Aerosol foams

Claim 2

An aerosol shaving foam dispenser containing therein an aqueous soap-free surfactant concentrate, and emulsified or readily emulsifiable therewith, a gaseous aerosol propellant in liquid phase, said concentrate consisting essentially of water and (i) from 1-15% of a nitrogen-containing surfactant selected from the group consisting of: ##STR6## where R is a straight chain C 12 -C 18 alkyl group and p and q are both positive integers of from 1-30 and totalling from 10-30; ##STR7## wherein R is a straight chain C 12 -C 18 alkyl group and n is an integer of from 3-9; ##STR8## where R' is a straight chain C 12 -C 14 alkyl group; ##STR9## where R is a straight chain C 12 -C 18 alkyl group; and ##STR10## where R" is a straight chain C 11 -C 17 alkyl group, each R'" is a C 1 -C 3 alkyl group, Z is a --CH 2 -- or --CH 2 CONH(CH 2 ) x -- group, where x is an integer of from 2-5, and t is an integer of from 2-5; and (ii) from 0.5-6% by weight of the concentrate of a water-insoluble long chain fatty alcohol containing from 12-18 carbon atoms; the combined HLB value of the components (i) and (ii) in said concentrate being in the range 8-18 and the weight ratio of said nitrogen-containing surfactant to long chain fatty alcohol being in the range 0.5:1 to 12:1.

Claim 3

A dispenser according to claim 1, wherein the long chain fatty alcohol is tetradecanol.

Claim 4

A dispenser according to claim 1, in which the aqueous surfactant concentrate contains from 4-10% of the nitrogen surfactant and from 1-3% of long chain alcohol, and the weight ratio of components (i) and (ii) is in the range 2:1 to 6:1.

Claim 5

A dispenser according to claim 3, wherein the long chain fatty alcohol is tetradecanol.

Claim 6

An aerosol foam dispenser containing therein an aqueous soap-free surfactant concentrate, and emulsified or readily emulsifiable therewith, a gaseous aerosol propellant in liquid phase, said concentrate consisting essentially of water and (i) from 1-15% by weight of the concentrate of a water-soluble nitrogen-containing surfactant selected from the group consisting of: ##STR11## where R is a straight chain C 12 -C 18 alkyl group and p and q are both positive integers of from 1-30 and totalling from 10-30; ##STR12## where R is a straight chain C 12 -C 18 alkyl group and n is an integer of from 3-9; ##STR13## where R' is a straight chain C 12 -C 14 alkyl group; ##STR14## where R is a straight chain C 12 -C 18 alkyl group; and ##STR15## where R" is a straight chain C 11 -C 17 alkyl group, each R'" is a C 1 -C 3 alkyl group, Z is a --CH 2 -- or --CH 2 CONH(CH) x -- group, where x is an integer of from 2-5, and t is an integer of from 2-5; (ii) from 0.5-6% by weight of the concentrate of a water-insoluble long chain fatty alcohol containing from 12-18 carbon atoms; and (iii) up to 15% by weight of the concentrate of adducts of a C 12 -C 18 fatty alcohol with 10-30 moles of ethylene oxide, nonyl phenoxypolyoxyethylene (50) ethanol, and polyoxyethylene (20) sorbitan monostearate, the HLB value of components (i), (ii) and (iii) being in the range 8-18 and the weight ratio of components (i) and (iii) to component (ii) being in the range 0.5:1 to 12:1.

Claim 7

An aerosol foam dispenser containing therein an aqueous soap-free surfactant concentrate, and emulsified or readily emulsifiable therewith, a gaseous aerosol propellant in liquid phase, said concentrate consisting essentially of water and (i) from 1-15% by weight of the concentrate of a water-soluble nitrogen-containing surfactant selected from the group consisting of: ##STR11## where R is a straight chain C 12 -C 18 alkyl group and p and q are both positive integers of from 1-30 and totalling from 10-30; ##STR12## where R is a straight chain C 12 -C 18 alkyl group and n is an integer of from 3-9; ##STR13## where R' is a straight chain C 12 -C 14 alkyl group; ##STR14## where R is a straight chain C 12 -C 18 alkyl group; and ##STR15## where R" is a straight chain C 11 -C 17 alkyl group, each R'" is a C 1 -C 3 alkyl group, Z is a --CH 2 -- or --CH 2 CONH(CH) x -- group, where x is an integer of from 2-5, and t is an integer of from 2-5; (ii) from 0.5-6% by weight of the concentrate of a water-insoluble long chain fatty alcohol containing from 12-18 carbon atoms; and (iii) up to 15% by weight of the concentrate of adducts of a C 12 -C 18 fatty alcohol with 10-30 moles of ethylene oxide, nonyl phenoxypolyoxyethylene (50) ethanol, and polyoxyethylene (20) sorbitan monostearate, the HLB value of components (i), (ii) and (iii) being in the range 8-18 and the weight ratio of components (i) and (iii) to component (ii) being in the range 0.5:1 to 12:1.

Claim 8

A dispenser according to claim 5, wherein the long chain fatty alcohol is tetradecanol.