SK101493A3 - Personal cleansing bar - Google Patents

Abstract

This invention is an improved mild personal cleansing syndet bar comprising: long chain alkyl sulfate having essentially saturated C15-C22, preferably C16-C18, alkyl chains, more preferably cetearyl sulfate, a high lathering, mild synthetic surfactants comprising C12-C14 alkyl isethionate, soap, fatty acids, and paraffin wax, preferably a high melting point paraffin wax. The bar has good processability, improved smears, and good in-use properties without meaningful lather negatives.

Description

Personal cleaning stick.

Technical field

The present invention relates to personal cleansing bars based on synthetic surfactants and to a process for their production.

State of the art, techniques

Since its inception in history, soap has helped secure two of our greatest treasures, namely the health of us and our children. Health is directly related to purity. The data show that the greater the soap consumption in the country, the lower the infant mortality.

In industrialized countries, soap is the most commonly used and readily available personal hygiene product for daily body wash. Soap is also the cheapest product we use in proportion to its utility value. In many less fortunate countries, both laundry and toilet soaps are still rare and expensive.

Soap is most likely the oldest toiletry and despite easy availability. is still rare in many countries in most parts of the world. The earliest literary data on soap refer to wool washing and were found on the Sumerian clay tables dating from 2500 BC. Sumerian was the language spoken in the Tigris and Euphrates rivers, now southern Iraq. Patriarch Abraham and his family came from Sumeria. Another Sumerian table from 2200 years BC shows a system composed of water, alkali and cassia oil.

Cleanliness is essential for our well-being. Clean body, cleansing bath, clean home and clean environment are the norm today. (Soap Technology for the 1590's, L. Spitz et al., American Oil Chemists ' Societies, Champaign, Illinois, pp. 1-2). This reference deals with syndicated and combined sticks, especially p. 209-229.

Personal cleaning sticks based on synthetic surfactants are now of great interest as they can be selected to be milder in terms of

- effect on the skin as soap-based products. However, this subtlety is related to negative phenomena for both the manufacturer and the consumer. Bar soap manufacturers have experience of their poor production due to the sticky nature of such products and expensive raw materials. Consumers are experiencing shortcomings in the oenability, spreadability, softness of the bar and, consequently, the high wear and tear.

The use of paraffin wax in synthetic surfactant bars is known per se. However, known bars suffer from deficiency; they are not fine or little foam. E.g. U.S. Pat. No. 2,653,513, van Dijck et al., Issued September 29, 1953, deals with bars containing 80% synthetic anionic surfactant (selected from secondary or primary sodium alkyl sulfates or sodium dodecylbenzenesulfonate), 18% paraffin with a melting point (tt) of up to 66 ° C and 2% sodium alginate. The surfactants used are not fine.

U. pat. no. No. 2,734,870, Lewis, issued Feb. 14, 1956, discloses bars containing 40 to 60% paraffin (m.p. > 52 ° C), 2 to 5% fatty acid, and 60 to 40% sodium alkyl aryl sulfonate. High paraffin levels in these bars result in poor foaming.

U.S. Pat. No. 3,129,118, iveehan, issued April 14, 1964, deals with bars containing 50 to 75% sodium alkylbenzene sulfonate, 5 to 35% stearyl alcohol, 1 to 25% paraffin (mp 52-77 ° C) and 2 to 25% stearyl lvSA. . The abrasive surfactants used result in abrasive products.

U. pat. no. No. 4,151,105, O'Roak, issued April 24, 1979, discloses bars containing 20 to 40% synthetic anionic surfactant (composed of sodium cocoyl isethionate or sodium lauryl sulfoacetate), 10 to 30% paraffin (m.p.

5 to 15% powdered starch, 10 to 30% dextrin and 5% fatty acid. The low melting point of the wax used causes a significant dirt load and results in a low foam volume.

U. pat. no. No. 4,335,025, Sarker et al., Issued June 15, 1982, discloses a method of making syndrome bars containing

-3 wax extension.

SUMMARY OF THE INVENTION

It is a first object of the present invention to provide a composition for a personal cleansing syndet stick that exhibits improved foaming and less wear without compromising rod manufacturing.

The invention relates to improved manufacture, a fine personal cleansing syndrome bar comprising at least about 10% by weight of 15 15-22 having a substantially saturated, preferably 16 16 18 chain, soap, free fatty acid, foaming a mild surfactant containing alkyl 4 alkylisethionate, and selected paraffin wax. The bar has improved wear without compromising foaming.

Fine bar based on synthetic surfactant. (syndrome stick) with improved production, good foaming or less wear (lubricity) represents progress in this sector. Syndet bar comprising: (1) about 10 to preferably about 15 to 35%, ^{C] _5_22's in} Y ^{Hodo c} i6 _] _ 8 ^alk y ¹ sulphonates of substantially saturated chain, (2) about 15 to about 40%, preferably about 18 up to 35%, fine, high foaming, synthetic, surfactant s. at least 10% by weight based on the weight of the stick, alkylisethionátu, (3) about 8-25%, preferably about 10 to 20%, Ο ^ θ> ^preferably substantially saturated fatty acid, (4) about 2 to 15%, preferably up to about 12%, ^] _ o 22 ^{'s ν} 7 ^ ° ^ ⁰¹¹ ^ ^and l ^ ^{12-18, and c} are kokovových soaps, preferably sodium or potassium, (5) from about 10 to 40%, preferably A3I 13 to 35% paraffin wax with an average melting point of 55 ° C to 82 ° C, preferably about 60 to 74 ° C, more preferably about 61 to 71 ° C, (6) about 0 to about 10% of auxiliary plastic binders such as polyethylene glycols or monoglyceride; and (7) about 1.5 to 10%, preferably about 2 to 8%, more preferably about 2 to 5% water.

Without wishing to be bound by any theory, it is preferable to consider that the synthetic rod comprises two separate components: the matrix and the active components. The matrix determines the physical characteristics (workability and wear), while the active ingredients determine foaming and fineness. If the correct matrix is not selected, it may interfere with foam formation, cause poor palpation, decrease or increase the wear rate below an acceptable level, or reduce the fineness of the product. Likewise, the active ingredients must be selected so as to achieve an acceptable level of foaming without adversely affecting the fineness and exchange of the formulations.

Better processability bars enriching the long chain alkyl sulfate and selected binder disclosed in U.S. Pat. U.S. patent applications no. 07/605 514, Schwartz, W.E. Eccard, T.A. Bakken and L.A. Gilbert, filed October 30, 1990; 07 / 647,030, J.R. Schwartz, W.E. Eccard, T.A. Bakken and L.A. Gilbert, filed Jan. 28, 1991, incorporated herein by reference. The present compositions provide bars of better utility in terms of foaming or wear than bars individually in the examples of the aforementioned patent applications.

It is well known that the development of a suitable rod matrix is a delicate act of balancing plasticity and brittleness in order to take into account foaming. Typical rod softener materials such as triglicerides, fatty alcohols, and the like. , the formation of a sufficient plastic matrix is achieved, but the foaming is also reduced.

Other commonly used additive matrix materials, such as salts, polysaccharides, etc., result in the formation of an overly brittle and water-soluble matrix which causes poor spreadability of the bar.

As used herein, the terms "synthetic stick" and also "syndrome stick" mean that the stick has more synthetic surfactant than soap, unless otherwise stated. As used herein, the term "AS syndrome bar" refers to a bar containing an alkyl sulphate surfactant or equivalent, unless otherwise indicated. The term long chain means C 1-4 and preferably C 26-20-20 ^{and the mixture of} C 1-4 alkyl and cocoyl as used herein are synonymous.

The percentages, ratios and parts quoted refer to the total weight of the composition, unless otherwise indicated. All quantities a

-5ranges are approximate unless otherwise stated.

An essential element of the present invention is a surfactant system. The long chain alkyl sulphate (including the following long chain equivalent of synthetic surfactants) is a key element, comprising at least 90%, preferably about 95%, and more preferably about 9% of alkyl chains. %. The long chain alkyl sulphate (and its equivalents) is derived from the corresponding straight chain saturated alcohols. A preferred alkyl sulphate has a ratio of 0 to 60 g alkyl chains in the range of about 100% to about 100% by weight. The commercially available C18-18 alkyl sulphate is SIP144 EC-111 (formerly SIPE4 EC-111). sodium cetearyl sulfate, which is approximately 60% 2 ° ^{C and} 16% ^C] _Q ^ · SIPON EC-111 is sold by Alcolac Company, Baltimore, MD 21226th Another source is Henkel Corp., PA 19002. Henkel's sodium cetearyl sulfate, LANETTE E, is an estimated 5050% alkyl sulphate sold as an emulsifier.

Other long chain surfactants, such as long chain alkyl sulphate equivalents (mostly insoluble), can be used either as total or partial substitutes for long chain alkyl sulphate. Examples include long-chain isethionates, sarcosinates, glyceryl ether sulfonates, etc. Also suitable are acyl esters of isethionic acid salts, with esters of O ^ g ^ _- g of acyl isethionates and no more than 25% or less of ^{a C} ^ 14 y y ^m and ^hunting groups. Preference is given to stearoyl isethionate with 5% C ₁₄ , 50% and 4% C ₁₄ . % C ^ g.

The fineness of the surfactant can be measured by a skin barrier destructive test, which is used to assess the harmful effects of surfactants. In this test, the surfactant is the finer the less it damages the skin layer. Damage to the skin layer (barrier) is measured by the relative amount of radiolabelled water (1 H-H 2 O) that passes from the test solution through the skin epidermis to physiological buffer in the diffuser chamber. This test is described by T.J. Pranz in J. Ivest. Dermatol., 1975, 64, p. 190-195 and U.S. Pat. U.S. Pat. No. 4,675,525, Small et al., Issued June 16, 1987, which discloses a fine synthetic bar based on alkyl glyceryl ether sulfonate (AGS) as well as surfactants. This synthetic bar contains an abnormal alkyl glyceryl ether sulfonate

-6zmes. Surprisingly, skin damage tests show that long chain alkyl sulfates are finer than standard AGS. The long chain alkyl sulphate preferably comprises 15 to 40% by weight of the bars of the invention.

The bars of the invention contain a mild (fine) foaming surfactant in amounts of about 15 to 40%, preferably about 18 to 35%. Examples of high-suds or suds-promoting surfactants, in particular with a milder effect, are: -14 14-14 alkylsulfonate, sodium lauroyl sarcosinate high-suds surfactant means a foam that foams better than an ole chain alkyl sulphate. As defined herein, a fine surfactant is a substance that is finer than sodium dodecyl sulfate.

Numerous examples of surfactants in general are disclosed in the patents incorporated herein by reference. They contain limited amounts of anionic acyl sarcosinates, methyl acyl taurates, N-acylglutamates, acyl isethionates, alkylsulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, tridecetsulfates, protein capacitors, alkylsulfates ethoxylates, mixtures of ethoxylated aminoxys, ethoxylates. sultains and mixtures thereof. Included in the surfactants are alkyl ether sulfates having 1 to 12 ethoxy groups, in particular ammonium and sodium lauryl ether sulfates. The alkyl chains of these other surfactants are Cg_ _22, ^{wherein h} ° f ^not preferred mild nonionics are alkyl glycosides and methyl glucose esters, which can be mixed with anionic or amphoteric surfactants in the compositions of the invention.

The bars according to the invention may have up to about 10% of the high-foaming soft or shorter chain or traditional (coconut) alkyl sulfates while still maintaining the rod fineness requirement.

A preferred synthetic rod comprises a mixture^C] _₂-14^Accuratey^{1 i}· sethionate (SCI) and sodium lauroylsancpsinate in a ratio of about 1: 1 to 3: 1, preferably 1.5: 1 to about 2.5: 1.

The basic plastic binders of the invention are free fatty acid and paraffin wax.

-Ί: γ;

γ · • ϊ:

'{?.· with

ϋ

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· 5 ^:

The fatty acid material desired in the present invention is a material with a hydrocarbon chain length range of about 10 to 22 that is substantially saturated. These fatty acids may be highly pure mixtures with individual chain lengths or crude mixtures derived from fats and oils. Preferred compositions are lauric and stearic acid in a ratio of about 1: 3 to 3: 1, more preferably about 1: 2 to 2.5: 1.

The composition may comprise soaps derived from hydrocarbon chains having a length of about 10 to 22, substantially saturated. It is preferred that the soap is a sodium salt, other soluble soaps may be used. Potassium, ammonium, triethanolammonium soaps and mixtures thereof are acceptable. The soaps are preferably prepared by saponifying in situ the corresponding fatty acids, but may also be added as ready-to-use soaps.

Insoluble soaps e.g. magnesium and zinc soaps are not included in the amount of 2 to 15% soap in the defined composition. However, insoluble soaps may be used as non-foaming, non-precipitating diluents.

An important component of the present invention is a wax having a melting point of about 55-82 ° C, preferably about 60-74 ° C, and most preferably about 61-71 ° C. A preferred paraffin wax is a completely refined, odorless and tasteless kerosene wax and meets the requirements for use in coatings, food and food packaging. Such paraffins are readily obtainable commercially. A very suitable paraffin can be obtained, for example, from The National Wax Co. under the trademark 6975.

The paraffin is preferably contained in the bar, in an amount ranging from about 10 to 40% by weight. The paraffin component is added to the product to achieve skin softness, shape, stability and processing. This also achieves a glossy appearance and a smooth touch of the rod.

Optionally, the paraffin component is supplemented with microcrystalline wax. A suitable microcrystalline wax has a melting point in the range, for example, 60-85 ° C, preferably about 62-79 ° C. The preferred wax is to meet the food grade requirements of microcrystalline waxes. A very suitable microcrystalline wax can be obtained from Witco Chemical Company under the trade name i

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Λ <:

H

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Multiwax X-145 A. The microcrystalline wax is preferably present in the bar in an amount of about 0.5 to 5% by weight. The microcrystalline wax component imparts flexibility to the bar at room temperature.

Auxiliary plastic binders may be added to the bar in an amount of 0-10%. These binders may be selected from monoglycerides, polyethylene glycols, fatty alcohols, sugars, tallow alcohol ethoxylates and mixtures thereof. Other plastic binders are identified in published literature such as J. Amer. · Oil Chem. Soc. 1982, 59, 442. The bonded assembly may include a plurality of plasticizers.

The synthetic rod of the present invention may contain 0 to about 5% of a suitable rapidly hydrating cationic polymer. The polymers have molecular weights of about 1,000 to 3,000,000.

The cationic polymer (skin conditioning agent) is selected from the group consisting of:

(I) cationic polysaccharides (II) cationic copolymers of carbohydrates and synthetic cationic monomers and (III) synthetic polymers selected from the group consisting of (A) cationic polyalkylenimines, (B) cationic ethoxy polyalkylenimines and (G) cationic poly- / N - / - 3- (dimethylammonio) propyl (-Ni) 3- (ethylenoxyethylenedimethylammonio) propyl (urea dichloride).

Specific examples of members of the cationic polysaccharide class include the cationic hydroxyethyl cellulose JR manufactured by _the P

Union Carbice Corporation; Stalok 100, 200, 300 and 400 cationic starches manufactured by Staley .; Inc .; cationic galactomannans based on guar gum Galactasol 800 series from Henkel, Inc., and Jaguar series from Celanese Corporation.

Examples of members of the class of copolymers and carbohydrates and cationic synthetic monomers are those composed of cellulose derivatives (e.g., hydroxyethylcellulose) and N, K-diallyl-N, N-dialkylammonium chloride obtained from National Starch Corporation under the trademark Celguat.

-9 ^; Cationic synthetic polymers suitable for use herein include cationic polyalkylenimines, ethoxy polyalkylenimines and poly (N - [3- (cimethylammonio) propyl] -N '- [3- (ethyleneoxyethylenedimethylammonio) propyl (urea dichloride)]. Finally, the compounds are obtained from Miranol Chemical Company, Inc.,; under the trade name Mironal A-15, CAS reg. no. 68555-36-2.

Preferred cationic polymeric skin conditioning agents of the invention are cationic guar gum class cationic polysaccharides having a molecular weight of 1,000 to (3,000,000). More preferably, the molecular weight is 2,500 to 350,000. These polymers have a galactomannan polysaccharide backbone. units and a degree of cationic substitution in the range of about 0.04 to 0.80 per anhydroglucose unit with a i. e. substituent cationic group which is an adduct of 2,3-epoxypropyltrimethylammonium chloride to the natural polysaccharide backbone (main chain), such as Jaguar C-14- Both the C-15 and C-17 products of Celanese Corporation To achieve the benefits of the present invention, the polymer must have characteristics, either structural or physical, that make it suitable and completely hydrated and then well manageable. into soap mati rice.

Other components of the invention are chosen for a variety of uses. E.g. perfume may be used in the composition of skin cleansing products, usually in an amount of about 0.1 to 1.5% of the composition.

It is also possible to use alcohols, hydrotropes, dyes and

Fillers such as talc, calcium carbonate and dextrin.

Cetarylalcohol is a mixture of cetyl and stearyl alcohol. Protective substances may be added to the cleaning products, e.g. Sodium ethylenedia3 mintetraacetate (EDTA), usually in an amount of less than

J 1% of the mixture to prevent decomposition of the dye or fragrance. Antibacterial agents may also be added, usually at dosages of up to 1.5%.

The following patents disclose or relate to such kits and formulations (kits), which can be used in soap / sync bars according to the invention.

Pat. no. Release Date Inventor (s) 4,234,464 11/1980 Morshauser 4,061,602 12/1977 Oberstar et al. 4,472 29 7 9/1984 Bolich et al. 4,491,539 1/1985 Hoskins et al. 4,540 50? 9/1985 Gruau 4,673,525 6/1987 Small et al. 4,704,224 11/1987 Saudi 4,812,253 3/1989 Small et al. 4,820,447 4/1989 Medcalf et al. 4,954,282 9/1990 Rys et al. synthetic the bars according to the invention have pH 4 to 9 in 1% no

λ. aqueous solution. Preferably the pH is 5 to 8, more preferably about 6.5 to 7.5.

The basic ratios and key ingredients of the present invention are summarized in the following table. It results in wide, advantageous and more advantageous amounts and ratios of some key ingredients.

E.g. the bars according to the invention may comprise a long chain alkyl sulphate in an amount of 10 to 40% by weight of the bar and a foaming fine synthetic surfactant in an amount of 15 to 40% by weight of the bar. Their wide and preferred ratio ranges 6 are individually 2.5: 1 to 0.3: 1 and 2: 1 to 0.4: 1. More preferred and exemplified ratios are in Examples 6 and 7 and are uniformly 0.6: 1 / 0.5: 1. Another example in the following table is a fine fine synthetic surfactant and paraffin, in which the ratios may be individually wide and preferred ratios of 4: 1 to 0.4: 1.

I and 2.5: 1 to 0.5: 1. In Examples 6 and 7, their ratios are individually 1.7: 1 and 0.9: 1.

The percentages, ratios and parts herein are by weight based on the total base of the composition, unless otherwise indicated. All ranges and amounts given herein are approximate unless otherwise indicated.

-11Base ratio table

Foam fine synthetic surfactant

on the substance Fatty acids 'Soaps Paraffin Long-chain alkyl sulphate com Wide: 10 to 40% 2.5: 1 to 0.3: 1 5: 1 to 0.4: 1 20: 1 to 0.7: 1 4: 1 to 0.3: 1 The preferred: 15-35% 2: 1 to 0.4: 1 3.5: 1 to 0.8: 1 12: 1-1: 1 2.5: 1 to 0.4: 1 Form. 6 / Form. 7 0.6: 1 / 0.5: 1 1.5: 1 / 1.5: 1 4: 1 / 3.8: 1 1: 1 / 0.9: 1 Foaming fine synthetic surfactant - Wide: 15-40% ON THE 5: 1 to 0.6: 1 20: 1-1: 1 4: 1-0 Advantageous: 18-35% ON THE 3.5: 1 to 0.9: 1 12: 1-1.5: 1 2.5: 1-0.5: 1 Form. 6 / Form. 7 ON THE 2.8: 1 / 2.8: 1 7.2: 1 / 7.4: 11.7: 1 / 1.8: 1

: ·· 'Λ ··: · 0 :: -i /. ·, ‘· X ·. S x ·: in: ..

Free fatty acids

Wide: 8-25% x ON THE 12.5: 1-0.5: 1 2.5: 1-0.2: The preferred 10-20 % x ON THE 7.1 to 0.8: 1 1.5: 1-0.3: Form. 6 / Form. 1 x ON THE 2.6: 2.1, 6: 1 0.6: 1 / 0.6: soaps Wide: 2-15: x x ON THE 1.5: 1 to 0.05 Preferred: 3-12 µ £ x x ON THE 1: 1 to 0.08: 1 Form. 6 / Form. x x ON THE 0.2: 1 / 0.2: 1 Paraffin wax • Wide: 10-40 % x x x ON THE Preferred: 13-35 % x x x ON THE Form. 6 / Form. Ί x x x ON THE

^x Listed elsewhere in the table.

Laboratory evaluation of the bar The following test procedures are used to evaluate the critical performance characteristics, in terms of fineness and processing of the bar.

-12 Lubricity test

Appliances:

1. 7 = 7 -2O2C Fischer Srand Hexagonal polystyrene weighing pans (4 - 3).

2. r = 7 14-366A Fischer Sard spatula.

3. Balance capable of weighing to two decimal places.

4. Room at 49 ° C.

5. Time measure.

Testing method

1. The weighing pans are numbered and weighed (two weighing pans per sample, the first marked M as a slurry and the second marked S as a dipping bowl).

2. The original bar shall be weighed and its weight recorded. Place the bar in a weighed dish, labeled 3.

3. Add 30 ml of room temperature tap water (along the wall of the weighing dish) to the dish containing the prototype rod. Pour into a dish containing the control rod. 30 ml of tap water at room temperature. When placing the sticks in the trays, care should be taken that the sticks do not touch the sides of the trays.

4. Sticks are soaked in weighing dishes at room temperature for 2 hours.

5. After 2 hours soaking, the rod is carefully removed and dripped into the same bowl for 15 minutes.

6. After 15 minutes the bar is inverted and placed in a weighing pan labeled M.

7. Weigh the soaked bar and record its weight.

8. Moisten the surface or slurry from the stick with a spatula into the same weighing pan marked M, weigh and record. This fine ”degree of craziness. The best scraping results are obtained when the spatula is held loosely in the hand, taking care not to peel or scratch the stick too deeply. As soon as the surface of the bar is no longer wet or shiny, the scraping is complete. In order to eliminate the differences in scraping by the individual, 3a reports the results of each test relative to the control sample in this test.

-13; ··. · = I

9. The scraped bar shall be weighed and noted.

10. Place the soaking dish, porridge dish and scraped stick in a 49 ° C room for 48 hours to evaporate the water.

11. After 48 hours, the soaking dish, the slurry dish and the scraped bar are weighed and their dry weights recorded.

12. The surface area of the scraped portion of the bar is calculated by measuring the length and width (in inches) and multiplying them.

13. The number of dry grams of the slurry (grease) is added to the number of dry grams of the seal. This stingy degree of grease in grams.

All test series have included a control and all samples should be tested in duplicate. At the same time, a maximum of 7 products (6 plus control) can be tested and a 10 minute interval should be maintained between 4 samples for water addition, leaving no products soaked for more than 2 hours.

Foam volume test with hand wash with soap

This test is used to measure the volume of foam to be used to determine the foaming efficiency of cleansing bars on the skin.

The test measures both the final volume of the foam produced and the volume produced after a very short foaming period (to determine the foam's rest). Foam volumes are formed under dirt loading conditions.

The dirt load foam test herein is performed with synthetic dirt. Its composition and method of preparation are given below.

i i

. ·;

Table 1 Synthetic dirt

ingredients

Hyfac ^a,, b * Ί uaurova acid Neo-fat (oil) 14 ^C Neo-fat

Neo-fat 18 ^e

Neo-fat 90-04

Industrene 2269

Materials. % 1.87 1.42 5.68

11.16

5.40

9.81

1.26

-14Paraffin wax 7.30 Sgualane 3.70 Lanolin anhydrous 19.40 Coconut oil 3.30 Loj 29.70

100.00% ^and Emery

Eme ry ^c Armor d *

Armor ^e Armor f

Armor &

Humko

Robeco

Industries, Inc. Industries, Inc.

Cincinnati, O’nio Cincinnati, Ohio

Indus trial Chemical What., Chicago, Illinois Industrial Chemical What. . Chicago, Illinois Industrial Chemical What. . Chicago, Illinois Industrial Chemical What. . Chicago, Illinois

Products, Memphis, Tennessee Chemical, Inc., New York

Approach

1. The above substances are heated with continuous mixing at 71 to 77 ° C.

2. Mix 25 parts of the above system with 25 parts soap solution, consisting of 5 to 80% tallow / 20% coconut and 50 parts distilled water at 66 ° C.

3. Cool the mixture to room temperature with stirring.

4. Store in a covered glass container.

equipment

The following device is being used

1. Water source with spout and controlled temperature. The water source should have a medium hardness (6-9 grain / gallon) for most of the test, but water with less or greater hardness may be used for special purposes.

2. Synthetic dirt (see Table 1).

3. Paper towels.

4. test rods.

5. Control sticks.

Approach

Here's how:

-15L. the temperature is set at 35-38 ° C.

2. Spread 0.22 ml of dirt on the hand.

3. The hand is soaked.

4. The stick is rotated 3 times in both hands.

5. Add some water and rub hands 5 times.

6. Turn hands 3 times (without soap), step to instant volume.

7. Rotate 7 times more, final volume step.

8. Foam and sinks are collected.

9. Compare the volume to the standard target rod volume and determine the grade.

scale

Loaded with dirt

- Exceptional

- Much higher than the duty

- Higher than customs

- Target volume

- Slightly lower than the duty

- Lower than the duty

In vitro skin wall penetration test (softness)

This test is performed according to the procedure described in U.S. Pat. U.S. Patent No. 5,768,516; No. 4,812,253, Small et al., Issued Mar. 14, 1989.

Materials that contribute to improved processing often have adverse effects, especially when it comes to the fineness of the product. Referring to Table 2 and using the layer damage detection method to determine product fineness, cetaryl sulphate, as an individual raw material, exhibits a surprisingly greater fineness than the extremely fine cocoglyceryl ether sulfonate, as well as the shorter-chain AS, sodium dodecyl sulphate. The lower the number in Table 2, the milder the product.

Table 2

Mg transferred

Water

Sodium cetaryl sulfate Sodium coglyceryl ether sulfonate

0.13 7 0.302 0.458

-16Dodecyl sulphate 1,289

Sodium laurate 1,805

Synthetic stick production method Crutching

1. Place molten sodium cetra sulphate in a vertical axis mixer.

2. Add the specified amount of Hamposyl solution to the machine

L-30th

3. Add a specified amount of AGS paste to the machine water, which may be at room temperature or preheated to 65 ° C.

4. The stirrer and circulation pump are started and the temperature in the machine is maintained at 54-65 ° C by controlling the steam and water valves.

5. Allow the contents of the mixer to cool to 54 to 65 ° C before adding a predetermined amount of stearic acid.

6. Add a specified amount of soap or NaOH to the heated mixture in the mixer to form the soap in situ.

7. The contents of the mixer are allowed to stir or react for about 15 minutes while maintaining the temperature at 54-65 ° C.

8. Sodium chloride, as a plasticizer and titanium dioxide, is added to the heated mixture in the blender.

9. Add lauric or coconut fatty acid to the mixture and allow the contents of the machine to stir for about 15 minutes while maintaining the temperature at 54-65 ° C.

10. Add molten paraffin wax and mix for about an hour until uniform.

The stirred mixture is dried and cooled using a chamber and a cooling roller or belt. The stirred mixture is first heated to about 149 ° C with a heat exchanger and then dried by evaporation in a chamber over a cooling cylinder or our cooling one. From the evaporation chamber, the warm dried mixture is extruded onto a cooling roller or belt. A single, thin, cold (29-35 ° C) product in the form of flakes is obtained from the cooling roll or strip; or

-17- • ‘i ':

The flakes generally comprise 1 to 10% moisture, preferably about 2 to 4.5%. reducing the mixing temperature of the mixture in the heat exchanger.

The flakes are weighed and mixed in a metered amalgamator to obtain a uniform flakes size. A weighed amount of perfume is added to the flakes and mixed in the amalgator to form the final product with the desired perfume level. The perfume flakes are delivered to a hopper or directly to a screw press.

Grinding is carried out in a 3-roll soap mill, its first roller heated to 49 ° C and the second two rollers to about 7 ° C. The material is passed through the mill several times to obtain a homogeneous mixture of perfume and dry flakes.

The mixture is further pressed and embossed. The screw press is set to a jacket temperature of about 46 ° C and the head temperature is 45 to 50 ° C. An ideal screw press is a two-stage press allowing the use of a vacuum of about 15 to 25 inches Hg. The rods are cut into 5 inch sections and punched with a cold die using a liquor such as alcohol, if appropriate.

Examples

The following assemblies and examples are illustrative without limiting the scope of the invention. Methods for making knurled bars are well known. All amounts and ranges, temperatures, results and t <3. , as used herein, are intended to be approximate unless otherwise indicated. The rods of the invention in the present compositions (formulas) and examples have a pH of about 7 to 7.5.

The water level in the synthetic rods stabilizes at about 3.75% to 2-3% when stored.

Comparative Test Set A is a control bar for assessing the foaming or craziness of the bar of the invention. Comparative assembly A is usually an alkyl sulphate-based product as disclosed in U.S. Pat. patent patent no.

-1807/605 614, above. The assemblies described below have improved lubricity compared to Comparative Assembly A, without reducing workability. In some cases of Reports 1 to 7, the foam volume decreased. These kits are included to illustrate the scope of the invention. Acceptable degrees of lathering in dirt washing are 3.0 or greater.

Assembly 1 is characterized by improved craziness (lower numbers) after adding 21% paraffin wax compared to Comparative Assembly A. However, the bottom of Table 3. Assembly 1 to 3 present the surprising benefit that paraffin wax can impart to a synthetic rod containing a long chain alkyl sulphate. The assembly further represents that a paraffin wax with a higher melting point (69 ° C) than the wax used in assembly 1 provides an even better craziness, but without much detriment to the foaming effect of the paraffin with a lower melting point (59 ° C) at assembly 1. Assembly 1 comprises a mixture of two paraffins and has intermediate properties between assembly 1 and 2.

Table 3

Mass composition. % comparisons A 1 2 3

$ Sodium cetaryl sulphate 30.5 20.0 20.0 20.0 undersigned Sodium Lauroylsarcosinate 12.0 12.0 12.0 12.0 y Sodium cocoglyc erylether sulfonate 16.0 20.0 20.0 20.0 ú Sodium soap (in situ) 7.5 5.0 5.0 5.0 Λ y Stearic acid 13.0 8.7 8.7 8.7 Lauric acid 6.0 4.3 4.3 4.4 Paraffin (m.p. 59 ° C) - 21.0 - 6.0 ); Paraffin (m.p. 69 ° G) - - 21.0 15.0 PEG-150 10,0 4.0 4.0 4.0 s perfume 1.0 1.0 1.0 1.0 with Titanium dioxide 0.25 0.25 0.25 0.25 J Water 3.75 3.75 3.75 3.75

-19Technical data

Avg, foaming 4. 4 0.5 3.0 2.8 · Stubbornness, damp 4. 3 1.8 3.8 2.5 Stubbornness, dry 2 2 1.1 1.7 1.5 assembly, mass % component 4 5 6 ? Sodium cetaryl sulphate 20 0 20.0 20.0 19.0 Sodium Lauroylsarcosinate 12 0 12.0 12.0 13.0 glyceryl ether sulfonate sodium 24 0 20.0 24.0 24.0 Sodium soaps (in situ) 5 0 5.0 5.0 5.0 Stearic acid 8 7 4.3 4.3 4.3 Lauric acid 4. 3 8.7 8.7 8.7 Paraffin (m.p. 59 ° C) - - - - Paraffin (m.p. 69 ° C) 21 0 21.0 21.0 21.0 PEG-150 - 4.0 - - perfume 1 0 1.0. 1.0 1.0 Titanium dioxide 0 25 0.25 0.25 0.25 Water 3 75 3.75 3.75 3.75 Technical specifications Avg, foaming 3 0 3.0 3.5 4.0 Stubbornness, wet 3 3 3.1 2.3 3.2 Stubbornness, dry 6 1.5 1.3 1.8

Reports 4 through 6

Kits 4-6 illustrate the effects of co-emollients such as polyethylene glycol (PEG) on paraffin containing a long chain alkyl sulfate matrix. Assembly 4 has a lower (better) lubricity (3.3 / 1.6 vs. 3.8 / 1.7) than assembly 2, the difference being the presence of PEG in assembly 2. This improvement in lubricity is achieved without adversely affecting foam volume (3.0 / 3.0). Assemblies 5 and 6 differ in a similar manner: assembly 6 (without PEG) has better lubricity than assembly 5. Surprisingly, assembly 6 also has better foaming.

-20Report 7

Assembly 7 demonstrates that foaming can be further improved by increasing the level of high-foaming synthetic surfactants (kit 6 with 12% vs. kit 7 with 13%), such as sodium lauroyl sarcosinate, surprisingly, without significantly deteriorating the softness (kit 6 with 3, 5 compared to assembly 7 with a friability of 4.0 and assembly 6 with a lubricity of 2.3 and 1.3 compared to assembly 7 with a lubricity of 3.2 and 1.6).

Both assemblies 6 and 7 are very suitable for synthetic sticks / which have very good foaming and improved lubricity, while. are still well workable.

'EXAMPLE ⁹ Example 1'} j Example 1 is highly preferred personal cleansing TY1 rod of the invention. This is the same composition as in kit 6, except that sodium cocoyl isethionate (SCI) is used instead of cocoglyceryl ether sulfonate (AGS) and sodium.

| Examples 2 and 3

Example 2 is similar to Example 1 but uses 5%

In less cocoyl isethionate and 5% sodium isethionate is used.

Example 3 is similar to Example 1, but mixture d is used. lauric and coconut fatty acids, and less lauric acid is used.

s ^of Examples 1 to 3 maintains all the advantages of assembly 6, but replacing the AGS with SCI results in using a rod with a substantially better processability. In particular, the product is somewhat softer during the extrusion process, the flakes are more free-flowing, and the product (bar) is made; málinko lepkavý. These differences result in improved production. (processing) and improved personal cleansing bar.

-21Table 4

At example, no. materials. component 1 2 3 Sodium cetaryl sulphate 20.0 20.0 20.0 Sodium Laurcyl Sarcosinate 12.0 12.0 12.0 Sodium cocoylisethionate 24.0 19.0 24.0 Sodium isethionate - 5.0 - Sodium soap (in situ) 5.0 5.0 5.0 Stearic acid 4.3 4.3 4.3 Lauric acid in 8.7 8.7 3.7 Coconut fatty acid - - 3.0 Paraffin (m.p. 69 ° C) 21.0 21.0 21.0 perfume 1.0 1.0 1.0 Titanium dioxide 0.25 0.25 0.25 Water 3.75 3.75 3.75 Technical data Avg, foaming 3.3 ON THE ON THE Stubbornness, wet 3.2 ON THE ON THE Mush 1.9 ON THE ON THE

Claims (9)

PATENT CLAIMS What is claimed is: 1. A personal cleansing bar comprising 10 to 40% of a substantially saturated long chain C, C1-4 alkyl sulphate; 10 to 40% paraffin wax having a p-1-2 of 2 2; 15 to 40% of a slightly foaming synthetic surface active agent selected from the group consisting of C ₂ _i4isetionát, C - ^ - ^ alkyl glyceryl ether sulfonate, sodium lauroyl sarcosinate, and mixtures thereof; 8 to 25% free fatty acid; 2 to 15% of soap and 1.5 to 10% of water, wherein at least 10% of the rod forms a slightly foaming c ₂ _ ^^ alkylisetionát. 2. A personal cleansing bar comprising 15 to 35% saturated long chain alkyl sulphate; 3 to 12% soap; 18 to 35% foaming mild surfactant; 13 to 35% paraffin wax with a pulse lottery point of 60-74 ° C and 2-8% water, with the lauric acid and stearic acid 6-18 ^ ^^ ^ ^a - ^N ® is a fatty acid in a ratio of 2.5: 1 to 1: 2 and said free fatty acids are present in an amount of 10 to 20% and said bar has a pH of 4.0 to 9. 3. The personal cleansing bar, characterized in that it comprises 10 to 40% substantially saturated long chain ^^ ^ ³ 15-22 ¹⁾ synthetic surfactant selected from the group consisting of alkyl sulfate, acylisetionát, alkyl sarcosines, alkyl glyceryl ether sulfonate, and mixtures thereof; 10 to 40% paraffin wax, mp 54-82 ° C; 15 to 40% foaming mild synthetic surfactant active agent selected from the group consisting of ^C] _2-l4 ^isethionate 'C12_ ₁₄ alkyl glyceryl ether sulfonate, sodium lauroyl sarcosinate, and mixtures thereof, wherein at least 10% of the rod forms a slightly foamy C ₁₂ _i alkylisetionát, 8 to 25% of free fatty acid; 2 to 15% soap and 1.5 to 10% water. A stick according to claim 1, 2 or 3, characterized in that said wax has a melting point of 60 to 60 ° C 7.4 ° C, preferably 61 to 71 ° C. A bar according to claim 1, 3 or 4, characterized in that it comprises 10 to 20% free fatty acid, preferably a ratio of 3: 1 to 1: 3. and stearic acid at po-236. The rod of claim 5 wherein the ratio of lauric acid to stearic acid is 2.5: 1 to 1; 2. A stick according to claim 1, 2, 3, 4 or 5, characterized in that the foaming mild synthetic surfactant is selected from sodium C 1-4 alkyliglyceryl ether sulphonate and sodium lauroyl sarcosinate and mixtures thereof. Bar according to claim 7, characterized in that the ratio of C 1-6 alkyl isethionate to sodium lauroyl sarcosinate is 1: 1 to 3: 1, preferably 1.5: 1 to 2.5: 1. Bar according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that the melting point of the wax is 61 to 71 ° C, the water content is 2 to 4% and the pH is 6.5 to 7.5, wherein the long chain synthetic surfactant is a mixture of C 18-18 alkyl sulphate and C 18-18 acyl isethionate. A stick according to claim 9, characterized in that it contains 10 to 20% free fatty acid with a long chain synthetic surfactant being predominantly C ₁₆ acyl isethionate.