HUT65576A - Low ph mild personal cleansing bar - Google Patents

Abstract

This invention is a mild personal cleansing bar comprising: from about 20 % to about 50 % lathering mild synthetic surfactant and from about 5 % to about 50 % of magnesium soap; wherein the ratio of said lathering mild synthetic surfactant to said soap is from about 10:1 to about 0.4:1; said bar having a pH of from about 6.5 to about 8.5 in a 1 % aqueous solution at 25 DEG C.

Description

The present invention relates to mild personal toiletries and processes for their preparation.

Personal cleansing with mild surfactant detergents has been the focus of interest. The production of such soap bars has also become the focus of interest. The lubricating properties of such soap bars have attracted even greater interest.

The problems associated with mild soap bars containing synthetic detergents are formability, strength, lubrication and tenderness. Problems in the formulation of such soap bars are not limited to the appearance properties of the finished soap bars. Most soap bars made from really mild detergent are very difficult to make.

In contrast, the production of relatively pure soap bars is a well-established industrial process that includes manufacturing, pressing and molding. Coconut / tallow soap becomes quite ductile when heated and can be easily pressed and molded at relatively low pressures.

Most synthetic detergent and detergent filler combinations do not become ductile and the machinery for their manufacture needs to be designed specifically (see U.S. Patent No. 2,678,921).

The ideal manufacturing process should be fast and hassle-free when kneading, pressing and forming the toilet soap. The production of most mild soap bars does not strike a blow in this regard.

The development of soap - synthetic soap bars in the II.

dating back to World War II. Hoyt, U.S. Patent 2,432,169, discloses a bar containing as an active ingredient soap and alkylbenzene sulfonate and as a binder a substantial amount of corn starch; Mills and Korpi, U.S. Pat. No. 2,988,511, disclose a non-lubricating soap bar comprising alkyl glyceryl ether sulfonate, sodium and potassium soaps and a binder. Blinka and Grounds, U.S. Patent No. 2,982,735, disclose a detergent kneaded soap bar comprising soap, anionic detergent and starch.

U.S. Patent No. 2,781,321 to Mayhew et al., Is a all-purpose detergent soap bar containing 50% magnesium stearate containing 20% resin and others (Example 19). The detergent system described in Examples 26-30 also includes dodecylbenzene sulfonate, which is a relatively coarse detergent. Examples from Mayhew et al. Use 10-15% sodium tripolyphosphate (STPP).

Chaffee, U.S. Patent No. 3,070,547, discloses a synthetic potassium soap-synthetic soap bar containing magnesium soap. The bars described by Chaffee do not appear to contain free fatty acids, nor did they indicate the pHs of the detergent systems mentioned in the examples, but they are generally relatively high.

Lundberg and Blinka, U.S. Patent No. 2,987,484, disclose a detergent bar formed by injection into a closed form which is an alkyl glycerol ether. containing sulfonate and acyl isethionate. Alkyl glyceryl ether sulfonate has also been used by others, as disclosed in U.S. Patent Nos. 2,094,489, 2,427,576, 2,427,577, 2,989,547, 2,999,068, and 3,024,273, which are incorporated herein by reference.

It is noted that the detergent mildness can be measured by the skin barrier degradation test, which is used to determine the irritant capacity of the detergents. In this test, the milder a detergent, the less it breaks down the skin barrier. The degree of dermal carcinoma degradation is examined by exposing a piece of epidermis in a diffusion chamber to a test solution containing radioactively labeled water ( ⁸ H-H2O) and measuring the appearance of radioactivity in physiological buffer soaking the back of the epidermis. The method is described by Franz, TJ [J. Invest. Dermatol., 64, 190-195 (1975)], followed by Small et al.

Geitz, U.S. Patent No. 2,894,912 to Isethionate Detergent Bar, discloses a detergent bar having essentially 30 to 70% water-soluble alkali metal salts of esters of isethionic acid (2-hydroxyethanesulfonic acid) as a detergent and 6 to 18 carbon atoms. mixed aliphatic fatty acids with iodine number below 75%, containing at least 75% of mixed acids with 12 to 18 carbon atoms and up to 25% with 6 to 10 carbon atoms, in the range of 2 to 10% · At least one water soluble, antifoaming detergent salt selected from the alkali metal or organic amine salts of higher aliphatic fatty alcohol sulfates, alkylarylsulfonates and higher aliphatic fatty acid taurides , about 1-9% water, about

Contains 2.5-25% water-soluble higher fatty acid soap and 10-40% at least one higher fatty acid with about 12-25 carbon atoms, as a binder and softener having a pH of 6 to 8 in 10% aqueous measured in solution at 35 ° C. No magnesium soap was used.

Tokosh et al., U.S. Pat. No. 4,180,470 discloses an improved process for the manufacture of 30-70% acyl isethionate detergent bars, which are 2-6% sodium alkoxy hydroxypropanesulfonate (synonym for alkyl glyceryl ether sulfonate), alkyl chains have from 8 to 22 carbon atoms and contain small amounts of sodium chloride. In one example, 5% C 18 alkylglyceryl ether sulfonate is used. The addition of alkyl glyceryl ether sulfonate and salt improves the bar wear ratio without adversely affecting its foaming properties.

Morshauser, in U.S. Patent No. 4,234,464 to Detergent Bar Composition and Binder Therefor, discloses in Example 6 a detergent bar containing 45% sodium cocooyl isethionate, 5% alkylamide, 37%, 5% stearic acid, 5.0% hydrogenated tallow glycerides and 1% Polymer JR. Morhauser claims that detergent bars can contain up to 5% soap without significant deterioration.

Orshitzer et al., Unigue All Synthetic Detergent ♦ »» · ** »η η η η · ·.

U.S. Patent No. 4,012,341 to Shampoo Bar, U.S. Pat. No. 4,012,341 discloses a bar comprising a mixture of anionic and nonionic detergents. Their examples are primarily based on sodium lauryl sulfate, which is an unacceptably coarse primary detergent for the present invention.

U.S. Patent No. 3,761,418 to Parran, Jr., Detergent Compositions Containing Partiele Deposition Enhancing Agents, discloses detergent compositions, including a soap bar, wherein the main surfactant is an alkyl sulfate, which is unacceptable to the mild skin of the present invention.

The main drawbacks of most synthetic detergent toilet soap formulations are roughness, poor foaming, poor lubrication and poor processability due to tackiness. The use of highly foaming anionic detergents results in an acceptable foam volume. It is unfortunate that just the most foaming anionic detergents can be poorly processed. Some extremely mild coconut / tallow alkyl glyceryl ether sulfonate sodium salts (AGS) have relatively good foaming properties, but are not easy to process due to their sticky or hygroscopic nature. We have discovered that the requirements of workability, strength, lubrication, lightness, foaming, and rinsing make the selection of a detergent for a mild personal care detergent a very finely balanced task. It has also been recognized that the often stringent requirements for the preparation of mild personal toiletries limit the range of detergents and therefore the finished product represents a degree of compromise. Weakness is often only achieved at the expense of processing authority, effective cleaning ability or rinsability, or vice versa. Workability can often be improved at the expense of lubrication.

We can safely say that it is difficult to make a light personal cleanser that is highly processed, sufficiently mild, well-lubricated, has a good foaming ability and is well rinsed.

FIELD OF THE INVENTION The present invention relates to a pressurized, mild personal care product with improved processability.

The invention further relates to a highly lubricating, mild soap bar.

It is another object of the present invention to provide a mild personal cleanser having a relatively low fatty acid content and thus improved lubricity and strength.

Further objects of the invention will be apparent from the following detailed description.

FIELD OF THE INVENTION The present invention relates to a mild, personal cleanser comprising a mixture of about 20% to about 50% foaming mild synthetic detergent and about 5% to about 50%, preferably about 10% to about 45% magnesium soap. The pH of the mild personal cleanser is about 6.5 to 8.5. The pH of the soap bar is preferably about 7-8 and is preferably adjusted with a carboxylic acid. The pH was measured in a 1% aqueous solution at 25 ° C.

The ratio of foaming mild synthetic detergent to magnesium soap is about 10: 1 to about 0.4: 1, preferably about 5: 1 to about 0.5: 1, more preferably about 4: 1 to about 0.6: A value of 1.

Under the name of a mild synthetic detergent, the foaming agent is a det erg * ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦. <8 means any detergent that foams at least as standard mild alkyl glyceryl ether sulfonate (AGS), which contains substantial amounts of C12 and C14 alkyl chains, particularly about 68% C12, 25% C14 and 7% contains C16-CGS.

A non-foaming, non-wastewater-loading filler, detergent is defined as a low-foaming detergent for C16-C18 alkyl glyceryl ether sulfonates and other C16-C18 synthetic detergents, e.g. For C 18 alkyl sulfonates, etc. in comparison. These detergents do not appreciably participate in foaming, but do not significantly reduce foaming. However, they are particularly effective in improving the soap bar's ability to obtain a good rating in the Flex test, which will be described in more detail later. They can also be used to improve the lubrication characteristics of the soap bar.

The terms wastewater-loading filler and hydrophobic material are used interchangeably and are meant to include any filler which is a wastewater-loading material of the class of free fatty acids, paraffin waxes, fatty alcohols or triglycerides. Many of these materials, such as paraffin waxes, are very effective in improving the Flex test rating. Other substances, such as free fatty acids, aid in the processability of the formulation by plasticization.

Magnesium (Mg) soap can be prepared using selected fatty substances (free fatty acids and soaps) having iodine numbers from 0 to about 50, preferably 15 to 10. · 9· • l l * * l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l. The pour point (measured in ° C) may be low, reaching about 15 ° C, and the preferred soap fatty acid and free fatty acid having a freezing point of about 60 to 80 ° C, preferably about 35 to 75 ° C, more preferably about 50 to 70 ° C.

The chemical properties of some preferred saturated pure fatty acids are shown in Table 1.

Table 1. Saturated pure fatty acids

Acid carbon number acid value Molecule- crowd Pour Point C decanoic 10 326 172 lauric 12 280 200 44.2 myristic 14 246 228 54.4 pentadecanoic 15 231 242 palmitic 16 219 256 62.9 heptadecanoic 17 207 270 stearic 18 197 284 69.6 -nonadecanoic 19 188 298 eos cosanoic acid 20 180 312 docosanoic 22 165 340

Tables 2, 3 and 4 show some of the chemical properties of palm, coconut and tallow fatty acids, respectively.

Table 2. Palm Fatty Acids (Typical)

Acid

Number of carbon atoms

Weight%

Saturated

octanoic 8 3 decanoic 10 3 lauric 12 50 myristic 14 18 palmitic 16 8 stearic 18 2 unsaturated oil acid 18/1 14 linoleic 18/2 2 Iodine value: low: 14 tall: 23 saponification song: low: 245 tall: 255 Melting point ° C (fatty acid): low: 20

tall:

«·

Table 3. Coconut Fatty Acids (Typical)

Acid carbon number Crowd Saturated octanoic 8 7 decanoic 10 6 lauric 12 50 myristic 14 18 palmitic 16 8.5 stearic 18 3 unsaturated oil acid 18/1 6 linoleic 18/2 1 linolenic 18/3 0.5 Iodine value: low: 7.5 tall: 10.5 saponification song: low: 250 tall: 264 Melting point ° C (fatty acid): low: 20

tall:

• V

Table 4. The tallow fatty acids (typical)

Acid

Number of carbon atoms

Weight%

Saturated

myristic 14 3 pentadecanoic 15 0.5 palmitic 16 24 heptadecanoic 17 1.5 stearic 18 20 unsaturated tetradecenenoic 14/1 1 hexadecenoic 16/1 2.5 oil acid 18/1 43 linoleic 18/2 4 linolenic 18/3 0.5 Iodine value: low: 45 tall: 50 saponification song: low: 192 tall: 202 Melting point ° C (fatty acid): low: 40 tall: 45

The amount of free fatty acids (and other wastewater-loading fillers) in the mild personal care detergent according to the invention may be surprisingly low. The Mg soap / free fatty acid ratio can range from about 50: 1 to about 0.5: 1, with a ratio of about 50: 1 to about 0.5: 1. «* ·« · «» «» ·

- 13 - .............

preferably from about 30: 1 to about 1: 1, more preferably from about 15: 1 to about 2: 1. The proportion of free fatty acids in the soap bar is about 1 to 10%, preferably about 2 to 9%, more preferably 3 to 8%.

Hydrophobic materials (wastewater loading agents) may be present in the soap bars of the present invention in a proportion of from zero to about 40%, but are preferably used in a proportion of from about 5% to about 20%. Other hydrophobic materials, including free fatty acids, have from about 8 to about 18 carbon atoms; glycerides are mono-, di-, or triglycerides; fatty alcohols have from about 8 to about 18 carbon atoms; and mixtures of the foregoing; wherein said compositions comprise up to about 25% of said waxes and up to about 15% of said other hydrophobic materials. Triglycerides (with C8-C18 acyl groups) can be used up to 10% without adversely affecting acceptable foam formation.

The preferred hydrophobic material is a wax having a melting point of about 49-86 ° C, preferably about 52-79 ° C. The preferred paraffin wax is a fully refined petroleum wax having a melting point of about 49-60 ° C. This wax is odorless and tasteless and meets the Food and Drug Administration's requirements for food and food packaging coatings. Such paraffins are readily available. A very suitable paraffin is available, for example, from the Standard Oil Company (Ohio, USA) under the tradename Factowax R-133.

• · • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · were |

- 14 Other suitable waxes are marketed by National Wax Co. under the trade names 9182 and 6971, melting at about 55 ° C.

The proportion of paraffin in the soap bar is preferably from about 5% to about 20% by weight. The paraffinic ingredient is used in the product for skin softness, formability, hardness and processability. Paraffin also gives the soap bar a bright appearance and a soft touch.

The paraffin component may optionally be supplemented with microcrystalline wax. For example, the corresponding microcrystalline wax may have a melting point of from 60 to 85 ° C, preferably from 62 to 79 ° C. Preferably, the wax must meet the requirements of the Food and Drug Administration for microcrystalline waxes for food purposes. A perfectly suitable microcrystalline wax is available from Witco Chemical Company under the tradename Multiwax X-145A. The proportion of microcrystalline wax in the soap bar is preferably from about 0.5% to about 5% by weight. Microcrystalline wax gives the soap bar flexibility at room temperature.

The non-waste water detergent filler may be used in a ratio of 0-40%, preferably about 5-40%, and more preferably about 10-35%. The latter ratios are most advantageous in terms of lightness measured by the Flex test.

The ratio of water is about 2 to 15%, preferably about 4 to

%.

The proportion of total non-detergent electrolytes (organic and inorganic) is from about 1% to about 10%, preferably from about 2% to about 8%, more preferably from about 2% to about 5% by weight of the soap bar. 4 44 • 4 4 * 4 · ♦ «44 • 4« 4 4 4 * 4 · '·· «(« * · »* 4 · 4

- 15 compared.

A number of examples of detergents are found in the patents which are incorporated herein by reference. These include alkyl sulfates, anionic acyl sarcosinates, acyl methyl taurates, N-acyl glutamylates, alkyl sulfosuccinates, alkyl phosphoric acid esters, phosphoric acid ethoxylated alkyl esters, tridecetsulfates, and alkylamine oxides, betaines, sultans and mixtures thereof. Detergents include alkyl ether sulfates having from 1 to 12 ethoxy groups, especially ammonium and sodium lauryl ether parent salts.

The alkyl groups of the above-mentioned detergents contain from 8 to 22 carbon atoms, preferably from 12 to 14 carbon atoms for mild foaming detergents, and from 16 to 18 carbon atoms for non-foaming, non-waste water detergents.

The term alkyl glyceryl ether sulfonate is generally understood to mean a mixture of alkyl glyceryl ether sulfonate (AGS) detergents having alkyl groups having from 8 to 22 carbon atoms, preferably from 10 to 20 carbon atoms, and more preferably from 12 to 14 carbon atoms.

Alkyl glyceryl ether sulfonates are derived from ethers having the appropriate non-branched alkyl groups, but these can be derived from the corresponding synthetic or natural alcohols.

Small et al., U.S. Pat. Contains a lake. The mild personal care products of the present invention exhibit improved processability than the mild personal care products patented by Small et al. In other words, the improved soap bars of the present invention are also more workable than similar AGS soap bars. The soap bars of the present invention are also superior in terms of strength and lubrication of the soap bar.

Preferred mild non-ionic detergents are alkyl glycosides and glucose methyl esters that can be mixed with at least one of the mild, anionic or amphoteric detergents used in the compositions of the present invention.

Acyl isethionate is a preferred additive. Acyl isethionates are esters of an alkali metal salt of isethionic acid with higher aliphatic fatty acids which can be represented by the following formula:

R - C00 - CH ₂ - CH ₂ - SO ₃ M where

R is an aliphatic alkyl group or a mixed aliphatic alkyl group of a higher fatty acid or a mixture of fatty acids having a carbon number of from about 6 to about 20, preferably from about 8 to about 18, such as coconut fatty acids or other equivalent carbon atoms. C 18 chains are preferred as non-foaming, non-wastewater loading fillers, while medium (C 12 to C 14) chains are preferred as foaming synthetic detergents; and where «

• · · · · · · · · ί »<

• · · · * · · · · · · · Λ

An alkali metal cation such as sodium or potassium or ammonium or an organic basic amine such as triethanolamine, triisopropanolamine, diethanolamine and ethanolamine. The preferred cation in AGS and acyl isethionate salts is sodium.

A preferred preferred kneaded soap bar according to the Flex test comprises (1) about 5 to 25% by weight, preferably about 10 to 20% by weight, of C 16 to C 18 alkyl sulfates, and (2) about 5 to 50% by weight, preferably about 10 to 30% by weight of magnesium soap (see Example 7). This preferred soap bar also requires a mild, synthetic detergent to form a foam. The ratio of alkyl sulfates to magnesium soap may be from about 3: 1 to about 1: 6, preferably from about 1: 2 to about 1: 4. This non-wastewater, non-foaming, synthetic detergent additive is a surprisingly and unexpectedly superior and all-inclusive additive for ultra-mild synthetic detergent foaming, such as alkyl glyceryl ether sulfonate and / or coconut fat isethionate in personal cleansers. The synthetic detergent additives provide a surprisingly acceptable improvement in the workability of the soap bar, but do not significantly affect the lightness of the bar or the required physical properties of the bar.

C 16 -C 18 alkyl sulfates are derived from the corresponding saturated straight-chain alcohols. C 16 -C 18 alkyl sulfates are defined to contain at least about 90%, preferably about 97%,

4 »4444 * · · · 4 W • · ··· 444 4 4 • · · · 4 * 4« · «» «« ·· · «« «9 4

- the aforementioned C 18 -C 18 alkyl groups. The weight ratio of C 16 alkyl groups to C 18 alkyls is generally from about 4: 1 to about 1: 4. The commercially available alkyl sulfate formulation of SIPON EC-111 (formerly SIPEX EC-111) is sodium cetearyl sulfate containing 60% C16 and 36% C18 alkyl. SIPON EC-111 is a product of the Alcolac Company (Baltimore, MD). Another source is Henkel Corporation (Amber, PA). Henkel's sodium cetearyl sulphate, LANETTE E, which is estimated to contain 50 to 50% of C16 and C18 alkyl groups on 50% to 50%, is marketed as an emulsifier.

Unless otherwise specified, percentages, ratios, and fractions refer to the total weight of the composition or detergent. Unless otherwise specified, all recipes, levels and thresholds are approximate values. Some advantageous percentages and ratios are given below.

The foaming synthetic detergent comprises from 20% to 50% by weight of the soap bars according to the invention. A preferred soap bar comprises: about 25% to about 45% foaming, mild, synthetic detergent; about 15% to about 20% of a non-waste water synthetic detergent additive such as cetearyl sulfate; from about 10% to about 50% magnesium soap; and from about 1% to about 10%, preferably from 2% to 9%, of free fatty acids; from about 0% to about 8%, preferably from about 0.2% to about 2%, of a polymeric skin care agent; and 2 to 15% water, preferably 4 to 10% water.

The soap bars of the present invention contain a wastewater loading additive (free fatty acid, wax, etc.) relative to the foaming, mild, synthetic detergent, at about 0.1: 1 to 4,444,444. 4 to 1: 1, preferably 0.2 to 1 to 0.9: 1.

In the soap bars of the present invention, the ratio of waste water load to non-waste water load (including Mg soap) is 0.1: 1 and 1: 1, preferably 0.2: 1 and 0.9: 1, while Mg without soap the ratio is between 0.4: 1 and 30: 1.

In the soap bars of the present invention, the ratio of foam-forming mild synthetic detergent to non-sewage load (Mg soap) is 0.2: 1 and 3: 1, preferably 0.3: 1 and 2: 1, whereas in the case of Mg soap it is the ratio is 0.5: 1 to 35: 1.

The ratio of magnesium soap in the soap bars of the present invention to the foaming synthetic detergent is 1:10 to 1: 0.4, preferably 1: 5 to 1: 0.5, more preferably 1: 4 to 1: 0.6.

The ratio of magnesium soap in the soap bars of the present invention to all synthetic (foaming + additive) detergent (s) is 0.1: 1 and 3: 1, preferably 0.2: 1 and 2: 1, more preferably 0.3: 1 to 1.5: 1.

In the soap bars of the present invention, the ratio of magnesium soap to free fatty acid is 50: 1 to 0.5: 1, preferably 30: 1 to 1: 1, more preferably 15: 1 to 2: 1.

The ratio of Mg soap in the soap bars of the present invention to a waste water loading additive (fatty acid, wax, etc.)

0.3: 1 to 5: 1, preferably 0.4: 1 to 4: 1.

In order to improve lubrication, it should be noted that if the level of magnesium soap is low, for example 10% or less, and if the ratio of total synthetic detergent (s) to magnesium soap is higher than 5: 1, increased lubrication • For the purpose of the · ····, the water content of the soap bar should be about 2 to 7%, preferably about 2.5 to 6%.

More than one foaming synthetic detergent may be used. For example, in the case of AGS, as shown in the examples, about 2% to 25%, preferably about 3% to 20%, more preferably about 4% to about 16% of a very strong foaming detergent such as sodium lauryl sarcosinate can be used.

Other ingredients for soap bars include: non-foaming detergent additives, magnesium soap, waste water additives, polymeric skin care agents, moisturizers, fillers, and the like.

The mild personal toiletries, if present at all, may contain from about 0% to about 8%, preferably from about 0.2% to about 2%, of polymeric skin care products.

A preferred soap bar of the invention may contain from about 0.1% to about 5%, more preferably from about 0.2% to about 2%, of a suitable, fast hydrating cationic polymer. The molecular weight of the polymers can range from about 1000 to about 3,000,000. A preferred polymer may be selected from cationic guar gums having a molecular weight of 2500 to 350,000.

The cationic polymer (skin conditioning agent) was selected from the following groups of compounds:

(I) cationic polysaccharides;

(II) cationic copolymers of saccharides and synthetic cationic monomers, and (III) synthetic polymers belonging to the following groups:

«· · · · · · · · · ······························································ (A ) cationic polyalkyleneimine (Β) cationic ethoxy-polyalkyleneimine, and (C) cationic poly [N- [3- (dimethylamino) -propyl] -Ν - [3- (ethyleneoxyethylene) dimethyl] amino) propyl] urea dichloride}.

A particular example of a cationic polysaccharide group is cationic hydroxyethyl cellulose (JR 400; Union Carbide Corporation); cationic starches (Stalok 100, 200, 300 and 400; Staley Incorporation); guar gum-based cationic galactomannans (Galactasol 800 series; Henkel Incorporation) and Jaguar series (Celanese Corporation).

Examples of copolymers of saccharides and synthetic cationic monomers are cellulose derivatives (e.g., hydroxyethyl) cellulose and N, N-diallyl-N, N-dialkylammonium chloride (Celquat; National Starch Corporation).

Cationic synthetic polymers useful in the present invention include polyalkyleneimines, ethoxy-polyalkyleneimines and cationic poly {N- [3- (dimethylamino) propyl] -Ν - [3- (ethyleneoxyethylene) dimethyl]. -amino) -propyl] -urea-dichloride sold by Miranol Chemical Company, Incorporation under the trade name Miranol A-15; CAS Registry No. 68555-36-2.

Preferred cationic polymer skin conditioning agents are guar gum cationic polysaccharides having a molecular weight of between 1,000 and 3,000,000. More preferred are those having a molecular weight of 2500 to 350000. The backbone of these polymers is a polysaccharide of galactomannan units with a cationic degree of substitution of 0.04 to 0.80 per anhydroglucose unit and the substituent ka22. · ···· ···· ··· ··· thionic group is the (2,3-epoxypropyl) trimethylammonium chloride adduct on the naturally occurring polysaccharide backbone. Such materials include the Jaguar C-14-S, C-15 and C-17 of Celanese Corporation. In order to obtain the benefits of the present invention, the physical and chemical properties of the polymer must allow for satisfactory and complete hydration of the compound and then be well incorporated into the soap material.

Further additives of the compositions according to the invention may be selected for various purposes. For example, perfumes may be used in skin cleansing products, typically in the range of 0.1 to 0.5% of the composition. Alcohols, hydrotropic substances, dyes and fillers such as talc and clay can also be used. Preservatives, such as sodium ethylene diamine tetraacetate (EDTA), usually in amounts less than 1% of the composition, may also be added to prevent the growth of microorganisms. Antibacterial agents may also be added to the composition, typically up to 1.5%.

A preferred bar of the present invention may contain from about 0.5% to about 4.0%, preferably from about 2.0% to about 3.5% trisodium phosphate.

The following United States patents refer to or refer to ingredients and preparations which may be used in the mild personal toiletries of the present invention and are hereby incorporated by reference in their application.

Patent specification

Beyon Opponent (s)

number surrender ide j e 4,234,464 1980th 11th Morshauser 4,061,602 1977th 12th Oberstar et al 4,472,297 1984th 09. Bolich et al 4,491,539 1985th 01. Hoskins et al 4,540,507 1985th 09. Grollier 4,673,525 1987th 06th Small et al 4,704,224 1987th 11th Saud 4,812,253 1989th 03. Small et al 4,820,447 1989. 04th Medcalf et al

Magnesium soaps may be added to the composition as they are, or may be prepared in situ by, for example, adding a base such as magnesium hydroxide to convert free fatty acids in the composition.

Another preferred and suitable method of making the soap bars of the present invention is to use a synthetic detergent neutralized with an alkali metal hydroxide or carbonate solution to which the salting electrolyte has already been added (if sufficient electrolyte had not been formed by neutralization or other technological steps). , for example, into a soap mixer kettle. Add some water to increase the fluidity of the material and then add sodium soap, preferably about 30% water. These ingredients are mixed and then a sufficient amount of a water-soluble alkaline earth metal salt, such as magnesium sulfate or chloride or calcium chloride, is added to convert a portion of the water-soluble soap to water-insoluble soap to form a sodium salting electrolyte. Preferably, the magnesium soap is prepared before the synthetic detergent is added to the mixture. Stirring is continued until the equilibrium state of magnesium soap formation is reached. Of course, the desired adjustment of the water-soluble soap content can also be made after the magnesium soap is formed. There are two advantageous methods of making a preferred mild personal toiletries:

I. Neutralization in a soap mixing pan

1. Add a specified amount of AGS paste at 65 ° C to the mixing pan.

2. Dissolve a defined amount of sodium chloride or sodium sulfate outside the mixing bowl in water at 75 ° C to a final moisture content of 50% in the mixing pan, including all the raw materials. When the electrolytes have dissolved in the warm water, pour the mixture into the mixing pan.

3. Turn on the mixer and the recirculating pump (if equipped) and maintain the temperature of the mixer between 7 and 85 ° C by controlling the heating and cooling.

4. Add the specified amount of titanium dioxide powder to the mixing pan.

5. Add the specified amount of room temperature magnesium hydroxide powder into the mixing pan. This material can also be used in the form of sludge. Stir until the powder appears to be completely dissolved.

6. Add the specified amount of fatty acid to the mixing pan to produce the magnesium soap. It is perfect if the acid can be added in a melted form at 75-85 ° C. If added in powder form, continue mixing until the powder is visibly melted.

7. Add a defined amount of room temperature sarcosinate solution to the mixing pan. Allow the temperature of the stirrer to return to the desired value.

8. Add the specified amount of melt, 75 -

- Paraffin at 85 ° C into the mixing pan. When adding paraffin chips, allow to melt completely.

9. Allow the contents of the stirrer to mix thoroughly and react until the pH of the mixture is 7.3 -

- 8.0 while maintaining the temperature of the stirring bath at 75-85 ° C. This usually takes 20 to 40 minutes.

10. Add the specified amount of excess fatty acid to the mixing pan at the same temperature as previously added. Leave to stir for another 10 minutes.

II. Ion exchange in a soap mixing pan

1. Add the specified amount of soap, fatty acids, and triglyceride mixture into the mixing pan and mix.

At 88 ° C until homogeneous for about 10 minutes.

2. Dissolve the magnesium chloride in water and add to the mixing pan. Continue stirring at 82-88 ° C until the reaction is complete for about 10 minutes.

3. Add the liquid sodium lauryl sarcosinate, the sodium coconut fat glyceryl ether sulfonate and the amine oxide into the mixing pan and maintain the temperature at 82-88 ° C. Stir until homogeneous, about 10 minutes.

4. Add the desired amount of WSR-35 polyoxyethylene and stir for a further 5 minutes.

I and II. Drying

The contents of the agitator are dried and cooled in a vacuum evaporator chamber equipped with a cooling roller or cooling belt. The cauldron mixture is first heated to about 132 ° C with a heat exchanger and then dried under reduced pressure in a distillation chamber above the cooling roller or cooling strip. The cooling roll or belt gives a uniform, thin and cold product (29-35 ° C) in the form of flakes or chips. The fluff typically has a moisture content of 2 to 12%, preferably 6 to 8%. The options for controlling the moisture content as desired include: (1) increasing or decreasing the vapor pressure in the heat exchanger; (2) increasing or decreasing the stirring speed of the pan relative to the heat exchanger; and (3) raising or lowering the temperature of the cauldron mixture relative to the heat exchanger.

blending

The fluff mass is weighed and mixed in a metering mixer until the flakes are of uniform size. A certain amount of fragrance is added to the flakes and blended until the desired level of fragrance in the product is achieved. The perfumed flakes are then transferred to the mill's hopper or directly to the press.

Grinding (if desired)

The first roll of the three-cylinder soap mill is set at 38 ° C and the other two rolls at 21 ° C. The soap is passed through the mill several times until the mixture of fragrance and flakes is homogeneous.

Pressing and pressing

The cylinder temperature of the press is set at 21 ° C and the temperature of the pouring tube is set at 38-49 ° C. The ideal press is a two-stage press that allows a vacuum of about 51 to 85 kPa. The pressed soap bar is approx

It can be cut into 12.5 cm pieces and molded with a cold forming tool using, for example, alcohol as a tool lubricant fluid.

Examples

The following examples and methods are provided to illustrate the invention and are not intended to limit its scope. A detailed process for the preparation and purification of alkyl glyceryl ether sulfonate is disclosed in U.S. Patent No. 2,988,511, cited above. Percentages, ratios and parts by weight refer to the total weight of the composition or detergent, as indicated, unless otherwise noted. All levels and limits, temperatures, results, etc. is an approximate value unless otherwise specified.

The mild personal care detergents described in Examples 1-7 were prepared using the preferred method of neutralization in a soap mixing pan described above. In Example 8, magnesium chloride was added to the sodium soap to form the magnesium soap by ion exchange before mixing with the synthetic detergent. The soap described in Comparative Example A was prepared in a similar manner to that described in Examples 1 to 7 except that sodium hydroxide was used instead of magnesium hydroxide and this soap was used as a reference for the mildness and lubricity test. Soap B was prepared according to Comparative Example B and used as a second comparative basis for testing for mildness and lubricity. Comparative Example C is an excellent commercial soap bar that was used in the comparisons as a typical multipurpose soap. Example 3 is the preferred general soap bar for lightness, foaming and lubricity.

Two lubricity tests, a paste test and a sensory test, are described below.

Examination of paste (lubrication 1.)

Resources:

1. Hexagonal polystyrene balance plates (10 x 7.5 cm;

Fisher No. 2-202C).

2. Spatula (Fisher No. 14-366A).

Third

4th

Balance to two decimal places.

Room at 48.9 ° C.

Hours Indicator.

Method:

1. Mark and measure the mass of the required number of weighing plates (2 plates per sample; one denoted by M and the other by S).

2. Weigh and record the weight of the intact soap bar. Place the soap bar in the known weight plate, marked S.

3. Add 30 ml of room temperature tap water to the bowl containing the experimental soap bar (pour water into the bottom of the balance plate). Add 30 mL of room temperature tap water to the control soap bar. When placing soap bars in the bowls, make sure that the soap bars do not touch the sides of the bowls.

4. Allow the soap bars to soak undisturbed in the balance plates at room temperature for 2 hours.

5. After soaking for two hours, carefully pick up the soap bar and let it drain in the same bowl for 15 seconds.

6. After fifteen seconds, turn the soap bar to the other side and place it on the weighed dish M, which has been pre-weighed.

7. Weigh and record the weight of the soaked bar.

8th

Scrub the wet surface or pulp with soap30

from a rod with a spatula, place in the same weighing pan M, weigh and record its mass. To get the best scraping result, hold the spatula loosely in your hand and take care not to dig into the bar or scrape it too deep. Scraping is complete when the surface of the soap bar is no longer visibly damp or shiny. Individual differences in scraping operations are eliminated, and the results of each test are given relative to the control being tested.

9. Weigh and record the weight of the scraped soap bar.

10. Place both scales and the scraped soap bar in the room at 48.9 ° C for 48 hours to allow water to evaporate.

11. After 48 hours, measure and record the dry mass of the soaking plate, paste plate and scraped soap bar.

12. Calculate the area of the scraped surface of the soap bar as a product of its length and its width.

13. Add the dry weight of the materials in the soaking plate and the pasty plate. This number is the test result in g.

Each series of assays should be controlled and two of each sample should be measured. Up to 7 products (6 samples and one control) can be tested at the same time, and after each 4 samples, a 10-minute break before filling with soaking water, so that none of the soap bars soak for more than two hours.

Sensory examination of lubricity (lubrication 2.)

means

Alathon Soap Bowls

Small volume measuring cylinder

Method:

1. Dampen the soap bar by dipping the surface to be soaked in distilled water and shaking off excess water. This procedure results in a much smoother lubrication.

2. Place the soap bar in the center of the Alathon soap dish in 5 ml of distilled water. Shake the bowl to break the surface membrane of the water. The Alathon Soap Bowl was chosen as the standard because (in U.S.A.) it is easy to obtain and has a low rim.

3. Store overnight (about 18 hours) at constant temperature and humidity (27 ° C; 80% RH). Because this test examines the water-absorbing and water-absorbing properties of soap, standard conditions precede the effects of seasonal changes that may occur in uncontrolled night-time laboratory conditions.

4. Next morning, remove the soap bar gently, lifting it vertically, and invert it for criticism.

Criticism.

Each critic touches the soap bar with his finger and examines the quality and quantity of the paste.

point Value

The quality of the pulp

excellent

Very good pulp

Good pulp (goal to achieve)

Slightly weaker than desired

Still acceptable

Just acceptable

Weak and unacceptable

Very weak

The weakest that is visible

Extremely weak

Clinical examination of toilet soaps.

The clinical method for testing the skin mildness of toilet soaps is described below.

Forearm wash test.

The washing is done by a technician. In each subject, 8 formulations are tested simultaneously, four per forearm. The test method per faculty is as follows:

1. Put a 3M surgical patch on four,

With a 3.2 cm diameter pre-cut hole for your volunteer forearm. Align the patch with the center of the inner surface of the forearm so that the lowest treatment area is further away from the wrist.

2. Dampen the forearm with warm water (35-40 ° C).

3. Dampen a non-woven paper towel (Masslim Towel, Chicopee Mills, New Brunswick, New Jersey) with warm water. Rub the towel with the appropriate product to be examined.

in circular motion for 6 seconds.

4. Rotate the towel over the test area for ten seconds.

5. Leave the foam of the test product on the test site for 90 seconds.

6. Rinse the test sites with warm water (35-40 ° C) for 15 seconds.

7. Dry the test area with a soft, disposable (Bounty) paper towel.

8. Wait 2 minutes and repeat the whole procedure.

9. The whole procedure should be done twice a day for four days and once on the fifth day, which means a total of 17 washes. Daily tests should follow each other approximately every 3 hours. Visual inspection should be carried out on the third day immediately before the second wash and on the fifth day 3 hours after the last wash. Significant dehydration and redness should be scored by both tests.

The scales used for scoring are as follows:

- Dehydration rating scale:

Totally intact skin

1,0 Micro-cracks in patches and / or mild drought and possibly in small patches peeling off. Their distribution was extensive.

2.0 Extensive mild drought. Initial cracking or tiny, rising epithelial peeling may occur.

3.0 Extensive moderate drought and / or moderate cracking and exfoliation.

4.0 Extensive severe drought and / or severe cracking and exfoliation.

5.0 Extensive deep cracking and rising peel. Drought may be, but not striking. There may be bleeding cracks. 6.0 Extensive, very severe cracking. Eczema Relief-

may occur. There may be bleeding cracks. Exfoliation is extensive and may be disappearing.

- Redness (erythema) rating scale:

0 No redness 1.0 Just a perceptible redness 2.0 Slight redness 3.0 Moderate redness 4.0 Severe or thorough redness 5.0 Very severe redness 6.0 Extremely severe redness

By extensive term, it is understood that more than 50% of the surface of the forearm exhibited the characteristic symptom. The whole units of the rating scale are used for extended states. Half units are used to describe the transition states.

Forearm Washing Test (Flex Test)

First Dampen a sponge in a warm, approximately 37 ° C

water until completely saturated.

Second Squeeze the sponge three or four times the excess

to remove water.

Third Foam the sponge directly into the soap panrúdon, with circular motion for 10 seconds. 4th Wash the forearm surface for 60 seconds (2-3

in a circular motion every second).

5. Thoroughly rinse the washed surface and dry it with a paper towel (15 seconds rinse recommended).

6. The above procedure should be performed three times daily for five consecutive days, equivalent to a total of 15 washes. There should be approximately 2 hours between daily washes. Inspect the test area immediately before the next wash. The last test should be done approximately two hours after the last wash.

7. The following scale of redness is used for evaluation:

No redness (erythema)

Mild redness (spots and / or barely noticeable)

Moderate redness (smoother pink-red)

Distinct redness (even, relatively brighter or deeper red)

Intermediate states can be used to describe the points 0.5, 1.5, 2.5 and 3.5, if necessary.

8. The test will not be continued if the score is 2.0 or higher. In this case, the score of 2.0 is also considered as the result of missed experiments.

9. The products are compared by statistically comparing scores of 2.0 or higher. The lower the number of such points, the lighter the product to be judged.

In the following examples, which contain magnesium soap, the magnesium soap may be replaced in whole or in part by other alkaline earth metal soaps, such as calcium, zinc,

or other soaps which are substantially as insoluble as magnesium soaps.

Table 4

Ingredients Example 1. Example 2. Example 3. Example 4,% by weight% by weight

Magnesium soap

(Coco) - 33.0 - - (Laurina) 29.7 - - 22.5 (Stearate *) - - 38.0 - (75 tallow / / 25 palm intestines) - - - - Sodium soap (50 tallow / / 50 Palm Gut) 1.4 - - - Sodium stearyl sulfate 11.8 - - - Sodium kókuszzsír- glyceryl ether sulfonate 15.7 25.0 21.0 40.9 Sodium lauryl sarcosinate 6.9 7.0 12.0 7.5 C12 -C13 alkyl dimethyl amine oxides - - - - lauric 2.9 - 3.0 3.2

coconut acid - 3.0 - - NaCI 1.0 1.0 1.5 1.5 Sodium sulfa 1.5 1.5 1.85 1.5 Paraffin (m.p. 55 ° C) 14.7 17.0 10.0 10.7 triglyceride 1-8 - - - - Poly (oxyethylene) - - - - Titanium dioxide 0.2 0.2 0.2 0.2 fragrance 1.0 1.0 1.0 1.0 Water 10.1 8.7 9.3 6.8 Other 3.1 2.6 1.7 4.2 Altogether 100.0 100.0 100.0 100.0 132 of Emersol (Emery Industries) actually stearate and a mixture of laurinate with a pour point of 5 to 5 ° C, and maxi iodine number of malis 0.5. 1 . example Example 2. Example 3. 4th . example. Lubrication 1 (pulp) Wet (g) * 0.66 1.44 1.51 1.03 Dry (g) 0.58 0.52 1.11 0.86 Average 0.62 0.98 1.31 1.40

Lubrication 2. (sensory)

5 ml ** 7.5 7.5 6.5 7.5 pH 8.02 7.45 7.55 7.41 soap / FFA ratio 10: 1 11: 1 12.2: 1 7: 1

* Lower value is better.

** Higher value is better.

«** ·

In Examples 1-4, the proportions of all foaming mild detergent, magnesium soap, non-effervescent, non-foaming detergent, and effluent-loading additives are as follows:

Example 1. Example 2. Example 3. Example 4. All mild foaming synthetic detergents 21.5 30.25 31.53 45.54 magné z ium-s z appan 29.7 33.0 38.0 22.5 not wastewater, non-foaming additives (Including Mg soap) 42.6 34.75 39.47 25.36 s zenvehl z-1e opacifying additives (FFA, wax, triglyceride) 17.68 20.0 13.0 13.9 Mg Soap / Total triglycerides 0.9: 1 1: 1 1.15: 1 0.5: 1

Ingredients

Table 4. (continuation) Example 5. 6th . example. Example 7. Example 8. % by weight % by weight % by weight

Magnesium soap

(Coco) - - - (Laurina) 12.8 24.0 - - (Stearate *) - - 10.0 - (75 tallow / / 25 palm intestines) - - - 27.6

• ·

·· · ·

Sodium soap (50 tallow / / 50 Palm Gut) - - - - Sodium stearyl -sulfate - - 14.0 - Sodium kókuszzsír- glyceryl ether sulfonate 17.1 35.0 32.0 13.6 Sodium lauryl sarcosinate 7.4 7.0 10.0 15.9 C12 -C13 alkyl dimethyl amine oxides - - - 2.3 lauric 3.2 3.0 5.0 - coconut acid - - - 7.9 NaCI 1.5 1.5 1.5 3.7 Sodium sulfa 1.5 1.5 1.85 0.6 Paraffin (m.p. 55 ° C) 12.6 13.0 13.0 - triglyceride 1-8 - - - 16, 1 Poly (oxyethylene) - - - 0.4 Titanium dioxide 0.2 0.2 0.2 0.25 fragrance 1.0 1.0 1.0 1.0 Water 7.4 10.2 7.5 9.0 Other 3.2 3.6 3.9 1.6 Altogether 100.0 100.0 100.0 100.0

Emersol 132 (Emersol Industries)

- 40 - • · · · • · • · * »» ··· »- * · · * · · · • · · • · · · »· · 9 • · · · · · · ♦ ·· ·· · Example 5. Example 6. Example 7. Example 8 Lubrication 1 (pulp) Wet (g) * 2.35 2.38 4.26 N. M. Dry (g) 1.37 1.64 2.00 N. M. Average 1.86 2.01 3, 10 N. M.

Lubrication 2. (sensory)

5 ml * * 7.5 7.0 6.5 8.0 pH 7.97 7.57 7.59 8.00 soap / FFA ratio 4: 1 8: 1 2: 1 3.5: 1 * The lower value is a newer.

** Higher value is better.

N.M .: Not measured

In Example 7, the ratio of total synthetic detergents to 56%, water to 7.5%, and magnesium soap to all synthetic detergents was 0.18: 1. . Note that in Example 5, the ratio of total synthetic detergents

56.6%, magnesium soap: total synthetic detergent ratio 0.22: 1 but higher, instead of 10% 12.8% has magnesium soap ratio and better lubricity regardless of Examples 5 and 7 the same water content.

It should be noted that in order to improve lubricity, if the ratio of magnesium soap is low, for example 10% or less, and if the ratio of total synthetic detergent to magnesium soap is higher than 5: 1, the ratio of water is about 2-7%. should preferably be from about 2.5% to about 6%.

· · · *

Ingredients . spreadsheet

Example A. Example B. Example C,% by weight% by weight

Sodium C12: C14: C16: C18 - 58: 21: 19: 9% (AGS) 48.2 - - Sodium lauryl sarcosinate 12.5 - - Sodium kókuszzsír- -izetionát - 49.1 - Sodium alkylbenzyl sulfonate - 2.0 - lauric 6.5 - - stearic 9.8 25.0 - NaCI 5.3 0.5 0.81 Sodium sulfate 1.3 - - Sodium Isethionate - 6.0 - Sodium soap (60 Sterols / 40 Laurins) 7.2 12.0 - (85 tallow / 15 coconut fat) - - - (75 tallow / 25 coconut fat) - - 75.25 Titanium dioxide 0.25 0.4 - fragrance 1.0 1.0 0.16 Water 3, 5 4.0 23.5 Other 4.4 - 0.28 Altogether 100.0 100.0 100.0

·> · ·· ·

Example A is an ultra-mild soap bar with very excellent lubricity, approximately the same as B-bar, which is a commercially available soap / synthetic soap bar. Comparable mild soap bars of the present invention, such as Examples 1-6 and 8, have better lubricity than the soap bar of Example A as well as the soap bar of Comparative Example B. Comparative Example C is a cutting edge pure soap bar to demonstrate that the mildness of the soap bars of the present invention far outweighs it.

Example A. Example B. Example C Lubrication 1 (pulp) Wet (g) * 3.20 3.66 - Dry (g) 1.50 1.43 - Average 2.35 2.55 - Lubrication 2. (sensory) 5 ml ** 7.5 7.0 7.0 PH 7.3 7.3 9.5 soap / FFA ratio 0.4: 1 0.5: 1 1: 1

* Lower value is better.

** Higher value is better.

THE used in examples AGS detergents carbon chain length set from splitting the following: %-ancestor gold C16-C18 Example C12 C14 C16 C18 together (%) 1-8. 68 25 7 - 7 THE. * 58 21 10 9 19

* Comparative Example A · »·

Examples 1-6 have an average lubricity better than Comparative Example A, regardless of the distribution of the latter higher AGS alkyl chain, with the presence of more C16 and 9% C18 alkyl chains relative to the weight of all AGS. The result of the examination of weakness is the following (Flex test):

redness C. example 2.42 4th example 1.18 Third example 0.90 7th example 0.68 B example 0.65-1.29 8th example 1.59 earlier test THE. example 1.09 earlier test

In the above Flex test, the lower the degree of redness (erythema), the milder the personal cleanser. The highest redness score of 2.42 was found in the soap bar of Comparative Example C, a cutting-edge general purpose soap bar. Examples 4, 3, and 7 have redness grades similar to soap bar B, with measured values ranging from about 0.65 to about 1.29, the lowest and highest of the four assays. Redness values 4, 3 and 7 were 1.18, 0.90 and 0.68, respectively. The redness values of Example 8 and Comparative Example A are better than those of the general purpose soap bar of Example C and are close to those of B-soap.

The 0.65 and 1.29 score points for the B soap bar are the lowest and highest values for the Flex tests performed in parallel with the C, 4, 3, and 7 bar samples, respectively. The test results for Examples 8 and A, although not prepared at the same time as Examples C, 4, 3, and 7, indicate that Example 8 is not as good as B but lighter than B. General purpose soap bar of Comparative Example C. Note that a

The fatty material of Example 8 is less advantageous, in particular in terms of lower pour point (37) and higher iodine number (38), than in Examples 4, 3 and 7. The soap bars and iodine numbers according to Examples A4, 3, 7 and 8 are as follows:

Example Pour Point Iodine value 4 41 - 44 maximum 1, 0 3 54.5 - 55.5 maximum 0.5 7 54.5 - 55.5 maximum 0.5 8 37 38

However, Table 4 shows that Example 8 is a lubrication

Value 2 is excellent.

The results of the forearm clinical trial are as follows (lower is better):

Example Borage

8. 1.18

A. 1.19

Drought

1.68

1.66

THE.

1.16 1.70

B

1.70 S

2.22 S

f

S: the result is significant at 90-95%.

♦ ♦ · · * ··· ... t ·

: .. ... ·%. · * ·· *

The results of a forearm clinical trial indicate that Examples 8, 9 and 2 are all better than soap B for both redness and dryness. Examples 8 and A are nearly the same, A. is significantly better than B.

It can be seen from Tables 4 and 5 that the lubricity of Example 2 is also better than that of B-soap: the mean Grease 1 is 0.98 for Example 2 and 2.55 for B-soap, which is a significant for example. Grease 2 values are 7.5 for Example 2 and 7.0 for B-soap, which is a slight advantage over

Example 2.

The organoleptic characteristics of the soap bar of Example 2 were compared with a B soap by a jury. The result is that the soap bar of Example 2 has the same density, smoothness and softness as B-soap. The result of the compactness is surprising considering the 33% magnesium soap content of the soap bar of Example 2.

Claims (11)

PATENT CLAIMS A mild personal cleanser comprising from about 20% to about 50% foaming, mild synthetic detergent and from about 5% to about 50% magnesium soap; wherein the ratio of said foaming, mild synthetic detergent to said soap is from about 10: 1 to about 0.4 to about 1; said soap bar having a pH of about 6.5 to about 8.5 in a 1% aqueous solution, measured at 25 ° C. The mild personal care detergent of claim 1, wherein said magnesium soap has a ratio of from about 10% to about 45%; said ratio being from about 5: 1 to about 0.5: 1; said soap bar having a water content of from about 2% to about 15%; and said pH is about 7-8. A mild personal cleanser according to claim 1 or 2, wherein the ratio of said foaming, mild synthetic detergent to said magnesium soap is from about 4: 1 to about 0.6: 1, and said water content being from about 4% to about 10%; wherein said soap bar preferably comprises from about 1% to about 10% free fatty acid, and wherein said magnesium soap has a ratio of from about 50: 1 to about 0.5: 1, and wherein said soap and free the fatty acid has a pour point of 15-50 ° C and an iodine number between 0 and about 50. '· · ♦ *. · **. ! ·· · · ······· ♦ · * ···· A mild personal toilet product according to claim 1, 2 or 3 wherein said soap bar comprises from about 2% to about 9% free fatty acid and said magnesium soap and free fatty acid the ratio is from about 15: 1 to about 2: 1 and wherein said iodine number is from 0 to 15 and said pour point is from 40 to 75 ° C. A mild personal cleanser according to claim 1, 2, 3 or 4, characterized in that said magnesium soap is produced either by ion exchange or by neutralization. A mild personal toilet product according to claim 1, 2, 3, 4 or 5 wherein said soap bar has an electrolyte content of from about 1% to about 10%, preferably from about 2% to about 5%. A mild personal toilet product according to claim 1, 2, 3, 4, 5 or 6, characterized in that said soap bar contains from 1% to 40% hydrophobic material which is a wax. has been selected from; and other hydrophobic materials including C8-C18 free fatty acids; mono-, di- and triglycerides; C 8 -C 18 fatty alcohols and mixtures thereof; wherein said composition comprises up to about 25% of said waxes and up to about 15% of said other hydrophobic materials. 8. A mild personal care detergent according to claim 7, wherein said wax ratio is about 5% to - 48 ················································································································································································································· · and / or wherein said soap bar comprises from about 5% to about 40% non-waste water synthetic detergent filler; and wherein said non-waste water synthetic detergent filler comprises at least 90% saturated alkyl chains of 16 to 18 carbon atoms; and wherein said synthetic detergent filler is preferably present in an amount of from 10 to 35%. 9. A mild personal cleanser comprising from about 20% to about 50% foaming mild synthetic detergent and from about 5% to about 50% magnesium soap; wherein the ratio of said mild, mild synthetic detergent to said soap is from about 10: 1 to about 0.4 to about 1; comprising from about 1% to about 10% electrolyte and from about 2% to about 15% water; said soap bar having a pH of about 6.5 to 8.5 in a 1% aqueous solution, measured at 25 ° C; and wherein said mild foaming mild detergent is a C12-C14 alkyl glyceryl ether sulfonate or a C12-C14 sarcosinate or a mixture thereof; and wherein the ratio of said sarcosinate is preferably from about 2% to about 25% by weight of the soap bar and said pH is from about 7-8. 10. A mild personal cleanser as claimed in claim 9, wherein said soap bar contains from 1% to 40% hydrophobic material selected from waxes; and other hydrophobic materials including C8-C18 free fatty acids; mono-, di- and triglycerides; 8-18 wherein it contains • * ··· ···· carbon fatty alcohols and mixtures thereof; up to about 25% of said waxes and up to about 15% of said other hydrophobic materials; wherein said sarcosinate is from about 3% to about 20%; and wherein said wax ratio is preferably from about 5% to about 20%; and wherein said soap bar preferably contains from 5% to 40% non-waste water synthetic detergent additive; more preferably, said non-waste synthetic detergent additive comprises at least 90% by weight of saturated alkyl chains of 16 to 18 carbon atoms and said synthetic detergent additive in a proportion of 15 to 20%. 11. A mild personal cleanser according to claim 10, wherein said mild detergent mild detergent is present in an amount of from about 25% to about 45% and said non-wastewater synthetic detergent in an amount of from about 15% to about 15%. 20%; and the ratio of said magnesium soap