SE502482C2 - Shampoo compositions comprising an amphoteric compound of the alkylaminopolyamphocarboxiglycinate type, a mixture of two monoethanolamides and an anionic surfactant - Google Patents

Abstract

Shampoo compositions comprising three components, namely at least one amphoteric compound, of the alkylaminopolyamphocarboxyglycinate type, a mixture of two monoethanol amides and an anionic surfactant. Optionally there also may be other amphoterics present.

Description

EP-A3-160507 relates to a conditioning shampoo which avoids a problem which results from the presence of the conventional conditioning agents in shampoo preparations. Due to the frequent use of these shampoos, the conditioner's ability to adhere to the hair leads to an accumulation of the same, which causes the hair to become greasy faster. The shampoo according to the patent solves this problem by providing a shampoo free from the traditional conditioning agents, but comprising at least two amphoteric surfactants, the first being a non-irritating detergent and the second primarily acting as a conditioning agent. The shampoo also optionally contains an anionic surfactant.

Shampoo compositions also often contain viscosity support substances. A group of viscosity support substances are the diethanolamides, eg CDA, coconut diethanolamide. A disadvantage of this viscosity builder, however, is that it contains small amounts, eg 140 to 2000 ppb (billionths), of nitroso compounds, a very unsuitable contaminant.

The shampoo compositions of the present invention provide the hair with a favorable conditioning effect, which results in fullness for the hair with silky feel and very good combing properties, without any accumulation of conditioner on the surface of the hair. They also provide good foaming properties and suitable viscosity builder effect with a negligible content of nitroso contaminants.

Summary of the Invention The present shampoo compositions comprise three essential components, namely at least one amphoteric compound, which is of the alkylaminopolyamphocarboxiglycinate type, a mixture of two monoethanolamides and an anionic surfactant. If desired, other amphoteric substances may also be present, selected from the groups defined below. Detailed Description of the Invention The invention relates to a shampoo composition comprising fi (i) a) at least one amphoteric compound of the general formula R (co) n - [N - (cH 2) x] y - N - Q (I) BB Varl R is a hydrocarbon group having from 7 to 22 carbon atoms, is 0, 1, 2 or 3, is 2 or 3, preferably 2, is an integer of 0 to 4, preferably 2, is CH 2 COOM or CH 2 CH 2 COOM, wherein M is hydrogen NS or an ion from the groups of alkali metals, ammonium or substituted ammonium and B is hydrogen or a group Q as defined; and if desired; (b) an amphoteric substance comprising a mixture of compounds of the general formulas R - co - N - c fl z-cnz - N - cH 2 -cooM (11a) CH 2 -CH 2 -OH CH 2 -COOM and R - CO - N - CH 2 CH 2 - N - CH 2 -COOM (IIb) I f 1H CH 2 -CH 2 -OH wherein R and M have the same meanings as defined above; and / or (c) an amphoteric compound of the general formula CH3 Ra - N + - (cH2) m-COOM (III) CH3 wherein Ra is a hydrocarbon chain having 7-21 carbon atoms and suitably is an alkyl or alkenyl group having from 17 carbon atoms; m is 1 or 2; M is suitably H or sodium ion; 502 482 (ii) a builder and (iii) one or more anionic surfactants selected from an alcohol sulphate and / or alkyl ether sulphate: characterized in that the builder has a viscosity improving ability and a foam stabilizing and foaming effect and is a mixture of coconut fatty acid monoethanolamide and rapeseed fatty acid monoethanolamide in a weight ratio of 1: 10 to 10: 1, the composition comprising 10% -60%, preferably 15% -35%, of the amphoteric component; 5% -40%, preferably 10% -25%, of the mixture of monoethanolamides; and 15% -85%, preferably 35% -65%, of the anionic surfactant, based on the total weight of these three components.

The amphoteric compound (I) was mainly used as a foaming agent and a cleaning agent. It also reduces the irritation from irritating anionic surfactants which are usually always present as components in shampoo preparations. An example of this is the commercially available Ampholak 7CX / C, sold by Berol Nobel AB, Sweden.

The main purpose of the mixture (IIa) and (IIb) is the use as a hydrotrope and a solubilizer. An example of this is the commercially available "Ampholak XCO-30", sold by Berol Nobel Ab, Sweden.

The weight ratio of the compound according to IIa to that of IIb in the mixture is in the range of 1: 10 to 10: 1, suitably in the range of 1: 5 to 5: 1.

An example of the amphoteric compound (III) is Amphoteen® Q4, commercially available from Berol Nobel AB, Sweden.

The anionic surfactant component The anionic surfactants are, for example, alkyl ether sulfates and alcohol sulfates. A preferred anionic surfactant is sodium lauryl ether sulfate ZEO (28%) under the trade name "Empicol 502 482 f ESB3". i The anionic surfactants act as foaming agents and cleaning agents.

Optional Ingredients In addition to the above components, other optional ingredients may also be incorporated into the present compositions, such as preservatives, pearlescent agents, dyes and fragrances.

Preservatives may include, for example, "Euxyl K 100" (Schülke and Mayr), benzyl alcohol, methyl chloroisothiazolinone and methyl isothiazolinone.

The agent for pearlescent effect can be, for example, "Empicol XP40" (Albright & Wilson).

The dyes may, for example, include FDC yellow and FDC orange 4.

The pH of the composition should be in the range of 5.0 to 7.0, and preferably 5.5. A pH adjusting agent may be used, such as an organic acid, eg citric or lactic acid, or an inorganic acid, eg hydrochloric acid.

The shampoo compositions of the invention comprise: 10% -60%, preferably 15% -35%, of the amphoteric component; 5% - 40%, preferably 10% -25%, of the mixture of monoethanolamides; and 15% -85%, preferably 35% -65%, of the anionic surfactant, based on the total weight of these three components.

The invention is illustrated by the following examples.

Example Two different shampoo compositions according to the invention were prepared, containing the ingredients listed in the following table. The dyes may, for example, comprise FDC yellow and FDC orange 4. The pH of the composition should be in a range of 5.0 to 7.0, and preferably 5.5. A pH adjusting agent may be used, such as an organic acid, eg citric or lactic acid, or an inorganic acid, eg hydrochloric acid.

The shampoo compositions of the invention comprise: 10% -0%, preferably 15% -35%, of the amphoteric component; 5% -40%, preferably 10% -25%, of the mixture of monoethanolamides; and 15% -85%, preferably 35% -65%, of the anionic surfactant, based on the total weight of these three components.

The invention is illustrated by the following examples.

Example gel Two different shampoo compositions according to the invention were prepared, containing the ingredients listed in the following table.

F 'a02 482 7 Table HPA4 / l28 ~ HPA4 / l29 (Product 871) (Product 872) Sodium lauric sulphate 27.5% 25.0%' empholac 7CX / C "10.0% _ 'mmpnolac Msx-2" 10.0 % amide CMA / 2,% 2,9% amide RMA / 2,% 1,0% 'Empicol XP40',% 5,0% preservative, 1% 0,1% CEuxyl KlOOÛ perfume 0,1% 0,1% @Duffi O / 66260l "ex Dragoco) FDC yellow 5 0.00025% - FDC orange 4 - 0.00025% demineralized water residue citric acid qs qs 100.0% 100.0% Ampholac MSX-2% mixture of amphoteric compounds mmpnolax 7cx / c "45%, AmpnoceeÅRå4 35%," Amph01ak xco-3o "2o o \ ° amide CMA / 2 = coconut monoethanolamide 2EO amide RMA / 2 rapeseed monoethanolamide ZEO In the composition HPA4 / 128 a content of 3-8 has been found ppb of the nitroso compound, which is negligible.

For the evaluation of the preparations HPA4 / 128 and HPA4 / 129, a so-called "half-head" test method was used.

With the half-head test, shampoo can be tested and compared in pairs. The hair on a head is washed with two products, one on each 'half. This allows direct comparisons of performance. Several parameters are determined, eg volume and texture of foam, wet and dry feeling, etc. Each is given a grade. The results are then calculated and displayed as graphs or in tables. 502 482 8 HPA4 / 128 and HPA4 / 129 were tested against a leading British conditioning shampoo for frequent use. The results from two test series using 5 and 20 heads, respectively, gave similar or improved performance for the inventive products compared to the commercial shampoo.

The invention shampoo showed excellent conditioning properties with, among other things, a silky aftertaste, a good wet feeling and rinsability.

This is achieved without the incorporation of any conditioning additives of the traditional (polymer) type.

Claims (8)

502 482 PATENT CLAIMS \ A shampoo composition comprising (i) a) at least one amphoteric compound of the general formula R (CO) - [N - (CH) 1 - N - Q n I 2 xy I (I) BB wherein is a hydrocarbon group having from 7 to 22 carbon atoms, is 0, 1, 2 or 3, is 2 or 3, preferably 2, is an integer of 0 to 4, preferably 2, is CH 2 COOM or CH 2 CH 2 COOM, wherein M is hydrogen or an ion from the groups of alkali metals, ammonium or 0% N 1 N N substituted ammonium and B is hydrogen or a group Q as defined; and if desired (b) an amphoteric substance comprising a mixture of compounds of the general formulas R - CO - N - CH 2 -CH 2 - N - CH 2 -COOM (IIa) I c fl z-cH 2 -one cH 2 -coon and R - co - N - cuzcnz - N - cuzcom (zxb) 1H CH 2 -CH 2 -OH wherein R and M have the same meanings as defined above; and / or (c) an amphoteric compound of the general formula CH3 Ra - N + - (cH2) m-cooM (III) CH3 wherein Ra is a hydrocarbon chain having 7-21 carbon atoms and suitably is an alkyl or alkenyl group having from 11 to 17 carbon atoms; m is 1 or 2; M is suitably H or sodium ion; 502 482/0 (ii) a builder and (iii) one or more anionic surfactants selected from an alcohol sulphate and / or alkyl ether sulphate, characterized in that the builder has a viscosity improving ability and a foam stabilizing and foaming effect and is of a mixture of coconut fatty acid monoethanolamide and rapeseed fatty acid monoethanolamide in a weight ratio of 1:10 to 10: 1, the composition comprising 10% -60%, preferably 15% -35%, of the amphoteric component; 5% -40%, preferably 10% -25%, of the mixture of monoethanolamides; and 15% -85%, preferably 35% -65%, of the anionic surfactant, based on the total weight of these three components. Composition according to Claim 1, characterized in that it comprises from 15% to 35% of the amphoteric component, from 10% to 25% of the monoethanolamides and from 35% to 65% of the anionic surfactant, calculated on it. total weight of these three components. 3. Composition according to claim 1 or 2, characterized in that the weight ratio of the monoethanolamides is from 1: 4 to 4: 1. Composition according to any one of the preceding claims, characterized in that the weight ratio of the amphoteric compounds of formulas IIa and IIb is in the range 1:10 to 10: 1. 5. A composition according to claim 4, characterized in that said weight ratio is in the range 1: 5 to 5: 1. Composition according to any one of the preceding claims, characterized in that the anionic surfactant is sodium lauryl ether sulphate ZEO. Composition according to any one of the preceding claims, characterized in that the pH is between 5.0 and 7.0. \ Composition according to any one of the preceding claims, characterized in that it further comprises, as optional agents for pearlescent effect, dyes, preservatives and ingredients, ring agents, fragrances and pH adjusting agents.