FI90199C - in shampoo - Google Patents

Description

1 90199

in shampoo

The present invention relates to mild, highly cleansing therapeutic shampoos containing a dispersed non-volatile silicone phase and stabilizing 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. The accumulation of sebum causes a dirty feeling in the hair and an unpleasant appearance. Contamination of the hair makes it necessary to wash it regularly.

Washing your hair with shampoo cleanses by removing excess dirt and sebum. However, the disadvantages of shampoo treatment are the division of the hair into a brandy, messy and generally stubborn state. Various approaches have been developed to alleviate the jagged problems of shampooing. N3ita is 20 s.o., from the addition of hair care adjuvants to the shampoo to the application of the hair care agents after shampooing. hiustenhuuhteluaineisiin. Hair rinses typically act by precipitating a polymer film or other material on the hair. However, such solutions to a very prevailing problem have not been entirely satisfactory. First, the hair conditioners must be applied to the shampoo in a separate step, left on the hair for a while and rinsed with fresh liquid. Of course, this is time consuming and not nice.

Although shampoos containing hair conditioners have been described, they have not been entirely satisfactory for a variety of reasons. One problem relates to the silent compatibility problems between highly cleansing anionic surfactants and cationic fats good as therapeutic agents. This prompted workers in the field to study other surfactants such as nonionic, amphoteric and zwitterionic. Many women 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 to Sato.

5 Use of other surfactants

solved many compatibility issues but 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 provide increased softness include silicones, both those that are soluble in the shampoo matrix and those that are insoluble therein.

Silicones of 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.

The Eras approach, which has been shown to be advantageous in suspending the Saxon 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 steadily noticed that a certain combination of surfactant alkyl sulfate and alkyl sulfate can be used to form milder and yet more foaming shampoos than the alkyl sulfate system alone.

It is 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 silicone shampoo compositions using anionic surfactants which foam well while being milder than shampoos obtained using the alkyl-10 sulfate system alone surfactant.

It is a further object of the present invention to provide highly cleansing, mild, caring 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 1 to 8 moles of ethylene oxide sulfuric acid ester of the reaction product of the silent reaction; 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 silent 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 given in the following paragraphs.

90199 4

Active substance

An essential component of the present assemblages is the 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 10 to about 6: 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 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) to form 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 has a sitd of 30 ldsnd at a level of about 0.01% to about 10%, preferably about 0.5% to about 3%. Mixtures of these liquids can be used and are preferred in some embodiments. The dispersed silicone particles should have myOs insoluble in the shampoo matrix. By tdtd is meant the term "insoluble" as used above.

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 disclosed in Dow Corning Corporate Test Method CTM0004, July 20, 1970. Preferably, the viscosity is about 350 to 100,000. mm 2 / s.

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 under the name SF 1075 methylphenyl liquid or from Dow Corning under the name 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 can also 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 to Drakoff; U.S. Patent 4,364,837 to Pader and British Patent 849,433 to Woolston. All such patents are incorporated herein by reference. The MyOsk reference includes 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. Silicone-35 rubbers are described by Petrarch et al., Including U.S. Pat. and Noll, Walter, Chemistry and Technology of Silicones, New York; Academic Press 1968. MyOsk silicone rubbers are described in General Electric Silicone Rubber Product Data 5 Sheets SE 30, SE 33, SE 54 and SE 76. All references described ndma 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 The suspending agent useful in the present compositions may be any of a number of long chain acyl derivatives 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, as well as 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 are 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 work and no additional suspending agent may be required if the level of those materials is below the minimum level given.

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 component of the present invention and forms the remainder of the composition. It is generally present at a level of from about 20% to about 95%, preferably from about 60% to about 85%.

Optional ingredients

Shampoos herein may contain a number of episolonial, optional components that are more suitable for making such compositions. 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 from BASF Wyandotte, polyol alcohol alcohol, sodium sulphonate, sodium chloride, sodium chloride, sodium chloride pH-sensing agents such as citric acid, succinic acid, phosphoric acid, sodium hydroxide, sodium carbonate, etc .; hajus-YOU; colors; and complexing agents such as disodium methylenediamine tetraacetate. Such agents are generally used individually at a level of from about 0.01% to about 5%, preferably from 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 the 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 at any weight (molar weight) up to the molar weight of the alkyl sulfate / ethoxylated alkyl sulfate mixture.

Yet another optional component of the present invention is an anti-dandruff agent. Suitable materials include sulfur, selenium sulfide, salicylic acid, zinc pyridinione, other 1-hydroxypyridones, such as those disclosed in U.S. Pat. 4,185,106, January 22, 1980, 25 Dittmar et al., Which is incorporated herein by reference, and the fungicidal azoles described in British Pat. 1,502,144, issued February 22, 1978, which is incorporated herein by reference, among many others. The anti-scale agent is present at a level of about 0.2% to about 4%.

Zinc pyridinium 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 a flake of 0.20 and about 0.65, and an average particle diameter of about 2. as the diameter of a sphere of equivalent volume. It is preferred that the median particle diameter not exceed about 15 μπι expressed on the same basis.

The diameter of the particle of equivalent particle volume, dv, can be determined by various sedimentation procedures based on Stokes' law on the settling rate 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, incorporated herein by reference.

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

Fochtman on page 113 as follows: "fe) 'where dv is the diameter of a sphere of equivalent volume, over 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 in this is the average sphericity, the mean values 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 monocarboxylic fatty acids. - 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 a heat exchanger 1Mpi to cool it to below 35 ° C. The rest of the composition is added at this time and the total composition is mixed.

A large section mill will be used to achieve proper dispersion of the silicone fluid used. This is achieved by keeping the average particle size of the silicones at about 10 μm or less.

The present compositions are used in a conventional manner to cleanse the hair. About 0.1 g to about 10 g of the composition is applied to hair that has been moistened, usually with liquid, 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 given for illustrative purposes only and should not be construed as limitations of the present invention, as many variations thereof are possible without departing from the spirit and scope thereof.

J; 11 9 η 1 99

Examples I to VII

The following are compositions representative of the present invention.

Palno-%

5 Component_I II 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 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 supernatant, viscosity, ... q 25 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 compositions shown above are both mild and foamy.

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 90199 12 tia tal TEA lauryl sulfate can be used instead of anunonium lauryl sulfate. In addition, other silicones, such as lower or higher viscosity silicones, may be used in place of the material shown.

l!

Claims (6)

9 019 2 Shampoo composition, characterized in that it contains 5 a) a mixture of 10 to 40% by weight 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 -8 moles of ethylene oxide sulfuric acid ester of the reaction product of the reaction; 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, long-chain esters of long-chain fatty acids, long-chain glycols 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 additionally contains an isethionate salt of the active ingredient. 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