US3679102A - Aerosol composition and method for producing same - Google Patents
Aerosol composition and method for producing same Download PDFInfo
- Publication number
- US3679102A US3679102A US8726A US3679102DA US3679102A US 3679102 A US3679102 A US 3679102A US 8726 A US8726 A US 8726A US 3679102D A US3679102D A US 3679102DA US 3679102 A US3679102 A US 3679102A
- Authority
- US
- United States
- Prior art keywords
- microcapsules
- liquefied
- aerosol
- propellant
- dispenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/025—Applications of microcapsules not provided for in other subclasses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/20—After-treatment of capsule walls, e.g. hardening
- B01J13/203—Exchange of core-forming material by diffusion through the capsule wall
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S206/00—Special receptacle or package
- Y10S206/828—Medicinal content
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
- Y10T428/2985—Solid-walled microcapsule from synthetic polymer
- Y10T428/2987—Addition polymer from unsaturated monomers only
Definitions
- a sprayable aerosol composltwn 15 prepared ye a q 5s 1 Field of Search ..424/14, 4547; a material in a microcapsule and introduclns Into said 252/305, 316 364; 401/132, 190; 222/192, 394 microcapsule a fluid under a pressure essentially equal to the pressure in the aerosol container from which said composition 56]
- References Cited is dispensed, Also provided is an aerosol dispenser containing UNITED STATES PATENTS 11/1970 Monson ..252/
- microcapsules dispersed in an aerosol propellant.
- This invention relates to a method for producing a sprayable aerosol composition containing a self-releasable encapsulated material and to an aerosol dispenser containing said encapsulated material dispersed in a propellant.
- the present invention relates to the production of an aerosol composition containing an encapsulated material which can be released therefrom without the need of mechanical, chemical or thermal means.
- the present invention has been found to be particularly use ful in the cosmetic and pharmaceutical industry and in the packaging of maintenance products, for projecting active ingredients onto the surface where they are to act, and to obtain automatic liberation of these ingredients on the said support.
- the present invention is a method for producing a sprayable aerosol composition containing a self-releasable encapsulated material which comprises encapsulating the material to be sprayed in the form of an aerosol in a rupturable microcapsule having a size ranging from about 50 to 1000 microns in diameter and introducing into said microcapsule a fluid under sufficient pressure so that when said microcapsule, dispersed in an aerosol propellant, is sprayed into an atmosphere having a pressure less than the pressure of the fluid in said microcap sule, the microcapsule ruptures, thereby releasing the material contained therein.
- the propellant in which the microcapsules are dispersed and stored and the fluid contained in the microcapsules under pressure are essentially the same.
- this fluid and propellant can conveniently be a fluorinated hydrocarbon and particularly a fluorochloroalkane such as trichlorofluoromethane and dichlorofluoromethane or their mixtures.
- the propellant can be a saturated aliphatic hydrocarbon such as propane, isobutane, n-butane or the like.
- the aerosol dispenser in which the propellant and microcapsules are packaged will have a valve provided with a diaphragm, having a diameter greater than the maximum diameter of the microcapsules.
- a fluid having sufficient pressure to rupture the micro-capsule when sprayed into the atmosphere is introduced into the microcapsule in the liquid state in admixture with the material to be released therefrom on rupturing.
- microencapsulation is carried out at a sufficiently low temperature and pressure so that the fluid is in the liquid.
- the material being encapsulated is itself a liquid, it must be miscible with the liquified pressuring medium, especially when the releasable material is an alcohol solution, and the liquified pressuring medium gas is a mixture of fluorochloroalkanes.
- the material to be released is initially microencapsulated in the absence of any pressurizing medium, and the micro-capsules are then placed in an atmosphere of the desired pressurizing medium at a pressure sufficient for the said pressurizing medium to permeate the microcapsule walls in a time ranging from a few minutes to a few days.
- the present invention is also related to an aerosol dispenser containing a suitable propellant and the microcapsules defined above.
- a suitable propellant and the microcapsules defined above.
- microcapsules used in the present invention can be made of any conventionally employed material in the microencapsulation field.
- polymeric materials to produce the microcapsules are such polymers as polyvinyl alcohol, polyethylene, polypropylene, polystyrene, polyacrylamides, polyethers, polyesters, polyamides, polybutadiene, polyisoprene, epoxy resins, polyurethanes, ethylcellulose, carboxymethylcellulose and the like.
- the microcapsules are made from a thermoplastic polymer such as low melting polyethylene; the latter is particularly applicable when the pressurizing gas is a mixture of fluorochloroalkanes and when this mixture of fluorochloroalkanes is introduced into the microcapsules by using the permeability characteristics of the wall.
- a thermoplastic polymer such as low melting polyethylene
- the nature of the walls will generally be chosen for its compatibility with the propellant in which the microcapsules are placed.
- the ratio of the weight of the wall to the total weight of the filled microcapsule ranges between 3l0: l 00.
- microcapsule fabrication Any convenient technique of microcapsule fabrication can be used, particularly microencapsulation by mechanical means such as centrifugal microencapsulation.
- droplets of the material to be encapsulated are formed by the centrifugal force of a turntable which then traverse by means of the velocity which they thus acquire, a thin film of fluid product designed to form the wall of the microcapsule.
- a conventional wall-hardening treatment can be employed which, in the case where the wall is prepared from a thermoplastic material, can simply be a sudden cooling of the microcapsules formed.
- Representative suitable microencapsulation operations can be found in the literature, for instance in U.S. Pat. No. 3,015,128.
- the material encapsulated in the microcapsules can be, for instance, such cosmetic preparations as hair dyes, bleaches, dressing composition or the like, pharmaceutical preparations including antiseptics, topical anesthetics, or such products as stain-removing agents, finely divided solid inorganic absorbents such as talc and the like.
- microencapsulated liquid has the following composition:
- microcapsules thus formed are placed in a atmosphere of a fluorochloralkane at a relative pressure of 1.5 kglcm This pressure is maintained for several days, after which the microcapsules are transferred, the external pressure being kept the same, to a liquid medium compatible with the wall, such as, for example, trichlorofluoromethane, dichlorodifluoromethane, or dichlorotetrafluoromethane.
- a liquid medium compatible with the wall such as, for example, trichlorofluoromethane, dichlorodifluoromethane, or dichlorotetrafluoromethane.
- the liquid medium containing the microcapsules is then placed in a pressurized aerosol can type container at a pressure above 1.5 kg/cm by means of a fluorochloroalkane.
- the liquid present in the pressurized container is dispensed directly onto hair to be dyed by the action of the container valve; the diaphragm associated with the valve having an aperture 1 mm in diameter.
- An oxidant is added to the dye thus placed on the hair.
- an oxidant can be included in the propellant. After minutes, a chestnut brown coloration is obtained on 70 percent white hair.
- An aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom and containing a propellant under pressure and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with and permeable to said aerosol propellant and having a size ranging from about 50 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are packaged; said fluid encapsulated in said microcapsules under pressure and said propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-
- An aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom and containing a propellant under pressure and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with said aerosol propellant and having a size ranging from about 50 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are packaged; said fluid encapsulated in said microcapsules under pressure and said propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixture
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cosmetics (AREA)
- Medicinal Preparation (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
A sprayable aerosol composition is prepared by encapsulating a material in a microcapsule and introducing into said microcapsule a fluid under a pressure essentially equal to the pressure in the aerosol container from which said composition is dispensed. Also provided is an aerosol dispenser containing under pressure said microcapsules dispersed in an aerosol propellant.
Description
I United States Patent 1151 3,679,102 Charle et al. 1451 July 25, 1972 AEROSOL COMPOSITION AND 3,265,630 8 1966 Jensen ..252/316 METHOD FOR PRODUCING SA 2,959,325 11/1960 Beard ..222/1 3,081,223 3/1963 Gunning et al. 252/305 x 1 Inventors Chris, 7; Gregoire lwonimis, 2,980,941 4/1961 Miller /10493 Pans; C r es i a c n all of 3,196,478 7/1965 Baymiller.... ..401/132 France 3,334,374 8/1967 Watkins ..401/196 3,334,790 8/1967 Baton ..222/107 [73] Ass'gnee' L Pans France 3,441,353 4/1969 Clapp ..401/132 22 Filed: Feb. 4, 1970 3,464,413 9/1969 Goldfarb 131.... ..128/268 3,472,675 10/1969 Gordon et a1 ..117 36.9 [21] APPL 8772 3,516,846 6/1970 Matson ..117/362 Foreign Application Priority um OTHER PQPUCATIONS a 7, n Miles 1. M. et al., J. Soc. Cosmet. Chem 22: 655-666 (Sept. Feb. 4, 1969 Luxembourg ..57.891 17, 1971) Encapsulated Perfumesin Aerosol Producm" """151/17;"161735619275422222#531133 P'immEmmim-shefi-Rose I Y 1 An -Ch ,Db&Csha 206/42, 206/56, 206/84, 264/4, 252/305, 252/316, ar y u m 252/364, 401/132, 401/190, 424/45, 424/47, 57 ABSTRACT 424/62, 424 69, 424/ 51 1 1m. (:1 ..A61j 3/00, A6lk 7/12 A sprayable aerosol composltwn 15 prepared ye a q 5s 1 Field of Search ..424/14, 4547; a material in a microcapsule and introduclns Into said 252/305, 316 364; 401/132, 190; 222/192, 394 microcapsule a fluid under a pressure essentially equal to the pressure in the aerosol container from which said composition 56] References Cited is dispensed, Also provided is an aerosol dispenser containing UNITED STATES PATENTS 11/1970 Monson ..252/
under pressure said microcapsules dispersed in an aerosol propellant.
4 Claims, No Drawings AEROSOL COMPOSITION AND METHOD FOR PRODUCING SAME This invention relates to a method for producing a sprayable aerosol composition containing a self-releasable encapsulated material and to an aerosol dispenser containing said encapsulated material dispersed in a propellant.
More particularly, the present invention relates to the production of an aerosol composition containing an encapsulated material which can be released therefrom without the need of mechanical, chemical or thermal means.
The present invention has been found to be particularly use ful in the cosmetic and pharmaceutical industry and in the packaging of maintenance products, for projecting active ingredients onto the surface where they are to act, and to obtain automatic liberation of these ingredients on the said support.
The present invention is a method for producing a sprayable aerosol composition containing a self-releasable encapsulated material which comprises encapsulating the material to be sprayed in the form of an aerosol in a rupturable microcapsule having a size ranging from about 50 to 1000 microns in diameter and introducing into said microcapsule a fluid under sufficient pressure so that when said microcapsule, dispersed in an aerosol propellant, is sprayed into an atmosphere having a pressure less than the pressure of the fluid in said microcap sule, the microcapsule ruptures, thereby releasing the material contained therein.
Preferably, in the present invention the propellant in which the microcapsules are dispersed and stored and the fluid contained in the microcapsules under pressure are essentially the same. Thus, this fluid and propellant can conveniently be a fluorinated hydrocarbon and particularly a fluorochloroalkane such as trichlorofluoromethane and dichlorofluoromethane or their mixtures. Moreover, the propellant can be a saturated aliphatic hydrocarbon such as propane, isobutane, n-butane or the like. The aerosol dispenser in which the propellant and microcapsules are packaged will have a valve provided with a diaphragm, having a diameter greater than the maximum diameter of the microcapsules.
In one embodiment of the present invention, a fluid having sufficient pressure to rupture the micro-capsule when sprayed into the atmosphere is introduced into the microcapsule in the liquid state in admixture with the material to be released therefrom on rupturing. In this case, microencapsulation is carried out at a sufficiently low temperature and pressure so that the fluid is in the liquid. When the material being encapsulated is itself a liquid, it must be miscible with the liquified pressuring medium, especially when the releasable material is an alcohol solution, and the liquified pressuring medium gas is a mixture of fluorochloroalkanes.
In another embodiment of the present invention, the material to be released is initially microencapsulated in the absence of any pressurizing medium, and the micro-capsules are then placed in an atmosphere of the desired pressurizing medium at a pressure sufficient for the said pressurizing medium to permeate the microcapsule walls in a time ranging from a few minutes to a few days.
The present invention is also related to an aerosol dispenser containing a suitable propellant and the microcapsules defined above. Thus, when these components are sprayed from the pressurized dispenser, it will be evident that when the user depresses the valve of the dispenser, the microcapsules, having dispersed therein the propellant having an internal pressure at least equal to the pressure of the propellant in the dispenser but greater than the atmosphere into which they are sprayed will rupture as soon as they come in contact with the atmosphere. Packaging will thus be achieved in which the microcapsules exist during storage and which do not have to be destroyed by any independent action of the user at the time of dispensing the same onto the desired surface.
The microcapsules used in the present invention can be made of any conventionally employed material in the microencapsulation field. Representative of polymeric materials to produce the microcapsules are such polymers as polyvinyl alcohol, polyethylene, polypropylene, polystyrene, polyacrylamides, polyethers, polyesters, polyamides, polybutadiene, polyisoprene, epoxy resins, polyurethanes, ethylcellulose, carboxymethylcellulose and the like. Preferably, the microcapsules are made from a thermoplastic polymer such as low melting polyethylene; the latter is particularly applicable when the pressurizing gas is a mixture of fluorochloroalkanes and when this mixture of fluorochloroalkanes is introduced into the microcapsules by using the permeability characteristics of the wall. The nature of the walls will generally be chosen for its compatibility with the propellant in which the microcapsules are placed. Generally, the ratio of the weight of the wall to the total weight of the filled microcapsule ranges between 3l0: l 00.
Any convenient technique of microcapsule fabrication can be used, particularly microencapsulation by mechanical means such as centrifugal microencapsulation. In this method droplets of the material to be encapsulated are formed by the centrifugal force of a turntable which then traverse by means of the velocity which they thus acquire, a thin film of fluid product designed to form the wall of the microcapsule. A conventional wall-hardening treatment can be employed which, in the case where the wall is prepared from a thermoplastic material, can simply be a sudden cooling of the microcapsules formed. Representative suitable microencapsulation operations can be found in the literature, for instance in U.S. Pat. No. 3,015,128.
The material encapsulated in the microcapsules can be, for instance, such cosmetic preparations as hair dyes, bleaches, dressing composition or the like, pharmaceutical preparations including antiseptics, topical anesthetics, or such products as stain-removing agents, finely divided solid inorganic absorbents such as talc and the like.
In order to gain a better understanding of the invention, the following example is provided.
EXAMPLE Mechanical centrifuging is used to prepare microcapsules with average dimensions of approximately 400 microns from low melting polyethylene. The microencapsulated liquid has the following composition:
nonylphenol condensed with 4 molecules The microcapsules thus formed are placed in a atmosphere of a fluorochloralkane at a relative pressure of 1.5 kglcm This pressure is maintained for several days, after which the microcapsules are transferred, the external pressure being kept the same, to a liquid medium compatible with the wall, such as, for example, trichlorofluoromethane, dichlorodifluoromethane, or dichlorotetrafluoromethane. The liquid medium containing the microcapsules is then placed in a pressurized aerosol can type container at a pressure above 1.5 kg/cm by means of a fluorochloroalkane. The liquid present in the pressurized container is dispensed directly onto hair to be dyed by the action of the container valve; the diaphragm associated with the valve having an aperture 1 mm in diameter. An oxidant is added to the dye thus placed on the hair. Alternatively, an oxidant can be included in the propellant. After minutes, a chestnut brown coloration is obtained on 70 percent white hair.
What is claimed is:
1. An aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom and containing a propellant under pressure and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with and permeable to said aerosol propellant and having a size ranging from about 50 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are packaged; said fluid encapsulated in said microcapsules under pressure and said propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium and the internal pressure of said microcapsules containing said liquid cosmetic or pharmaceutical material and said liquefied pressuring medium being essentially equal to the pressure of said propellant in said dispenser but greater than the atmosphere into which said microcapsules are to be sprayed so that said microcapsules without any independent action of the user upon actuating the valve of the dispenser to discharge said microcapsules into the atmosphere through the valve of the dispenser, rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
2. An aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom and containing a propellant under pressure and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with said aerosol propellant and having a size ranging from about 50 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are packaged; said fluid encapsulated in said microcapsules under pressure and said propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium and the internal pressure of said microcapsules containing said liquid cosmetic or pharmaceutical material and said liquefied pressuring medium being essentially equal to the pressure of said propellant in said dispenser but greater than the atmosphere into which said microcapsules are to be sprayed so that said microcapsules without any independent action of the user upon actuating the valve of the dispenser to discharge said microcapsules into the atmosphere through the valve of the dispenser, rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
3. A method for producing and dispensing a sprayable aerosol composition contained under pressure in an aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom into an atmosphere having a pressure less than the pressure in said aerosol dispenser, said composition comprising an aerosol propellant and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with and permeable to said aerosol propellant and having a size ranging from about 50 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are contained, the steps comprising microencapsulating said liquid cosmetic or pharmaceutical material in said microcapsules; placing said microcapsules in an atmosphere containing said fluid at a pressure sufficient for said fluid to permeate the microcapsule walls so that fluid is contained within said microcapsules as a liquid to provide a liquefied encapsulated pressuring medium; dispersing at said pressure the resulting microcapsules containing said liquid cosmetic or pharmaceutical material and liquefied pressuring medium in an aerosol propellant, liquefied pressuring medium and said aerosol propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium; and confining under pressure said microcapsules, containing said liquefied cosmetic or pharmaceutical material and liquefied pressuring medium, dispersed in said aerosol propellant in said aerosol dispenser, the internal pressure of said microcapsules containing said liquefied cosmetic or pharmaceutical material and said liquefied pressuring medium being essentially equal to the pressure of said aerosol propellant in said dispenser but greater than the atmosphere into which said microcapsules are to be sprayed so that said microcapsules without any independent action of the user upon actuating the valve of the dispenser rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
4. A method for producing and dispensing a sprayable aerosol composition contained under pressure in an aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom into an atmosphere having a pressure less than the pressure in said aerosol dispenser, said composition comprising an aerosol propellant and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with said aerosol propellant and having a size ranging from about 50 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are contained, the steps comprising microencapsulating said liquid cosmetic or pharmaceutical material in admixture with said fluid in said microcapsules at a sufiiciently low temperature and at a pressure so that said fluid provides a liquefied pressuring medium encapsulated therein; dispersing the resulting microcapsules, containing said liquid cosmetic or pharmaceutical material and liquefied pressuring medium, in an aerosol propellant, said liquefied pressuring medium and said aerosol propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium; and confining, under pressure, said microcapsules, containing said liquid cosmetic or pharmaceutical material and liquefied pressuring medium, dispersed in said aerosol propellant in said aerosol dispenser, the internal pressure of said microcapsules containing said liquid cosmetic or pharmaceutical material and said liquefied said microcapsules into the atmosphere through the valve of the dispenser, rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
Claims (3)
- 2. An aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom and containing a propellant under pressure and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with said aerosol propellant and having a size ranging from about 50 - 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are packaged; said fluid encapsulated in said microcapsules under pressure and said propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium and the internal pressure of said microcapsules containing said liquid cosmetic or pharmaceutical material and said liquefied pressuring medium being essentially equal to the pressure of said propellant in said dispenser but greater than the atmosphere into which said microcapsules are to be sprayed so that said microcapsules without any independent action of the user upon actuating the valve of the dispenser to discharge said microcapsules into the atmosphere through the valve of the dispenser, rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
- 3. A method for producing and dispensing a sprayable aerosol composition contained under pressure in an aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom into an atmosphere having a pressure less than the pressure in said aerosol dispenser, said composition comprising an aerosol propellant and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with and permeable to said aerosol propellant and having a size ranging from about 50 - 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are contained, the steps comprising microencapsulating said liquid cosmetic or pharmaceutical material in said microcapsules; placing said microcapsules in an atmosphere containing said fluid at a pressure sufficient for said fluid to permeate the microcapsule walls so that fluid is contained within said microcapsules as a liquid to provide a liquefied encapsulated pressuring medium; dispersing at said pressure the resulting microcapsules containing said liquid cosmetic or pharmaceutical material and liquefied pressuring medium in an aerosol propellant, liquefied pressuring medium and said aerosol propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium; and confining under pressure said microcapsules, containing said liquefied cosmetic or pharmaceutical material and liquefied pressuring medium, dispersed in said aerosol propellant in said aerosol dispenser, the internal pressure of said microcapsules containing said liquefied cosmetic or pharmaceutical material and said liquefied pressuring medium being essentially equal to the pressure of said aerosol propellant in said dispenser but greater than the atmosphere into which said microcapsules are to be sprayed so that said microcapsules without any independent action of the useR upon actuating the valve of the dispenser rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
- 4. A method for producing and dispensing a sprayable aerosol composition contained under pressure in an aerosol dispenser provided with a valve through which the contents thereof are discharged therefrom into an atmosphere having a pressure less than the pressure in said aerosol dispenser, said composition comprising an aerosol propellant and sprayable microcapsules dispersed therein, said microcapsules encapsulating a liquid cosmetic or pharmaceutical material and a fluid under pressure to provide a liquefied encapsulated pressuring medium, said microcapsules having walls compatible with said aerosol propellant and having a size ranging from about 50 - 1000 microns in diameter and being less than the diameter of the valve of said aerosol dispenser in which said propellant and microcapsules are contained, the steps comprising microencapsulating said liquid cosmetic or pharmaceutical material in admixture with said fluid in said microcapsules at a sufficiently low temperature and at a pressure so that said fluid provides a liquefied pressuring medium encapsulated therein; dispersing the resulting microcapsules, containing said liquid cosmetic or pharmaceutical material and liquefied pressuring medium, in an aerosol propellant, said liquefied pressuring medium and said aerosol propellant in which said microcapsules are dispersed and stored being essentially the same and comprising a liquefied gas of a fluorinated hydrocarbon selected from the group consisting of trichlorofluoromethane, dichlorofluoromethane and mixtures thereof or a saturated aliphatic hydrocarbon selected from the group consisting of propane, isobutane, n-butane and mixtures thereof, said liquid cosmetic or pharmaceutical material being miscible with said liquefied pressuring medium; and confining, under pressure, said microcapsules, containing said liquid cosmetic or pharmaceutical material and liquefied pressuring medium, dispersed in said aerosol propellant in said aerosol dispenser, the internal pressure of said microcapsules containing said liquid cosmetic or pharmaceutical material and said liquefied pressuring medium being essentially equal to the pressure of said aerosol propellant in said dispenser but greater than the atmosphere into which said microcapsules are to be sprayed so that said microcapsules without any independent action of the user upon actuating the valve of the dispenser to discharge said microcapsules into the atmosphere through the valve of the dispenser, rupture as soon as said microcapsules come into contact with the atmosphere thereby releasing said liquid cosmetic or pharmaceutical material therefrom.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU57891 | 1969-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3679102A true US3679102A (en) | 1972-07-25 |
Family
ID=19725896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US8726A Expired - Lifetime US3679102A (en) | 1969-02-04 | 1970-02-04 | Aerosol composition and method for producing same |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3679102A (en) |
| BE (1) | BE744920A (en) |
| CH (1) | CH520529A (en) |
| DE (1) | DE2005075A1 (en) |
| FR (1) | FR2033287A1 (en) |
| GB (1) | GB1295036A (en) |
| LU (1) | LU57891A1 (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3839220A (en) * | 1968-10-23 | 1974-10-01 | Mennen Co | Microcapsules for use in pressurized systems |
| US3918452A (en) * | 1974-08-01 | 1975-11-11 | Edward Cornfeld | Tampons impregnated with contraceptive compositions |
| US4147766A (en) * | 1976-06-09 | 1979-04-03 | Armour Pharmaceutical Company | Macrospherical particles of anti-perspirants |
| US4149551A (en) * | 1977-03-28 | 1979-04-17 | The Procter & Gamble Company | Method of conditioning hair using a flexible substrate |
| US4183911A (en) * | 1973-09-18 | 1980-01-15 | Colgate-Palmolive Company | Antiperspirant compositions |
| US4220447A (en) * | 1971-07-29 | 1980-09-02 | L'oreal | Solid, frozen stabilized hair dye |
| US4247537A (en) * | 1977-11-09 | 1981-01-27 | Lunn Peter F R | Bleaching systems comprising percarbonate, persulfate, and pyrogenic silica |
| US4439343A (en) * | 1979-07-23 | 1984-03-27 | United Industries Corporation | Aerosol preparation |
| US4439342A (en) * | 1979-07-23 | 1984-03-27 | United Industries Corporation | Aerosol preparation |
| US4608211A (en) * | 1983-03-22 | 1986-08-26 | L'oreal | Process for preparing lipid vesicles by vaporisation of solvents |
| US4635651A (en) * | 1980-08-29 | 1987-01-13 | Jacobs Allen W | Process for the inclusion of a solid particulate component into aerosol formulations of inhalable nicotine |
| US4941615A (en) * | 1988-10-03 | 1990-07-17 | Bolduc Lee R | Aerosol dispenser |
| US4979638A (en) * | 1987-05-14 | 1990-12-25 | Bolduc Lee R | Aerosol dispenser with sealed actuator |
| US5012978A (en) * | 1988-10-03 | 1991-05-07 | Bolduc Lee R | Aerosol dispenser and method |
| US5018643A (en) * | 1987-05-14 | 1991-05-28 | Bolduc Lee R | Aerosol dispenser with sealed actuator and aerosol dispensing method |
| US5052585A (en) * | 1988-10-24 | 1991-10-01 | Bolduc Lee R | Dispenser |
| US5061106A (en) * | 1988-03-08 | 1991-10-29 | Colgate-Palmolive Company | Toothbrush with slow release of disinfectant and antibacterial agents and method of manufacturing the same |
| US5064121A (en) * | 1988-10-03 | 1991-11-12 | Bolduc Lee R | Dispenser |
| US5858343A (en) * | 1997-01-31 | 1999-01-12 | S. C. Johnson & Son, Inc. | Post-foaming shaving gel including poly(ethylene oxide) and polyvinylpyrrolidone in a preferred range of weight ratios |
| US6102036A (en) * | 1994-04-12 | 2000-08-15 | Smoke-Stop | Breath activated inhaler |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2335818A1 (en) * | 2009-07-09 | 2011-06-22 | Altachem Holdings NV | Leach-proof microcapsules, the method for preparation and use of leach-proof microcapsules |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2959325A (en) * | 1954-04-29 | 1960-11-08 | Risdon Mfg Co | Method and apparatus for dispensing dry powders |
| US2980941A (en) * | 1958-12-08 | 1961-04-25 | Ncr Co | Cleaning sheet |
| US3081223A (en) * | 1961-07-19 | 1963-03-12 | Union Carbide Corp | Self-propelled powder aerosol system |
| US3196478A (en) * | 1963-05-02 | 1965-07-27 | Armstrong Cork Co | Applier |
| US3265630A (en) * | 1958-12-22 | 1966-08-09 | Ncr Co | Encapsulating lipophilic material by coacervation |
| US3334374A (en) * | 1964-12-28 | 1967-08-08 | Minnesota Mining & Mfg | Applicator pad |
| US3334790A (en) * | 1966-05-17 | 1967-08-08 | Armstrong Cork Co | Package for dispensing liquids |
| US3441353A (en) * | 1967-01-31 | 1969-04-29 | Claff Clarence L | Perfume dispenser |
| US3464413A (en) * | 1967-05-26 | 1969-09-02 | United Merchants & Mfg | Medical bandages |
| US3472675A (en) * | 1966-01-27 | 1969-10-14 | Ncr Co | Pressure-sensitive capsule-containing foraminated sheet material |
| US3516846A (en) * | 1969-11-18 | 1970-06-23 | Minnesota Mining & Mfg | Microcapsule-containing paper |
| US3541581A (en) * | 1967-11-13 | 1970-11-17 | Johnson & Son Inc S C | Package containing a post-foaming gel |
-
1969
- 1969-02-04 LU LU57891D patent/LU57891A1/xx unknown
-
1970
- 1970-01-26 BE BE744920D patent/BE744920A/xx unknown
- 1970-01-30 FR FR7003329A patent/FR2033287A1/fr not_active Withdrawn
- 1970-02-02 CH CH152770A patent/CH520529A/en not_active IP Right Cessation
- 1970-02-04 US US8726A patent/US3679102A/en not_active Expired - Lifetime
- 1970-02-04 DE DE19702005075 patent/DE2005075A1/en active Pending
- 1970-02-04 GB GB1295036D patent/GB1295036A/en not_active Expired
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2959325A (en) * | 1954-04-29 | 1960-11-08 | Risdon Mfg Co | Method and apparatus for dispensing dry powders |
| US2980941A (en) * | 1958-12-08 | 1961-04-25 | Ncr Co | Cleaning sheet |
| US3265630A (en) * | 1958-12-22 | 1966-08-09 | Ncr Co | Encapsulating lipophilic material by coacervation |
| US3081223A (en) * | 1961-07-19 | 1963-03-12 | Union Carbide Corp | Self-propelled powder aerosol system |
| US3196478A (en) * | 1963-05-02 | 1965-07-27 | Armstrong Cork Co | Applier |
| US3334374A (en) * | 1964-12-28 | 1967-08-08 | Minnesota Mining & Mfg | Applicator pad |
| US3472675A (en) * | 1966-01-27 | 1969-10-14 | Ncr Co | Pressure-sensitive capsule-containing foraminated sheet material |
| US3334790A (en) * | 1966-05-17 | 1967-08-08 | Armstrong Cork Co | Package for dispensing liquids |
| US3441353A (en) * | 1967-01-31 | 1969-04-29 | Claff Clarence L | Perfume dispenser |
| US3464413A (en) * | 1967-05-26 | 1969-09-02 | United Merchants & Mfg | Medical bandages |
| US3541581A (en) * | 1967-11-13 | 1970-11-17 | Johnson & Son Inc S C | Package containing a post-foaming gel |
| US3516846A (en) * | 1969-11-18 | 1970-06-23 | Minnesota Mining & Mfg | Microcapsule-containing paper |
Non-Patent Citations (1)
| Title |
|---|
| Miles J. M. et al., J. Soc. Cosmet. Chem. 22: 655 666 (Sept. 17, 1971) Encapsulated Perfumes in Aerosol Products. * |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3839220A (en) * | 1968-10-23 | 1974-10-01 | Mennen Co | Microcapsules for use in pressurized systems |
| US4220447A (en) * | 1971-07-29 | 1980-09-02 | L'oreal | Solid, frozen stabilized hair dye |
| US4183911A (en) * | 1973-09-18 | 1980-01-15 | Colgate-Palmolive Company | Antiperspirant compositions |
| US3918452A (en) * | 1974-08-01 | 1975-11-11 | Edward Cornfeld | Tampons impregnated with contraceptive compositions |
| US4147766A (en) * | 1976-06-09 | 1979-04-03 | Armour Pharmaceutical Company | Macrospherical particles of anti-perspirants |
| US4149551A (en) * | 1977-03-28 | 1979-04-17 | The Procter & Gamble Company | Method of conditioning hair using a flexible substrate |
| US4247537A (en) * | 1977-11-09 | 1981-01-27 | Lunn Peter F R | Bleaching systems comprising percarbonate, persulfate, and pyrogenic silica |
| US4439343A (en) * | 1979-07-23 | 1984-03-27 | United Industries Corporation | Aerosol preparation |
| US4439342A (en) * | 1979-07-23 | 1984-03-27 | United Industries Corporation | Aerosol preparation |
| US4635651A (en) * | 1980-08-29 | 1987-01-13 | Jacobs Allen W | Process for the inclusion of a solid particulate component into aerosol formulations of inhalable nicotine |
| US4608211A (en) * | 1983-03-22 | 1986-08-26 | L'oreal | Process for preparing lipid vesicles by vaporisation of solvents |
| US4979638A (en) * | 1987-05-14 | 1990-12-25 | Bolduc Lee R | Aerosol dispenser with sealed actuator |
| US5018643A (en) * | 1987-05-14 | 1991-05-28 | Bolduc Lee R | Aerosol dispenser with sealed actuator and aerosol dispensing method |
| US5061106A (en) * | 1988-03-08 | 1991-10-29 | Colgate-Palmolive Company | Toothbrush with slow release of disinfectant and antibacterial agents and method of manufacturing the same |
| US4941615A (en) * | 1988-10-03 | 1990-07-17 | Bolduc Lee R | Aerosol dispenser |
| US5012978A (en) * | 1988-10-03 | 1991-05-07 | Bolduc Lee R | Aerosol dispenser and method |
| US5064121A (en) * | 1988-10-03 | 1991-11-12 | Bolduc Lee R | Dispenser |
| US5052585A (en) * | 1988-10-24 | 1991-10-01 | Bolduc Lee R | Dispenser |
| US6102036A (en) * | 1994-04-12 | 2000-08-15 | Smoke-Stop | Breath activated inhaler |
| US5858343A (en) * | 1997-01-31 | 1999-01-12 | S. C. Johnson & Son, Inc. | Post-foaming shaving gel including poly(ethylene oxide) and polyvinylpyrrolidone in a preferred range of weight ratios |
| US6352689B1 (en) | 1997-01-31 | 2002-03-05 | S. C. Johnson & Son, Inc. | Post-foaming shaving gel including poly (ethylene oxide) and polyvinylpyrrolidone in a preferred range of weight ratios |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2005075A1 (en) | 1970-08-06 |
| BE744920A (en) | 1970-07-27 |
| CH520529A (en) | 1972-03-31 |
| FR2033287A1 (en) | 1970-12-04 |
| LU57891A1 (en) | 1970-08-04 |
| GB1295036A (en) | 1972-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3679102A (en) | Aerosol composition and method for producing same | |
| US3648899A (en) | Method and apparatus for dyeing hair | |
| US4690825A (en) | Method for delivering an active ingredient by controlled time release utilizing a novel delivery vehicle which can be prepared by a process utilizing the active ingredient as a porogen | |
| US4828542A (en) | Foam substrate and micropackaged active ingredient particle composite dispensing materials | |
| US2764454A (en) | Aerosol apparatus for decorative coating and process for making said apparatus | |
| US4305502A (en) | Pharmaceutical dosage form packges | |
| SU1075948A3 (en) | Method for making microcapsules | |
| US5510116A (en) | Pressurized product delivery systems | |
| JP4693202B2 (en) | Composition of topical pharmaceutical / cosmetic semi-solid post-foaming dosage form contained in pouch and its production | |
| US4679706A (en) | Dispensing system with inflatable bag propelling mechanism and separate product gas phase | |
| US3839220A (en) | Microcapsules for use in pressurized systems | |
| US3635261A (en) | Method and apparatus for packaging products which are to be stored separately but dispensed simultaneously | |
| US3985298A (en) | Controlled release materials and method of use | |
| US3779942A (en) | Capsules and process for forming capsules | |
| JPH0356135A (en) | Gas storage and dispersion systems | |
| JPH03501940A (en) | Apparatus and method for microcapsule preparation | |
| KR840005335A (en) | Method for preparing free-flowing epitcellulose microcapsules | |
| CN110250549A (en) | A high-efficiency anti-leakage water-carrying capsule and its preparation method | |
| JPH0694195A (en) | Gas storage supply system | |
| US3129855A (en) | Aerosol package | |
| US4844885A (en) | Frangible capsules containing composition | |
| WO1995017340A1 (en) | Method and apparatus for release of sorbed gas | |
| GB1295037A (en) | ||
| GB1295038A (en) | ||
| FR2754450A1 (en) | SUPPORT MATERIAL FOR MICROCAPSULES |