CZ104299A3 - Liquid cleansing agent - Google Patents

Abstract

The present invention relates to lamellar structured liquid cleansing compositions comprising 5 % to 50 % of a surfactant system comprising (a) an anionic or mixture of anionics and (b) an amphoteric and/or zwitterionic surfactant in mixture, wherein alkalimetal alkylamphoacetate comprises 25 % to 90 % of component (b). A method of enhancing low temperature stability of such lamellar structured liquid cleansing compositions by the selection of an alkalimetal alkylamphoacetate in an amount of 25 % to 90 % of the component (b ) is provided. Excellent low temperature stability is achieved.

Description

Technical field

The present invention relates to lamellar structured liquid cleaning compositions such as those described in the related

US Application No. No. 08 / 512,010, filed Aug. 7, 1995. These compositions are generally used as skin cleansers or shower gels. In particular, the invention relates to such compositions in which the surfactant system is carefully selected to ensure good stability even when stored at low temperatures (e.g. -6.7 ° C) and lower to -17.8 ° C and to a process increasing stability at low temperatures by carefully selecting the surfactant system.

BACKGROUND OF THE INVENTION

Lamellar structured liquid cleaning compositions (e.g., shower gels) typically comprise a mixture of anionic surfactants (to provide cleaning and foam formation) and a fine surfactant. In a typical shower gel composition, the fine surfactant may be an amphoteric and / or zwitterionic surfactant such as those described in U.S. Pat. No. 08 / 512,010 mentioned above, which is hereby incorporated by reference into the present invention.

However, these lamellar structured compositions have been found to substantially dilute the product upon cooling to temperatures of -6.7 to -17.8 ° C. This loss of viscosity is undesirable.

Unexpectedly, the Applicants have found that when an alkali metal alkylamfoacetate is used in a concentration of 25% to 90% by weight, preferably 30% to 90% by weight and more preferably about 40% to 90% by weight

By weight of the amphoteric and / or zwitterionic component, the product stability of the lamellar structured surfactant system is significantly increased. Applicants have also found a method of increasing the low temperature stability of lamellar structured liquid detergent compositions by appropriately selecting an alkali metal alkyl amphoacetate comprising 25-90% by weight of an amphoteric and / or zwitterionic surfactant in compositions further comprising an anionic surfactant.

US No. No. 08 / 512,010 discloses one example (Example IX on page 23), where sodium coconut amfoacetate is used. However, neither in this example nor in the other eight examples are mixtures of other amphoteric substances (such as betaine and amfoacetate). Nowhere is it suggested or suggested that the use of mixtures of amphoteric substances will remove instability of these compositions at low temperatures. However, until problems of low temperature instability were even anticipated, it could not be known that this problem could be solved by a specially selected surfactant system.

WO 96/214266 discloses fine antibacterial cleaning compositions comprising an anionic surfactant, an amphoteric surfactant

2o the active agent, the skin moisturizer, the antibacterial agent and the water, wherein the anionic and amphoteric surfactants are present in specific ratios and concentrations.

WO 94/18292 discloses personal care compositions comprising 5 to 50% by weight of anionic and / or amphoteric surfactants, 0.1 to 20% by weight of a soluble or dispersible ethoxylated anionic surfactant, 1.5 to 10% by weight of a water soluble citrate salts, up to 3% by weight of perfume or cosmetic oil and water.

SUMMARY OF THE INVENTION

The present invention relates to lamellar structured liquid cleaning compositions comprising from 5% to 50% by weight of a surfactant system, wherein said surfactant system comprises (a) an anionic surfactant or a mixture of anionic surfactants and (b) a mixture of amphoteric and / or zwitterionic surfactants, wherein said composition comprises an alkali metal alkyl amphalate acetate and said alkali metal alkyl amphacetate comprises 25% to 90% by weight, preferably 30% to 90% by weight, and more preferably 40% to 90% by weight of the composition.

The present invention further relates to a method of increasing stability at low temperatures (i.e., temperatures from about -6.7 to -17.8 ° C) of liquid lamellar structured detergent compositions containing from about 5% to about 50% by weight of a surfactant system, which in turn contains:

(a) an anionic surfactant or a mixture of anionic surfactants; and (b) an amphoteric and / or zwitterionic surfactant or a mixture thereof, wherein said method comprises selecting component (b) in such a way that the alkali metal alkyl amphoacetate constitutes more than 25% by weight to 90% by weight, preferably about 30% by weight to 90% by weight and more preferably about 40% to 90% by weight of said component (b).

Unexpectedly, the Applicants have found that when an alkali metal alkylamphoacetate is used in an amphoteric / zwitterionic surfactant mixture in at least a minimum amount, it significantly improves the thermal stability in the cold of lamellar structured compositions against the compositions which alkylamphoacetate

The alkali metal does not contain or where it constitutes less than 25% by weight of a mixture of amphoteric / zwitterionic surfactants.

Thus, the present invention is directed to enhancing the low temperature stability of lamellar structured liquid cleaning compositions containing an amphoteric and / or zwitterionic surfactant or mixture thereof.

In one aspect, the present invention provides lamellar structured liquid cleaning compositions comprising about 5% by weight to about 50% by weight of a surfactant system, wherein said system in turn comprises:

(a) an anionic surfactant or a mixture of anionic surfactants; and v

(b) an amphoteric and / or zwitterionic surfactant or a mixture thereof, wherein the alkali metal alkylamphoacetate constitutes more than 25% to 90% by weight, preferably about 30% to 90% by weight, and more preferably about 40% to 90% by weight said component (b); and (c) a structuring agent selected from saturated or unsaturated, branched or unbranched C8-C24 liquid fatty acids or polyalkylene glycol esters of fatty acids, capric or caprylic acid, or mixtures thereof.

In another aspect, the present invention provides a method of increasing the low temperature stability of lamellar structured liquid cleaning compositions comprising from 5% to 50% by weight of a surfactant system, the surfactant system comprising:

(A) anionic surfactant or mixture of anionic surfactants; and (b) an amphoteric and / or zwitterionic surfactant or a mixture thereof, said method comprising selecting an amphoteric and / or zwitterionic surfactant component (b) such that the alkali metal alkyl amphoteric acetate constitutes more than 25% by weight to 90% by weight said component (b).

The anionic surfactant may for example be aliphatic as well as sulfonate, primary alkane (e.g., C8 -C22) sulfonate, primary alkane (e.g., Ca-C ₂ 2) disulfonate, C C ₂ 2 afkensulfonát, Cs-C ₂ 2 hydroxyalkane sulfonate or alkyl glyceryl ether sulfonate ( AGS); or an aromatic sulfonate such as an alkylbenzene sulfonate.

The anionic surfactant may also be an alkyl sulfate 15 (e.g., a C12-C18 alkyl sulfate) or an alkyl ether sulfate (including alkyl glyceryl ether sulfates).

Alkyl ether sulfates include compounds of the formula:

RO (CH ₂ CH ₂ O) _n SO 3 M 'wherein R is alkyl or alkenyl of 8 to 18 carbon atoms, preferably 12 to 20 to 18 carbon atoms, n has an average value greater than 1.0, preferably between 2 and 3; and M is a solubilizing cation such as sodium, potassium, ammonium or substituted ammonium. Ammonium and sodium lauryl ether sulfates are preferred.

*

The anionic may also be alkyl sulfosuccinates 25 (including mono- and dialkyl, e.g., C6-C22 sulfosuccinates) ;, alkyl and acyl taurates, alkyl and acyl sarcosinates, sulfoacetates, C ₂ -C 2 alkyl phosphates and phosphates, alkyl phosphate esters and alkoxyl alkyl esters , acyl lactates, C ₃ -C ₂ two monoalkyl succinates and maleates, sulphoacetates, and acyl isethionates.

• • · Β Β

The sulfosuccinates may be monoalkylsulfosuccinates of the formula: R ⁴ O ₂ CCH ₂ CH (SO ₃ M) CO ₂ M;

amido-MEA sulfosuccinates of formula

R ⁴ CONHCH ₂ CH ₂ O ₂ CCH ₂ CH (SO ₃ M) CO ₂ M wherein R ⁴ is -C ₂ -C 2 alkyl, and M is a solubilizing cation;

amido-MIPA sulfosuccinates of formula

RCONH (CH ₂ ) CH (CH ₃ ) (SO ₃ M) CO ₂ M where M is as defined above.

It also includes alkoxylated citrate sulfosuccinates; and alkoxylated 10 sulfosuccinates such as:

O

R = O- (CH ₂ CH ₂ O) _n CCH ₂ CH (SO ₃ M) CO ₂ M where n = 1-20; and M is as defined above.

The sarcosinates are generally designated by the formula RCON (CH ₃ ) CH ₂ CO ₂ M, wherein R is C 8 -C ₂ alkyl and M is a solubilizing cation.

Taurates have a general formula

R ² CONR ³ CH ₂ CH ₂ SO ₃ M wherein R ² is C 8 -C ₂ alkyl, R ³ is C 1 -C 4 alkyl, and M is a solubilizing cation.

Another class of anionic surfactants are carboxylates such as:

R- (CH ₂ CH ₂ O) _n CO ₂ M wherein R is C ₈ to C ₂ alkyl; n is 0 to 20; and M is as defined above.

* * ♦ ** ·

Other useful carboxylates are amidoalkylpolypeptide carboxylates such as Monteine LCQ® from Seppic.

Other useful anionic surfactants are C 6 -C 8 acyl isethionates. These esters are produced by reaction between an alkali metal isethionate with a mixture of aliphatic fatty acids of 6 to 18 carbon atoms and an iodine number of less than 20. At least 75% by weight of the fatty acid mixture has from 12 to 18 carbon atoms and up to 25% by weight has from 6 to 18 carbon atoms. 10 carbon atoms.

If present, the acylisethionates will generally be from about 0.5 to 15% by weight of the total composition. This component is preferably present in an amount of from 1 to 10% by weight.

The acyl isethionates may also be alkoxylated isethionates as described in Llardi et al., U.S. Pat. 5,393,466, which hereby

R is incorporated by reference into the present application. This compound has the general formula:

O X Y

II II _t

R CO-CH-CH ₂ - (OCH-CH ₂ ) _m -SO 3 M * wherein R is an alkyl group of 8 to 18 carbon atoms, m is an integer from 1 to 4, X and Y are hydrogen or an alkyl group having 1 to 4 carbon atoms and M ⁺ is a monovalent cation such as sodium, potassium or ammonium.

The anionic surfactant component will generally comprise from 1 to 10%

20% by weight of the composition, preferably 2 to 15% by weight, most preferably 5 to 12% by weight of the composition.

The anionic surfactant mixture may comprise alkyl sulfates, acyl isethionates and mixtures thereof.

The compositions of the present invention further comprise zwitterionic surfactants. Zwitterionic surfactants are, for example, those which can be broadly described as derivatives of aliphatic quaternary ammonium, phosphonium and sulfonium compounds in which the straight or branched aliphatic radicals may be present and wherein one of the aliphatic substituents contains from about

8 to about 18 carbon atoms and one contains an anionic group, for example, a carboxy, sulfonate, sulfate, phosphate or phosphonate. The general formula of these compounds is (R ³ ) x

R ² -Y ⁽⁺⁾ -CH ₂ R ⁴ Z ⁽ ·) wherein R ² represents an alkyl, alkenyl or hydroxyalkyl radical of about 8 to about 18 carbon atoms containing from 0 to about 10 ethylene oxide groups and from 0 to about 2 glyceryl groups; Y is selected from nitrogen, phosphorus and sulfur atoms; R ³ is an alkyl or monohydroxyalkyl group containing from about 1 to about 3 carbon atoms; X is 1 when Y is a sulfur atom and 2 when Y is a nitrogen or phosphorus atom; R ⁴ is alkylene or hydroxyalkylene of about 1 to about 4 carbon atoms and Z is a radical selected from the group of carboxylate, sulfonate, sulfate, phosphonate and phosphate groups.

Examples of such surfactants are:

4- [N, N-di (2-hydroxyethyl) -N-octadecylammonio] butane-1-carboxylate;

5- [S-3-hydroxypropyl-S-hexadecylsulfonio] -3-hydroxypentane-1-sulfate; 3- [β, β-diethyl-β-3,6,9-trioxatetradecoxylphosphonio] -2-hydroxypropane-1-phosphate;

3- [N, N'-Dipropyl-N-3-dodecoxy-2-hydroxypropylammonio] -propane-130 phosphonate;

3- (N, N-dimethyl-N-hexadecylammonio) propane-1-sulfonate; 3- (N, N-dimethyl-N-hexadecylammonio) -2-hydroxypropane-1-sulfonate;

«.8Γ

4- [N, N-di (2-hydroxyethyl) -N- (2-hydroxydodecyl) ammonio] butane-1-carboxylate;

3- [S-ethyl-S- (3-dodecoxy-2-hydroxypropyl) sulfonoyl propane-1-phosphate; 3- [P, P-dimethyl-β-dodecylphosphonio] -propane-1-phosphonate; and

5- [N, N-di (3-hydroxypropyl) -N-hexadecylammonio] -2-hydroxypentane-1-sulfate.

Amphoteric detergents that may be used in the present invention contain at least one acid group. This may be a carboxylic or sulfonic acid group. They contain a quaternary nitrogen atom and are therefore quaternary amido acids. They should generally contain an alkyl or alkenyl group of 7 to 18 carbon atoms, and will generally follow the general structural formula:

OR ²

R ¹ - [- C-NH (CH ₂ ) _n -] _m -N ⁺ -XY wherein R ^{1 is} alkyl or alkenyl of 7 to 18 carbon atoms;

R ² and R ³ are each independently alkyl, hydroxyalkyl or carboxyalkyl of 1 to 3 carbon atoms;

n is 2 to 4;

m is 0 to 1;

X is C 1 -C 3 alkylene optionally substituted by a hydroxyl group, and

Y is -CO ₂ - or -SO ₃ Suitable amphoteric detergents within the general formula include simple betaines of the formula:

4 4 ·· 4

4

\ .rcr.

R ²

AND

R ¹ —N ⁺ —CH ₂ CO ₂ and amidobetaines of formula:

R ²

AND

R ¹ —GONH (CH2) _m —N ⁺ —CH ₂ CO ₂ wherein m is 2 or 3.

Betaines are typically present in the compositions of the present invention in an amount of 0 to 25% by weight, for example 0.1 to 25% by weight. ’

In both formulas, R ¹ , R ^2, and R ^{3 are} as defined above. In particular, R ¹ may be a mixture of C ₁₂ and C ₁ alkyl groups derived from coconut fat, so that at least half, preferably at least three quarters of the groups have R ¹ . 10 to 14 carbon atoms. R ² and R ³ are preferably methyl.

Another possibility is that the amphoteric detergent is a sulfobetaine formula

R ² R ¹ N ⁺ _ (CH ₂ ) ₃ SO ₃ · or

9999

MT.

9 9 9 1

99 * 9

9 9 9

998 9 9 9

9

R ^{1 -} CONH (CH 2) m - N ⁺ - (CH 2) ₃ SO ₃ wherein m is 2 or 3, or variants thereof, wherein the (CH ₂ ) ₃ SO ₃ group is replaced by io OH

AND

-CH ₂ CHCH ₂ SO ₃

In these formulas, R ¹ , R ^2, and R ^{3 are} as previously described.

The amphoteric / zwitterionic surfactant generally comprises 0.1 to 20% by weight, preferably 5 to 15% by weight of the composition.

A critical aspect of the present invention is the fact that the 20 zwitterionic amphoteric compounds must be used in mixtures of zwitterionic / amphoteric compounds, wherein one component of the mixture is an alkali metal alkylamphoacetate. Further, the alkali metal alkyl amphacetate must comprise 25 to 90% by weight, preferably 30 to 90% by weight, and more preferably 40 to 90% by weight of the composition. The amount of the alkali metal alkylamfoacetate may suitably range from 30% to 75% by weight, for example 40% to 60% by weight of the composition.

Examples of alkali metal alkyl amphoacetates are, without limitation, sodium or potassium lauric or coconut amfoacetate.

· »

The total amount of amphoteric / zwitterionic agents, including amfoacetate, should preferably be no more than 20% by weight, more preferably no more than 15% by weight. The total content of amphoteric / zwitterionic substances should be at least 5% by weight of the composition.

In addition to one or more anionic and amphoteric and / or zwitterionic surfactants, the surfactant system may optionally contain a nonionic surfactant.

Useful nonionic surfactants are in particular the reaction products of compounds with hydrophobic groups and a reactive hydrogen atom, for example aliphatic alcohols, acids, amides or alkylphenols with alkylene oxides, in particular ethylene oxide either alone or in admixture with propylene oxide. Specific nonionic detergent compounds are alkyl _(C6-C22) fenolyethylenoxid condensation products of aliphatic (C ₃ -C ₁₈₎ primary or secondary linear or branched alcohols with ethylene oxide, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. Other so-called nonionic detergent compounds include tertiary amine oxides, tertiary phosphine oxides and long chain dialkyl sulfoxides.

The nonionic surfactant may also be a sugar amide, such as a polysaccharide amide. The surfactant may be

In particular one of the lactobionamides described in U.S. Pat. No. 5,389,279 (Au et al.), Which is hereby incorporated by reference, or may be one of the sugar amides disclosed in U.S. Pat. No. 5,009,814 (Kelkenberg), which is hereby incorporated by reference in the present application.

Other useful surfactants are described in the US patent.

No. No. 3,723,325 (Parran Jr.) and non-ionic alkylpolysaccharide-based surfactants are described in U.S. Patent No. 4,565,647 to Llenado, both of which are also incorporated herein by reference.

Preferred alkylpolysaccharides are alkylpolyglycosides of the formula

R ² O (C _n H _{2 n} O) t (glycosyl) _x

Wherein R ² is selected from alkyl, alkylphenyl, hydroxyalkyl, hydroxyalkylphenyl and mixtures thereof, wherein the alkyl groups contain from about 10 to about 18, preferably from about 12 to about 14 carbon atoms; n is 0 to 3, preferably 2; t is from 0 to about 10, preferably 0, and x is from 1.3 to about 10, preferably from 1.3 to about 2.7. Glycosyl is preferably derived from glucose. To prepare these compounds, an alcohol or an alkylpolyethoxy alcohol is first produced, which is then reacted with a glucose or glucose source to form a glucoside (attachment at position 1). The additional 10 glycosyl units may then be attached between their 1-position and the 2-, 3-, 4- and / or 6-, preferably predominantly 2-position of the preceding glycosyl unit.

Nonionic surfactants comprise 0-10% by weight of the composition.

In general, the compositions of the invention are free of soaps.

The present invention provides compositions utilizing typically 0.1 to 15% by weight, preferably 1 to 10% by weight, of a structuring agent that acts to form a lamellar phase in the compositions. This lamellar phase is advantageous because it allows easier suspending of particles (for example emollients) in the compositions while still maintaining good shear-thinning properties. The lamellar phase also provides the desired product rheology - "heaping".

More specifically, if the composition does not have a lamellar structure and improved particle suspension is desired, it is customary to add external structurants such as carbomers (e.g., crosslinked polyacrylate such as Carbopol®) and clays. However, these outer structurants have inferior shear dilution properties, making them substantially less acceptable to customers. . '

The structuring agent is usually a liquid fatty acid or an ester derivative thereof with an unsaturated and / or branched long • 0 0 · 00

0

00 00 00 0 0 0 0 0 0

0 0 0 0 0 ·

0 0 0 0 0

00 00 00 chain (C ₈ -C ₂ 4); and / or a liquid alcohol or an unsaturated and / or branched long chain ether derivative thereof. It may also be a short-chain saturated fatty acid such as capric or caprylic acid. Without wishing to be bound by theory, it is believed that the unsaturated portion of the fatty acid or alcohol or the branched portion of the fatty acid or alcohol leads to the "rearrangement" of the hydrophobic chains of the surfactant and induces lamellar phase formation.

Examples of liquid fatty acids that may be used are oleic, isostearic, linoleic, linolenic, ricinoleic, elaidic, arachidonic, myristolic and palmitoleic acids. The ester derivatives include propylene glycol isostearate, propylene glycol oleate, glyceryl isostearate, glyceryl oleate and polyglyceryl diisostearate.

Examples of alcohols are oleyl alcohol and isostearyl alcohol. Examples of the 15 ether derivatives are isosteareth or olethecarboxylic acid; or isosteareth or olethalcohol.

The structuring agent may be defined by a melting point of less than about 25 ° C.

One of the main advantages of the invention is the ability to suspend 20o oil / emollient particles in the lamellar phase of the composition.

The various classes of oils are listed below.

Vegetable oils: peanut oil, castor oil, cocoa butter, coconut oil, corn oil, cottonseed oil, olive oil, palm kernel oil, rapeseed oil, star oil, sesame oil 25 and soybean oil.

Esters: butyl myristate, cetyl palmitate, decyl oleate, glyceryl laurate, glycerylricinoleate, glyceryl stearate, glyceryl isostearate, hexyl laurate, isobutyl palmitate, isocetyl stearate, isopropyl isostearate, isopropyl laurate, isopropyl palmitate, isopropyllineate,

4 · ···· 4 99 99 99 · · 4 4 9 4 · · 4 ·

4 4 ♦ ♦ ** ** 9 9 9 9 9 9 9 999 999 • -1C · · · · · · · ·

-.40 »propylene glycol monolaurate, propylene glycol ricinoleate, propylene glycol stearate and propylene glycol isostearate.

Animal fats: acetylated alcohols of lanolin, lanolin, lard, mink oil and tallow.

Fatty acids and alcohols: behenic acid, palmitic acid, stearic acid, behenyl alcohol, cetyl alcohol, eicosanyl alcohol and isocetyl alcohol.

Other examples of oils / emollients include mineral oil, petrolatum, silicone oil such as dimethylpolysiloxane, lauryl 10 and myristyl lactate.

It should also be understood that, if the emollient may also have the function of a structurant, it should not be included twice, for example if the structurant is 15% oleyl alcohol, no more than 5% oleyl alcohol should be added as 'emollients' the substance (whether acting as a plasticizer or structurant) never constitutes more than 20% by weight, preferably more than 15% by weight of the composition.

The emollient / oil is usually used in an amount of 1 to 20% by weight, preferably 1 to 15% by weight of the composition. In general, it should not comprise more than 20% by weight of the composition.

The compositions of the invention may additionally contain the following optional ingredients:

Organic solvents such as ethanol; auxiliary thickeners such as carboxymethylcellulose, magnesium aluminum silicate, hydroxyethylcellulose, methylcellulose, carbopols, glucamides or Antil® from Rhone Pouleno; perfumes, sequestering agents such as tetrasodium ethylenediaminetetraacetic acid (EDTA), EHDP or mixtures in an amount of 0.01 to 1% by weight, preferably 0.01 to 0.05% by weight; and dyes, opacifiers, and pearlizers such as zinc stearate, magnesium stearate, T1O2, EGMS

4444 • 4

4 4 4

44 ··

4 »

4 4 4 ·

44

4 4 4 4

4

44 (ethylene glycol monostearate) or Lytron 621 (styrene / acrylate copolymer); all of which are useful in improving the appearance or cosmetic properties of the product.

The compositions may further comprise antimicrobial agents such as 25 hydroxy-4,2 ', 4'-trichlorodiphenyl ether (DP300); preservatives such as dimethylolmethylhydantoin (Glydant XL1000), parabens, sorbic acid, etc.

The compositions may also contain coconut acyl mono- or diethanolamides for enhancing mythicity, and also strongly ionizing salts such as sodium chloride and sodium sulfate may also be used.

Advantageously, antioxidants such as butylated hydroxytoluene (BHT) may also be used in amounts of 0.01% by weight or more.

Useful cationic conditioning agents include type 15 Quatrisoft LM-200 Polyquaternium-24, Merquat Plus 3330 Polyquaternium 39; and Jaguar®.

Polyethylene glycols that may be used include:

Polyox

Polyox

Polyox

WSR-205

WSR-N-60K

WSR-N-750

PEG 14M,

PEG 45M, or

PEG 7M.

Useful thickeners include Amerchol Polymer HM 1500 (Nonoxynyl Hydroxyethyl Cellulose); Glucam DOE 120 (PEG 120 Methyl Glucose Dioleate); Rewoderm® (PEG 120 coconut, palm or tallow ester with glycerol) by Rewo

Chemicals; Antil® 141 (from Goldschmidt). A particularly preferred thickener is xanthan gum. However, xanthan gum also helps to remove instability in cold storage, especially when used with the surfactant system of the invention. Another optional component is the deflocculating polymers described in the US

No. 3o of the patent no. No. 5,147,567 (Montague), which is hereby incorporated by reference.

· To 9 9 9 to 9 9 9 9 9 · to 9 · to to 9 · to to 9 · to

- * 4 f -to · ·· ·· ·· ··

Other useful ingredients are skin peeling agents such as polyoxyethylene beads, nut leaves, and apricot seeds.

The compositions of the present invention are typically personal care products 5, but are not strictly limited thereto.

BRIEF DESCRIPTION OF THE DRAWINGS

Giant. 1 shows the cold stability of various lamellar structured liquid cleaners at -9 and -17.8 ° C. As can be seen, even if the alkali metal alkylamphoacetate constitutes 25% by weight of all amphoteric surfactants (e.g., amfoacetate + betaine), there will be a dramatic increase in stability.

The invention will be described in more detail in the following 15 non-limiting examples. The examples are given by way of illustration only and are not intended to limit the invention in any way. Other modifications within the scope of the present invention will be apparent to those skilled in the art.

All percentages in the application and examples are by weight unless otherwise indicated.

This to this this to this to it to it to it to it to it

DETAILED DESCRIPTION OF THE INVENTION

The following resources are used in the examples:

Component * AND II III IV Kokamidopropylbetain 12 9 6 0 Sodium Lauroamfoacetate 0, 3 6 12 Sodium coconut isethionate 6.5 6.5 6.5 6.5 Sodium laureth sulfate 6.5 6.5 6.5 6.5 Thickener / Polymer (e.g. cationic, guar or xanthan gum 0.1 to 1 0.1 to 1. 0.1 to 1 0.1 to 1 Emollient 1 to 7 1 to 7 1 to 7 1 to 7 Structure 3 to 10 3 to 10 3 to 10 3 to 10 Titanium dioxide 0.2 0.2 0.2 0.2 DMDM hydantoin. 0.2 0.2 0.2 0.2 Perfume 1.0 1.0 1.0 1.0 BHT 0.0075 0.0075 0.0075 0.007 Water to 100.0 to 100.0 to 100.0 do 1.00,0

Examples 1-4

The formulations listed above as I to IV are stored in plastic cups at -9 and -17.8 ° C for one day and then allowed to return to room temperature. Handling of samples was performed with care to avoid swirling of the sample as it was shaken. These products increase the viscosity. The viscosity of the sample is then measured with a Brookfield RV Viscometer attached to a helipath using a T-Bar Spindle A spindle.

·· 4444

44 • · ·

4 44 4

- Λ9 ·· 4 * 4 · 4

44

4 · 4> 4 4

4

4 «44

The results are shown in Table 1 below:

Example % by weight of amfoacetate in the mixture betaine / amfoacetate Viscosity with T-Bar rotor Pokojová temperature After 1 day at -9 ° C After 1 day at -17.8 ° C 1 0 88 400 22 800 22 400 2 25 50 91 200 26 000 33 200 3 87 200 84 000 83 200

As can be seen from the Table and Figure 1 (Examples 2 and 3), when amphoteric acid 5 constitutes about 25% by weight or more, preferably about 30% to 90% by weight, and most preferably about 40% to 90% by weight of the amphoteric compound mixture. (betaine / amfoacetate mixture), the low temperature viscosity of -9 ° C and -17.8 ° C remains much higher. Thus, it will be appreciated that the low temperature viscosity / phase stability is much superior to compositions in which the amfoacetate is not used or constitutes less than 25% by weight of the composition (e.g. Example 1).

Represented by:

Claims (12)

PATENT CLAIMS A lamellar structured liquid cleaning composition, characterized in that it comprises from 5% to 50% by weight of a surfactant system comprising: (a) an anionic surfactant or a mixture of anionic surfactants; (b) an amphoteric and / or zwitterionic surfactant or a mixture thereof; wherein the alkali metal alkylamphoacetate constitutes 25% to 90% by weight of component (b); and (c) a structuring agent selected from saturated or unsaturated, 15 branched or unbranched C8-C24 liquid fatty acids or fatty acid esters of polyalkylene glycols, capric or caprylic acid, or mixtures thereof. 20 May Composition according to claim 1, characterized in that the alkali metal alkylamfoacetate constitutes 30 to 90% by weight of component (b). A composition according to claim 2, wherein the alkali metal alkylamfoacetate constitutes 40 40 to 90% by weight of components (b). »« ································· Β · · «· · · · *Ηζ «*» ···· · · ’- · * · A composition according to claim 1 wherein the anionic surfactant is selected from the group of alkyl sulfates, acyl isethionates, and mixtures thereof. Composition according to claim 1, characterized in that component (b) contains 0.1 to 25% by weight of betaine. 6. A composition according to claim 1 further comprising from 0 to 10% by weight of a nonionic surfactant. Composition according to any one of the preceding claims, characterized in that the liquid fatty acid is oleic, isostearic, linoleic, Ricinol, elaid, arachidone, myristol, palmitol and mixtures thereof. Composition according to any one of the preceding claims, characterized in that the fatty acid ester 20 with polyalkylene glycol is propylene glycol isostearate, propylene glycol stearate, glycerol isostearate, glyconyl oleate, polyglycol diisostearate and mixtures thereof. 9. A method of increasing the stability of a lamellar structured liquid A detergent composition according to claim 1 at low temperatures, characterized in that it comprises selecting an amphoteric and / or zwitterionic surfactant component (b) such that the alkali metal alkylamphoacetate constitutes 25 to 90% by weight of component (b). 09 «0 08 00 9 # 008 · - • ar - .. 09 09 0 · * 8 · «· 0 0 909 0 0 0 9 0 0 0 0 0 0 The process according to claim 9, wherein the alkali metal alkylamphoacetate constitutes 30 to 90% by weight of component (b). The process according to claim 10, wherein the alkali metal alkylamphoacetate constitutes 40 to 90% by weight of component (b). io The method of any one of claims 9 to 11, wherein the lamella structured liquid cleaning composition comprises one or more of the ingredients of claims 4 to 6.