Method and compositions for bleaching hair

1. A hair bleach mixture obtained by combining an aqueous oxidizing agent composition and a persulfate composition comprising at least one hydrophobically modified particulate, said hydrophobically modified particulate being present in the mixture in an amount sufficient to reduce diffusion and/or migration of the mixture from the hair strands to which it is applied.

2. The mixture of claim 1 wherein the hydrophobically modified particulate comprises a particulate filler.

3. The mixture of claim 2 wherein the amount of hydrophobically modified particulate filler in the persulfate composition ranges from about 0.01 to 60% by weight of the total persulfate composition.

4. The mixture of claim 3 wherein the persulfate composition additionally comprises, by weight of the total persulfate composition, from about 1–95% of one or more persulfates.

5. The mixture of claim 4 wherein the persulfates are ammonium, sodium, potassium, and mixtures thereof.

6. The mixture of claim 2 wherein the hydrophobically modified particulate filler is an inorganic, hydrophobically modified hydrophilic colloid, or mixtures thereof.

7. The mixture of claim 2 wherein the hydrophobically modified particulate filler comprises one or more hydrophobically modified inorganics.

8. The mixture of claim 7 wherein the hydrophobically modified inorganic is silica silylate, silica dimethylsilylate, silica dimethicone silylate, or mixtures thereof.

9. The mixture of claim 6 wherein the hydrophobically modified particulate filler is a hydrophobically modified hydrophilic colloid.

10. The mixture of claim 9 wherein the hydrophobically modified hydrophilic colloid is a cellulose modified with propoxy, butoxy, silicone, or C6–30 alkyl groups; or a hydrophobic polymer.

11. The mixture of claim 1 wherein the aqueous oxidizing agent composition comprises, by weight of the total aqueous oxidizing agent composition, from about 1–30% oxidizing agent and 70–99% water.

12. The mixture of claim 11 wherein the aqueous oxidizing agent composition additionally comprises from about 1–85% of one or more lipophilic ingredients.

13. The mixture of claim 11 wherein the aqueous oxidizing agent composition comprises from about 0.01–10% of one or more humectants.

14. The mixture of claim 11 wherein the aqueous oxidizing agent composition comprises from about 0.1–25% by weight of the total aqueous oxidizing agent composition of one or more water soluble thickeners.