Post-foaming shave gel
View Patent ↗A soap-free self-foaming shave gel composition is disclosed which maintains superior performance attributes while avoiding the harshness and drying associated with soap-based and other ionic shave preparations. The composition is a non-ionic shave gel composition which comprises water, a water-insoluble fatty alcohol, a non-ionic emulsifier, a volatile self-foaming agent, and a non-volatile paraffinic hydrocarbon fluid.
1. A substantially non-ionic shaving composition in the form of a self-foaming gel comprising, in percent by weight, about 60 to 90% water; about 2 to 20% of at least one C 12 -C 18 water-insoluble normally solid fatty alcohol; an emulsifier comprising from 0.2 to 10% of at least one ethoxylated C 14 -C 22 fatty alcohol with from 50 to 150 moles ethylene oxide per mole of fatty alcohol and from 0 to 20% of at least one ethoxylated C 12 -C 18 fatty alcohol with from 15 to 30 moles ethylene oxide per mole of fatty alcohol; about 0.5 to 10% self-foaming agent; and about 0.5 to 10% non-volatile paraffinic hydrocarbon fluid; said composition being substantially free of ionic material.
2. The shaving composition of claim 1 , wherein the emulsifier comprises a mixture of at least one ethoxylated C 14 -C 22 fatty alcohol with from 50 to 150 moles ethylene oxide per mole of fatty alcohol, and at least one ethoxylated C 12 -C 18 fatty alcohol with from 15 to 30 moles ethylene oxide per mole of fatty alcohol.
3. The shaving composition of claim 2 , wherein the at least one normally solid fatty alcohol comprises a C 14 -C 16 fatty alcohol.
4. The shaving composition of claim 3 , wherein the at least one normally solid fatty alcohol comprises myristyl alcohol.
5. The shaving composition of claim 2 , wherein the at least one normally solid fatty alcohol comprises a blend of myristyl alcohol and cetyl alcohol.
6. The shaving composition of claim 2 , which contains from 3 to 10% by weight of said at least one normally solid fatty alcohol.
7. The shaving composition of claim 2 , wherein the at least one ethoxylated C 14 -C 22 fatty alcohol with from 50 to 150 moles ethylene oxide per mole of fatty alcohol comprises ethoxylated stearyl alcohol, ethoxylated oleyl alcohol, ethoxylated myristyl alcohol or ethoxylated cetyl alcohol, with from 50 to 150 moles ethylene oxide per mole of fatty alcohol.
8. The shaving composition of claim 7 , wherein the at least one ethoxylated C 12 -C 18 fatty alcohol with from 15 to 30 moles ethylene oxide per mole of fatty alcohol comprises ethoxylated cetyl alcohol, ethoxylated oleyl alcohol, ethoxylated stearyl alcohol, or ethoxylated myristyl alcohol with from 15 to 30 moles ethylene oxide per mole of fatty alcohol.
9. The shaving composition of claim 2 , wherein the at least one ethoxylated C 14 -C 22 fatty alcohol with from 50 to 150 moles ethylene oxide per mole of fatty alcohol comprises an ethoxylated C 14 -C 22 fatty alcohol with from 75 to 125 moles ethylene oxide per mole of fatty alcohol.
10. The shaving composition of claim 9 , wherein the at least one ethoxylated C 12 -C 18 fatty alcohol with from 15 to 30 moles ethylene oxide per mole of fatty alcohol comprises an ethoxylated C 12 -C 18 fatty alcohol with from 17 to 25 moles ethylene oxide per mole of fatty alcohol.
11. The shaving composition of claim 2 , wherein the emulsifier comprises a mixture of steareth-100 and oleth-20, or a mixture of oleth100 and ceteth-20.
12. The shaving composition of claim 1 , which contains from 8 to 12% of said emulsifier.
13. The shaving composition of claim 1 , wherein the non-volatile paraffinic hydrocarbon fluid has about 20 to about 40 carbon atoms and a viscosity of about 10 to about 50 cs. at 40°C.
14. The shaving composition of claim 13 , wherein the non-volatile paraffinic hydrocarbon fluid is selected from the group consisting of mineral oils, branched-chain aliphatic liquids, and mixtures thereof.
15. The shaving composition of claim 1 , wherein the self-foaming agent is a volatile saturated aliphatic hydrocarbon having 4 to 6 carbon atoms, or a mixture of two or more such hydrocarbons.
16. The shaving composition of claim 1 , which additionally comprises a thickening agent selected from the group consisting of polyethylene oxide, polyacrylamide, hydroxyethyl cellulose, hydroxypropyl cellulose, and mixtures thereof.
17. The shaving composition of claim 1 , which comprises, in percent by weight, about 70 to 80% water; about 3 to 10% of one or more C 12 -C 18 water-insoluble normally solid fatty alcohols; from 8 to 12% of an emulsifier comprising from 2 to 8% (by weight of the composition) of an ethoxylated C 12 -C 18 fatty alcohol with about 75 to 125 moles of ethylene oxide per mole of fatty alcohol, and from 2 to 8% (by weight of the composition) of an ethoxylated C 12 -C 18 fatty alcohol with from 17 to 25 moles ethylene oxide per mole of fatty alcohol; about 1 to 8% self-foaming agent; and about 2 to 10% non-volatile paraffinic hydrocarbon fluid.
18. The shaving composition of claim 17 , which is substantially free of soaps (including interrupted soaps) and of anionic surfactants.
19. The shaving composition of claim 18 , which contains up to 1% by weight of a cationic skin conditioning agent.
20. An aerosol dispenser containing a substantially non-ionic shaving composition as claimed in claim 1 .