EP0575440B1 - LOW pH MILD PERSONAL CLEANSING BAR - Google Patents

LOW pH MILD PERSONAL CLEANSING BAR Download PDF

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Publication number
EP0575440B1
EP0575440B1 EP92906869A EP92906869A EP0575440B1 EP 0575440 B1 EP0575440 B1 EP 0575440B1 EP 92906869 A EP92906869 A EP 92906869A EP 92906869 A EP92906869 A EP 92906869A EP 0575440 B1 EP0575440 B1 EP 0575440B1
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EP
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Prior art keywords
bar
mild
soap
personal cleansing
level
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EP92906869A
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German (de)
English (en)
French (fr)
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EP0575440A1 (en
Inventor
Bruce Lawrence Redd
Eddie Charles Walker
Robert Edgar Hare
Donald Aaron Niederbaumer
James Charles Dunbar
Theresa Anne Bakken
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Procter and Gamble Co
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Procter and Gamble Co
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D9/00—Compositions of detergents based essentially on soap
    • C11D9/002—Non alkali-metal soaps
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/006—Detergents in the form of bars or tablets containing mainly surfactants, but no builders, e.g. syndet bar

Definitions

  • This invention relates to mild personal cleansing bars and to processes of making them.
  • the surfactant system includes dodecylbenzene sulfonate in Examples 26-30, which is a relatively harsh surfactant.
  • STPP is used at levels of 10-15% in Mayhew et al.'s examples.
  • US-A-2,987,484, Lundberg and Blinka discloses a closed die injection molded detergent bar comprising alkyl glyceryl ether sulfonate and acyl isethionate.
  • alkyl glyceryl ether sulfonate Some other uses and procedures for making alkyl glyceryl ether sulfonate are disclosed in US-A-2, 094, 489, , Hulter, issued Sept. 28, 1937; US-A-2, 427, 576, Smith, issued Sept. 16, 1947; US-A-2,427,577, Smith, issued Sept. 16, 1947; US-A-2,989,547, Whyte, issued June 20, 1961; US-A-2,999,068, Pilcher et al., issued Sept. 5, 1961; and US-A-3,024,273, Whyte et al., issued Mar. 6, 1962.
  • surfactant mildness can be measured by a skin barrier destruction test which is used to assess the irritancy potential of surfactants. In this test the milder the surfactant, the less the skin barrier is destroyed. Skin barrier destruction is measured by the relative amount of radio-labeled water (3H-H2O) which passes from the test solution through the skin epidermis into the physiological buffer contained in the diffusate chamber. This test is described by T. J. Franz in the J. Invest. Dermatol. , 1975, 64, pp. 190-195; in US-A-4,673,525, Small et al., issued June 16, 1987.
  • 3H-H2O radio-labeled water
  • C18 alkyl glyceryl ether sulfonate at 5% is used in an example.
  • the added alkyl glyceryl ether sulfonate and salt are used to improve bar wear rate without adversely affecting its lathering characteristics.
  • An object of the present invention is to provide a stamped, mild personal cleansing bar which has improved processability.
  • Another object of the present invention is to provide a mild bar with excellent smear.
  • Yet another object is to formulate a mild personal cleansing bar with a relatively low level of free fatty acids to improve bar smear and bar firmness.
  • This invention is a mild personal cleansing bar comprising: from 20% to 50% lathering mild synthetic surfactant, from 5% to 50% of magnesium soap and from 1% to 9% free fatty acid, the magnesium soap and free fatty acid having an Iodine value of from zero to 50 and a titre of from 15 to 80; wherein the ratio of said lathering mild synthetic surfactant to said soap is from 10:1 to 0.4:1; said bar having a pH of from 6.5 to 8.5 in a 1% aqueous solution at 25°C, and wherein are excluded cleaning bars comprising water-soluble soap.
  • the invention relates to a mild personal cleansing bar made from a mix of from 20% to 50% of a lathering mild synthetic detergent surfactant and from 5% to 50%, preferably from 10% to 45%, magnesium soap.
  • the mild personal cleansing bar has a pH of from 6.5 to 8.5.
  • the pH of the bar is preferably from 7 to 8, and is preferably adjusted with a carboxylic acid.
  • the pH is measured as a 1% aqueous solution at 25°C.
  • the ratio of lathering mild synthetic surfactant to the magnesium soap is from 10:1 to 0.4:1, preferably from 5:1 to 0.5:1, more preferably from 4:1 to 0.6:1.
  • lathering mild synthetic surfactant means any surfactant which lathers at least about as well as the "mild standard alkyl glyceryl ether sulfonate (AGS),” as defined herein, which contains a substantial amount of C12 and C14 alkyl chains, specifically 68% C12; 25% C14; and 7% C16 AGS.
  • a “non-lathering, non-soil,load,diluent, surfactant” is defined as a surfactant which has a "low” lather on the order of a C16-C18 alkyl glyceryl ether sulfonate, and other C16-C18 synthetic surfactants, e.g., C16-C18 alkyl sulfates, etc.
  • These surfactants do not contribute to the lather in any appreciable way, but they also do not detract from the lather in any significant way. They are, however, especially effective in improving the ability of the bar to have a good grade in the Flex Test as described more fully hereinafter. They also are useful in improving the smear characteristics of the bars.
  • soil load diluent and "hydrophobic material” as used herein are synonymous and mean any diluent which is a soil load on the order of free fatty acid, paraffin wax, fatty alcohol, or triglyceride. Some of these materials, like paraffin wax, are very effective in improving the Flex Test grades. Other materials, like free fatty acid, help plasticize the formula for processability.
  • the magnesium (Mg) soap is made by using selected fatty matter (free fatty acids and soaps) having an Iodine Value of from zero to 50, preferably below 15, and more preferably from about zero to 3.
  • the fatty matter of the soap and free fatty acid have a titer of from 15 to 80, preferably 40 to 75, and more preferably from 50 to 70.
  • the free fatty acid (and other soil load diluents) in the mild personal cleansing bar of the present invention can be surprisingly low.
  • the Mg soap to FFA ratio can be from 50:1 to 0.5:1, preferably from 30:1 to 1:1, and more preferably from 15:1 to 2:1.
  • the level of FFA is from 1% to 9%, preferably from 2% to 9%, more preferably from 3% to 8%, of the bar.
  • the preferred hydrophobic material is a wax having a melting point (M.P.) of from 120°F to 185°F (49°-85°C), preferably from 125°F to 175°F (52°-79°C).
  • a preferred paraffin wax is a fully refined petroleum wax having a melting point ranging from 130°F to 140°F (49°-60°C). This wax is odorless and tasteless and meets US Food and Drug Administration (FDA) requirements for use as coatings for food and food packages.
  • FDA US Food and Drug Administration
  • paraffins are readily available commercially.
  • a very suitable paraffin can be obtained, for example, from The Standard Oil Company of Ohio under the trade name Factowax R-133 (RTM).
  • the paraffin preferably is present in the bar in an amount ranging from 5% to 20% by weight.
  • the paraffin ingredient is used in the product to impart skin mildness, plasticity, firmness, and processability. It also provides a glossy look and smooth feel to the bar.
  • the paraffin ingredient is optionally supplemented by a microcrystalline wax.
  • a suitable microcrystalline wax has a melting point ranging, for example, from 140°F (60°C) to 185°F (85°C), preferably from 145°F (62°C) to 175°F (79°C).
  • the wax preferably should meet the US Food and Drug Administration (FDA) requirements for food grade microcrystalline waxes.
  • FDA US Food and Drug Administration
  • a very suitable microcrystalline wax is obtained from Witco Chemical Company under the trade name Multiwax X-145A (RTM).
  • the microcrystalline wax preferably is present in the bar in an amount ranging from 0.5% to 5% by weight.
  • the microcrystalline wax ingredient imparts pliability to the bar at room temperatures.
  • the non-soil-load, surfactant diluent can be used at a level of from 0% to 40%, preferably from 5% to about 40%, and more preferably from 10% to 35% by weight.
  • the latter level range is highly preferred for Flex Test mildness.
  • the water level is from 2% to 15%, preferably from 4% to 10%.
  • the total non-surfactant electrolyte (organic and inorganic) level is from 1% to 10%, preferably from 2% to 8%, more preferably from 2% to 5%, by weight of the bar.
  • surfactants include alkyl sulfates, anionic acyl sarcosinates, methyl acyl taurates, N-acyl glutamates, alkyl sulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, trideceth sulfates, protein condensates, mixtures of ethoxylated alkyl sulfates and alkyl amine oxides, betaines, sultaines, and mixtures thereof. Included in the surfactants are the alkyl ether sulfates with 1 to 12 ethoxy groups, especially ammonium and sodium lauryl ether sulfates.
  • Alkyl chains for these surfactants are C8-C22, preferably C12-C14 for lathering mild surfactants, and C16-C18 for non-lathering non-soil-load diluents.
  • alkyl glyceryl ether sulfonate as used herein means, in general, a mixture of alkyl glyceryl ether sulfonate (AGS) surfactants having alkyl chains of from 8-22 carbon atoms, preferably from 10-20 carbon atoms, and more preferably from 12-14 carbon atoms.
  • AGS alkyl glyceryl ether sulfonate
  • Alkyl glyceryl ether sulfonates are derived from corresponding ethers consisting of straight alkyl chains which are in turn derived from their corresponding synthetic or natural alcohols.
  • Alkyl glycosides and methyl glucose esters are preferred mild nonionics which may be mixed with at least one of said mild anionic or amphoteric surfactants in the compositions of this invention.
  • a preferred ingredient is acyl isethionate.
  • Acyl isethionates are aliphatic higher fatty acid esters of an alkali metal isethionic acid salt and can be defined by the following general formula: RCOOCH2CH2SO3M wherein R is an aliphatic radical or mixed aliphatic radical of a higher fatty acid or mixture thereof, having from 6 to 20 carbon atoms, preferably from 8 to 18 carbon atoms, e.g., cocoyl or an approximately equivalent distribution of chain lengths, the longer chains (16 and 18) being more preferred as non-lathering, non-soil-load diluents and medium chain (C12-C14) being more preferred as lathering synthetic surfactants; and wherein M is an alkali metal cation such as sodium, potassium, or ammonium, or an organic amine base such as triethanolamine, triisopropanolamine, diethanolamine and ethanolamine.
  • a preferred milled bar for Flex Test mildness comprises: (1) from 5% to 25%, preferably from 10% to 20%, of C16-C18 alkyl (chain) sulfates and (2) from 5% to 50%, preferably from 10% to 30% magnesium soap by weight of the soap bar.
  • Lathering mild synthetic surfactants are also required in this preferred bar.
  • the ratio of the alkyl sulfates to magnesium soap can be from 3:1 to 1:6, preferably from about 1:2 to 1:4.
  • This non-soil-load, non-lathering, synthetic surfactant diluent is a surprisingly and unexpectedly excellent or superior diluent for lathering ultra mild synthetic surfactants, e.g., alkyl glyceryl ether sulfonate and/or cocoyl isethionate in personal cleansing bar compositions.
  • the synthetic surfactant diluents provide a surprisingly acceptable improvement in bar processability, while not significantly impairing bar mildness or the desirable physical characteristics of the bars.
  • the C16-C18 alkyl sulfates are derived from corresponding saturated straight chain alcohols.
  • the C16-C18 alkyl sulfates, as defined herein, comprise said C16-C18 alkyl chains at a level of at least 90%, preferably 93%, and more preferably 97%. In general, the ratio of C16 to C18 can range from 4:1 to 1:4 by weight.
  • a commercially available C16-C18 alkyl sulfate is SIPON® EC-111 (RTM) (formerly SIPEX® EC-111), sodium cetearyl sulfate, which is approximately 60% C16 and 36% C18.
  • SIPON® EC-111 (RTM) is sold by Alcolac Company, Baltimore, MD 21226.
  • Henkel Corp. Ambler, PA 19002.
  • Henkel's sodium cetearyl sulfate LANETTE E (RTM)
  • RTM is an estimated 50-50% C16-C18 alkyl sulfate sold as an emulsifier.
  • the lathering synthetic surfactant comprises from 20% to 50% by weight of the bars of this invention.
  • a preferred bar comprises: 25% to 45% lathering mild synthetic surfactant; 15% to 20% of non-soil-load synthetic surfactant diluent, e.g., cetearyl sulfate; 10% to 50% magnesium soap; and 1% to 10%, preferably 2% to 9%, free fatty acid; 0% to 8%, preferably 0.2% to 2%, polymeric skin feel aid; and 2% to 15%, preferably 4% to 10%, water.
  • the bars of the present invention comprise a soil load diluent (FFA, wax, etc.) to lathering mild synthetic surfactant ratio of from 0.1:1 to 1:1, preferably from 0.2:1 to 0.9:1.
  • FFA soil load diluent
  • lathering mild synthetic surfactant ratio of from 0.1:1 to 1:1, preferably from 0.2:1 to 0.9:1.
  • the bars of the present invention comprise a soil load diluent to a non-soil-load diluent (including Mg soap) ratio of from 0.1:1 to 1:1, preferably from 0.2:1 to 0.9:1, and without Mg soap the ratio is 0.4:1 to 30:1.
  • the bars of the present invention comprise a lathering synthetic surfactant to a non-soil-load diluent (with Mg soap) ratio of from 0.2:1 to 3:1, preferably from 0.3:1 to 2:1, and without Mg soap the ratio is 0.5:1 to 35:1.
  • the bars of the present invention comprise a magnesium soap to lathering synthetic surfactant ratio of from 1:10 to 1:0.4, preferably from 1:5 to 1:0.5, more preferably from 1:4 to 1:0.6.
  • the bars of the present invention comprise a magnesium soap to total synthetic surfactant(s) (lathering + diluent) ratio of from 0.1:1 to 3:1, preferably from 0.2:1 to 2:1, and more preferably from 0.3:1 to 1.5:1.
  • the bars of the present invention comprise a magnesium soap to free fatty acid ratio of from 50:1 to 0.5:1, preferably from 30:1 to 1:1, more preferably from 15:1 to 2:1.
  • the bars of the present invention comprise a magnesium soap to a soil load diluent (FFA, wax, etc.) ratio of from 0.3:1 to 5:1, preferably from 0.4:1 to 4:1.
  • FFA soil load diluent
  • the water level of the bar should be from 2% to 7%, preferably from 2.5% to 6% by weight for improved smear.
  • More than one lathering synthetic surfactant can be used. E.g., from 2% to 25%, preferably from 3% to 20%, more preferably from 4% to 16% by weight, of very high lather enhancing surfactant, e.g., sodium lauroyl sarcosinate can be used with AGS, as shown in the Examples herein.
  • very high lather enhancing surfactant e.g., sodium lauroyl sarcosinate can be used with AGS, as shown in the Examples herein.
  • bar ingredients are selected from: non-lathering diluent surfactants, magnesium soap, soil load diluents, polymeric skin feel aids, moisturizers, fillers, etc.
  • the mild personal cleansing bars can also have about 0-8%, preferably 0.2-2% by weight, polymeric skin feel aid if present.
  • a preferred bar of this invention can comprise 0.1% to 5%, more preferably 0.2% to 2%, of a suitably fast hydrating cationic polymer.
  • the polymers have molecular weights of from 1000 to 3,000,000.
  • a preferred one is selected from cationic guar gums having a molecular weight range of 2,500-350,000.
  • the cationic polymer is selected from the group consisting of:
  • members of the cationic polysaccharide class include the cationic hydroxyethyl cellulose JR 400 (RTM) made by Union Carbide Corporation; the cationic starches Stalok® (RTM) 100, 200, 300 and 400 made by Staley, Inc.; the cationic galactomannans based on guar gum of the Galactasol 800 series by Henkel, Inc. and the Jaguar Series by Celanese Corporation.
  • Examples of members of the class of copolymers of saccharides and synthetic cationic monomers include those composed of cellulose derivatives (e.g., hydroxyethyl cellulose) and N,N-di-allyl,N-N-dialkyl ammonium chloride available from National Starch Corporation under the trade name Celquat (RTM).
  • cellulose derivatives e.g., hydroxyethyl cellulose
  • RTM N,N-di-allyl,N-N-dialkyl ammonium chloride available from National Starch Corporation under the trade name Celquat (RTM).
  • the cationic synthetic polymers useful in the present invention are cationic polyalkylene imines, ethoxypolyalklene imines, and poly[N-[-3-(dimethylammonio)propyl]-N'-[3-(ethylene-oxyethylene dimethylammonio)propyl]urea dichloride] the latter of which is available from Miranol Chemical Company, Inc. under the trademark of Miranol A-15 (RTM), CAS Reg. No. 68555-36-2.
  • Preferred cationic polymeric skin conditioning agents of the present invention are those cationic polysaccharides of the cationic guar gum class with molecular weights of 1,000 to 3,000,000. More preferred molecular weights are from 2,500 to 350,000. These polymers have a polysaccharide backbone comprised of galactomannan units and a degree of cationic substitution ranging from 0.04 per anhydroglucose unit to 0.80 per anhydroglucose unit with the substituent cationic group being the adduct of 2,3-epoxypropyltrimethyl ammonium chloride to the natural polysaccharide backbone. Examples are JAGUAR C-14-S (RTM), C-15 and C-17 sold by Celanese Corporation. In order to achieve the benefits described in this invention, the polymer must have characteristics, either structural or physical which allow it to be suitably and fully hydrated and subsequently well incorporated into the soap matrix.
  • perfumes can be used in formulating the skin cleansing products, generally at a level of from 0.1% to 1.5% by weight of the composition.
  • Alcohols, hydrotropes, colorants, and fillers such as talc and clay, can also be used.
  • Preservatives e.g., sodium ethylenediaminetetraacetate (EDTA), generally at a level of less than 1% of the composition, can be incorporated in the cleansing products to prevent microbiological growth.
  • Antibacterials can also be incorporated, usually at levels up to 1.5% by weight.
  • a preferred bar of the present invention can contain from 0.5% to 4%, preferably from 2% to 3.5% by weight, trisodium phosphate.
  • the magnesium soaps can be added as is, or made in situ, e.g., via adding a base, e.g., Mg(OX)2, to convert free fatty acids in the composition mix.
  • a base e.g., Mg(OX)2
  • the synthetic detergent neutralized with a solution of an alkali metal hydroxide or carbonate, to which the salting-out electrolyte has been added (if insufficient electrolyte will be formed in situ during the neutralization step and in other steps of the process), is introduced into a suitable mixer, such as a soap crutcher.
  • a suitable mixer such as a soap crutcher.
  • Some water can then be added to improve fluidity, and a sodium soap, preferably as soap containing 30% water, is added.
  • a sodium soap preferably as soap containing 30% water
  • these ingredients are mixed and then an appropriate amount of water-soluble alkaline earth metal salt, such as magnesium sulfate or chloride is added to convert the water-soluble soap to water-insoluble soap, sodium salting-out electrolyte being formed as by-product.
  • the magnesium soap is made before the synthetic surfactant is added to the mix. Mixing is then continued to insure the equilibrium in the formation of the magnesium soap is attained.
  • the crutcher mix is dried and cooled using a combination flash chamber and chill roll or chill belt.
  • the crutcher mix is first heated to approximately 132°C (270°F) by a heat exchanger and then flash dried in a chamber above the chill roll or chill belt. From the flash chamber the hot, dried mix is extruded onto the chill roll or chill belt.
  • the chill belt or chill roll provides a uniform, thin, cool (29-35°C, 85-95°F) product in flake or chip form. Typical moisture for the flake is 2-12%, preferably 6-8%.
  • the ways to regulate the moisture in the order of preference, are (1) increasing or decreasing steam pressure on the heat exchanger; (2) increasing or decreasing crutcher mix rate to the heat exchanger; and (3) increasing or decreasing crutcher mix temperature to the heat exchanger.
  • the flakes are weighed and mixed in a batch amalgamator to obtain uniform flake size. Preweighed perfume is added to the flakes and mixed in the amalgamator to obtain the desired finished product perfume level. The perfumed flakes are transferred to the mill hopper or directly to the plodder.
  • the 3-roll soap mills are set up with the first roll at 38°C (100°F) and the other two mills at about 21°C (70°F).
  • the soap is passed through the mills several times to provide a homogeneous mixture of perfume and dried flakes.
  • the plodder is set up with the barrel temperature at about 21°C (70°F) and the nose temperature at 38-49°C (100-120°F).
  • the ideal plodder is a dual stage plodder that allows use of a vacuum of about 50-83 kPa. (15-25 inches of Hg).
  • the plugs should be cut in 12.5 cm (5") sections and stamped with a cold die block using die liquor such as alcohol, if appropriate.
  • Example 7 is made by adding magnesium chloride to Na soap to form the Mg soap by ion exchange before mixing with the synthetic surfactants.
  • Comparative Example A is made similar to the bars of Examples 1-6, except that sodium hydroxide is used instead of Mg(OH)2 and is used as a standard for the mildness and smears.
  • Comparative Example B is the "B" bar and is used as a second standard for the mildness and smears.
  • Comparative Example C is a leading commercial all soap bar and is used as a standard for typical all soap bars.
  • Example 2 is the preferred overall bar for mildness, lather, and smears.
  • All series of testing should include control, and all samples should be run in duplicates. A maximum of 7 products (6 plus a control) can be tested at one time, and an interval of 10 minutes between every 4 samples should be allotted for the addition of water as to not allow any products a lag time for soaking longer than 2 hours.
  • the washings are performed by a technician. Each panelist is assigned a set of 8 products for washings, 4 per arm. The test procedure for each arm is:
  • Example 6 The total level of synthetic surfactants in Example 6 is 56% by weight, and the water level is 7.5% by weight; the ratio of Mg soap to total synthetic is 0.18:1.
  • the smears could be improved in Example 6 by lowering the water level to below 7% by weight.
  • Example 4 which has a total synthetic of 56.6% by weight and a Mg soap to total synthetic ratio of 0.22:1 but has a higher Mg soap level, 12.8% by weight vs. 10%, has a better smear, notwithstanding equal water levels for Examples 4 and 6.
  • the magnesium soap level is low, e.g., 10% by weight or less, and when the level of the total synthetic surfactant(s) to magnesium soap is more than 5:1, the water level of the bar should be from 2% to 7%, preferably from 2.5% to 6% by weight for improved smear.
  • Comparative Example A is an ultra mild bar having fairly good smear, about the same as the "B" bar, a mild, commercially available, soap/synthetic bar. Comparable mild bars of this invention, e.g., Examples 1-5 and 7 have improved smears over Example A, as well as the Standard Comparative Example B, which is the "B" bar. Comparative Example C is a leading pure soap bar to show the superior mildness of the bars of this invention over it.
  • Comparative bar Example C a leading all soap bar, has the highest erythema grade of 2.42.
  • Examples 3, 2, and 6 have erythema grades comparable to the "B" bar which show grades of from about 0.65 to about 1.29, the low and the high of four "B" bar grades.
  • the erythema grades for 3, 2, and 6 are, respectively, 1.18; 0.90; and 0.68.
  • the erythema grades for Example 8 and Comparative Example A are better than the all soap bar, Example C, and are close to the "B" bar.
  • Example 7 has less preferred fatty matter, specifically a lower titer (37) and a higher Iodine Value (38) than Examples 3, 2, and 6.
  • Example Titer Iodine Value 3 41-44 Maximum 1.0 2 54.5-55.5 Maximum 0.5 6 54.5-55.5 Maximum 0.5 7 37 38 Referring to Table 1, Example 7, however, has an excellent Smear 2 of 8. Forearm Clinical* Redness Dryness Ex. 7 1.18 1.68 Ex .A 1.19 1.66 Ex. A 1.16 1.70 Ex. B 1.70 S 2.22 S Ex. 1 1.37 1.44 Ex. B 1.69 S 1.63 S * Lower numbers the better. S Significance at 90-95% confidence.
  • Examples 7 and 1 are all better than “B” for both Redness and Dryness. Examples 7 and A are about equal, and A is significantly better than B. Example 1 is also significantly better than "B.”
  • Example 1 also has superior smears over “B” as shown in Tables 1 and 2; Average Smears 1 are 0.98 for Example 1 vs. 2.55 for “B,” which shows a significant advantage for Example 1. Smears 2 are 7.5 for Example 1 vs. 7.0 for “B,” which is a slight advantage for Example 1.
  • Example 1 has sensory characteristics, tightness, smoothness, and softness, comparable to the "B" bar.
  • the tightness result is surprising in view of the presence of 33% by weight magnesium soap in Example 1.

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EP92906869A 1991-03-13 1992-01-30 LOW pH MILD PERSONAL CLEANSING BAR Expired - Lifetime EP0575440B1 (en)

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US66857891A 1991-03-13 1991-03-13
US668578 1991-03-13
PCT/US1992/000689 WO1992016609A1 (en) 1991-03-13 1992-01-30 LOW pH MILD PERSONAL CLEANSING BAR

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US5387362A (en) * 1992-10-13 1995-02-07 The Procter & Gamble Company Personal cleansing bar with tailored base soaps with mixed counterions for improved mildness and processability without lather negatives
ATE245186T1 (de) * 1994-05-10 2003-08-15 Procter & Gamble Syndetseifenriegel zur körperpflege mit geringem gehalt an nichtionischen polyethylen- /polypropylenglycolpolymeren für verbesserte zartheit
US5496493A (en) * 1994-05-10 1996-03-05 The Procter & Gamble Company Ultra mild personal cleansing bar containing smaller-sized particulate wax
US5540852A (en) * 1995-01-31 1996-07-30 The Procter & Gamble Company Personal cleansing bar with tailored fatty acid soap
WO2015200781A1 (en) * 2014-06-26 2015-12-30 Barzgar Artin Reduction of oral and epidermal malodor in humans and animals
CN108048266A (zh) * 2018-02-08 2018-05-18 深圳天和圆实业有限公司 一种清洁用弱酸性香皂
CN108982759B (zh) * 2018-06-06 2021-03-09 上海家化联合股份有限公司 美容产品对人体皮肤滋润能力的测试方法
DE102021005857A1 (de) 2021-11-25 2023-03-23 J. Rettenmaier & Söhne Gmbh + Co Kg Körperpflegeprodukt und Verfahren zu dessen Herstellung

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US2781321A (en) * 1953-05-12 1957-02-12 Gen Aniline & Film Corp All purpose detergent bar
US3070547A (en) * 1953-07-13 1962-12-25 Procter & Gamble Soap-synthetic bar
BE546418A (zh) * 1955-03-31
BE607797A (zh) * 1960-09-05
US4673525A (en) * 1985-05-13 1987-06-16 The Procter & Gamble Company Ultra mild skin cleansing composition

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CN1042745C (zh) 1999-03-31
AU1419092A (en) 1992-10-21
MA22463A1 (fr) 1992-10-01
DE69210992D1 (de) 1996-06-27
GR3020019T3 (en) 1996-08-31
DK0575440T3 (da) 1996-10-07
IE920803A1 (en) 1992-09-23
MX9201096A (es) 1992-09-01
EP0575440A1 (en) 1993-12-29
HU9302584D0 (en) 1993-12-28
NO933256L (no) 1993-11-08
JPH06505764A (ja) 1994-06-30
WO1992016609A1 (en) 1992-10-01
SK98493A3 (en) 1994-02-02
CZ190493A3 (en) 1994-07-13
BR9205766A (pt) 1994-09-27
CN1064887A (zh) 1992-09-30
DE69210992T2 (de) 1996-11-28
NO933256D0 (no) 1993-09-13
ATE138411T1 (de) 1996-06-15
HUT65576A (en) 1994-07-28
FI934002A (fi) 1993-09-13
PT100243A (pt) 1994-05-31
EG20454A (en) 1999-04-29
FI934002A0 (fi) 1993-09-13
ES2087531T3 (es) 1996-07-16
CA2105090A1 (en) 1992-09-14
TW198063B (zh) 1993-01-11

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