 22. The soft soap bar composition of claim 21, wherein another cationic polymeric skin conditioner is a copolymer of dimethyldialkylammonium chloride and acrylamide. The composition of claim 23, wherein guar gum is present at a level of about 0.6 to about 2% and another cationic polymer is present at skin conditioning level.