Aerosol stain-removing composition

Claim 1

A sprayable aerosol stain-removing composition for removing stains from a surface, said composition contained under pressure in a container therefor and comprising a. a propellant selected from the group consisting of propane, isobutane, n-butane, trichloromonofluoromethane, dichlorodifluoromethane, dichloromonofluoromethane, monochlorodifluoromethane, 1,2-dichloro 1,1,2,2-tetrafluoroethane, 1,1-dichloro 1,2,2,2-tetrafluoroethane, 1-chloro 1,1-difluoroethane and mixtures thereof, b. a stain-removing liquid agent selected from the group consisting of trichloroethylene, essence of turpentine, methylene chloride, carbon tetrachloride, tetrachloroethylene, naphtha, benzene and mixtures thereof said (b) stain-removing liquid agent being dispersed unencapsulated by itself in said (a) propellant, and without any (c) finely-divided solid stain absorbent and c. a finely-divided solid stain absorbent selected from the group consisting of silicon powder and talcum powder, said solid stain absorbent (c) being encapsulated by itself and without any (b) stain removing liquid agent in a microcapsule having a diameter ranging from about 50 to 800 microns, said microcapsule being made from a polymeric material inert with respect to said stain-removing agent and said propellant and being impermeable to the propellant so that the pressure within said microcapsule is essentially equal to ambient pressure whereby on discharge of the microcapsule from said container onto a surface containing a stain to be removed at ambient pressure, said microcapsule remains intact, with the further proviso that some of said liquid stain removing agent may also be encapsulated in a microcapsule made of a polymeric material which is permeable to said propellant so that the pressure within said micro-capsule is essentially equal to the pressure within said container and is greater than atmospheric pressure whereby on discharge of the microcapsule from said container onto a surface containing a stain to be removed at ambient pressure, said microcapsule bursts, thereby releasing said stain-removing agent whereby although sprayed at the same time, the action of the unencapsuLated liquid stain remover is immediate and desirably separate in time from the encapsulated solid absorbent, thereby limiting any interference that might be occasioned by the copresence of the absorbent, said absorbent being freed from the microcapsule by rubbing the surface at the sopt where the stain was located and the aerosol was sprayed.