HAIR CONDITIONING COMPOSITION FOR IMPROVED DEPOSITION

Abstract

A composition provides superior deposition of benefit agent to hair, said composition comprising: (i) 0.01 to 10 wt % of a linear cationic conditioning primary surfactant; selected from structure 1 and mixtures thereof: Structure 1 wherein: R1 comprises a linear alkyl chain having a carbon-carbon chain length of from C16 to C24, preferably C18 to C22; 10. R2 comprises a proton or a linear alkyl chain having a carbon-carbon chain length of from C1 to C4, preferably C1 to C2 or a benzyl group; and X is an organic or inorganic anion; (ii) 0.1 to 10 wt % of a linear fatty material; 15 (iii) a particulate benefit agent selected from conditioning actives and mixtures thereof; (iv) 0.01 to 5 wt %, of a linear cationic co-surfactant, selected from structure 2 and mixtures thereof wherein: R2 comprises a proton or a linear alkyl chain having a carbon-carbon chain length of from C1 to C4, preferably C1 to C2 or a benzyl group; R3 comprises a linear alkyl chain having an atom-atom chain length of from 3 to 15, 25 preferably 10 to 14; and #X is an organic or inorganic anion; J30413EP CPL—24—wherein the carbon-carbon chain length of R1 in structure 1 differs from the atom-atom chain length of R3 in structure 2 by at least 3 atoms, such that the carbon-carbon chain length of R1 is structure 1 is longer than the atom-atom chain length of R3 in structure 2; and wherein the molar ratio of linear cationic co-surfactant (iv) to linear cationic conditioning primary surfactant (i) is in the range of from 1:20 to 1:1.

##STR00001##

Claims

1. A composition comprising: (i) 0.01 to 10 wt % of a linear cationic conditioning primary surfactant selected from structure 1 and mixtures thereof: ##STR00006## wherein: R.sub.1 comprises a linear alkyl chain having a carbon-carbon chain length of from C.sub.16 to C.sub.24; R.sub.2 comprises a proton or a linear alkyl chain having a carbon-carbon chain length of from C.sub.1 to C.sub.4 or a benzyl group; and X is an organic or inorganic anion; (ii) 0.1 to 10 wt % of a linear fatty material; (iii) a particulate benefit agent selected from conditioning actives and mixtures thereof; and (iv) 0.01 to 5 wt % of a linear cationic co-surfactant, selected from structure 2 and mixtures thereof ##STR00007## wherein: R.sub.2 comprises a proton or a linear alkyl chain having a carbon-carbon chain length of from C.sub.1 to C.sub.4 or a benzyl group; R.sub.3 comprises a linear alkyl chain comprising an ether group and having an atom-atom chain length of from 3 to 15; and X is an organic or inorganic anion; wherein the carbon-carbon chain length of R.sub.1 in structure 1 differs from the atom-atom chain length of R.sub.3 in structure 2 by at least 3 atoms, such that the atom-atom chain length of R.sub.1 in structure 1 is longer than the atom-atom chain length of R.sub.3 in structure 2; and wherein the molar ratio of linear cationic co-surfactant (iv) to linear cationic conditioning primary surfactant (i) is in the range of from 1:20 to 1:1.

2. The composition as claimed in claim 1, wherein the carbon-carbon chain length of R.sub.1 in structure 1 differs from the atom-atom chain length of R.sub.3 in structure 2 by from 3 to 12, atoms, such that the carbon-carbon chain length of R.sub.1 is structure 1 is longer than the atom-atom chain length of R.sub.3 in structure 2.

3. The composition as claimed in claim 1, wherein R.sub.3 comprises a linear alkyl chain having an atom-atom chain length of from 6 to 14.

4. The composition as claimed in claim 1, wherein the linear cationic conditioning primary surfactant is selected from behenyltrimethylammonium chloride, behentrimonium methosulphate, cetyltrimethylammonium chloride, and mixtures thereof.

5. The composition as claimed in claim 1, wherein the conditioning actives are selected from silicone emulsions and oils.

6. The composition as claimed in claim 5, wherein the conditioning actives are selected from emulsions of dimethicone, dimethiconol, amodimethicone, hydrocarbon oils, fatty esters and mixtures thereof.

7. The composition as claimed in claim 6, wherein the conditioning actives are selected from emulsions of dimethicone, dimethiconol, amodimethicone, paraffin oil, mineral oil, saturated and unsaturated dodecane, saturated and unsaturated tridecane, saturated and unsaturated tetradecane, saturated and unsaturated pentadecane, saturated and unsaturated hexadecane, polyisobutylene, cocoa butter, palm stearin, sunflower oil, soyabean oil, coconut oil and mixtures thereof.

8. The composition as claimed in claim 6, wherein the conditioning actives are selected from emulsions of dimethicone, dimethiconol, amodimethicone and mixtures thereof.

9. The composition as claimed in claim 1, wherein the particulate benefit agent is present in an amount of from 0.1 wt % to 10 wt % of the total composition.

10. The composition as claimed in claim 1, wherein the linear cationic co-surfactant is present in an amount of from 0.1 to 2 wt %.

11. The composition as claimed in claim 1, wherein the molar ratios of linear cationic co-surfactants (iv) to linear cationic surfactants (i) are in the range of from 1:10 to 1:1.

12. The composition as claimed in claim 1, which has a viscosity of from 5,000 to 750,000 centipoise, as measured at 30° C. on a Brookfield RVT using a Spindle A or B at 0.5 rpm for 60 seconds on a Helipath stand.

13. The composition as claimed in claim 1, wherein X.sup.− comprises an anion selected from a halide, a methanesulfonate group and an ethanesulphonate group.

14. A method of increasing deposition of a particulate benefit agent selected from conditioning actives, to hair comprising: applying to hair a composition as claimed in claim 1, and rinsing the hair with water.

15. The composition as claimed in claim 1, wherein in structure 1, R.sub.1 comprises a linear alkyl chain having a carbon-carbon chain length of from C.sub.18 to C.sub.22; and R.sub.2 comprises a proton or a linear alkyl chain having a carbon-carbon chain length of from C.sub.1 to C.sub.2.

16. The composition as claimed in claim 1, wherein in structure 2, R.sub.2 comprises a proton or a linear alkyl chain having a carbon-carbon chain length of from C.sub.1 to C.sub.2; and R.sub.3 a linear alkyl chain comprising an ether group and having an atom-atom chain length of from 10 to 14.

17. The composition as claimed in claim 2, wherein the carbon-carbon chain length of R.sub.1 in structure 1 differs from the atom-atom chain length of R.sub.3 in structure 2 by from 6 to 10 atoms, such that the carbon-carbon chain length of R.sub.1 in structure 1 is longer than the atom-atom chain length of R.sub.3 in structure 2.

18. The composition as claimed in claim 3, wherein R.sub.3 comprises a linear alkyl chain having an atom-atom chain length of from 10-14.

19. The composition as claimed in claim 9, wherein the silicone emulsion is present in an amount of from 0.25 wt % to 3 wt % of the total composition.

20. The composition as claimed in claim 10, wherein the linear cationic co-surfactant is present in an amount of from 0.2 to 0.7 wt %.

21. The composition as claimed in claim 11, wherein the molar ratios of linear cationic co-surfactants (iv) to linear cationic surfactants (i) are in the range of from 1:5 to 1:2.

Description

EXAMPLES

Example 1

Composition 1 in Accordance with the Invention and Comparative Example A

[0134]

TABLE-US-00001 TABLE 1 Compositions of example 1, in accordance with the invention and comparative example A. Amounts are shown in wt % by wt of total composition. Ingredient Example A Example 1 Behentrimonium Chloride 1.60 1.60 Cetearyl Alcohol 3.20 3.20 N,N,N-trimethyl-2- 0.37 — (octadecyloxy)ethan-1- aminium chloride N,N,N-trimethyl-2- — 0.25 (octyloxy)ethan-1-aminium chloride Dimethicone 600K and 1.00 1.00 Amodimethicone 2000 nm Perfume 0.60 0.60 Preservative 0.1  0.1  Water to 100 to 100

[0135] The conditioners in examples 1 and A can be prepared using the following method: [0136] 1. Surfactants and fatty materials are added to a suitable vessel and heated to above the melting point of the fatty materials. [0137] 2. The molten blend is added to a suitable amount of water according to the compositions in Table 1, at a temperature of between room temperature and below the melting point of the fatty materials. [0138] 3. The mixture is mixed until opaque and thick. [0139] 4. The heat is then turned off, cooled to room temperature, and the rest of the water is added along with the remaining materials. [0140] 5. Finally, the formulation is mixed at high shear using a suitable homogenising device.

[0141] Predicted conditioning performance (silicone deposition by XRF) is given in Table 2 below.

TABLE-US-00002 Example A Example 1 Conditioning No Significant performance advantage advantage