FI90199B - in shampoo - Google Patents

Description

1 90199

in shampoo

The present invention relates to mild, highly cleansing conditioning shampoos containing a dispersed non-volatile silicone phase and stabilized using certain long chain materials.

Human hair is polluted by the contact with the surrounding atmosphere and for the most part by the sebum excreted by the head. Accumulation of sebum 10 causes a dirty feeling and an unpleasant appearance of the hair. Contamination of the hair makes it necessary to wash them regularly.

Washing your hair with shampoo cleanses by removing excess dirt and sebum. However, the disadvantages of shampoo treatment are that the hair is left in a wet, messy and generally stubborn state. Various approaches have been developed to alleviate the problems after shampooing. These are 20 s.o. hiustenhuuhteluaineisiin. Hair rinses typically work by mixing a polymeric film or other material on the hair. However, such solutions to a very prevalent problem have not been entirely satisfactory. First, the hair rinses must be applied at a separate stage after shampooing, left on the hair for a while and rinsed with fresh water. This is, of course, time consuming and not comfortable.

Although shampoos containing hair conditioners have been described, they have not been entirely satisfactory for a variety of reasons. One problem relates to compatibility problems between highly cleansing anionic surfactants and good cationic fats as therapeutic agents. This prompted those skilled in the art to investigate other surfactants such as nonionic, amphoteric, and zwitterionic. Many of these companies are reflected in 2,90199 patents issued in the treatment shampoo industry. See, e.g., U.S. Patent 3,849,348, issued November 19, 1974 to Hewitt; U.S. Patent 3,990,991, issued November 9, 1961 to Gerstein; and U.S. Patent 3,822,312, issued July 2, 1974, Sato.

5 The use of these other surfactants solved many compatibility problems, but still did not produce complete answers in all areas. For example, cationic conditioners may not provide the level of softness desired by users. Substances that can produce increased softness are silicones, both those that are soluble in the shampoo matrix and those that are insoluble therein.

Silicones in shampoo compositions have been described in numerous different publications. Such publications include U.S. Patent 2,826,551, issued March 11, 1958, to Geen; U.S. Patent 3,964,500, issued June 22, 1976, Drakoff; U.S. Patent 4,364,837, issued December 21, 1982, to Pader; and British Patent 849,433, issued September 28, 1960, Woolston. Although these patents explain silicone-containing compositions, they do not provide answers to all of the problems encountered in making a completely satisfactory product. One problem is keeping the dispersed, non-slip silicone material suspended and the overall product stable. Another problem relates to the softening of highly cleansing shampoos based on anionic surface ac-25 seals.

One approach that has proven beneficial in suspending the silicone material involves the use of long chain acyl derivatives and other long chain derivatives. Such an approach is explained in European Patent Application 0 181 773, published May 21, 1986, which is incorporated herein by reference.

The present inventors have surprisingly found that by using a certain combination of surfactant alkyl sulfate and alkyl sulfate, milder and yet highly foaming shampoos can be formed than by using an alkyl sulfate system alone.

It is therefore an object of the present invention to provide a stable silicone-containing treatment shampoo.

It is a further object of the present invention to provide anionic surfactants using silicone shampoo compositions which foam well while being milder than shampoos obtained using an alkyl-10 sulphate surfactant system alone.

It is a further object of the present invention to provide highly cleansing, mild, curative anti-dandruff toothpicks.

These and other objects will be readily apparent from the following 15 detailed descriptions.

Unless otherwise indicated, all percentages and ratios herein are by weight.

The present invention relates to shampoo compositions comprising 20 a) 10 to 40% by weight of a mixture of ethoxylated C8-C18 alkyl sulphate and C8-C18 alkyl sulphate, wherein the ethoxylated alkyl sulphate is one mole of C8-C18 alcohol and Sulfuric acid ester of the reaction product of the reaction between 1 to 8 moles of ethylene oxide; B) 0.01 to 10% by weight of dispersed, insoluble, non-volatile silicone; c) 0.5 to 5% by weight of a suspending agent selected from the group consisting of long chain C16-C22 acyl derivatives and mixtures thereof; and 30 d) water; wherein the molar ratio of ethoxylated alkyl sulfate to alkyl sulfate is 3: 2 to 6: 1, preferably 2.5: 1 to 3.5: 1. These as well as optional components are described in detail below.

The essential components of the present invention are set forth in the following paragraphs.

90199 4

Active substance

An essential component of the present compositions is a combination of surfactants. The mixture of surfactants is present at a level of from about 10% to about 40%, preferably from about 10% to about 30%, most preferably from about 15% to about 22%.

The surfactants used in the present compositions are ethoxylated alkyl sulfates and alkyl sulfates in a molar weight ratio of the former to about 3: 2 to about 6: 1, preferably about 2.5: 1 to about 3.5: 1.

The ethoxylated alkyl sulfates are preferably one mole of higher alcohols (e.g., 8 to 18 carbon atoms, linear as well as branched) and 1 to 8 moles of ethylene oxide are the sodium, potassium, or triethanolamine salts of the sulfuric acid esters of the reaction product.

Examples of alkyl sulfates are those prepared by sulfating higher fatty alcohols (8-18 carbon atoms) and forming a sodium, potassium, ammonium or triethanolamine salt.

·. *. Particularly preferred alkyl sulfates and ethoxylated alkyl sulfates are ammonium lauryl sulfate and ammonium lauryl-3-sulfate.

Non-Volatile Silicone Fluid 25 Silicone fluids are suitable non-volatile silicone that can be used in the present compositions.

The non-volatile silicone fluid may be either a polyalkylsiloxane, a polyarylsiloxane, a polyalkylarylsiloxane or a polyethersiloxane copolymer and is present at a level of about 0.01% to about 10%, preferably about 0.5% to about 3%. Mixtures of these liquids may also be used and are preferred in some embodiments. The dispersed silicone particles should also be insoluble in the shampoo matrix. This is meant by the term 35 "insoluble" as used above and below.

5,901 59

Substantially non-volatile polyalkylsiloxane fluids that can be used include, for example, polydimethylsiloxanes having a viscosity of about 5 to 600,000 mm 2 / s at 25 ° C. These siloxanes are available, for example, from General Electric Company under the name Viscasil and from Dow Corning under the name Dow Corning 200. Viscosity can be measured with a glass capillary viscometer as described in Dow Corning Corporate Test Method CTM0004, July 20, 1970. Preferably, the viscosity is about 350 to 100,000 mm2 / p.

Essential non-volatile polyalkylarylsiloxane fluids that can be used include, for example, polymethylphenylsiloxanes having a viscosity of about 15 to 30,000 mm 2 / s at 25 ° C. These siloxanes are available, for example, from General Electric Company as SF 1075 methylphenyl liquid or from Dow Corning as 556 Cosmetic Grade Fluid.

The substantially non-volatile polyether siloxane copolymer that can be used is, for example, polypropylene oxide-modified dimethyl polysiloxane (e.g., Dow Corning DC-1248), although ethylene oxide or mixtures of ethylene oxide and propylene oxide may be used.

References describing suitable silicone fluids include the aforementioned U.S. Patent 25,282,551, Gene; U.S. Patent 3,964,500, issued June 22, 1976, Drakoff; U.S. Patent 4,364,837 to Pader and British Patent 849,433 to Woolston. All of these patents are incorporated herein by reference. Also referenced herein is Silicon Compounds, distributed by Petrarch Systems, Inc., 30 1984. This reference provides a very good list of suitable silicone materials.

Another silicone material that has been found to be particularly useful in the present compositions to produce a good dry hairstyle is silicone rubber. Silico-35 rubbers are described by Petrarch et al., Including U.S. Patent No. 9,011,996 Exam 4,152,416, issued May 1, 1979 to Spitzer, et al. and Noll, Walter, Chemistry and Technology of Silicones, New York; Academic Press 1968. Silicone rubbers are also described in General Electric Silicone Rubber Product Data 5 Sheets SE 30, SE 33, SE 54 and SE 76. All of these references are incorporated herein by reference. "Silicone rubber" materials are high molecular weight polydiorganosiloxanes having a molecular weight of from about 200,000 to about 1,000,000. Specific examples include polydimethyl-10 siloxane, (polydimethylsiloxane) (methyl vinylsiloxane) (copolymer), methyl vinyl siloxane ) (methyl vinylsiloxane) copolymer and mixtures thereof.

Long Chain Derivative Suspending Agent 15 The suspending agent useful in the present compositions may be any of a number of long chain acyl derivative agents or mixtures of such agents. Included are ethylene glycol esters of fatty acids having from about 16 to about 22 carbon atoms. Preferred are ethylene glycol stearates, both mono- and di-stearate, but especially distearate containing less than 7% monostearate. Other suspending agents found to be useful include alkanolamides of fatty acids having from about 16 to about 22, preferably from about 16 to about 18 carbon atoms. Preferred alkanolamides are stearic monoethanolamide, stearic diethanolamide, stearic monoisopropanolamide and stearic monoethanolamide stearate. Other long chain acyl derivatives include long chain esters of long chain fatty acids (e.g., stearyl stearate, cetyl palmitate, etc.); glyceryl esters (e.g. glyceryl distearate) and long chain esters of long chain alkanolamides (e.g. stearamide DEA distearate).

Still other suitable suspending agents include alkyl (C16-22) dimethylamine oxides such as stearyldimethyl. 90199 7 amine oxide. If the compositions contain an amine oxide or a long chain acyl derivative as a surfactant, the suspending function could also function and no additional suspending agent may be required if the level of those materials is at least below a given minimum level.

The suspending agent is present at a level of about 0.50% to about 5.0%, preferably about 0.5% to about 3.0%. The suspending agent acts to help suspend the silicone material and can give the product a pearlescent shine. Mixtures of suspending agents are also suitable for use in the compositions of this invention.

Water

Water is the last essential ingredient of the present invention and forms the rest of the composition. It is generally present at a level of about 20% to about 95%, preferably about 60% to about 85%.

Optional ingredients

Shampoos herein may contain a number of non-essential, optional components suitable for making such compositions more acceptable. Such conventional optional ingredients are well known to those skilled in the art, e.g., preservatives such as benzyl alcohol, methyl paraben, propyl paraben and imidazolidinyl urea; cationic surfactants such as cetyltrimethylammonium chloride, lauryltrimethylammonium chloride, trisethylmethylammonium chloride, stearyldimethylbenzylammonium chloride and di (partially hydrogenated tallow) dimethylammonium chloride; thickeners and viscosity modifiers such as long chain ras-waxic acid diethanolamide (e.g. PEG 3 lauramide), group polymers of ethylene oxide and propylene oxide such as Pluronic F88 provided by BASF Wyandotte, polyol alcohol alcohol, sodium sulphonate, sodium chloride, sodium chloride, sodium chloride, pH adjusting agents such as citric acid, succinic acid, phosphoric acid, sodium hydroxide, sodium carbonate, etc .; fragrances; colors; and complexing agents such as disodium methylenediamine tetraacetate. Such agents are generally used individually at a level of about 0.01% to about 5%, preferably about 0.5% to about 5.0% by weight of the composition.

The second optional component is another surfactant used in combination with an alkyl sulfate / ethoxylated alkyl sulfate mixture. Sodium alkyl glyceryl ether sulfonates are included in Va-10 optional surfactants; a reaction product obtained by esterifying fatty acids having 10 to 22 carbon atoms with isethionic acid and neutralizing with sodium hydroxide; water-soluble salts of fatty acids and sarcosine condensation products; among several others. Optional surfactants can be used collectively in any amount (molar amount) up to the molar amount of the alkyl sulfate / ethoxylated alkyl sulfate mixture.

Yet another optional component of the present invention is an anti-dandruff agent. Suitable agents include sulfur, selenium sulfide, salicylic acid, zinc pyridinione, other 1-hydroxypyridones such as those disclosed in U.S. Pat. No. 4,185,106, January 22, 1980, 25 Dittmar et al., Incorporated herein by reference, and the fungicidal azoles described in British Patent No. 4,185. 1,502,144, issued February 22, 1978, which is incorporated herein by reference, among many others. The anti-dandruff agent is present at a level of about 0.2% to about 4%.

Zinc pyridine ion is a preferred substance, especially when its salt crystals are predominantly flat flakes having an average sphericity of less than about 0.65, preferably between 0.20 and about 0.65, and an average particle diameter of at least about 2 μm, expressed as 35 equivalents of spherical volume. diameter. It is preferred that the median particle diameter is not greater than about 15 μm, expressed on the same basis.

The diameter, dv, of a particle with an equivalent volume of particle can be determined by various sedimentation-5 procedures based on Stokes' law for the rate of settling of particles in a liquid. Such procedures are described by Stockham, J.D. and Fochtman, E.G., in "Particle Size Analysis," Ann Arbor Science, 1978, which is incorporated herein by reference.

10 The sphericity of a particle is also described by Stockham and

Fochtman on page 113 reads as follows: * - (M! Where dv is the diameter of a sphere of equivalent volume, above and d „is the diameter of a sphere of equivalent sphere -20 and. The procedure for determining ds is the BET procedure described by Stockham and Fochtman on page 122. .

Since the interesting sphericity here is the average sphericity, the averages of the diameters are used.

Other optional components include other suspending agents such as xanthan gum at a level of about 0.2% to about 5% and shorter chain amides such as mono- to mono- to fatty acids having from about 8 to about 14 carbon atoms. - diethanolamides commonly used in shampoos.

Preferred are coconut monoethanolamide, laurediethanolamide and mixtures thereof at a level of about 1% to about 5%.

The pH of the present composition is not critical and may range from 2 to about 10.

The shampoos of the present invention can be prepared by mixing a portion of a mixture of surfactants, a suspending agent and silicone and heating to about 10 90199 72 ° C. The mixture is stirred thoroughly for about 10 minutes at 72 ° C before being pumped through a large section mill and then through a heat exchanger to cool it to below 35 ° C. The rest of the composition is added at this time and the total composition is mixed.

A high shear mill is used to achieve proper dispersion of the silicone fluid. This is accomplished by keeping the average particle size of the silicones at about 10 μm or less.

The present compositions are used in a conventional manner for cleansing the hair. About 0.1 g to about 10 g of the composition is applied to hair that has been moistened, usually with water, worked through the hair and then rinsed off.

The following examples further illustrate and illustrate preferred embodiments within the scope of the present invention. The examples are provided for illustrative purposes only and are not to be construed as limitations of the present invention, as many variations thereof are possible without departing from the spirit and scope thereof.

J; 9 n 1 99 11

Examples I to VII

The following are compositions representative of the present invention.

Weight-%

5 Component_I 11 III IV V VI VII

Water qs to 100%

Ammonium laureth-3-sulphate (28%) 50.5 50.5 38.6 50.5 50.5 25.2 41.6

Ammonium lauryl sulphate (25%) 12.6 12.6 9.6 25.2 6.3 12.6 10.4

Cocomide MEA 3.0 3.0 3.0 4.0 3.0 2.0 2.0

Glycol distearate 3.0 3.0 3.0 2.0 4.0 5.0 3.0

Dimethicone1 2 3 4 5 1.0 1.0 1.0 0.5 1.5 2.5 1.0 15 Sodium cocoyl isethionate (85%) -4.7-9.4

Zinc pyrithione (25%) - 4.0 4.0 - 4.0

Sodium coconut glycol-20 seryl ether sulphonate (50%) - - - - - - 6,0 Color, preservative, pH adjuster, viscosity regulator, other ... qs qs qs qs qs qs qs qs pH, ± 0, 2 5.5 6.0 6.5 7.5 7.0 4.5 6.0 AES / AS ratio 3: 1 3: 1 3: 1 3: 2 6: 1 3: 2 3: 1

The viscosity of dimethicone is 106 mPas.

2. : 30 3

The above compositions are both mild and foam well.

4

In the above compositions, other surfactants such as sodium myret-3-sulfate or TEA-35 lauret-2-sulfate may be used in place of ammonium laureth-3-sulfate. Similarly, sodium myristyl sulfate or TEA lauryl sulfate can be used instead of ammonium lauryl sulfate. In addition, other silicones, such as lower or higher viscosity silicones, may be used in place of the disclosed material.

l!

Claims (6)

9 019 2 Shampoo composition, characterized in that it contains 5 a) 10 to 40% by weight of a mixture of ethoxylated C8-C18 alkyl sulphate and C8-C18 alkyl sulphate, wherein the ethoxylated alkyl sulphate is one mole of C8-C18 alcohol and 1 Sulfuric acid ester of the reaction product of the reaction between -8 moles of ethylene oxide; B) 0.01 to 10% by weight of dispersed, insoluble, non-volatile silicone; c) 0.5 to 5% by weight of a suspending agent selected from the group consisting of long chain C16-C22 acyl derivatives and mixtures thereof; and 15 d) water; wherein the molar ratio of ethoxylated alkyl sulfate to alkyl sulfate is 3: 2 to 6: 1. Shampoo composition according to Claim 1, characterized in that the long-chain acyl derivative is selected from the group consisting of long-chain ethylene glycol esters, alkanolamides of long-chain fatty acids, long-chain esters of long-chain fatty acids and long-chain glyceryl esters of long-chain fatty acids. alloys. Shampoo composition according to Claim 1 or 2, characterized in that the non-volatile silicone is chosen from the group consisting of polydimethylsiloxanes having a viscosity of 5 to 100,000 mm 2 / s at 25 ° C, polypropylene oxide-modified dimethylsiloxanes, silicone rubbers and mixtures thereof. Shampoo composition according to one of Claims 1 to 3, characterized in that it additionally contains a mono- or diethanolamide of a fatty acid having 8 to 14 carbon atoms. 14,901 99 Shampoo composition according to one of Claims 1 to 4, characterized in that it further contains an isethionate salt. Shampoo composition according to one of Claims 1 to 5, characterized in that the long-chain acyl derivative is a long-chain ethylene glycol ester. i is 90199