Foamable aerosol preparation
AssigneeHisamitsu Pharmaceutical Co., Inc.
InventorsAkira Nakagawa, Satoru Miyata, Kenji Masuda
Life of this patent
Estimating the term…
Abstract
A foamable aerosol preparation for use as the base of cosmetics, quasi drugs, drugs, and so forth, which comprises 0.1 to 5 w/v % of a surfactant, 0.05 to 10 w/v % of a lower alcohol and/or a glycol, 3 to 25 w/v % of water, and 60 to 95 w/v % of n-butane gas. Despite of the use of n-butane gas as the propellant, this preparation foams very well and is excellent in cracking sound when applied to skin. Furthermore it is particularly useful from the viewpoint of environmental protection, because it is free from the problem of the depletion of the ozonosphere by virtue of the use of a liquefied petroleum gas as the propellant instead of fluorocarbon gas heretofore used.
Claims10
A foamable aerosol preparation comprising 0.1 to 5 wt./vol. % of at least one surfactant which is a member selected from the group consisting of polyoxyethylene octyl phenyl ether and sodium polyoxyethylene lauryl ether sulfate and mixtures thereof, 0.05 to 10 wt./vol. % of at least one member selected from the group consisting of ethanol, isopropanol, propylene glycol, 1,3-butanediol, 3-methyl-1,3-butanediol, dipropylene glycol, tripropylene glycol, glycerin, polyoxyethylene polyoxypropylene glycol and polyethylene glycol;
- 3 to 25 wt./vol. % of water and 60 to 95 wt./vol. % of n-butane gas.
A foamable aerosol preparation comprising (i) a base which comprises 0.1 to 5 wt./vol. % of at least one surfactant selected from the group consisting of polyoxyethylene octylphenyl ether and sodium polyoxyethylene lauryl ether sulfate and mixtures thereof, 0.05 to 10 wt./vol. % of at least one member selected from the group consisting of ethanol, isopropanol, propylene glycol, 1,3-butanediol, 3-methyl-1,3-butanediol, dipropylene glycol, tripropylene glycol, glycerin, polyoxyethylene polyoxypropylene glycol and polyethylene glycol;
- 3 to 25 wt./vol. % of water and 60 to 95 wt./vol. % of n-butane gas;
- and (ii) an active ingredient.
Dependencies are inferred from the claim text.