Dry shampoo and related methods

A dry shampoo composition comprising, by weight percent of the total composition:

• about 50.0 wt % to about 70.0 wt % dimethyl ether;
• about 15.0 wt % to about 30.0 wt % water;
• about 5.0 wt % to about 15.0 wt % ethanol;
• about 0.1 wt % to about 2.0 wt % of a preservative comprising phenoxyethanol and ethylhexylglycerin;
• about 0.005 wt % to about 0.1 wt % a polymeric film-former comprising PVM/MA decadiene crosspolymer;
• about 0.001 wt % to about 0.1 wt % a pH adjusting agent comprising sodium hydroxide;
• about 0.1 wt % to about 1.0 wt % glycerin;
• about 0.5 wt % to about 2.0 wt % propanediol;
• about 0.05 wt % to about 0.5 wt % tetrasodium glutamate diacetate;
• about 0.5 wt % to about 2.0 wt % a hydrophobic emollient comprising C13-15 alkane and heptyl undecylenate;
• about 0.1 wt % to about 1.0 wt % terpinolene;
• and
• about 2.0 wt % to about 6.0 wt % an oil-absorbing component,
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.72.

A dry shampoo composition comprising, by weight percent of the total composition:

• about 30.0 wt % to about 90.0 wt % of a first propellant;
• about 30.0 wt % to about 90.0 wt % of a second propellant;
• about 5.0 wt % to about 40.0 wt % of at least one alcohol;
• about 1.0 wt % to about 20.0 wt % of at least one starch;
• up to about 5.0 wt % of a citric acid;
• up to about 5.0 wt % of lactic acid;
• up to about 5.0 wt % hectorite clay;
• up to about 5.0 wt % of at least one fragrance;
• and
• up to about 5.0 wt % of at least one chelating agent comprising:
• from about 35.0 wt % to about 63.9 wt % sodium polyitaconate, from about 35.0 wt % to about 61.0 wt % sodium citrate and from about 0.10 wt % to about 5.0 wt % Sapindus mukorossi fruit extract,
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.74.

A dry shampoo composition comprising by weight percent of the total composition:

• about 30.0 wt % to about 90.0 wt % of a first propellant;
• about 30.0 wt % to about 90.0 wt % of a second propellant;
• about 5.0 wt % to about 40.0 wt % of an alcohol;
• about 1.0 wt % to about 20.0 wt % of a starch;
• up to about 5.0 wt % of isopropyl isostearate;
• up to about 5.0 wt % of sea buckthorn seed oil;
• up to about 5.0 wt % of at least one odor neutralizer,
• up to about 5.0 wt % hectorite clay;
• and
• up to about 5.0 wt % of at least one fragrance,
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.74.

A method of refreshing or cleansing hair without water, the method comprising:

• providing a dry shampoo composition;
• and
• dispensing the dry shampoo composition to the scalp or hair of a subject in need thereof to reduce oiliness and refresh the hair without rinsing,
• wherein the dry shampoo composition comprises:
• about 70.0 wt % to about 85.0 wt % dimethyl ether;
• about 5.0 wt % to about 15.0 wt % isopropyl alcohol;
• about 8.0 wt % to about 12.0 wt % rice starch;
• about 0.1 wt % to about 1.0 wt % silica;
• about 0.05 wt % to about 0.5 wt % isopropyl palmitate;
• and
• optionally, about 0.05 wt % to about 1.0 wt % fragrance,
• wherein the composition is substantially free of talc and water, and
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.72;
• or
• wherein the dry shampoo composition comprises:
• about 50.0 wt % to about 70.0 wt % dimethyl ether;
• about 15.0 wt % to about 30.0 wt % water;
• about 5.0 wt % to about 15.0 wt % ethanol;
• about 0.1 wt % to about 2.0 wt % a preservative comprising phenoxyethanol and ethylhexylglycerin;
• about 0.005 wt % to about 0.1 wt % a polymeric film-former comprising PVM/MA decadiene crosspolymer;
• about 0.001 wt % to about 0.1 wt % a pH adjusting agent comprising sodium hydroxide;
• about 0.1 wt % to about 1.0 wt % glycerin;
• about 0.5 wt % to about 2.0 wt % propanediol;
• about 0.05 wt % to about 0.5 wt % tetrasodium glutamate diacetate;
• about 0.5 wt % to about 2.0 wt % a hydrophobic emollient comprising C13-15 alkane and heptyl undecylenate;
• about 0.1 wt % to about 1.0 wt % terpinolene;
• and
• about 2.0 wt % to about 6.0 wt % an oil-absorbing component,
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.72, or
• about 30.0 wt % to about 90.0 wt % of a first propellant;
• about 30.0 wt % to about 90.0 wt % of a second propellant;
• about 5.0 wt % to about 40.0 wt % of at least one alcohol;
• about 1.0 wt % to about 20.0 wt % of at least one starch;
• up to about 5.0 wt % of a citric acid;
• up to about 5.0 wt % of lactic acid;
• up to about 5.0 wt % hectorite clay;
• up to about 5.0 wt % of at least one fragrance;
• and
• up to about 5.0 wt % of at least one chelating agent that includes from about 35.0 wt % to about 63.9 wt % sodium polyitaconate, about 35.0 wt % to about 61.0 wt % sodium citrate and about 0.10 wt % to about 5.0 wt % Sapindus mukorossi fruit extract,
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.74, or
• about 30.0 wt % to about 90.0 wt % of a first propellant;
• about 30.0 wt % to about 90.0 wt % of a second propellant;
• about 5.0 wt % to about 40.0 wt % of an alcohol;
• about 1.0 wt % to about 20.0 wt % of a starch;
• up to about 5.0 wt % of isopropyl isostearate;
• up to about 5.0 wt % of sea buckthorn seed oil;
• up to about 5.0 wt % of at least one odor neutralizer,
• up to about 5.0 wt % hectorite clay;
• and
• up to about 5.0 wt % of at least one fragrance;
• wherein the composition exhibits a maximum incremental reactivity (MIR) value of less than 0.74, and
• wherein each wt % is based on the total weight of the respective dry shampoo composition.