Solid surfactant composition

Abstract

The present invention relates to a solid surfactant composition comprising an anionic carboxylic acid ester of a C8-C20 alkyl polyglycoside and a C8-C22 N-acylamino acid, which can be readily formulated as a self-thickening rinse-off formulation and has excellent foaming properties, and to personal care formulations containing said solid surfactant compositions.

Description

Technical Field

[0001] The present invention relates to a solid surfactant composition comprising C 8 -C 20 Anionic esters of alkyl polyglycosides and C 8 -C 22 N-acyl amino acids, and personal care formulations containing the solid surfactant compositions. Background Art

[0002] Given the recent focus on environmental protection and the desire of consumers and conscious companies to protect the planet, the need for personal care products (including consumer goods) to reduce the environmental footprint is being strongly driven. Traditional personal care rinse-off compositions (such as shampoo and shower gel) usually contain water as the main ingredient of the formulation. This leads to the need for large plastic packaging and increases costs and CO during transportation. 2 Emissions. Traditionally, the personal care market has relied almost entirely on plastic packaging, which is rarely or difficult to recycle, as paper-based or biodegradable materials are not fully suitable for water-based compositions or liquid-based cosmetics. Therefore, in addition to the formulation of personal care products, packaging also provides another opportunity to reduce the environmental footprint of products.

[0003] To achieve this goal, efforts are underway to develop and market personal care products in concentrated or, in particular, solid forms, offering products with less or no water. Solid, low-water content or anhydrous personal care products can be delivered in sustainable and recyclable packaging. They are typically more concentrated and a fraction of the volume of liquid products, minimizing packaging, making them lighter and easier to transport, and therefore generating lower emissions.

[0004] However, formulations with low water content are challenging because they need to maintain all the properties that consumers demand: ease of use, rich lather, mildness, and comfort for hair and skin. Therefore, new sustainable solid ingredients are essential to provide safe, effective, and water-saving personal care products.

[0005] Sustainable alkyl polyglycoside (APG)-based surfactants have long been known and favored. Even the anionic esters of alkyl polyglycosides, such as APG sulfosuccinate, APG tartrate and APG citrate, have been widely recognized. In particular, APG anionic esters without sulfate or sulfonate groups (such as APG tartrate and APG citrate) are favored in the personal care field due to their mildness to hair, skin and mucous membranes.

[0006] However, APG surfactants and their derivatives are mainly provided in aqueous solutions, which are difficult or even almost impossible to dry and provide in solid form.

[0007] Surprisingly, it has been found that C 8 -C 20 Anionic carboxylates of alkyl polyglycosides and C 8 -C 18 The surfactant mixture of acylamino acids is easy to dry and can be provided in the form of solid compositions, such as powders, granules, tablets or pellets. These surfactant compositions dissolve rapidly in water and can be used to prepare solid and concentrated personal care formulations. In addition, both ingredients are bio-based materials with excellent surface properties, low potential toxicity and low environmental impact.

[0008] To the best of the applicant's knowledge, the solid surfactant composition of the present invention has never been described.

[0009] WO 2021 / 087492 describes a substantially anhydrous, concentrated surfactant composition comprising a sugar-based surfactant, such as an alkyl polyglycoside citrate / salt; an amino acid-based surfactant; a polyglycerol ester or polyhydroxy ether, or a combination of a polyglycerol ester and a polyhydroxy ether; and an optional glycol. However, according to WO 2021 / 087492, a carrier is generally required to help dissolve the composition, so the amount of glycol included in the surfactant composition is about 10% by weight to less than 40% by weight. Solid surfactant compositions are neither described nor suggested. Only liquid surfactant compositions are taken as an example. Summary of the invention

[0010] The present invention therefore relates to a solid surfactant composition comprising: a) 10 to 45% by weight of C 8 -C 20 anionic carboxylate of an alkyl polyglycoside and b) 20 to 75% by weight of C 8 -C 22 N-acylamino acid salts, wherein the sum of a) and b) constitutes at least 50% by weight, preferably at least 65% by weight of the composition.

[0011] Another object of the present invention is a personal care formulation comprising from 0.5 to 70% by weight of said solid surfactant composition. DETAILED DESCRIPTION

[0012] As used herein and commonly used in the art, the term "solid" applies to substances having constant volume and shape under normal conditions, which means that the physical state of the surfactant composition at a temperature of 20°C and a pressure of 1 atmosphere is solid.

[0013] The solid surfactant composition may be in the form of a powder, granules, tablets, sticks or pellets. Preferably, the composition is in the form of a powder or granules. More preferably, it is in the form of a powder.

[0014] The term "powder" refers to a composition in powdered form with a particle size between 0.1 μm and 3 mm, preferably between 0.3 μm and 1 mm.

[0015] The term "particles" refers to small pieces of objects of various shapes and sizes formed by the aggregation of solid particles. They can be regular or irregular in shape. Specifically, they can be spherical or square, rectangular or elongated (such as small rods). Spherical particles are most preferred.

[0016] The solid surfactant composition may be in the form of tablets, sticks or granules, obtainable, for example, by manual or mechanical compression or by extrusion.

[0017] The solid surfactant composition of the present invention comprises 10 to 45 wt %, preferably 15 to 40 wt %, more preferably 20 to 40 wt % of anionic carboxylate of alkyl polyglycoside.

[0018] The anionic carboxylate of the alkyl polyglycoside can be represented by formula (I):

[0019] [RO-(G) x ] n -(D) y (I)

[0020] in:

[0021] R is a saturated or unsaturated, linear or branched moiety having 6 to 20 carbon atoms, preferably 8 to 14 carbon atoms.

[0022] Aliphatic alkyl groups of carbon atoms;

[0023] G is a reducing sugar residue, preferably glucose, which is linked to RO via an ether O-glycosidic bond;

[0024] O is an oxygen atom;

[0025] D is an acyl residue of a carboxylic acid selected from the group consisting of citric acid, tartaric acid, maleic acid, malic acid, sulfosuccinic acid, and mixtures thereof, in acid or salt form;

[0026] n is a number between 1 and m-1, where m is the number of carboxyl groups in the acid derived from D;

[0027] x is a number between 1 and 5, which represents the average degree of polymerization of G;

[0028] y is a number between 1 and 5, which represents the average degree of esterification.

[0029] The anionic esters of the above-mentioned alkyl polyglycosides of the formula (I) are known and can be prepared, for example, according to the methods described in EP 258814 or EP 510 564.

[0030] In a preferred embodiment, the anionic ester of the alkyl polyglycoside is synthesized from an alkyl polyglycoside containing an alkyl group of 8 to 14 carbon atoms and an average degree of polymerization x of between 1.0 and 2.5.

[0031] Preferably, in formula (I), D is an acyl residue of a carboxylic acid selected from the group consisting of citric acid, tartaric acid and mixtures thereof.

[0032] When R in the anionic ester of the alkyl polyglycoside of formula (I) is an alkyl group having 8 to 14 carbon atoms, the average degree of polymerization x is between 1.0 and 2.5, and D is an acyl residue of citric acid (C 8 -C 14 The best results were given when the

[0033] The solid surfactant composition of the present invention comprises 20 to 75 wt %, more preferably 30 to 70 wt %, more preferably 35 to 70 wt % of C 8 -C 22 N-acylamino acid salts.

[0034] The type of amino acid used to produce the salt is not particularly limited. Examples include glutamic acid, glycine, alanine, phenylalanine, sarcosine, tyrosine, threonine, aspartic acid, etc. As acyl, for example, a saturated or unsaturated, straight-chain or branched fatty acyl group having 8 to 22 carbon atoms, preferably 8 to 18 carbon atoms, can be used. Examples of acyl include 2-ethylhexanoyl, capryloyl, caproyl, lauroyl, myristoyl, stearoyl, isostearyl, oleoyl, behenoyl, coconut oil acyl, palmitoyl, etc.

[0035] A mixture of two or more N-acyl amino acids having acyl groups of different chain lengths may be used to prepare the surfactant composition of the present invention.

[0036] C 8 -C 22 The type of the salt of N-acylamino acid is not particularly limited. The salt can be selected from those commonly used in the art. Examples include alkali metal salts (e.g., sodium salts and potassium salts), alkaline earth metal salts (e.g., calcium salts and magnesium salts), ammonium salts, organic amine salts (e.g., monoethanolamine salts, diethanolamine salts and triethanolamine salts), basic amino acid salts (e.g., arginine salts and lysine salts). Alkali metal salts and ammonium salts are preferred, with sodium salts being most preferred.

[0037] C suitable for implementing the present invention 8 -C22 Specific examples of the N-acylamino acid salts are sodium, ammonium or potassium salts of N-lauroyl sarcosinate, N-cocoyl sarcosinate, N-lauroyl glutamate, N-cocoyl glutamate, N-myristoyl glutamate, N-lauroyl alaninate, N-cocoyl alaninate, N-myristoyl alaninate, N-lauroyl glycinate, N-cocoyl glycinate, N-myristoyl glycinate and mixtures thereof.

[0038] C 8 -C 22 N-acyl glutamate and glycinate are preferred amino acid-based surfactants for preparing the solid surfactant composition of the present invention. 8 -C 18 Acylglutamate.

[0039] The solid surfactant composition of the present invention may also contain 3 to 25% by weight, preferably 5 to 20% by weight, of an alkyl polyglycoside. Suitable alkyl polyglycosides have formula II:

[0040] RO-(G) x II

[0041] Wherein, R, O, G and x have the same meanings as those reported in Formula I above.

[0042] The solid surfactant composition in powder form can be prepared starting from the composition in aqueous solution by solvent evaporation, spray drying, freeze drying and electrospraying. Preferably, the solid surfactant composition of the present invention is prepared by spray drying.

[0043] The solid surfactant composition in granular form can be prepared by means of a fluidized bed, tumble or spray drying apparatus, starting from the composition in powder form. Preferably, the granulation is carried out by means of a tumble granulation apparatus.

[0044] For example, pellets can be prepared by dry pressing or extrusion, preferably by extrusion, of the composition in powder form or in solution form.

[0045] The disclosed solid surfactant composition can be used to prepare personal care formulations comprising 0.5 to 70 wt%, preferably 1 to 60 wt%, more preferably 2 to 50 wt% of the surfactant composition.

[0046] The personal care composition of the present invention may further comprise 0.1 to 50 wt %, preferably 0.5 to 45 wt %, more preferably 5 to 40 wt % of at least one additional surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, cationic surfactants, zwitterionic surfactants, nonionic surfactants and mixtures thereof.

[0047] Anionic surfactants include: alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, alkylamide sulfonates, alkylaryl sulfonates, alkylamide ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates, α-olefin sulfonates, paraffin sulfonates, alkyl and alkylaryl phosphates, alkyl ether and alkyl aryl ether phosphates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkyl sulfoacetates, alkyl sarcosinates, acyl sarcosinates, alkyl carboxylates, fatty acid salts (soaps), alkyl ether carboxylates, non-acylated alkyl isethionates, acyl taurates, acyl glycinates and mixtures thereof.

[0048] Amphoteric or zwitterionic surfactants useful in the compositions of the present disclosure are surfactants that can be broadly described as derivatives of fatty amines or quaternary ammonium compounds that contain anionic water-solubilizing groups such as carboxylate, sulfonate, sulfate, phosphate, or phosphonate groups.

[0049] Cationic surfactants that can be used in the compositions of the present disclosure contain amino or quaternary ammonium moieties that are positively charged when dissolved in the aqueous compositions of the present invention. Examples of cationic surfactants are long chain alkyl trimethyl ammonium chloride, long chain alkyl benzyl dimethyl ammonium chloride, alkyl amine hydrochlorides, alkyl amine acetates, and di(long chain alkyl) dimethyl ammonium bromide.

[0050] In the case of anionic, cationic or amphoteric surfactants, the counterion may be monoatomic or polyatomic, inorganic or organic. Examples of counterions are: alkali metals, alkaline earth metals, transition metals, chloride, bromide, iodide, ammonium, pyridine, triethanolamine, methylsulfate.

[0051] Nonionic surfactants can be broadly defined as compounds containing a hydrophobic portion and a nonionic hydrophilic portion. Examples of the hydrophobic portion can be alkyl, alkyl aromatic and aryl aromatic. Examples of the nonionic hydrophilic portion are polyoxyalkylenes, amine oxides, hydroxyls and alkanolamides. Examples of nonionic surfactants are block copolymers of alkoxylated fatty alcohols, alkoxylated fatty acids, (poly) glycerol alkyl esters, alkoxylated distyryl and tristyryl phenols, fatty sugar esters and polyesters, fatty alkoxylated sugar esters, sorbitol and alkoxylated sorbitol fatty acid esters, polyethylene glycol and polypropylene glycol. Other examples of nonionic emulsifiers include alkyl polyglycosides, such as those represented by the above-mentioned formula II.

[0052] In a preferred embodiment of the present invention, the other surfactant of the personal care formulation of the present invention is a nonionic surfactant or a mixture of nonionic surfactants. Preferred nonionic surfactants are alkyl polyglycosides.

[0053] The personal care formulations of the present invention may also contain 0.01 to 4.0 wt. %, preferably 0.05 to 3.0 wt. % of at least one thickener. Examples of thickeners that can be used in the formulations of the present invention include inorganic and organic thickeners. Suitable inorganic thickeners are clays and silica. Suitable synthetic organic thickeners include anionic, cationic, hydrophobically modified and amphoteric acrylic copolymers (e.g., crosslinked homopolymers of acrylic acid or acrylamidopropanesulfonic acid (AMPS) or crosslinked copolymers of (meth)acrylic acid, C1-C4 acrylates and C8-C40 substituted polyethylene glycol acrylates). Suitable natural and semisynthetic organic thickeners include cellulose and nonionic, cationic, anionic and amphoteric cellulose polymers (e.g., hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose and cationic hydroxypropylcellulose); nonionic, anionic, hydrophobically modified, amphoteric and cationic polysaccharides (e.g., xanthan gum, chitosan, alginates, guar gum, carboxymethyl guar gum, hydroxypropyl guar gum, cationic guar gum, cationic hydroxypropyl guar gum; potato starch, wheat starch, rice starch, methylhydroxypropyl starch, starch phosphates, carboxymethyl starch, hydroxyethyl starch and hydroxypropyl starch). Mixtures of different thickeners may also be used.

[0054] A preferred thickening agent is xanthan gum.

[0055] In a particularly preferred embodiment, the personal care formulation of the present invention is an aqueous liquid formulation comprising 1 to 8 wt% of the composition of the present invention, 1 to 15 wt% of the alkyl polyglycoside of formula II and 0.05 to 1.0 wt% of xanthan gum.

[0056] In another particularly preferred embodiment, the personal care formulation of the present invention is a solid formulation comprising 25 to 50 wt. % of a solid composition of the present invention, 5 to 20 wt. % of an alkyl polyglycoside of formula II and 0 to 20 wt. % of at least one other surfactant.

[0057] The pH of personal care formulations is an important factor. Preferably, the pH range is between 3.5 and 7.0, more preferably between 4.0 and 6.5. Various acids, bases and buffers can be used to adjust and / or maintain the pH of the compositions of the present invention. Examples of materials for adjusting and / or maintaining pH include, but are not limited to, ammonia, sodium carbonate, sodium hydroxide, triethanolamine, hydrochloric acid, phosphoric acid, sodium hydrogen phosphate, sodium dihydrogen phosphate, citric acid, lactic acid, etc.

[0058] In addition to the above ingredients, the cosmetic formulations of the present invention may also contain other additives commonly used in the art. Examples of these additives are: moisturizers, emollients, consistency factors and sensory additives, chelating agents, solubilizers; fillers, pigments, dyes; polyquaternary ammonium compounds, such as cationic polysaccharides, as conditioning agents; essences, perfumes and / or essential oils; water-soluble and / or oil-soluble vitamins or derivatives or precursors; antioxidants and / or preservatives; pearlescent agents; exfoliants and / or scrubs; plant extracts, especially water-soluble plant extracts; hydroxy, especially α-hydroxy and / or polyunsaturated acids; phospholipids; proteins and / or amino acids and / or derivatives; electrolytes; NMF (natural moisturizing factor); foaming agents and / or stabilizers, such as monoethanolamide and / or diethanolamide and / or amine oxides; and sucrose ester derivatives.

[0059] Illustrative of personal care formulations according to the present invention are hair and skin cleansing compositions, shampoos, two-in-one shampoos, bath and shower gels, bath foams, cleansing bars and soaps, cleansing powders and concentrates, make-up removers, wet wipes soaks, cleansing foams and mousses, liquid soaps, scrubbing / exfoliating preparations, toothpastes, shaving creams and other similar use products.

[0060] Example

[0061] In the examples, the following surfactants were used:

[0062] DSCG = disodium cocoyl glutamate, 27 wt % in water;

[0063] APG citrate = disodium cocoyl glucoside citrate, 30 wt %, aqueous solution;

[0064] SCA = disodium cocoyl alanine, 26 wt %, aqueous solution;

[0065] LPG = lauryl polyglucoside, 50 wt %, aqueous solution;

[0066] LPG = Decyl polyglucoside, 50 wt %, aqueous solution;

[0067] Example 1

[0068] The solid surfactant composition according to the present invention was prepared by finely mixing 8.75 kg of APG citrate and 16.25 kg of DSCG. The mixture was then spray dried using a laboratory spray dryer (APT-5.0 from APTSOL, maximum evaporation capacity 5 kg / h).

[0069] The spray drying process begins with the atomization of the liquid mixture in the droplet atomization process. The feed of the material to be processed is carried out by a peristaltic pump, while the air flow causes the liquid to be sprayed out through the nozzle in the form of a fine mist. The droplets are in contact with the air co-currently with respect to the atomizing flow. The process is carried out in a drying chamber, followed by evaporation of the liquid and formation of dry particles. The settings of the spray dryer are shown in Table 1:

[0070] Table 1

[0071] Nozzle speed (Hz) 400 <![CDATA[Inlet air flow (m 3 / h)]]> ～145 T inlet(℃) 260 T outlet(℃) 86 Feed rate (g / h) 4500

[0072] 5.85 kg of light yellow fine powder was obtained, and its particle size distribution (based on volume) is shown in Table 2.

[0073] Table 2

[0074] Particle size μm <![CDATA[D v 10]]> 5.4 <![CDATA[D v 50]]> 23.8 <![CDATA[D v 90]]> 133.6

[0075] Example 2

[0076] The solid surfactant composition according to the present invention was prepared by finely mixing 150 g of APG citrate and 220.7 g of DSCG. The mixture was then spray dried using a laboratory spray dryer (APT-2.0 from APTSOL, with a maximum evaporation capacity of 2 kg / h). The settings of the spray dryer are shown in Table 3:

[0077] Table 3

[0078]

[0079]

[0080] A light yellow fine powder was obtained.

[0081] Example 3

[0082] The solid surfactant composition according to the present invention was prepared by finely mixing 140 g of APG citrate and 260 g of SCA. The mixture was then spray dried using a laboratory spray dryer (APT-2.0 from APTSOL, with a maximum evaporation capacity of 2 kg / h). The same spray dryer settings as in Example 2 were used.

[0083] A light yellow fine powder was obtained.

[0084] Critical micelle concentration, surface tension and contact angle

[0085] Use a tensiometer (Krues The critical micelle concentration (CMC, mg / l) and surface tension (mN / m) were determined by using the K100 of the company for 0.10 wt% active substance in deionized water (pH 5.5).

[0086] The same solution as that for the CMC determination was used and a pocket goniometer (PGX from Rycobel) was used. The contact angle on the surface of M was measured with time.

[0087] The following table shows the critical micelle concentration (CMC, mg / l) and surface tension (mN / m) of Examples 1-3 (Table 4) and the contact angle of the solid surfactant composition of Example 1 as a function of time (Table 5).

[0088] Table 4

[0089] Surface tension CMC %CMC Example 1 22.4 48 0.0048 Example 2 24.2 53 0.0053 Example 3 25.3 117 0.017

[0090] Table 5

[0091]

[0092]

[0093] Foaming evaluation

[0094] The foaming properties of the solid surfactant compositions of Examples 1-3 and the stability of the foam produced after 5 minutes were determined by a 0.10 wt. % (active substance) solution in deionized water and water with a hardness of 30°F according to the Ross-Miles method. The pH of the solution was adjusted to about 5.5 with citric acid. The test was conducted at 25°C and 40°C. A solution of the solid surfactant composition of Example 1 and lauryl polyglucoside or decyl polyglucoside prepared at a weight ratio of 1.22:1 was also evaluated.

[0095] Tables 6 and 7 show the results (in millimeters) for deionized water and hard water, respectively, as well as the results for comparative surfactants.

[0096] Table 6

[0097]

[0098] *Comparative Example

[0099] ND = not determined.

[0100] Table 7

[0101]

[0102]

[0103] *Comparative Example

[0104] ND = not determined.

[0105] NA = Not applicable

[0106] The surfactant composition of the present invention has excellent foaming performance, which is comparable to or better than well-known surfactants with good foaming properties such as decyl polyglucoside. Even when alkyl polyglucoside (i.e., lauryl polyglucoside in hard water) exhibits very poor performance, the combination of the surfactant composition of the present invention and alkyl polyglucoside still maintains excellent foaming ability.

[0107] Embodiment 4-11

[0108] Surfactant systems close to personal care formulations were prepared by dissolving different amounts of the solid surfactant composition of Example 1 and lauryl polyglucoside in deionized water, and their Roche-Mills foaming properties (mm) were measured. The pH of the surfactant solution was adjusted to about 5.0 with citric acid. Table 8 shows the amount (wt%) of the ingredients (in terms of active substances) in the formulation, their weight ratios, and the Brookfield viscosity (mPa * s)

[0109] Viscosity was measured with a Brookfield RVT viscometer at 25°C and 20 rpm.

[0110] Table 8

[0111]

[0112]

[0113] Surfactants of natural origin, such as amino acid-based surfactants, have proven to be very difficult to thicken. In contrast, the solid composition of Example 1 can be easily formulated into a self-thickening rinse composition with excellent foaming properties.

[0114] Example 12

[0115] The ingredients shown in Table 9 were used to prepare a rinse-off personal care composition containing the surfactant composition of Example 1.

[0116] Table 9

[0117]

[0118] *RVT,20rpm,25℃

[0119] Liquid rinse-off personal care compositions comprising Example 1 can be thickened by polymers such as natural or naturally derived gums without compromising lather or affecting other sensory attributes.

[0120] Embodiment 13

[0121] According to Table 10, a solid cleansing soap containing the surfactant composition of Example 1 as a main surfactant was prepared.

[0122] Table 10

[0123]

[0124] This solid soap provides gentle yet effective cleansing and creates a rich, dense lather.

Claims

1. A solid surfactant composition comprising: a) 10 to 45 wt % of C 8 -C 20 anionic carboxylate of an alkyl polyglycoside and b) 20 to 75% by weight of C 8 -C 22 N-acylamino acid salts, provided that the sum of a) and b) constitutes at least 50% by weight of the composition.

2. The surfactant composition of claim 1, comprising: a) 15 to 40 wt% of anionic carboxylate of an alkyl polyglycoside and b) 30 to 70 wt% of C 8 -C 22 N-acylamino acid salts.

3. The surfactant composition of claim 1, wherein the anionic carboxylate of the alkyl polyglycoside is represented by formula (I): [R-O-(G) x ] n -(D) y (I) in: R is a saturated or unsaturated, linear or branched aliphatic alkyl group having 6 to 20 carbon atoms; G is a reducing sugar residue, which is connected to RO through an ether O-glycosidic bond; O is an oxygen atom; D is an acyl residue of a carboxylic acid selected from the group consisting of citric acid, tartaric acid, maleic acid, malic acid, sulfosuccinic acid, and mixtures thereof, in acid or salt form; n is a number between 1 and m-1, where m is the number of carboxyl groups in the acid derived from D; x is a number between 1 and 5, which represents the average degree of polymerization of G; y is a number between 1 and 5, which represents the average degree of esterification.

4. The surfactant composition according to claim 3, in, In formula (I), D is an acyl residue of a carboxylic acid selected from the group consisting of citric acid, tartaric acid and mixtures thereof.

5. The surfactant composition according to claim 4, in, In formula (I), R is an alkyl group having 8 to 14 carbon atoms, the average degree of polymerization x is between 1.0 and 2.5 and D is an acyl residue of citric acid.

6. The surfactant composition of claim 1, further comprising 3 to 25 wt% of an alkyl polyglycoside of formula II: RO-(G) x II in, R is a saturated or unsaturated, linear or branched aliphatic alkyl group having 6 to 20 carbon atoms; G is a reducing sugar residue, which is connected to RO through an ether O-glycosidic bond; O is an oxygen atom.

7. A personal care formulation comprising 0.5 to 70 wt. % of a solid surfactant composition comprising: a) 10 to 45 wt. % of C 8 -C 20 anionic carboxylate of an alkyl polyglycoside and b) 20 to 75% by weight of C 8 -C 22 N-acyl amino acids.

8. The personal care formulation of claim 7, further comprising 0.1 to 50 wt. % of at least one other surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, cationic surfactants, zwitterionic surfactants, nonionic surfactants, and mixtures thereof.

9. The personal care formulation of claim 8, wherein the at least one additional surfactant is an alkyl polyglycoside.

10. The personal care formulation of claim 7 further comprising 0.01 to 4.0 weight percent of at least one thickener.

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