HAIR CONDITIONING COMPOSITION HAVING IMPROVED RINSE PROPERTIES

Abstract

A hair conditioning composition comprising a) a conditioning base comprising, by total weight of the hair conditioning composition, i) from 0.4 to 8 wt % of fatty alcohol having from 8 to 22 carbons, ii) from 0.1 to 2 wt % of cationic surfactant, b) a hydrophobically modified anionic polymer; and c) water, wherein the composition confers a Draw Mass of from 1 to 250 g to hair treated with the conditioning composition; a method of saving water during a rinse step in a hair conditioning process comprising the steps of applying to hair the hair treatment composition and rinsing the hair with water; and a use of a hydrophobically modified anionic polymer in the hair treatment composition, to save water during a hair conditioning process.

Claims

1. A hair conditioning composition comprising: a) a conditioning base comprising, by total weight of the hair conditioning composition, i) from 0.4 to 8 wt % of fatty alcohol having from 8 to 22 carbons, ii) from 0.1 to 2 wt % of cationic surfactant, b) a hydrophobically modified anionic polymer; and c) water, wherein the composition confers a Draw Mass of from 1 to 250 g to hair treated with the conditioning composition.

2. The composition according to claim 1 wherein the polymer is an acrylate polymer.

3. The composition according to claim 1 wherein the polymer is a methacrylate polymer.

4. The composition according to claim 1 wherein the hydrophobic modification comprises an alkyl group.

5. The composition according to claim 4 wherein the alkyl group comprises from 6 to 30 carbons.

6. The composition according to claim 1 comprising from 0.01 to 5% wt. polymer.

7. The composition according to claim 1 wherein the cationic surfactant has the formula N.sup.+(R.sup.1)(R.sup.2)(R.sup.3)(R.sup.4), wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently (C.sub.1 to C.sub.30) alkyl or benzyl.

8. The composition according to claim 7 wherein one, two or three of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently (C.sub.4 to C.sub.30) alkyl and the other R.sup.1, R.sup.2, R.sup.3 and R.sup.4 group or groups are (C.sub.1-C.sub.6) alkyl or benzyl.

9. The composition according to claim 1 wherein the cationic surfactant is selected from the group consisting of cetyltrimethylammonium chloride, behenyltrimethylammonium chloride and mixtures thereof.

10. The composition as claimed in claim 1, that comprises a conditioning base obtainable from a method selected from the following: i) forming a comelt in a first vessel comprising a fatty alcohol and a cationic component and 0.1 to 15 wt % water, by total weight of the comelt; adding the comelt to a second vessel containing water at 50 to 60 C.; and mixing the comelt and the water, wherein the temperature of the mixture of the comelt and the water in the second vessel is controlled such that it is maintained at from 56 to 65 C.; wherein the fatty alcohol has from 8 to 22 carbons; wherein the cationic component comprises from 0.1 to 70 wt % cationic surfactant having the formula N.sup.+R.sup.1R.sup.2R.sup.3R.sup.4; and wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently (C.sub.1 to C.sub.30) alkyl or benzyl. ii) forming a comelt in a first vessel comprising a fatty alcohol and a cationic component and 0.1 to 15 wt % water, by total weight of the comelt, independently adding the comelt and water to a mixing vessel and mixing to form a mixture, wherein the temperature of the mixture of the comelt and the water is maintained at from 56 to 65 C.; wherein the fatty alcohol comprises from 8 to 22 carbons, wherein the cationic component comprises from 0.1 to 70 wt % cationic surfactants having the formula N.sup.+R.sup.1R.sup.2R.sup.3R.sup.4, and wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently (C.sub.1 to C.sub.30) alkyl or benzyl; iii) forming an aqueous isotropic solution of a cationic surfactant; mixing the aqueous isotropic solution of cationic surfactant with a molten fatty alcohol, wherein the temperature during mixing the molten fatty alcohol with the isotropic cationic surfactant solution is maintained from 55 C. to 65 C. and wherein the fatty alcohol has from 8 to 22 carbons; iv) forming an aqueous dispersion of a fatty alcohol and an amidoamine; adding a cationic surfactant to the aqueous dispersion and mixing to form a mixture; and neutralising the amidoamine, wherein the temperature of the mixture of cationic surfactant in the aqueous dispersion is maintained at from 56 C. to 67 C.

11. A method of saving water during a conditioning process, comprising the step of applying to hair a composition comprising a) a conditioning base comprising, by total weight of the hair conditioning composition, i) from 0.4 to 8 wt % of fatty alcohol having from 8 to 22 carbons, ii) from 0.1 to 2 wt % of cationic surfactant, b) a hydrophobically modified anionic polymer; and c) water, wherein the composition confers a Draw Mass of from 1 to 250 g to hair treated with the composition, and rinsing the hair.

12. A method as claimed in claim 11, wherein the anionic polymer of the composition is an acrylate polymer or a methacrylate polymer, and the hydrophobic modification comprises an alkyl group.

13. A method as claimed in claimed in claim 11, wherein the hair is rinsed with water until a constant friction is reached.

14. (canceled)

15. (canceled)

16. The composition as claimed in claim 10, wherein the temperature is maintained at from 58 C. to 62 C.

17. The composition as claimed in claim 16, wherein the temperature is maintained at 60 C.

18. The composition as claimed in claim 10, wherein the temperature is maintained for from 5 to 60 minutes.

19. The composition as claimed in claim 18, wherein the temperature is maintained for from 10 to 40 minutes.

20. The composition as claimed in claim 19, wherein the temperature is maintained for from 15 to 30 minutes.

21. The composition as claimed in claim 10, wherein a cationic surfactant comprises from 30 to 60 wt %, by total weight of the cationic component.

22. The method as claimed in claim 12, wherein the alkyl group comprises from 6 to 30 carbons.

Description

EXAMPLE 1: COMPOSITION 1 IN ACCORDANCE WITH THE INVENTION AND COMPARATIVE COMPOSITIONS A, B AND C

[0165] The following compositions were prepared:

TABLE-US-00001 TABLE 1 Compositions of Composition 1 in accordance with the invention, and Comparative Compositions A, B and C. Material (based on 100% Amount (wt %) active) A B C 1 Behenyl Trimethyl Ammonium 1 1 1 1 Chloride Stearamidopropyldimethylamine 1 1 1 1 Lactic acid 0.32 0.32 0.32 0.32 Ceterearyl Alcohol 4 4 4 4 Amodimethicone/Dimethicone 1.5 1.5 1.5 1.5 Acrylates/Beheneth-25 Meth- 0 0.1 0 0.1 acrylate Coploymer (Aculyn 28) Fragrance/preservatives/water to 100 to 100 to 100 to 100

[0166] Conditioners A and B were prepared using the following method: [0167] 1. Water was added to a suitable vessel, lactic acid and the copolymer were added, and the vessel heated to 80 C. [0168] 2. Cetearyl alcohol was then added to the formulation along with tertiary amine salt (stearamidopropyldimethylamine). [0169] 3. At 80 C. the Behenyl Trimethyl Ammonium Chloride (BTAC) was added and the resultant mixture mixed until opaque and thick. [0170] 4. The heat was then turned off and the quench water was added. [0171] 5. The mixture was then cooled to below 40 C. the rest of the materials, including fragrance, were added. [0172] 6. Finally the formulation was mixed at high shear on a Silverson mixer at 5000 rpm for 5 minutes.

[0173] Conditioners 1 and C were prepared using the following method: [0174] 1. Water was added to a suitable vessel, lactic acid and the copolymer were added, and the vessel heated to 63 C. [0175] 2. Cetearyl alcohol was then added to the formulation along with the tertiary amine salt (stearamidopropyldimethylamine). These were allowed to melt. [0176] 3. When the temperature of the water phase had returned to its original temperature, Behenyl Trimethyl Ammonium Chloride (BTAC) was added to the formulation and the resultant mixture mixed for 30 minutes. [0177] 4. The heat was then turned off and the quench added slowly. [0178] 5. The mixture was then cooled to below 40 C. and the rest of the materials, including fragrance, were added and the mixture thoroughly mixed using a Silverson mixer at 5000 rpm for 5 minutes.

EXAMPLE 2: TREATMENT OF HAIR WITH COMPOSITIONS A-C AND 1

[0179] The hair used was dark brown European hair, in switches of 2.5 g weight and 6 inch length.

[0180] Hair was first treated with a cleansing shampoo using the following method:The hair fibres were held under running water for 30 seconds, shampoo applied at a dose of 0.1 ml of shampoo per 1 g of hair and rubbed into the hair for 30 seconds. Excess lather was removed by holding under running water for 30 seconds and the shampoo stage repeated. The hair was rinsed under running water for 1 minute.

[0181] The wet hair was then treated with Conditioner A-C or 1 using the following method:The conditioner was applied, pre-diluted at 20, 40, 80 and 160 parts water, with a dosage of 1 ml of conditioner solution per 1 g hair, (2.5 ml in total) and combed through the hair for 1 min. The hair was then securely mounted into the TA machine and friction analysis performed as below.

EXAMPLE 3: FRICTION MEASUREMENT OF HAIR TREATED WITH COMPOSITIONS A AND 1

[0182] Friction was measured using the apparatus and method of the invention as follows: Friction was measured using a TA.XT2i Texture Analyser supplied by Stable Micro Systems, Surrey, UK, and a friction probe in the form of a stainless steel cylinder, which was coated with rubber material and fitted with a weight. The friction probe had surfactant on its outer (contact) surface. The load on the friction contact was approximately 138 g. When in use, an area of contact between the outer surface of the friction probe and the hair of approximately 1.0 cm.sup.2 was achieved.

[0183] Surfactant was added to the probe as follows:

[0184] The probe was first washed with an aqueous composition of Sodium Lauryl Ether Sulphate (SLES) at a concentration of 14 wt %, by weight of the total aqueous surfactant composition, and rinsed with water. The probe was then soaked in a dilute solution of SLES having a concentration of 14 ppm, for 2 minutes, and then dried for 2 hours. The methodology used to assess the friction properties of hair treated with Conditioners A-C and 1 was as follows:

[0185] A switch of hair was securely mounted onto the texture analyser, the hair fibres being aligned by combing before being secured in a flat configuration. The hair was immersed in the water bath. The friction probe was placed onto the hair and moved along the hair at a speed of 10 mms.sup.1 to measure the friction between the probe and the hair. The measurement was repeated 30 times.

[0186] The friction values reported below are of friction hysteresis in units of gfmm, obtained by integrating the total measured friction force over the total distance travelled by the probe, with and against cuticle.

[0187] The conditioner was pre-diluted at 20, 40, 80 and 160 parts water and used to treat hair using the method described above. Friction measurements were then performed. Immersed friction measured on hair switches treated with Conditioners A-C and 1 are given in the Table below.

EXAMPLE 4: FRICTION MEASUREMENT OF HAIR TREATED WITH COMPOSITIONS A-C AND 1

[0188]

TABLE-US-00002 TABLE 2 Friction (gfmm) of hair treated with Comparative A and Composition 1 in accordance with the invention, after dilution levels of 20, 40, 80 and 160. Dilution A B C 1 significance 20 102 93 88.6 85.6 ns 40 86.7 111.9 92.2 121.9 >95% 80 92.2 128.3 99.7 135.6 >95% 160 143.7 124 135.9 139.6 >95%

[0189] It will be seen that a rinsed friction plateau is reached for hair treated with the composition of the invention sooner than with the comparative compositions.

EXAMPLE 5: COMPOSITION 2 IN ACCORDANCE WITH THE INVENTION AND COMPARATIVE COMPOSITION D

[0190] The following compositions were prepared using the same method as described above for Examples 1 and C

TABLE-US-00003 TABLE 3 Compositions of Composition 2 in accordance with the invention, and Comparative Composition D. Amount (wt %) Material (based on 100% active) D 2 Behenyl Trimethyl Ammonium Chloride 1.37 1.37 Stearamidopropyldimethylamine 0.3 0.3 Lactic acid 0.32 0.32 Ceterearyl Alcohol 3.1 3.1 Amodimethicone/Dimethicone 1.4 1.4 Acrylates/Beheneth-25 Methacrylate 0 0.25 Coploymer (Aculyn 28) Fragrance/preservatives/water to 100 to 100

EXAMPLE 6: VISCOSITY OF COMPOSITIONS 2 AND D UNDER DILUTION

[0191] When a conditioning gel phase composition is applied to hair during a wash/care process, the gel phase is deposited onto the hair surface. When the deposited gel phase comes into contact with water (during a rinse step), the structure of the gel phase must be broken up in order for it to be efficiently removed from the hair. The greater the disruption to the gel phase, the easier and faster it is removed and, ipso facto, the less water is required to complete the rinse. The disruption to the composition gel phase can be indicated by a reduction in its viscosity upon dilution with water.

[0192] For any given quantity of water, the extent of viscosity reduction indicates how quickly and easily it will be removed from the hair. This correlates with the amount of water used to rinse a conditioning composition from hair.

[0193] In the following examples, viscosity measurements were carried out on aqueous dilutions of the neat composition (Compositions 2 and D).

[0194] Samples were measured using a Brookfield viscometer with a T-A spindle as well as RV5.

[0195] The samples were prepared as 150 g dilutions as follows:

[0196] Composition (for example 75 g for a 1 in 2 dilution) was added to a beaker. Water (75 g for a 1 in 2 dilution) was then added in small amounts with mixing until homogeneous.

[0197] The sample was left to equilibrate for one hour before measurement with the Brookfield viscometer.

[0198] In this way, a series of dilutions were prepared (ensuring consistent mixing and speed of water addition throughout).

[0199] The samples were measured using the Brookfield RVDV-II+ viscometer with the following conditions: T-A bar spindle: 0.5 rpm; 60 s measurement; 5 replicates per sample.

[0200] The results are given in the following table:

TABLE-US-00004 TABLE 4 Viscosity of Composition 2 (in accordance with the invention) and Comparative Composition D. Viscosity/cP Normalised data Dilution D 2 D 2 Neat 398,400 656,800 500,000 500,000 1 in 1.25 141,200 143,200 177208.84 109013.40 1 in 1.5 113,600 72,000 142570.28 54811.21 1 in 1.75 67,600 33,200 84839.36 25274.06 1 in 2 43,200 13,600 54216.87 10353.23 1 in 3 9,600 4,000 12048.19 3045.07 1 in 4 6,800 0 8534.14 0.00

[0201] It will be seen that the viscosity of the composition in accordance with the invention drops dramatically faster than that of the comparative example, ensuring saving of water during a rinse step of a conditioning process.