Dry shampoo composition

Abstract

Cleaning composition, which is a dry shampoo, comprising a base and propellant, wherein the base comprises sebum absorber which comprises magnetic particles, wherein the magnetic particles have a particle size in the range of from 4 nm to 50 nm, and wherein the magnetic particles are coated with a stabilizing dispersing agent, and wherein the magnetic particles are dispersed in a liquid carrier.

Claims

1. Cleaning composition, which is a dry shampoo, comprising a base and propellant, wherein the base comprises a sebum absorber which comprises magnetic particles, wherein the magnetic particles have a particle size in the range of from 4 nm to 50 nm, and wherein the magnetic particles are coated with a stabilizing dispersing agent, and wherein the magnetic particles are dispersed in a liquid carrier.

2. Composition according to claim 1, wherein the liquid carrier is an oil.

3. Composition according to claim 1 wherein the base comprises from 5 to 20% wt. of the composition.

4. Composition according to claim 1 wherein the base comprises from 2 to 75% wt of the base, the sebum absorber.

5. Composition according to claim 1 wherein the sebum absorber comprises particles of average particle size from 20 to 120 micrometer.

6. Composition according to claim 1 wherein the particles comprise styrene/polydivinylbenzene copolymer.

7. Composition according to claim 1 wherein the particles comprise acrylate.

8. Composition according to claim 7 wherein the acrylate is a hydrophobically modified acrylate.

9. Composition according to claim 8, wherein the hydrophobically modified acrylate comprises an alkyl group comprising from 8 to 22 carbons.

10. Composition according to claim 1 comprising an oil from 0.1 to 5% wt. of the base.

11. Composition according to claim 10 wherein the oil is isopropyl myristate.

Description

EXAMPLE

(1) A virgin hair switch was treated with the control by way of applying sebum directly to the switch.

(2) The switch was then treated with a dry shampoo composition comprising one of the test particles and the particles then removed with a magnet. The amount of sebum remaining was then measured as a percentage of that which was applied.

(3) TABLE-US-00001 TABLE 1 Ratio Sebum (DVB/ Removal Sample DVB Acrylate Acrylate) (% remaining) Control 86.67 PDVB 1 Divinyl 14.71 Benzene PDVB 2 Divinyl Lauryl methacrylate 1:0.1 46.15 Benzene PDVB 3 Divinyl 2-Ethylhexyl 1:0.1 15.38 Benzene methacrylate PDVB 4 Divinyl Butyl acrylate 1:0.1 21.05 Benzene PDVB 5 Divinyl Lauryl methacrylate 1:0.3 0 Benzene

(4) Particles were magnetized using Ferrofluid via suspension polymerisation. The ferrofluid encapsulated inside micro particles.

Synthesis of Magnetic Porous Particles

(5) Magnetic porous particles were prepared by suspension polymerization in a 1 L reactor equipped with a mechanical stirrer and nitrogen inlet according to the recipes shown in Table 2. The heterogeneous reaction mixture was degassed for half an hour whilst being stirred at 500 rpm. The nitrogen source was then raised above the solution and the stirring rate was dropped to 350 rpm. The reaction was allowed to proceed for 18 h at 70 C. The resulting porous particles were collected by filtration and washed by distilled water and ethanol. The particles were then left in 1 L of acetone solution stirring overnight to completely remove any linear polymer. The final product was filtered again and dried in vacuo for 24 hours at 60 C.

(6) TABLE-US-00002 TABLE 2 Sample 1 2 3 4 5 Divinyl- 40 g 40 g 40 g 40 g 40 g benzene (DVB) Lauryl 4 g methacrylate 2-Ethylhexyl 4 g methacrylate Butyl 4 g acrylate Ferrofluid 5 g 5 g 5 g 5 g 10 g (20 wt % in toluene) AIBN 0.6 g 0.6 g 0.6 g 0.6 g 0.6 g Toluene 100 ml 150 ml 150 ml 150 ml 200 ml Polyvinyl 12 g 12 g 12 g 12 g 12 g alcohol NaCl 12 g 12 g 12 g 12 g 12 g

(7) The suitable amount of ferrofluid for better magnetic action was achieved by using magnetic particles in ratio of 1:0.25 (DVB:Ferrofluid). Lowering the ratio of ferrofluid did not cause any significant magnetic action.

(8) TABLE-US-00003 TABLE 3 The following are formulations for dry shampoos comprising magnetic particles. They are made by standard processes and comprise any of the magnetic particles described in Table 1. INCI names Dry Shampoo SD Alcohol 40-B (Alcohol Denat.) 13.510 Isopropyl Myristate 0.250 Magnetic Particles 1.875 Silica 0.065 Fragrance (Parfum) 0.300 Isobutane (85%), Propane (15%) 84 100.000